Class: Standard Abstract
- Inherits:
-
Object
- Object
- Standard
- Includes:
- CoilDX, CoolingTower, Fan, PrototypeFan, Pump
- Defined in:
- lib/openstudio-standards/standards/standard.rb,
lib/openstudio-standards/weather/Weather.Model.rb,
lib/openstudio-standards/standards/Standards.Model.rb,
lib/openstudio-standards/standards/Standards.Space.rb,
lib/openstudio-standards/standards/Standards.Surface.rb,
lib/openstudio-standards/standards/Standards.FanOnOff.rb,
lib/openstudio-standards/standards/Standards.PlantLoop.rb,
lib/openstudio-standards/standards/Standards.SpaceType.rb,
lib/openstudio-standards/standards/Standards.SubSurface.rb,
lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb,
lib/openstudio-standards/standards/Standards.ThermalZone.rb,
lib/openstudio-standards/standards/Standards.Construction.rb,
lib/openstudio-standards/standards/Standards.BuildingStory.rb,
lib/openstudio-standards/standards/Standards.PlanarSurface.rb,
lib/openstudio-standards/standards/Standards.BoilerHotWater.rb,
lib/openstudio-standards/standards/Standards.FanZoneExhaust.rb,
lib/openstudio-standards/standards/Standards.ScheduleCompact.rb,
lib/openstudio-standards/standards/Standards.ScheduleRuleset.rb,
lib/openstudio-standards/standards/Standards.ScheduleConstant.rb,
lib/openstudio-standards/standards/Standards.WaterHeaterMixed.rb,
lib/openstudio-standards/standards/Standards.FanConstantVolume.rb,
lib/openstudio-standards/standards/Standards.FanVariableVolume.rb,
lib/openstudio-standards/standards/Standards.PumpConstantSpeed.rb,
lib/openstudio-standards/standards/Standards.PumpVariableSpeed.rb,
lib/openstudio-standards/standards/Standards.ZoneHVACComponent.rb,
lib/openstudio-standards/standards/Standards.ChillerElectricEIR.rb,
lib/openstudio-standards/standards/Standards.CoolingTowerTwoSpeed.rb,
lib/openstudio-standards/standards/Standards.HeatExchangerSensLat.rb,
lib/openstudio-standards/standards/Standards.CoilCoolingDXTwoSpeed.rb,
lib/openstudio-standards/standards/Standards.CoilCoolingDXMultiSpeed.rb,
lib/openstudio-standards/standards/Standards.CoilHeatingDXMultiSpeed.rb,
lib/openstudio-standards/standards/Standards.CoolingTowerSingleSpeed.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.FanOnOff.rb,
lib/openstudio-standards/standards/Standards.CoilCoolingDXSingleSpeed.rb,
lib/openstudio-standards/standards/Standards.CoilHeatingDXSingleSpeed.rb,
lib/openstudio-standards/standards/Standards.CoilHeatingGasMultiStage.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.Model.swh.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb,
lib/openstudio-standards/standards/Standards.CoolingTowerVariableSpeed.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.Model.hvac.rb,
lib/openstudio-standards/standards/Standards.HeaderedPumpsConstantSpeed.rb,
lib/openstudio-standards/standards/Standards.HeaderedPumpsVariableSpeed.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.refrigeration.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.CoilHeatingGas.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.FanZoneExhaust.rb,
lib/openstudio-standards/standards/Standards.AirTerminalSingleDuctVAVReheat.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.Model.elevators.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.FanConstantVolume.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.FanVariableVolume.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.ControllerWaterCoil.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.Model.exterior_lights.rb,
lib/openstudio-standards/standards/Standards.AirTerminalSingleDuctParallelPIUReheat.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.AirTerminalSingleDuctVAVReheat.rb,
lib/openstudio-standards/prototypes/common/objects/Prototype.HeatExchangerAirToAirSensibleAndLatent.rb
Overview
This abstract class holds generic methods that many energy standards would commonly use. Many of the methods in this class apply efficiency values from the OpenStudio-Standards spreadsheet. If a method in this class is redefined by a subclass, the implementation in the subclass is used.
Constant Summary collapse
- STANDARDS_LIST =
A list of available Standards subclasses that can be created using the Standard.build() method.
{}
Instance Attribute Summary collapse
-
#space_multiplier_map ⇒ Object
Returns the value of attribute space_multiplier_map.
-
#standards_data ⇒ Object
readonly
Returns the value of attribute standards_data.
-
#template ⇒ Object
readonly
Returns the value of attribute template.
Model collapse
-
#model_add_constant_schedule_ruleset(model, value, name = nil) ⇒ Object
Create constant ScheduleRuleset.
-
#model_add_construction(model, construction_name, construction_props = nil) ⇒ Object
Create a construction from the openstudio standards dataset.
-
#model_add_construction_set(model, clim, building_type, spc_type, is_residential) ⇒ Object
Create a construction set from the openstudio standards dataset.
-
#model_add_curve(model, curve_name) ⇒ Object
Adds a curve from the OpenStudio-Standards dataset to the model based on the curve name.
-
#model_add_daylighting_controls(model) ⇒ Object
Applies daylighting controls to each space in the model per the standard.
-
#model_add_material(model, material_name) ⇒ Object
Create a material from the openstudio standards dataset.
-
#model_add_prm_baseline_system(model, system_type, main_heat_fuel, zone_heat_fuel, cool_fuel, zones) ⇒ Object
Add the specified baseline system type to the specified zons based on the specified template.
-
#model_add_prm_construction_set(model, category) ⇒ OpenStudio::Model::DefaultConstructionSet
Creates a construction set with the construction types specified in the Performance Rating Method (aka Appendix G aka LEED) and adds it to the model.
-
#model_add_schedule(model, schedule_name) ⇒ ScheduleRuleset
Create a schedule from the openstudio standards dataset and add it to the model.
-
#model_apply_hvac_efficiency_standard(model, climate_zone) ⇒ Object
Applies the HVAC parts of the template to all objects in the model using the the template specified in the model.
-
#model_apply_infiltration_standard(model) ⇒ Bool
Apply the air leakage requirements to the model, as described in PNNL section 5.2.1.6.
-
#model_apply_multizone_vav_outdoor_air_sizing(model) ⇒ Object
Applies the multi-zone VAV outdoor air sizing requirements to all applicable air loops in the model.
-
#model_apply_prm_baseline_skylight_to_roof_ratio(model) ⇒ Object
Reduces the SRR to the values specified by the PRM.
-
#model_apply_prm_baseline_window_to_wall_ratio(model, climate_zone) ⇒ Object
Reduces the WWR to the values specified by the PRM.
-
#model_apply_prm_construction_types(model) ⇒ Bool
Go through the default construction sets and hard-assigned constructions.
-
#model_apply_prm_sizing_parameters(model) ⇒ Object
Changes the sizing parameters to the PRM specifications.
-
#model_apply_standard_constructions(model, climate_zone) ⇒ Bool
Apply the standard construction to each surface in the model, based on the construction type currently assigned.
-
#model_assign_spaces_to_stories(model) ⇒ Bool
Assign each space in the model to a building story based on common z (height) values.
-
#model_baseline_system_vav_fan_type(model) ⇒ String
Determines the fan type used by VAV_Reheat and VAV_PFP_Boxes systems.
-
#model_create_prm_baseline_building(model, building_type, climate_zone, custom = nil, sizing_run_dir = Dir.pwd, debug = false) ⇒ Bool
Creates a Performance Rating Method (aka Appendix G aka LEED) baseline building model based on the inputs currently in the model.
-
#model_create_prm_baseline_building_requires_vlt_sizing_run(model) ⇒ Object
Determine if there needs to be a sizing run after constructions are added so that EnergyPlus can calculate the VLTs of layer-by-layer glazing constructions.
-
#model_create_space_type_hash(model, trust_effective_num_spaces = false) ⇒ hash
create space_type_hash with info such as effective_num_spaces, num_units, num_meds, num_meals.
-
#model_create_story_hash(model) ⇒ hash
Create sorted hash of stories with data need to determine effective number of stories above and below grade the key should be the story object, which would allow other measures the ability to for example loop through spaces of the bottom story.
-
#model_differentiate_primary_secondary_thermal_zones(model, zones) ⇒ Hash
Determine which of the zones should be served by the primary HVAC system.
-
#model_effective_num_stories(model) ⇒ Object
populate this method Determine the effective number of stories above and below grade.
-
#model_eliminate_outlier_zones(model, array_of_zones, key_to_inspect, tolerance, field_name, units) ⇒ Object
with the keys ‘zone’,.
-
#model_find_and_add_construction(model, climate_zone_set, intended_surface_type, standards_construction_type, building_category) ⇒ Object
Helper method to find a particular construction and add it to the model after modifying the insulation value if necessary.
-
#model_find_ashrae_hot_water_demand(model) ⇒ Array
Returns average daily hot water consumption by building type recommendations from 2011 ASHRAE Handobook - HVAC Applications Table 7 section 60.14 Not all building types are included in lookup some recommendations have multiple values based on number of units.
-
#model_find_climate_zone_set(model, clim) ⇒ Object
Helper method to find out which climate zone set contains a specific climate zone.
-
#model_find_constructions(model, boundary_condition, type) ⇒ Object
Get a unique list of constructions with given boundary condition and a given type of surface.
-
#model_find_icc_iecc_2015_hot_water_demand(model, units_per_bldg, bedrooms_per_unit) ⇒ Double
Returns average daily hot water consumption for residential buildings gal/day from ICC IECC 2015 Residential Standard Reference Design from Table R405.5.2(1).
-
#model_find_icc_iecc_2015_internal_loads(model, units_per_bldg, bedrooms_per_unit) ⇒ Hash
Returns average daily internal loads for residential buildings from Table R405.5.2(1).
-
#model_find_object(hash_of_objects, search_criteria, capacity = nil, date = nil) ⇒ Hash
Method to search through a hash for an object that meets the desired search criteria, as passed via a hash.
-
#model_find_objects(hash_of_objects, search_criteria, capacity = nil) ⇒ Array
Method to search through a hash for the objects that meets the desired search criteria, as passed via a hash.
-
#model_find_prototype_floor_area(model, building_type) ⇒ Double
Keep track of floor area for prototype buildings.
-
#model_find_target_eui(model) ⇒ Double
user needs to pass in template as string.
-
#model_find_target_eui_by_end_use(model) ⇒ Hash
user needs to pass in template as string.
-
#model_get_baseline_system_type_by_zone(model, climate_zone, custom = nil) ⇒ Hash
Looks through the model and creates an hash of what the baseline system type should be for each zone.
-
#model_get_building_climate_zone_and_building_type(model, remap_office = true) ⇒ hash
this is used by other methods to get the clinzte aone and building type from a model.
-
#model_get_climate_zone_set_from_list(model, possible_climate_zone_sets) ⇒ Object
Determine which climate zone to use.
-
#model_get_construction_properties(model, intended_surface_type, standards_construction_type, building_category = 'Nonresidential') ⇒ hash
Returns standards data for selected construction.
-
#model_get_full_weather_file_path(model) ⇒ OpenStudio::OptionalPath
Get the full path to the weather file that is specified in the model.
-
#model_get_story_for_nominal_z_coordinate(model, minz, tolerance = 0.3) ⇒ OpenStudio::Model::BuildingStory
Helper method to get the story object that cooresponds to a specific minimum z value.
-
#model_group_zones_by_story(model, zones) ⇒ Array<Array<OpenStudio::Model::ThermalZone>>
Group an array of zones into multiple arrays, one for each story in the building.
-
#model_make_name(model, clim, building_type, spc_type) ⇒ Object
Helper method to make a shortened version of a name that will be readable in a GUI.
-
#model_num_stories_spanned(model, zones) ⇒ Integer
Determine the number of stories spanned by the supplied zones.
-
#model_prm_baseline_system_change_fuel_type(model, fuel_type, climate_zone, custom = nil) ⇒ String
Change the fuel type based on climate zone, depending on the standard.
-
#model_prm_baseline_system_group_minimum_area(model, custom) ⇒ Double
Determines the area of the building above which point the non-dominant area type gets it’s own HVAC system type.
-
#model_prm_baseline_system_groups(model, custom) ⇒ Array<Hash>
Determine the dominant and exceptional areas of the building based on fuel types and occupancy types.
-
#model_prm_baseline_system_number(model, climate_zone, area_type, fuel_type, area_ft2, num_stories, custom) ⇒ String
Determines which system number is used for the baseline system.
-
#model_prm_baseline_system_type(model, climate_zone, area_type, fuel_type, area_ft2, num_stories, custom) ⇒ String
Determine the baseline system type given the inputs.
-
#model_prm_skylight_to_roof_ratio_limit(model) ⇒ Double
Determines the skylight to roof ratio limit for a given standard 5% by default.
-
#model_process_results_for_datapoint(model, climate_zone, building_type) ⇒ Hash
Method to gather prototype simulation results for a specific climate zone, building type, and template.
-
#model_remap_office(model, floor_area) ⇒ String
remap office to one of the protptye buildings.
-
#model_remove_external_shading_devices(model) ⇒ Bool
Remove external shading devices.
-
#model_remove_prm_hvac(model) ⇒ Bool
Remove all HVAC that will be replaced during the performance rating method baseline generation.
-
#model_residential_and_nonresidential_floor_areas(model) ⇒ Hash
Determine the residential and nonresidential floor areas based on the space type properties for each space.
-
#model_validate_standards_spacetypes_in_model(model) ⇒ Object
This method ensures that all spaces with spacetypes defined contain at least a standardSpaceType appropriate for the template.
-
#model_zones_with_occ_and_fuel_type(model, custom) ⇒ Array<Hash>
Categorize zones by occupancy type and fuel type, where the types depend on the standard.
Space collapse
-
#space_add_daylighting_controls(space, remove_existing_controls, draw_daylight_areas_for_debugging = false) ⇒ Hash
Adds daylighting controls (sidelighting and toplighting) per the template.
-
#space_apply_infiltration_rate(space) ⇒ Double
Set the infiltration rate for this space to include the impact of air leakage requirements in the standard.
-
#space_conditioning_category(space, climate_zone) ⇒ String
Determines whether the space is conditioned per 90.1, which is based on heating and cooling loads.
-
#space_cooled?(space) ⇒ Bool
Determines cooling status.
-
#space_daylighted_area_window_width(space) ⇒ String
Determines the method used to extend the daylighted area horizontally next to a window.
-
#space_daylighted_areas(space, draw_daylight_areas_for_debugging = false) ⇒ Hash
Returns values for the different types of daylighted areas in the space.
-
#space_daylighting_control_required?(space, areas) ⇒ Array<Bool>
Determine if the space requires daylighting controls for toplighting, primary sidelighting, and secondary sidelighting.
-
#space_daylighting_fractions_and_windows(space, areas, sorted_windows, sorted_skylights, req_top_ctrl, req_pri_ctrl, req_sec_ctrl) ⇒ Object
Determine the fraction controlled by each sensor and which window each sensor should go near.
-
#space_design_internal_load(space) ⇒ Double
Determine the design internal load (W) for this space without space multipliers.
-
#space_exterior_wall_and_roof_and_subsurface_area(space) ⇒ Double
Calculate the area of the exterior walls, including the area of the windows on these walls.
-
#space_exterior_wall_and_window_area(space) ⇒ Double
Calculate the area of the exterior walls, including the area of the windows on these walls.
-
#space_get_adjacent_space_with_most_shared_wall_area(space, same_floor = true) ⇒ Object
Find the space that has the most wall area touching this space.
-
#space_get_adjacent_spaces_with_shared_wall_areas(space, same_floor = true) ⇒ Object
will return a sorted array of array of spaces and connected area (Descending).
-
#space_heated?(space) ⇒ Bool
Determines heating status.
-
#space_infiltration_rate_75_pa(space) ⇒ Double
Determine the base infiltration rate at 75 PA.
-
#space_plenum?(space) ⇒ Boolean
Determine if the space is a plenum.
-
#space_residential?(space) ⇒ Boolean
Determine if the space is residential based on the space type properties for the space.
-
#space_sidelighting_effective_aperture(space, primary_sidelighted_area) ⇒ Double
Returns the sidelighting effective aperture space_sidelighting_effective_aperture(space) = E(window area * window VT) / primary_sidelighted_area.
-
#space_skylight_effective_aperture(space, toplighted_area) ⇒ Double
Returns the skylight effective aperture space_skylight_effective_aperture(space) = E(0.85 * skylight area * skylight VT * WF) / toplighted_area.
Surface collapse
-
#surface_component_infiltration_rate(surface, type) ⇒ Double
Determine the component infiltration rate for this surface.
PlantLoop collapse
-
#plant_loop_apply_prm_baseline_chilled_water_pumping_type(plant_loop) ⇒ Object
Applies the chilled water pumping controls to the loop based on Appendix G.
-
#plant_loop_apply_prm_baseline_chilled_water_temperatures(plant_loop) ⇒ Object
Applies the chilled water temperatures to the plant loop based on Appendix G.
-
#plant_loop_apply_prm_baseline_condenser_water_pumping_type(plant_loop) ⇒ Object
Applies the condenser water pumping controls to the loop based on Appendix G.
-
#plant_loop_apply_prm_baseline_condenser_water_temperatures(plant_loop) ⇒ Object
Applies the condenser water temperatures to the plant loop based on Appendix G.
-
#plant_loop_apply_prm_baseline_hot_water_pumping_type(plant_loop) ⇒ Object
Applies the hot water pumping controls to the loop based on Appendix G.
-
#plant_loop_apply_prm_baseline_hot_water_temperatures(plant_loop) ⇒ Object
Applies the hot water temperatures to the plant loop based on Appendix G.
-
#plant_loop_apply_prm_baseline_pump_power(plant_loop) ⇒ Object
TODO: I think it makes more sense to sense the motor efficiency right there…
-
#plant_loop_apply_prm_baseline_pumping_type(plant_loop) ⇒ Object
Applies the pumping controls to the loop based on Appendix G.
-
#plant_loop_apply_prm_baseline_temperatures(plant_loop) ⇒ TrueClass
Applies the temperatures to the plant loop based on Appendix G.
-
#plant_loop_apply_prm_number_of_boilers(plant_loop) ⇒ Object
Splits the single boiler used for the initial sizing run into multiple separate boilers based on Appendix G.
-
#plant_loop_apply_prm_number_of_chillers(plant_loop) ⇒ Object
Splits the single chiller used for the initial sizing run into multiple separate chillers based on Appendix G.
-
#plant_loop_apply_prm_number_of_cooling_towers(plant_loop) ⇒ Object
Splits the single cooling tower used for the initial sizing run into multiple separate cooling towers based on Appendix G.
-
#plant_loop_apply_standard_controls(plant_loop, climate_zone) ⇒ Bool
Apply all standard required controls to the plantloop.
-
#plant_loop_enable_supply_water_temperature_reset(plant_loop) ⇒ TrueClass
Enable reset of hot or chilled water temperature based on outdoor air temperature.
-
#plant_loop_find_maximum_loop_flow_rate(plant_loop) ⇒ Double
find maximum_loop_flow_rate.
-
#plant_loop_prm_baseline_condenser_water_temperatures(plant_loop, design_oat_wb_c) ⇒ Array<Double>
Determine the performance rating method specified design condenser water temperature, approach, and range.
-
#plant_loop_supply_water_temperature_reset_required?(plant_loop) ⇒ Boolean
Determine if temperature reset is required.
-
#plant_loop_swh_loop?(plant_loop) ⇒ Boolean
Determines if the loop is a Service Water Heating loop by checking if there is a WaterUseConnection on the demand side or a WaterHeaterMixed on the supply side.
-
#plant_loop_swh_system_type(plant_loop) ⇒ Array<Array<String>, Bool, Double, Double>
Classifies the service water system and returns information about fuel types, whether it serves both heating and service water heating, the water storage volume, and the total heating capacity.
-
#plant_loop_total_cooling_capacity(plant_loop) ⇒ Double, Fixnum
Get the total cooling capacity for the plant loop.
-
#plant_loop_total_floor_area_served(plant_loop) ⇒ Object
Determine the total floor area served by this loop.
-
#plant_loop_total_heating_capacity(plant_loop) ⇒ Double, Object
Get the total heating capacity for the plant loop.
-
#plant_loop_total_rated_w_per_gpm(plant_loop) ⇒ Double
Determines the total rated watts per GPM of the loop.
-
#plant_loop_variable_flow_system?(plant_loop) ⇒ Boolean
Determine if the plant loop is variable flow.
SpaceType collapse
-
#space_type_apply_internal_load_schedules(space_type, set_people, set_lights, set_electric_equipment, set_gas_equipment, set_ventilation, set_infiltration, make_thermostat) ⇒ Bool
Sets the schedules for the selected internal loads to typical schedules.
-
#space_type_apply_internal_loads(space_type, set_people, set_lights, set_electric_equipment, set_gas_equipment, set_ventilation, set_infiltration) ⇒ Bool
Sets the selected internal loads to standards-based or typical values.
-
#space_type_apply_rendering_color(space_type) ⇒ Bool
Sets the color for the space types as shown in the SketchUp plugin using render by space type.
-
#space_type_get_construction_properties(space_type, intended_surface_type, standards_construction_type) ⇒ hash
Returns standards data for selected construction.
-
#space_type_get_standards_data(space_type) ⇒ hash
Returns standards data for selected space type and template.
SubSurface collapse
-
#sub_surface_component_infiltration_rate(sub_surface, type) ⇒ Double
Determine the component infiltration rate for this surface.
-
#sub_surface_reduce_area_by_percent_by_raising_sill(sub_surface, percent_reduction) ⇒ Object
Reduce the area of the subsurface by raising the sill height.
-
#sub_surface_reduce_area_by_percent_by_shrinking_toward_centroid(sub_surface, percent_reduction) ⇒ Object
Reduce the area of the subsurface by shrinking it toward the centroid.
-
#sub_surface_vertical_rectangle?(sub_surface) ⇒ Boolean
Determine if the sub surface is a vertical rectangle, meaning a rectangle where the bottom is parallel to the ground.
AirLoopHVAC collapse
-
#air_loop_hvac_add_motorized_oa_damper(air_loop_hvac, min_occ_pct = 0.15, occ_sch = nil) ⇒ Bool
Add a motorized damper by modifying the OA schedule to require zero OA during unoccupied hours.
-
#air_loop_hvac_adjust_minimum_vav_damper_positions(air_loop_hvac) ⇒ Bool
Adjust minimum VAV damper positions to the values.
-
#air_loop_hvac_adjust_minimum_vav_damper_positions_outpatient(air_loop_hvac) ⇒ Object
For critical zones of Outpatient, if the minimum airflow rate required by the accreditation standard (AIA 2001) is significantly less than the autosized peak design airflow in any of the three climate zones (Houston, Baltimore and Burlington), the minimum airflow fraction of the terminal units is reduced to the value: “required minimum airflow rate / autosized peak design flow” Reference: <Achieving the 30% Goal: Energy and Cost Savings Analysis of ASHRAE Standard 90.1-2010> Page109-111 For implementation purpose, since it is time-consuming to perform autosizing in three climate zones, just use the results of the current climate zone.
-
#air_loop_hvac_allowable_system_brake_horsepower(air_loop_hvac) ⇒ Double
Determine the allowable fan system brake horsepower Per Table 6.5.3.1.1A.
-
#air_loop_hvac_apply_baseline_fan_pressure_rise(air_loop_hvac) ⇒ Object
Set the fan pressure rises that will result in the system hitting the baseline allowable fan power.
-
#air_loop_hvac_apply_economizer_integration(air_loop_hvac, climate_zone) ⇒ Bool
For systems required to have an economizer, set the economizer to integrated on non-integrated per the standard.
-
#air_loop_hvac_apply_economizer_limits(air_loop_hvac, climate_zone) ⇒ Bool
Set the economizer limits per the standard.
-
#air_loop_hvac_apply_energy_recovery_ventilator(air_loop_hvac) ⇒ Bool
Add an ERV to this airloop.
-
#air_loop_hvac_apply_maximum_reheat_temperature(air_loop_hvac, max_reheat_c) ⇒ Bool
Sets the maximum reheat temperature to the specified value for all reheat terminals (of any type) on the loop.
-
#air_loop_hvac_apply_minimum_vav_damper_positions(air_loop_hvac, has_ddc = true) ⇒ Bool
Set the minimum VAV damper positions.
-
#air_loop_hvac_apply_multizone_vav_outdoor_air_sizing(air_loop_hvac) ⇒ Object
Apply multizone vav outdoor air method and adjust multizone VAV damper positions to achieve a system minimum ventilation effectiveness of 0.6 per PNNL.
-
#air_loop_hvac_apply_prm_baseline_controls(air_loop_hvac, climate_zone) ⇒ Bool
Apply all PRM baseline required controls to the airloop.
-
#air_loop_hvac_apply_prm_baseline_economizer(air_loop_hvac, climate_zone) ⇒ Bool
Apply the PRM economizer type and set temperature limits.
-
#air_loop_hvac_apply_prm_baseline_fan_power(air_loop_hvac) ⇒ Object
Calculate and apply the performance rating method baseline fan power to this air loop.
-
#air_loop_hvac_apply_prm_sizing_temperatures(air_loop_hvac) ⇒ Bool
Set the system sizing properties based on the zone sizing information.
-
#air_loop_hvac_apply_single_zone_controls(air_loop_hvac, climate_zone) ⇒ Bool
Generate the EMS used to implement the economizer and staging controls for packaged single zone units.
-
#air_loop_hvac_apply_standard_controls(air_loop_hvac, climate_zone) ⇒ Bool
Apply all standard required controls to the airloop.
-
#air_loop_hvac_apply_vav_damper_action(air_loop_hvac) ⇒ Bool
Set the VAV damper control to single maximum or dual maximum control depending on the standard.
-
#air_loop_hvac_data_center_area_served(air_loop_hvac) ⇒ Double
Determine how much data center area the airloop serves.
-
#air_loop_hvac_dcv_required_when_erv(air_loop_hvac) ⇒ Object
Determine if the standard has an exception for demand control ventilation when an energy recovery device is present.
-
#air_loop_hvac_demand_control_ventilation_limits(air_loop_hvac) ⇒ Array<Double>
Determines the OA flow rates above which an economizer is required.
-
#air_loop_hvac_demand_control_ventilation_required?(air_loop_hvac, climate_zone) ⇒ Bool
Determine if demand control ventilation (DCV) is required for this air loop.
-
#air_loop_hvac_disable_multizone_vav_optimization(air_loop_hvac) ⇒ Bool
Disable multizone vav optimization by changing the Outdoor Air Method in the Controller:MechanicalVentilation object to ‘ZoneSum’.
-
#air_loop_hvac_dx_cooling?(air_loop_hvac) ⇒ Bool
Determine if this Air Loop uses DX cooling.
-
#air_loop_hvac_economizer?(air_loop_hvac) ⇒ Bool
Determine if the system has an economizer.
-
#air_loop_hvac_economizer_limits(air_loop_hvac, climate_zone) ⇒ Array<Double>
Determine the limits for the type of economizer present on the AirLoopHVAC, if any.
-
#air_loop_hvac_economizer_required?(air_loop_hvac, climate_zone) ⇒ Bool
Determine whether or not this system is required to have an economizer.
-
#air_loop_hvac_economizer_type_allowable?(air_loop_hvac, climate_zone) ⇒ Bool
Check the economizer type currently specified in the ControllerOutdoorAir object on this air loop is acceptable per the standard.
-
#air_loop_hvac_enable_demand_control_ventilation(air_loop_hvac, climate_zone) ⇒ Bool
Enable demand control ventilation (DCV) for this air loop.
-
#air_loop_hvac_enable_multizone_vav_optimization(air_loop_hvac) ⇒ Bool
Enable multizone vav optimization by changing the Outdoor Air Method in the Controller:MechanicalVentilation object to ‘VentilationRateProcedure’.
-
#air_loop_hvac_enable_supply_air_temperature_reset_delta(air_loop_hvac) ⇒ Double
Determines supply air temperature (SAT) temperature.
-
#air_loop_hvac_enable_supply_air_temperature_reset_outdoor_temperature(air_loop_hvac) ⇒ Bool
Enable supply air temperature (SAT) reset based on outdoor air conditions.
-
#air_loop_hvac_enable_supply_air_temperature_reset_warmest_zone(air_loop_hvac) ⇒ Bool
Enable supply air temperature (SAT) reset based on the cooling demand of the warmest zone.
-
#air_loop_hvac_enable_unoccupied_fan_shutoff(air_loop_hvac, min_occ_pct = 0.15) ⇒ Bool
Shut off the system during unoccupied periods.
-
#air_loop_hvac_energy_recovery?(air_loop_hvac) ⇒ Bool
Determine if the system has energy recovery already.
-
#air_loop_hvac_energy_recovery_ventilator_flow_limit(air_loop_hvac, climate_zone, pct_oa) ⇒ Double
Determine the airflow limits that govern whether or not an ERV is required.
-
#air_loop_hvac_energy_recovery_ventilator_required?(air_loop_hvac, climate_zone) ⇒ Bool
Check if ERV is required on this airloop.
-
#air_loop_hvac_fan_power_limitation_pressure_drop_adjustment_brake_horsepower(air_loop_hvac) ⇒ Double
Determine the fan power limitation pressure drop adjustment Per Table 6.5.3.1.1B.
-
#air_loop_hvac_find_design_supply_air_flow_rate(air_loop_hvac) ⇒ Double
find design_supply_air_flow_rate.
-
#air_loop_hvac_floor_area_served(air_loop_hvac) ⇒ Object
Calculate the total floor area of all zones attached to the air loop, in m^2.
-
#air_loop_hvac_floor_area_served_exterior_zones(air_loop_hvac) ⇒ Object
Calculate the total floor area of all zones attached to the air loop that have at least one exterior surface, in m^2.
-
#air_loop_hvac_floor_area_served_interior_zones(air_loop_hvac) ⇒ Object
Calculate the total floor area of all zones attached to the air loop that have no exterior surfaces, in m^2.
-
#air_loop_hvac_get_occupancy_schedule(air_loop_hvac, occupied_percentage_threshold = 0.05) ⇒ ScheduleRuleset
This method creates a schedule where the value is zero when the overall occupancy for all zones on the airloop is below the specified threshold, and one when the overall occupancy is greater than or equal to the threshold.
-
#air_loop_hvac_integrated_economizer_required?(air_loop_hvac, climate_zone) ⇒ Boolean
Determine if the system economizer must be integrated or not.
-
#air_loop_hvac_motorized_oa_damper_limits(air_loop_hvac, climate_zone) ⇒ Array<Double>
Determine the air flow and number of story limits for whether motorized OA damper is required.
-
#air_loop_hvac_motorized_oa_damper_required?(air_loop_hvac, climate_zone) ⇒ Boolean
Determine if a motorized OA damper is required.
-
#air_loop_hvac_multi_stage_dx_cooling?(air_loop_hvac) ⇒ Bool
Determine if this Air Loop uses multi-stage DX cooling.
-
#air_loop_hvac_multizone_vav_optimization_required?(air_loop_hvac, climate_zone) ⇒ Bool
Determine if multizone vav optimization is required.
-
#air_loop_hvac_multizone_vav_system?(air_loop_hvac) ⇒ Bool
Determine if the system is a multizone VAV system.
-
#air_loop_hvac_prm_baseline_economizer_required?(air_loop_hvac, climate_zone) ⇒ Bool
Determine if an economizer is required per the PRM.
-
#air_loop_hvac_prm_economizer_type_and_limits(air_loop_hvac, climate_zone) ⇒ Array<Double>
Determine the economizer type and limits for the the PRM Defaults to 90.1-2007 logic.
-
#air_loop_hvac_remove_motorized_oa_damper(air_loop_hvac) ⇒ Object
Remove a motorized OA damper by modifying the OA schedule to require full OA at all times.
-
#air_loop_hvac_single_zone_controls_num_stages(air_loop_hvac, climate_zone) ⇒ Integer
Determine the number of stages that should be used as controls for single zone DX systems.
-
#air_loop_hvac_static_pressure_reset_required?(air_loop_hvac, has_ddc) ⇒ Boolean
Determine if static pressure reset is required for this system.
-
#air_loop_hvac_supply_air_temperature_reset_required?(air_loop_hvac, climate_zone) ⇒ Bool
Determine if the system required supply air temperature (SAT) reset.
-
#air_loop_hvac_supply_return_exhaust_relief_fans(air_loop_hvac) ⇒ Array
Get all of the supply, return, exhaust, and relief fans on this system.
-
#air_loop_hvac_system_fan_brake_horsepower(air_loop_hvac, include_terminal_fans = true) ⇒ Double
Determine the total brake horsepower of the fans on the system with or without the fans inside of fan powered terminals.
-
#air_loop_hvac_system_multiplier(air_loop_hvac) ⇒ Integer
Determine if every zone on the system has an identical multiplier.
-
#air_loop_hvac_terminal_reheat?(air_loop_hvac) ⇒ Bool
Determine if the system has terminal reheat.
-
#air_loop_hvac_total_cooling_capacity(air_loop_hvac) ⇒ Double
Get the total cooling capacity for the air loop.
-
#air_loop_hvac_unoccupied_fan_shutoff_required?(air_loop_hvac) ⇒ Bool
Determine if a system’s fans must shut off when not required.
-
#air_loop_hvac_vav_damper_action(air_loop_hvac) ⇒ String
Determine whether the VAV damper control is single maximum or dual maximum control.
-
#air_loop_hvac_vav_system?(air_loop_hvac) ⇒ Boolean
Determine if the system is a VAV system based on the fan which may be inside of a unitary system.
ThermalZone collapse
-
#thermal_zone_add_exhaust(thermal_zone, exhaust_makeup_inputs = {}) ⇒ Hash
Add Exhaust Fans based on space type lookup This measure doesn’t look if DCV is needed.
-
#thermal_zone_add_exhaust_fan_dcv(thermal_zone, change_related_objects = true, zone_mixing_objects = [], transfer_air_source_zones = []) ⇒ Bool
Add DCV to exhaust fan and if requsted to related objects.
-
#thermal_zone_add_unconditioned_thermostat(thermal_zone) ⇒ Object
Adds a thermostat that heats the space to 0 F and cools to 120 F.
-
#thermal_zone_apply_prm_baseline_supply_temperatures(thermal_zone) ⇒ Bool
Set the design delta-T for zone heating and cooling sizing supply air temperatures.
-
#thermal_zone_conditioning_category(thermal_zone, climate_zone) ⇒ String
Determines whether the zone is conditioned per 90.1, which is based on heating and cooling loads.
-
#thermal_zone_convert_oa_req_to_per_area(thermal_zone) ⇒ Bool
Convert total minimum OA requirement to a per-area value.
-
#thermal_zone_cooled?(thermal_zone) ⇒ Bool
Determines cooling status.
-
#thermal_zone_demand_control_ventilation_limits(thermal_zone) ⇒ Array<Double>
Determine the area and occupancy level limits for demand control ventilation.
-
#thermal_zone_demand_control_ventilation_required?(thermal_zone, climate_zone) ⇒ Bool
Determine if demand control ventilation (DCV) is required for this zone based on area and occupant density.
-
#thermal_zone_design_internal_load(thermal_zone) ⇒ Double
Determine the design internal load (W) for this zone without space multipliers.
-
#thermal_zone_exhaust_fan_dcv_required?(thermal_zone) ⇒ Bool
returns true if DCV is required for exhaust fan for specified tempate.
-
#thermal_zone_floor_area_with_zone_multipliers(thermal_zone) ⇒ Double
Determine the net area of the zone Loops on each space, and checks if part of total floor area or not If not part of total floor area, it is not added to the zone floor area Will multiply it by the ZONE MULTIPLIER as well!.
-
#thermal_zone_fossil_hybrid_or_purchased_heat?(thermal_zone) ⇒ Boolean
Determine if the thermal zone is a Fossil Fuel, Fossil/Electric Hybrid, and Purchased Heat zone.
-
#thermal_zone_fossil_or_electric_type(thermal_zone, custom) ⇒ String
Determine if the thermal zone’s fuel type category.
-
#thermal_zone_get_adjacent_zones_with_shared_wall_areas(thermal_zone, same_floor = true) ⇒ Array
returns adjacant_zones_with_shared_wall_areas.
-
#thermal_zone_get_occupancy_schedule(thermal_zone, occupied_percentage_threshold = 0.05) ⇒ ScheduleRuleset
This method creates a schedule where the value is zero when the overall occupancy for 1 zone is below the specified threshold, and one when the overall occupancy is greater than or equal to the threshold.
-
#thermal_zone_heated?(thermal_zone) ⇒ Bool
Determines heating status.
-
#thermal_zone_infer_system_type(thermal_zone) ⇒ String
Infers the baseline system type based on the equipment serving the zone and their heating/cooling fuels.
-
#thermal_zone_majority_space_type(thermal_zone) ⇒ Boost::Optional<OpenStudio::Model::SpaceType>
Returns the space type that represents a majority of the floor area.
-
#thermal_zone_mixed_heating_fuel?(thermal_zone) ⇒ Boolean
Determine if the thermal zone is Fossil/Purchased Heat/Electric Hybrid.
-
#thermal_zone_occupancy_type(thermal_zone) ⇒ String
Determine the thermal zone’s occupancy type category.
-
#thermal_zone_outdoor_airflow_rate(thermal_zone) ⇒ Double
Calculates the zone outdoor airflow requirement (Voz) based on the inputs in the DesignSpecification:OutdoorAir obects in all spaces in the zone.
-
#thermal_zone_outdoor_airflow_rate_per_area(thermal_zone) ⇒ Double
Calculates the zone outdoor airflow requirement and divides by the zone area.
-
#thermal_zone_plenum?(thermal_zone) ⇒ Bool
Determine if the thermal zone is a plenum based on whether a majority of the spaces in the zone are plenums or not.
-
#thermal_zone_prm_baseline_cooling_design_supply_temperature(thermal_zone) ⇒ Double
Calculate the cooling supply temperature based on the specified delta-T.
-
#thermal_zone_prm_baseline_heating_design_supply_temperature(thermal_zone) ⇒ Double
Calculate the heating supply temperature based on the specified delta-T.
-
#thermal_zone_residential?(thermal_zone) ⇒ Boolean
Determine if the thermal zone is residential based on the space type properties for the spaces in the zone.
Construction collapse
-
#construction_calculated_solar_heat_gain_coefficient(construction) ⇒ Double
Get the SHGC as calculated by EnergyPlus.
-
#construction_calculated_u_factor(construction) ⇒ Double
Get the U-Factor as calculated by EnergyPlus.
-
#construction_calculated_visible_transmittance(construction) ⇒ Double
Get the VT as calculated by EnergyPlus.
-
#construction_set_glazing_shgc(construction, target_shgc) ⇒ Bool
Sets the U-value of a construction to a specified value by modifying the thickness of the insulation layer.
-
#construction_set_glazing_u_value(construction, target_u_value_ip, intended_surface_type = 'ExteriorWall', target_includes_int_film_coefficients, target_includes_ext_film_coefficients) ⇒ Bool
Sets the U-value of a construction to a specified value by modifying the thickness of the insulation layer.
-
#construction_set_slab_f_factor(construction, target_f_factor_ip, insulation_layer_name = nil) ⇒ Bool
Set the F-Factor of a slab to a specified value.
-
#construction_set_u_value(construction, target_u_value_ip, insulation_layer_name = nil, intended_surface_type = 'ExteriorWall', target_includes_int_film_coefficients, target_includes_ext_film_coefficients) ⇒ Bool
Sets the U-value of a construction to a specified value by modifying the thickness of the insulation layer.
-
#construction_set_underground_wall_c_factor(construction, target_c_factor_ip, insulation_layer_name = nil) ⇒ Bool
Set the C-Factor of an underground wall to a specified value.
-
#construction_simple_glazing?(construction) ⇒ Bool
Determines if the construction is a simple glazing construction, as indicated by having a single layer of type SimpleGlazing.
BuildingStory collapse
-
#building_story_floor_multiplier(building_story) ⇒ Integer
Checks all spaces on this story that are part of the total floor area to see if they have the same multiplier.
-
#building_story_minimum_z_value(building_story) ⇒ Double
Gets the minimum z-value of the story.
PlanarSurface collapse
-
#planar_surface_apply_standard_construction(planar_surface, climate_zone, previous_construction_map = {}) ⇒ Hash
If construction properties can be found based on the template, the standards intended surface type, the standards construction type, the climate zone, and the occupancy type, create a construction that meets those properties and assign it to this surface.
BoilerHotWater collapse
-
#boiler_hot_water_apply_efficiency_and_curves(boiler_hot_water) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
-
#boiler_hot_water_find_capacity(boiler_hot_water) ⇒ Double
Find capacity in W.
-
#boiler_hot_water_find_search_criteria(boiler_hot_water) ⇒ Hash
find search criteria.
-
#boiler_hot_water_standard_minimum_thermal_efficiency(boiler_hot_water, rename = false) ⇒ Double
Finds lookup object in standards and return minimum thermal efficiency.
ScheduleCompact collapse
-
#schedule_compact_annual_min_max_value(schedule_compact) ⇒ Object
Returns the min and max value for this schedule.
ScheduleRuleset collapse
-
#schedule_ruleset_annual_equivalent_full_load_hrs(schedule_ruleset) ⇒ Double
Returns the equivalent full load hours (EFLH) for this schedule.
-
#schedule_ruleset_annual_hours_above_value(schedule_ruleset, lower_limit) ⇒ Double
Returns the total number of hours where the schedule is greater than the specified value.
-
#schedule_ruleset_annual_min_max_value(schedule_ruleset) ⇒ Hash
Returns the min and max value for this schedule.
ScheduleConstant collapse
-
#schedule_constant_annual_equivalent_full_load_hrs(schedule_constant) ⇒ Object
Returns the equivalent full load hours (EFLH) for this schedule.
-
#schedule_constant_annual_min_max_value(schedule_constant) ⇒ Object
Returns the min and max value for this schedule.
WaterHeaterMixed collapse
-
#water_heater_mixed_apply_efficiency(water_heater_mixed) ⇒ Bool
Applies the standard efficiency ratings and typical losses and paraisitic loads to this object.
-
#water_heater_mixed_apply_prm_baseline_fuel_type(water_heater_mixed, building_type) ⇒ Bool
Applies the correct fuel type for the water heaters in the baseline model.
-
#water_heater_mixed_find_capacity(water_heater_mixed) ⇒ Double
Finds capacity in Btu/hr.
ZoneHVACComponent collapse
-
#zone_hvac_component_apply_prm_baseline_fan_power(zone_hvac_component) ⇒ Bool
Sets the fan power of zone level HVAC equipment (PTACs, PTHPs, Fan Coils, and Unit Heaters) based on the W/cfm specified in the standard.
ChillerElectricEIR collapse
-
#chiller_electric_eir_apply_efficiency_and_curves(chiller_electric_eir, clg_tower_objs) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
-
#chiller_electric_eir_find_capacity(chiller_electric_eir) ⇒ Double
Finds capacity in W.
-
#chiller_electric_eir_find_search_criteria(chiller_electric_eir) ⇒ hash
Finds the search criteria.
-
#chiller_electric_eir_standard_minimum_full_load_efficiency(chiller_electric_eir) ⇒ Double
Finds lookup object in standards and return full load efficiency.
HeatExchangerSensLat collapse
-
#heat_exchanger_air_to_air_sensible_and_latent_apply_efficiency(heat_exchanger_air_to_air_sensible_and_latent) ⇒ Object
Sets the minimum effectiveness of the heat exchanger per the standard.
-
#heat_exchanger_air_to_air_sensible_and_latent_minimum_efficiency(heat_exchanger_air_to_air_sensible_and_latent) ⇒ Object
Defines the minimum sensible and latent effectiveness of the heat exchanger.
CoilCoolingDXMultiSpeed collapse
-
#coil_cooling_dx_multi_speed_apply_efficiency_and_curves(coil_cooling_dx_multi_speed, sql_db_vars_map) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
CoilHeatingDXMultiSpeed collapse
-
#coil_heating_dx_multi_speed_apply_efficiency_and_curves(coil_heating_dx_multi_speed, sql_db_vars_map) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
CoilHeatingGasMultiStage collapse
-
#coil_heating_gas_multi_stage_apply_efficiency_and_curves(coil_heating_gas_multi_stage, standards) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
utilities collapse
-
#adjust_infiltration_to_lower_pressure(initial_infiltration_rate_m3_per_s, intial_pressure_pa, final_pressure_pa, infiltration_coefficient = 0.65) ⇒ Object
Convert one infiltration rate at a given pressure to an infiltration rate at another pressure per method described here: www.taskair.net/knowledge/Infiltration%20Modeling%20Guidelines%20for%20Commercial%20Building%20Energy%20Analysis.pdf where the infiltration coefficient is 0.65.
-
#adjust_infiltration_to_prototype_building_conditions(initial_infiltration_rate_m3_per_s) ⇒ Double
Convert the infiltration rate at a 75 Pa to an infiltration rate at the typical value for the prototype buildings per method described here: www.pnl.gov/main/publications/external/technical_reports/PNNL-18898.pdf Gowri K, DW Winiarski, and RE Jarnagin.
-
#afue_to_thermal_eff(afue) ⇒ Double
A helper method to convert from AFUE to thermal efficiency.
-
#combustion_eff_to_thermal_eff(combustion_eff) ⇒ Double
A helper method to convert from combustion efficiency to thermal efficiency.
-
#convert_curve_biquadratic(coeffs, ip_to_si = true) ⇒ Array<Double>
Convert biquadratic curves that are a function of temperature from IP (F) to SI © or vice-versa.
-
#cop_heating_to_cop_heating_no_fan(coph47, capacity_w) ⇒ Double
Convert from COP_H to COP (no fan) for heat pump heating coils.
-
#cop_to_eer(cop, capacity_w = nil) ⇒ Double
Convert from COP to EER.
-
#cop_to_kw_per_ton(cop) ⇒ Double
Convert from COP to kW/ton.
-
#cop_to_seer(cop) ⇒ Double
Convert from COP to SEER.
-
#create_curve_bicubic(coeffs, crv_name, min_x, max_x, min_y, max_y, min_out, max_out) ⇒ Object
Create a bicubic curve of the form z = C1 + C2*x + C3*x^2 + C4*y + C5*y^2 + C6*x*y + C7*x^3 + C8*y^3 + C9*x^2*y + C10*x*y^2.
-
#create_curve_biquadratic(coeffs, crv_name, min_x, max_x, min_y, max_y, min_out, max_out) ⇒ Object
Create a biquadratic curve of the form z = C1 + C2*x + C3*x^2 + C4*y + C5*y^2 + C6*x*y.
-
#create_curve_cubic(coeffs, crv_name, min_x, max_x, min_out, max_out) ⇒ Object
Create a cubic curve of the form z = C1 + C2*x + C3*x^2 + C4*x^3.
-
#create_curve_exponent(coeffs, crv_name, min_x, max_x, min_out, max_out) ⇒ Object
Create an exponential curve of the form z = C1 + C2*x^C3.
-
#create_curve_quadratic(coeffs, crv_name, min_x, max_x, min_out, max_out, is_dimensionless = false) ⇒ Object
Create a quadratic curve of the form z = C1 + C2*x + C3*x^2.
-
#eer_to_cop(eer, capacity_w = nil) ⇒ Double
Convert from EER to COP.
-
#film_coefficients_r_value(intended_surface_type, int_film, ext_film) ⇒ Double
Gives the total R-value of the interior and exterior (if applicable) film coefficients for a particular type of surface.
-
#hspf_to_cop_heating_no_fan(hspf) ⇒ Double
Convert from HSPF to COP (no fan) for heat pump heating coils.
-
#kw_per_ton_to_cop(kw_per_ton) ⇒ Double
A helper method to convert from kW/ton to COP.
-
#load_hvac_map(hvac_map_file) ⇒ Hash
Loads a JSON file containing the space type map into a hash.
-
#safe_load_model(model_path_string) ⇒ Object
load a model into OS & version translates, exiting and erroring if a problem is found.
-
#safe_load_sql(sql_path_string) ⇒ Object
load a sql file, exiting and erroring if a problem is found.
-
#seer_to_cop_cooling_no_fan(seer) ⇒ Double
Convert from SEER to COP (no fan) for cooling coils.
- #strip_model(model) ⇒ Object
-
#thermal_eff_to_afue(teff) ⇒ Double
A helper method to convert from thermal efficiency to AFUE.
-
#thermal_eff_to_comb_eff(thermal_eff) ⇒ Double
A helper method to convert from thermal efficiency to combustion efficiency.
hvac_systems collapse
-
#model_add_baseboard(model, hot_water_loop, thermal_zones) ⇒ Array<OpenStudio::Model::ZoneHVACBaseboardConvectiveElectric, OpenStudio::Model::ZoneHVACBaseboardConvectiveWater>
Adds hydronic or electric baseboard heating to each zone.
-
#model_add_booster_swh_end_uses(model, swh_booster_loop, peak_flowrate, flowrate_schedule, water_use_temperature, building_type = nil) ⇒ OpenStudio::Model::WaterUseEquipment
Creates water fixtures and attaches them to the supplied booster water loop.
-
#model_add_cav(model, sys_name, hot_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, fan_efficiency, fan_motor_efficiency, fan_pressure_rise, chilled_water_loop = nil, building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
Creates a packaged VAV system and adds it to the model.
-
#model_add_central_air_source_heat_pump(model, thermal_zones, heating, cooling, ventilation) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Adds an air source heat pump to each zone.
-
#model_add_chw_loop(model, chw_pumping_type, chiller_cooling_type, chiller_condenser_type, chiller_compressor_type, cooling_fuel, condenser_water_loop = nil, building_type = nil, num_chillers = 1) ⇒ OpenStudio::Model::PlantLoop
Electricity, DistrictCooling.
-
#model_add_cw_loop(model, cooling_tower_type, cooling_tower_fan_type, cooling_tower_capacity_control, number_of_cells_per_tower, number_cooling_towers = 1, building_type = nil) ⇒ OpenStudio::Model::PlantLoop
Creates a condenser water loop and adds it to the model.
-
#model_add_data_center_hvac(model, sys_name, hot_water_loop, heat_pump_loop, thermal_zones, hvac_op_sch, oa_damper_sch, main_data_center = false) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Creates a data center PSZ-AC system for each zone.
-
#model_add_data_center_load(model, space, dc_watts_per_area) ⇒ Bool
Adds a data center load to a given space.
-
#model_add_district_ambient_loop(model) ⇒ OpenStudio::Model::PlantLoop
Adds an ambient condenser water loop that will be used in a district to connect buildings as a shared sink/source for heat pumps.
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#model_add_doas(model, sys_name, hot_water_loop, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, fan_max_flow_rate, economizer_control_type, building_type = nil, energy_recovery = false) ⇒ OpenStudio::Model::AirLoopHVAC
Creates a DOAS system with fan coil units for each zone.
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#model_add_evap_cooler(model, thermal_zones, building_type = nil) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Creates an evaporative cooler for each zone and adds it to the model.
-
#model_add_exhaust_fan(model, availability_sch_name, flow_rate, flow_fraction_schedule_name, balanced_exhaust_fraction_schedule_name, thermal_zones) ⇒ Array<OpenStudio::Model::FanZoneExhaust>
Adds an exhaust fan to each zone.
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#model_add_four_pipe_fan_coil(model, hot_water_loop, chilled_water_loop, thermal_zones, ventilation = true) ⇒ Array<OpenStudio::Model::ZoneHVACFourPipeFanCoil>
Adds four pipe fan coil units to each zone.
-
#model_add_furnace_central_ac(model, thermal_zones, heating, cooling, ventilation) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Adds a forced air furnace or central AC to each zone.
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#model_add_ground_hx_loop(model) ⇒ OpenStudio::Model::PlantLoop
Creates loop that roughly mimics a properly sized ground heat exchanger.
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#model_add_high_temp_radiant(model, sys_name, thermal_zones, heating_type, combustion_efficiency, building_type = nil) ⇒ Array<OpenStudio::Model::ZoneHVACHighTemperatureRadiant>
Creates a high temp radiant heater for each zone and adds it to the model.
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#model_add_hp_loop(model, building_type = nil) ⇒ OpenStudio::Model::PlantLoop
Creates a heat pump loop which has a boiler and fluid cooler for supplemental heating/cooling and adds it to the model.
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#model_add_hvac_system(model, system_type, main_heat_fuel, zone_heat_fuel, cool_fuel, zones) ⇒ Bool
Add the specified system type to the specified zones based on the specified template.
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#model_add_hw_loop(model, boiler_fuel_type, building_type = nil, ambient_loop = nil) ⇒ OpenStudio::Model::PlantLoop
Creates a hot water loop with a boiler, district heating, or a water-to-water heat pump and adds it to the model.
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#model_add_ideal_air_loads(model, thermal_zones) ⇒ Array<OpenStudio::Model::ZoneHVACIdealLoadsAirSystem>
Adds ideal air loads systems for each zone.
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#model_add_psz_ac(model, sys_name, hot_water_loop, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, fan_location, fan_type, heating_type, supplemental_heating_type, cooling_type, building_type = nil) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Creates a PSZ-AC system for each zone and adds it to the model.
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#model_add_psz_vav(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, heating_type, supplemental_heating_type, building_type = nil) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Creates a packaged single zone VAV system for each zone and adds it to the model.
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#model_add_ptac(model, sys_name, hot_water_loop, thermal_zones, fan_type, heating_type, cooling_type, building_type = nil) ⇒ Array<OpenStudio::Model::ZoneHVACPackagedTerminalAirConditioner>
Creates a PTAC system for each zone and adds it to the model.
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#model_add_pthp(model, sys_name, thermal_zones, fan_type, building_type = nil) ⇒ Array<OpenStudio::Model::ZoneHVACPackagedTerminalAirConditioner>
Creates a PTHP system for each zone and adds it to the model.
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#model_add_pvav(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, electric_reheat = false, hot_water_loop = nil, chilled_water_loop = nil, return_plenum = nil, building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
Creates a packaged VAV system and adds it to the model.
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#model_add_pvav_pfp_boxes(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, vav_fan_efficiency, vav_fan_motor_efficiency, vav_fan_pressure_rise, chilled_water_loop = nil, building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
Creates a packaged VAV system with parallel fan powered boxes and adds it to the model.
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#model_add_split_ac(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, fan_type, heating_type, supplemental_heating_type, cooling_type, building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
Creates a split DX AC system for each zone and adds it to the model.
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#model_add_swh_booster(model, main_service_water_loop, water_heater_capacity, water_heater_volume, water_heater_fuel, booster_water_temperature, parasitic_fuel_consumption_rate, booster_water_heater_thermal_zone, building_type = nil) ⇒ OpenStudio::Model::PlantLoop
Creates a booster water heater and attaches it to the supplied service water heating loop.
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#model_add_swh_end_uses(model, use_name, swh_loop, peak_flowrate, flowrate_schedule, water_use_temperature, space_name, building_type = nil) ⇒ OpenStudio::Model::WaterUseEquipment
Creates water fixtures and attaches them to the supplied service water loop.
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#model_add_swh_end_uses_by_space(model, building_type, climate_zone, swh_loop, space_type_name, space_name, space_multiplier = nil, is_flow_per_area = true) ⇒ Object
This method will add an swh water fixture to the model for the space.
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#model_add_swh_loop(model, sys_name, water_heater_thermal_zone, service_water_temperature, service_water_pump_head, service_water_pump_motor_efficiency, water_heater_capacity, water_heater_volume, water_heater_fuel, parasitic_fuel_consumption_rate, building_type = nil) ⇒ OpenStudio::Model::PlantLoop
Creates a service water heating loop.
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#model_add_unitheater(model, sys_name, thermal_zones, hvac_op_sch, fan_control_type, fan_pressure_rise, heating_type, hot_water_loop = nil, building_type = nil) ⇒ Array<OpenStudio::Model::ZoneHVACUnitHeater>
Creates a unit heater for each zone and adds it to the model.
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#model_add_vav_pfp_boxes(model, sys_name, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, vav_fan_efficiency, vav_fan_motor_efficiency, vav_fan_pressure_rise, building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open.
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#model_add_vav_reheat(model, sys_name, hot_water_loop, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, vav_fan_efficiency, vav_fan_motor_efficiency, vav_fan_pressure_rise, return_plenum, reheat_type = 'Water', building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open the supply plenum, or nil, in which case no return plenum will be used.
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#model_add_water_heater(model, water_heater_capacity, water_heater_volume, water_heater_fuel, service_water_temperature, parasitic_fuel_consumption_rate, swh_temp_sch, set_peak_use_flowrate, peak_flowrate, flowrate_schedule, water_heater_thermal_zone, building_type = nil) ⇒ OpenStudio::Model::WaterHeaterMixed
Creates a water heater and attaches it to the supplied service water heating loop.
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#model_add_water_source_hp(model, condenser_loop, thermal_zones, ventilation = true) ⇒ Array<OpenStudio::Model::ZoneHVACWaterToAirHeatPump>
Adds zone level water-to-air heat pumps for each zone.
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#model_add_window_ac(model, thermal_zones) ⇒ Array<OpenStudio::Model::ZoneHVACPackagedTerminalAirConditioner>
Adds a window air conditioner to each zone.
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#model_add_zone_erv(model, thermal_zones) ⇒ Array<OpenStudio::Model::ZoneHVACEnergyRecoveryVentilator>
Adds zone level ERVs for each zone.
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#model_add_zone_ventilation(model, availability_sch_name, flow_rate, ventilation_type, thermal_zones) ⇒ Array<OpenStudio::Model::ZoneVentilationDesignFlowRate>
Adds a zone ventilation design flow rate to each zone.
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#model_attach_water_fixtures_to_spaces?(model) ⇒ Boolean
Determine whether or not water fixtures are attached to spaces.
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#model_cw_loop_cooling_tower_fan_type(model) ⇒ String
Determine which type of fan the cooling tower will have.
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#model_get_or_add_ambient_water_loop(model) ⇒ Object
Either get the existing ambient water loop in the model or add a new one if there isn’t one already.
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#model_get_or_add_chilled_water_loop(model, cool_fuel, air_cooled = true) ⇒ Object
Either get the existing chilled water loop in the model or add a new one if there isn’t one already.
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#model_get_or_add_ground_hx_loop(model) ⇒ Object
Either get the existing ground heat exchanger loop in the model or add a new one if there isn’t one already.
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#model_get_or_add_heat_pump_loop(model) ⇒ Object
Either get the existing heat pump loop in the model or add a new one if there isn’t one already.
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#model_get_or_add_hot_water_loop(model, heat_fuel) ⇒ Object
Either get the existing hot water loop in the model or add a new one if there isn’t one already.
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#model_swh_pump_type(model, building_type) ⇒ String
Determine the type of SWH pump that a model will have.
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#model_typical_hvac_system_type(model, climate_zone, area_type, delivery_type, heating_source, cooling_source, area_m2, num_stories) ⇒ String
Determine the typical system type given the inputs.
refrigeration collapse
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#model_add_refrigeration(model, case_type, cooling_capacity_per_length, length, evaporator_fan_pwr_per_length, lighting_per_length, lighting_sch_name, defrost_pwr_per_length, restocking_sch_name, cop, cop_f_of_t_curve_name, condenser_fan_pwr, condenser_fan_pwr_curve_name, thermal_zone) ⇒ Object
Adds a single refrigerated case connected to a rack composed of a single compressor and a single air-cooled condenser.
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#model_add_refrigeration_case(model, case_type, case_name, length, thermal_zone) ⇒ Object
Add refrigerated case to the model.
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#model_add_refrigeration_compressor(model, compressor_type) ⇒ Object
Adds a refrigeration compressor to the model.
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#model_add_refrigeration_system(model, compressor_type, sys_name, cases, walkins, thermal_zone) ⇒ Object
Adds a full commercial refrigeration rack, as would be found in a supermarket, to the model.
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#model_add_refrigeration_walkin(model, walkin_type, walkin_name, insulated_floor_area, thermal_zone) ⇒ Object
Adds walkin to the model.
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#model_walkin_freezer_latent_case_credit_curve(model) ⇒ Object
Determine the latent case credit curve to use for walkins.
CoilHeatingGas collapse
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#coil_heating_gas_apply_prototype_efficiency(coil_heating_gas) ⇒ Object
Updates the efficiency of some gas heating coils per the prototype assumptions.
AirTerminalSingleDuctVAVReheat collapse
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#air_terminal_single_duct_vav_reheat_apply_initial_prototype_damper_position(air_terminal_single_duct_vav_reheat, building_type, zone_oa_per_area) ⇒ Bool
Set the initial minimum damper position based on OA rate of the space and the template.
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#air_terminal_single_duct_vav_reheat_apply_minimum_damper_position(air_terminal_single_duct_vav_reheat, zone_min_oa = nil, has_ddc = true) ⇒ Bool
Set the minimum damper position based on OA rate of the space and the template.
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#air_terminal_single_duct_vav_reheat_minimum_damper_position(air_terminal_single_duct_vav_reheat, has_ddc = false) ⇒ Object
Specifies the minimum damper position for VAV dampers.
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#air_terminal_single_duct_vav_reheat_reheat_type(air_terminal_single_duct_vav_reheat) ⇒ String
Determines whether the terminal has a NaturalGas, Electricity, or HotWater reheat coil.
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#air_terminal_single_duct_vav_reheat_set_heating_cap(air_terminal_single_duct_vav_reheat) ⇒ Object
Sets the capacity of the reheat coil based on the minimum flow fraction, and the maximum flow rate.
ControllerWaterCoil collapse
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#controller_water_coil_set_convergence_limits(controller_water_coil) ⇒ Bool
Sets the convergence tolerance to 0.0001 deltaC for all hot water coils.
AirTerminalSingleDuctParallelPIUReheat collapse
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#air_terminal_single_duct_parallel_piu_reheat_apply_prm_baseline_fan_power(air_terminal_single_duct_parallel_piu_reheat) ⇒ Bool
Sets the fan power of a PIU fan based on the W/cfm specified in the standard.
HeatExchangerAirToAirSensibleAndLatent collapse
Class Method Summary collapse
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.build(name) ⇒ Object
Create an instance of a Standard by passing it’s name.
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.register_standard(name) ⇒ Object
Add the standard to the STANDARDS_LIST.
Instance Method Summary collapse
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#coil_cooling_dx_single_speed_apply_efficiency_and_curves(coil_cooling_dx_single_speed, sql_db_vars_map) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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#coil_cooling_dx_single_speed_find_capacity(coil_cooling_dx_single_speed) ⇒ Double
Finds capacity in W.
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#coil_cooling_dx_single_speed_standard_minimum_cop(coil_cooling_dx_single_speed, rename = false) ⇒ Double
Finds lookup object in standards and return efficiency.
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#coil_cooling_dx_two_speed_apply_efficiency_and_curves(coil_cooling_dx_two_speed, sql_db_vars_map) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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#coil_cooling_dx_two_speed_find_capacity(coil_cooling_dx_two_speed) ⇒ Double
Finds capacity in W.
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#coil_cooling_dx_two_speed_standard_minimum_cop(coil_cooling_dx_two_speed, rename = false) ⇒ Double
Finds lookup object in standards and return efficiency.
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#coil_heating_dx_single_speed_apply_efficiency_and_curves(coil_heating_dx_single_speed, sql_db_vars_map) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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#coil_heating_dx_single_speed_find_capacity(coil_heating_dx_single_speed) ⇒ Double
Finds capacity in W.
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#coil_heating_dx_single_speed_standard_minimum_cop(coil_heating_dx_single_speed, rename = false) ⇒ Double
Finds lookup object in standards and return efficiency.
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#cooling_tower_single_speed_apply_efficiency_and_curves(cooling_tower_single_speed) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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#cooling_tower_two_speed_apply_efficiency_and_curves(cooling_tower_two_speed) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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#cooling_tower_variable_speed_apply_efficiency_and_curves(cooling_tower_variable_speed) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
- #define_space_multiplier ⇒ Object
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#fan_constant_volume_airloop_fan_pressure_rise(fan_constant_volume) ⇒ Double
Determine the prototype fan pressure rise for a constant volume fan on an AirLoopHVAC based on the airflow of the system.
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#fan_constant_volume_apply_prototype_fan_pressure_rise(fan_constant_volume) ⇒ Object
Sets the fan pressure rise based on the Prototype buildings inputs which are governed by the flow rate coming through the fan and whether the fan lives inside a unit heater, PTAC, etc.
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#fan_on_off_airloop_or_unitary_fan_pressure_rise(fan_on_off) ⇒ Double
Determine the prototype fan pressure rise for an on off fan on an AirLoopHVAC or inside a unitary system based on the airflow of the system.
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#fan_on_off_apply_prototype_fan_pressure_rise(fan_on_off) ⇒ Object
Sets the fan pressure rise based on the Prototype buildings inputs which are governed by the flow rate coming through the fan and whether the fan lives inside a unit heater, PTAC, etc.
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#fan_variable_volume_airloop_fan_pressure_rise(fan_variable_volume) ⇒ Double
Determine the prototype fan pressure rise for a variable volume fan on an AirLoopHVAC based on the airflow of the system.
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#fan_variable_volume_apply_prototype_fan_pressure_rise(fan_variable_volume) ⇒ Object
Sets the fan pressure rise based on the Prototype buildings inputs which are governed by the flow rate coming through the fan and whether the fan lives inside a unit heater, PTAC, etc.
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#fan_variable_volume_cooling_system_type(fan_variable_volume) ⇒ String
Determine if the cooling system is DX, CHW, evaporative, or a mixture.
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#fan_variable_volume_part_load_fan_power_limitation?(fan_variable_volume) ⇒ Boolean
Determines whether there is a requirement to have a VSD or some other method to reduce fan power at low part load ratios.
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#fan_variable_volume_part_load_fan_power_limitation_capacity_limit(fan_variable_volume) ⇒ Double
The threhold capacity below which part load control is not required.
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#fan_variable_volume_part_load_fan_power_limitation_hp_limit(fan_variable_volume) ⇒ Double
The threhold horsepower below which part load control is not required.
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#fan_variable_volume_set_control_type(fan_variable_volume, control_type) ⇒ Object
Modify the fan curve coefficients to reflect a specific type of control.
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#fan_zone_exhaust_apply_prototype_fan_pressure_rise(fan_zone_exhaust) ⇒ Object
Sets the fan pressure rise based on the Prototype buildings inputs.
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#headered_pumps_variable_speed_set_control_type(headered_pumps_variable_speed, control_type) ⇒ Object
Set the pump curve coefficients based on the specified control type.
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#heating_design_outdoor_temperatures ⇒ Array<Double>
Gets the maximum OA dry bulb temperatures for all WinterDesignDays in the model.
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#intialize ⇒ Object
set up template class variable.
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#load_standards_database ⇒ Hash
Loads the default openstudio standards dataset.
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#model_add_design_days_and_weather_file(model, climate_zone, epw_file) ⇒ Object
Helper method to set the weather file, import the design days, set water mains temperature, and set ground temperature.
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#model_add_elevator(model, space, number_of_elevators, elevator_type, elevator_schedule, elevator_fan_schedule, elevator_lights_schedule, building_type = nil) ⇒ OpenStudio::Model::ElectricEquipment
Add an elevator the the specified space.
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#model_add_elevators(model) ⇒ OpenStudio::Model::ElectricEquipment
Add elevators to the model based on the building size, number of stories, and building type.
- #model_add_ground_temperatures(model, building_type, climate_zone) ⇒ Object
- #model_add_hvac(model, building_type, climate_zone, prototype_input, epw_file) ⇒ Object
- #model_add_swh(model, building_type, climate_zone, prototype_input, epw_file) ⇒ Object
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#model_add_typical_exterior_lights(model, exterior_lighting_zone_number, onsite_parking_fraction = 1.0, add_base_site_allowance = false, use_model_for_entries_and_canopies = false) ⇒ Hash
Add exterior lighting to the model.
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#model_add_typical_swh(model, trust_effective_num_spaces = false, fuel = nil, pipe_insul_in = nil, circulating = nil) ⇒ Array
add typical swh demand and supply to model.
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#model_create_exterior_lighting_area_length_count_hash(model, space_type_hash, use_model_for_entries_and_canopies) ⇒ hash
get exterior lighting area’s, distances, and counts.
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#model_elevator_fan_pwr(model, vent_rate_cfm) ⇒ Double
Determines the power of the elevator ventilation fan.
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#model_elevator_lift_power(model, elevator_type, building_type) ⇒ Object
Determines the power required by an individual elevator of a given type.
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#model_elevator_lighting_pct_incandescent(model) ⇒ Object
Determines the percentage of the elevator cab lighting that is incandescent.
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#model_find_water_heater_capacity_volume_and_parasitic(model, water_use_equipment_array, pipe_hash = {}, storage_to_cap_ratio = 1.0, htg_eff = 0.8, inlet_temp_ip = 40.0, target_temp_ip = 140.0, peak_flow_fraction = 1.0) ⇒ Hash
set capacity, volume, and parasitic.
-
#model_get_lookup_name(building_type) ⇒ String
Get the name of the building type used in lookups.
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#pump_variable_speed_set_control_type(pump_variable_speed, control_type) ⇒ Object
Set the pump curve coefficients based on the specified control type.
Methods included from PrototypeFan
#prototype_fan_apply_prototype_fan_efficiency
Methods included from CoilDX
#coil_dx_find_search_criteria, #coil_dx_heat_pump?, #coil_dx_heating_type, #coil_dx_subcategory
Methods included from CoolingTower
#cooling_tower_apply_minimum_power_per_flow, #cooling_tower_apply_minimum_power_per_flow_gpm_limit
Methods included from Pump
#pump_apply_prm_pressure_rise_and_motor_efficiency, #pump_apply_standard_minimum_motor_efficiency, #pump_brake_horsepower, #pump_motor_horsepower, #pump_pumppower, #pump_rated_w_per_gpm, #pump_standard_minimum_motor_efficiency_and_size
Methods included from Fan
#fan_adjust_pressure_rise_to_meet_fan_power, #fan_apply_standard_minimum_motor_efficiency, #fan_baseline_impeller_efficiency, #fan_brake_horsepower, #fan_change_impeller_efficiency, #fan_change_motor_efficiency, #fan_fanpower, #fan_motor_horsepower, #fan_rated_w_per_cfm, #fan_small_fan?, #fan_standard_minimum_motor_efficiency_and_size
Instance Attribute Details
#space_multiplier_map ⇒ Object
Returns the value of attribute space_multiplier_map.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2 def space_multiplier_map @space_multiplier_map end |
#standards_data ⇒ Object (readonly)
Returns the value of attribute standards_data.
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# File 'lib/openstudio-standards/standards/standard.rb', line 7 def standards_data @standards_data end |
#template ⇒ Object (readonly)
Returns the value of attribute template.
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# File 'lib/openstudio-standards/standards/standard.rb', line 8 def template @template end |
Class Method Details
.build(name) ⇒ Object
Create an instance of a Standard by passing it’s name
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# File 'lib/openstudio-standards/standards/standard.rb', line 33 def self.build(name) if STANDARDS_LIST[name].nil? raise "ERROR: Did not find a class called '#{name}' to create in #{JSON.pretty_generate(STANDARDS_LIST)}" end return STANDARDS_LIST[name].new end |
.register_standard(name) ⇒ Object
Add the standard to the STANDARDS_LIST.
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# File 'lib/openstudio-standards/standards/standard.rb', line 22 def self.register_standard(name) STANDARDS_LIST[name] = self end |
Instance Method Details
#adjust_infiltration_to_lower_pressure(initial_infiltration_rate_m3_per_s, intial_pressure_pa, final_pressure_pa, infiltration_coefficient = 0.65) ⇒ Object
Convert one infiltration rate at a given pressure to an infiltration rate at another pressure per method described here: www.taskair.net/knowledge/Infiltration%20Modeling%20Guidelines%20for%20Commercial%20Building%20Energy%20Analysis.pdf where the infiltration coefficient is 0.65
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 299 def adjust_infiltration_to_lower_pressure(initial_infiltration_rate_m3_per_s, intial_pressure_pa, final_pressure_pa, infiltration_coefficient = 0.65) adjusted_infiltration_rate_m3_per_s = initial_infiltration_rate_m3_per_s * (final_pressure_pa / intial_pressure_pa)**infiltration_coefficient return adjusted_infiltration_rate_m3_per_s end |
#adjust_infiltration_to_prototype_building_conditions(initial_infiltration_rate_m3_per_s) ⇒ Double
Convert the infiltration rate at a 75 Pa to an infiltration rate at the typical value for the prototype buildings per method described here: www.pnl.gov/main/publications/external/technical_reports/PNNL-18898.pdf Gowri K, DW Winiarski, and RE Jarnagin. 2009. Infiltration modeling guidelines for commercial building energy analysis. PNNL-18898, Pacific Northwest National Laboratory, Richland, WA.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 314 def adjust_infiltration_to_prototype_building_conditions(initial_infiltration_rate_m3_per_s) # Details of these coefficients can be found in paper alpha = 0.22 # unitless - terrain adjustment factor intial_pressure_pa = 75.0 # 75 Pa uh = 4.47 # m/s - wind speed rho = 1.18 # kg/m^3 - air density cs = 0.1617 # unitless - positive surface pressure coefficient n = 0.65 # unitless - infiltration coefficient # Calculate the typical pressure - same for all building types final_pressure_pa = 0.5 * cs * rho * uh**2 # OpenStudio::logFree(OpenStudio::Debug, "openstudio.Standards.Space", "Final pressure PA = #{final_pressure_pa.round(3)} Pa.") adjusted_infiltration_rate_m3_per_s = (1.0 + alpha) * initial_infiltration_rate_m3_per_s * (final_pressure_pa / intial_pressure_pa)**n return adjusted_infiltration_rate_m3_per_s end |
#afue_to_thermal_eff(afue) ⇒ Double
A helper method to convert from AFUE to thermal efficiency
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 259 def afue_to_thermal_eff(afue) return afue end |
#air_loop_hvac_add_motorized_oa_damper(air_loop_hvac, min_occ_pct = 0.15, occ_sch = nil) ⇒ Bool
Add a motorized damper by modifying the OA schedule to require zero OA during unoccupied hours. This means that even during morning warmup or nightcyling, no OA will be brought into the building, lowering heating/cooling load. If no occupancy schedule is supplied, one will be created. In this case, occupied is defined as the total percent occupancy for the loop for all zones served.
the system will be considered unoccupied. If not supplied, one will be created based on the supplied occupancy threshold.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2198 def air_loop_hvac_add_motorized_oa_damper(air_loop_hvac, min_occ_pct = 0.15, occ_sch = nil) # Get the airloop occupancy schedule if none supplied if occ_sch.nil? occ_sch = thermal_zone_get_occupancy_schedule(thermal_zone, min_occ_pct) flh = schedule_ruleset_annual_equivalent_full_load_hrs(occ_sch) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Annual occupied hours = #{flh.round} hr/yr, assuming a #{min_occ_pct} occupancy threshold. This schedule will be used to close OA damper during unoccupied hours.") else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Setting motorized OA damper schedule to #{occ_sch.name}.") end # Get the OA system and OA controller oa_sys = air_loop_hvac.airLoopHVACOutdoorAirSystem if oa_sys.is_initialized oa_sys = oa_sys.get else return false # No OA system end oa_control = oa_sys.getControllerOutdoorAir # Set the minimum OA schedule to follow occupancy oa_control.setMinimumOutdoorAirSchedule(occ_sch) return true end |
#air_loop_hvac_adjust_minimum_vav_damper_positions(air_loop_hvac) ⇒ Bool
Add exception logic for systems serving parking garage, warehouse, or multifamily
Adjust minimum VAV damper positions to the values
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1473 def air_loop_hvac_adjust_minimum_vav_damper_positions(air_loop_hvac) # Total uncorrected outdoor airflow rate v_ou = 0.0 air_loop_hvac.thermalZones.each do |zone| v_ou += thermal_zone_outdoor_airflow_rate(zone) end v_ou_cfm = OpenStudio.convert(v_ou, 'm^3/s', 'cfm').get # System primary airflow rate (whether autosized or hard-sized) v_ps = 0.0 v_ps = if air_loop_hvac.autosizedDesignSupplyAirFlowRate.is_initialized air_loop_hvac.autosizedDesignSupplyAirFlowRate.get else air_loop_hvac.designSupplyAirFlowRate.get end v_ps_cfm = OpenStudio.convert(v_ps, 'm^3/s', 'cfm').get # Average outdoor air fraction x_s = v_ou / v_ps OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: v_ou = #{v_ou_cfm.round} cfm, v_ps = #{v_ps_cfm.round} cfm, x_s = #{x_s.round(2)}.") # Determine the zone ventilation effectiveness # for every zone on the system. # When ventilation effectiveness is too low, # increase the minimum damper position. e_vzs = [] e_vzs_adj = [] num_zones_adj = 0 air_loop_hvac.thermalZones.sort.each do |zone| # Breathing zone airflow rate v_bz = thermal_zone_outdoor_airflow_rate(zone) # Zone air distribution, assumed 1 per PNNL e_z = 1.0 # Zone airflow rate v_oz = v_bz / e_z # Primary design airflow rate # max of heating and cooling # design air flow rates v_pz = 0.0 clg_dsn_flow = zone.autosizedCoolingDesignAirFlowRate if clg_dsn_flow.is_initialized clg_dsn_flow = clg_dsn_flow.get if clg_dsn_flow > v_pz v_pz = clg_dsn_flow end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: #{zone.name} clg_dsn_flow could not be found.") end htg_dsn_flow = zone.autosizedHeatingDesignAirFlowRate if htg_dsn_flow.is_initialized htg_dsn_flow = htg_dsn_flow.get if htg_dsn_flow > v_pz v_pz = htg_dsn_flow end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: #{zone.name} htg_dsn_flow could not be found.") end # Get the minimum damper position mdp_term = 1.0 min_zn_flow = 0.0 zone.equipment.each do |equip| if equip.to_AirTerminalSingleDuctVAVHeatAndCoolNoReheat.is_initialized term = equip.to_AirTerminalSingleDuctVAVHeatAndCoolNoReheat.get mdp_term = term.zoneMinimumAirFlowFraction elsif equip.to_AirTerminalSingleDuctVAVHeatAndCoolReheat.is_initialized term = equip.to_AirTerminalSingleDuctVAVHeatAndCoolReheat.get mdp_term = term.zoneMinimumAirFlowFraction elsif equip.to_AirTerminalSingleDuctVAVNoReheat.is_initialized term = equip.to_AirTerminalSingleDuctVAVNoReheat.get if term.constantMinimumAirFlowFraction.is_initialized mdp_term = term.constantMinimumAirFlowFraction.get end elsif equip.to_AirTerminalSingleDuctVAVReheat.is_initialized term = equip.to_AirTerminalSingleDuctVAVReheat.get mdp_term = term.constantMinimumAirFlowFraction min_zn_flow = term.fixedMinimumAirFlowRate end end # For VAV Reheat terminals, min flow is greater of mdp # and min flow rate / design flow rate. mdp = mdp_term mdp_oa = min_zn_flow / v_ps if min_zn_flow > 0.0 mdp = [mdp_term, mdp_oa].max.round(2) end # OpenStudio::logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{self.name}: Zone #{zone.name} mdp_term = #{mdp_term.round(2)}, mdp_oa = #{mdp_oa.round(2)}; mdp_final = #{mdp}") # Zone minimum discharge airflow rate v_dz = v_pz * mdp # Zone discharge air fraction z_d = v_oz / v_dz # Zone ventilation effectiveness !!! e_vz = 1.0 + x_s - z_d # Store the ventilation effectiveness e_vzs << e_vz OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Zone #{zone.name} v_oz = #{v_oz.round(2)} m^3/s, v_pz = #{v_pz.round(2)} m^3/s, v_dz = #{v_dz.round(2)}, z_d = #{z_d.round(2)}.") # Check the ventilation effectiveness against # the minimum limit per PNNL and increase # as necessary. if e_vz < 0.6 # Adjusted discharge air fraction z_d_adj = 1.0 + x_s - 0.6 # Adjusted min discharge airflow rate v_dz_adj = v_oz / z_d_adj # Adjusted minimum damper position mdp_adj = v_dz_adj / v_pz # Don't allow values > 1 if mdp_adj > 1.0 mdp_adj = 1.0 end # Zone ventilation effectiveness e_vz_adj = 1.0 + x_s - z_d_adj # Store the ventilation effectiveness e_vzs_adj << e_vz_adj # Set the adjusted minimum damper position zone.equipment.each do |equip| if equip.to_AirTerminalSingleDuctVAVHeatAndCoolNoReheat.is_initialized term = equip.to_AirTerminalSingleDuctVAVHeatAndCoolNoReheat.get term.setZoneMinimumAirFlowFraction(mdp_adj) elsif equip.to_AirTerminalSingleDuctVAVHeatAndCoolReheat.is_initialized term = equip.to_AirTerminalSingleDuctVAVHeatAndCoolReheat.get term.setZoneMinimumAirFlowFraction(mdp_adj) elsif equip.to_AirTerminalSingleDuctVAVNoReheat.is_initialized term = equip.to_AirTerminalSingleDuctVAVNoReheat.get term.setConstantMinimumAirFlowFraction(mdp_adj) elsif equip.to_AirTerminalSingleDuctVAVReheat.is_initialized term = equip.to_AirTerminalSingleDuctVAVReheat.get term.setConstantMinimumAirFlowFraction(mdp_adj) end end num_zones_adj += 1 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Zone #{zone.name} has a ventilation effectiveness of #{e_vz.round(2)}. Increasing to #{e_vz_adj.round(2)} by increasing minimum damper position from #{mdp.round(2)} to #{mdp_adj.round(2)}.") else # Store the unadjusted value e_vzs_adj << e_vz end end # Min system zone ventilation effectiveness e_v = e_vzs.min # Total system outdoor intake flow rate v_ot = v_ou / e_v v_ot_cfm = OpenStudio.convert(v_ot, 'm^3/s', 'cfm').get # Min system zone ventilation effectiveness e_v_adj = e_vzs_adj.min # Total system outdoor intake flow rate v_ot_adj = v_ou / e_v_adj v_ot_adj_cfm = OpenStudio.convert(v_ot_adj, 'm^3/s', 'cfm').get # Report out the results of the multizone calculations if num_zones_adj > 0 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: the multizone outdoor air calculation method was applied. A simple summation of the zone outdoor air requirements gives a value of #{v_ou_cfm.round} cfm. Applying the multizone method gives a value of #{v_ot_cfm.round} cfm, with an original system ventilation effectiveness of #{e_v.round(2)}. After increasing the minimum damper position in #{num_zones_adj} critical zones, the resulting requirement is #{v_ot_adj_cfm.round} cfm with a system ventilation effectiveness of #{e_v_adj.round(2)}.") else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: the multizone outdoor air calculation method was applied. A simple summation of the zone requirements gives a value of #{v_ou_cfm.round} cfm. However, applying the multizone method requires #{v_ot_adj_cfm.round} cfm based on the ventilation effectiveness of the system.") end # Hard-size the sizing:system # object with the calculated min OA flow rate sizing_system = air_loop_hvac.sizingSystem sizing_system.setDesignOutdoorAirFlowRate(v_ot_adj) return true end |
#air_loop_hvac_adjust_minimum_vav_damper_positions_outpatient(air_loop_hvac) ⇒ Object
For critical zones of Outpatient, if the minimum airflow rate required by the accreditation standard (AIA 2001) is significantly less than the autosized peak design airflow in any of the three climate zones (Houston, Baltimore and Burlington), the minimum airflow fraction of the terminal units is reduced to the value: “required minimum airflow rate / autosized peak design flow” Reference: <Achieving the 30% Goal: Energy and Cost Savings Analysis of ASHRAE Standard 90.1-2010> Page109-111 For implementation purpose, since it is time-consuming to perform autosizing in three climate zones, just use the results of the current climate zone
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1669 def air_loop_hvac_adjust_minimum_vav_damper_positions_outpatient(air_loop_hvac) air_loop_hvac.model.getSpaces.sort.each do |space| zone = space.thermalZone.get sizing_zone = zone.sizingZone space_area = space.floorArea if sizing_zone.coolingDesignAirFlowMethod == 'DesignDay' next elsif sizing_zone.coolingDesignAirFlowMethod == 'DesignDayWithLimit' minimum_airflow_per_zone_floor_area = sizing_zone.coolingMinimumAirFlowperZoneFloorArea minimum_airflow_per_zone = minimum_airflow_per_zone_floor_area * space_area # get the autosized maximum air flow of the VAV terminal zone.equipment.each do |equip| if equip.to_AirTerminalSingleDuctVAVReheat.is_initialized vav_terminal = equip.to_AirTerminalSingleDuctVAVReheat.get rated_maximum_flow_rate = vav_terminal.autosizedMaximumAirFlowRate.get # compare the VAV autosized maximum airflow with the minimum airflow rate required by the accreditation standard ratio = minimum_airflow_per_zone / rated_maximum_flow_rate if ratio >= 0.95 vav_terminal.setConstantMinimumAirFlowFraction(1) elsif ratio < 0.95 vav_terminal.setConstantMinimumAirFlowFraction(ratio) end end end end end return true end |
#air_loop_hvac_allowable_system_brake_horsepower(air_loop_hvac) ⇒ Double
Determine the allowable fan system brake horsepower Per Table 6.5.3.1.1A
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 312 def air_loop_hvac_allowable_system_brake_horsepower(air_loop_hvac) # Get design supply air flow rate (whether autosized or hard-sized) dsn_air_flow_m3_per_s = 0 dsn_air_flow_cfm = 0 if air_loop_hvac.autosizedDesignSupplyAirFlowRate.is_initialized dsn_air_flow_m3_per_s = air_loop_hvac.autosizedDesignSupplyAirFlowRate.get dsn_air_flow_cfm = OpenStudio.convert(dsn_air_flow_m3_per_s, 'm^3/s', 'cfm').get OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "* #{dsn_air_flow_cfm.round} cfm = Autosized Design Supply Air Flow Rate.") else dsn_air_flow_m3_per_s = air_loop_hvac.designSupplyAirFlowRate.get dsn_air_flow_cfm = OpenStudio.convert(dsn_air_flow_m3_per_s, 'm^3/s', 'cfm').get OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "* #{dsn_air_flow_cfm.round} cfm = Hard sized Design Supply Air Flow Rate.") end # Get the fan limitation pressure drop adjustment bhp fan_pwr_adjustment_bhp = air_loop_hvac_fan_power_limitation_pressure_drop_adjustment_brake_horsepower(air_loop_hvac) # Determine the number of zones the system serves num_zones_served = air_loop_hvac.thermalZones.size # Get the supply air fan and determine whether VAV or CAV system. # Assume that supply air fan is fan closest to the demand outlet node. # The fan may be inside of a piece of unitary equipment. fan_pwr_limit_type = nil air_loop_hvac.supplyComponents.reverse.each do |comp| if comp.to_FanConstantVolume.is_initialized || comp.to_FanOnOff.is_initialized fan_pwr_limit_type = 'constant volume' elsif comp.to_FanVariableVolume.is_initialized fan_pwr_limit_type = 'variable volume' elsif comp.to_AirLoopHVACUnitaryHeatCoolVAVChangeoverBypass.is_initialized fan = comp.to_AirLoopHVACUnitaryHeatCoolVAVChangeoverBypass.get.supplyAirFan if fan.to_FanConstantVolume.is_initialized || comp.to_FanOnOff.is_initialized fan_pwr_limit_type = 'constant volume' elsif fan.to_FanVariableVolume.is_initialized fan_pwr_limit_type = 'variable volume' end elsif comp.to_AirLoopHVACUnitarySystem.is_initialized fan = comp.to_AirLoopHVACUnitarySystem.get.supplyFan if fan.to_FanConstantVolume.is_initialized || comp.to_FanOnOff.is_initialized fan_pwr_limit_type = 'constant volume' elsif fan.to_FanVariableVolume.is_initialized fan_pwr_limit_type = 'variable volume' end end end # For 90.1-2010, single-zone VAV systems use the # constant volume limitation per 6.5.3.1.1 if template == 'ASHRAE 90.1-2010' && fan_pwr_limit_type == 'variable volume' && num_zones_served == 1 fan_pwr_limit_type = 'constant volume' OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Using the constant volume limitation because single-zone VAV system.") end # Calculate the Allowable Fan System brake horsepower per Table G3.1.2.9 allowable_fan_bhp = 0 if fan_pwr_limit_type == 'constant volume' allowable_fan_bhp = dsn_air_flow_cfm * 0.00094 + fan_pwr_adjustment_bhp elsif fan_pwr_limit_type == 'variable volume' allowable_fan_bhp = dsn_air_flow_cfm * 0.0013 + fan_pwr_adjustment_bhp end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Allowable brake horsepower = #{allowable_fan_bhp.round(2)}HP based on #{dsn_air_flow_cfm.round} cfm and #{fan_pwr_adjustment_bhp.round(2)} bhp of adjustment.") # Calculate and report the total area for debugging/testing floor_area_served_m2 = air_loop_hvac_floor_area_served(air_loop_hvac) if floor_area_served_m2.zero? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "AirLoopHVAC #{air_loop_hvac.name} serves zero floor area. Check that it has thermal zones attached to it, and that they have non-zero floor area'.") return allowable_fan_bhp end floor_area_served_ft2 = OpenStudio.convert(floor_area_served_m2, 'm^2', 'ft^2').get cfm_per_ft2 = dsn_air_flow_cfm / floor_area_served_ft2 cfm_per_hp = dsn_air_flow_cfm / allowable_fan_bhp OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: area served = #{floor_area_served_ft2.round} ft^2.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: flow per area = #{cfm_per_ft2.round} cfm/ft^2.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: flow per hp = #{cfm_per_hp.round} cfm/hp.") return allowable_fan_bhp end |
#air_loop_hvac_apply_baseline_fan_pressure_rise(air_loop_hvac) ⇒ Object
Set the fan pressure rises that will result in the system hitting the baseline allowable fan power
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 475 def air_loop_hvac_apply_baseline_fan_pressure_rise(air_loop_hvac) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "#{air_loop_hvac.name}-Setting #{template} baseline fan power.") # Get the total system bhp from the proposed system, including terminal fans proposed_sys_bhp = air_loop_hvac_system_fan_brake_horsepower(air_loop_hvac, true) # Get the allowable fan brake horsepower allowable_fan_bhp = air_loop_hvac_allowable_system_brake_horsepower(air_loop_hvac) # Get the fan power limitation from proposed system fan_pwr_adjustment_bhp = air_loop_hvac_fan_power_limitation_pressure_drop_adjustment_brake_horsepower(air_loop_hvac) # Subtract the fan power adjustment allowable_fan_bhp -= fan_pwr_adjustment_bhp # Get all fans fans = air_loop_hvac_supply_return_exhaust_relief_fans(air_loop_hvac) # TODO: improve description # Loop through the fans, changing the pressure rise # until the fan bhp is the same percentage of the baseline allowable bhp # as it was on the proposed system. fans.each do |fan| # TODO: Yixing Check the model of the Fan Coil Unit next if fan.name.to_s.include?('Fan Coil fan') next if fan.name.to_s.include?('UnitHeater Fan') OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', fan.name.to_s) # Get the bhp of the fan on the proposed system proposed_fan_bhp = fan_brake_horsepower(fan) # Get the bhp of the fan on the proposed system proposed_fan_bhp_frac = proposed_fan_bhp / proposed_sys_bhp # Determine the target bhp of the fan on the baseline system baseline_fan_bhp = proposed_fan_bhp_frac * allowable_fan_bhp OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "* #{baseline_fan_bhp.round(1)} bhp = Baseline fan brake horsepower.") # Set the baseline impeller eff of the fan, # preserving the proposed motor eff. baseline_impeller_eff = fan_baseline_impeller_efficiency(fan) fan_change_impeller_efficiency(fan, baseline_impeller_eff) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "* #{(baseline_impeller_eff * 100).round(1)}% = Baseline fan impeller efficiency.") # Set the baseline motor efficiency for the specified bhp baseline_motor_eff = fan.standardMinimumMotorEfficiency(standards, allowable_fan_bhp) fan_change_motor_efficiency(fan, baseline_motor_eff) # Get design supply air flow rate (whether autosized or hard-sized) dsn_air_flow_m3_per_s = 0 if fan.autosizedDesignSupplyAirFlowRate.is_initialized dsn_air_flow_m3_per_s = fan.autosizedDesignSupplyAirFlowRate.get dsn_air_flow_cfm = OpenStudio.convert(dsn_air_flow_m3_per_s, 'm^3/s', 'cfm').get OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "* #{dsn_air_flow_cfm.round} cfm = Autosized Design Supply Air Flow Rate.") else dsn_air_flow_m3_per_s = fan.designSupplyAirFlowRate.get dsn_air_flow_cfm = OpenStudio.convert(dsn_air_flow_m3_per_s, 'm^3/s', 'cfm').get OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "* #{dsn_air_flow_cfm.round} cfm = User entered Design Supply Air Flow Rate.") end # Determine the fan pressure rise that will result in the target bhp # pressure_rise_pa = fan_bhp*746 / fan_motor_eff*fan_total_eff / dsn_air_flow_m3_per_s baseline_pressure_rise_pa = baseline_fan_bhp * 746 / fan.motorEfficiency * fan.fanEfficiency / dsn_air_flow_m3_per_s baseline_pressure_rise_in_wc = OpenStudio.convert(fan_pressure_rise_pa, 'Pa', 'inH_{2}O').get OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "* #{fan_pressure_rise_in_wc.round(2)} in w.c. = Pressure drop to achieve allowable fan power.") # Calculate the bhp of the fan to make sure it matches calc_bhp = fan_brake_horsepower(fan) if ((calc_bhp - baseline_fan_bhp) / baseline_fan_bhp).abs > 0.02 OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.AirLoopHVAC', "#{fan.name} baseline fan bhp supposed to be #{baseline_fan_bhp}, but is #{calc_bhp}.") end end # Calculate the total bhp of the system to make sure it matches the goal calc_sys_bhp = air_loop_hvac_system_fan_brake_horsepower(air_loop_hvac, false) if ((calc_sys_bhp - allowable_fan_bhp) / allowable_fan_bhp).abs > 0.02 OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.AirLoopHVAC', "#{air_loop_hvac.name} baseline system bhp supposed to be #{allowable_fan_bhp}, but is #{calc_sys_bhp}.") end end |
#air_loop_hvac_apply_economizer_integration(air_loop_hvac, climate_zone) ⇒ Bool
this method assumes you previously checked that an economizer is required at all via #economizer_required?
For systems required to have an economizer, set the economizer to integrated on non-integrated per the standard.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 896 def air_loop_hvac_apply_economizer_integration(air_loop_hvac, climate_zone) # Determine if an integrated economizer is required integrated_economizer_required = air_loop_hvac_integrated_economizer_required?(air_loop_hvac, climate_zone) # Get the OA system and OA controller oa_sys = air_loop_hvac.airLoopHVACOutdoorAirSystem if oa_sys.is_initialized oa_sys = oa_sys.get else return false # No OA system end oa_control = oa_sys.getControllerOutdoorAir # Apply integrated or non-integrated economizer if integrated_economizer_required oa_control.setLockoutType('NoLockout') else oa_control.setLockoutType('LockoutWithCompressor') end return true end |
#air_loop_hvac_apply_economizer_limits(air_loop_hvac, climate_zone) ⇒ Bool
Set the economizer limits per the standard. Limits are based on the economizer type currently specified in the ControllerOutdoorAir object on this air loop.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 766 def air_loop_hvac_apply_economizer_limits(air_loop_hvac, climate_zone) # EnergyPlus economizer types # 'NoEconomizer' # 'FixedDryBulb' # 'FixedEnthalpy' # 'DifferentialDryBulb' # 'DifferentialEnthalpy' # 'FixedDewPointAndDryBulb' # 'ElectronicEnthalpy' # 'DifferentialDryBulbAndEnthalpy' # Get the OA system and OA controller oa_sys = air_loop_hvac.airLoopHVACOutdoorAirSystem if oa_sys.is_initialized oa_sys = oa_sys.get else return false # No OA system end oa_control = oa_sys.getControllerOutdoorAir economizer_type = oa_control.getEconomizerControlType # Return false if no economizer is present if economizer_type == 'NoEconomizer' return false end # Reset the limits oa_control.resetEconomizerMaximumLimitDryBulbTemperature oa_control.resetEconomizerMaximumLimitEnthalpy oa_control.resetEconomizerMaximumLimitDewpointTemperature oa_control.resetEconomizerMinimumLimitDryBulbTemperature # Determine the limits drybulb_limit_f, enthalpy_limit_btu_per_lb, dewpoint_limit_f = air_loop_hvac_economizer_limits(air_loop_hvac, climate_zone) # Do nothing if no limits were specified if drybulb_limit_f.nil? && enthalpy_limit_btu_per_lb.nil? && dewpoint_limit_f.nil? return false end # Set the limits case economizer_type when 'FixedDryBulb' if drybulb_limit_f drybulb_limit_c = OpenStudio.convert(drybulb_limit_f, 'F', 'C').get oa_control.setEconomizerMaximumLimitDryBulbTemperature(drybulb_limit_c) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Economizer type = #{economizer_type}, dry bulb limit = #{drybulb_limit_f}F") end when 'FixedEnthalpy' if enthalpy_limit_btu_per_lb enthalpy_limit_j_per_kg = OpenStudio.convert(enthalpy_limit_btu_per_lb, 'Btu/lb', 'J/kg').get oa_control.setEconomizerMaximumLimitEnthalpy(enthalpy_limit_j_per_kg) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Economizer type = #{economizer_type}, enthalpy limit = #{enthalpy_limit_btu_per_lb}Btu/lb") end when 'FixedDewPointAndDryBulb' if drybulb_limit_f && dewpoint_limit_f drybulb_limit_c = OpenStudio.convert(drybulb_limit_f, 'F', 'C').get dewpoint_limit_c = OpenStudio.convert(dewpoint_limit_f, 'F', 'C').get oa_control.setEconomizerMaximumLimitDryBulbTemperature(drybulb_limit_c) oa_control.setEconomizerMaximumLimitDewpointTemperature(dewpoint_limit_c) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Economizer type = #{economizer_type}, dry bulb limit = #{drybulb_limit_f}F, dew-point limit = #{dewpoint_limit_f}F") end end return true end |
#air_loop_hvac_apply_energy_recovery_ventilator(air_loop_hvac) ⇒ Bool
Add exception logic for systems serving parking garage, warehouse, or multifamily
Add an ERV to this airloop. Will be a rotary-type HX
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1314 def air_loop_hvac_apply_energy_recovery_ventilator(air_loop_hvac) # Get the oa system oa_system = nil if air_loop_hvac.airLoopHVACOutdoorAirSystem.is_initialized oa_system = air_loop_hvac.airLoopHVACOutdoorAirSystem.get else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}, ERV cannot be added because the system has no OA intake.") return false end # Create an ERV erv = OpenStudio::Model::HeatExchangerAirToAirSensibleAndLatent.new(air_loop_hvac.model) erv.setName("#{air_loop_hvac.name} ERV") erv.setSensibleEffectivenessat100HeatingAirFlow(0.7) erv.setLatentEffectivenessat100HeatingAirFlow(0.6) erv.setSensibleEffectivenessat75HeatingAirFlow(0.7) erv.setLatentEffectivenessat75HeatingAirFlow(0.6) erv.setSensibleEffectivenessat100CoolingAirFlow(0.75) erv.setLatentEffectivenessat100CoolingAirFlow(0.6) erv.setSensibleEffectivenessat75CoolingAirFlow(0.75) erv.setLatentEffectivenessat75CoolingAirFlow(0.6) erv.setSupplyAirOutletTemperatureControl(true) erv.setHeatExchangerType('Rotary') erv.setFrostControlType('ExhaustOnly') erv.setEconomizerLockout(true) erv.setThresholdTemperature(-23.3) # -10F erv.setInitialDefrostTimeFraction(0.167) erv.setRateofDefrostTimeFractionIncrease(1.44) # Add the ERV to the OA system erv.addToNode(oa_system.outboardOANode.get) # Add a setpoint manager OA pretreat # to control the ERV spm_oa_pretreat = OpenStudio::Model::SetpointManagerOutdoorAirPretreat.new(air_loop_hvac.model) spm_oa_pretreat.setMinimumSetpointTemperature(-99.0) spm_oa_pretreat.setMaximumSetpointTemperature(99.0) spm_oa_pretreat.setMinimumSetpointHumidityRatio(0.00001) spm_oa_pretreat.setMaximumSetpointHumidityRatio(1.0) # Reference setpoint node and # Mixed air stream node are outlet # node of the OA system mixed_air_node = oa_system.mixedAirModelObject.get.to_Node.get spm_oa_pretreat.setReferenceSetpointNode(mixed_air_node) spm_oa_pretreat.setMixedAirStreamNode(mixed_air_node) # Outdoor air node is # the outboard OA node of teh OA system spm_oa_pretreat.setOutdoorAirStreamNode(oa_system.outboardOANode.get) # Return air node is the inlet # node of the OA system return_air_node = oa_system.returnAirModelObject.get.to_Node.get spm_oa_pretreat.setReturnAirStreamNode(return_air_node) # Attach to the outlet of the ERV erv_outlet = erv.primaryAirOutletModelObject.get.to_Node.get spm_oa_pretreat.addToNode(erv_outlet) # Apply the prototype Heat Exchanger power assumptions. heat_exchanger_air_to_air_sensible_and_latent_apply_prototype_nominal_electric_power(erv) # Determine if the system is a DOAS based on # whether there is 100% OA in heating and cooling sizing. is_doas = false sizing_system = air_loop_hvac.sizingSystem if sizing_system.allOutdoorAirinCooling && sizing_system.allOutdoorAirinHeating is_doas = true end # Set the bypass control type # If DOAS system, BypassWhenWithinEconomizerLimits # to disable ERV during economizing. # Otherwise, BypassWhenOAFlowGreaterThanMinimum # to disable ERV during economizing and when OA # is also greater than minimum. bypass_ctrl_type = if is_doas 'BypassWhenWithinEconomizerLimits' else 'BypassWhenOAFlowGreaterThanMinimum' end oa_system.getControllerOutdoorAir.setHeatRecoveryBypassControlType(bypass_ctrl_type) return true end |
#air_loop_hvac_apply_maximum_reheat_temperature(air_loop_hvac, max_reheat_c) ⇒ Bool
Sets the maximum reheat temperature to the specified value for all reheat terminals (of any type) on the loop.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 3037 def air_loop_hvac_apply_maximum_reheat_temperature(air_loop_hvac, max_reheat_c) air_loop_hvac.demandComponents.each do |sc| if sc.to_AirTerminalSingleDuctConstantVolumeReheat.is_initialized term = sc.to_AirTerminalSingleDuctConstantVolumeReheat.get term.setMaximumReheatAirTemperature(max_reheat_c) elsif sc.to_AirTerminalSingleDuctParallelPIUReheat.is_initialized # No control option available elsif sc.to_AirTerminalSingleDuctSeriesPIUReheat.is_initialized # No control option available elsif sc.to_AirTerminalSingleDuctVAVHeatAndCoolReheat.is_initialized term = sc.to_AirTerminalSingleDuctVAVHeatAndCoolReheat.get term.setMaximumReheatAirTemperature(max_reheat_c) elsif sc.to_AirTerminalSingleDuctVAVReheat.is_initialized term = sc.to_AirTerminalSingleDuctVAVReheat.get term.setMaximumReheatAirTemperature(max_reheat_c) end end max_reheat_f = OpenStudio.convert(max_reheat_c, 'C', 'F').get OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: reheat terminal maximum set to #{max_reheat_f.round} F.") return true end |
#air_loop_hvac_apply_minimum_vav_damper_positions(air_loop_hvac, has_ddc = true) ⇒ Bool
Set the minimum VAV damper positions.
is DDC control of vav terminals. If false, assumes otherwise.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1454 def air_loop_hvac_apply_minimum_vav_damper_positions(air_loop_hvac, has_ddc = true) air_loop_hvac.thermalZones.each do |zone| zone.equipment.each do |equip| if equip.to_AirTerminalSingleDuctVAVReheat.is_initialized zone_oa = thermal_zone_outdoor_airflow_rate(zone) vav_terminal = equip.to_AirTerminalSingleDuctVAVReheat.get air_terminal_single_duct_vav_reheat_apply_minimum_damper_position(vav_terminal, zone_oa, has_ddc) end end end return true end |
#air_loop_hvac_apply_multizone_vav_outdoor_air_sizing(air_loop_hvac) ⇒ Object
move building-type-specific code to Prototype classes
Apply multizone vav outdoor air method and adjust multizone VAV damper positions to achieve a system minimum ventilation effectiveness of 0.6 per PNNL. Hard-size the resulting min OA into the sizing:system object.
return [Bool] returns true if successful, false if not
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 13 def air_loop_hvac_apply_multizone_vav_outdoor_air_sizing(air_loop_hvac) # First time adjustment: # Only applies to multi-zone vav systems # exclusion: for Outpatient: (1) both AHU1 and AHU2 in 'DOE Ref Pre-1980' and 'DOE Ref 1980-2004' # (2) AHU1 in 2004-2013 # TODO refactor: move building-type-specific code to Prototype classes if air_loop_hvac_multizone_vav_system?(air_loop_hvac) && !(air_loop_hvac.name.to_s.include? 'Outpatient F1') air_loop_hvac_adjust_minimum_vav_damper_positions(air_loop_hvac) end return true end |
#air_loop_hvac_apply_prm_baseline_controls(air_loop_hvac, climate_zone) ⇒ Bool
Apply all PRM baseline required controls to the airloop. Only applies those controls that differ from the normal prescriptive controls, which are added via air_loop_hvac_apply_standard_controls(AirLoopHVAC)
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 187 def air_loop_hvac_apply_prm_baseline_controls(air_loop_hvac, climate_zone) # Economizers if air_loop_hvac_prm_baseline_economizer_required?(air_loop_hvac, climate_zone) air_loop_hvac_apply_prm_baseline_economizer(air_loop_hvac, climate_zone) end # Multizone VAV Systems if air_loop_hvac_multizone_vav_system?(air_loop_hvac) # VSD no Static Pressure Reset on all VAV systems # per G3.1.3.15 air_loop_hvac_supply_return_exhaust_relief_fans(air_loop_hvac).each do |fan| if fan.to_FanVariableVolume.is_initialized OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Setting fan part load curve per G3.1.3.15.") fan_variable_volume_set_control_type(fan, 'Multi Zone VAV with VSD and Fixed SP Setpoint') end end # SAT Reset # G3.1.3.12 SAT reset required for all Multizone VAV systems, # even if not required by prescriptive section. air_loop_hvac_enable_supply_air_temperature_reset_warmest_zone(air_loop_hvac) end # Unoccupied shutdown air_loop_hvac_enable_unoccupied_fan_shutoff(air_loop_hvac) return true end |
#air_loop_hvac_apply_prm_baseline_economizer(air_loop_hvac, climate_zone) ⇒ Bool
Apply the PRM economizer type and set temperature limits
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1027 def air_loop_hvac_apply_prm_baseline_economizer(air_loop_hvac, climate_zone) # EnergyPlus economizer types # 'NoEconomizer' # 'FixedDryBulb' # 'FixedEnthalpy' # 'DifferentialDryBulb' # 'DifferentialEnthalpy' # 'FixedDewPointAndDryBulb' # 'ElectronicEnthalpy' # 'DifferentialDryBulbAndEnthalpy' # Determine the type and limits economizer_type, drybulb_limit_f, enthalpy_limit_btu_per_lb, dewpoint_limit_f = air_loop_hvac_prm_economizer_type_and_limits(air_loop_hvac, climate_zone) # Get the OA system and OA controller oa_sys = air_loop_hvac.airLoopHVACOutdoorAirSystem if oa_sys.is_initialized oa_sys = oa_sys.get else return false # No OA system end oa_control = oa_sys.getControllerOutdoorAir # Set the economizer type oa_control.setEconomizerControlType(economizer_type) # Reset the limits oa_control.resetEconomizerMaximumLimitDryBulbTemperature oa_control.resetEconomizerMaximumLimitEnthalpy oa_control.resetEconomizerMaximumLimitDewpointTemperature oa_control.resetEconomizerMinimumLimitDryBulbTemperature # Set the limits case economizer_type when 'FixedDryBulb' if drybulb_limit_f drybulb_limit_c = OpenStudio.convert(drybulb_limit_f, 'F', 'C').get oa_control.setEconomizerMaximumLimitDryBulbTemperature(drybulb_limit_c) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Economizer type = #{economizer_type}, dry bulb limit = #{drybulb_limit_f}F") end when 'FixedEnthalpy' if enthalpy_limit_btu_per_lb enthalpy_limit_j_per_kg = OpenStudio.convert(enthalpy_limit_btu_per_lb, 'Btu/lb', 'J/kg').get oa_control.setEconomizerMaximumLimitEnthalpy(enthalpy_limit_j_per_kg) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Economizer type = #{economizer_type}, enthalpy limit = #{enthalpy_limit_btu_per_lb}Btu/lb") end when 'FixedDewPointAndDryBulb' if drybulb_limit_f && dewpoint_limit_f drybulb_limit_c = OpenStudio.convert(drybulb_limit_f, 'F', 'C').get dewpoint_limit_c = OpenStudio.convert(dewpoint_limit_f, 'F', 'C').get oa_control.setEconomizerMaximumLimitDryBulbTemperature(drybulb_limit_c) oa_control.setEconomizerMaximumLimitDewpointTemperature(dewpoint_limit_c) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Economizer type = #{economizer_type}, dry bulb limit = #{drybulb_limit_f}F, dew-point limit = #{dewpoint_limit_f}F") end end return true end |
#air_loop_hvac_apply_prm_baseline_fan_power(air_loop_hvac) ⇒ Object
Figure out how to split fan power between multiple fans
Calculate and apply the performance rating method baseline fan power to this air loop. Fan motor efficiency will be set, and then fan pressure rise adjusted so that the fan power is the maximum allowable. Also adjusts the fan power and flow rates of any parallel PIU terminals on the system.
if the proposed model had multiple fans (supply, return, exhaust, etc.) return [Bool] true if successful, false if not.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 229 def air_loop_hvac_apply_prm_baseline_fan_power(air_loop_hvac) # Main AHU fans # Calculate the allowable fan motor bhp # for the entire airloop. allowable_fan_bhp = air_loop_hvac_allowable_system_brake_horsepower(air_loop_hvac) # Divide the allowable power evenly between the fans # on this airloop. all_fans = air_loop_hvac_supply_return_exhaust_relief_fans(air_loop_hvac) allowable_fan_bhp /= all_fans.size # Set the motor efficiencies # for all fans based on the calculated # allowed brake hp. Then calculate the allowable # fan power for each fan and adjust # the fan pressure rise accordingly all_fans.each do |fan| fan_apply_standard_minimum_motor_efficiency(fan, allowable_fan_bhp) allowable_power_w = allowable_fan_bhp * 746 / fan.motorEfficiency fan_adjust_pressure_rise_to_meet_fan_power(fan, allowable_power_w) end # Fan powered terminal fans # Adjust each terminal fan air_loop_hvac.demandComponents.each do |dc| next if dc.to_AirTerminalSingleDuctParallelPIUReheat.empty? pfp_term = dc.to_AirTerminalSingleDuctParallelPIUReheat.get air_terminal_single_duct_parallel_piu_reheat_apply_prm_baseline_fan_power(pfp_term) end return true end |
#air_loop_hvac_apply_prm_sizing_temperatures(air_loop_hvac) ⇒ Bool
Set the system sizing properties based on the zone sizing information
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 3064 def air_loop_hvac_apply_prm_sizing_temperatures(air_loop_hvac) # Get the design heating and cooling SAT information # for all zones served by the system. htg_setpts_c = [] clg_setpts_c = [] air_loop_hvac.thermalZones.each do |zone| sizing_zone = zone.sizingZone htg_setpts_c << sizing_zone.zoneHeatingDesignSupplyAirTemperature clg_setpts_c << sizing_zone.zoneCoolingDesignSupplyAirTemperature end # Cooling SAT set to minimum zone cooling design SAT clg_sat_c = clg_setpts_c.min # If the system has terminal reheat, # heating SAT is set to the same value as cooling SAT # and the terminals are expected to do the heating. # If not, heating SAT set to maximum zone heating design SAT. has_term_rht = air_loop_hvac_terminal_reheat?(air_loop_hvac) htg_sat_c = if has_term_rht clg_sat_c else htg_setpts_c.max end # Set the central SAT values sizing_system = air_loop_hvac.sizingSystem sizing_system.setCentralCoolingDesignSupplyAirTemperature(clg_sat_c) sizing_system.setCentralHeatingDesignSupplyAirTemperature(htg_sat_c) clg_sat_f = OpenStudio.convert(clg_sat_c, 'C', 'F').get htg_sat_f = OpenStudio.convert(htg_sat_c, 'C', 'F').get OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: central heating SAT set to #{htg_sat_f.round} F, cooling SAT set to #{clg_sat_f.round} F.") # If it's a terminal reheat system, set the reheat terminal setpoints too if has_term_rht rht_c = htg_setpts_c.max air_loop_hvac_apply_maximum_reheat_temperature(air_loop_hvac, rht_c) end return true end |
#air_loop_hvac_apply_single_zone_controls(air_loop_hvac, climate_zone) ⇒ Bool
Generate the EMS used to implement the economizer and staging controls for packaged single zone units.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2481 def air_loop_hvac_apply_single_zone_controls(air_loop_hvac, climate_zone) # These controls only apply to systems with DX cooling unless air_loop_hvac_dx_cooling?(air_loop_hvac) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Single zone controls not applicable because no DX cooling.") return true end # Number of stages is determined by the template num_stages = air_loop_hvac_single_zone_controls_num_stages(air_loop_hvac, climate_zone) # If zero stages, no special control is required if num_stages.zero? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: No special economizer controls were modeled.") return true end # Fan control program only used for systems with two-stage DX coils fan_control = if air_loop_hvac_multi_stage_dx_cooling?(air_loop_hvac) true else false end # Scrub special characters from the system name sn = air_loop_hvac.name.get.to_s snc = sn.gsub(/\W/, '').delete('_') # If the name starts with a number, prepend with a letter if snc[0] =~ /[0-9]/ snc = "SYS#{snc}" end # Get the zone name zone = air_loop_hvac.thermalZones[0] zone_name = zone.name.get.to_s zn_name_clean = zone_name.gsub(/\W/, '_') # Zone air node zone_air_node = zone.zoneAirNode # Get the OA system and OA controller oa_sys = air_loop_hvac.airLoopHVACOutdoorAirSystem if oa_sys.is_initialized oa_sys = oa_sys.get else return false # No OA system end oa_control = oa_sys.getControllerOutdoorAir oa_node = oa_sys.outboardOANode.get # Get the name of the min oa schedule min_oa_sch = if oa_control.minimumOutdoorAirSchedule.is_initialized oa_control.minimumOutdoorAirSchedule.get else air_loop_hvac.model.alwaysOnDiscreteSchedule end # Get the supply fan if air_loop_hvac.supplyFan.empty? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: No supply fan found, cannot apply DX fan/economizer control.") return false end fan = air_loop_hvac.supplyFan.get # Supply outlet node sup_out_node = air_loop_hvac.supplyOutletNode # DX Cooling Coil dx_coil = nil air_loop_hvac.supplyComponents.each do |equip| if equip.to_CoilCoolingDXSingleSpeed.is_initialized dx_coil = equip.to_CoilCoolingDXSingleSpeed.get elsif equip.to_CoilCoolingDXTwoSpeed.is_initialized dx_coil = equip.to_CoilCoolingDXTwoSpeed.get end end if dx_coil.nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: No DX cooling coil found, cannot apply DX fan/economizer control.") return false end # Heating Coil htg_coil = nil air_loop_hvac.supplyComponents.each do |equip| if equip.to_CoilHeatingGas.is_initialized htg_coil = equip.to_CoilHeatingGas.get elsif equip.to_CoilHeatingElectric.is_initialized OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: electric heating coil was found, cannot apply DX fan/economizer control.") return false elsif equip.to_CoilHeatingWater.is_initialized OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: hot water heating coil was found found, cannot apply DX fan/economizer control.") return false end end if htg_coil.nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: No heating coil found, cannot apply DX fan/economizer control.") return false end # Create an economizer maximum OA fraction schedule with # a maximum of 70% to reflect damper leakage per PNNL max_oa_sch_name = "#{snc}maxOASch" max_oa_sch = OpenStudio::Model::ScheduleRuleset.new(air_loop_hvac.model) max_oa_sch.setName(max_oa_sch_name) max_oa_sch.defaultDaySchedule.setName("#{max_oa_sch_name}Default") max_oa_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0.7) oa_control.setMaximumFractionofOutdoorAirSchedule(max_oa_sch) ### EMS shared by both programs ### # Sensors oat_db_c_sen = OpenStudio::Model::EnergyManagementSystemSensor.new(air_loop_hvac.model, 'Site Outdoor Air Drybulb Temperature') oat_db_c_sen.setName('OATF') oat_db_c_sen.setKeyName('Environment') oat_wb_c_sen = OpenStudio::Model::EnergyManagementSystemSensor.new(air_loop_hvac.model, 'Site Outdoor Air Wetbulb Temperature') oat_wb_c_sen.setName('OAWBC') oat_wb_c_sen.setKeyName('Environment') oa_sch_sen = OpenStudio::Model::EnergyManagementSystemSensor.new(air_loop_hvac.model, 'Schedule Value') oa_sch_sen.setName("#{snc}OASch") oa_sch_sen.setKeyName(min_oa_sch.handle.to_s) oa_flow_sen = OpenStudio::Model::EnergyManagementSystemSensor.new(air_loop_hvac.model, 'System Node Mass Flow Rate') oa_flow_sen.setName("#{snc}OAFlowMass") oa_flow_sen.setKeyName(oa_node.handle.to_s) dat_sen = OpenStudio::Model::EnergyManagementSystemSensor.new(air_loop_hvac.model, 'System Node Setpoint Temperature') dat_sen.setName("#{snc}DATRqd") dat_sen.setKeyName(sup_out_node.handle.to_s) # Internal Variables oa_flow_var = OpenStudio::Model::EnergyManagementSystemInternalVariable.new(air_loop_hvac.model, 'Outdoor Air Controller Minimum Mass Flow Rate') oa_flow_var.setName("#{snc}OADesignMass") oa_flow_var.setInternalDataIndexKeyName(oa_control.handle.to_s) # Global Variables gvar = OpenStudio::Model::EnergyManagementSystemGlobalVariable.new(air_loop_hvac.model, "#{snc}NumberofStages") # Programs num_stg_prg = OpenStudio::Model::EnergyManagementSystemProgram.new(air_loop_hvac.model) num_stg_prg.setName("#{snc}SetNumberofStages") num_stg_prg_body = <<-EMS SET #{snc}NumberofStages = #{num_stages} EMS num_stg_prg.setBody(num_stg_prg_body) # Program Calling Managers setup_mgr = OpenStudio::Model::EnergyManagementSystemProgramCallingManager.new(air_loop_hvac.model) setup_mgr.setName("#{snc}SetNumberofStagesCallingManager") setup_mgr.setCallingPoint('BeginNewEnvironment') setup_mgr.addProgram(num_stg_prg) ### Economizer Control ### # Actuators econ_eff_act = OpenStudio::Model::EnergyManagementSystemActuator.new(max_oa_sch, 'Schedule:Year', 'Schedule Value') econ_eff_act.setName("#{snc}TimestepEconEff") # Programs econ_prg = OpenStudio::Model::EnergyManagementSystemProgram.new(air_loop_hvac.model) econ_prg.setName("#{snc}EconomizerCTRLProg") econ_prg_body = <<-EMS SET #{econ_eff_act.handle} = 0.7 SET MaxE = 0.7 SET #{dat_sen.handle} = (#{dat_sen.handle}*1.8)+32 SET OATF = (#{oat_db_c_sen.handle}*1.8)+32 SET OAwbF = (#{oat_wb_c_sen.handle}*1.8)+32 IF #{oa_flow_sen.handle} > (#{oa_flow_var.handle}*#{oa_sch_sen.handle}) SET EconoActive = 1 ELSE SET EconoActive = 0 ENDIF SET dTNeeded = 75-#{dat_sen.handle} SET CoolDesdT = ((98*0.15)+(75*(1-0.15)))-55 SET CoolLoad = dTNeeded/ CoolDesdT IF CoolLoad > 1 SET CoolLoad = 1 ELSEIF CoolLoad < 0 SET CoolLoad = 0 ENDIF IF EconoActive == 1 SET Stage = #{snc}NumberofStages IF Stage == 2 IF CoolLoad < 0.6 SET #{econ_eff_act.handle} = MaxE ELSE SET ECOEff = 0-2.18919863612305 SET ECOEff = ECOEff+(0-0.674461284910428*CoolLoad) SET ECOEff = ECOEff+(0.000459106275872404*(OATF^2)) SET ECOEff = ECOEff+(0-0.00000484778537945252*(OATF^3)) SET ECOEff = ECOEff+(0.182915713033586*OAwbF) SET ECOEff = ECOEff+(0-0.00382838660261133*(OAwbF^2)) SET ECOEff = ECOEff+(0.0000255567460240583*(OAwbF^3)) SET #{econ_eff_act.handle} = ECOEff ENDIF ELSE SET ECOEff = 2.36337942464462 SET ECOEff = ECOEff+(0-0.409939515512619*CoolLoad) SET ECOEff = ECOEff+(0-0.0565205596792225*OAwbF) SET ECOEff = ECOEff+(0-0.0000632612294169389*(OATF^2)) SET #{econ_eff_act.handle} = ECOEff+(0.000571724868775081*(OAwbF^2)) ENDIF IF #{econ_eff_act.handle} > MaxE SET #{econ_eff_act.handle} = MaxE ELSEIF #{econ_eff_act.handle} < (#{oa_flow_var.handle}*#{oa_sch_sen.handle}) SET #{econ_eff_act.handle} = (#{oa_flow_var.handle}*#{oa_sch_sen.handle}) ENDIF ENDIF EMS econ_prg.setBody(econ_prg_body) # Program Calling Managers econ_mgr = OpenStudio::Model::EnergyManagementSystemProgramCallingManager.new(air_loop_hvac.model) econ_mgr.setName("#{snc}EcoManager") econ_mgr.setCallingPoint('InsideHVACSystemIterationLoop') econ_mgr.addProgram(econ_prg) ### Fan Control ### if fan_control # Sensors zn_temp_sen = OpenStudio::Model::EnergyManagementSystemSensor.new(air_loop_hvac.model, 'System Node Temperature') zn_temp_sen.setName("#{zn_name_clean}Temp") zn_temp_sen.setKeyName(zone_air_node.handle.to_s) htg_rtf_sen = OpenStudio::Model::EnergyManagementSystemSensor.new(air_loop_hvac.model, 'Heating Coil Runtime Fraction') htg_rtf_sen.setName("#{snc}HeatingRTF") htg_rtf_sen.setKeyName(htg_coil.handle.to_s) clg_rtf_sen = OpenStudio::Model::EnergyManagementSystemSensor.new(air_loop_hvac.model, 'Cooling Coil Runtime Fraction') clg_rtf_sen.setName("#{snc}RTF") clg_rtf_sen.setKeyName(dx_coil.handle.to_s) spd_sen = OpenStudio::Model::EnergyManagementSystemSensor.new(air_loop_hvac.model, 'Coil System Compressor Speed Ratio') spd_sen.setName("#{snc}SpeedRatio") spd_sen.setKeyName("#{dx_coil.handle} CoilSystem") # Internal Variables fan_pres_var = OpenStudio::Model::EnergyManagementSystemInternalVariable.new(air_loop_hvac.model, 'Fan Nominal Pressure Rise') fan_pres_var.setName("#{snc}FanDesignPressure") fan_pres_var.setInternalDataIndexKeyName(fan.handle.to_s) dsn_flow_var = OpenStudio::Model::EnergyManagementSystemInternalVariable.new(air_loop_hvac.model, 'Outdoor Air Controller Maximum Mass Flow Rate') dsn_flow_var.setName("#{snc}DesignFlowMass") dsn_flow_var.setInternalDataIndexKeyName(oa_control.handle.to_s) # Actuators fan_pres_act = OpenStudio::Model::EnergyManagementSystemActuator.new(fan, 'Fan', 'Fan Pressure Rise') fan_pres_act.setName("#{snc}FanPressure") # Global Variables gvar = OpenStudio::Model::EnergyManagementSystemGlobalVariable.new(air_loop_hvac.model, "#{snc}FanPwrExp") gvar = OpenStudio::Model::EnergyManagementSystemGlobalVariable.new(air_loop_hvac.model, "#{snc}Stg1Spd") gvar = OpenStudio::Model::EnergyManagementSystemGlobalVariable.new(air_loop_hvac.model, "#{snc}Stg2Spd") gvar = OpenStudio::Model::EnergyManagementSystemGlobalVariable.new(air_loop_hvac.model, "#{snc}HeatSpeed") gvar = OpenStudio::Model::EnergyManagementSystemGlobalVariable.new(air_loop_hvac.model, "#{snc}VenSpeed") # Programs fan_par_prg = OpenStudio::Model::EnergyManagementSystemProgram.new(air_loop_hvac.model) fan_par_prg.setName("#{snc}SetFanPar") fan_par_prg_body = <<-EMS IF #{snc}NumberofStages == 1 Return ENDIF SET #{snc}FanPwrExp = 2.2 SET OAFrac = #{oa_flow_sen.handle}/#{dsn_flow_var.handle} IF OAFrac < 0.66 SET #{snc}VenSpeed = 0.66 SET #{snc}Stg1Spd = 0.66 ELSE SET #{snc}VenSpeed = OAFrac SET #{snc}Stg1Spd = OAFrac ENDIF SET #{snc}Stg2Spd = 1.0 SET #{snc}HeatSpeed = 1.0 EMS fan_par_prg.setBody(fan_par_prg_body) fan_ctrl_prg = OpenStudio::Model::EnergyManagementSystemProgram.new(air_loop_hvac.model) fan_ctrl_prg.setName("#{snc}FanControl") fan_ctrl_prg_body = <<-EMS IF #{snc}NumberofStages == 1 Return ENDIF IF #{htg_rtf_sen.handle} > 0 SET Heating = #{htg_rtf_sen.handle} SET Ven = 1-#{htg_rtf_sen.handle} SET Eco = 0 SET Stage1 = 0 SET Stage2 = 0 ELSE SET Heating = 0 SET EcoSpeed = #{snc}VenSpeed IF #{spd_sen.handle} == 0 IF #{clg_rtf_sen.handle} > 0 SET Stage1 = #{clg_rtf_sen.handle} SET Stage2 = 0 SET Ven = 1-#{clg_rtf_sen.handle} SET Eco = 0 IF #{oa_flow_sen.handle} > (#{oa_flow_var.handle}*#{oa_sch_sen.handle}) SET #{snc}Stg1Spd = 1.0 ENDIF ELSE SET Stage1 = 0 SET Stage2 = 0 IF #{oa_flow_sen.handle} > (#{oa_flow_var.handle}*#{oa_sch_sen.handle}) SET Eco = 1.0 SET Ven = 0 !Calculate the expected discharge air temperature if the system runs at its low speed SET ExpDAT = #{dat_sen.handle}-(1-#{snc}VenSpeed)*#{zn_temp_sen.handle} SET ExpDAT = ExpDAT/#{snc}VenSpeed IF #{oat_db_c_sen.handle} > ExpDAT SET EcoSpeed = #{snc}Stg2Spd ENDIF ELSE SET Eco = 0 SET Ven = 1.0 ENDIF ENDIF ELSE SET Stage1 = 1-#{spd_sen.handle} SET Stage2 = #{spd_sen.handle} SET Ven = 0 SET Eco = 0 IF #{oa_flow_sen.handle} > (#{oa_flow_var.handle}*#{oa_sch_sen.handle}) SET #{snc}Stg1Spd = 1.0 ENDIF ENDIF ENDIF ! For each mode (percent time in mode)*(fanSpeer^PwrExp) is the contribution to weighted fan power over time step SET FPR = Ven*(#{snc}VenSpeed ^ #{snc}FanPwrExp) SET FPR = FPR+Eco*(EcoSpeed^#{snc}FanPwrExp) SET FPR1 = Stage1*(#{snc}Stg1Spd^#{snc}FanPwrExp) SET FPR = FPR+FPR1 SET FPR2 = Stage2*(#{snc}Stg2Spd^#{snc}FanPwrExp) SET FPR = FPR+FPR2 SET FPR3 = Heating*(#{snc}HeatSpeed^#{snc}FanPwrExp) SET FanPwrRatio = FPR+ FPR3 ! system fan power is directly proportional to static pressure so this change linearly adjusts fan energy for speed control SET #{fan_pres_act.handle} = #{fan_pres_var.handle}*FanPwrRatio EMS fan_ctrl_prg.setBody(fan_ctrl_prg_body) # Program Calling Managers # Note that num_stg_prg must be listed before fan_par_prg # because it initializes a variable used by fan_par_prg. setup_mgr.addProgram(fan_par_prg) fan_ctrl_mgr = OpenStudio::Model::EnergyManagementSystemProgramCallingManager.new(air_loop_hvac.model) fan_ctrl_mgr.setName("#{snc}FanMainManager") fan_ctrl_mgr.setCallingPoint('BeginTimestepBeforePredictor') fan_ctrl_mgr.addProgram(fan_ctrl_prg) end return true end |
#air_loop_hvac_apply_standard_controls(air_loop_hvac, climate_zone) ⇒ Bool
optimum start
night damper shutoff
nightcycle control
night fan shutoff
Apply all standard required controls to the airloop
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 34 def air_loop_hvac_apply_standard_controls(air_loop_hvac, climate_zone) # Energy Recovery Ventilation if air_loop_hvac_energy_recovery_ventilator_required?(air_loop_hvac, climate_zone) air_loop_hvac_apply_energy_recovery_ventilator(air_loop_hvac) end # Economizers air_loop_hvac_apply_economizer_limits(air_loop_hvac, climate_zone) air_loop_hvac_apply_economizer_integration(air_loop_hvac, climate_zone) # Multizone VAV Systems if air_loop_hvac_multizone_vav_system?(air_loop_hvac) # VAV Reheat Control air_loop_hvac_apply_vav_damper_action(air_loop_hvac) # Multizone VAV Optimization # This rule does not apply to two hospital and one outpatient systems (TODO add hospital two systems as exception) unless air_loop_hvac.name.to_s.include? 'Outpatient F1' if air_loop_hvac_multizone_vav_optimization_required?(air_loop_hvac, climate_zone) air_loop_hvac_enable_multizone_vav_optimization(air_loop_hvac) else air_loop_hvac_disable_multizone_vav_optimization(air_loop_hvac) end end # Static Pressure Reset # Per 5.2.2.16 (Halverson et al 2014), all multiple zone VAV systems are assumed to have DDC for all years of DOE 90.1 prototypes, so the has_ddc is not used any more. air_loop_hvac_supply_return_exhaust_relief_fans(air_loop_hvac).each do |fan| if fan.to_FanVariableVolume.is_initialized plr_req = fan_variable_volume_part_load_fan_power_limitation?(fan) # Part Load Fan Pressure Control if plr_req fan_variable_volume_set_control_type(fan, 'Multi Zone VAV with VSD and SP Setpoint Reset') # No Part Load Fan Pressure Control else fan_variable_volume_set_control_type(fan, 'Multi Zone VAV with discharge dampers') end else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{fan}: This is not a multizone VAV fan system.") end end ## # Static Pressure Reset ## # assume no systems have DDC control of VAV terminals ## has_ddc = false ## spr_req = air_loop_hvac_static_pressure_reset_required?(air_loop_hvac, template, has_ddc) ## air_loop_hvac_supply_return_exhaust_relief_fans(air_loop_hvac).each do |fan| ## if fan.to_FanVariableVolume.is_initialized ## plr_req = fan_variable_volume_part_load_fan_power_limitation?(fan, template) ## # Part Load Fan Pressure Control & Static Pressure Reset ## if plr_req && spr_req ## fan_variable_volume_set_control_type(fan, 'Multi Zone VAV with VSD and Static Pressure Reset') ## # Part Load Fan Pressure Control only ## elsif plr_req && !spr_req ## fan_variable_volume_set_control_type(fan, 'Multi Zone VAV with VSD and Fixed SP Setpoint') ## # Static Pressure Reset only ## elsif !plr_req && spr_req ## fan_variable_volume_set_control_type(fan, 'Multi Zone VAV with VSD and Fixed SP Setpoint') ## # No Control Required ## else ## fan_variable_volume_set_control_type(fan, 'Multi Zone VAV with AF or BI Riding Curve') ## end ## else ## OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.AirLoopHVAC', "For #{name}: there is a constant volume fan on a multizone vav system. Cannot apply static pressure reset controls.") ## end ## end end # Single zone systems if air_loop_hvac.thermalZones.size == 1 air_loop_hvac_supply_return_exhaust_relief_fans(air_loop_hvac).each do |fan| if fan.to_FanVariableVolume.is_initialized fan_variable_volume_set_control_type(fan, 'Single Zone VAV Fan') end end air_loop_hvac_apply_single_zone_controls(air_loop_hvac, climate_zone) end # DCV if air_loop_hvac_demand_control_ventilation_required?(air_loop_hvac, climate_zone) air_loop_hvac_enable_demand_control_ventilation(air_loop_hvac, climate_zone) # For systems that require DCV, # all individual zones that require DCV preserve # both per-area and per-person OA requirements. # Other zones have OA requirements converted # to per-area values only so DCV performance is only # based on the subset of zones that required DCV. air_loop_hvac.thermalZones.sort.each do |zone| if thermal_zone_demand_control_ventilation_required?(zone, climate_zone) thermal_zone_convert_oa_req_to_per_area(zone) end end else # For systems that do not require DCV, # convert OA requirements to per-area values # so that other features such as # multizone VAV optimization do not # incorrectly take variable occupancy into account. air_loop_hvac.thermalZones.sort.each do |zone| thermal_zone_convert_oa_req_to_per_area(zone) end end # SAT reset # TODO Prototype buildings use OAT-based SAT reset, # but PRM RM suggests Warmest zone based SAT reset. if air_loop_hvac_supply_air_temperature_reset_required?(air_loop_hvac, climate_zone) air_loop_hvac_enable_supply_air_temperature_reset_warmest_zone(air_loop_hvac) end # Unoccupied shutdown if air_loop_hvac_unoccupied_fan_shutoff_required?(air_loop_hvac) air_loop_hvac_enable_unoccupied_fan_shutoff(air_loop_hvac) else air_loop_hvac.setAvailabilitySchedule(air_loop_hvac.model.alwaysOnDiscreteSchedule) end # Motorized OA damper if air_loop_hvac_motorized_oa_damper_required?(air_loop_hvac, climate_zone) # Assume that the availability schedule has already been # set to reflect occupancy and use this for the OA damper. air_loop_hvac_add_motorized_oa_damper(air_loop_hvac, 0.15, air_loop_hvac.availabilitySchedule) else air_loop_hvac_remove_motorized_oa_damper(air_loop_hvac) end # Zones that require DCV preserve # both per-area and per-person OA reqs. # Other zones have OA reqs converted # to per-area values only so that DCV air_loop_hvac.thermalZones.sort.each do |zone| if thermal_zone_demand_control_ventilation_required?(zone, climate_zone) thermal_zone_convert_oa_req_to_per_area(zone) end end # TODO: Optimum Start # for systems exceeding 10,000 cfm # Don't think that OS will be able to do this. # OS currently only allows 1 availability manager # at a time on an AirLoopHVAC. If we add an # AvailabilityManager:OptimumStart, it # will replace the AvailabilityManager:NightCycle. end |
#air_loop_hvac_apply_vav_damper_action(air_loop_hvac) ⇒ Bool
see if this impacts the sizing run.
Set the VAV damper control to single maximum or dual maximum control depending on the standard.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2051 def air_loop_hvac_apply_vav_damper_action(air_loop_hvac) damper_action = air_loop_hvac_vav_damper_action(air_loop_hvac) # Interpret this as an EnergyPlus input damper_action_eplus = nil if damper_action == 'Single Maximum' damper_action_eplus = 'Normal' elsif damper_action == 'Dual Maximum' # EnergyPlus 8.7 changed the meaning of 'Reverse'. # For versions of OpenStudio using E+ 8.6 or lower damper_action_eplus = if air_loop_hvac.model.version < OpenStudio::VersionString.new('2.0.5') 'Reverse' # For versions of OpenStudio using E+ 8.7 or higher else 'ReverseWithLimits' end end # Set the control for any VAV reheat terminals # on this airloop. control_type_set = false air_loop_hvac.demandComponents.each do |equip| if equip.to_AirTerminalSingleDuctVAVReheat.is_initialized term = equip.to_AirTerminalSingleDuctVAVReheat.get # Dual maximum only applies to terminals with HW reheat coils if damper_action == 'Dual Maximum' if term.reheatCoil.to_CoilHeatingWater.is_initialized term.setDamperHeatingAction(damper_action_eplus) control_type_set = true end else term.setDamperHeatingAction(damper_action_eplus) control_type_set = true term.setMaximumFlowFractionDuringReheat(0.5) end end end if control_type_set OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: VAV damper action was set to #{damper_action} control.") end return true end |
#air_loop_hvac_data_center_area_served(air_loop_hvac) ⇒ Double
Add an is_data_center field to the
Determine how much data center area the airloop serves.
in m^2. standards space type spreadsheet instead of relying on the standards space type name to identify a data center.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 3013 def air_loop_hvac_data_center_area_served(air_loop_hvac) dc_area_m2 = 0.0 air_loop_hvac.thermalZones.each do |zone| zone.spaces.each do |space| # Skip spaces with no space type next if space.spaceType.empty? space_type = space.spaceType.get next if space_type.standardsSpaceType.empty? standards_space_type = space_type.standardsSpaceType.get # Counts as a data center if the name includes 'data' next unless standards_space_type.downcase.include?('data') dc_area_m2 += space.floorArea end end return dc_area_m2 end |
#air_loop_hvac_dcv_required_when_erv(air_loop_hvac) ⇒ Object
Determine if the standard has an exception for demand control ventilation when an energy recovery device is present. Defaults to true.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1795 def air_loop_hvac_dcv_required_when_erv(air_loop_hvac) dcv_required_when_erv_present = false return dcv_required_when_erv_present end |
#air_loop_hvac_demand_control_ventilation_limits(air_loop_hvac) ⇒ Array<Double>
Determines the OA flow rates above which an economizer is required. Two separate rates, one for systems with an economizer and another for systems without. Defaults to pre-1980 logic, where the limits are zero for both types.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1787 def air_loop_hvac_demand_control_ventilation_limits(air_loop_hvac) min_oa_without_economizer_cfm = 0 min_oa_with_economizer_cfm = 0 return [min_oa_without_economizer_cfm, min_oa_with_economizer_cfm] end |
#air_loop_hvac_demand_control_ventilation_required?(air_loop_hvac, climate_zone) ⇒ Bool
Add exception logic for systems that serve multifamily, parking garage, warehouse
Determine if demand control ventilation (DCV) is required for this air loop.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1705 def air_loop_hvac_demand_control_ventilation_required?(air_loop_hvac, climate_zone) dcv_required = false # OA flow limits min_oa_without_economizer_cfm, min_oa_with_economizer_cfm = air_loop_hvac_demand_control_ventilation_limits(air_loop_hvac) # If the limits are zero for both, DCV not required if min_oa_without_economizer_cfm.zero? && min_oa_with_economizer_cfm.zero? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{template} #{climate_zone}: #{air_loop_hvac.name}: DCV is not required for any system.") return dcv_required end # Check if the system has an ERV if air_loop_hvac_energy_recovery?(air_loop_hvac) # May or may not be required for systems that have an ERV if air_loop_hvac_dcv_required_when_erv(air_loop_hvac) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: DCV may be required although the system has Energy Recovery.") else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: DCV is not required since the system has Energy Recovery.") return dcv_required end end # Get the min OA flow rate oa_flow_m3_per_s = 0 if air_loop_hvac.airLoopHVACOutdoorAirSystem.is_initialized oa_system = air_loop_hvac.airLoopHVACOutdoorAirSystem.get controller_oa = oa_system.getControllerOutdoorAir if controller_oa.minimumOutdoorAirFlowRate.is_initialized oa_flow_m3_per_s = controller_oa.minimumOutdoorAirFlowRate.get elsif controller_oa.autosizedMinimumOutdoorAirFlowRate.is_initialized oa_flow_m3_per_s = controller_oa.autosizedMinimumOutdoorAirFlowRate.get end else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}, DCV not applicable because it has no OA intake.") return dcv_required end oa_flow_cfm = OpenStudio.convert(oa_flow_m3_per_s, 'm^3/s', 'cfm').get # Check for min OA without an economizer OR has economizer if oa_flow_cfm < min_oa_without_economizer_cfm && air_loop_hvac_economizer?(air_loop_hvac) == false # Message if doesn't pass OA limit if oa_flow_cfm < min_oa_without_economizer_cfm OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: DCV is not required since the system min oa flow is #{oa_flow_cfm.round} cfm, less than the minimum of #{min_oa_without_economizer_cfm.round} cfm.") end # Message if doesn't have economizer if air_loop_hvac_economizer?(air_loop_hvac) == false OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: DCV is not required since the system does not have an economizer.") end return dcv_required end # If has economizer, cfm limit is lower if oa_flow_cfm < min_oa_with_economizer_cfm && air_loop_hvac_economizer?(air_loop_hvac) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: DCV is not required since the system has an economizer, but the min oa flow is #{oa_flow_cfm.round} cfm, less than the minimum of #{min_oa_with_economizer_cfm.round} cfm for systems with an economizer.") return dcv_required end # Check area and density limits # for all of zones on the loop any_zones_req_dcv = false air_loop_hvac.thermalZones.sort.each do |zone| if thermal_zone_demand_control_ventilation_required?(zone, climate_zone) any_zones_req_dcv = true break end end unless any_zones_req_dcv return dcv_required end # If here, DCV is required dcv_required = true return dcv_required end |
#air_loop_hvac_disable_multizone_vav_optimization(air_loop_hvac) ⇒ Bool
Disable multizone vav optimization by changing the Outdoor Air Method in the Controller:MechanicalVentilation object to ‘ZoneSum’
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1434 def air_loop_hvac_disable_multizone_vav_optimization(air_loop_hvac) # Disable multizone vav optimization # at each timestep. if air_loop_hvac.airLoopHVACOutdoorAirSystem.is_initialized oa_system = air_loop_hvac.airLoopHVACOutdoorAirSystem.get controller_oa = oa_system.getControllerOutdoorAir controller_mv = controller_oa.controllerMechanicalVentilation controller_mv.setSystemOutdoorAirMethod('ZoneSum') controller_oa.autosizeMinimumOutdoorAirFlowRate else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}, cannot disable multizone vav optimization because the system has no OA intake.") return false end end |
#air_loop_hvac_dx_cooling?(air_loop_hvac) ⇒ Bool
Determine if this Air Loop uses DX cooling.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 3133 def air_loop_hvac_dx_cooling?(air_loop_hvac) dx_clg = false # Check for all DX coil types dx_types = [ 'OS_Coil_Cooling_DX_MultiSpeed', 'OS_Coil_Cooling_DX_SingleSpeed', 'OS_Coil_Cooling_DX_TwoSpeed', 'OS_Coil_Cooling_DX_TwoStageWithHumidityControlMode', 'OS_Coil_Cooling_DX_VariableRefrigerantFlow', 'OS_Coil_Cooling_DX_VariableSpeed', 'OS_CoilSystem_Cooling_DX_HeatExchangerAssisted' ] air_loop_hvac.supplyComponents.each do |component| # Get the object type, getting the internal coil # type if inside a unitary system. obj_type = component.iddObjectType.valueName.to_s case obj_type when 'OS_AirLoopHVAC_UnitaryHeatCool_VAVChangeoverBypass' component = component.to_AirLoopHVACUnitaryHeatCoolVAVChangeoverBypass.get obj_type = component.coolingCoil.iddObjectType.valueName.to_s when 'OS_AirLoopHVAC_UnitaryHeatPump_AirToAir' component = component.to_AirLoopHVACUnitaryHeatPumpAirToAir.get obj_type = component.coolingCoil.iddObjectType.valueName.to_s when 'OS_AirLoopHVAC_UnitaryHeatPump_AirToAir_MultiSpeed' component = component.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.get obj_type = component.coolingCoil.iddObjectType.valueName.to_s when 'OS_AirLoopHVAC_UnitarySystem' component = component.to_AirLoopHVACUnitarySystem.get if component.coolingCoil.is_initialized obj_type = component.coolingCoil.get.iddObjectType.valueName.to_s end end # See if the object type is a DX coil if dx_types.include?(obj_type) dx_clg = true break # Stop if find a DX coil end end return dx_clg end |
#air_loop_hvac_economizer?(air_loop_hvac) ⇒ Bool
Determine if the system has an economizer
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1936 def air_loop_hvac_economizer?(air_loop_hvac) # Get the OA system and OA controller oa_sys = air_loop_hvac.airLoopHVACOutdoorAirSystem if oa_sys.is_initialized oa_sys = oa_sys.get else return false # No OA system end oa_control = oa_sys.getControllerOutdoorAir economizer_type = oa_control.getEconomizerControlType # Return false if no economizer is present if economizer_type == 'NoEconomizer' return false else return true end end |
#air_loop_hvac_economizer_limits(air_loop_hvac, climate_zone) ⇒ Array<Double>
Determine the limits for the type of economizer present on the AirLoopHVAC, if any.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 836 def air_loop_hvac_economizer_limits(air_loop_hvac, climate_zone) drybulb_limit_f = nil enthalpy_limit_btu_per_lb = nil dewpoint_limit_f = nil # Get the OA system and OA controller oa_sys = air_loop_hvac.airLoopHVACOutdoorAirSystem if oa_sys.is_initialized oa_sys = oa_sys.get else return [nil, nil, nil] # No OA system end oa_control = oa_sys.getControllerOutdoorAir economizer_type = oa_control.getEconomizerControlType case economizer_type when 'NoEconomizer' return [nil, nil, nil] when 'FixedDryBulb' case climate_zone when 'ASHRAE 169-2006-1B', 'ASHRAE 169-2006-2B', 'ASHRAE 169-2006-3B', 'ASHRAE 169-2006-3C', 'ASHRAE 169-2006-4B', 'ASHRAE 169-2006-4C', 'ASHRAE 169-2006-5B', 'ASHRAE 169-2006-5C', 'ASHRAE 169-2006-6B', 'ASHRAE 169-2006-7B', 'ASHRAE 169-2006-8A', 'ASHRAE 169-2006-8B' drybulb_limit_f = 75 when 'ASHRAE 169-2006-5A', 'ASHRAE 169-2006-6A', 'ASHRAE 169-2006-7A' drybulb_limit_f = 70 when 'ASHRAE 169-2006-1A', 'ASHRAE 169-2006-2A', 'ASHRAE 169-2006-3A', 'ASHRAE 169-2006-4A' drybulb_limit_f = 65 end when 'FixedEnthalpy' enthalpy_limit_btu_per_lb = 28 when 'FixedDewPointAndDryBulb' drybulb_limit_f = 75 dewpoint_limit_f = 55 end return [drybulb_limit_f, enthalpy_limit_btu_per_lb, dewpoint_limit_f] end |
#air_loop_hvac_economizer_required?(air_loop_hvac, climate_zone) ⇒ Bool
Determine whether or not this system is required to have an economizer.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 708 def air_loop_hvac_economizer_required?(air_loop_hvac, climate_zone) economizer_required = false return economizer_required if air_loop_hvac.name.to_s.include? 'Outpatient F1' # Determine if the airloop serves any computer rooms # / data centers, which changes the economizer. is_dc = false if air_loop_hvac_data_center_area_served(air_loop_hvac) > 0 is_dc = true end # Retrieve economizer limits from JSON search_criteria = { 'template' => template, 'climate_zone' => climate_zone, 'data_center' => is_dc } econ_limits = model_find_object(standards_data['economizers'], search_criteria, nil) if econ_limits.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "Cannot find economizer limits for #{template}, #{climate_zone}, assuming no economizer required.") return economizer_required end # Determine the minimum capacity and whether or not it is a data center minimum_capacity_btu_per_hr = econ_limits['capacity_limit'] # A big number of btu per hr as the minimum requirement if nil in spreadsheet infinity_btu_per_hr = 999_999_999_999 minimum_capacity_btu_per_hr = infinity_btu_per_hr if minimum_capacity_btu_per_hr.nil? # Check whether the system requires an economizer by comparing # the system capacity to the minimum capacity. total_cooling_capacity_w = air_loop_hvac_total_cooling_capacity(air_loop_hvac) total_cooling_capacity_btu_per_hr = OpenStudio.convert(total_cooling_capacity_w, 'W', 'Btu/hr').get if total_cooling_capacity_btu_per_hr >= minimum_capacity_btu_per_hr if is_dc OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "#{air_loop_hvac.name} requires an economizer because the total cooling capacity of #{total_cooling_capacity_btu_per_hr.round} Btu/hr exceeds the minimum capacity of #{minimum_capacity_btu_per_hr.round} Btu/hr for data centers.") else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "#{air_loop_hvac.name} requires an economizer because the total cooling capacity of #{total_cooling_capacity_btu_per_hr.round} Btu/hr exceeds the minimum capacity of #{minimum_capacity_btu_per_hr.round} Btu/hr.") end economizer_required = true else if is_dc OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "#{air_loop_hvac.name} does not require an economizer because the total cooling capacity of #{total_cooling_capacity_btu_per_hr.round} Btu/hr is less than the minimum capacity of #{minimum_capacity_btu_per_hr.round} Btu/hr for data centers.") else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "#{air_loop_hvac.name} does not require an economizer because the total cooling capacity of #{total_cooling_capacity_btu_per_hr.round} Btu/hr is less than the minimum capacity of #{minimum_capacity_btu_per_hr.round} Btu/hr.") end end return economizer_required end |
#air_loop_hvac_economizer_type_allowable?(air_loop_hvac, climate_zone) ⇒ Bool
Check the economizer type currently specified in the ControllerOutdoorAir object on this air loop is acceptable per the standard. Defaults to 90.1-2007 logic.
Returns false if the economizer type is not allowable.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1129 def air_loop_hvac_economizer_type_allowable?(air_loop_hvac, climate_zone) # EnergyPlus economizer types # 'NoEconomizer' # 'FixedDryBulb' # 'FixedEnthalpy' # 'DifferentialDryBulb' # 'DifferentialEnthalpy' # 'FixedDewPointAndDryBulb' # 'ElectronicEnthalpy' # 'DifferentialDryBulbAndEnthalpy' # Get the OA system and OA controller oa_sys = air_loop_hvac.airLoopHVACOutdoorAirSystem if oa_sys.is_initialized oa_sys = oa_sys.get else return true # No OA system end oa_control = oa_sys.getControllerOutdoorAir economizer_type = oa_control.getEconomizerControlType # Return true if no economizer is present if economizer_type == 'NoEconomizer' return true end # Determine the prohibited types prohibited_types = [] case climate_zone when 'ASHRAE 169-2006-1B', 'ASHRAE 169-2006-2B', 'ASHRAE 169-2006-3B', 'ASHRAE 169-2006-3C', 'ASHRAE 169-2006-4B', 'ASHRAE 169-2006-4C', 'ASHRAE 169-2006-5B', 'ASHRAE 169-2006-6B', 'ASHRAE 169-2006-7A', 'ASHRAE 169-2006-7B', 'ASHRAE 169-2006-8A', 'ASHRAE 169-2006-8B' prohibited_types = ['FixedEnthalpy'] when 'ASHRAE 169-2006-1A', 'ASHRAE 169-2006-2A', 'ASHRAE 169-2006-3A', 'ASHRAE 169-2006-4A' prohibited_types = ['DifferentialDryBulb'] when 'ASHRAE 169-2006-5A', 'ASHRAE 169-2006-6A', prohibited_types = [] end # Check if the specified type is allowed economizer_type_allowed = true if prohibited_types.include?(economizer_type) economizer_type_allowed = false end return economizer_type_allowed end |
#air_loop_hvac_enable_demand_control_ventilation(air_loop_hvac, climate_zone) ⇒ Bool
Enable demand control ventilation (DCV) for this air loop. Zones on this loop that require DCV preserve both per-area and per-person OA reqs. Other zones have OA reqs converted to per-area values only so that DCV won’t impact these zones.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1807 def air_loop_hvac_enable_demand_control_ventilation(air_loop_hvac, climate_zone) # Get the OA intake controller_oa = nil controller_mv = nil if air_loop_hvac.airLoopHVACOutdoorAirSystem.is_initialized oa_system = air_loop_hvac.airLoopHVACOutdoorAirSystem.get controller_oa = oa_system.getControllerOutdoorAir controller_mv = controller_oa.controllerMechanicalVentilation if controller_mv.demandControlledVentilation == true OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: DCV was already enabled.") return true end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Could not enable DCV since the system has no OA intake.") return false end # Change the min flow rate in the controller outdoor air controller_oa.setMinimumOutdoorAirFlowRate(0.0) # Enable DCV in the controller mechanical ventilation controller_mv.setDemandControlledVentilation(true) return true end |
#air_loop_hvac_enable_multizone_vav_optimization(air_loop_hvac) ⇒ Bool
Enable multizone vav optimization by changing the Outdoor Air Method in the Controller:MechanicalVentilation object to ‘VentilationRateProcedure’
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1414 def air_loop_hvac_enable_multizone_vav_optimization(air_loop_hvac) # Enable multizone vav optimization # at each timestep. if air_loop_hvac.airLoopHVACOutdoorAirSystem.is_initialized oa_system = air_loop_hvac.airLoopHVACOutdoorAirSystem.get controller_oa = oa_system.getControllerOutdoorAir controller_mv = controller_oa.controllerMechanicalVentilation controller_mv.setSystemOutdoorAirMethod('VentilationRateProcedure') # Change the min flow rate in the controller outdoor air controller_oa.setMinimumOutdoorAirFlowRate(0.0) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}, cannot enable multizone vav optimization because the system has no OA intake.") return false end end |
#air_loop_hvac_enable_supply_air_temperature_reset_delta(air_loop_hvac) ⇒ Double
Determines supply air temperature (SAT) temperature. Defaults to 90.1-2007, 5 delta-F ®
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1881 def air_loop_hvac_enable_supply_air_temperature_reset_delta(air_loop_hvac) sat_reset_r = 5 return sat_reset_r end |
#air_loop_hvac_enable_supply_air_temperature_reset_outdoor_temperature(air_loop_hvac) ⇒ Bool
Enable supply air temperature (SAT) reset based on outdoor air conditions. SAT will be kept at the current design temperature when outdoor air is above 70F, increased by 5F when outdoor air is below 50F, and reset linearly when outdoor air is between 50F and 70F.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1894 def air_loop_hvac_enable_supply_air_temperature_reset_outdoor_temperature(air_loop_hvac) # for AHU1 in Outpatient, SAT is 52F constant, no reset return true if air_loop_hvac.name.get == 'PVAV Outpatient F1' # Get the current setpoint and calculate # the new setpoint. sizing_system = air_loop_hvac.sizingSystem sat_at_hi_oat_c = sizing_system.centralCoolingDesignSupplyAirTemperature sat_at_hi_oat_f = OpenStudio.convert(sat_at_hi_oat_c, 'C', 'F').get # 5F increase when it's cold outside, # and therefore less cooling capacity is likely required. increase_f = 5.0 sat_at_lo_oat_f = sat_at_hi_oat_f + increase_f sat_at_lo_oat_c = OpenStudio.convert(sat_at_lo_oat_f, 'F', 'C').get # Define the high and low outdoor air temperatures lo_oat_f = 50 lo_oat_c = OpenStudio.convert(lo_oat_f, 'F', 'C').get hi_oat_f = 70 hi_oat_c = OpenStudio.convert(hi_oat_f, 'F', 'C').get # Create a setpoint manager sat_oa_reset = OpenStudio::Model::SetpointManagerOutdoorAirReset.new(air_loop_hvac.model) sat_oa_reset.setName("#{air_loop_hvac.name} SAT Reset") sat_oa_reset.setControlVariable('Temperature') sat_oa_reset.setSetpointatOutdoorLowTemperature(sat_at_lo_oat_c) sat_oa_reset.setOutdoorLowTemperature(lo_oat_c) sat_oa_reset.setSetpointatOutdoorHighTemperature(sat_at_hi_oat_c) sat_oa_reset.setOutdoorHighTemperature(hi_oat_c) # Attach the setpoint manager to the # supply outlet node of the system. sat_oa_reset.addToNode(supplyOutletNode) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Supply air temperature reset was enabled. When OAT > #{hi_oat_f.round}F, SAT is #{sat_at_hi_oat_f.round}F. When OAT < #{lo_oat_f.round}F, SAT is #{sat_at_lo_oat_f.round}F. It varies linearly in between these points.") return true end |
#air_loop_hvac_enable_supply_air_temperature_reset_warmest_zone(air_loop_hvac) ⇒ Bool
Enable supply air temperature (SAT) reset based on the cooling demand of the warmest zone.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1847 def air_loop_hvac_enable_supply_air_temperature_reset_warmest_zone(air_loop_hvac) # Get the current setpoint and calculate # the new setpoint. sizing_system = air_loop_hvac.sizingSystem design_sat_c = sizing_system.centralCoolingDesignSupplyAirTemperature design_sat_f = OpenStudio.convert(design_sat_c, 'C', 'F').get # Get the SAT reset delta sat_reset_r = air_loop_hvac_enable_supply_air_temperature_reset_delta(air_loop_hvac) sat_reset_k = OpenStudio.convert(sat_reset_r, 'R', 'K').get max_sat_f = design_sat_f + sat_reset_r max_sat_c = design_sat_c + sat_reset_k # Create a setpoint manager sat_warmest_reset = OpenStudio::Model::SetpointManagerWarmest.new(air_loop_hvac.model) sat_warmest_reset.setName("#{air_loop_hvac.name} SAT Warmest Reset") sat_warmest_reset.setStrategy('MaximumTemperature') sat_warmest_reset.setMinimumSetpointTemperature(design_sat_c) sat_warmest_reset.setMaximumSetpointTemperature(max_sat_c) # Attach the setpoint manager to the # supply outlet node of the system. sat_warmest_reset.addToNode(air_loop_hvac.supplyOutletNode) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Supply air temperature reset was enabled using a SPM Warmest with a min SAT of #{design_sat_f.round}F and a max SAT of #{max_sat_f.round}F.") return true end |
#air_loop_hvac_enable_unoccupied_fan_shutoff(air_loop_hvac, min_occ_pct = 0.15) ⇒ Bool
Shut off the system during unoccupied periods. During these times, systems will cycle on briefly if temperature drifts below setpoint. For systems with fan-powered terminals, the whole system (not just the terminal fans) will cycle on. Terminal-only night cycling is not used because the terminals cannot provide cooling, so terminal-only night cycling leads to excessive unmet cooling hours during unoccupied periods. If the system already has a schedule other than Always-On, no change will be made. If the system has an Always-On schedule assigned, a new schedule will be created. In this case, occupied is defined as the total percent occupancy for the loop for all zones served.
the system will be considered unoccupied.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2916 def air_loop_hvac_enable_unoccupied_fan_shutoff(air_loop_hvac, min_occ_pct = 0.15) # Set the system to night cycle air_loop_hvac.setNightCycleControlType('CycleOnAny') # Check if already using a schedule other than always on avail_sch = air_loop_hvac.availabilitySchedule unless avail_sch == air_loop_hvac.model.alwaysOnDiscreteSchedule OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Availability schedule is already set to #{avail_sch.name}. Will assume this includes unoccupied shut down; no changes will be made.") return true end # Get the airloop occupancy schedule loop_occ_sch = air_loop_hvac_get_occupancy_schedule(air_loop_hvac, min_occ_pct) flh = schedule_ruleset_annual_equivalent_full_load_hrs(loop_occ_sch) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Annual occupied hours = #{flh.round} hr/yr, assuming a #{min_occ_pct} occupancy threshold. This schedule will be used as the HVAC operation schedule.") # Set HVAC availability schedule to follow occupancy air_loop_hvac.setAvailabilitySchedule(loop_occ_sch) return true end |
#air_loop_hvac_energy_recovery?(air_loop_hvac) ⇒ Bool
Determine if the system has energy recovery already
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2025 def air_loop_hvac_energy_recovery?(air_loop_hvac) has_erv = false # Get the OA system oa_sys = air_loop_hvac.airLoopHVACOutdoorAirSystem if oa_sys.is_initialized oa_sys = oa_sys.get else return has_erv # No OA system end # Find any ERV on the OA system oa_sys.oaComponents.each do |oa_comp| if oa_comp.to_HeatExchangerAirToAirSensibleAndLatent.is_initialized has_erv = true end end return has_erv end |
#air_loop_hvac_energy_recovery_ventilator_flow_limit(air_loop_hvac, climate_zone, pct_oa) ⇒ Double
Determine the airflow limits that govern whether or not an ERV is required. Based on climate zone and % OA. Defaults to DOE Ref Pre-1980, not required. if nil, ERV is never required.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1303 def air_loop_hvac_energy_recovery_ventilator_flow_limit(air_loop_hvac, climate_zone, pct_oa) erv_cfm = nil # Not required return erv_cfm end |
#air_loop_hvac_energy_recovery_ventilator_required?(air_loop_hvac, climate_zone) ⇒ Bool
Add exception logic for systems serving parking garage, warehouse, or multifamily
Check if ERV is required on this airloop.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1197 def air_loop_hvac_energy_recovery_ventilator_required?(air_loop_hvac, climate_zone) # ERV Not Applicable for AHUs that serve # parking garage, warehouse, or multifamily # if space_types_served_names.include?('PNNL_Asset_Rating_Apartment_Space_Type') || # space_types_served_names.include?('PNNL_Asset_Rating_LowRiseApartment_Space_Type') || # space_types_served_names.include?('PNNL_Asset_Rating_ParkingGarage_Space_Type') || # space_types_served_names.include?('PNNL_Asset_Rating_Warehouse_Space_Type') # OpenStudio::logFree(OpenStudio::Info, "openstudio.standards.AirLoopHVAC", "For #{self.name}, ERV not applicable because it because it serves parking garage, warehouse, or multifamily.") # return false # end erv_required = nil # ERV not applicable for medical AHUs (AHU1 in Outpatient), per AIA 2001 - 7.31.D2. # TODO refactor: move building type specific code if air_loop_hvac.name.to_s.include? 'Outpatient F1' erv_required = false return erv_required end # ERV not applicable for medical AHUs, per AIA 2001 - 7.31.D2. if air_loop_hvac.name.to_s.include? 'VAV_ER' erv_required = false return erv_required elsif air_loop_hvac.name.to_s.include? 'VAV_OR' erv_required = false return erv_required end case template when '90.1-2004', '90.1-2007' # TODO: Refactor figure out how to remove this. if air_loop_hvac.name.to_s.include? 'VAV_ICU' erv_required = false return erv_required elsif air_loop_hvac.name.to_s.include? 'VAV_PATRMS' erv_required = false return erv_required end end # ERV Not Applicable for AHUs that have DCV # or that have no OA intake. controller_oa = nil controller_mv = nil oa_system = nil if air_loop_hvac.airLoopHVACOutdoorAirSystem.is_initialized oa_system = air_loop_hvac.airLoopHVACOutdoorAirSystem.get controller_oa = oa_system.getControllerOutdoorAir controller_mv = controller_oa.controllerMechanicalVentilation if controller_mv.demandControlledVentilation == true OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}, ERV not applicable because DCV enabled.") return false end else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}, ERV not applicable because it has no OA intake.") return false end # Get the AHU design supply air flow rate dsn_flow_m3_per_s = nil if air_loop_hvac.designSupplyAirFlowRate.is_initialized dsn_flow_m3_per_s = air_loop_hvac.designSupplyAirFlowRate.get elsif air_loop_hvac.autosizedDesignSupplyAirFlowRate.is_initialized dsn_flow_m3_per_s = air_loop_hvac.autosizedDesignSupplyAirFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} design supply air flow rate is not available, cannot apply efficiency standard.") return false end dsn_flow_cfm = OpenStudio.convert(dsn_flow_m3_per_s, 'm^3/s', 'cfm').get # Get the minimum OA flow rate min_oa_flow_m3_per_s = nil if controller_oa.minimumOutdoorAirFlowRate.is_initialized min_oa_flow_m3_per_s = controller_oa.minimumOutdoorAirFlowRate.get elsif controller_oa.autosizedMinimumOutdoorAirFlowRate.is_initialized min_oa_flow_m3_per_s = controller_oa.autosizedMinimumOutdoorAirFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{controller_oa.name}: minimum OA flow rate is not available, cannot apply efficiency standard.") return false end min_oa_flow_cfm = OpenStudio.convert(min_oa_flow_m3_per_s, 'm^3/s', 'cfm').get # Calculate the percent OA at design airflow pct_oa = min_oa_flow_m3_per_s / dsn_flow_m3_per_s # Determine the airflow limit erv_cfm = air_loop_hvac_energy_recovery_ventilator_flow_limit(air_loop_hvac, climate_zone, pct_oa) # Determine if an ERV is required if erv_cfm.nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}, ERV not required based on #{(pct_oa * 100).round}% OA flow, design supply air flow of #{dsn_flow_cfm.round}cfm, and climate zone #{climate_zone}.") erv_required = false elsif dsn_flow_cfm < erv_cfm OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}, ERV not required based on #{(pct_oa * 100).round}% OA flow, design supply air flow of #{dsn_flow_cfm.round}cfm, and climate zone #{climate_zone}. Does not exceed minimum flow requirement of #{erv_cfm}cfm.") erv_required = false else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}, ERV required based on #{(pct_oa * 100).round}% OA flow, design supply air flow of #{dsn_flow_cfm.round}cfm, and climate zone #{climate_zone}. Exceeds minimum flow requirement of #{erv_cfm}cfm.") erv_required = true end return erv_required end |
#air_loop_hvac_fan_power_limitation_pressure_drop_adjustment_brake_horsepower(air_loop_hvac) ⇒ Double
Determine the presence of MERV filters and other stuff in Table 6.5.3.1.1B. May need to extend AirLoopHVAC data model
Determine the fan power limitation pressure drop adjustment Per Table 6.5.3.1.1B
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 270 def air_loop_hvac_fan_power_limitation_pressure_drop_adjustment_brake_horsepower(air_loop_hvac) # Get design supply air flow rate (whether autosized or hard-sized) dsn_air_flow_m3_per_s = 0 dsn_air_flow_cfm = 0 if air_loop_hvac.autosizedDesignSupplyAirFlowRate.is_initialized dsn_air_flow_m3_per_s = air_loop_hvac.autosizedDesignSupplyAirFlowRate.get dsn_air_flow_cfm = OpenStudio.convert(dsn_air_flow_m3_per_s, 'm^3/s', 'cfm').get OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "* #{dsn_air_flow_cfm.round} cfm = Autosized Design Supply Air Flow Rate.") else dsn_air_flow_m3_per_s = air_loop_hvac.designSupplyAirFlowRate.get dsn_air_flow_cfm = OpenStudio.convert(dsn_air_flow_m3_per_s, 'm^3/s', 'cfm').get OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "* #{dsn_air_flow_cfm.round} cfm = Hard sized Design Supply Air Flow Rate.") end # TODO: determine the presence of MERV filters and other stuff # in Table 6.5.3.1.1B # perhaps need to extend AirLoopHVAC data model has_fully_ducted_return_and_or_exhaust_air_systems = false # Calculate Fan Power Limitation Pressure Drop Adjustment (in wc) fan_pwr_adjustment_in_wc = 0 # Fully ducted return and/or exhaust air systems if has_fully_ducted_return_and_or_exhaust_air_systems adj_in_wc = 0.5 fan_pwr_adjustment_in_wc += adj_in_wc OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "--Added #{adj_in_wc} in wc for Fully ducted return and/or exhaust air systems") end # Convert the pressure drop adjustment to brake horsepower (bhp) # assuming that all supply air passes through all devices fan_pwr_adjustment_bhp = fan_pwr_adjustment_in_wc * dsn_air_flow_cfm / 4131 OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Fan Power Limitation Pressure Drop Adjustment = #{fan_pwr_adjustment_bhp.round(2)} bhp") return fan_pwr_adjustment_bhp end |
#air_loop_hvac_find_design_supply_air_flow_rate(air_loop_hvac) ⇒ Double
find design_supply_air_flow_rate
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2990 def air_loop_hvac_find_design_supply_air_flow_rate(air_loop_hvac) # Get the design_supply_air_flow_rate design_supply_air_flow_rate = nil if air_loop_hvac.designSupplyAirFlowRate.is_initialized design_supply_air_flow_rate = air_loop_hvac.designSupplyAirFlowRate.get elsif air_loop_hvac.autosizedDesignSupplyAirFlowRate.is_initialized design_supply_air_flow_rate = air_loop_hvac.autosizedDesignSupplyAirFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} design sypply air flow rate is not available.") end return design_supply_air_flow_rate end |
#air_loop_hvac_floor_area_served(air_loop_hvac) ⇒ Object
Calculate the total floor area of all zones attached to the air loop, in m^2.
return [Double] the total floor area of all zones attached to the air loop, in m^2.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2943 def air_loop_hvac_floor_area_served(air_loop_hvac) total_area = 0.0 air_loop_hvac.thermalZones.each do |zone| total_area += zone.floorArea end return total_area end |
#air_loop_hvac_floor_area_served_exterior_zones(air_loop_hvac) ⇒ Object
Calculate the total floor area of all zones attached to the air loop that have at least one exterior surface, in m^2.
return [Double] the total floor area of all zones attached to the air loop, in m^2.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2975 def air_loop_hvac_floor_area_served_exterior_zones(air_loop_hvac) total_area = 0.0 air_loop_hvac.thermalZones.each do |zone| # Skip zones that have no exterior surface area next if zone.exteriorSurfaceArea.zero? total_area += zone.floorArea end return total_area end |
#air_loop_hvac_floor_area_served_interior_zones(air_loop_hvac) ⇒ Object
Calculate the total floor area of all zones attached to the air loop that have no exterior surfaces, in m^2.
return [Double] the total floor area of all zones attached to the air loop, in m^2.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2958 def air_loop_hvac_floor_area_served_interior_zones(air_loop_hvac) total_area = 0.0 air_loop_hvac.thermalZones.each do |zone| # Skip zones that have exterior surface area next if zone.exteriorSurfaceArea > 0 total_area += zone.floorArea end return total_area end |
#air_loop_hvac_get_occupancy_schedule(air_loop_hvac, occupied_percentage_threshold = 0.05) ⇒ ScheduleRuleset
Speed up this method. Bottleneck is ScheduleRule.getDaySchedules
This method creates a schedule where the value is zero when the overall occupancy for all zones on the airloop is below the specified threshold, and one when the overall occupancy is greater than or equal to the threshold. This method is designed to use the total number of people on the airloop, so if there is a zone that is continuously occupied by a few people, but other zones that are intermittently occupied by many people, the first zone doesn’t drive the entire system.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2256 def air_loop_hvac_get_occupancy_schedule(air_loop_hvac, occupied_percentage_threshold = 0.05) # Get all the occupancy schedules in every space in every zone # served by this airloop. Include people added via the SpaceType # in addition to people hard-assigned to the Space itself. occ_schedules_num_occ = {} max_occ_on_airloop = 0 air_loop_hvac.thermalZones.each do |zone| # Get the people objects zone.spaces.each do |space| # From the space type if space.spaceType.is_initialized space.spaceType.get.people.each do |people| num_ppl_sch = people.numberofPeopleSchedule if num_ppl_sch.is_initialized num_ppl_sch = num_ppl_sch.get num_ppl_sch = num_ppl_sch.to_ScheduleRuleset next if num_ppl_sch.empty? # Skip non-ruleset schedules num_ppl_sch = num_ppl_sch.get num_ppl = people.getNumberOfPeople(space.floorArea) if occ_schedules_num_occ[num_ppl_sch].nil? occ_schedules_num_occ[num_ppl_sch] = num_ppl else occ_schedules_num_occ[num_ppl_sch] += num_ppl end max_occ_on_airloop += num_ppl end end end # From the space space.people.each do |people| num_ppl_sch = people.numberofPeopleSchedule if num_ppl_sch.is_initialized num_ppl_sch = num_ppl_sch.get num_ppl_sch = num_ppl_sch.to_ScheduleRuleset next if num_ppl_sch.empty? # Skip non-ruleset schedules num_ppl_sch = num_ppl_sch.get num_ppl = people.getNumberOfPeople(space.floorArea) if occ_schedules_num_occ[num_ppl_sch].nil? occ_schedules_num_occ[num_ppl_sch] = num_ppl else occ_schedules_num_occ[num_ppl_sch] += num_ppl end max_occ_on_airloop += num_ppl end end end end OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "#{air_loop_hvac.name} has #{occ_schedules_num_occ.size} unique occ schedules.") occ_schedules_num_occ.each do |occ_sch, num_occ| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', " #{occ_sch.name} - #{num_occ.round} people") end OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', " Total #{max_occ_on_airloop.round} people on #{air_loop_hvac.name}") # For each day of the year, determine # time_value_pairs = [] year = air_loop_hvac.model.getYearDescription yearly_data = [] yearly_times = OpenStudio::DateTimeVector.new yearly_values = [] (1..365).each do |i| times_on_this_day = [] os_date = year.makeDate(i) day_of_week = os_date.dayOfWeek.valueName # Get the unique time indices and corresponding day schedules occ_schedules_day_schs = {} day_sch_num_occ = {} occ_schedules_num_occ.each do |occ_sch, num_occ| # Get the day schedules for this day # (there should only be one) day_schs = occ_sch.getDaySchedules(os_date, os_date) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "Schedule #{occ_sch.name} has #{day_schs.size} day schs") unless day_schs.size == 1 day_schs[0].times.each do |time| times_on_this_day << time.toString end day_sch_num_occ[day_schs[0]] = num_occ end # Determine the total fraction for the airloop at each time daily_times = [] daily_os_times = [] daily_values = [] daily_occs = [] times_on_this_day.uniq.sort.each do |time| os_time = OpenStudio::Time.new(time) os_date_time = OpenStudio::DateTime.new(os_date, os_time) # Total number of people at each time tot_occ_at_time = 0 day_sch_num_occ.each do |day_sch, num_occ| occ_frac = day_sch.getValue(os_time) tot_occ_at_time += occ_frac * num_occ end # Total fraction for the airloop at each time air_loop_occ_frac = tot_occ_at_time / max_occ_on_airloop occ_status = 0 # unoccupied if air_loop_occ_frac >= occupied_percentage_threshold occ_status = 1 end # Add this data to the daily arrays daily_times << time daily_os_times << os_time daily_values << occ_status daily_occs << air_loop_occ_frac.round(2) end # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.AirLoopHVAC", "#{daily_times.join(', ')} #{daily_values.join(', ')}") # Simplify the daily times to eliminate intermediate # points with the same value as the following point. simple_daily_times = [] simple_daily_os_times = [] simple_daily_values = [] simple_daily_occs = [] daily_values.each_with_index do |value, j| next if value == daily_values[j + 1] simple_daily_times << daily_times[j] simple_daily_os_times << daily_os_times[j] simple_daily_values << daily_values[j] simple_daily_occs << daily_occs[j] end # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.AirLoopHVAC", "#{simple_daily_times.join(', ')} {simple_daily_values.join(', ')}") # Store the daily values yearly_data << { 'date' => os_date, 'day_of_week' => day_of_week, 'times' => simple_daily_times, 'values' => simple_daily_values, 'daily_os_times' => simple_daily_os_times, 'daily_occs' => simple_daily_occs } end # Create a TimeSeries from the data # time_series = OpenStudio::TimeSeries.new(times, values, 'unitless') # Make a schedule ruleset sch_name = "#{air_loop_hvac.name} Occ Sch" sch_ruleset = OpenStudio::Model::ScheduleRuleset.new(air_loop_hvac.model) sch_ruleset.setName(sch_name.to_s) # Default - All Occupied day_sch = sch_ruleset.defaultDaySchedule day_sch.setName("#{sch_name} Default") day_sch.addValue(OpenStudio::Time.new(0, 24, 0, 0), 1) # Winter Design Day - All Occupied day_sch = OpenStudio::Model::ScheduleDay.new(air_loop_hvac.model) sch_ruleset.setWinterDesignDaySchedule(day_sch) day_sch = sch_ruleset.winterDesignDaySchedule day_sch.setName("#{sch_name} Winter Design Day") day_sch.addValue(OpenStudio::Time.new(0, 24, 0, 0), 1) # Summer Design Day - All Occupied day_sch = OpenStudio::Model::ScheduleDay.new(air_loop_hvac.model) sch_ruleset.setSummerDesignDaySchedule(day_sch) day_sch = sch_ruleset.summerDesignDaySchedule day_sch.setName("#{sch_name} Summer Design Day") day_sch.addValue(OpenStudio::Time.new(0, 24, 0, 0), 1) # Create ruleset schedules, attempting to create # the minimum number of unique rules. ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'].each do |weekday| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', weekday.to_s) end_of_prev_rule = yearly_data[0]['date'] yearly_data.each_with_index do |daily_data, k| # Skip unless it is the day of week # currently under inspection day = daily_data['day_of_week'] next unless day == weekday date = daily_data['date'] times = daily_data['times'] values = daily_data['values'] daily_occs = daily_data['daily_occs'] # If the next (Monday, Tuesday, etc.) # is the same as today, keep going. # If the next is different, or if # we've reached the end of the year, # create a new rule unless yearly_data[k + 7].nil? next_day_times = yearly_data[k + 7]['times'] next_day_values = yearly_data[k + 7]['values'] next if times == next_day_times && values == next_day_values end daily_os_times = daily_data['daily_os_times'] daily_occs = daily_data['daily_occs'] # If here, we need to make a rule to cover from the previous # rule to today OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', "Making a new rule for #{weekday} from #{end_of_prev_rule} to #{date}") sch_rule = OpenStudio::Model::ScheduleRule.new(sch_ruleset) sch_rule.setName("#{sch_name} #{weekday} Rule") day_sch = sch_rule.daySchedule day_sch.setName("#{sch_name} #{weekday}") daily_os_times.each_with_index do |time, t| value = values[t] next if value == values[t + 1] # Don't add breaks if same value day_sch.addValue(time, value) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirLoopHVAC', " Adding value #{time}, #{value}") end # Set the dates when the rule applies sch_rule.setStartDate(end_of_prev_rule) sch_rule.setEndDate(date) # Individual Days sch_rule.setApplyMonday(true) if weekday == 'Monday' sch_rule.setApplyTuesday(true) if weekday == 'Tuesday' sch_rule.setApplyWednesday(true) if weekday == 'Wednesday' sch_rule.setApplyThursday(true) if weekday == 'Thursday' sch_rule.setApplyFriday(true) if weekday == 'Friday' sch_rule.setApplySaturday(true) if weekday == 'Saturday' sch_rule.setApplySunday(true) if weekday == 'Sunday' # Reset the previous rule end date end_of_prev_rule = date + OpenStudio::Time.new(0, 24, 0, 0) end end return sch_ruleset end |
#air_loop_hvac_integrated_economizer_required?(air_loop_hvac, climate_zone) ⇒ Boolean
Determine if the system economizer must be integrated or not. Default logic is from 90.1-2004.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 921 def air_loop_hvac_integrated_economizer_required?(air_loop_hvac, climate_zone) # Determine if it is a VAV system is_vav = air_loop_hvac_vav_system?(air_loop_hvac) # Determine the number of zones the system serves num_zones_served = air_loop_hvac.thermalZones.size minimum_capacity_btu_per_hr = 65_000 minimum_capacity_w = OpenStudio.convert(minimum_capacity_btu_per_hr, 'Btu/hr', 'W').get # 6.5.1.3 Integrated Economizer Control # Exception a, DX VAV systems if is_vav == true && num_zones_served > 1 integrated_economizer_required = false OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: non-integrated economizer per 6.5.1.3 exception a, DX VAV system.") # Exception b, DX units less than 65,000 Btu/hr elsif air_loop_hvac_total_cooling_capacity(air_loop_hvac) < minimum_capacity_w integrated_economizer_required = false OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: non-integrated economizer per 6.5.1.3 exception b, DX system less than #{minimum_capacity_btu_per_hr}Btu/hr.") else # Exception c, Systems in climate zones 1,2,3a,4a,5a,5b,6,7,8 case climate_zone when 'ASHRAE 169-2006-1A', 'ASHRAE 169-2006-1B', 'ASHRAE 169-2006-2A', 'ASHRAE 169-2006-2B', 'ASHRAE 169-2006-3A', 'ASHRAE 169-2006-4A', 'ASHRAE 169-2006-5A', 'ASHRAE 169-2006-5B', 'ASHRAE 169-2006-6A', 'ASHRAE 169-2006-6B', 'ASHRAE 169-2006-7A', 'ASHRAE 169-2006-7B', 'ASHRAE 169-2006-8A', 'ASHRAE 169-2006-8B' integrated_economizer_required = false OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: non-integrated economizer per 6.5.1.3 exception c, climate zone #{climate_zone}.") when 'ASHRAE 169-2006-3B', 'ASHRAE 169-2006-3C', 'ASHRAE 169-2006-4B', 'ASHRAE 169-2006-4C', 'ASHRAE 169-2006-5C' integrated_economizer_required = true end end return integrated_economizer_required end |
#air_loop_hvac_motorized_oa_damper_limits(air_loop_hvac, climate_zone) ⇒ Array<Double>
Determine the air flow and number of story limits for whether motorized OA damper is required. Defaults to DOE Ref Pre-1980 logic (never required). If both nil, never required
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2178 def air_loop_hvac_motorized_oa_damper_limits(air_loop_hvac, climate_zone) minimum_oa_flow_cfm = nil maximum_stories = nil return [minimum_oa_flow_cfm, maximum_stories] end |
#air_loop_hvac_motorized_oa_damper_required?(air_loop_hvac, climate_zone) ⇒ Boolean
Determine if a motorized OA damper is required
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2106 def air_loop_hvac_motorized_oa_damper_required?(air_loop_hvac, climate_zone) motorized_oa_damper_required = false # TODO: refactor: Remove building type dependent logic if air_loop_hvac.name.to_s.include? 'Outpatient F1' motorized_oa_damper_required = true OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: always has a damper, the minimum OA schedule is the same as airloop availability schedule.") return motorized_oa_damper_required end # If the system has an economizer, it must have # a motorized damper. if air_loop_hvac_economizer?(air_loop_hvac) motorized_oa_damper_required = true OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Because the system has an economizer, it requires a motorized OA damper.") return motorized_oa_damper_required end # Determine the exceptions based on # number of stories, climate zone, and # outdoor air intake rates. minimum_oa_flow_cfm, maximum_stories = air_loop_hvac_motorized_oa_damper_limits(air_loop_hvac, climate_zone) # Assuming that buildings not requiring this always # used backdraft gravity dampers if minimum_oa_flow_cfm.nil? && maximum_stories.nil? return motorized_oa_damper_required end # Get the number of stories num_stories = air_loop_hvac.model.getBuildingStorys.size # Check the number of stories exception, # which is climate-zone dependent. if num_stories < maximum_stories OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Motorized OA damper not required because the building has #{num_stories} stories, less than the maximum of #{maximum_stories} stories for climate zone #{climate_zone}.") return motorized_oa_damper_required end # Get the min OA flow rate oa_flow_m3_per_s = 0 if air_loop_hvac.airLoopHVACOutdoorAirSystem.is_initialized oa_system = air_loop_hvac.airLoopHVACOutdoorAirSystem.get controller_oa = oa_system.getControllerOutdoorAir if controller_oa.minimumOutdoorAirFlowRate.is_initialized oa_flow_m3_per_s = controller_oa.minimumOutdoorAirFlowRate.get elsif controller_oa.autosizedMinimumOutdoorAirFlowRate.is_initialized oa_flow_m3_per_s = controller_oa.autosizedMinimumOutdoorAirFlowRate.get end else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}, Motorized OA damper not applicable because it has no OA intake.") return motorized_oa_damper_required end oa_flow_cfm = OpenStudio.convert(oa_flow_m3_per_s, 'm^3/s', 'cfm').get # Check the OA flow rate exception if oa_flow_cfm < minimum_oa_flow_cfm OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Motorized OA damper not required because the system OA intake of #{oa_flow_cfm.round} cfm is less than the minimum threshold of #{minimum_oa_flow_cfm} cfm.") return motorized_oa_damper_required end # If here, motorized damper is required motorized_oa_damper_required = true return motorized_oa_damper_required end |
#air_loop_hvac_multi_stage_dx_cooling?(air_loop_hvac) ⇒ Bool
Determine if this Air Loop uses multi-stage DX cooling.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 3180 def air_loop_hvac_multi_stage_dx_cooling?(air_loop_hvac) dx_clg = false # Check for all DX coil types dx_types = [ 'OS_Coil_Cooling_DX_MultiSpeed', 'OS_Coil_Cooling_DX_TwoSpeed', 'OS_Coil_Cooling_DX_TwoStageWithHumidityControlMode' ] air_loop_hvac.supplyComponents.each do |component| # Get the object type, getting the internal coil # type if inside a unitary system. obj_type = component.iddObjectType.valueName.to_s case obj_type when 'OS_AirLoopHVAC_UnitaryHeatCool_VAVChangeoverBypass' component = component.to_AirLoopHVACUnitaryHeatCoolVAVChangeoverBypass.get obj_type = component.coolingCoil.iddObjectType.valueName.to_s when 'OS_AirLoopHVAC_UnitaryHeatPump_AirToAir' component = component.to_AirLoopHVACUnitaryHeatPumpAirToAir.get obj_type = component.coolingCoil.iddObjectType.valueName.to_s when 'OS_AirLoopHVAC_UnitaryHeatPump_AirToAir_MultiSpeed' component = component.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.get obj_type = component.coolingCoil.iddObjectType.valueName.to_s when 'OS_AirLoopHVAC_UnitarySystem' component = component.to_AirLoopHVACUnitarySystem.get if component.coolingCoil.is_initialized obj_type = component.coolingCoil.get.iddObjectType.valueName.to_s end end # See if the object type is a DX coil if dx_types.include?(obj_type) dx_clg = true break # Stop if find a DX coil end end return dx_clg end |
#air_loop_hvac_multizone_vav_optimization_required?(air_loop_hvac, climate_zone) ⇒ Bool
Add exception logic for systems with AIA healthcare ventilation requirements dual duct systems
Determine if multizone vav optimization is required. Defaults to 90.1-2007 logic, where it is not required.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1405 def air_loop_hvac_multizone_vav_optimization_required?(air_loop_hvac, climate_zone) multizone_opt_required = false return multizone_opt_required end |
#air_loop_hvac_multizone_vav_system?(air_loop_hvac) ⇒ Bool
Determine if the system is a multizone VAV system
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1983 def air_loop_hvac_multizone_vav_system?(air_loop_hvac) multizone_vav_system = false # Must serve more than 1 zone if air_loop_hvac.thermalZones.size < 2 return multizone_vav_system end # Must be a variable volume system is_vav = air_loop_hvac_vav_system?(air_loop_hvac) if is_vav == false return multizone_vav_system end # If here, it's a multizone VAV system multizone_vav_system = true return multizone_vav_system end |
#air_loop_hvac_prm_baseline_economizer_required?(air_loop_hvac, climate_zone) ⇒ Bool
Determine if an economizer is required per the PRM. Default logic from 90.1-2007
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 975 def air_loop_hvac_prm_baseline_economizer_required?(air_loop_hvac, climate_zone) economizer_required = false # A big number of ft2 as the minimum requirement infinity_ft2 = 999_999_999_999 min_int_area_served_ft2 = infinity_ft2 min_ext_area_served_ft2 = infinity_ft2 # Determine the minimum capacity that requires an economizer case climate_zone when 'ASHRAE 169-2006-1A', 'ASHRAE 169-2006-1B', 'ASHRAE 169-2006-2A', 'ASHRAE 169-2006-3A', 'ASHRAE 169-2006-4A' min_int_area_served_ft2 = infinity_ft2 # No requirement min_ext_area_served_ft2 = infinity_ft2 # No requirement else min_int_area_served_ft2 = 0 # Always required min_ext_area_served_ft2 = 0 # Always required end # Check whether the system requires an economizer by comparing # the system capacity to the minimum capacity. min_int_area_served_m2 = OpenStudio.convert(min_int_area_served_ft2, 'ft^2', 'm^2').get min_ext_area_served_m2 = OpenStudio.convert(min_ext_area_served_ft2, 'ft^2', 'm^2').get # Get the interior and exterior area served int_area_served_m2 = air_loop_hvac_floor_area_served_interior_zones(air_loop_hvac) ext_area_served_m2 = air_loop_hvac_floor_area_served_exterior_zones(air_loop_hvac) # Check the floor area exception if int_area_served_m2 < min_int_area_served_m2 && ext_area_served_m2 < min_ext_area_served_m2 if min_int_area_served_ft2 == infinity_ft2 && min_ext_area_served_ft2 == infinity_ft2 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Economizer not required for climate zone #{climate_zone}.") else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Economizer not required for because the interior area served of #{int_area_served_m2} ft2 < minimum of #{min_int_area_served_m2} and the perimeter area served of #{ext_area_served_m2} ft2 < minimum of #{min_ext_area_served_m2} for climate zone #{climate_zone}.") end return economizer_required end # If here, economizer required economizer_required = true OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Economizer required for the performance rating method baseline.") return economizer_required end |
#air_loop_hvac_prm_economizer_type_and_limits(air_loop_hvac, climate_zone) ⇒ Array<Double>
Determine the economizer type and limits for the the PRM Defaults to 90.1-2007 logic.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1089 def air_loop_hvac_prm_economizer_type_and_limits(air_loop_hvac, climate_zone) economizer_type = 'NoEconomizer' drybulb_limit_f = nil enthalpy_limit_btu_per_lb = nil dewpoint_limit_f = nil case climate_zone when 'ASHRAE 169-2006-1B', 'ASHRAE 169-2006-2B', 'ASHRAE 169-2006-3B', 'ASHRAE 169-2006-3C', 'ASHRAE 169-2006-4B', 'ASHRAE 169-2006-4C', 'ASHRAE 169-2006-5B', 'ASHRAE 169-2006-5C', 'ASHRAE 169-2006-6B', 'ASHRAE 169-2006-7B', 'ASHRAE 169-2006-8A', 'ASHRAE 169-2006-8B' economizer_type = 'FixedDryBulb' drybulb_limit_f = 75 when 'ASHRAE 169-2006-5A', 'ASHRAE 169-2006-6A', 'ASHRAE 169-2006-7A' economizer_type = 'FixedDryBulb' drybulb_limit_f = 70 else economizer_type = 'FixedDryBulb' drybulb_limit_f = 65 end return [economizer_type, drybulb_limit_f, enthalpy_limit_btu_per_lb, dewpoint_limit_f] end |
#air_loop_hvac_remove_motorized_oa_damper(air_loop_hvac) ⇒ Object
Remove a motorized OA damper by modifying the OA schedule to require full OA at all times. Whenever the fan operates, the damper will be open and OA will be brought into the building. This reflects the use of a backdraft gravity damper, and increases building loads unnecessarily during unoccupied hours.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2228 def air_loop_hvac_remove_motorized_oa_damper(air_loop_hvac) # Get the OA system and OA controller oa_sys = air_loop_hvac.airLoopHVACOutdoorAirSystem if oa_sys.is_initialized oa_sys = oa_sys.get else return false # No OA system end oa_control = oa_sys.getControllerOutdoorAir # Set the minimum OA schedule to always 1 (100%) oa_control.setMinimumOutdoorAirSchedule(air_loop_hvac.model.alwaysOnDiscreteSchedule) return true end |
#air_loop_hvac_single_zone_controls_num_stages(air_loop_hvac, climate_zone) ⇒ Integer
Determine the number of stages that should be used as controls for single zone DX systems. Defaults to zero, which means that no special single zone control is required.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2843 def air_loop_hvac_single_zone_controls_num_stages(air_loop_hvac, climate_zone) num_stages = 0 return num_stages end |
#air_loop_hvac_static_pressure_reset_required?(air_loop_hvac, has_ddc) ⇒ Boolean
Instead of requiring the input of whether a system has DDC control of VAV terminals or not, determine this from the system itself. This may require additional information be added to the OpenStudio data model.
Determine if static pressure reset is required for this system. For 90.1, this determination needs information about whether or not the system has DDC control over the VAV terminals. Defaults to 90.1-2007 logic.
over VAV terminals. return [Bool] returns true if static pressure reset is required, false if not
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2860 def air_loop_hvac_static_pressure_reset_required?(air_loop_hvac, has_ddc) sp_reset_required = false if has_ddc sp_reset_required = true OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Static pressure reset is required because the system has DDC control of VAV terminals.") else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Static pressure reset not required because the system does not have DDC control of VAV terminals.") end return sp_reset_required end |
#air_loop_hvac_supply_air_temperature_reset_required?(air_loop_hvac, climate_zone) ⇒ Bool
Determine if the system required supply air temperature (SAT) reset. Defaults to 90.1-2007, no SAT reset required.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1838 def air_loop_hvac_supply_air_temperature_reset_required?(air_loop_hvac, climate_zone) is_sat_reset_required = false return is_sat_reset_required end |
#air_loop_hvac_supply_return_exhaust_relief_fans(air_loop_hvac) ⇒ Array
Get all of the supply, return, exhaust, and relief fans on this system
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 395 def air_loop_hvac_supply_return_exhaust_relief_fans(air_loop_hvac) # Fans on the supply side of the airloop directly, or inside of unitary equipment. fans = [] sup_and_oa_comps = air_loop_hvac.supplyComponents sup_and_oa_comps += air_loop_hvac.oaComponents sup_and_oa_comps.each do |comp| if comp.to_FanConstantVolume.is_initialized fans << comp.to_FanConstantVolume.get elsif comp.to_FanVariableVolume.is_initialized fans << comp.to_FanVariableVolume.get elsif comp.to_AirLoopHVACUnitaryHeatCoolVAVChangeoverBypass.is_initialized sup_fan = comp.to_AirLoopHVACUnitaryHeatCoolVAVChangeoverBypass.get.supplyAirFan if sup_fan.to_FanConstantVolume.is_initialized fans << sup_fan.to_FanConstantVolume.get elsif sup_fan.to_FanOnOff.is_initialized fans << sup_fan.to_FanOnOff.get end elsif comp.to_AirLoopHVACUnitarySystem.is_initialized sup_fan = comp.to_AirLoopHVACUnitarySystem.get.supplyFan next if sup_fan.empty? sup_fan = sup_fan.get if sup_fan.to_FanConstantVolume.is_initialized fans << sup_fan.to_FanConstantVolume.get elsif sup_fan.to_FanOnOff.is_initialized fans << sup_fan.to_FanOnOff.get elsif sup_fan.to_FanVariableVolume.is_initialized fans << sup_fan.to_FanVariableVolume.get end end end return fans end |
#air_loop_hvac_system_fan_brake_horsepower(air_loop_hvac, include_terminal_fans = true) ⇒ Double
Determine the total brake horsepower of the fans on the system with or without the fans inside of fan powered terminals.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 435 def air_loop_hvac_system_fan_brake_horsepower(air_loop_hvac, include_terminal_fans = true) # TODO: get the template from the parent model itself? # Or not because maybe you want to see the difference between two standards? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "#{air_loop_hvac.name}-Determining #{template} allowable system fan power.") # Get all fans fans = [] # Supply, exhaust, relief, and return fans fans += air_loop_hvac_supply_return_exhaust_relief_fans(air_loop_hvac) # Fans inside of fan-powered terminals if include_terminal_fans air_loop_hvac.demandComponents.each do |comp| if comp.to_AirTerminalSingleDuctSeriesPIUReheat.is_initialized term_fan = comp.to_AirTerminalSingleDuctSeriesPIUReheat.get.supplyAirFan if term_fan.to_FanConstantVolume.is_initialized fans << term_fan.to_FanConstantVolume.get end elsif comp.to_AirTerminalSingleDuctParallelPIUReheat.is_initialized term_fan = comp.to_AirTerminalSingleDuctParallelPIUReheat.get.fan if term_fan.to_FanConstantVolume.is_initialized fans << term_fan.to_FanConstantVolume.get end end end end # Loop through all fans on the system and # sum up their brake horsepower values. sys_fan_bhp = 0 fans.sort.each do |fan| sys_fan_bhp += fan_brake_horsepower(fan) end return sys_fan_bhp end |
#air_loop_hvac_system_multiplier(air_loop_hvac) ⇒ Integer
Determine if every zone on the system has an identical multiplier. If so, return this number. If not, return 1.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 3110 def air_loop_hvac_system_multiplier(air_loop_hvac) mult = 1 # Get all the zone multipliers zn_mults = [] air_loop_hvac.thermalZones.each do |zone| zn_mults << zone.multiplier end # Warn if there are different multipliers uniq_mults = zn_mults.uniq if uniq_mults.size > 1 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: not all zones on the system have an identical zone multiplier. Multipliers are: #{uniq_mults.join(', ')}.") else mult = uniq_mults[0] end return mult end |
#air_loop_hvac_terminal_reheat?(air_loop_hvac) ⇒ Bool
Determine if the system has terminal reheat
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2006 def air_loop_hvac_terminal_reheat?(air_loop_hvac) has_term_rht = false air_loop_hvac.demandComponents.each do |sc| if sc.to_AirTerminalSingleDuctConstantVolumeReheat.is_initialized || sc.to_AirTerminalSingleDuctParallelPIUReheat.is_initialized || sc.to_AirTerminalSingleDuctSeriesPIUReheat.is_initialized || sc.to_AirTerminalSingleDuctVAVHeatAndCoolReheat.is_initialized || sc.to_AirTerminalSingleDuctVAVReheat.is_initialized has_term_rht = true break end end return has_term_rht end |
#air_loop_hvac_total_cooling_capacity(air_loop_hvac) ⇒ Double
Change to pull water coil nominal capacity instead of design load; not a huge difference, but water coil nominal capacity not available in sizing table.
Handle all additional cooling coil types. Currently only handles CoilCoolingDXSingleSpeed, CoilCoolingDXTwoSpeed, and CoilCoolingWater
Get the total cooling capacity for the air loop
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 562 def air_loop_hvac_total_cooling_capacity(air_loop_hvac) # Sum the cooling capacity for all cooling components # on the airloop, which may be inside of unitary systems. total_cooling_capacity_w = 0 air_loop_hvac.supplyComponents.each do |sc| # CoilCoolingDXSingleSpeed if sc.to_CoilCoolingDXSingleSpeed.is_initialized coil = sc.to_CoilCoolingDXSingleSpeed.get if coil.ratedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.ratedTotalCoolingCapacity.get elsif coil.autosizedRatedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.autosizedRatedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} capacity of #{coil.name} is not available, total cooling capacity of air loop will be incorrect when applying standard.") end # CoilCoolingDXTwoSpeed elsif sc.to_CoilCoolingDXTwoSpeed.is_initialized coil = sc.to_CoilCoolingDXTwoSpeed.get if coil.ratedHighSpeedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.ratedHighSpeedTotalCoolingCapacity.get elsif coil.autosizedRatedHighSpeedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.autosizedRatedHighSpeedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} capacity of #{coil.name} is not available, total cooling capacity of air loop will be incorrect when applying standard.") end # CoilCoolingWater elsif sc.to_CoilCoolingWater.is_initialized coil = sc.to_CoilCoolingWater.get if coil.autosizedDesignCoilLoad.is_initialized # TODO: Change to pull water coil nominal capacity instead of design load total_cooling_capacity_w += coil.autosizedDesignCoilLoad.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} capacity of #{coil.name} is not available, total cooling capacity of air loop will be incorrect when applying standard.") end # CoilCoolingWaterToAirHeatPumpEquationFit elsif sc.to_CoilCoolingWaterToAirHeatPumpEquationFit.is_initialized coil = sc.to_CoilCoolingWaterToAirHeatPumpEquationFit.get if coil.ratedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.ratedTotalCoolingCapacity.get elsif coil.autosizedRatedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.autosizedRatedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} capacity of #{coil.name} is not available, total cooling capacity of air loop will be incorrect when applying standard.") end elsif sc.to_AirLoopHVACUnitarySystem.is_initialized unitary = sc.to_AirLoopHVACUnitarySystem.get if unitary.coolingCoil.is_initialized clg_coil = unitary.coolingCoil.get # CoilCoolingDXSingleSpeed if clg_coil.to_CoilCoolingDXSingleSpeed.is_initialized coil = clg_coil.to_CoilCoolingDXSingleSpeed.get if coil.ratedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.ratedTotalCoolingCapacity.get elsif coil.autosizedRatedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.autosizedRatedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} capacity of #{coil.name} is not available, total cooling capacity of air loop will be incorrect when applying standard.") end # CoilCoolingDXTwoSpeed elsif clg_coil.to_CoilCoolingDXTwoSpeed.is_initialized coil = clg_coil.to_CoilCoolingDXTwoSpeed.get if coil.ratedHighSpeedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.ratedHighSpeedTotalCoolingCapacity.get elsif coil.autosizedRatedHighSpeedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.autosizedRatedHighSpeedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} capacity of #{coil.name} is not available, total cooling capacity of air loop will be incorrect when applying standard.") end # CoilCoolingWater elsif clg_coil.to_CoilCoolingWater.is_initialized coil = clg_coil.to_CoilCoolingWater.get if coil.autosizedDesignCoilLoad.is_initialized # TODO: Change to pull water coil nominal capacity instead of design load total_cooling_capacity_w += coil.autosizedDesignCoilLoad.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} capacity of #{coil.name} is not available, total cooling capacity of air loop will be incorrect when applying standard.") end # CoilCoolingWaterToAirHeatPumpEquationFit elsif clg_coil.to_CoilCoolingWaterToAirHeatPumpEquationFit.is_initialized coil = clg_coil.to_CoilCoolingWaterToAirHeatPumpEquationFit.get if coil.ratedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.ratedTotalCoolingCapacity.get elsif coil.autosizedRatedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.autosizedRatedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} capacity of #{coil.name} is not available, total cooling capacity of air loop will be incorrect when applying standard.") end end end elsif sc.to_AirLoopHVACUnitaryHeatPumpAirToAir.is_initialized unitary = sc.to_AirLoopHVACUnitaryHeatPumpAirToAir.get clg_coil = unitary.coolingCoil # CoilCoolingDXSingleSpeed if clg_coil.to_CoilCoolingDXSingleSpeed.is_initialized coil = clg_coil.to_CoilCoolingDXSingleSpeed.get if coil.ratedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.ratedTotalCoolingCapacity.get elsif coil.autosizedRatedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.autosizedRatedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} capacity of #{coil.name} is not available, total cooling capacity of air loop will be incorrect when applying standard.") end # CoilCoolingDXTwoSpeed elsif clg_coil.to_CoilCoolingDXTwoSpeed.is_initialized coil = clg_coil.to_CoilCoolingDXTwoSpeed.get if coil.ratedHighSpeedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.ratedHighSpeedTotalCoolingCapacity.get elsif coil.autosizedRatedHighSpeedTotalCoolingCapacity.is_initialized total_cooling_capacity_w += coil.autosizedRatedHighSpeedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} capacity of #{coil.name} is not available, total cooling capacity of air loop will be incorrect when applying standard.") end # CoilCoolingWater elsif clg_coil.to_CoilCoolingWater.is_initialized coil = clg_coil.to_CoilCoolingWater.get if coil.autosizedDesignCoilLoad.is_initialized # TODO: Change to pull water coil nominal capacity instead of design load total_cooling_capacity_w += coil.autosizedDesignCoilLoad.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name} capacity of #{coil.name} is not available, total cooling capacity of air loop will be incorrect when applying standard.") end end elsif sc.to_CoilCoolingDXMultiSpeed.is_initialized || sc.to_CoilCoolingCooledBeam.is_initialized || sc.to_AirLoopHVACUnitaryHeatCoolVAVChangeoverBypass.is_initialized || sc.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.is_initialized || sc.to_AirLoopHVACUnitarySystem.is_initialized OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "#{air_loop_hvac.name} has a cooling coil named #{sc.name}, whose type is not yet covered by economizer checks.") # CoilCoolingDXMultiSpeed # CoilCoolingCooledBeam # CoilCoolingWaterToAirHeatPumpEquationFit # AirLoopHVACUnitaryHeatCoolVAVChangeoverBypass # AirLoopHVACUnitaryHeatPumpAirToAir # AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed # AirLoopHVACUnitarySystem end end return total_cooling_capacity_w end |
#air_loop_hvac_unoccupied_fan_shutoff_required?(air_loop_hvac) ⇒ Bool
Determine if a system’s fans must shut off when not required.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2877 def air_loop_hvac_unoccupied_fan_shutoff_required?(air_loop_hvac) shutoff_required = true # Per 90.1 6.4.3.4.5, systems less than 0.75 HP # must turn off when unoccupied. minimum_fan_hp = 0.75 # Determine the system fan horsepower total_hp = 0.0 air_loop_hvac_supply_return_exhaust_relief_fans(air_loop_hvac).each do |fan| total_hp += fan_motor_horsepower(fan) end # Check the HP exception if total_hp < minimum_fan_hp shutoff_required = false OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{air_loop_hvac.name}: Unoccupied fan shutoff not required because system fan HP of #{total_hp.round(2)} HP is less than the minimum threshold of #{minimum_fan_hp} HP.") end return shutoff_required end |
#air_loop_hvac_vav_damper_action(air_loop_hvac) ⇒ String
Determine whether the VAV damper control is single maximum or dual maximum control. Defults to 90.1-2007.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 2100 def air_loop_hvac_vav_damper_action(air_loop_hvac) damper_action = 'Dual Maximum' return damper_action end |
#air_loop_hvac_vav_system?(air_loop_hvac) ⇒ Boolean
Determine if the system is a VAV system based on the fan which may be inside of a unitary system.
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# File 'lib/openstudio-standards/standards/Standards.AirLoopHVAC.rb', line 1957 def air_loop_hvac_vav_system?(air_loop_hvac) is_vav = false air_loop_hvac.supplyComponents.reverse.each do |comp| if comp.to_FanVariableVolume.is_initialized is_vav = true elsif comp.to_AirLoopHVACUnitaryHeatCoolVAVChangeoverBypass.is_initialized fan = comp.to_AirLoopHVACUnitaryHeatCoolVAVChangeoverBypass.get.supplyAirFan if fan.to_FanVariableVolume.is_initialized is_vav = true end elsif comp.to_AirLoopHVACUnitarySystem.is_initialized fan = comp.to_AirLoopHVACUnitarySystem.get.supplyFan if fan.is_initialized if fan.get.to_FanVariableVolume.is_initialized is_vav = true end end end end return is_vav end |
#air_terminal_single_duct_parallel_piu_reheat_apply_prm_baseline_fan_power(air_terminal_single_duct_parallel_piu_reheat) ⇒ Bool
Sets the fan power of a PIU fan based on the W/cfm specified in the standard.
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# File 'lib/openstudio-standards/standards/Standards.AirTerminalSingleDuctParallelPIUReheat.rb', line 8 def air_terminal_single_duct_parallel_piu_reheat_apply_prm_baseline_fan_power(air_terminal_single_duct_parallel_piu_reheat) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.AirTerminalSingleDuctParallelPIUReheat', "Setting PIU fan power for #{air_terminal_single_duct_parallel_piu_reheat.name}.") # Determine the fan sizing flow rate, min flow rate, # and W/cfm sec_flow_frac = 0.5 min_flow_frac = 0.3 fan_efficacy_w_per_cfm = 0.35 # Convert efficacy to metric # 1 cfm = 0.0004719 m^3/s fan_efficacy_w_per_m3_per_s = fan_efficacy_w_per_cfm / 0.0004719 # Get the maximum flow rate through the terminal max_primary_air_flow_rate = nil if air_terminal_single_duct_parallel_piu_reheat.autosizedMaximumPrimaryAirFlowRate.is_initialized max_primary_air_flow_rate = air_terminal_single_duct_parallel_piu_reheat.autosizedMaximumPrimaryAirFlowRate.get elsif air_terminal_single_duct_parallel_piu_reheat.maximumPrimaryAirFlowRate.is_initialized max_primary_air_flow_rate = air_terminal_single_duct_parallel_piu_reheat.maximumPrimaryAirFlowRate.get end # Set the max secondary air flow rate max_sec_flow_rate_m3_per_s = max_primary_air_flow_rate * sec_flow_frac air_terminal_single_duct_parallel_piu_reheat.setMaximumSecondaryAirFlowRate(max_sec_flow_rate_m3_per_s) max_sec_flow_rate_cfm = OpenStudio.convert(max_sec_flow_rate_m3_per_s, 'm^3/s', 'ft^3/min').get # Set the minimum flow fraction # TODO Also compare to min OA requirement air_terminal_single_duct_parallel_piu_reheat.setMinimumPrimaryAirFlowFraction(min_flow_frac) # Get the fan fan = air_terminal_single_duct_parallel_piu_reheat.fan.to_FanConstantVolume.get # Set the impeller efficiency fan_change_impeller_efficiency(fan, fan_baseline_impeller_efficiency(fan)) # Set the motor efficiency, preserving the impeller efficency. # For terminal fans, a bhp lookup of 0.5bhp is always used because # they are assumed to represent a series of small fans in reality. fan_apply_standard_minimum_motor_efficiency(fan, fan_brake_horsepower(fan)) # Calculate a new pressure rise to hit the target W/cfm fan_tot_eff = fan.fanEfficiency fan_rise_new_pa = fan_efficacy_w_per_m3_per_s * fan_tot_eff fan.setPressureRise(fan_rise_new_pa) # Calculate the newly set efficacy fan_power_new_w = fan_rise_new_pa * max_sec_flow_rate_m3_per_s / fan_tot_eff fan_efficacy_new_w_per_cfm = fan_power_new_w / max_sec_flow_rate_cfm OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.AirTerminalSingleDuctParallelPIUReheat', "For #{air_terminal_single_duct_parallel_piu_reheat.name}: fan efficacy set to #{fan_efficacy_new_w_per_cfm.round(2)} W/cfm.") return true end |
#air_terminal_single_duct_vav_reheat_apply_initial_prototype_damper_position(air_terminal_single_duct_vav_reheat, building_type, zone_oa_per_area) ⇒ Bool
Set the initial minimum damper position based on OA rate of the space and the template. Defaults to basic behavior, but this method is overridden by all of the ASHRAE-based templates. Zones with low OA per area get lower initial guesses. Final position will be adjusted upward as necessary by Standards.AirLoopHVAC.apply_minimum_vav_damper_positions
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.AirTerminalSingleDuctVAVReheat.rb', line 13 def air_terminal_single_duct_vav_reheat_apply_initial_prototype_damper_position(air_terminal_single_duct_vav_reheat, building_type, zone_oa_per_area) vav_name = air_terminal_single_duct_vav_reheat.name.get min_damper_position = 0.3 # High OA zones # Determine whether or not to use the high minimum guess. # Cutoff was determined by correlating apparent minimum guesses # to OA rates in prototypes since not well documented in papers. if zone_oa_per_area > 0.001 # 0.001 m^3/s*m^2 = .196 cfm/ft2 min_damper_position = 0.7 end # Set the minimum flow fraction air_terminal_single_duct_vav_reheat.setConstantMinimumAirFlowFraction(min_damper_position) return true end |
#air_terminal_single_duct_vav_reheat_apply_minimum_damper_position(air_terminal_single_duct_vav_reheat, zone_min_oa = nil, has_ddc = true) ⇒ Bool
remove exception where older vintages don’t have minimum positions adjusted.
Set the minimum damper position based on OA rate of the space and the template. Zones with low OA per area get lower initial guesses. Final position will be adjusted upward as necessary by Standards.AirLoopHVAC.adjust_minimum_vav_damper_positions If supplied, this will be set as a minimum limit in addition to the minimum damper position. EnergyPlus will use the larger of the two values during sizing. which impacts the minimum damper position requirement.
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# File 'lib/openstudio-standards/standards/Standards.AirTerminalSingleDuctVAVReheat.rb', line 17 def air_terminal_single_duct_vav_reheat_apply_minimum_damper_position(air_terminal_single_duct_vav_reheat, zone_min_oa = nil, has_ddc = true) # Minimum damper position min_damper_position = air_terminal_single_duct_vav_reheat_minimum_damper_position(air_terminal_single_duct_vav_reheat, has_ddc) air_terminal_single_duct_vav_reheat.setConstantMinimumAirFlowFraction(min_damper_position) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.AirTerminalSingleDuctVAVReheat', "For #{air_terminal_single_duct_vav_reheat.name}: set minimum damper position to #{min_damper_position}.") # Minimum OA flow rate # If specified, will also add this limit # and the larger of the two will be used # for sizing. unless zone_min_oa.nil? air_terminal_single_duct_vav_reheat.setFixedMinimumAirFlowRate(zone_min_oa) end return true end |
#air_terminal_single_duct_vav_reheat_minimum_damper_position(air_terminal_single_duct_vav_reheat, has_ddc = false) ⇒ Object
Specifies the minimum damper position for VAV dampers. Defaults to 30%
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# File 'lib/openstudio-standards/standards/Standards.AirTerminalSingleDuctVAVReheat.rb', line 38 def air_terminal_single_duct_vav_reheat_minimum_damper_position(air_terminal_single_duct_vav_reheat, has_ddc = false) min_damper_position = 0.3 return min_damper_position end |
#air_terminal_single_duct_vav_reheat_reheat_type(air_terminal_single_duct_vav_reheat) ⇒ String
Determines whether the terminal has a NaturalGas, Electricity, or HotWater reheat coil. Electricity, or HotWater.
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# File 'lib/openstudio-standards/standards/Standards.AirTerminalSingleDuctVAVReheat.rb', line 62 def air_terminal_single_duct_vav_reheat_reheat_type(air_terminal_single_duct_vav_reheat) type = nil # Get the reheat coil rht_coil = air_terminal_single_duct_vav_reheat.reheatCoil if rht_coil.to_CoilHeatingElectric.is_initialized type = 'Electricity' elsif rht_coil.to_CoilHeatingWater.is_initialized type = 'HotWater' elsif rht_coil.to_CoilHeatingGas.is_initialized type = 'NaturalGas' end return type end |
#air_terminal_single_duct_vav_reheat_set_heating_cap(air_terminal_single_duct_vav_reheat) ⇒ Object
Sets the capacity of the reheat coil based on the minimum flow fraction, and the maximum flow rate.
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# File 'lib/openstudio-standards/standards/Standards.AirTerminalSingleDuctVAVReheat.rb', line 45 def air_terminal_single_duct_vav_reheat_set_heating_cap(air_terminal_single_duct_vav_reheat) flow_rate_fraction = air_terminal_single_duct_vav_reheat.constantMinimumAirFlowFraction if air_terminal_single_duct_vav_reheat.reheatCoil.to_CoilHeatingWater.is_initialized reheat_coil = air_terminal_single_duct_vav_reheat.reheatCoil.to_CoilHeatingWater.get if reheat_coil.autosizedRatedCapacity.to_f < 1.0e-6 cap = 1.2 * 1000.0 * air_terminal_single_duct_vav_reheat.constantMinimumAirFlowFraction * air_terminal_single_duct_vav_reheat.autosizedMaximumAirFlowRate.to_f * (18.0 - 13.0) reheat_coil.setPerformanceInputMethod('NominalCapacity') reheat_coil.setRatedCapacity(cap) air_terminal_single_duct_vav_reheat.setMaximumReheatAirTemperature(18.0) end end end |
#boiler_hot_water_apply_efficiency_and_curves(boiler_hot_water) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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# File 'lib/openstudio-standards/standards/Standards.BoilerHotWater.rb', line 114 def boiler_hot_water_apply_efficiency_and_curves(boiler_hot_water) successfully_set_all_properties = false # Define the criteria to find the boiler properties # in the hvac standards data set. search_criteria = boiler_hot_water_find_search_criteria(boiler_hot_water) fuel_type = search_criteria['fuel_type'] fluid_type = search_criteria['fluid_type'] # Get the capacity capacity_w = boiler_hot_water_find_capacity(boiler_hot_water) # Convert capacity to Btu/hr capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Get the boiler properties blr_props = model_find_object(standards_data['boilers'], search_criteria, capacity_btu_per_hr) unless blr_props OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.BoilerHotWater', "For #{boiler_hot_water.name}, cannot find boiler properties, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end # Make the EFFFPLR curve (not all boilers will have one) if blr_props['efffplr'] eff_fplr = model_add_curve(boiler_hot_water.model, blr_props['efffplr']) if eff_fplr boiler_hot_water.setNormalizedBoilerEfficiencyCurve(eff_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.BoilerHotWater', "For #{boiler_hot_water.name}, cannot find eff_fplr curve, will not be set.") successfully_set_all_properties = false end end # Get the minimum efficiency standards thermal_eff = nil # If specified as AFUE unless blr_props['minimum_annual_fuel_utilization_efficiency'].nil? min_afue = blr_props['minimum_annual_fuel_utilization_efficiency'] thermal_eff = afue_to_thermal_eff(min_afue) new_comp_name = "#{boiler_hot_water.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_afue} AFUE" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.BoilerHotWater', "For #{template}: #{boiler_hot_water.name}: #{fuel_type} #{fluid_type} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; AFUE = #{min_afue}") end # If specified as thermal efficiency unless blr_props['minimum_thermal_efficiency'].nil? thermal_eff = blr_props['minimum_thermal_efficiency'] new_comp_name = "#{boiler_hot_water.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{thermal_eff} Thermal Eff" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.BoilerHotWater', "For #{template}: #{boiler_hot_water.name}: #{fuel_type} #{fluid_type} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; Thermal Efficiency = #{thermal_eff}") end # If specified as combustion efficiency unless blr_props['minimum_combustion_efficiency'].nil? min_comb_eff = blr_props['minimum_combustion_efficiency'] thermal_eff = combustion_eff_to_thermal_eff(min_comb_eff) new_comp_name = "#{boiler_hot_water.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_comb_eff} Combustion Eff" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.BoilerHotWater', "For #{template}: #{boiler_hot_water.name}: #{fuel_type} #{fluid_type} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; Combustion Efficiency = #{min_comb_eff}") end # Set the name boiler_hot_water.setName(new_comp_name) # Set the efficiency values unless thermal_eff.nil? boiler_hot_water.setNominalThermalEfficiency(thermal_eff) end return successfully_set_all_properties end |
#boiler_hot_water_find_capacity(boiler_hot_water) ⇒ Double
Find capacity in W
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# File 'lib/openstudio-standards/standards/Standards.BoilerHotWater.rb', line 40 def boiler_hot_water_find_capacity(boiler_hot_water) capacity_w = nil if boiler_hot_water.nominalCapacity.is_initialized capacity_w = boiler_hot_water.nominalCapacity.get elsif boiler_hot_water.autosizedNominalCapacity.is_initialized capacity_w = boiler_hot_water.autosizedNominalCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.BoilerHotWater', "For #{boiler_hot_water.name} capacity is not available, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end return capacity_w end |
#boiler_hot_water_find_search_criteria(boiler_hot_water) ⇒ Hash
find search criteria
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# File 'lib/openstudio-standards/standards/Standards.BoilerHotWater.rb', line 8 def boiler_hot_water_find_search_criteria(boiler_hot_water) # Define the criteria to find the boiler properties # in the hvac standards data set. search_criteria = {} search_criteria['template'] = template # Get fuel type fuel_type = nil case boiler_hot_water.fuelType when 'NaturalGas' fuel_type = 'Gas' when 'Electricity' fuel_type = 'Electric' when 'FuelOil#1', 'FuelOil#2' fuel_type = 'Oil' else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.BoilerHotWater', "For #{boiler_hot_water.name}, a fuel type of #{fuelType} is not yet supported. Assuming 'Gas.'") fuel_type = 'Gas' end search_criteria['fuel_type'] = fuel_type # Get the fluid type fluid_type = 'Hot Water' search_criteria['fluid_type'] = fluid_type return search_criteria end |
#boiler_hot_water_standard_minimum_thermal_efficiency(boiler_hot_water, rename = false) ⇒ Double
Finds lookup object in standards and return minimum thermal efficiency
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# File 'lib/openstudio-standards/standards/Standards.BoilerHotWater.rb', line 58 def boiler_hot_water_standard_minimum_thermal_efficiency(boiler_hot_water, rename = false) # Get the boiler properties search_criteria = boiler_hot_water_find_search_criteria(boiler_hot_water) capacity_w = boiler_hot_water_find_capacity(boiler_hot_water) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Get the minimum efficiency standards thermal_eff = nil # Get the boiler properties blr_props = model_find_object(standards_data['boilers'], search_criteria, capacity_btu_per_hr) unless blr_props OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.BoilerHotWater', "For #{boiler_hot_water.name}, cannot find boiler properties, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end fuel_type = blr_props['fuel_type'] fluid_type = blr_props['fluid_type'] # If specified as AFUE unless blr_props['minimum_annual_fuel_utilization_efficiency'].nil? min_afue = blr_props['minimum_annual_fuel_utilization_efficiency'] thermal_eff = afue_to_thermal_eff(min_afue) new_comp_name = "#{boiler_hot_water.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_afue} AFUE" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.BoilerHotWater', "For #{template}: #{boiler_hot_water.name}: #{fuel_type} #{fluid_type} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; AFUE = #{min_afue}") end # If specified as thermal efficiency unless blr_props['minimum_thermal_efficiency'].nil? thermal_eff = blr_props['minimum_thermal_efficiency'] new_comp_name = "#{boiler_hot_water.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{thermal_eff} Thermal Eff" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.BoilerHotWater', "For #{template}: #{boiler_hot_water.name}: #{fuel_type} #{fluid_type} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; Thermal Efficiency = #{thermal_eff}") end # If specified as combustion efficiency unless blr_props['minimum_combustion_efficiency'].nil? min_comb_eff = blr_props['minimum_combustion_efficiency'] thermal_eff = combustion_eff_to_thermal_eff(min_comb_eff) new_comp_name = "#{boiler_hot_water.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_comb_eff} Combustion Eff" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.BoilerHotWater', "For #{template}: #{boiler_hot_water.name}: #{fuel_type} #{fluid_type} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; Combustion Efficiency = #{min_comb_eff}") end # Rename if rename boiler_hot_water.setName(new_comp_name) end return thermal_eff end |
#building_story_floor_multiplier(building_story) ⇒ Integer
Checks all spaces on this story that are part of the total floor area to see if they have the same multiplier. If they do, assume that the multipliers are being used as a floor multiplier.
returning 1 if no floor multiplier.
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# File 'lib/openstudio-standards/standards/Standards.BuildingStory.rb', line 11 def building_story_floor_multiplier(building_story) floor_multiplier = 1 # Determine the multipliers for all spaces multipliers = [] building_story.spaces.each do |space| # Ignore spaces that aren't part of the total floor area next unless space.partofTotalFloorArea multipliers << space.multiplier end # If there are no spaces on this story, assume # a multiplier of 1 if multipliers.size.zero? return floor_multiplier end # Calculate the average multiplier and # then convert to integer. avg_multiplier = (multipliers.inject { |a, e| a + e }.to_f / multipliers.size).to_i # If the multiplier is greater than 1, report this if avg_multiplier > 1 floor_multiplier = avg_multiplier OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.BuildingStory', "Story #{building_story.name} has a multiplier of #{floor_multiplier}.") end return floor_multiplier end |
#building_story_minimum_z_value(building_story) ⇒ Double
Gets the minimum z-value of the story. This is considered to be the minimum z value of any vertex of any surface of any space on the story, with the exception of plenum spaces.
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# File 'lib/openstudio-standards/standards/Standards.BuildingStory.rb', line 47 def building_story_minimum_z_value(building_story) z_heights = [] building_story.spaces.each do |space| # Skip plenum spaces next if space_plenum?(space) # Get the z value of the space, which # vertices in space surfaces are relative to. z_origin = space.zOrigin # loop through space surfaces to find min z value space.surfaces.each do |surface| surface.vertices.each do |vertex| z_heights << vertex.z + z_origin end end end # Error if no z heights were found z = 999.9 if !z_heights.empty? z = z_heights.min else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "For #{building_story.name} could not find the minimum_z_value, which means the story has no spaces assigned or the spaces have no surfaces.") end return z end |
#chiller_electric_eir_apply_efficiency_and_curves(chiller_electric_eir, clg_tower_objs) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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# File 'lib/openstudio-standards/standards/Standards.ChillerElectricEIR.rb', line 98 def chiller_electric_eir_apply_efficiency_and_curves(chiller_electric_eir, clg_tower_objs) chillers = standards_data['chillers'] # Define the criteria to find the chiller properties # in the hvac standards data set. search_criteria = chiller_electric_eir_find_search_criteria(chiller_electric_eir) cooling_type = search_criteria['cooling_type'] condenser_type = search_criteria['condenser_type'] compressor_type = search_criteria['compressor_type'] # Get the chiller capacity capacity_w = chiller_electric_eir_find_capacity(chiller_electric_eir) # Convert capacity to tons capacity_tons = OpenStudio.convert(capacity_w, 'W', 'ton').get # Get the chiller properties chlr_props = model_find_object(chillers, search_criteria, capacity_tons, Date.today) unless chlr_props OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ChillerElectricEIR', "For #{chiller_electric_eir.name}, cannot find chiller properties using #{search_criteria}, cannot apply standard efficiencies or curves.") successfully_set_all_properties = false return successfully_set_all_properties end # Make the CAPFT curve cool_cap_ft = model_add_curve(chiller_electric_eir.model, chlr_props['capft']) if cool_cap_ft chiller_electric_eir.setCoolingCapacityFunctionOfTemperature(cool_cap_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ChillerElectricEIR', "For #{chiller_electric_eir.name}, cannot find cool_cap_ft curve, will not be set.") successfully_set_all_properties = false end # Make the EIRFT curve cool_eir_ft = model_add_curve(chiller_electric_eir.model, chlr_props['eirft']) if cool_eir_ft chiller_electric_eir.setElectricInputToCoolingOutputRatioFunctionOfTemperature(cool_eir_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ChillerElectricEIR', "For #{chiller_electric_eir.name}, cannot find cool_eir_ft curve, will not be set.") successfully_set_all_properties = false end # Make the EIRFPLR curve # which may be either a CurveBicubic or a CurveQuadratic based on chiller type cool_plf_fplr = model_add_curve(chiller_electric_eir.model, chlr_props['eirfplr']) if cool_plf_fplr chiller_electric_eir.setElectricInputToCoolingOutputRatioFunctionOfPLR(cool_plf_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ChillerElectricEIR', "For #{chiller_electric_eir.name}, cannot find cool_plf_fplr curve, will not be set.") successfully_set_all_properties = false end # Set the efficiency value kw_per_ton = nil cop = nil if chlr_props['minimum_full_load_efficiency'] kw_per_ton = chlr_props['minimum_full_load_efficiency'] cop = kw_per_ton_to_cop(kw_per_ton) chiller_electric_eir.setReferenceCOP(cop) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ChillerElectricEIR', "For #{chiller_electric_eir.name}, cannot find minimum full load efficiency, will not be set.") successfully_set_all_properties = false end # Append the name with size and kw/ton chiller_electric_eir.setName("#{chiller_electric_eir.name} #{capacity_tons.round}tons #{kw_per_ton.round(1)}kW/ton") OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.ChillerElectricEIR', "For #{template}: #{chiller_electric_eir.name}: #{cooling_type} #{condenser_type} #{compressor_type} Capacity = #{capacity_tons.round}tons; COP = #{cop.round(1)} (#{kw_per_ton.round(1)}kW/ton)") return successfully_set_all_properties end |
#chiller_electric_eir_find_capacity(chiller_electric_eir) ⇒ Double
Finds capacity in W
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# File 'lib/openstudio-standards/standards/Standards.ChillerElectricEIR.rb', line 58 def chiller_electric_eir_find_capacity(chiller_electric_eir) capacity_w = nil if chiller_electric_eir.referenceCapacity.is_initialized capacity_w = chiller_electric_eir.referenceCapacity.get elsif chiller_electric_eir.autosizedReferenceCapacity.is_initialized capacity_w = chiller_electric_eir.autosizedReferenceCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ChillerElectricEIR', "For #{chiller_electric_eir.name} capacity is not available, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end return capacity_w end |
#chiller_electric_eir_find_search_criteria(chiller_electric_eir) ⇒ hash
Finds the search criteria
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# File 'lib/openstudio-standards/standards/Standards.ChillerElectricEIR.rb', line 8 def chiller_electric_eir_find_search_criteria(chiller_electric_eir) search_criteria = {} search_criteria['template'] = template # Determine if WaterCooled or AirCooled by # checking if the chiller is connected to a condenser # water loop or not. Use name as fallback for exporting HVAC library. cooling_type = 'AirCooled' if chiller_electric_eir.secondaryPlantLoop.is_initialized || chiller_electric_eir.name.get.to_s.include?('WaterCooled') cooling_type = 'WaterCooled' end search_criteria['cooling_type'] = cooling_type # TODO: Standards replace this with a mechanism to store this # data in the chiller object itself. # For now, retrieve the condenser type from the name name = chiller_electric_eir.name.get condenser_type = nil compressor_type = nil if cooling_type == 'AirCooled' if name.include?('WithCondenser') condenser_type = 'WithCondenser' elsif name.include?('WithoutCondenser') condenser_type = 'WithoutCondenser' end elsif cooling_type == 'WaterCooled' if name.include?('Reciprocating') compressor_type = 'Reciprocating' elsif name.include?('Rotary Screw') compressor_type = 'Rotary Screw' elsif name.include?('Scroll') compressor_type = 'Scroll' elsif name.include?('Centrifugal') compressor_type = 'Centrifugal' end end unless condenser_type.nil? search_criteria['condenser_type'] = condenser_type end unless compressor_type.nil? search_criteria['compressor_type'] = compressor_type end return search_criteria end |
#chiller_electric_eir_standard_minimum_full_load_efficiency(chiller_electric_eir) ⇒ Double
Finds lookup object in standards and return full load efficiency
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# File 'lib/openstudio-standards/standards/Standards.ChillerElectricEIR.rb', line 76 def chiller_electric_eir_standard_minimum_full_load_efficiency(chiller_electric_eir) # Get the chiller properties search_criteria = chiller_electric_eir_find_search_criteria(chiller_electric_eir) capacity_tons = OpenStudio.convert(chiller_electric_eir_find_capacity(chiller_electric_eir), 'W', 'ton').get chlr_props = model_find_object(standards_data['chillers'], search_criteria, capacity_tons, Date.today) # lookup the efficiency value kw_per_ton = nil cop = nil if chlr_props['minimum_full_load_efficiency'] kw_per_ton = chlr_props['minimum_full_load_efficiency'] cop = kw_per_ton_to_cop(kw_per_ton) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ChillerElectricEIR', "For #{chiller_electric_eir.name}, cannot find minimum full load efficiency.") end return cop end |
#coil_cooling_dx_multi_speed_apply_efficiency_and_curves(coil_cooling_dx_multi_speed, sql_db_vars_map) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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# File 'lib/openstudio-standards/standards/Standards.CoilCoolingDXMultiSpeed.rb', line 8 def coil_cooling_dx_multi_speed_apply_efficiency_and_curves(coil_cooling_dx_multi_speed, sql_db_vars_map) successfully_set_all_properties = true # Define the criteria to find the chiller properties # in the hvac standards data set. search_criteria = {} search_criteria['template'] = template cooling_type = coil_cooling_dx_multi_speed.condenserType search_criteria['cooling_type'] = cooling_type # TODO: Standards - add split system vs single package to model # For now, assume single package as default sub_category = 'Single Package' # Determine the heating type if unitary or zone hvac heat_pump = false heating_type = nil containing_comp = nil if coil_cooling_dx_multi_speed.airLoopHVAC.empty? if coil_cooling_dx_multi_speed.containingHVACComponent.is_initialized containing_comp = coil_cooling_dx_multi_speed.containingHVACComponent.get if containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.is_initialized htg_coil = containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.get.heatingCoil if htg_coil.to_CoilHeatingDXMultiSpeed.is_initialized heat_pump = true heating_type = 'Electric Resistance or None' elsif htg_coil.to_CoilHeatingGasMultiStage.is_initialized heating_type = 'All Other' end end # TODO: Add other unitary systems elsif coil_cooling_dx_multi_speed.containingZoneHVACComponent.is_initialized containing_comp = coil_cooling_dx_multi_speed.containingZoneHVACComponent.get if containing_comp.to_ZoneHVACPackagedTerminalAirConditioner.is_initialized sub_category = 'PTAC' htg_coil = containing_comp.to_ZoneHVACPackagedTerminalAirConditioner.get.heatingCoil if htg_coil.to_CoilHeatingElectric.is_initialized heating_type = 'Electric Resistance or None' elsif htg_coil.to_CoilHeatingWater.is_initialized || htg_coil.to_CoilHeatingGas.is_initialized || htg_col.to_CoilHeatingGasMultiStage heating_type = 'All Other' end end # TODO: Add other zone hvac systems end end # Add the heating type to the search criteria unless heating_type.nil? search_criteria['heating_type'] = heating_type end search_criteria['subcategory'] = sub_category # Get the coil capacity capacity_w = nil clg_stages = stages if clg_stages.last.grossRatedTotalCoolingCapacity.is_initialized capacity_w = clg_stages.last.grossRatedTotalCoolingCapacity.get elsif coil_cooling_dx_multi_speed.autosizedSpeed4GrossRatedTotalCoolingCapacity.is_initialized capacity_w = coil_cooling_dx_multi_speed.autosizedSpeed4GrossRatedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{coil_cooling_dx_multi_speed.name} capacity is not available, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end # Volume flow rate flow_rate4 = nil if clg_stages.last.ratedAirFlowRate.is_initialized flow_rate4 = clg_stages.last.ratedAirFlowRate.get elsif coil_cooling_dx_multi_speed.autosizedSpeed4RatedAirFlowRate.is_initialized flow_rate4 = coil_cooling_dx_multi_speed.autosizedSpeed4RatedAirFlowRate.get end # Convert capacity to Btu/hr capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Lookup efficiencies depending on whether it is a unitary AC or a heat pump ac_props = nil ac_props = if heat_pump == true model_find_object(standards_data['heat_pumps'], search_criteria, capacity_btu_per_hr, Date.today) else model_find_object(standards_data['unitary_acs'], search_criteria, capacity_btu_per_hr, Date.today) end # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{coil_cooling_dx_multi_speed.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end # Make the COOL-CAP-FT curve cool_cap_ft = model_add_curve(model, ac_props['cool_cap_ft'], standards) if cool_cap_ft clg_stages.each do |stage| stage.setTotalCoolingCapacityFunctionofTemperatureCurve(cool_cap_ft) end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{coil_cooling_dx_multi_speed.name}, cannot find cool_cap_ft curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-CAP-FFLOW curve cool_cap_fflow = model_add_curve(model, ac_props['cool_cap_fflow'], standards) if cool_cap_fflow clg_stages.each do |stage| stage.setTotalCoolingCapacityFunctionofFlowFractionCurve(cool_cap_fflow) end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{coil_cooling_dx_multi_speed.name}, cannot find cool_cap_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FT curve cool_eir_ft = model_add_curve(model, ac_props['cool_eir_ft'], standards) if cool_eir_ft clg_stages.each do |stage| stage.setEnergyInputRatioFunctionofTemperatureCurve(cool_eir_ft) end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{coil_cooling_dx_multi_speed.name}, cannot find cool_eir_ft curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FFLOW curve cool_eir_fflow = model_add_curve(model, ac_props['cool_eir_fflow'], standards) if cool_eir_fflow clg_stages.each do |stage| stage.setEnergyInputRatioFunctionofFlowFractionCurve(cool_eir_fflow) end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{coil_cooling_dx_multi_speed.name}, cannot find cool_eir_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-PLF-FPLR curve cool_plf_fplr = model_add_curve(model, ac_props['cool_plf_fplr'], standards) if cool_plf_fplr clg_stages.each do |stage| stage.setPartLoadFractionCorrelationCurve(cool_plf_fplr) end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{coil_cooling_dx_multi_speed.name}, cannot find cool_plf_fplr curve, will not be set.") successfully_set_all_properties = false end # Get the minimum efficiency standards cop = nil if coil_dx_subcategory(coil_cooling_dx_multi_speed) == 'PTAC' ptac_eer_coeff_1 = ac_props['ptac_eer_coefficient_1'] ptac_eer_coeff_2 = ac_props['ptac_eer_coefficient_2'] capacity_btu_per_hr = 7000 if capacity_btu_per_hr < 7000 capacity_btu_per_hr = 15_000 if capacity_btu_per_hr > 15_000 ptac_eer = ptac_eer_coeff_1 + (ptac_eer_coeff_2 * capacity_btu_per_hr) cop = eer_to_cop(ptac_eer) # self.setName("#{self.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{ptac_eer}EER") new_comp_name = "#{coil_cooling_dx_multi_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{ptac_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{template}: #{coil_cooling_dx_multi_speed.name}: #{cooling_type} #{heating_type} #{subcategory} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{ptac_eer}") end # If specified as SEER unless ac_props['minimum_seasonal_energy_efficiency_ratio'].nil? min_seer = ac_props['minimum_seasonal_energy_efficiency_ratio'] cop = seer_to_cop(min_seer) new_comp_name = "#{coil_cooling_dx_multi_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER" # self.setName("#{self.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER") OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{template}: #{coil_cooling_dx_multi_speed.name}: #{cooling_type} #{heating_type} #{subcategory} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER unless ac_props['minimum_energy_efficiency_ratio'].nil? min_eer = ac_props['minimum_energy_efficiency_ratio'] cop = eer_to_cop(min_eer) new_comp_name = "#{coil_cooling_dx_multi_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{template}: #{coil_cooling_dx_multi_speed.name}: #{cooling_type} #{heating_type} #{subcategory} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # if specified as SEER (heat pump) unless ac_props['minimum_seasonal_efficiency'].nil? min_seer = ac_props['minimum_seasonal_efficiency'] cop = seer_to_cop(min_seer) new_comp_name = "#{coil_cooling_dx_multi_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER" # self.setName("#{self.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER") OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{template}: #{coil_cooling_dx_multi_speed.name}: #{cooling_type} #{heating_type} #{subcategory} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER (heat pump) unless ac_props['minimum_full_load_efficiency'].nil? min_eer = ac_props['minimum_full_load_efficiency'] cop = eer_to_cop(min_eer) new_comp_name = "#{coil_cooling_dx_multi_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{template}: #{coil_cooling_dx_multi_speed.name}: #{cooling_type} #{heating_type} #{subcategory} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end sql_db_vars_map[new_comp_name] = name.to_s coil_cooling_dx_multi_speed.setName(new_comp_name) # Set the efficiency values unless cop.nil? clg_stages.each do |istage| istage.setGrossRatedCoolingCOP(cop) end end return sql_db_vars_map end |
#coil_cooling_dx_single_speed_apply_efficiency_and_curves(coil_cooling_dx_single_speed, sql_db_vars_map) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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# File 'lib/openstudio-standards/standards/Standards.CoilCoolingDXSingleSpeed.rb', line 152 def coil_cooling_dx_single_speed_apply_efficiency_and_curves(coil_cooling_dx_single_speed, sql_db_vars_map) successfully_set_all_properties = true # Get the search criteria search_criteria = coil_dx_find_search_criteria(coil_cooling_dx_single_speed) # Get the capacity capacity_w = coil_cooling_dx_single_speed_find_capacity(coil_cooling_dx_single_speed) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Lookup efficiencies depending on whether it is a unitary AC or a heat pump ac_props = nil ac_props = if coil_dx_heat_pump?(coil_cooling_dx_single_speed) model_find_object(standards_data['heat_pumps'], search_criteria, capacity_btu_per_hr, Date.today) else model_find_object(standards_data['unitary_acs'], search_criteria, capacity_btu_per_hr, Date.today) end # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency standard.") successfully_set_all_properties = false return sql_db_vars_map end # Make the COOL-CAP-FT curve cool_cap_ft = model_add_curve(coil_cooling_dx_single_speed.model, ac_props['cool_cap_ft']) if cool_cap_ft coil_cooling_dx_single_speed.setTotalCoolingCapacityFunctionOfTemperatureCurve(cool_cap_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find cool_cap_ft curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-CAP-FFLOW curve cool_cap_fflow = model_add_curve(coil_cooling_dx_single_speed.model, ac_props['cool_cap_fflow']) if cool_cap_fflow coil_cooling_dx_single_speed.setTotalCoolingCapacityFunctionOfFlowFractionCurve(cool_cap_fflow) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find cool_cap_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FT curve cool_eir_ft = model_add_curve(coil_cooling_dx_single_speed.model, ac_props['cool_eir_ft']) if cool_eir_ft coil_cooling_dx_single_speed.setEnergyInputRatioFunctionOfTemperatureCurve(cool_eir_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find cool_eir_ft curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FFLOW curve cool_eir_fflow = model_add_curve(coil_cooling_dx_single_speed.model, ac_props['cool_eir_fflow']) if cool_eir_fflow coil_cooling_dx_single_speed.setEnergyInputRatioFunctionOfFlowFractionCurve(cool_eir_fflow) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find cool_eir_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-PLF-FPLR curve cool_plf_fplr = model_add_curve(coil_cooling_dx_single_speed.model, ac_props['cool_plf_fplr']) if cool_plf_fplr coil_cooling_dx_single_speed.setPartLoadFractionCorrelationCurve(cool_plf_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find cool_plf_fplr curve, will not be set.") successfully_set_all_properties = false end # Preserve the original name orig_name = coil_cooling_dx_single_speed.name.to_s # Find the minimum COP and rename with efficiency rating cop = coil_cooling_dx_single_speed_standard_minimum_cop(coil_cooling_dx_single_speed, true) # Map the original name to the new name sql_db_vars_map[coil_cooling_dx_single_speed.name.to_s] = orig_name # Set the efficiency values unless cop.nil? coil_cooling_dx_single_speed.setRatedCOP(OpenStudio::OptionalDouble.new(cop)) end return sql_db_vars_map end |
#coil_cooling_dx_single_speed_find_capacity(coil_cooling_dx_single_speed) ⇒ Double
Finds capacity in W
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# File 'lib/openstudio-standards/standards/Standards.CoilCoolingDXSingleSpeed.rb', line 10 def coil_cooling_dx_single_speed_find_capacity(coil_cooling_dx_single_speed) capacity_w = nil if coil_cooling_dx_single_speed.ratedTotalCoolingCapacity.is_initialized capacity_w = coil_cooling_dx_single_speed.ratedTotalCoolingCapacity.get elsif coil_cooling_dx_single_speed.autosizedRatedTotalCoolingCapacity.is_initialized capacity_w = coil_cooling_dx_single_speed.autosizedRatedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name} capacity is not available, cannot apply efficiency standard.") return 0.0 end # If it's a PTAC or PTHP System, we need to divide the capacity by the potential zone multiplier # because the COP is dependent on capacity, and the capacity should be the capacity of a single zone, not all the zones if ['PTAC', 'PTHP'].include?(coil_dx_subcategory(coil_cooling_dx_single_speed)) mult = 1 comp = coil_cooling_dx_single_speed.containingZoneHVACComponent if comp.is_initialized if comp.get.thermalZone.is_initialized mult = comp.get.thermalZone.get.multiplier if mult > 1 total_cap = capacity_w capacity_w /= mult OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, total capacity of #{OpenStudio.convert(total_cap, 'W', 'kBtu/hr').get.round(2)}kBTU/hr was divided by the zone multiplier of #{mult} to give #{capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get.round(2)}kBTU/hr.") end end end end return capacity_w end |
#coil_cooling_dx_single_speed_standard_minimum_cop(coil_cooling_dx_single_speed, rename = false) ⇒ Double
Finds lookup object in standards and return efficiency
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# File 'lib/openstudio-standards/standards/Standards.CoilCoolingDXSingleSpeed.rb', line 45 def coil_cooling_dx_single_speed_standard_minimum_cop(coil_cooling_dx_single_speed, rename = false) search_criteria = coil_dx_find_search_criteria(coil_cooling_dx_single_speed) cooling_type = search_criteria['cooling_type'] heating_type = search_criteria['heating_type'] sub_category = search_criteria['subcategory'] capacity_w = coil_cooling_dx_single_speed_find_capacity(coil_cooling_dx_single_speed) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Look up the efficiency characteristics # Lookup efficiencies depending on whether it is a unitary AC or a heat pump ac_props = nil ac_props = if coil_dx_heat_pump?(coil_cooling_dx_single_speed) model_find_object(standards_data['heat_pumps'], search_criteria, capacity_btu_per_hr, Date.today) else model_find_object(standards_data['unitary_acs'], search_criteria, capacity_btu_per_hr, Date.today) end # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end # Get the minimum efficiency standards cop = nil # If PTHP, use equations if coefficients are specified pthp_eer_coeff_1 = ac_props['pthp_eer_coefficient_1'] pthp_eer_coeff_2 = ac_props['pthp_eer_coefficient_2'] if sub_category == 'PTHP' && !pthp_eer_coeff_1.nil? && !pthp_eer_coeff_2.nil? # TABLE 6.8.1D # EER = pthp_eer_coeff_1 - (pthp_eer_coeff_2 * Cap / 1000) # Note c: Cap means the rated cooling capacity of the product in Btu/h. # If the unit's capacity is less than 7000 Btu/h, use 7000 Btu/h in the calculation. # If the unit's capacity is greater than 15,000 Btu/h, use 15,000 Btu/h in the calculation. eer_calc_cap_btu_per_hr = capacity_btu_per_hr eer_calc_cap_btu_per_hr = 7000 if capacity_btu_per_hr < 7000 eer_calc_cap_btu_per_hr = 15_000 if capacity_btu_per_hr > 15_000 pthp_eer = pthp_eer_coeff_1 - (pthp_eer_coeff_2 * eer_calc_cap_btu_per_hr / 1000.0) cop = eer_to_cop(pthp_eer, OpenStudio.convert(capacity_btu_per_hr, 'Btu/hr', 'W').get) new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{pthp_eer.round(1)}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}: #{cooling_type} #{heating_type} #{sub_category} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{pthp_eer.round(1)}") end # If PTAC, use equations if coefficients are specified ptac_eer_coeff_1 = ac_props['ptac_eer_coefficient_1'] ptac_eer_coeff_2 = ac_props['ptac_eer_coefficient_2'] if sub_category == 'PTAC' && !ptac_eer_coeff_1.nil? && !ptac_eer_coeff_2.nil? # TABLE 6.8.1D # EER = ptac_eer_coeff_1 - (ptac_eer_coeff_2 * Cap / 1000) # Note c: Cap means the rated cooling capacity of the product in Btu/h. # If the unit's capacity is less than 7000 Btu/h, use 7000 Btu/h in the calculation. # If the unit's capacity is greater than 15,000 Btu/h, use 15,000 Btu/h in the calculation. eer_calc_cap_btu_per_hr = capacity_btu_per_hr eer_calc_cap_btu_per_hr = 7000 if capacity_btu_per_hr < 7000 eer_calc_cap_btu_per_hr = 15_000 if capacity_btu_per_hr > 15_000 ptac_eer = ptac_eer_coeff_1 - (ptac_eer_coeff_2 * eer_calc_cap_btu_per_hr / 1000.0) cop = eer_to_cop(ptac_eer, OpenStudio.convert(capacity_btu_per_hr, 'Btu/hr', 'W').get) new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{ptac_eer.round(1)}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}: #{cooling_type} #{heating_type} #{sub_category} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{ptac_eer.round(1)}") end # If specified as SEER unless ac_props['minimum_seasonal_energy_efficiency_ratio'].nil? min_seer = ac_props['minimum_seasonal_energy_efficiency_ratio'] cop = seer_to_cop_cooling_no_fan(min_seer) new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_single_speed.name}: #{cooling_type} #{heating_type} #{sub_category} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER unless ac_props['minimum_energy_efficiency_ratio'].nil? min_eer = ac_props['minimum_energy_efficiency_ratio'] cop = eer_to_cop(min_eer, OpenStudio.convert(capacity_kbtu_per_hr, 'kBtu/hr', 'W').get) new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_single_speed.name}: #{cooling_type} #{heating_type} #{sub_category} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # if specified as SEER (heat pump) unless ac_props['minimum_seasonal_efficiency'].nil? min_seer = ac_props['minimum_seasonal_efficiency'] cop = seer_to_cop_cooling_no_fan(min_seer) new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_single_speed.name}: #{cooling_type} #{heating_type} #{sub_category} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER (heat pump) unless ac_props['minimum_full_load_efficiency'].nil? min_eer = ac_props['minimum_full_load_efficiency'] cop = eer_to_cop(min_eer, OpenStudio.convert(capacity_kbtu_per_hr, 'kBtu/hr', 'W').get) new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_single_speed.name}: #{cooling_type} #{heating_type} #{sub_category} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # Rename if rename coil_cooling_dx_single_speed.setName(new_comp_name) end return cop end |
#coil_cooling_dx_two_speed_apply_efficiency_and_curves(coil_cooling_dx_two_speed, sql_db_vars_map) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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# File 'lib/openstudio-standards/standards/Standards.CoilCoolingDXTwoSpeed.rb', line 103 def coil_cooling_dx_two_speed_apply_efficiency_and_curves(coil_cooling_dx_two_speed, sql_db_vars_map) successfully_set_all_properties = true # Get the search criteria search_criteria = coil_dx_find_search_criteria(coil_cooling_dx_two_speed) # Get the capacity capacity_w = coil_cooling_dx_two_speed_find_capacity(coil_cooling_dx_two_speed) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Lookup efficiencies depending on whether it is a unitary AC or a heat pump ac_props = nil ac_props = if coil_dx_heat_pump?(coil_cooling_dx_two_speed) model_find_object(standards_data['heat_pumps'], search_criteria, capacity_btu_per_hr, Date.today) else model_find_object(standards_data['unitary_acs'], search_criteria, capacity_btu_per_hr, Date.today) end # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXTwoSpeed', "For #{coil_cooling_dx_two_speed.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency standard.") successfully_set_all_properties = false return sql_db_vars_map end # Make the total COOL-CAP-FT curve tot_cool_cap_ft = model_add_curve(coil_cooling_dx_two_speed.model, ac_props['cool_cap_ft']) if tot_cool_cap_ft coil_cooling_dx_two_speed.setTotalCoolingCapacityFunctionOfTemperatureCurve(tot_cool_cap_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXTwoSpeed', "For #{coil_cooling_dx_two_speed.name}, cannot find cool_cap_ft curve, will not be set.") successfully_set_all_properties = false end # Make the total COOL-CAP-FFLOW curve tot_cool_cap_fflow = model_add_curve(coil_cooling_dx_two_speed.model, ac_props['cool_cap_fflow']) if tot_cool_cap_fflow coil_cooling_dx_two_speed.setTotalCoolingCapacityFunctionOfFlowFractionCurve(tot_cool_cap_fflow) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXTwoSpeed', "For #{coil_cooling_dx_two_speed.name}, cannot find cool_cap_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FT curve cool_eir_ft = model_add_curve(coil_cooling_dx_two_speed.model, ac_props['cool_eir_ft']) if cool_eir_ft coil_cooling_dx_two_speed.setEnergyInputRatioFunctionOfTemperatureCurve(cool_eir_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXTwoSpeed', "For #{coil_cooling_dx_two_speed.name}, cannot find cool_eir_ft curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FFLOW curve cool_eir_fflow = model_add_curve(coil_cooling_dx_two_speed.model, ac_props['cool_eir_fflow']) if cool_eir_fflow coil_cooling_dx_two_speed.setEnergyInputRatioFunctionOfFlowFractionCurve(cool_eir_fflow) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXTwoSpeed', "For #{coil_cooling_dx_two_speed.name}, cannot find cool_eir_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-PLF-FPLR curve cool_plf_fplr = model_add_curve(coil_cooling_dx_two_speed.model, ac_props['cool_plf_fplr']) if cool_plf_fplr coil_cooling_dx_two_speed.setPartLoadFractionCorrelationCurve(cool_plf_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXTwoSpeed', "For #{coil_cooling_dx_two_speed.name}, cannot find cool_plf_fplr curve, will not be set.") successfully_set_all_properties = false end # Make the low speed COOL-CAP-FT curve low_speed_cool_cap_ft = model_add_curve(coil_cooling_dx_two_speed.model, ac_props['cool_cap_ft']) if low_speed_cool_cap_ft coil_cooling_dx_two_speed.setLowSpeedTotalCoolingCapacityFunctionOfTemperatureCurve(low_speed_cool_cap_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXTwoSpeed', "For #{coil_cooling_dx_two_speed.name}, cannot find cool_cap_ft curve, will not be set.") successfully_set_all_properties = false end # Make the low speed COOL-EIR-FT curve low_speed_cool_eir_ft = model_add_curve(coil_cooling_dx_two_speed.model, ac_props['cool_eir_ft']) if low_speed_cool_eir_ft coil_cooling_dx_two_speed.setLowSpeedEnergyInputRatioFunctionOfTemperatureCurve(low_speed_cool_eir_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXTwoSpeed', "For #{coil_cooling_dx_two_speed.name}, cannot find cool_eir_ft curve, will not be set.") successfully_set_all_properties = false end # Preserve the original name orig_name = coil_cooling_dx_two_speed.name.to_s # Find the minimum COP and rename with efficiency rating cop = coil_cooling_dx_two_speed_standard_minimum_cop(coil_cooling_dx_two_speed, true) # Map the original name to the new name sql_db_vars_map[coil_cooling_dx_two_speed.name.to_s] = orig_name # Set the efficiency values unless cop.nil? coil_cooling_dx_two_speed.setRatedHighSpeedCOP(cop) coil_cooling_dx_two_speed.setRatedLowSpeedCOP(cop) end return sql_db_vars_map end |
#coil_cooling_dx_two_speed_find_capacity(coil_cooling_dx_two_speed) ⇒ Double
Finds capacity in W
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# File 'lib/openstudio-standards/standards/Standards.CoilCoolingDXTwoSpeed.rb', line 10 def coil_cooling_dx_two_speed_find_capacity(coil_cooling_dx_two_speed) capacity_w = nil if coil_cooling_dx_two_speed.ratedHighSpeedTotalCoolingCapacity.is_initialized capacity_w = coil_cooling_dx_two_speed.ratedHighSpeedTotalCoolingCapacity.get elsif coil_cooling_dx_two_speed.autosizedRatedHighSpeedTotalCoolingCapacity.is_initialized capacity_w = coil_cooling_dx_two_speed.autosizedRatedHighSpeedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_two_speed.name} capacity is not available, cannot apply efficiency standard.") return 0.0 end return capacity_w end |
#coil_cooling_dx_two_speed_standard_minimum_cop(coil_cooling_dx_two_speed, rename = false) ⇒ Double
Finds lookup object in standards and return efficiency
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# File 'lib/openstudio-standards/standards/Standards.CoilCoolingDXTwoSpeed.rb', line 27 def coil_cooling_dx_two_speed_standard_minimum_cop(coil_cooling_dx_two_speed, rename = false) search_criteria = coil_dx_find_search_criteria(coil_cooling_dx_two_speed) cooling_type = search_criteria['cooling_type'] heating_type = search_criteria['heating_type'] sub_category = search_criteria['subcategory'] capacity_w = coil_cooling_dx_two_speed_find_capacity(coil_cooling_dx_two_speed) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Lookup efficiencies depending on whether it is a unitary AC or a heat pump ac_props = nil ac_props = if coil_dx_heat_pump?(coil_cooling_dx_two_speed) model_find_object(standards_data['heat_pumps'], search_criteria, capacity_btu_per_hr, Date.today) else model_find_object(standards_data['unitary_acs'], search_criteria, capacity_btu_per_hr, Date.today) end # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXTwoSpeed', "For #{coil_cooling_dx_two_speed.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end # Get the minimum efficiency standards cop = nil # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXTwoSpeed', "For #{coil_cooling_dx_two_speed.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency standard.") return cop # value of nil end # If specified as SEER unless ac_props['minimum_seasonal_energy_efficiency_ratio'].nil? min_seer = ac_props['minimum_seasonal_energy_efficiency_ratio'] cop = seer_to_cop_cooling_no_fan(min_seer) new_comp_name = "#{coil_cooling_dx_two_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_two_speed.name}: #{cooling_type} #{heating_type} #{sub_category} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER unless ac_props['minimum_energy_efficiency_ratio'].nil? min_eer = ac_props['minimum_energy_efficiency_ratio'] cop = eer_to_cop(min_eer, OpenStudio.convert(capacity_kbtu_per_hr, 'kBtu/hr', 'W').get) new_comp_name = "#{coil_cooling_dx_two_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_two_speed.name}: #{cooling_type} #{heating_type} #{sub_category} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # if specified as SEER (heat pump) unless ac_props['minimum_seasonal_efficiency'].nil? min_seer = ac_props['minimum_seasonal_efficiency'] cop = seer_to_cop_cooling_no_fan(min_seer) new_comp_name = "#{coil_cooling_dx_two_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_two_speed.name}: #{cooling_type} #{heating_type} #{sub_category} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER (heat pump) unless ac_props['minimum_full_load_efficiency'].nil? min_eer = ac_props['minimum_full_load_efficiency'] cop = eer_to_cop(min_eer, OpenStudio.convert(capacity_kbtu_per_hr, 'kBtu/hr', 'W').get) new_comp_name = "#{coil_cooling_dx_two_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_two_speed.name}: #{cooling_type} #{heating_type} #{sub_category} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # Rename if rename coil_cooling_dx_two_speed.setName(new_comp_name) end return cop end |
#coil_heating_dx_multi_speed_apply_efficiency_and_curves(coil_heating_dx_multi_speed, sql_db_vars_map) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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# File 'lib/openstudio-standards/standards/Standards.CoilHeatingDXMultiSpeed.rb', line 7 def coil_heating_dx_multi_speed_apply_efficiency_and_curves(coil_heating_dx_multi_speed, sql_db_vars_map) successfully_set_all_properties = true # Define the criteria to find the unitary properties # in the hvac standards data set. search_criteria = {} search_criteria['template'] = template # Determine supplemental heating type if unitary heat_pump = false suppl_heating_type = nil if coil_heating_dx_multi_speed.airLoopHVAC.empty? if coil_heating_dx_multi_speed.containingHVACComponent.is_initialized containing_comp = coil_heating_dx_multi_speed.containingHVACComponent.get if containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.is_initialized heat_pump = true htg_coil = containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.get.supplementalHeatingCoil suppl_heating_type = if htg_coil.to_CoilHeatingElectric.is_initialized 'Electric Resistance or None' else 'All Other' end end # TODO: Add other unitary systems end end # TODO: Standards - add split system vs single package to model # For now, assume single package subcategory = 'Single Package' search_criteria['subcategory'] = subcategory # Get the coil capacity clg_capacity = nil if heat_pump == true containing_comp = coil_heating_dx_multi_speed.containingHVACComponent.get heat_pump_comp = containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.get ccoil = heat_pump_comp.coolingCoil dxcoil = ccoil.to_CoilCoolingDXMultiSpeed.get dxcoil_name = dxcoil.name.to_s if sql_db_vars_map if sql_db_vars_map[dxcoil_name] dxcoil.setName(sql_db_vars_map[dxcoil_name]) end end clg_stages = dxcoil.stages if clg_stages.last.grossRatedTotalCoolingCapacity.is_initialized clg_capacity = clg_stages.last.grossRatedTotalCoolingCapacity.get elsif dxcoil.autosizedSpeed4GrossRatedTotalCoolingCapacity.is_initialized clg_capacity = dxcoil.autosizedSpeed4GrossRatedTotalCoolingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXMultiSpeed', "For #{coil_heating_dx_multi_speed.name} capacity is not available, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end dxcoil.setName(dxcoil_name) end # Convert capacity to Btu/hr capacity_btu_per_hr = OpenStudio.convert(clg_capacity, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(clg_capacity, 'W', 'kBtu/hr').get # Lookup efficiencies depending on whether it is a unitary AC or a heat pump hp_props = model_find_object(standards_data['heat_pumps'], search_criteria, capacity_btu_per_hr, Date.today) # Check to make sure properties were found if hp_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXMultipeed', "For #{coil_heating_dx_multi_speed.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end # Make the HEAT-CAP-FT curve htg_stages = stages heat_cap_ft = model_add_curve(model, hp_props['heat_cap_ft'], standards) if heat_cap_ft htg_stages.each do |istage| istage.setHeatingCapacityFunctionofTemperatureCurve(heat_cap_ft) end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXMultiSpeed', "For #{coil_heating_dx_multi_speed.name}, cannot find heat_cap_ft curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-CAP-FFLOW curve heat_cap_fflow = model_add_curve(model, hp_props['heat_cap_fflow'], standards) if heat_cap_fflow htg_stages.each do |istage| istage.setHeatingCapacityFunctionofFlowFractionCurve(heat_cap_fflow) end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXMultiSpeed', "For #{coil_heating_dx_multi_speed.name}, cannot find heat_cap_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FT curve heat_eir_ft = model_add_curve(model, hp_props['heat_eir_ft'], standards) if heat_eir_ft htg_stages.each do |istage| istage.setEnergyInputRatioFunctionofTemperatureCurve(heat_eir_ft) end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXMultiSpeed', "For #{coil_heating_dx_multi_speed.name}, cannot find heat_eir_ft curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FFLOW curve heat_eir_fflow = model_add_curve(model, hp_props['heat_eir_fflow'], standards) if heat_eir_fflow htg_stages.each do |istage| istage.setEnergyInputRatioFunctionofFlowFractionCurve(heat_eir_fflow) end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXMultiSpeed', "For #{coil_heating_dx_multi_speed.name}, cannot find heat_eir_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-PLF-FPLR curve heat_plf_fplr = model_add_curve(model, hp_props['heat_plf_fplr'], standards) if heat_plf_fplr htg_stages.each do |istage| istage.setPartLoadFractionCorrelationCurve(heat_plf_fplr) end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXMultiSpeed', "For #{coil_heating_dx_multi_speed.name}, cannot find heat_plf_fplr curve, will not be set.") successfully_set_all_properties = false end htg_capacity = nil flow_rate4 = nil htg_stages = coil_heating_dx_multi_speed.stages if htg_stages.last.grossRatedHeatingCapacity.is_initialized htg_capacity = htg_stages.last.grossRatedHeatingCapacity.get elsif coil_heating_dx_multi_speed.autosizedSpeed4GrossRatedHeatingCapacity.is_initialized htg_capacity = coil_heating_dx_multi_speed.autosizedSpeed4GrossRatedHeatingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXMultiSpeed', "For #{coil_heating_dx_multi_speed.name} capacity is not available, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end if htg_stages.last.ratedAirFlowRate.is_initialized flow_rate4 = htg_stages.last.ratedAirFlowRate.get elsif coil_heating_dx_multi_speed.autosizedSpeed4RatedAirFlowRate.is_initialized flow_rate4 = coil_heating_dx_multi_speed.autosizedSpeed4RatedAirFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXMultiSpeed', "For #{coil_heating_dx_multi_speed.name} capacity is not available, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end # Convert capacity to Btu/hr capacity_btu_per_hr = OpenStudio.convert(htg_capacity, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(htg_capacity, 'W', 'kBtu/hr').get # Get the minimum efficiency standards cop = nil # If specified as SEER unless hp_props['minimum_seasonal_energy_efficiency_ratio'].nil? min_seer = hp_props['minimum_seasonal_energy_efficiency_ratio'] cop = seer_to_cop(min_seer) coil_heating_dx_multi_speed.setName("#{coil_heating_dx_multi_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER") OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXMultiSpeed', "For #{template}: #{coil_heating_dx_multi_speed.name}: #{suppl_heating_type} #{subcategory} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER unless hp_props['minimum_energy_efficiency_ratio'].nil? min_eer = hp_props['minimum_energy_efficiency_ratio'] cop = eer_to_cop(min_eer) coil_heating_dx_multi_speed.setName("#{coil_heating_dx_multi_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER") OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXMultiSpeed', "For #{template}: #{coil_heating_dx_multi_speed.name}: #{suppl_heating_type} #{subcategory} Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # Set the efficiency values unless cop.nil? htg_stages.each do |istage| istage.setGrossRatedHeatingCOP(cop) end end end |
#coil_heating_dx_single_speed_apply_efficiency_and_curves(coil_heating_dx_single_speed, sql_db_vars_map) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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# File 'lib/openstudio-standards/standards/Standards.CoilHeatingDXSingleSpeed.rb', line 177 def coil_heating_dx_single_speed_apply_efficiency_and_curves(coil_heating_dx_single_speed, sql_db_vars_map) successfully_set_all_properties = true # Get the search criteria search_criteria = coil_dx_find_search_criteria(coil_heating_dx_single_speed) # Get the capacity capacity_w = coil_heating_dx_single_speed_find_capacity(coil_heating_dx_single_speed) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Lookup efficiencies ac_props = model_find_object(standards_data['heat_pumps_heating'], search_criteria, capacity_btu_per_hr, Date.today) # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency standard.") successfully_set_all_properties = false return sql_db_vars_map end # Make the HEAT-CAP-FT curve heat_cap_ft = model_add_curve(coil_heating_dx_single_speed.model, ac_props['heat_cap_ft']) if heat_cap_ft coil_heating_dx_single_speed.setTotalHeatingCapacityFunctionofTemperatureCurve(heat_cap_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find heat_cap_ft curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-CAP-FFLOW curve heat_cap_fflow = model_add_curve(coil_heating_dx_single_speed.model, ac_props['heat_cap_fflow']) if heat_cap_fflow coil_heating_dx_single_speed.setTotalHeatingCapacityFunctionofFlowFractionCurve(heat_cap_fflow) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find heat_cap_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FT curve heat_eir_ft = model_add_curve(coil_heating_dx_single_speed.model, ac_props['heat_eir_ft']) if heat_eir_ft coil_heating_dx_single_speed.setEnergyInputRatioFunctionofTemperatureCurve(heat_eir_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find heat_eir_ft curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FFLOW curve heat_eir_fflow = model_add_curve(coil_heating_dx_single_speed.model, ac_props['heat_eir_fflow']) if heat_eir_fflow coil_heating_dx_single_speed.setEnergyInputRatioFunctionofFlowFractionCurve(heat_eir_fflow) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find heat_eir_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-PLF-FPLR curve heat_plf_fplr = model_add_curve(coil_heating_dx_single_speed.model, ac_props['heat_plf_fplr']) if heat_plf_fplr coil_heating_dx_single_speed.setPartLoadFractionCorrelationCurve(heat_plf_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find heat_plf_fplr curve, will not be set.") successfully_set_all_properties = false end # Preserve the original name orig_name = coil_heating_dx_single_speed.name.to_s # Find the minimum COP and rename with efficiency rating cop = coil_heating_dx_single_speed_standard_minimum_cop(coil_heating_dx_single_speed, true) # Map the original name to the new name sql_db_vars_map[coil_heating_dx_single_speed.name.to_s] = orig_name # Set the efficiency values unless cop.nil? coil_heating_dx_single_speed.setRatedCOP(cop) end return sql_db_vars_map end |
#coil_heating_dx_single_speed_find_capacity(coil_heating_dx_single_speed) ⇒ Double
Finds capacity in W. This is the cooling capacity of the paired DX cooling coil.
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# File 'lib/openstudio-standards/standards/Standards.CoilHeatingDXSingleSpeed.rb', line 10 def coil_heating_dx_single_speed_find_capacity(coil_heating_dx_single_speed) capacity_w = nil # Get the paired cooling coil clg_coil = nil # Unitary and zone equipment if coil_heating_dx_single_speed.airLoopHVAC.empty? if coil_heating_dx_single_speed.containingHVACComponent.is_initialized containing_comp = coil_heating_dx_single_speed.containingHVACComponent.get if containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAir.is_initialized clg_coil = containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAir.get.coolingCoil elsif containing_comp.to_AirLoopHVACUnitarySystem.is_initialized unitary = containing_comp.to_AirLoopHVACUnitarySystem.get if unitary.coolingCoil.is_initialized clg_coil = unitary.coolingCoil.get end end # TODO: Add other unitary systems elsif coil_heating_dx_single_speed.containingZoneHVACComponent.is_initialized containing_comp = coil_heating_dx_single_speed.containingZoneHVACComponent.get # PTHP if containing_comp.to_ZoneHVACPackagedTerminalHeatPump.is_initialized pthp = containing_comp.to_ZoneHVACPackagedTerminalHeatPump.get clg_coil = containing_comp.to_ZoneHVACPackagedTerminalHeatPump.get.coolingCoil end end end # On AirLoop directly if coil_heating_dx_single_speed.airLoopHVAC.is_initialized air_loop = coil_heating_dx_single_speed.airLoopHVAC.get # Check for the presence of any other type of cooling coil clg_types = ['OS:Coil:Cooling:DX:SingleSpeed', 'OS:Coil:Cooling:DX:TwoSpeed', 'OS:Coil:Cooling:DX:MultiSpeed'] clg_types.each do |ct| coils = air_loop.supplyComponents(ct.to_IddObjectType) next if coils.empty? clg_coil = coils[0] break # Stop on first DX cooling coil found end end # If no paired cooling coil was found, # throw an error and fall back to the heating capacity # of the DX heating coil if clg_coil.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, the paired DX cooling coil could not be found to determine capacity. Efficiency will incorrectly be based on DX coil's heating capacity.") if coil_heating_dx_single_speed.ratedTotalHeatingCapacity.is_initialized capacity_w = coil_heating_dx_single_speed.ratedTotalHeatingCapacity.get elsif coil_heating_dx_single_speed.autosizedRatedTotalHeatingCapacity.is_initialized capacity_w = coil_heating_dx_single_speed.autosizedRatedTotalHeatingCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name} capacity is not available, cannot apply efficiency standard to paired DX heating coil.") return 0.0 end return capacity_w end # If a coil was found, cast to the correct type if clg_coil.to_CoilCoolingDXSingleSpeed.is_initialized clg_coil = clg_coil.to_CoilCoolingDXSingleSpeed.get capacity_w = coil_cooling_dx_single_speed_find_capacity(clg_coil) elsif clg_coil.to_CoilCoolingDXTwoSpeed.is_initialized clg_coil = clg_coil.to_CoilCoolingDXTwoSpeed.get capacity_w = coil_cooling_dx_two_speed_find_capacity(clg_coil) elsif clg_coil.to_CoilCoolingDXMultiSpeed.is_initialized clg_coil = clg_coil.to_CoilCoolingDXMultiSpeed.get capacity_w = coil_cooling_dx_multi_speed_find_capacity(clg_coil) end # If it's a PTAC or PTHP System, we need to divide the capacity by the potential zone multiplier # because the COP is dependent on capacity, and the capacity should be the capacity of a single zone, not all the zones if ['PTAC', 'PTHP'].include?(coil_dx_subcategory(coil_heating_dx_single_speed)) mult = 1 comp = coil_heating_dx_single_speed.containingZoneHVACComponent if comp.is_initialized if comp.get.thermalZone.is_initialized mult = comp.get.thermalZone.get.multiplier if mult > 1 total_cap = capacity_w capacity_w /= mult OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, total capacity of #{OpenStudio.convert(total_cap, 'W', 'kBtu/hr').get.round(2)}kBTU/hr was divided by the zone multiplier of #{mult} to give #{capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get.round(2)}kBTU/hr.") end end end end return capacity_w end |
#coil_heating_dx_single_speed_standard_minimum_cop(coil_heating_dx_single_speed, rename = false) ⇒ Double
Finds lookup object in standards and return efficiency
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# File 'lib/openstudio-standards/standards/Standards.CoilHeatingDXSingleSpeed.rb', line 104 def coil_heating_dx_single_speed_standard_minimum_cop(coil_heating_dx_single_speed, rename = false) # find ac properties search_criteria = coil_dx_find_search_criteria(coil_heating_dx_single_speed) sub_category = search_criteria['subcategory'] suppl_heating_type = search_criteria['heating_type'] capacity_w = coil_heating_dx_single_speed_find_capacity(coil_heating_dx_single_speed) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Get the minimum efficiency standards cop = nil # find object ac_props = model_find_object(standards_data['heat_pumps_heating'], search_criteria, capacity_btu_per_hr, Date.today) # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency standard.") return cop # value of nil end # If PTHP, use equations if sub_category == 'PTHP' pthp_cop_coeff_1 = ac_props['pthp_cop_coefficient_1'] pthp_cop_coeff_2 = ac_props['pthp_cop_coefficient_2'] # TABLE 6.8.1D # COP = pthp_cop_coeff_1 - (pthp_cop_coeff_2 * Cap / 1000) # Note c: Cap means the rated cooling capacity of the product in Btu/h. # If the unit's capacity is less than 7000 Btu/h, use 7000 Btu/h in the calculation. # If the unit's capacity is greater than 15,000 Btu/h, use 15,000 Btu/h in the calculation. capacity_btu_per_hr = 7000 if capacity_btu_per_hr < 7000 capacity_btu_per_hr = 15_000 if capacity_btu_per_hr > 15_000 min_coph = pthp_cop_coeff_1 - (pthp_cop_coeff_2 * capacity_btu_per_hr / 1000.0) cop = cop_heating_to_cop_heating_no_fan(min_coph, OpenStudio.convert(capacity_kbtu_per_hr, 'kBtu/hr', 'W').get) new_comp_name = "#{coil_heating_dx_single_speed.name} #{capacity_kbtu_per_hr.round} Clg kBtu/hr #{min_coph.round(1)}COPH" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}: #{sub_category} Cooling Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; COPH = #{min_coph.round(2)}") end # If specified as HSPF unless ac_props['minimum_heating_seasonal_performance_factor'].nil? min_hspf = ac_props['minimum_heating_seasonal_performance_factor'] cop = hspf_to_cop_heating_no_fan(min_hspf) new_comp_name = "#{coil_heating_dx_single_speed.name} #{capacity_kbtu_per_hr.round} Clg kBtu/hr #{min_hspf.round(1)}HSPF" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{template}: #{coil_heating_dx_single_speed.name}: #{suppl_heating_type} #{sub_category} Cooling Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; HSPF = #{min_hspf}") end # If specified as COPH unless ac_props['minimum_coefficient_of_performance_heating'].nil? min_coph = ac_props['minimum_coefficient_of_performance_heating'] cop = cop_heating_to_cop_heating_no_fan(min_coph, OpenStudio.convert(capacity_kbtu_per_hr, 'kBtu/hr', 'W').get) new_comp_name = "#{coil_heating_dx_single_speed.name} #{capacity_kbtu_per_hr.round} Clg kBtu/hr #{min_coph.round(1)}COPH" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{template}: #{coil_heating_dx_single_speed.name}: #{suppl_heating_type} #{sub_category} Cooling Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; COPH = #{min_coph}") end # If specified as EER unless ac_props['minimum_energy_efficiency_ratio'].nil? min_eer = ac_props['minimum_energy_efficiency_ratio'] cop = eer_to_cop(min_eer, OpenStudio.convert(capacity_kbtu_per_hr, 'kBtu/hr', 'W').get) new_comp_name = "#{coil_heating_dx_single_speed.name} #{capacity_kbtu_per_hr.round} Clg kBtu/hr #{min_eer.round(1)}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{template}: #{coil_heating_dx_single_speed.name}: #{suppl_heating_type} #{sub_category} Cooling Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # Rename if rename coil_heating_dx_single_speed.setName(new_comp_name) end return cop end |
#coil_heating_gas_apply_prototype_efficiency(coil_heating_gas) ⇒ Object
Updates the efficiency of some gas heating coils per the prototype assumptions. Defaults to making no changes.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.CoilHeatingGas.rb', line 7 def coil_heating_gas_apply_prototype_efficiency(coil_heating_gas) # Do nothing return true end |
#coil_heating_gas_multi_stage_apply_efficiency_and_curves(coil_heating_gas_multi_stage, standards) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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# File 'lib/openstudio-standards/standards/Standards.CoilHeatingGasMultiStage.rb', line 8 def coil_heating_gas_multi_stage_apply_efficiency_and_curves(coil_heating_gas_multi_stage, standards) successfully_set_all_properties = true # Get the coil capacity capacity_w = nil htg_stages = stages if htg_stages.last.nominalCapacity.is_initialized capacity_w = htg_stages.last.nominalCapacity.get elsif coil_heating_gas_multi_stage.autosizedStage4NominalCapacity.is_initialized capacity_w = coil_heating_gas_multi_stage.autosizedStage4NominalCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXMultiSpeed', "For #{coil_heating_gas_multi_stage.name} capacity is not available, cannot apply efficiency standard.") successfully_set_all_properties = false return successfully_set_all_properties end # plf vs plr curve for furnace furnace_plffplr_curve = model_add_curve(model, furnace_plffplr_curve_name, standards) if furnace_plffplr_curve coil_heating_gas_multi_stage.setPartLoadFractionCorrelationCurve(furnace_plffplr_curve) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingGasMultiStage', "For #{coil_heating_gas_multi_stage.name}, cannot find plffplr curve, will not be set.") successfully_set_all_properties = false end end |
#combustion_eff_to_thermal_eff(combustion_eff) ⇒ Double
A helper method to convert from combustion efficiency to thermal efficiency
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 277 def combustion_eff_to_thermal_eff(combustion_eff) return combustion_eff - 0.007 end |
#construction_calculated_solar_heat_gain_coefficient(construction) ⇒ Double
Get the SHGC as calculated by EnergyPlus. Only applies to fenestration constructions.
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# File 'lib/openstudio-standards/standards/Standards.Construction.rb', line 288 def construction_calculated_solar_heat_gain_coefficient(construction) construction_name = construction.name.get.to_s shgc = nil sql = construction.model.sqlFile if sql.is_initialized sql = sql.get row_query = "SELECT RowName FROM tabulardatawithstrings WHERE ReportName='EnvelopeSummary' AND ReportForString='Entire Facility' AND TableName='Exterior Fenestration' AND Value='#{construction_name.upcase}'" row_id = sql.execAndReturnFirstString(row_query) if row_id.is_initialized row_id = row_id.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Construction', "SHGC row ID not found for construction: #{construction_name}.") row_id = 9999 end shgc_query = "SELECT Value FROM tabulardatawithstrings WHERE ReportName='EnvelopeSummary' AND ReportForString='Entire Facility' AND TableName='Exterior Fenestration' AND ColumnName='Glass SHGC' AND RowName='#{row_id}'" shgc = sql.execAndReturnFirstDouble(shgc_query) shgc = if shgc.is_initialized shgc.get end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Construction', 'Model has no sql file containing results, cannot lookup data.') end return shgc end |
#construction_calculated_u_factor(construction) ⇒ Double
Get the U-Factor as calculated by EnergyPlus. Only applies to fenestration constructions.
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# File 'lib/openstudio-standards/standards/Standards.Construction.rb', line 388 def construction_calculated_u_factor(construction) construction_name = construction.name.get.to_s u_factor_w_per_m2_k = nil sql = construction.model.sqlFile if sql.is_initialized sql = sql.get row_query = "SELECT RowName FROM tabulardatawithstrings WHERE ReportName='EnvelopeSummary' AND ReportForString='Entire Facility' AND TableName='Exterior Fenestration' AND Value='#{construction_name.upcase}'" row_id = sql.execAndReturnFirstString(row_query) if row_id.is_initialized row_id = row_id.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Construction', "U-Factor row ID not found for construction: #{construction_name}.") row_id = 9999 end u_factor_query = "SELECT Value FROM tabulardatawithstrings WHERE ReportName='EnvelopeSummary' AND ReportForString='Entire Facility' AND TableName='Exterior Fenestration' AND ColumnName='Glass U-Factor' AND RowName='#{row_id}'" u_factor_w_per_m2_k = sql.execAndReturnFirstDouble(u_factor_query) u_factor_w_per_m2_k = if u_factor_w_per_m2_k.is_initialized u_factor_w_per_m2_k.get end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Construction', 'Model has no sql file containing results, cannot lookup data.') end return u_factor_w_per_m2_k end |
#construction_calculated_visible_transmittance(construction) ⇒ Double
Get the VT as calculated by EnergyPlus. Only applies to fenestration constructions.
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# File 'lib/openstudio-standards/standards/Standards.Construction.rb', line 338 def construction_calculated_visible_transmittance(construction) construction_name = construction.name.get.to_s vt = nil sql = construction.model.sqlFile if sql.is_initialized sql = sql.get row_query = "SELECT RowName FROM tabulardatawithstrings WHERE ReportName='EnvelopeSummary' AND ReportForString='Entire Facility' AND TableName='Exterior Fenestration' AND Value='#{construction_name.upcase}'" row_id = sql.execAndReturnFirstString(row_query) if row_id.is_initialized row_id = row_id.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', "VT row ID not found for construction: #{construction_name}.") row_id = 9999 end vt_query = "SELECT Value FROM tabulardatawithstrings WHERE ReportName='EnvelopeSummary' AND ReportForString='Entire Facility' AND TableName='Exterior Fenestration' AND ColumnName='Glass Visible Transmittance' AND RowName='#{row_id}'" vt = sql.execAndReturnFirstDouble(vt_query) vt = if vt.is_initialized vt.get end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Space', 'Model has no sql file containing results, cannot lookup data.') end return vt end |
#construction_set_glazing_shgc(construction, target_shgc) ⇒ Bool
Sets the U-value of a construction to a specified value by modifying the thickness of the insulation layer.
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# File 'lib/openstudio-standards/standards/Standards.Construction.rb', line 203 def construction_set_glazing_shgc(construction, target_shgc) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "Setting SHGC for #{construction.name}.") # Skip layer-by-layer fenestration constructions unless construction_simple_glazing?(construction) OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ConstructionBase', "Can only set the SHGC of simple glazing. #{construction.name} is not simple glazing.") return false end # Set the SHGC glass_layer = construction.layers.first.to_SimpleGlazing.get glass_layer.setSolarHeatGainCoefficient(target_shgc) glass_layer.setName("#{glass_layer.name} SHGC #{target_shgc.round(2)}") # Modify the construction name construction.setName("#{construction.name} SHGC #{target_shgc.round(2)}") return true end |
#construction_set_glazing_u_value(construction, target_u_value_ip, intended_surface_type = 'ExteriorWall', target_includes_int_film_coefficients, target_includes_ext_film_coefficients) ⇒ Bool
Sets the U-value of a construction to a specified value by modifying the thickness of the insulation layer.
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# File 'lib/openstudio-standards/standards/Standards.Construction.rb', line 127 def construction_set_glazing_u_value(construction, target_u_value_ip, intended_surface_type = 'ExteriorWall', target_includes_int_film_coefficients, target_includes_ext_film_coefficients) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "Setting U-Value for #{construction.name}.") # Skip layer-by-layer fenestration constructions unless construction_simple_glazing?(construction) OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ConstructionBase', "Can only set the u-value of simple glazing. #{construction.name} is not simple glazing.") return false end glass_layer = construction.layers.first.to_SimpleGlazing.get OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---glass_layer = #{glass_layer.name} u_factor_si = #{glass_layer.uFactor.round(2)}.") # Convert the target U-value to SI target_u_value_ip = target_u_value_ip.to_f target_r_value_ip = 1.0 / target_u_value_ip target_u_value_si = OpenStudio.convert(target_u_value_ip, 'Btu/ft^2*hr*R', 'W/m^2*K').get target_r_value_si = 1.0 / target_u_value_si OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "#{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---target_u_value_ip = #{target_u_value_ip.round(3)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---target_r_value_ip = #{target_r_value_ip.round(2)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---target_u_value_si = #{target_u_value_si.round(3)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---target_r_value_si = #{target_r_value_si.round(2)} for #{construction.name}.") # Determine the R-value of the air films, if requested film_coeff_r_value_si = 0.0 film_coeff_r_value_si += film_coefficients_r_value(intended_surface_type, target_includes_int_film_coefficients, target_includes_ext_film_coefficients) film_coeff_u_value_si = 1.0 / film_coeff_r_value_si film_coeff_u_value_ip = OpenStudio.convert(film_coeff_u_value_si, 'W/m^2*K', 'Btu/ft^2*hr*R').get film_coeff_r_value_ip = 1.0 / film_coeff_u_value_ip OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---film_coeff_r_value_si = #{film_coeff_r_value_si.round(2)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---film_coeff_u_value_si = #{film_coeff_u_value_si.round(2)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---film_coeff_u_value_ip = #{film_coeff_u_value_ip.round(2)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---film_coeff_r_value_ip = #{film_coeff_r_value_ip.round(2)} for #{construction.name}.") # Determine the difference between the desired R-value # and the R-value of the and air films. # This is the desired R-value of the insulation. ins_r_value_si = target_r_value_si - film_coeff_r_value_si if ins_r_value_si <= 0.0 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ConstructionBase', "Requested U-value of #{target_u_value_ip} Btu/ft^2*hr*R for #{construction.name} is too high given the film coefficients of U-#{film_coeff_u_value_ip.round(2)} Btu/ft^2*hr*R; U-value will not be modified.") return false end ins_u_value_si = 1.0 / ins_r_value_si if ins_u_value_si > 7.0 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ConstructionBase', "Requested U-value of #{target_u_value_ip} for #{construction.name} is too high given the film coefficients of U-#{film_coeff_u_value_ip.round(2)}; setting U-value to EnergyPlus limit of 7.0 W/m^2*K (1.23 Btu/ft^2*hr*R).") ins_u_value_si = 7.0 end ins_u_value_ip = OpenStudio.convert(ins_u_value_si, 'W/m^2*K', 'Btu/ft^2*hr*R').get ins_r_value_ip = 1.0 / ins_u_value_ip # Set the U-value of the insulation layer glass_layer = construction.layers.first.to_SimpleGlazing.get glass_layer.setUFactor(ins_u_value_si) glass_layer.setName("#{glass_layer.name} U-#{ins_u_value_ip.round(2)}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---ins_r_value_ip = #{ins_r_value_ip.round(2)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---ins_u_value_ip = #{ins_u_value_ip.round(2)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---ins_u_value_si = #{ins_u_value_si.round(2)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---glass_layer = #{glass_layer.name} u_factor_si = #{glass_layer.uFactor.round(2)}.") # Modify the construction name construction.setName("#{construction.name} U-#{target_u_value_ip.round(2)}") return true end |
#construction_set_slab_f_factor(construction, target_f_factor_ip, insulation_layer_name = nil) ⇒ Bool
Set the F-Factor of a slab to a specified value. Assumes an unheated, fully insulated slab, and modifies the insulation layer according to the values from 90.1-2004 Table A6.3 Assembly F-Factors for Slab-on-Grade Floors.
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# File 'lib/openstudio-standards/standards/Standards.Construction.rb', line 249 def construction_set_slab_f_factor(construction, target_f_factor_ip, insulation_layer_name = nil) # Regression from table A6.3 unheated, fully insulated slab r_value_ip = 1.0248 * target_f_factor_ip**-2.186 u_value_ip = 1.0 / r_value_ip # Set the insulation U-value construction_set_u_value(construction, u_value_ip, insulation_layer_name, 'GroundContactFloor', true, true) # Modify the construction name construction.setName("#{construction.name} F-#{target_f_factor_ip.round(3)}") return true end |
#construction_set_u_value(construction, target_u_value_ip, insulation_layer_name = nil, intended_surface_type = 'ExteriorWall', target_includes_int_film_coefficients, target_includes_ext_film_coefficients) ⇒ Bool
Put in Phlyroy’s logic for inferring the insulation layer of a construction
Sets the U-value of a construction to a specified value by modifying the thickness of the insulation layer.
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# File 'lib/openstudio-standards/standards/Standards.Construction.rb', line 22 def construction_set_u_value(construction, target_u_value_ip, insulation_layer_name = nil, intended_surface_type = 'ExteriorWall', target_includes_int_film_coefficients, target_includes_ext_film_coefficients) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "Setting U-Value for #{construction.name}.") # Skip layer-by-layer fenestration constructions if construction.isFenestration OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ConstructionBase', "Can only set the u-value of opaque constructions or simple glazing. #{construction.name} is not opaque or simple glazing.") return false end # Make sure an insulation layer was specified if insulation_layer_name.nil? && target_u_value_ip == 0.0 # Do nothing if the construction already doesn't have an insulation layer elsif insulation_layer_name.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.ConstructionBase', "Requested U-value of #{target_u_value_ip} for #{construction.name}, but this construction has no insulation layer specified. Requested U-value will not be set.") return false end # Remove the insulation layer if the specified U-value is zero. if target_u_value_ip == 0.0 layer_index = 0 construction.layers.each do |layer| break if layer.name.get == insulation_layer_name layer_index += 1 end construction.eraseLayer(layer_index) return true end # Convert the target U-value to SI target_u_value_ip = target_u_value_ip.to_f target_r_value_ip = 1.0 / target_u_value_ip target_u_value_si = OpenStudio.convert(target_u_value_ip, 'Btu/ft^2*hr*R', 'W/m^2*K').get target_r_value_si = 1.0 / target_u_value_si OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "#{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---target_u_value_ip = #{target_u_value_ip.round(3)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---target_r_value_ip = #{target_r_value_ip.round(2)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---target_u_value_si = #{target_u_value_si.round(3)} for #{construction.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ConstructionBase', "---target_r_value_si = #{target_r_value_si.round(2)} for #{construction.name}.") # Determine the R-value of the non-insulation layers other_layer_r_value_si = 0.0 construction.layers.each do |layer| next if layer.to_OpaqueMaterial.empty? next if layer.name.get == insulation_layer_name other_layer_r_value_si += layer.to_OpaqueMaterial.get.thermalResistance end # Determine the R-value of the air films, if requested other_layer_r_value_si += film_coefficients_r_value(intended_surface_type, target_includes_int_film_coefficients, target_includes_ext_film_coefficients) # Determine the difference between the desired R-value # and the R-value of the non-insulation layers and air films. # This is the desired R-value of the insulation. ins_r_value_si = target_r_value_si - other_layer_r_value_si if ins_r_value_si <= 0.0 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ConstructionBase', "Requested U-value of #{target_u_value_ip} for #{construction.name} is too low given the other materials in the construction; insulation layer will not be modified.") return false end ins_r_value_ip = OpenStudio.convert(ins_r_value_si, 'm^2*K/W', 'ft^2*h*R/Btu').get # Set the R-value of the insulation layer construction.layers.each do |layer| next unless layer.name.get == insulation_layer_name if layer.to_StandardOpaqueMaterial.is_initialized layer = layer.to_StandardOpaqueMaterial.get layer.setThickness(ins_r_value_si * layer.getConductivity) layer.setName("#{layer.name} R-#{ins_r_value_ip.round(2)}") break # Stop looking for the insulation layer once found elsif layer.to_MasslessOpaqueMaterial.is_initialized layer = layer.to_MasslessOpaqueMaterial.get layer.setThermalResistance(ins_r_value_si) layer.setName("#{layer.name} R-#{ins_r_value_ip.round(2)}") break # Stop looking for the insulation layer once found elsif layer.to_AirGap.is_initialized layer = layer.to_AirGap.get target_thickness = ins_r_value_si * layer.thermalConductivity layer.setThickness(target_thickness) layer.setName("#{layer.name} R-#{ins_r_value_ip.round(2)}") break # Stop looking for the insulation layer once found end end # Modify the construction name construction.setName("#{construction.name} R-#{target_r_value_ip.round(2)}") return true end |
#construction_set_underground_wall_c_factor(construction, target_c_factor_ip, insulation_layer_name = nil) ⇒ Bool
Set the C-Factor of an underground wall to a specified value. Assumes continuous exterior insulation and modifies the insulation layer according to the values from 90.1-2004 Table A4.2 Assembly C-Factors for Below-Grade walls.
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# File 'lib/openstudio-standards/standards/Standards.Construction.rb', line 271 def construction_set_underground_wall_c_factor(construction, target_c_factor_ip, insulation_layer_name = nil) # Regression from table A4.2 continuous exterior insulation r_value_ip = 0.775 * target_c_factor_ip**-1.067 u_value_ip = 1.0 / r_value_ip # Set the insulation U-value construction_set_u_value(construction, u_value_ip, insulation_layer_name, 'GroundContactWall', true, true) # Modify the construction name construction.setName("#{construction.name} C-#{target_c_factor_ip.round(3)}") return true end |
#construction_simple_glazing?(construction) ⇒ Bool
Determines if the construction is a simple glazing construction, as indicated by having a single layer of type SimpleGlazing.
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# File 'lib/openstudio-standards/standards/Standards.Construction.rb', line 226 def construction_simple_glazing?(construction) # Not simple if more than 1 layer if construction.layers.length > 1 return false end # Not simple unless the layer is a SimpleGlazing material if construction.layers.first.to_SimpleGlazing.empty? return false end # If here, must be simple glazing return true end |
#controller_water_coil_set_convergence_limits(controller_water_coil) ⇒ Bool
Figure out what the reason for this is,
Sets the convergence tolerance to 0.0001 deltaC for all hot water coils.
because it seems like a workaround for an E+ bug that was probably addressed long ago.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.ControllerWaterCoil.rb', line 11 def controller_water_coil_set_convergence_limits(controller_water_coil) controller_action = controller_water_coil.action if controller_action.is_initialized if controller_action.get == 'Normal' controller_water_coil.setControllerConvergenceTolerance(0.0001) end end return true end |
#convert_curve_biquadratic(coeffs, ip_to_si = true) ⇒ Array<Double>
Convert biquadratic curves that are a function of temperature from IP (F) to SI © or vice-versa. The curve is of the form z = C1 + C2*x + C3*x^2 + C4*y + C5*y^2 + C6*x*y where C1, C2, … are the coefficients, x is the first independent variable (in F or C) y is the second independent variable (in F or C) and z is the resulting value
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 344 def convert_curve_biquadratic(coeffs, ip_to_si = true) if ip_to_si # Convert IP curves to SI curves si_coeffs = [] si_coeffs << coeffs[0] + 32.0 * (coeffs[1] + coeffs[3]) + 1024.0 * (coeffs[2] + coeffs[4] + coeffs[5]) si_coeffs << 9.0 / 5.0 * coeffs[1] + 576.0 / 5.0 * coeffs[2] + 288.0 / 5.0 * coeffs[5] si_coeffs << 81.0 / 25.0 * coeffs[2] si_coeffs << 9.0 / 5.0 * coeffs[3] + 576.0 / 5.0 * coeffs[4] + 288.0 / 5.0 * coeffs[5] si_coeffs << 81.0 / 25.0 * coeffs[4] si_coeffs << 81.0 / 25.0 * coeffs[5] return si_coeffs else # Convert SI curves to IP curves ip_coeffs = [] ip_coeffs << coeffs[0] - 160.0 / 9.0 * (coeffs[1] + coeffs[3]) + 25_600.0 / 81.0 * (coeffs[2] + coeffs[4] + coeffs[5]) ip_coeffs << 5.0 / 9.0 * (coeffs[1] - 320.0 / 9.0 * coeffs[2] - 160.0 / 9.0 * coeffs[5]) ip_coeffs << 25.0 / 81.0 * coeffs[2] ip_coeffs << 5.0 / 9.0 * (coeffs[3] - 320.0 / 9.0 * coeffs[4] - 160.0 / 9.0 * coeffs[5]) ip_coeffs << 25.0 / 81.0 * coeffs[4] ip_coeffs << 25.0 / 81.0 * coeffs[5] return ip_coeffs end end |
#cooling_tower_single_speed_apply_efficiency_and_curves(cooling_tower_single_speed) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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# File 'lib/openstudio-standards/standards/Standards.CoolingTowerSingleSpeed.rb', line 10 def cooling_tower_single_speed_apply_efficiency_and_curves(cooling_tower_single_speed) cooling_tower_apply_minimum_power_per_flow(cooling_tower_single_speed) return true end |
#cooling_tower_two_speed_apply_efficiency_and_curves(cooling_tower_two_speed) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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# File 'lib/openstudio-standards/standards/Standards.CoolingTowerTwoSpeed.rb', line 10 def cooling_tower_two_speed_apply_efficiency_and_curves(cooling_tower_two_speed) cooling_tower_apply_minimum_power_per_flow(cooling_tower_two_speed) return true end |
#cooling_tower_variable_speed_apply_efficiency_and_curves(cooling_tower_variable_speed) ⇒ Bool
Applies the standard efficiency ratings and typical performance curves to this object.
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# File 'lib/openstudio-standards/standards/Standards.CoolingTowerVariableSpeed.rb', line 10 def cooling_tower_variable_speed_apply_efficiency_and_curves(cooling_tower_variable_speed) cooling_tower_apply_minimum_power_per_flow(cooling_tower_variable_speed) return true end |
#cop_heating_to_cop_heating_no_fan(coph47, capacity_w) ⇒ Double
Convert from COP_H to COP (no fan) for heat pump heating coils
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 144 def cop_heating_to_cop_heating_no_fan(coph47, capacity_w) # Convert the capacity to Btu/hr capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get cop = 1.48E-7 * coph47 * capacity_btu_per_hr + 1.062 * coph47 return cop end |
#cop_to_eer(cop, capacity_w = nil) ⇒ Double
Convert from COP to EER
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 215 def cop_to_eer(cop, capacity_w = nil) eer = nil if capacity_w.nil? # The PNNL Method. # r is the ratio of supply fan power to total equipment power at the rating condition, # assumed to be 0.12 for the reference buildngs per PNNL. r = 0.12 eer = 3.413 * (cop * (1 - r) - r) else # The 90.1-2013 method # Convert the capacity to Btu/hr capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get eer = cop / (7.84E-8 * capacity_btu_per_hr + 0.338) end return eer end |
#cop_to_kw_per_ton(cop) ⇒ Double
Convert from COP to kW/ton
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 242 def cop_to_kw_per_ton(cop) return 3.517 / cop end |
#cop_to_seer(cop) ⇒ Double
Convert from COP to SEER
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 169 def cop_to_seer(cop) delta = 0.3796**2 - 4.0 * 0.0076 * cop seer = (-delta**0.5 + 0.3796) / (2.0 * 0.0076) return seer end |
#create_curve_bicubic(coeffs, crv_name, min_x, max_x, min_y, max_y, min_out, max_out) ⇒ Object
Create a bicubic curve of the form z = C1 + C2*x + C3*x^2 + C4*y + C5*y^2 + C6*x*y + C7*x^3 + C8*y^3 + C9*x^2*y + C10*x*y^2
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 410 def create_curve_bicubic(coeffs, crv_name, min_x, max_x, min_y, max_y, min_out, max_out) curve = OpenStudio::Model::CurveBicubic.new(self) curve.setName(crv_name) curve.setCoefficient1Constant(coeffs[0]) curve.setCoefficient2x(coeffs[1]) curve.setCoefficient3xPOW2(coeffs[2]) curve.setCoefficient4y(coeffs[3]) curve.setCoefficient5yPOW2(coeffs[4]) curve.setCoefficient6xTIMESY(coeffs[5]) curve.setCoefficient7xPOW3(coeffs[6]) curve.setCoefficient8yPOW3(coeffs[7]) curve.setCoefficient9xPOW2TIMESY(coeffs[8]) curve.setCoefficient10xTIMESYPOW2(coeffs[9]) curve.setMinimumValueofx(min_x) unless min_x.nil? curve.setMaximumValueofx(max_x) unless max_x.nil? curve.setMinimumValueofy(min_y) unless min_y.nil? curve.setMaximumValueofy(max_y) unless max_y.nil? curve.setMinimumCurveOutput(min_out) unless min_out.nil? curve.setMaximumCurveOutput(max_out) unless max_out.nil? return curve end |
#create_curve_biquadratic(coeffs, crv_name, min_x, max_x, min_y, max_y, min_out, max_out) ⇒ Object
Create a biquadratic curve of the form z = C1 + C2*x + C3*x^2 + C4*y + C5*y^2 + C6*x*y
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 380 def create_curve_biquadratic(coeffs, crv_name, min_x, max_x, min_y, max_y, min_out, max_out) curve = OpenStudio::Model::CurveBiquadratic.new(self) curve.setName(crv_name) curve.setCoefficient1Constant(coeffs[0]) curve.setCoefficient2x(coeffs[1]) curve.setCoefficient3xPOW2(coeffs[2]) curve.setCoefficient4y(coeffs[3]) curve.setCoefficient5yPOW2(coeffs[4]) curve.setCoefficient6xTIMESY(coeffs[5]) curve.setMinimumValueofx(min_x) unless min_x.nil? curve.setMaximumValueofx(max_x) unless max_x.nil? curve.setMinimumValueofy(min_y) unless min_y.nil? curve.setMaximumValueofy(max_y) unless max_y.nil? curve.setMinimumCurveOutput(min_out) unless min_out.nil? curve.setMaximumCurveOutput(max_out) unless max_out.nil? return curve end |
#create_curve_cubic(coeffs, crv_name, min_x, max_x, min_out, max_out) ⇒ Object
Create a cubic curve of the form z = C1 + C2*x + C3*x^2 + C4*x^3
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 471 def create_curve_cubic(coeffs, crv_name, min_x, max_x, min_out, max_out) curve = OpenStudio::Model::CurveCubic.new(self) curve.setName(crv_name) curve.setCoefficient1Constant(coeffs[0]) curve.setCoefficient2x(coeffs[1]) curve.setCoefficient3xPOW2(coeffs[2]) curve.setCoefficient4xPOW3(coeffs[3]) curve.setMinimumValueofx(min_x) unless min_x.nil? curve.setMaximumValueofx(max_x) unless max_x.nil? curve.setMinimumCurveOutput(min_out) unless min_out.nil? curve.setMaximumCurveOutput(max_out) unless max_out.nil? return curve end |
#create_curve_exponent(coeffs, crv_name, min_x, max_x, min_out, max_out) ⇒ Object
Create an exponential curve of the form z = C1 + C2*x^C3
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 495 def create_curve_exponent(coeffs, crv_name, min_x, max_x, min_out, max_out) curve = OpenStudio::Model::CurveExponent.new(self) curve.setName(crv_name) curve.setCoefficient1Constant(coeffs[0]) curve.setCoefficient2Constant(coeffs[1]) curve.setCoefficient3Constant(coeffs[2]) curve.setMinimumValueofx(min_x) unless min_x.nil? curve.setMaximumValueofx(max_x) unless max_x.nil? curve.setMinimumCurveOutput(min_out) unless min_out.nil? curve.setMaximumCurveOutput(max_out) unless max_out.nil? return curve end |
#create_curve_quadratic(coeffs, crv_name, min_x, max_x, min_out, max_out, is_dimensionless = false) ⇒ Object
Create a quadratic curve of the form z = C1 + C2*x + C3*x^2
and the resulting output dependent variable is considered unitless
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 444 def create_curve_quadratic(coeffs, crv_name, min_x, max_x, min_out, max_out, is_dimensionless = false) curve = OpenStudio::Model::CurveQuadratic.new(self) curve.setName(crv_name) curve.setCoefficient1Constant(coeffs[0]) curve.setCoefficient2x(coeffs[1]) curve.setCoefficient3xPOW2(coeffs[2]) curve.setMinimumValueofx(min_x) unless min_x.nil? curve.setMaximumValueofx(max_x) unless max_x.nil? curve.setMinimumCurveOutput(min_out) unless min_out.nil? curve.setMaximumCurveOutput(max_out) unless max_out.nil? if is_dimensionless curve.setInputUnitTypeforX('Dimensionless') curve.setOutputUnitType('Dimensionless') end return curve end |
#define_space_multiplier ⇒ Object
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 4 def define_space_multiplier return @space_multiplier_map end |
#eer_to_cop(eer, capacity_w = nil) ⇒ Double
Convert from EER to COP
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 183 def eer_to_cop(eer, capacity_w = nil) cop = nil if capacity_w.nil? # The PNNL Method. # r is the ratio of supply fan power to total equipment power at the rating condition, # assumed to be 0.12 for the reference buildngs per PNNL. r = 0.12 cop = (eer / 3.413 + r) / (1 - r) else # The 90.1-2013 method # Convert the capacity to Btu/hr capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get cop = 7.84E-8 * eer * capacity_btu_per_hr + 0.338 * eer end return cop end |
#fan_constant_volume_airloop_fan_pressure_rise(fan_constant_volume) ⇒ Double
Determine the prototype fan pressure rise for a constant volume fan on an AirLoopHVAC based on the airflow of the system. to the logic from ASHRAE 90.1-2004 prototypes.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.FanConstantVolume.rb', line 60 def fan_constant_volume_airloop_fan_pressure_rise(fan_constant_volume) # Get the max flow rate from the fan. maximum_flow_rate_m3_per_s = nil if fan_constant_volume.maximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_constant_volume.maximumFlowRate.get elsif fan_constant_volume.autosizedMaximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_constant_volume.autosizedMaximumFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.prototype.FanConstantVolume', "For #{fan_constant_volume.name} max flow rate is not available, cannot apply prototype assumptions.") return false end # Convert max flow rate to cfm maximum_flow_rate_cfm = OpenStudio.convert(maximum_flow_rate_m3_per_s, 'm^3/s', 'cfm').get # Determine the pressure rise pressure_rise_in_h2o = if maximum_flow_rate_cfm < 7437 2.5 elsif maximum_flow_rate_cfm >= 7437 && maximum_flow_rate_cfm < 20_000 4.46 else # Over 20,000 cfm 4.09 end return pressure_rise_in_h2o end |
#fan_constant_volume_apply_prototype_fan_pressure_rise(fan_constant_volume) ⇒ Object
Sets the fan pressure rise based on the Prototype buildings inputs which are governed by the flow rate coming through the fan and whether the fan lives inside a unit heater, PTAC, etc.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.FanConstantVolume.rb', line 8 def fan_constant_volume_apply_prototype_fan_pressure_rise(fan_constant_volume) # Don't modify unit heater fans return true if fan_constant_volume.name.to_s.include?('UnitHeater Fan') # Get the max flow rate from the fan. maximum_flow_rate_m3_per_s = nil if fan_constant_volume.maximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_constant_volume.maximumFlowRate.get elsif fan_constant_volume.autosizedMaximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_constant_volume.autosizedMaximumFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.prototype.FanConstantVolume', "For #{fan_constant_volume.name} max flow rate is not available, cannot apply prototype assumptions.") return false end # Convert max flow rate to cfm maximum_flow_rate_cfm = OpenStudio.convert(maximum_flow_rate_m3_per_s, 'm^3/s', 'cfm').get # Pressure rise will be determined based on the # following logic. pressure_rise_in_h2o = 0.0 # If the fan lives inside of a zone hvac equipment if fan_constant_volume.containingZoneHVACComponent.is_initialized zone_hvac = fan_constant_volume.containingZoneHVACComponent.get if zone_hvac.to_ZoneHVACPackagedTerminalAirConditioner.is_initialized pressure_rise_in_h2o = 1.33 elsif zone_hvac.to_ZoneHVACFourPipeFanCoil.is_initialized pressure_rise_in_h2o = 1.33 elsif zone_hvac.to_ZoneHVACUnitHeater.is_initialized pressure_rise_in_h2o = 0.2 else # This type of fan should not exist in the prototype models return false end # If the fan lives on an airloop elsif fan_constant_volume.airLoopHVAC.is_initialized pressure_rise_in_h2o = fan_constant_volume_airloop_fan_pressure_rise(fan_constant_volume) end # Set the fan pressure rise pressure_rise_pa = OpenStudio.convert(pressure_rise_in_h2o, 'inH_{2}O', 'Pa').get fan_constant_volume.setPressureRise(pressure_rise_pa) OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.FanConstantVolume', "For Prototype: #{fan_constant_volume.name}: #{maximum_flow_rate_cfm.round}cfm; Pressure Rise = #{pressure_rise_in_h2o}in w.c.") return true end |
#fan_on_off_airloop_or_unitary_fan_pressure_rise(fan_on_off) ⇒ Double
Determine the prototype fan pressure rise for an on off fan on an AirLoopHVAC or inside a unitary system based on the airflow of the system. to the logic from ASHRAE 90.1-2004 prototypes.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.FanOnOff.rb', line 66 def fan_on_off_airloop_or_unitary_fan_pressure_rise(fan_on_off) # Get the max flow rate from the fan. maximum_flow_rate_m3_per_s = nil if fan_on_off.maximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_on_off.maximumFlowRate.get elsif fan_on_off.autosizedMaximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_on_off.autosizedMaximumFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.prototype.FanOnOff', "For #{fan_on_off.name} max flow rate is not available, cannot apply prototype assumptions.") return false end # Convert max flow rate to cfm maximum_flow_rate_cfm = OpenStudio.convert(maximum_flow_rate_m3_per_s, 'm^3/s', 'cfm').get # Determine the pressure rise pressure_rise_in_h2o = if maximum_flow_rate_cfm < 7437 2.5 elsif maximum_flow_rate_cfm >= 7437 && maximum_flow_rate_cfm < 20_000 4.46 else # Over 20,000 cfm 4.09 end return pressure_rise_in_h2o end |
#fan_on_off_apply_prototype_fan_pressure_rise(fan_on_off) ⇒ Object
Sets the fan pressure rise based on the Prototype buildings inputs which are governed by the flow rate coming through the fan and whether the fan lives inside a unit heater, PTAC, etc.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.FanOnOff.rb', line 9 def fan_on_off_apply_prototype_fan_pressure_rise(fan_on_off) # Get the max flow rate from the fan. maximum_flow_rate_m3_per_s = nil if fan_on_off.maximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_on_off.maximumFlowRate.get elsif fan_on_off.autosizedMaximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_on_off.autosizedMaximumFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.prototype.FanOnOff', "For #{fan_on_off.name} max flow rate is not available, cannot apply prototype assumptions.") return false end # Convert max flow rate to cfm maximum_flow_rate_cfm = OpenStudio.convert(maximum_flow_rate_m3_per_s, 'm^3/s', 'cfm').get # Pressure rise will be determined based on the # following logic. pressure_rise_in_h2o = 0.0 # If the fan lives inside of a zone hvac equipment if fan_on_off.containingZoneHVACComponent.is_initialized zone_hvac = fan_on_off.containingZoneHVACComponent.get if zone_hvac.to_ZoneHVACPackagedTerminalAirConditioner.is_initialized pressure_rise_in_h2o = 1.33 elsif zone_hvac.to_ZoneHVACFourPipeFanCoil.is_initialized pressure_rise_in_h2o = 1.087563267 elsif zone_hvac.to_ZoneHVACUnitHeater.is_initialized pressure_rise_in_h2o = 0.2 else # This type of fan should not exist in the prototype models return false end end # If the fan lives on an airloop if fan_on_off.airLoopHVAC.is_initialized pressure_rise_in_h2o = fan_on_off_airloop_or_unitary_fan_pressure_rise(fan_on_off) end # If the fan lives inside a unitary system if fan_on_off.airLoopHVAC.empty? && fan_on_off.containingZoneHVACComponent.empty? pressure_rise_in_h2o = fan_on_off_airloop_or_unitary_fan_pressure_rise(fan_on_off) end # Set the fan pressure rise pressure_rise_pa = OpenStudio.convert(pressure_rise_in_h2o, 'inH_{2}O', 'Pa').get fan_on_off.setPressureRise(pressure_rise_pa) OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.FanOnOff', "For Prototype: #{fan_on_off.name}: #{maximum_flow_rate_cfm.round}cfm; Pressure Rise = #{pressure_rise_in_h2o}in w.c.") return true end |
#fan_variable_volume_airloop_fan_pressure_rise(fan_variable_volume) ⇒ Double
Determine the prototype fan pressure rise for a variable volume fan on an AirLoopHVAC based on the airflow of the system. to the logic from ASHRAE 90.1-2004 prototypes.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.FanVariableVolume.rb', line 58 def fan_variable_volume_airloop_fan_pressure_rise(fan_variable_volume) # Get the max flow rate from the fan. maximum_flow_rate_m3_per_s = nil if fan_variable_volume.maximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_variable_volume.maximumFlowRate.get elsif fan_variable_volume.autosizedMaximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_variable_volume.autosizedMaximumFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.prototype.FanVariableVolume', "For #{fan_variable_volume.name} max flow rate is not available, cannot apply prototype assumptions.") return false end # Convert max flow rate to cfm maximum_flow_rate_cfm = OpenStudio.convert(maximum_flow_rate_m3_per_s, 'm^3/s', 'cfm').get # Determine the pressure rise pressure_rise_in_h2o = if maximum_flow_rate_cfm < 4648 4.0 elsif maximum_flow_rate_cfm >= 4648 && maximum_flow_rate_cfm < 20_000 6.32 else # Over 20,000 cfm 5.58 end return pressure_rise_in_h2o end |
#fan_variable_volume_apply_prototype_fan_pressure_rise(fan_variable_volume) ⇒ Object
Sets the fan pressure rise based on the Prototype buildings inputs which are governed by the flow rate coming through the fan and whether the fan lives inside a unit heater, PTAC, etc.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.FanVariableVolume.rb', line 9 def fan_variable_volume_apply_prototype_fan_pressure_rise(fan_variable_volume) # Get the max flow rate from the fan. maximum_flow_rate_m3_per_s = nil if fan_variable_volume.maximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_variable_volume.maximumFlowRate.get elsif fan_variable_volume.autosizedMaximumFlowRate.is_initialized maximum_flow_rate_m3_per_s = fan_variable_volume.autosizedMaximumFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.prototype.FanVariableVolume', "For #{fan_variable_volume.name} max flow rate is not available, cannot apply prototype assumptions.") return false end # Convert max flow rate to cfm maximum_flow_rate_cfm = OpenStudio.convert(maximum_flow_rate_m3_per_s, 'm^3/s', 'cfm').get # Pressure rise will be determined based on the # following logic. pressure_rise_in_h2o = 0.0 # If the fan lives inside of a zone hvac equipment if fan_variable_volume.containingZoneHVACComponent.is_initialized zone_hvac = fan_variable_volume.ZoneHVACComponent.get if zone_hvac.to_ZoneHVACPackagedTerminalAirConditioner.is_initialized pressure_rise_in_h2o = 1.33 elsif zone_hvac.to_ZoneHVACFourPipeFanCoil.is_initialized pressure_rise_in_h2o = 1.33 elsif zone_hvac.to_ZoneHVACUnitHeater.is_initialized pressure_rise_in_h2o = 0.2 else # This type of fan should not exist in the prototype models return false end # If the fan lives on an airloop elsif fan_variable_volume.airLoopHVAC.is_initialized pressure_rise_in_h2o = fan_variable_volume_airloop_fan_pressure_rise(fan_variable_volume) end # Set the fan pressure rise pressure_rise_pa = OpenStudio.convert(pressure_rise_in_h2o, 'inH_{2}O', 'Pa').get fan_variable_volume.setPressureRise(pressure_rise_pa) OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.FanVariableVolume', "For Prototype: #{fan_variable_volume.name}: #{maximum_flow_rate_cfm.round}cfm; Pressure Rise = #{pressure_rise_in_h2o}in w.c.") return true end |
#fan_variable_volume_cooling_system_type(fan_variable_volume) ⇒ String
Determine if the cooling system is DX, CHW, evaporative, or a mixture. dx, chw, evaporative, mixed, unknown.
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# File 'lib/openstudio-standards/standards/Standards.FanVariableVolume.rb', line 182 def fan_variable_volume_cooling_system_type(fan_variable_volume) clg_sys_type = 'unknown' # Get the air loop this fan is connected to air_loop = fan_variable_volume.airLoopHVAC unless air_loop.is_initialized return clg_sys_type end air_loop = air_loop.get # Check the types of coils on the AirLoopHVAC has_dx = false has_chw = false has_evap = false air_loop.supplyComponents.each do |sc| # CoilCoolingDXSingleSpeed if sc.to_CoilCoolingDXSingleSpeed.is_initialized has_dx = true # CoilCoolingDXTwoSpeed elsif sc.to_CoilCoolingDXTwoSpeed.is_initialized has_dx = true # CoilCoolingMultiSpeed elsif sc.to_CoilCoolingDXMultiSpeed.is_initialized has_dx = true # CoilCoolingWater elsif sc.to_CoilCoolingWater.is_initialized has_chw = true # CoilCoolingWaterToAirHeatPumpEquationFit elsif sc.to_CoilCoolingWaterToAirHeatPumpEquationFit.is_initialized has_dx = true # UnitarySystem elsif sc.to_AirLoopHVACUnitarySystem.is_initialized unitary = sc.to_AirLoopHVACUnitarySystem.get if unitary.coolingCoil.is_initialized clg_coil = unitary.coolingCoil.get # CoilCoolingDXSingleSpeed if clg_coil.to_CoilCoolingDXSingleSpeed.is_initialized has_dx = true # CoilCoolingDXTwoSpeed elsif clg_coil.to_CoilCoolingDXTwoSpeed.is_initialized has_dx = true # CoilCoolingWater elsif clg_coil.to_CoilCoolingWater.is_initialized has_chw = true # CoilCoolingWaterToAirHeatPumpEquationFit elsif clg_coil.to_CoilCoolingWaterToAirHeatPumpEquationFit.is_initialized has_dx = true end end # UnitaryHeatPumpAirToAir elsif sc.to_AirLoopHVACUnitaryHeatPumpAirToAir.is_initialized unitary = sc.to_AirLoopHVACUnitaryHeatPumpAirToAir.get clg_coil = unitary.coolingCoil # CoilCoolingDXSingleSpeed if clg_coil.to_CoilCoolingDXSingleSpeed.is_initialized has_dx = true # CoilCoolingDXTwoSpeed elsif clg_coil.to_CoilCoolingDXTwoSpeed.is_initialized has_dx = true # CoilCoolingWater elsif clg_coil.to_CoilCoolingWater.is_initialized has_chw = true end # EvaporativeCoolerDirectResearchSpecial elsif sc.to_EvaporativeCoolerDirectResearchSpecial.is_initialized has_evap = true # EvaporativeCoolerIndirectResearchSpecial elsif sc.to_EvaporativeCoolerIndirectResearchSpecial.is_initialized has_evap = true elsif sc.to_CoilCoolingCooledBeam.is_initialized || sc.to_AirLoopHVACUnitaryHeatCoolVAVChangeoverBypass.is_initialized || sc.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.is_initialized || sc.to_AirLoopHVACUnitarySystem.is_initialized OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "#{air_loop.name} has a cooling coil named #{sc.name}, whose type is not yet covered by cooling system type checks.") end end # Determine the type if (has_chw && has_dx && has_evap) || (has_chw && has_dx) || (has_chw && has_evap) || (has_dx && has_evap) clg_sys_type = 'mixed' elsif has_chw clg_sys_type = 'chw' elsif has_dx clg_sys_type = 'dx' elsif has_evap clg_sys_type = 'evap' end return clg_sys_type end |
#fan_variable_volume_part_load_fan_power_limitation?(fan_variable_volume) ⇒ Boolean
Determines whether there is a requirement to have a VSD or some other method to reduce fan power at low part load ratios.
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# File 'lib/openstudio-standards/standards/Standards.FanVariableVolume.rb', line 114 def fan_variable_volume_part_load_fan_power_limitation?(fan_variable_volume) part_load_control_required = false # Check if the fan is on a multizone or single zone system. # If not on an AirLoop (for example, in unitary system or zone equipment), assumed to be a single zone fan mz_fan = false if fan_variable_volume.airLoopHVAC.is_initialized air_loop = fan_variable_volume.airLoopHVAC.get mz_fan = air_loop_hvac_multizone_vav_system?(air_loop) end # No part load fan power control is required for single zone VAV systems unless mz_fan OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.FanVariableVolume', "For #{fan_variable_volume.name}: No part load fan power control is required for single zone VAV systems.") return part_load_control_required end # Determine the motor and capacity size limits hp_limit = fan_variable_volume_part_load_fan_power_limitation_hp_limit(fan_variable_volume) cap_limit_btu_per_hr = fan_variable_volume_part_load_fan_power_limitation_capacity_limit(fan_variable_volume) # Check against limits if hp_limit && cap_limit_btu_per_hr air_loop = fan_variable_volume.airLoopHVAC unless air_loop.is_initialized OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{fan_variable_volume.name}: Could not find the air loop to get cooling capacity for determining part load fan power control requirement.") return part_load_control_required end air_loop = air_loop.get clg_cap_w = air_loop_hvac_total_cooling_capacity(air_loop) clg_cap_btu_per_hr = OpenStudio.convert(clg_cap_w, 'W', 'Btu/hr').get fan_hp = fan_motor_horsepower(fan_variable_volume) if fan_hp >= hp_limit && clg_cap_btu_per_hr >= cap_limit_btu_per_hr OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{fan_variable_volume.name}: part load fan power control is required for #{fan_hp.round(1)} HP fan, #{clg_cap_btu_per_hr.round} Btu/hr cooling capacity.") part_load_control_required = true end elsif hp_limit fan_hp = fan_motor_horsepower(fan_variable_volume) if fan_hp >= hp_limit OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{fan_variable_volume.name}: Part load fan power control is required for #{fan_hp.round(1)} HP fan.") part_load_control_required = true end end return part_load_control_required end |
#fan_variable_volume_part_load_fan_power_limitation_capacity_limit(fan_variable_volume) ⇒ Double
The threhold capacity below which part load control is not required.
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# File 'lib/openstudio-standards/standards/Standards.FanVariableVolume.rb', line 174 def fan_variable_volume_part_load_fan_power_limitation_capacity_limit(fan_variable_volume) cap_limit_btu_per_hr = nil # No minimum limit return cap_limit_btu_per_hr end |
#fan_variable_volume_part_load_fan_power_limitation_hp_limit(fan_variable_volume) ⇒ Double
The threhold horsepower below which part load control is not required.
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# File 'lib/openstudio-standards/standards/Standards.FanVariableVolume.rb', line 165 def fan_variable_volume_part_load_fan_power_limitation_hp_limit(fan_variable_volume) hp_limit = nil # No minimum limit return hp_limit end |
#fan_variable_volume_set_control_type(fan_variable_volume, control_type) ⇒ Object
Modify the fan curve coefficients to reflect a specific type of control.
Multi Zone VAV with discharge dampers, Multi Zone VAV with VSD and SP Setpoint Reset, Multi Zone VAV with AF or BI Riding Curve, Multi Zone VAV with AF or BI with Inlet Vanes, Multi Zone VAV with FC Riding Curve, Multi Zone VAV with FC with Inlet Vanes, Multi Zone VAV with Vane-axial with Variable Pitch Blades, Multi Zone VAV with VSD and Fixed SP Setpoint, Multi Zone VAV with VSD and Static Pressure Reset, Single Zone VAV Fan
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# File 'lib/openstudio-standards/standards/Standards.FanVariableVolume.rb', line 20 def fan_variable_volume_set_control_type(fan_variable_volume, control_type) # Determine the coefficients coeff_a = nil coeff_b = nil coeff_c = nil coeff_d = nil min_pct_pwr = nil case control_type # add 'Multi Zone VAV with discharge dampers' and change the minimum fan power fraction of "Multi Zone VAV with VSD and Static Pressure Reset" when 'Multi Zone VAV with discharge dampers' coeff_a = 0.18984763 coeff_b = 0.31447014 coeff_c = 0.49568211 coeff_d = 0.0 min_pct_pwr = 0.25 when 'Multi Zone VAV with VSD and SP Setpoint Reset' coeff_a = 0.04076 coeff_b = 0.0881 coeff_c = -0.0729 coeff_d = 0.9437 min_pct_pwr = 0.25 when 'Multi Zone VAV with AF or BI Riding Curve' coeff_a = 0.1631 coeff_b = 1.5901 coeff_c = -0.8817 coeff_d = 0.1281 min_pct_pwr = 0.7 when 'Multi Zone VAV with AF or BI with Inlet Vanes' coeff_a = 0.9977 coeff_b = -0.659 coeff_c = 0.9547 coeff_d = -0.2936 min_pct_pwr = 0.5 when 'Multi Zone VAV with FC Riding Curve' coeff_a = 0.1224 coeff_b = 0.612 coeff_c = 0.5983 coeff_d = -0.3334 min_pct_pwr = 0.3 when 'Multi Zone VAV with FC with Inlet Vanes' coeff_a = 0.3038 coeff_b = -0.7608 coeff_c = 2.2729 coeff_d = -0.8169 min_pct_pwr = 0.3 when 'Multi Zone VAV with Vane-axial with Variable Pitch Blades' coeff_a = 0.1639 coeff_b = -0.4016 coeff_c = 1.9909 coeff_d = -0.7541 min_pct_pwr = 0.2 when 'Multi Zone VAV with VSD and Fixed SP Setpoint' coeff_a = 0.0013 coeff_b = 0.1470 coeff_c = 0.9506 coeff_d = -0.0998 min_pct_pwr = 0.2 when 'Multi Zone VAV with VSD and Static Pressure Reset' coeff_a = 0.04076 coeff_b = 0.0881 coeff_c = -0.0729 coeff_d = 0.9437 min_pct_pwr = 0.1 when 'Single Zone VAV Fan' coeff_a = 0.027828 coeff_b = 0.026583 coeff_c = -0.087069 coeff_d = 1.030920 min_pct_pwr = 0.1 else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.FanVariableVolume', "Fan control type '#{control_type}' not recognized, fan power coefficients will not be changed.") return false end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.FanVariableVolume', "For #{fan_variable_volume.name}: Set fan curve coefficients to reflect control type of '#{control_type}'.") # Set the coefficients fan_variable_volume.setFanPowerCoefficient1(coeff_a) fan_variable_volume.setFanPowerCoefficient2(coeff_b) fan_variable_volume.setFanPowerCoefficient3(coeff_c) fan_variable_volume.setFanPowerCoefficient4(coeff_d) # Set the fan minimum power fan_variable_volume.setFanPowerMinimumFlowRateInputMethod('Fraction') fan_variable_volume.setFanPowerMinimumFlowFraction(min_pct_pwr) # Append the control type to the fan name # self.setName("#{self.name} #{control_type}") end |
#fan_zone_exhaust_apply_prototype_fan_pressure_rise(fan_zone_exhaust) ⇒ Object
Sets the fan pressure rise based on the Prototype buildings inputs
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.FanZoneExhaust.rb', line 7 def fan_zone_exhaust_apply_prototype_fan_pressure_rise(fan_zone_exhaust) # All exhaust fans are assumed to have a pressure rise of # 0.5 in w.c. in the prototype building models. pressure_rise_in_h2o = 0.5 # Set the pressure rise pressure_rise_pa = OpenStudio.convert(pressure_rise_in_h2o, 'inH_{2}O', 'Pa').get fan_zone_exhaust.setPressureRise(pressure_rise_pa) OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.FanZoneExhaust', "For Prototype: #{fan_zone_exhaust.name}: Pressure Rise = #{pressure_rise_in_h2o}in w.c.") return true end |
#film_coefficients_r_value(intended_surface_type, int_film, ext_film) ⇒ Double
Gives the total R-value of the interior and exterior (if applicable) film coefficients for a particular type of surface.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 521 def film_coefficients_r_value(intended_surface_type, int_film, ext_film) # Return zero if both interior and exterior are false return 0.0 if !int_film && !ext_film # Film values from 90.1-2010 A9.4.1 Air Films film_ext_surf_r_ip = 0.17 film_semi_ext_surf_r_ip = 0.46 film_int_surf_ht_flow_up_r_ip = 0.61 film_int_surf_ht_flow_dwn_r_ip = 0.92 fil_int_surf_vertical_r_ip = 0.68 film_ext_surf_r_si = OpenStudio.convert(film_ext_surf_r_ip, 'ft^2*hr*R/Btu', 'm^2*K/W').get film_semi_ext_surf_r_si = OpenStudio.convert(film_semi_ext_surf_r_ip, 'ft^2*hr*R/Btu', 'm^2*K/W').get film_int_surf_ht_flow_up_r_si = OpenStudio.convert(film_int_surf_ht_flow_up_r_ip, 'ft^2*hr*R/Btu', 'm^2*K/W').get film_int_surf_ht_flow_dwn_r_si = OpenStudio.convert(film_int_surf_ht_flow_dwn_r_ip, 'ft^2*hr*R/Btu', 'm^2*K/W').get fil_int_surf_vertical_r_si = OpenStudio.convert(fil_int_surf_vertical_r_ip, 'ft^2*hr*R/Btu', 'm^2*K/W').get film_r_si = 0.0 case intended_surface_type when 'AtticFloor' film_r_si += film_int_surf_ht_flow_up_r_si if ext_film # Outside film_r_si += film_semi_ext_surf_r_si if int_film # Inside when 'AtticWall', 'AtticRoof' film_r_si += film_ext_surf_r_si if ext_film # Outside film_r_si += film_semi_ext_surf_r_si if int_film# Inside when 'DemisingFloor', 'InteriorFloor' film_r_si += film_int_surf_ht_flow_up_r_si if ext_film # Outside film_r_si += film_int_surf_ht_flow_dwn_r_si if int_film # Inside when 'InteriorCeiling' film_r_si += film_int_surf_ht_flow_dwn_r_si if ext_film # Outside film_r_si += film_int_surf_ht_flow_up_r_si if int_film # Inside when 'DemisingWall', 'InteriorWall', 'InteriorPartition', 'InteriorWindow', 'InteriorDoor' film_r_si += fil_int_surf_vertical_r_si if ext_film # Outside film_r_si += fil_int_surf_vertical_r_si if int_film # Inside when 'DemisingRoof', 'ExteriorRoof', 'Skylight', 'TubularDaylightDome', 'TubularDaylightDiffuser' film_r_si += film_ext_surf_r_si if ext_film # Outside film_r_si += film_int_surf_ht_flow_up_r_si if int_film # Inside when 'ExteriorFloor' film_r_si += film_ext_surf_r_si if ext_film # Outside film_r_si += film_int_surf_ht_flow_dwn_r_si if int_film # Inside when 'ExteriorWall', 'ExteriorWindow', 'ExteriorDoor', 'GlassDoor', 'OverheadDoor' film_r_si += film_ext_surf_r_si if ext_film # Outside film_r_si += fil_int_surf_vertical_r_si if int_film # Inside when 'GroundContactFloor' film_r_si += film_int_surf_ht_flow_dwn_r_si if int_film # Inside when 'GroundContactWall' film_r_si += fil_int_surf_vertical_r_si if int_film # Inside when 'GroundContactRoof' film_r_si += film_int_surf_ht_flow_up_r_si if int_film # Inside end return film_r_si end |
#headered_pumps_variable_speed_set_control_type(headered_pumps_variable_speed, control_type) ⇒ Object
Set the pump curve coefficients based on the specified control type.
are Riding Curve, VSD No Reset, VSD DP Reset
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# File 'lib/openstudio-standards/standards/Standards.HeaderedPumpsVariableSpeed.rb', line 12 def headered_pumps_variable_speed_set_control_type(headered_pumps_variable_speed, control_type) # Determine the coefficients coeff_a = nil coeff_b = nil coeff_c = nil coeff_d = nil case control_type when 'Constant Flow' coeff_a = 0.0 coeff_b = 1.0 coeff_c = 0.0 coeff_d = 0.0 when 'Riding Curve' coeff_a = 0.0 coeff_b = 3.2485 coeff_c = -4.7443 coeff_d = 2.5294 when 'VSD No Reset' coeff_a = 0.0 coeff_b = 0.5726 coeff_c = -0.301 coeff_d = 0.7347 when 'VSD DP Reset' coeff_a = 0.0 coeff_b = 0.0205 coeff_c = 0.4101 coeff_d = 0.5753 else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.HeaderedPumpsVariableSpeed', "Pump control type '#{control_type}' not recognized, pump coefficients will not be changed.") return false end # Set the coefficients headered_pumps_variable_speed.setCoefficient1ofthePartLoadPerformanceCurve(coeff_a) headered_pumps_variable_speed.setCoefficient2ofthePartLoadPerformanceCurve(coeff_b) headered_pumps_variable_speed.setCoefficient3ofthePartLoadPerformanceCurve(coeff_c) headered_pumps_variable_speed.setCoefficient4ofthePartLoadPerformanceCurve(coeff_d) headered_pumps_variable_speed.setPumpControlType('Intermittent') # Append the control type to the pump name # self.setName("#{self.name} #{control_type}") return true end |
#heat_exchanger_air_to_air_sensible_and_latent_apply_efficiency(heat_exchanger_air_to_air_sensible_and_latent) ⇒ Object
Sets the minimum effectiveness of the heat exchanger per the standard.
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# File 'lib/openstudio-standards/standards/Standards.HeatExchangerSensLat.rb', line 6 def heat_exchanger_air_to_air_sensible_and_latent_apply_efficiency(heat_exchanger_air_to_air_sensible_and_latent) # Assumed to be sensible and latent at all flow min_effct = heat_exchanger_air_to_air_sensible_and_latent_minimum_efficiency(heat_exchanger_air_to_air_sensible_and_latent) heat_exchanger_air_to_air_sensible_and_latent.setSensibleEffectivenessat100HeatingAirFlow(min_effct) heat_exchanger_air_to_air_sensible_and_latent.setLatentEffectivenessat100HeatingAirFlow(min_effct) heat_exchanger_air_to_air_sensible_and_latent.setSensibleEffectivenessat75HeatingAirFlow(min_effct) heat_exchanger_air_to_air_sensible_and_latent.setLatentEffectivenessat75HeatingAirFlow(min_effct) heat_exchanger_air_to_air_sensible_and_latent.setSensibleEffectivenessat100CoolingAirFlow(min_effct) heat_exchanger_air_to_air_sensible_and_latent.setLatentEffectivenessat100CoolingAirFlow(min_effct) heat_exchanger_air_to_air_sensible_and_latent.setSensibleEffectivenessat75CoolingAirFlow(min_effct) heat_exchanger_air_to_air_sensible_and_latent.setLatentEffectivenessat75CoolingAirFlow(min_effct) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.HeatExchangerAirToAirSensibleAndLatent', "For #{heat_exchanger_air_to_air_sensible_and_latent.name}: Set sensible and latent effectiveness to #{(min_effct * 100).round}%.") return true end |
#heat_exchanger_air_to_air_sensible_and_latent_apply_prototype_nominal_electric_power(heat_exchanger_air_to_air_sensible_and_latent) ⇒ Object
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.HeatExchangerAirToAirSensibleAndLatent.rb', line 4 def heat_exchanger_air_to_air_sensible_and_latent_apply_prototype_nominal_electric_power(heat_exchanger_air_to_air_sensible_and_latent) # Get the nominal supply air flow rate supply_air_flow_m3_per_s = nil if heat_exchanger_air_to_air_sensible_and_latent.nominalSupplyAirFlowRate.is_initialized supply_air_flow_m3_per_s = heat_exchanger_air_to_air_sensible_and_latent.nominalSupplyAirFlowRate.get elsif heat_exchanger_air_to_air_sensible_and_latent.autosizedNominalSupplyAirFlowRate.is_initialized supply_air_flow_m3_per_s = heat_exchanger_air_to_air_sensible_and_latent.autosizedNominalSupplyAirFlowRate.get else # Get the min OA flow rate from the OA # system if the ERV was not on the system during sizing. # This prevents us from having to perform a second sizing run. controller_oa = nil oa_system = nil # Get the air loop air_loop = heat_exchanger_air_to_air_sensible_and_latent.airLoopHVAC if air_loop.empty? OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.HeatExchangerAirToAirSensibleAndLatent', "For #{heat_exchanger_air_to_air_sensible_and_latent.name}, cannot get the air loop and therefore cannot get the min OA flow.") return false end air_loop = air_loop.get # Get the OA system if air_loop.airLoopHVACOutdoorAirSystem.is_initialized oa_system = air_loop.airLoopHVACOutdoorAirSystem.get controller_oa = oa_system.getControllerOutdoorAir else OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.HeatExchangerAirToAirSensibleAndLatent', "For #{heat_exchanger_air_to_air_sensible_and_latent.name}, cannot find the min OA flow because it has no OA intake.") return false end # Get the min OA flow rate from the OA if controller_oa.minimumOutdoorAirFlowRate.is_initialized supply_air_flow_m3_per_s = controller_oa.minimumOutdoorAirFlowRate.get elsif controller_oa.autosizedMinimumOutdoorAirFlowRate.is_initialized supply_air_flow_m3_per_s = controller_oa.autosizedMinimumOutdoorAirFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.prototype.HeatExchangerAirToAirSensibleAndLatent', "For #{heat_exchanger_air_to_air_sensible_and_latent.name}, ERV minimum OA flow rate is not available, cannot apply prototype nominal power assumption.") return false end end # Convert the flow rate to cfm supply_air_flow_cfm = OpenStudio.convert(supply_air_flow_m3_per_s, 'm^3/s', 'cfm').get # Calculate the motor power for the rotatry wheel per: # Power (W) = (Nominal Supply Air Flow Rate (CFM) * 0.3386) + 49.5 # power = (supply_air_flow_cfm * 0.3386) + 49.5 # Calculate the motor power for the rotatry wheel per: # Power (W) = (Minimum Outdoor Air Flow Rate (m^3/s) * 212.5 / 0.5) + (Minimum Outdoor Air Flow Rate (m^3/s) * 162.5 / 0.5) + 50 power = (supply_air_flow_m3_per_s * 212.5 / 0.5) + (supply_air_flow_m3_per_s * 0.9 * 162.5 / 0.5) + 50 OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.HeatExchangerAirToAirSensibleAndLatent', "For #{heat_exchanger_air_to_air_sensible_and_latent.name}, ERV power is calculated to be #{power.round} W, based on a min OA flow of #{supply_air_flow_cfm.round} cfm.") # Set the power for the HX heat_exchanger_air_to_air_sensible_and_latent.setNominalElectricPower(power) return true end |
#heat_exchanger_air_to_air_sensible_and_latent_minimum_efficiency(heat_exchanger_air_to_air_sensible_and_latent) ⇒ Object
Defines the minimum sensible and latent effectiveness of the heat exchanger. Assumed to apply to sensible and latent effectiveness at all flow rates.
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# File 'lib/openstudio-standards/standards/Standards.HeatExchangerSensLat.rb', line 29 def heat_exchanger_air_to_air_sensible_and_latent_minimum_efficiency(heat_exchanger_air_to_air_sensible_and_latent) min_effct = 0.5 return min_effct end |
#heating_design_outdoor_temperatures ⇒ Array<Double>
Gets the maximum OA dry bulb temperatures for all WinterDesignDays in the model.
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# File 'lib/openstudio-standards/weather/Weather.Model.rb', line 196 def heating_design_outdoor_temperatures heating_design_outdoor_temps = [] getDesignDays.each do |dd| next unless dd.dayType == 'WinterDesignDay' heating_design_outdoor_temps << dd.maximumDryBulbTemperature end return heating_design_outdoor_temps end |
#hspf_to_cop_heating_no_fan(hspf) ⇒ Double
Convert from HSPF to COP (no fan) for heat pump heating coils
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 158 def hspf_to_cop_heating_no_fan(hspf) cop = -0.0296 * hspf * hspf + 0.7134 * hspf return cop end |
#intialize ⇒ Object
set up template class variable.
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# File 'lib/openstudio-standards/standards/standard.rb', line 41 def intialize super() end |
#kw_per_ton_to_cop(kw_per_ton) ⇒ Double
A helper method to convert from kW/ton to COP
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 250 def kw_per_ton_to_cop(kw_per_ton) return 3.517 / kw_per_ton end |
#load_hvac_map(hvac_map_file) ⇒ Hash
Loads a JSON file containing the space type map into a hash
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 109 def load_hvac_map(hvac_map_file) # Load the geometry .osm from relative to the data folder rel_path_to_hvac_map = "../../../../../data/#{hvac_map_file}" # Load the JSON depending on whether running from normal gem location # or from the embedded location in the OpenStudio CLI if File.dirname(__FILE__)[0] == ':' # running from embedded location in OpenStudio CLI hvac_map_string = load_resource_relative(rel_path_to_hvac_map) hvac_map = JSON.parse(hvac_map_string) else abs_path = File.join(File.dirname(__FILE__), rel_path_to_hvac_map) hvac_map = JSON.parse(File.read(abs_path))if File.exist?(abs_path) end return hvac_map end |
#load_standards_database ⇒ Hash
Loads the default openstudio standards dataset.
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# File 'lib/openstudio-standards/standards/standard.rb', line 75 def load_standards_database standards_files = [] standards_files << 'OpenStudio_Standards_boilers.json' standards_files << 'OpenStudio_Standards_chillers.json' standards_files << 'OpenStudio_Standards_climate_zone_sets.json' standards_files << 'OpenStudio_Standards_climate_zones.json' standards_files << 'OpenStudio_Standards_construction_properties.json' standards_files << 'OpenStudio_Standards_construction_sets.json' standards_files << 'OpenStudio_Standards_constructions.json' standards_files << 'OpenStudio_Standards_curves.json' standards_files << 'OpenStudio_Standards_ground_temperatures.json' standards_files << 'OpenStudio_Standards_heat_pumps_heating.json' standards_files << 'OpenStudio_Standards_heat_pumps.json' standards_files << 'OpenStudio_Standards_materials.json' standards_files << 'OpenStudio_Standards_motors.json' standards_files << 'OpenStudio_Standards_prototype_inputs.json' standards_files << 'OpenStudio_Standards_schedules.json' standards_files << 'OpenStudio_Standards_space_types.json' standards_files << 'OpenStudio_Standards_templates.json' standards_files << 'OpenStudio_Standards_unitary_acs.json' standards_files << 'OpenStudio_Standards_heat_rejection.json' standards_files << 'OpenStudio_Standards_exterior_lighting.json' standards_files << 'OpenStudio_Standards_parking.json' standards_files << 'OpenStudio_Standards_entryways.json' standards_files << 'OpenStudio_Standards_necb_climate_zones.json' standards_files << 'OpenStudio_Standards_necb_fdwr.json' standards_files << 'OpenStudio_Standards_necb_hvac_system_selection_type.json' standards_files << 'OpenStudio_Standards_necb_surface_conductances.json' standards_files << 'OpenStudio_Standards_water_heaters.json' standards_files << 'OpenStudio_Standards_economizers.json' standards_files << 'OpenStudio_Standards_refrigerated_cases.json' standards_files << 'OpenStudio_Standards_walkin_refrigeration.json' standards_files << 'OpenStudio_Standards_refrigeration_compressors.json' # standards_files << 'OpenStudio_Standards_unitary_hps.json' # Combine the data from the JSON files into a single hash top_dir = File.('../../..', File.dirname(__FILE__)) standards_data_dir = "#{top_dir}/data/standards" @standards_data = {} standards_files.sort.each do |standards_file| temp = '' if __dir__[0] == ':' # Running from OpenStudio CLI temp = load_resource_relative("../../../data/standards/#{standards_file}", 'r:UTF-8') else File.open("#{standards_data_dir}/#{standards_file}", 'r:UTF-8') do |f| temp = f.read end end file_hash = JSON.parse(temp) @standards_data = @standards_data.merge(file_hash) end # Check that standards data was loaded if @standards_data.keys.size.zero? OpenStudio.logFree(OpenStudio::Error, 'OpenStudio Standards JSON data was not loaded correctly.') end return @standards_data end |
#model_add_baseboard(model, hot_water_loop, thermal_zones) ⇒ Array<OpenStudio::Model::ZoneHVACBaseboardConvectiveElectric, OpenStudio::Model::ZoneHVACBaseboardConvectiveWater>
Adds hydronic or electric baseboard heating to each zone.
the hot water loop that serves the baseboards. If nil, baseboards are electric. array of baseboard heaters.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4862 def model_add_baseboard(model, hot_water_loop, thermal_zones) # Make a baseboard heater for each zone baseboards = [] thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding baseboard heat for #{zone.name}.") if hot_water_loop.nil? baseboard = OpenStudio::Model::ZoneHVACBaseboardConvectiveElectric.new(model) baseboard.setName("#{zone.name} Electric Baseboard") baseboard.addToThermalZone(zone) baseboards << baseboard else htg_coil = OpenStudio::Model::CoilHeatingWaterBaseboard.new(model) htg_coil.setName("#{zone.name} Hydronic Baseboard Coil") hot_water_loop.addDemandBranchForComponent(htg_coil) baseboard = OpenStudio::Model::ZoneHVACBaseboardConvectiveWater.new(model, model.alwaysOnDiscreteSchedule, htg_coil) baseboard.setName("#{zone.name} Hydronic Baseboard") baseboard.addToThermalZone(zone) baseboards << baseboard end end return baseboards end |
#model_add_booster_swh_end_uses(model, swh_booster_loop, peak_flowrate, flowrate_schedule, water_use_temperature, building_type = nil) ⇒ OpenStudio::Model::WaterUseEquipment
Creates water fixtures and attaches them to the supplied booster water loop.
the booster water loop to add water fixtures to. the resulting water fixture.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4583 def model_add_booster_swh_end_uses(model, swh_booster_loop, peak_flowrate, flowrate_schedule, water_use_temperature, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding water fixture to #{swh_booster_loop.name}.") # Water use connection swh_connection = OpenStudio::Model::WaterUseConnections.new(model) # Water fixture definition water_fixture_def = OpenStudio::Model::WaterUseEquipmentDefinition.new(model) rated_flow_rate_m3_per_s = peak_flowrate rated_flow_rate_gal_per_min = OpenStudio.convert(rated_flow_rate_m3_per_s, 'm^3/s', 'gal/min').get water_fixture_def.setName("Water Fixture Def - #{rated_flow_rate_gal_per_min} gal/min") water_fixture_def.setPeakFlowRate(rated_flow_rate_m3_per_s) # Target mixed water temperature mixed_water_temp_f = OpenStudio.convert(water_use_temperature, 'F', 'C').get mixed_water_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) mixed_water_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), OpenStudio.convert(mixed_water_temp_f, 'F', 'C').get) water_fixture_def.setTargetTemperatureSchedule(mixed_water_temp_sch) # Water use equipment water_fixture = OpenStudio::Model::WaterUseEquipment.new(water_fixture_def) water_fixture.setName("Booster Water Fixture - #{rated_flow_rate_gal_per_min} gal/min at #{mixed_water_temp_f}F") schedule = model_add_schedule(model, flowrate_schedule) water_fixture.setFlowRateFractionSchedule(schedule) swh_connection.addWaterUseEquipment(water_fixture) # Connect the water use connection to the SWH loop swh_booster_loop.addDemandBranchForComponent(swh_connection) return water_fixture end |
#model_add_cav(model, sys_name, hot_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, fan_efficiency, fan_motor_efficiency, fan_pressure_rise, chilled_water_loop = nil, building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
Creates a packaged VAV system and adds it to the model.
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 1493 def model_add_cav(model, sys_name, hot_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, fan_efficiency, fan_motor_efficiency, fan_pressure_rise, chilled_water_loop = nil, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding CAV for #{thermal_zones.size} zones.") thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Model.Model', "---#{zone.name}") end # hvac operation schedule hvac_op_sch = if hvac_op_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, hvac_op_sch) end # oa damper schedule oa_damper_sch = if oa_damper_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, oa_damper_sch) end # Hot water loop control temperatures hw_temp_f = 152.6 # HW setpoint 152.6F if building_type == 'Hospital' hw_temp_f = 180 end hw_delta_t_r = 20 # 20F delta-T hw_temp_c = OpenStudio.convert(hw_temp_f, 'F', 'C').get hw_delta_t_k = OpenStudio.convert(hw_delta_t_r, 'R', 'K').get air_flow_ratio = 1 # Air handler control temperatures clg_sa_temp_f = 55.04 # Central deck clg temp 55F prehtg_sa_temp_f = 44.6 # Preheat to 44.6F if building_type == 'Hospital' prehtg_sa_temp_f = 55.04 end preclg_sa_temp_f = 55.04 # Precool to 55F htg_sa_temp_f = 62.06 # Central deck htg temp 62.06F rht_sa_temp_f = 122 # VAV box reheat to 104F zone_htg_sa_temp_f = 122 # Zone heating design supply air temperature to 122F if building_type == 'Hospital' htg_sa_temp_f = 104 # Central deck htg temp 104F # rht_sa_temp_f = 122 # VAV box reheat to 104F zone_htg_sa_temp_f = 104 # Zone heating design supply air temperature to 122F end clg_sa_temp_c = OpenStudio.convert(clg_sa_temp_f, 'F', 'C').get prehtg_sa_temp_c = OpenStudio.convert(prehtg_sa_temp_f, 'F', 'C').get preclg_sa_temp_c = OpenStudio.convert(preclg_sa_temp_f, 'F', 'C').get htg_sa_temp_c = OpenStudio.convert(htg_sa_temp_f, 'F', 'C').get rht_sa_temp_c = OpenStudio.convert(rht_sa_temp_f, 'F', 'C').get zone_htg_sa_temp_c = OpenStudio.convert(zone_htg_sa_temp_f, 'F', 'C').get # Air handler air_loop = OpenStudio::Model::AirLoopHVAC.new(model) if sys_name.nil? air_loop.setName("#{thermal_zones.size} Zone CAV") else air_loop.setName(sys_name) end air_loop.setAvailabilitySchedule(hvac_op_sch) # Air handler supply air setpoint sa_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) sa_temp_sch.setName("Supply Air Temp - #{clg_sa_temp_f}F") sa_temp_sch.defaultDaySchedule.setName("Supply Air Temp - #{clg_sa_temp_f}F Default") sa_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), clg_sa_temp_c) sa_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, sa_temp_sch) sa_stpt_manager.setName("#{air_loop.name} supply air setpoint manager") sa_stpt_manager.addToNode(air_loop.supplyOutletNode) # Air handler sizing sizing_system = air_loop.sizingSystem sizing_system.setMinimumSystemAirFlowRatio(air_flow_ratio) sizing_system.setPreheatDesignTemperature(prehtg_sa_temp_c) sizing_system.setPrecoolDesignTemperature(preclg_sa_temp_c) sizing_system.setCentralCoolingDesignSupplyAirTemperature(clg_sa_temp_c) sizing_system.setCentralHeatingDesignSupplyAirTemperature(htg_sa_temp_c) if building_type == 'Hospital' sizing_system.setSizingOption('NonCoincident') else sizing_system.setSizingOption('Coincident') end sizing_system.setAllOutdoorAirinCooling(false) sizing_system.setAllOutdoorAirinHeating(false) sizing_system.setSystemOutdoorAirMethod('ZoneSum') # Fan fan = OpenStudio::Model::FanConstantVolume.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{air_loop.name} Fan") if building_type == 'Hospital' fan.setFanEfficiency(0.61425) fan.setMotorEfficiency(0.945) fan.setPressureRise(1018.41) else fan.setFanEfficiency(fan_efficiency) fan.setMotorEfficiency(fan_motor_efficiency) fan.setPressureRise(fan_pressure_rise) end fan.addToNode(air_loop.supplyInletNode) fan.setEndUseSubcategory('CAV system Fans') # Air handler heating coil htg_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) htg_coil.addToNode(air_loop.supplyInletNode) hot_water_loop.addDemandBranchForComponent(htg_coil) htg_coil.setName("#{air_loop.name} Main Htg Coil") htg_coil.controllerWaterCoil.get.setName("#{air_loop.name} Main Htg Coil Controller") htg_coil.setRatedInletWaterTemperature(hw_temp_c) htg_coil.setRatedInletAirTemperature(prehtg_sa_temp_c) htg_coil.setRatedOutletWaterTemperature(hw_temp_c - hw_delta_t_k) htg_coil.setRatedOutletAirTemperature(htg_sa_temp_c) # Air handler cooling coil if chilled_water_loop.nil? clg_coil = OpenStudio::Model::CoilCoolingDXTwoSpeed.new(model) else clg_coil = OpenStudio::Model::CoilCoolingWater.new(model, model.alwaysOnDiscreteSchedule) clg_coil.setHeatExchangerConfiguration('CrossFlow') chilled_water_loop.addDemandBranchForComponent(clg_coil) clg_coil.controllerWaterCoil.get.setName("#{air_loop.name} Clg Coil Controller") end clg_coil.setName("#{air_loop.name} Clg Coil") clg_coil.addToNode(air_loop.supplyInletNode) # Outdoor air intake system oa_intake_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_intake_controller.setName("#{air_loop.name} OA Controller") oa_intake_controller.setMinimumLimitType('FixedMinimum') oa_intake_controller.autosizeMinimumOutdoorAirFlowRate # oa_intake_controller.setMinimumOutdoorAirSchedule(motorized_oa_damper_sch) oa_intake_controller.setMinimumFractionofOutdoorAirSchedule(oa_damper_sch) controller_mv = oa_intake_controller.controllerMechanicalVentilation controller_mv.setName("#{air_loop.name} Vent Controller") controller_mv.setSystemOutdoorAirMethod('ZoneSum') oa_intake = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_intake_controller) oa_intake.setName("#{air_loop.name} OA Sys") oa_intake.addToNode(air_loop.supplyInletNode) # The oa system needs to be added before setting the night cycle control air_loop.setNightCycleControlType('CycleOnAny') # Connect the CAV system to each zone thermal_zones.each do |zone| if building_type == 'Hospital' # CAV terminal terminal = OpenStudio::Model::AirTerminalSingleDuctUncontrolled.new(model, model.alwaysOnDiscreteSchedule) terminal.setName("#{zone.name} CAV Term") else # Reheat coil rht_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) rht_coil.setName("#{zone.name} Rht Coil") rht_coil.setRatedInletWaterTemperature(hw_temp_c) rht_coil.setRatedInletAirTemperature(htg_sa_temp_c) rht_coil.setRatedOutletWaterTemperature(hw_temp_c - hw_delta_t_k) rht_coil.setRatedOutletAirTemperature(rht_sa_temp_c) hot_water_loop.addDemandBranchForComponent(rht_coil) # VAV terminal terminal = OpenStudio::Model::AirTerminalSingleDuctVAVReheat.new(model, model.alwaysOnDiscreteSchedule, rht_coil) terminal.setName("#{zone.name} VAV Term") terminal.setZoneMinimumAirFlowMethod('Constant') air_terminal_single_duct_vav_reheat_apply_initial_prototype_damper_position(terminal, building_type, thermal_zone_outdoor_airflow_rate_per_area(zone)) terminal.setMaximumFlowPerZoneFloorAreaDuringReheat(0.0) terminal.setMaximumFlowFractionDuringReheat(0.5) terminal.setMaximumReheatAirTemperature(rht_sa_temp_c) end air_loop.addBranchForZone(zone, terminal.to_StraightComponent) # Zone sizing # TODO Create general logic for cooling airflow method. # Large hotel uses design day with limit, school uses design day. sizing_zone = zone.sizingZone if building_type == 'SecondarySchool' sizing_zone.setCoolingDesignAirFlowMethod('DesignDay') else sizing_zone.setCoolingDesignAirFlowMethod('DesignDayWithLimit') end sizing_zone.setHeatingDesignAirFlowMethod('DesignDay') sizing_zone.setZoneCoolingDesignSupplyAirTemperature(clg_sa_temp_c) # sizing_zone.setZoneHeatingDesignSupplyAirTemperature(rht_sa_temp_c) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(zone_htg_sa_temp_c) end # Set the damper action based on the template. air_loop_hvac_apply_vav_damper_action(air_loop) return true end |
#model_add_central_air_source_heat_pump(model, thermal_zones, heating, cooling, ventilation) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Adds an air source heat pump to each zone. Code adapted from: github.com/NREL/OpenStudio-BEopt/blob/master/measures/ResidentialHVACAirSourceHeatPumpSingleSpeed/measure.rb
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5213 def model_add_central_air_source_heat_pump(model, thermal_zones, heating, cooling, ventilation) equip_name = 'Central Air Source HP' # Defaults fan_pressure_rise_in = 0.5 # 0.5 in W.C. hspf = 7.7 seer = 13 eer = 11.4 cop = 3.05 shr = 0.73 ac_w_per_cfm = 0.365 min_hp_oat_f = 0 sat_htg_f = 120 sat_clg_f = 55 crank_case_heat_w = 0 crank_case_max_temp_f = 55 # Unit conversion fan_pressure_rise_pa = OpenStudio.convert(fan_pressure_rise_in, 'inH_{2}O', 'Pa').get # Performance curves # These coefficients are in IP UNITS cool_cap_ft_coeffs_ip = [3.68637657, -0.098352478, 0.000956357, 0.005838141, -0.0000127, -0.000131702] cool_eir_ft_coeffs_ip = [-3.437356399, 0.136656369, -0.001049231, -0.0079378, 0.000185435, -0.0001441] cool_cap_fflow_coeffs = [0.718664047, 0.41797409, -0.136638137] cool_eir_fflow_coeffs = [1.143487507, -0.13943972, -0.004047787] cool_plf_fplr_coeffs = [0.8, 0.2, 0] heat_cap_ft_coeffs_ip = [0.566333415, -0.000744164, -0.0000103, 0.009414634, 0.0000506, -0.00000675] heat_eir_ft_coeffs_ip = [0.718398423, 0.003498178, 0.000142202, -0.005724331, 0.00014085, -0.000215321] heat_cap_fflow_coeffs = [0.694045465, 0.474207981, -0.168253446] heat_eir_fflow_coeffs = [2.185418751, -1.942827919, 0.757409168] heat_plf_fplr_coeffs = [0.8, 0.2, 0] defrost_eir_coeffs = [0.1528, 0, 0, 0, 0, 0] # Convert coefficients from IP to SI cool_cap_ft_coeffs_si = convert_curve_biquadratic(cool_cap_ft_coeffs_ip) cool_eir_ft_coeffs_si = convert_curve_biquadratic(cool_eir_ft_coeffs_ip) heat_cap_ft_coeffs_si = convert_curve_biquadratic(heat_cap_ft_coeffs_ip) heat_eir_ft_coeffs_si = convert_curve_biquadratic(heat_eir_ft_coeffs_ip) # Make the curves cool_cap_ft = create_curve_biquadratic(cool_cap_ft_coeffs_si, 'Cool-Cap-fT', 0, 100, 0, 100, nil, nil) cool_cap_fff = create_curve_quadratic(cool_cap_fflow_coeffs, 'Cool-Cap-fFF', 0, 2, 0, 2, is_dimensionless = true) cool_eir_ft = create_curve_biquadratic(cool_eir_ft_coeffs_si, 'Cool-EIR-fT', 0, 100, 0, 100, nil, nil) cool_eir_fff = create_curve_quadratic(cool_eir_fflow_coeffs, 'Cool-EIR-fFF', 0, 2, 0, 2, is_dimensionless = true) cool_plf_fplr = create_curve_quadratic(cool_plf_fplr_coeffs, 'Cool-PLF-fPLR', 0, 1, 0, 1, is_dimensionless = true) heat_cap_ft = create_curve_biquadratic(heat_cap_ft_coeffs_si, 'Heat-Cap-fT', 0, 100, 0, 100, nil, nil) heat_cap_fff = create_curve_quadratic(heat_cap_fflow_coeffs, 'Heat-Cap-fFF', 0, 2, 0, 2, is_dimensionless = true) heat_eir_ft = create_curve_biquadratic(heat_eir_ft_coeffs_si, 'Heat-EIR-fT', 0, 100, 0, 100, nil, nil) heat_eir_fff = create_curve_quadratic(heat_eir_fflow_coeffs, 'Heat-EIR-fFF', 0, 2, 0, 2, is_dimensionless = true) heat_plf_fplr = create_curve_quadratic(heat_plf_fplr_coeffs, 'Heat-PLF-fPLR', 0, 1, 0, 1, is_dimensionless = true) # Heating defrost curve for reverse cycle defrost_eir_curve = create_curve_biquadratic(defrost_eir_coeffs, 'DefrostEIR', -100, 100, -100, 100, nil, nil) # Unit conversion fan_pressure_rise_pa = OpenStudio.convert(fan_pressure_rise_in, 'inH_{2}O', 'Pa').get hps = [] thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding furnace AC for #{zone.name}.") air_loop_name = "#{zone.name} #{equip_name}" air_loop = OpenStudio::Model::AirLoopHVAC.new(model) air_loop.setName(air_loop_name.to_s) # Heating Coil htg_coil = nil supp_htg_coil = nil if heating htg_coil = OpenStudio::Model::CoilHeatingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, heat_cap_ft, heat_cap_fff, heat_eir_ft, heat_eir_fff, heat_plf_fplr) htg_coil.setName("#{air_loop_name} heating coil") htg_coil.setRatedCOP(hspf_to_cop_heating_no_fan(hspf)) htg_coil.setRatedSupplyFanPowerPerVolumeFlowRate(ac_w_per_cfm / OpenStudio.convert(1.0, 'cfm', 'm^3/s').get) htg_coil.setDefrostEnergyInputRatioFunctionofTemperatureCurve(defrost_eir_curve) htg_coil.setMinimumOutdoorDryBulbTemperatureforCompressorOperation(OpenStudio.convert(min_hp_oat_f, 'F', 'C').get) htg_coil.setMaximumOutdoorDryBulbTemperatureforDefrostOperation(OpenStudio.convert(40.0, 'F', 'C').get) htg_coil.setCrankcaseHeaterCapacity(crank_case_heat_w) htg_coil.setMaximumOutdoorDryBulbTemperatureforCrankcaseHeaterOperation(OpenStudio.convert(crank_case_max_temp_f, 'F', 'C').get) htg_coil.setDefrostStrategy('ReverseCycle') htg_coil.setDefrostControl('OnDemand') # Supplemental Heating Coil supp_htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) supp_htg_coil.setName("#{air_loop_name} supp htg coil") supp_htg_coil.setEfficiency(1) end # Cooling Coil clg_coil = nil if cooling clg_coil = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, cool_cap_ft, cool_cap_fff, cool_eir_ft, cool_eir_fff, cool_plf_fplr) clg_coil.setName("#{air_loop_name} cooling coil") clg_coil.setRatedSensibleHeatRatio(shr) clg_coil.setRatedCOP(OpenStudio::OptionalDouble.new(cop)) clg_coil.setRatedEvaporatorFanPowerPerVolumeFlowRate(OpenStudio::OptionalDouble.new(ac_w_per_cfm / OpenStudio.convert(1.0, 'cfm', 'm^3/s').get)) clg_coil.setNominalTimeForCondensateRemovalToBegin(OpenStudio::OptionalDouble.new(1000.0)) clg_coil.setRatioOfInitialMoistureEvaporationRateAndSteadyStateLatentCapacity(OpenStudio::OptionalDouble.new(1.5)) clg_coil.setMaximumCyclingRate(OpenStudio::OptionalDouble.new(3.0)) clg_coil.setLatentCapacityTimeConstant(OpenStudio::OptionalDouble.new(45.0)) clg_coil.setCondenserType('AirCooled') clg_coil.setCrankcaseHeaterCapacity(OpenStudio::OptionalDouble.new(crank_case_heat_w)) clg_coil.setMaximumOutdoorDryBulbTemperatureForCrankcaseHeaterOperation(OpenStudio::OptionalDouble.new(OpenStudio.convert(crank_case_max_temp_f, 'F', 'C').get)) end # Fan fan = OpenStudio::Model::FanOnOff.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{air_loop_name} supply fan") fan.setEndUseSubcategory('residential hvac fan') fan.setFanEfficiency(0.6) # Overall Efficiency of the Supply Fan, Motor and Drive fan.setPressureRise(fan_pressure_rise_pa) fan.setMotorEfficiency(1) fan.setMotorInAirstreamFraction(1) # Outdoor Air Intake oa_intake_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_intake_controller.setName("#{air_loop.name} OA Controller") oa_intake_controller.autosizeMinimumOutdoorAirFlowRate oa_intake = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_intake_controller) oa_intake.setName("#{air_loop.name} OA Sys") oa_intake.addToNode(air_loop.supplyInletNode) unless ventilation # Disable the OA oa_intake_controller.setMinimumOutdoorAirSchedule(alwaysOffDiscreteSchedule) end # Unitary System (holds the coils and fan) unitary = OpenStudio::Model::AirLoopHVACUnitarySystem.new(model) unitary.setName("#{air_loop_name} zoneunitary system") unitary.setAvailabilitySchedule(model.alwaysOnDiscreteSchedule) unitary.setMaximumSupplyAirTemperature(OpenStudio.convert(170.0, 'F', 'C').get) # higher temp for supplemental heat as to not severely limit its use, resulting in unmet hours. unitary.setMaximumOutdoorDryBulbTemperatureforSupplementalHeaterOperation(OpenStudio.convert(40.0, 'F', 'C').get) unitary.setControllingZoneorThermostatLocation(zone) unitary.addToNode(air_loop.supplyInletNode) # Set flow rates during different conditions unitary.setSupplyAirFlowRateWhenNoCoolingorHeatingisRequired(0) unless ventilation # Attach the coils and fan unitary.setHeatingCoil(htg_coil) if htg_coil unitary.setCoolingCoil(clg_coil) if clg_coil unitary.setSupplementalHeatingCoil(supp_htg_coil) if supp_htg_coil unitary.setSupplyFan(fan) unitary.setFanPlacement('BlowThrough') unitary.(alwaysOffDiscreteSchedule) # Diffuser diffuser = OpenStudio::Model::AirTerminalSingleDuctUncontrolled.new(model, model.alwaysOnDiscreteSchedule) diffuser.setName(" #{zone.name} direct air") air_loop.addBranchForZone(zone, diffuser) hps << air_loop end return hps end |
#model_add_chw_loop(model, chw_pumping_type, chiller_cooling_type, chiller_condenser_type, chiller_compressor_type, cooling_fuel, condenser_water_loop = nil, building_type = nil, num_chillers = 1) ⇒ OpenStudio::Model::PlantLoop
Electricity, DistrictCooling
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 131 def model_add_chw_loop(model, chw_pumping_type, chiller_cooling_type, chiller_condenser_type, chiller_compressor_type, cooling_fuel, condenser_water_loop = nil, building_type = nil, num_chillers = 1) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', 'Adding chilled water loop.') # Chilled water loop chilled_water_loop = OpenStudio::Model::PlantLoop.new(model) chilled_water_loop.setName('Chilled Water Loop') chilled_water_loop.setMaximumLoopTemperature(98) chilled_water_loop.setMinimumLoopTemperature(1) # Chilled water loop controls chw_temp_f = 44 # CHW setpoint 44F chw_delta_t_r = 10.1 # 10.1F delta-T # TODO: Yixing check the CHW Setpoint from standards # TODO: Should be a OutdoorAirReset, see the changes I've made in Standards.PlantLoop.apply_prm_baseline_temperatures if building_type == 'LargeHotel' chw_temp_f = 45 # CHW setpoint 45F chw_delta_t_r = 12 # 12F delta-T end chw_temp_c = OpenStudio.convert(chw_temp_f, 'F', 'C').get chw_delta_t_k = OpenStudio.convert(chw_delta_t_r, 'R', 'K').get chw_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) chw_temp_sch.setName("Chilled Water Loop Temp - #{chw_temp_f}F") chw_temp_sch.defaultDaySchedule.setName("Chilled Water Loop Temp - #{chw_temp_f}F Default") chw_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), chw_temp_c) chw_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, chw_temp_sch) chw_stpt_manager.setName('Chilled water loop setpoint manager') chw_stpt_manager.addToNode(chilled_water_loop.supplyOutletNode) sizing_plant = chilled_water_loop.sizingPlant sizing_plant.setLoopType('Cooling') sizing_plant.setDesignLoopExitTemperature(chw_temp_c) sizing_plant.setLoopDesignTemperatureDifference(chw_delta_t_k) # Chilled water pumps if chw_pumping_type == 'const_pri' # Primary chilled water pump pri_chw_pump = OpenStudio::Model::PumpVariableSpeed.new(model) pri_chw_pump.setName('Chilled Water Loop Pump') pri_chw_pump_head_ft_h2o = 60.0 pri_chw_pump_head_press_pa = OpenStudio.convert(pri_chw_pump_head_ft_h2o, 'ftH_{2}O', 'Pa').get pri_chw_pump.setRatedPumpHead(pri_chw_pump_head_press_pa) pri_chw_pump.setMotorEfficiency(0.9) # Flat pump curve makes it behave as a constant speed pump pri_chw_pump.setFractionofMotorInefficienciestoFluidStream(0) pri_chw_pump.setCoefficient1ofthePartLoadPerformanceCurve(0) pri_chw_pump.setCoefficient2ofthePartLoadPerformanceCurve(1) pri_chw_pump.setCoefficient3ofthePartLoadPerformanceCurve(0) pri_chw_pump.setCoefficient4ofthePartLoadPerformanceCurve(0) pri_chw_pump.setPumpControlType('Intermittent') pri_chw_pump.addToNode(chilled_water_loop.supplyInletNode) elsif chw_pumping_type == 'const_pri_var_sec' # Primary chilled water pump pri_chw_pump = OpenStudio::Model::PumpConstantSpeed.new(model) pri_chw_pump.setName('Chilled Water Loop Primary Pump') pri_chw_pump_head_ft_h2o = 15 pri_chw_pump_head_press_pa = OpenStudio.convert(pri_chw_pump_head_ft_h2o, 'ftH_{2}O', 'Pa').get pri_chw_pump.setRatedPumpHead(pri_chw_pump_head_press_pa) pri_chw_pump.setMotorEfficiency(0.9) pri_chw_pump.setPumpControlType('Intermittent') pri_chw_pump.addToNode(chilled_water_loop.supplyInletNode) # Secondary chilled water pump sec_chw_pump = OpenStudio::Model::PumpVariableSpeed.new(model) sec_chw_pump.setName('Chilled Water Loop Secondary Pump') sec_chw_pump_head_ft_h2o = 45 sec_chw_pump_head_press_pa = OpenStudio.convert(sec_chw_pump_head_ft_h2o, 'ftH_{2}O', 'Pa').get sec_chw_pump.setRatedPumpHead(sec_chw_pump_head_press_pa) sec_chw_pump.setMotorEfficiency(0.9) # Curve makes it perform like variable speed pump sec_chw_pump.setFractionofMotorInefficienciestoFluidStream(0) sec_chw_pump.setCoefficient1ofthePartLoadPerformanceCurve(0) sec_chw_pump.setCoefficient2ofthePartLoadPerformanceCurve(0.0205) sec_chw_pump.setCoefficient3ofthePartLoadPerformanceCurve(0.4101) sec_chw_pump.setCoefficient4ofthePartLoadPerformanceCurve(0.5753) sec_chw_pump.setPumpControlType('Intermittent') sec_chw_pump.addToNode(chilled_water_loop.demandInletNode) # Change the chilled water loop to have a two-way common pipes chilled_water_loop.setCommonPipeSimulation('CommonPipe') end # DistrictCooling if cooling_fuel == 'DistrictCooling' dist_clg = OpenStudio::Model::DistrictCooling.new(model) dist_clg.setName('Purchased Cooling') dist_clg.autosizeNominalCapacity chilled_water_loop.addSupplyBranchForComponent(dist_clg) # Chiller else # Make the correct type of chiller based these properties num_chillers.times do |i| chiller = OpenStudio::Model::ChillerElectricEIR.new(model) chiller.setName("#{template} #{chiller_cooling_type} #{chiller_condenser_type} #{chiller_compressor_type} Chiller #{i}") chilled_water_loop.addSupplyBranchForComponent(chiller) chiller.setReferenceLeavingChilledWaterTemperature(chw_temp_c) ref_cond_wtr_temp_f = 95 ref_cond_wtr_temp_c = OpenStudio.convert(ref_cond_wtr_temp_f, 'F', 'C').get chiller.setReferenceEnteringCondenserFluidTemperature(ref_cond_wtr_temp_c) chiller.setMinimumPartLoadRatio(0.15) chiller.setMaximumPartLoadRatio(1.0) chiller.setOptimumPartLoadRatio(1.0) chiller.setMinimumUnloadingRatio(0.25) chiller.setCondenserType('AirCooled') chiller.setLeavingChilledWaterLowerTemperatureLimit(OpenStudio.convert(36, 'F', 'C').get) chiller.setChillerFlowMode('ConstantFlow') if building_type == 'LargeHotel' || building_type == 'Hospital' chiller.setSizingFactor(0.5) end # if building_type == "LargeHotel" # TODO: Yixing. Add the temperature setpoint and change the flow mode will cost the simulation with # thousands of Severe Errors. Need to figure this out later. # chiller.setChillerFlowMode('LeavingSetpointModulated') # chiller_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(self,chw_temp_sch) # chiller_stpt_manager.setName("chiller outlet setpoint manager") # chiller_stpt_manager.addToNode(chiller.supplyOutletModelObject.get.to_Node.get) # end # Connect the chiller to the condenser loop if # one was supplied. if condenser_water_loop condenser_water_loop.addDemandBranchForComponent(chiller) chiller.setCondenserType('WaterCooled') end end end # chilled water loop pipes chiller_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) chilled_water_loop.addSupplyBranchForComponent(chiller_bypass_pipe) coil_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) chilled_water_loop.addDemandBranchForComponent(coil_bypass_pipe) supply_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) supply_outlet_pipe.addToNode(chilled_water_loop.supplyOutletNode) demand_inlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_inlet_pipe.addToNode(chilled_water_loop.demandInletNode) demand_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_outlet_pipe.addToNode(chilled_water_loop.demandOutletNode) return chilled_water_loop end |
#model_add_constant_schedule_ruleset(model, value, name = nil) ⇒ Object
Create constant ScheduleRuleset
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2160 def model_add_constant_schedule_ruleset(model, value, name = nil) schedule = OpenStudio::Model::ScheduleRuleset.new(model) unless name.nil? schedule.setName(name) schedule.defaultDaySchedule.setName("#{name} Default") end schedule.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), value) return schedule end |
#model_add_construction(model, construction_name, construction_props = nil) ⇒ Object
make return an OptionalConstruction
Create a construction from the openstudio standards dataset. If construction_props are specified, modifies the insulation layer accordingly.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2388 def model_add_construction(model, construction_name, construction_props = nil) # First check model and return construction if it already exists model.getConstructions.sort.each do |construction| if construction.name.get.to_s == construction_name OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "Already added construction: #{construction_name}") return construction end end OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "Adding construction: #{construction_name}") # Get the object data data = model_find_object(standards_data['constructions'], 'name' => construction_name) unless data OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Model', "Cannot find data for construction: #{construction_name}, will not be created.") return OpenStudio::Model::OptionalConstruction.new end # Make a new construction and set the standards details construction = OpenStudio::Model::Construction.new(model) construction.setName(construction_name) standards_info = construction.standardsInformation intended_surface_type = data['intended_surface_type'] intended_surface_type ||= '' standards_info.setIntendedSurfaceType(intended_surface_type) standards_construction_type = data['standards_construction_type'] standards_construction_type ||= '' standards_info.setStandardsConstructionType(standards_construction_type) # TODO: could put construction rendering color in the spreadsheet # Add the material layers to the construction layers = OpenStudio::Model::MaterialVector.new data['materials'].each do |material_name| material = model_add_material(model, material_name) if material layers << material end end construction.setLayers(layers) # Modify the R value of the insulation to hit the specified U-value, C-Factor, or F-Factor. # Doesn't currently operate on glazing constructions if construction_props # Determine the target U-value, C-factor, and F-factor target_u_value_ip = construction_props['assembly_maximum_u_value'] target_f_factor_ip = construction_props['assembly_maximum_f_factor'] target_c_factor_ip = construction_props['assembly_maximum_c_factor'] target_shgc = construction_props['assembly_maximum_solar_heat_gain_coefficient'] u_includes_int_film = construction_props['u_value_includes_interior_film_coefficient'] u_includes_ext_film = construction_props['u_value_includes_exterior_film_coefficient'] OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "#{data['intended_surface_type']} u_val #{target_u_value_ip} f_fac #{target_f_factor_ip} c_fac #{target_c_factor_ip}") if target_u_value_ip # Handle Opaque and Fenestration Constructions differently if construction.isFenestration && construction_simple_glazing?(construction) # Set the U-Value and SHGC construction_set_glazing_u_value(construction, target_u_value_ip.to_f, data['intended_surface_type'], u_includes_int_film, u_includes_ext_film) construction_set_glazing_shgc(construction, target_shgc.to_f) else # if !data['intended_surface_type'] == 'ExteriorWindow' && !data['intended_surface_type'] == 'Skylight' # Set the U-Value construction_set_u_value(construction, target_u_value_ip.to_f, data['insulation_layer'], data['intended_surface_type'], u_includes_int_film, u_includes_ext_film) # else # OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "Not modifying U-value for #{data['intended_surface_type']} u_val #{target_u_value_ip} f_fac #{target_f_factor_ip} c_fac #{target_c_factor_ip}") end elsif target_f_factor_ip && data['intended_surface_type'] == 'GroundContactFloor' # Set the F-Factor (only applies to slabs on grade) # TODO figure out what the prototype buildings did about ground heat transfer # construction_set_slab_f_factor(construction, target_f_factor_ip.to_f, data['insulation_layer']) construction_set_u_value(construction, 0.0, data['insulation_layer'], data['intended_surface_type'], u_includes_int_film, u_includes_ext_film) elsif target_c_factor_ip && data['intended_surface_type'] == 'GroundContactWall' # Set the C-Factor (only applies to underground walls) # TODO figure out what the prototype buildings did about ground heat transfer # construction_set_underground_wall_c_factor(construction, target_c_factor_ip.to_f, data['insulation_layer']) construction_set_u_value(construction, 0.0, data['insulation_layer'], data['intended_surface_type'], u_includes_int_film, u_includes_ext_film) end end # # Check if the construction with the modified name was already in the model. # # If it was, delete this new construction and return the copy already in the model. # m = construction.name.get.to_s.match(/\s(\d+)/) # if m # revised_cons_name = construction.name.get.to_s.gsub(/\s\d+/,'') # model.getConstructions.sort.each do |exist_construction| # if exist_construction.name.get.to_s == revised_cons_name # OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "Already added construction: #{construction_name}") # # Remove the recently added construction # lyrs = construction.layers # # Erase the layers in the construction # construction.setLayers([]) # # Delete unused materials # lyrs.uniq.each do |lyr| # if lyr.directUseCount.zero? # OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Model', "Removing Material: #{lyr.name}") # lyr.remove # end # end # construction.remove # Remove the construction # return exist_construction # end # end # end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "Adding construction #{construction.name}.") return construction end |
#model_add_construction_set(model, clim, building_type, spc_type, is_residential) ⇒ Object
Create a construction set from the openstudio standards dataset. Returns an Optional DefaultConstructionSet
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2547 def model_add_construction_set(model, clim, building_type, spc_type, is_residential) construction_set = OpenStudio::Model::OptionalDefaultConstructionSet.new # Find the climate zone set that this climate zone falls into climate_zone_set = model_find_climate_zone_set(model, clim) unless climate_zone_set return construction_set end # Get the object data data = model_find_object(standards_data['construction_sets'], 'template' => template, 'climate_zone_set' => climate_zone_set, 'building_type' => building_type, 'space_type' => spc_type, 'is_residential' => is_residential) unless data data = model_find_object(standards_data['construction_sets'], 'template' => template, 'climate_zone_set' => climate_zone_set, 'building_type' => building_type, 'space_type' => spc_type) unless data # if nothing matches say that we could not find it. OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Construction set for template =#{template}, climate zone set =#{climate_zone_set}, building type = #{building_type}, space type = #{spc_type}, is residential = #{is_residential} was not found in standards_data['construction_sets']") return construction_set end end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "Adding construction set: #{template}-#{clim}-#{building_type}-#{spc_type}-is_residential#{is_residential}") name = model_make_name(model, clim, building_type, spc_type) # Create a new construction set and name it construction_set = OpenStudio::Model::DefaultConstructionSet.new(model) construction_set.setName(name) # Exterior surfaces constructions exterior_surfaces = OpenStudio::Model::DefaultSurfaceConstructions.new(model) construction_set.setDefaultExteriorSurfaceConstructions(exterior_surfaces) if data['exterior_floor_standards_construction_type'] && data['exterior_floor_building_category'] exterior_surfaces.setFloorConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorFloor', data['exterior_floor_standards_construction_type'], data['exterior_floor_building_category'])) end if data['exterior_wall_standards_construction_type'] && data['exterior_wall_building_category'] exterior_surfaces.setWallConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorWall', data['exterior_wall_standards_construction_type'], data['exterior_wall_building_category'])) end if data['exterior_roof_standards_construction_type'] && data['exterior_roof_building_category'] exterior_surfaces.setRoofCeilingConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorRoof', data['exterior_roof_standards_construction_type'], data['exterior_roof_building_category'])) end # Interior surfaces constructions interior_surfaces = OpenStudio::Model::DefaultSurfaceConstructions.new(model) construction_set.setDefaultInteriorSurfaceConstructions(interior_surfaces) construction_name = data['interior_floors'] unless construction_name.nil? interior_surfaces.setFloorConstruction(model_add_construction(model, construction_name)) end construction_name = data['interior_walls'] unless construction_name.nil? interior_surfaces.setWallConstruction(model_add_construction(model, construction_name)) end construction_name = data['interior_ceilings'] unless construction_name.nil? interior_surfaces.setRoofCeilingConstruction(model_add_construction(model, construction_name)) end # Ground contact surfaces constructions ground_surfaces = OpenStudio::Model::DefaultSurfaceConstructions.new(model) construction_set.setDefaultGroundContactSurfaceConstructions(ground_surfaces) if data['ground_contact_floor_standards_construction_type'] && data['ground_contact_floor_building_category'] ground_surfaces.setFloorConstruction(model_find_and_add_construction(model, climate_zone_set, 'GroundContactFloor', data['ground_contact_floor_standards_construction_type'], data['ground_contact_floor_building_category'])) end if data['ground_contact_wall_standards_construction_type'] && data['ground_contact_wall_building_category'] ground_surfaces.setWallConstruction(model_find_and_add_construction(model, climate_zone_set, 'GroundContactWall', data['ground_contact_wall_standards_construction_type'], data['ground_contact_wall_building_category'])) end if data['ground_contact_ceiling_standards_construction_type'] && data['ground_contact_ceiling_building_category'] ground_surfaces.setRoofCeilingConstruction(model_find_and_add_construction(model, climate_zone_set, 'GroundContactRoof', data['ground_contact_ceiling_standards_construction_type'], data['ground_contact_ceiling_building_category'])) end # Exterior sub surfaces constructions exterior_subsurfaces = OpenStudio::Model::DefaultSubSurfaceConstructions.new(model) construction_set.setDefaultExteriorSubSurfaceConstructions(exterior_subsurfaces) if data['exterior_fixed_window_standards_construction_type'] && data['exterior_fixed_window_building_category'] exterior_subsurfaces.setFixedWindowConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorWindow', data['exterior_fixed_window_standards_construction_type'], data['exterior_fixed_window_building_category'])) end if data['exterior_operable_window_standards_construction_type'] && data['exterior_operable_window_building_category'] exterior_subsurfaces.setOperableWindowConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorWindow', data['exterior_operable_window_standards_construction_type'], data['exterior_operable_window_building_category'])) end if data['exterior_door_standards_construction_type'] && data['exterior_door_building_category'] exterior_subsurfaces.setDoorConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorDoor', data['exterior_door_standards_construction_type'], data['exterior_door_building_category'])) end construction_name = data['exterior_glass_doors'] unless construction_name.nil? exterior_subsurfaces.setGlassDoorConstruction(model_add_construction(model, construction_name)) end if data['exterior_overhead_door_standards_construction_type'] && data['exterior_overhead_door_building_category'] exterior_subsurfaces.setOverheadDoorConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorDoor', data['exterior_overhead_door_standards_construction_type'], data['exterior_overhead_door_building_category'])) end if data['exterior_skylight_standards_construction_type'] && data['exterior_skylight_building_category'] exterior_subsurfaces.setSkylightConstruction(model_find_and_add_construction(model, climate_zone_set, 'Skylight', data['exterior_skylight_standards_construction_type'], data['exterior_skylight_building_category'])) end if (construction_name = data['tubular_daylight_domes']) exterior_subsurfaces.setTubularDaylightDomeConstruction(model_add_construction(model, construction_name)) end if (construction_name = data['tubular_daylight_diffusers']) exterior_subsurfaces.setTubularDaylightDiffuserConstruction(model_add_construction(model, construction_name)) end # Interior sub surfaces constructions interior_subsurfaces = OpenStudio::Model::DefaultSubSurfaceConstructions.new(model) construction_set.setDefaultInteriorSubSurfaceConstructions(interior_subsurfaces) if (construction_name = data['interior_fixed_windows']) interior_subsurfaces.setFixedWindowConstruction(model_add_construction(model, construction_name)) end if (construction_name = data['interior_operable_windows']) interior_subsurfaces.setOperableWindowConstruction(model_add_construction(model, construction_name)) end if (construction_name = data['interior_doors']) interior_subsurfaces.setDoorConstruction(model_add_construction(model, construction_name)) end # Other constructions if (construction_name = data['interior_partitions']) construction_set.setInteriorPartitionConstruction(model_add_construction(model, construction_name)) end if (construction_name = data['space_shading']) construction_set.setSpaceShadingConstruction(model_add_construction(model, construction_name)) end if (construction_name = data['building_shading']) construction_set.setBuildingShadingConstruction(model_add_construction(model, construction_name)) end if (construction_name = data['site_shading']) construction_set.setSiteShadingConstruction(model_add_construction(model, construction_name)) end # componentize the construction set # construction_set_component = construction_set.createComponent # Return the construction set return OpenStudio::Model::OptionalDefaultConstructionSet.new(construction_set) end |
#model_add_curve(model, curve_name) ⇒ Object
Adds a curve from the OpenStudio-Standards dataset to the model based on the curve name.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2728 def model_add_curve(model, curve_name) # First check model and return curve if it already exists existing_curves = [] existing_curves += model.getCurveLinears existing_curves += model.getCurveCubics existing_curves += model.getCurveQuadratics existing_curves += model.getCurveBicubics existing_curves += model.getCurveBiquadratics existing_curves.sort.each do |curve| if curve.name.get.to_s == curve_name OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "Already added curve: #{curve_name}") return curve end end # OpenStudio::logFree(OpenStudio::Info, "openstudio.prototype.addCurve", "Adding curve '#{curve_name}' to the model.") # Find curve data data = model_find_object(standards_data['curves'], 'name' => curve_name) if data.nil? OpenStudio::logFree(OpenStudio::Warn, "openstudio.Model.Model", "Could not find a curve called '#{curve_name}' in the standards.") return nil end # Make the correct type of curve case data['form'] when 'Linear' curve = OpenStudio::Model::CurveLinear.new(model) curve.setName(data['name']) curve.setCoefficient1Constant(data['coeff_1']) curve.setCoefficient2x(data['coeff_2']) curve.setMinimumValueofx(data['minimum_independent_variable_1']) if data['minimum_independent_variable_1'] curve.setMaximumValueofx(data['maximum_independent_variable_1']) if data['maximum_independent_variable_1'] curve.setMinimumCurveOutput(data['minimum_dependent_variable_output']) if data['minimum_dependent_variable_output'] curve.setMaximumCurveOutput(data['maximum_dependent_variable_output']) if data['maximum_dependent_variable_output'] return curve when 'Cubic' curve = OpenStudio::Model::CurveCubic.new(model) curve.setName(data['name']) curve.setCoefficient1Constant(data['coeff_1']) curve.setCoefficient2x(data['coeff_2']) curve.setCoefficient3xPOW2(data['coeff_3']) curve.setCoefficient4xPOW3(data['coeff_4']) curve.setMinimumValueofx(data['minimum_independent_variable_1']) if data['minimum_independent_variable_1'] curve.setMaximumValueofx(data['maximum_independent_variable_1']) if data['maximum_independent_variable_1'] curve.setMinimumCurveOutput(data['minimum_dependent_variable_output']) if data['minimum_dependent_variable_output'] curve.setMaximumCurveOutput(data['maximum_dependent_variable_output']) if data['maximum_dependent_variable_output'] return curve when 'Quadratic' curve = OpenStudio::Model::CurveQuadratic.new(model) curve.setName(data['name']) curve.setCoefficient1Constant(data['coeff_1']) curve.setCoefficient2x(data['coeff_2']) curve.setCoefficient3xPOW2(data['coeff_3']) curve.setMinimumValueofx(data['minimum_independent_variable_1']) if data['minimum_independent_variable_1'] curve.setMaximumValueofx(data['maximum_independent_variable_1']) if data['maximum_independent_variable_1'] curve.setMinimumCurveOutput(data['minimum_dependent_variable_output']) if data['minimum_dependent_variable_output'] curve.setMaximumCurveOutput(data['maximum_dependent_variable_output']) if data['maximum_dependent_variable_output'] return curve when 'BiCubic' curve = OpenStudio::Model::CurveBicubic.new(model) curve.setName(data['name']) curve.setCoefficient1Constant(data['coeff_1']) curve.setCoefficient2x(data['coeff_2']) curve.setCoefficient3xPOW2(data['coeff_3']) curve.setCoefficient4y(data['coeff_4']) curve.setCoefficient5yPOW2(data['coeff_5']) curve.setCoefficient6xTIMESY(data['coeff_6']) curve.setCoefficient7xPOW3(data['coeff_7']) curve.setCoefficient8yPOW3(data['coeff_8']) curve.setCoefficient9xPOW2TIMESY(data['coeff_9']) curve.setCoefficient10xTIMESYPOW2(data['coeff_10']) curve.setMinimumValueofx(data['minimum_independent_variable_1']) if data['minimum_independent_variable_1'] curve.setMaximumValueofx(data['maximum_independent_variable_1']) if data['maximum_independent_variable_1'] curve.setMinimumValueofy(data['minimum_independent_variable_2']) if data['minimum_independent_variable_2'] curve.setMaximumValueofy(data['maximum_independent_variable_2']) if data['maximum_independent_variable_2'] curve.setMinimumCurveOutput(data['minimum_dependent_variable_output']) if data['minimum_dependent_variable_output'] curve.setMaximumCurveOutput(data['maximum_dependent_variable_output']) if data['maximum_dependent_variable_output'] return curve when 'BiQuadratic' curve = OpenStudio::Model::CurveBiquadratic.new(model) curve.setName(data['name']) curve.setCoefficient1Constant(data['coeff_1']) curve.setCoefficient2x(data['coeff_2']) curve.setCoefficient3xPOW2(data['coeff_3']) curve.setCoefficient4y(data['coeff_4']) curve.setCoefficient5yPOW2(data['coeff_5']) curve.setCoefficient6xTIMESY(data['coeff_6']) curve.setMinimumValueofx(data['minimum_independent_variable_1']) if data['minimum_independent_variable_1'] curve.setMaximumValueofx(data['maximum_independent_variable_1']) if data['maximum_independent_variable_1'] curve.setMinimumValueofy(data['minimum_independent_variable_2']) if data['minimum_independent_variable_2'] curve.setMaximumValueofy(data['maximum_independent_variable_2']) if data['maximum_independent_variable_2'] curve.setMinimumCurveOutput(data['minimum_dependent_variable_output']) if data['minimum_dependent_variable_output'] curve.setMaximumCurveOutput(data['maximum_dependent_variable_output']) if data['maximum_dependent_variable_output'] return curve when 'BiLinear' curve = OpenStudio::Model::CurveBiquadratic.new(model) curve.setName(data['name']) curve.setCoefficient1Constant(data['coeff_1']) curve.setCoefficient2x(data['coeff_2']) curve.setCoefficient4y(data['coeff_3']) curve.setMinimumValueofx(data['minimum_independent_variable_1']) if data['minimum_independent_variable_1'] curve.setMaximumValueofx(data['maximum_independent_variable_1']) if data['maximum_independent_variable_1'] curve.setMinimumValueofy(data['minimum_independent_variable_2']) if data['minimum_independent_variable_2'] curve.setMaximumValueofy(data['maximum_independent_variable_2']) if data['maximum_independent_variable_2'] curve.setMinimumCurveOutput(data['minimum_dependent_variable_output']) if data['minimum_dependent_variable_output'] curve.setMaximumCurveOutput(data['maximum_dependent_variable_output']) if data['maximum_dependent_variable_output'] return curve else OpenStudio::logFree(OpenStudio::Error, "openstudio.Model.Model", "#{curve_name}' has an invalid form: #{data['form']}', cannot create this curve.") return nil end end |
#model_add_cw_loop(model, cooling_tower_type, cooling_tower_fan_type, cooling_tower_capacity_control, number_of_cells_per_tower, number_cooling_towers = 1, building_type = nil) ⇒ OpenStudio::Model::PlantLoop
Creates a condenser water loop and adds it to the model.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 291 def model_add_cw_loop(model, cooling_tower_type, cooling_tower_fan_type, cooling_tower_capacity_control, number_of_cells_per_tower, number_cooling_towers = 1, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', 'Adding condenser water loop.') # Condenser water loop condenser_water_loop = OpenStudio::Model::PlantLoop.new(model) condenser_water_loop.setName('Condenser Water Loop') condenser_water_loop.setMaximumLoopTemperature(80) condenser_water_loop.setMinimumLoopTemperature(5) # Condenser water loop controls cw_temp_f = 70 # CW setpoint 70F cw_temp_sizing_f = 85 # CW sized to deliver 85F cw_delta_t_r = 10 # 10F delta-T cw_approach_delta_t_r = 7 # 7F approach cw_temp_c = OpenStudio.convert(cw_temp_f, 'F', 'C').get cw_temp_sizing_c = OpenStudio.convert(cw_temp_sizing_f, 'F', 'C').get cw_delta_t_k = OpenStudio.convert(cw_delta_t_r, 'R', 'K').get cw_approach_delta_t_k = OpenStudio.convert(cw_approach_delta_t_r, 'R', 'K').get cw_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) cw_temp_sch.setName("Condenser Water Loop Temp - #{cw_temp_f}F") cw_temp_sch.defaultDaySchedule.setName("Condenser Water Loop Temp - #{cw_temp_f}F Default") cw_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), cw_temp_c) cw_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, cw_temp_sch) cw_stpt_manager.addToNode(condenser_water_loop.supplyOutletNode) sizing_plant = condenser_water_loop.sizingPlant sizing_plant.setLoopType('Condenser') sizing_plant.setDesignLoopExitTemperature(cw_temp_sizing_c) sizing_plant.setLoopDesignTemperatureDifference(cw_delta_t_k) # Condenser water pump #TODO make this into a HeaderedPump:VariableSpeed cw_pump = OpenStudio::Model::PumpConstantSpeed.new(model) cw_pump.setName('Condenser Water Loop Pump') cw_pump_head_ft_h2o = 49.7 cw_pump_head_press_pa = OpenStudio.convert(cw_pump_head_ft_h2o, 'ftH_{2}O', 'Pa').get cw_pump.setRatedPumpHead(cw_pump_head_press_pa) cw_pump.setPumpControlType('Intermittent') cw_pump.addToNode(condenser_water_loop.supplyInletNode) # Cooling towers # Per PNNL PRM Reference Manual number_cooling_towers.times do |_i| sizing_factor = 1 / number_cooling_towers twr_name = "#{cooling_tower_fan_type} #{cooling_tower_capacity_control} #{cooling_tower_type}" # Tower object depends on the control type cooling_tower = nil case cooling_tower_capacity_control when 'Fluid Bypass', 'Fan Cycling' cooling_tower = OpenStudio::Model::CoolingTowerSingleSpeed.new(model) if cooling_tower_capacity_control == 'Fluid Bypass' cooling_tower.setCellControl('FluidBypass') else cooling_tower.setCellControl('FanCycling') end when 'TwoSpeed Fan' cooling_tower = OpenStudio::Model::CoolingTowerTwoSpeed.new(model) # TODO: expose newer cooling tower sizing fields in API # cooling_tower.setLowFanSpeedAirFlowRateSizingFactor(0.5) # cooling_tower.setLowFanSpeedFanPowerSizingFactor(0.3) # cooling_tower.setLowFanSpeedUFactorTimesAreaSizingFactor # cooling_tower.setLowSpeedNominalCapacitySizingFactor when 'Variable Speed Fan' cooling_tower = OpenStudio::Model::CoolingTowerVariableSpeed.new(model) cooling_tower.setDesignApproachTemperature(cw_approach_delta_t_k) cooling_tower.setDesignRangeTemperature(cw_delta_t_k) cooling_tower.(0.125) twr_fan_curve = model_add_curve(model, 'VSD-TWR-FAN-FPLR') cooling_tower.setFanPowerRatioFunctionofAirFlowRateRatioCurve(twr_fan_curve) else OpenStudio.logFree(OpenStudio::Error, 'openstudio.Model.Model', "#{cooling_tower_capacity_control} is not a valid choice of cooling tower capacity control. Valid choices are Fluid Bypass, Fan Cycling, TwoSpeed Fan, Variable Speed Fan.") end # Set the properties that apply to all tower types # and attach to the condenser loop. unless cooling_tower.nil? cooling_tower.setName(twr_name) cooling_tower.setSizingFactor(sizing_factor) cooling_tower.setNumberofCells(number_of_cells_per_tower) condenser_water_loop.addSupplyBranchForComponent(cooling_tower) end end # Condenser water loop pipes cooling_tower_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) condenser_water_loop.addSupplyBranchForComponent(cooling_tower_bypass_pipe) chiller_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) condenser_water_loop.addDemandBranchForComponent(chiller_bypass_pipe) supply_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) supply_outlet_pipe.addToNode(condenser_water_loop.supplyOutletNode) demand_inlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_inlet_pipe.addToNode(condenser_water_loop.demandInletNode) demand_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_outlet_pipe.addToNode(condenser_water_loop.demandOutletNode) return condenser_water_loop end |
#model_add_data_center_hvac(model, sys_name, hot_water_loop, heat_pump_loop, thermal_zones, hvac_op_sch, oa_damper_sch, main_data_center = false) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Creates a data center PSZ-AC system for each zone.
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open center in the building.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 2555 def model_add_data_center_hvac(model, sys_name, hot_water_loop, heat_pump_loop, thermal_zones, hvac_op_sch, oa_damper_sch, main_data_center = false) thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding data center HVAC for #{zone.name}.") end hw_temp_f = 180 # HW setpoint 180F hw_delta_t_r = 20 # 20F delta-T hw_temp_c = OpenStudio.convert(hw_temp_f, 'F', 'C').get hw_delta_t_k = OpenStudio.convert(hw_delta_t_r, 'R', 'K').get # control temps used across all air handlers clg_sa_temp_f = 55 # Central deck clg temp 55F prehtg_sa_temp_f = 44.6 # Preheat to 44.6F htg_sa_temp_f = 55 # Central deck htg temp 55F rht_sa_temp_f = 104 # VAV box reheat to 104F clg_sa_temp_c = OpenStudio.convert(clg_sa_temp_f, 'F', 'C').get prehtg_sa_temp_c = OpenStudio.convert(prehtg_sa_temp_f, 'F', 'C').get htg_sa_temp_c = OpenStudio.convert(htg_sa_temp_f, 'F', 'C').get rht_sa_temp_c = OpenStudio.convert(rht_sa_temp_f, 'F', 'C').get # hvac operation schedule hvac_op_sch = if hvac_op_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, hvac_op_sch) end # oa damper schedule oa_damper_sch = if oa_damper_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, oa_damper_sch) end # Make a PSZ-AC for each zone air_loops = [] thermal_zones.each do |zone| air_loop = OpenStudio::Model::AirLoopHVAC.new(model) if sys_name.nil? air_loop.setName("#{zone.name} PSZ-AC Data Center") else air_loop.setName("#{zone.name} #{sys_name}") end air_loops << air_loop air_loop.setAvailabilitySchedule(hvac_op_sch) # When an air_loop is contructed, its constructor creates a sizing:system object # the default sizing:system contstructor makes a system:sizing object # appropriate for a multizone VAV system # this systems is a constant volume system with no VAV terminals, # and therfore needs different default settings air_loop_sizing = air_loop.sizingSystem # TODO units air_loop_sizing.setTypeofLoadtoSizeOn('Sensible') air_loop_sizing.autosizeDesignOutdoorAirFlowRate air_loop_sizing.setMinimumSystemAirFlowRatio(1.0) air_loop_sizing.setPreheatDesignTemperature(7.0) air_loop_sizing.setPreheatDesignHumidityRatio(0.008) air_loop_sizing.setPrecoolDesignTemperature(12.8) air_loop_sizing.setPrecoolDesignHumidityRatio(0.008) air_loop_sizing.setCentralCoolingDesignSupplyAirTemperature(12.8) air_loop_sizing.setCentralHeatingDesignSupplyAirTemperature(40.0) air_loop_sizing.setSizingOption('Coincident') air_loop_sizing.setAllOutdoorAirinCooling(false) air_loop_sizing.setAllOutdoorAirinHeating(false) air_loop_sizing.setCentralCoolingDesignSupplyAirHumidityRatio(0.0085) air_loop_sizing.setCentralHeatingDesignSupplyAirHumidityRatio(0.0080) air_loop_sizing.setCoolingDesignAirFlowMethod('DesignDay') air_loop_sizing.setCoolingDesignAirFlowRate(0.0) air_loop_sizing.setHeatingDesignAirFlowMethod('DesignDay') air_loop_sizing.setHeatingDesignAirFlowRate(0.0) air_loop_sizing.setSystemOutdoorAirMethod('ZoneSum') # Zone sizing sizing_zone = zone.sizingZone sizing_zone.setZoneCoolingDesignSupplyAirTemperature(12.8) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(40.0) # Add a setpoint manager single zone reheat to control the # supply air temperature based on the needs of this zone setpoint_mgr_single_zone_reheat = OpenStudio::Model::SetpointManagerSingleZoneReheat.new(model) setpoint_mgr_single_zone_reheat.setControlZone(zone) fan = OpenStudio::Model::FanOnOff.new(model, hvac_op_sch) # Set fan op sch manually since fwd translator doesn't fan.setName("#{air_loop.name} Fan") fan_static_pressure_in_h2o = 2.5 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan.setPressureRise(fan_static_pressure_pa) fan.setFanEfficiency(0.54) fan.setMotorEfficiency(0.90) htg_coil = OpenStudio::Model::CoilHeatingWaterToAirHeatPumpEquationFit.new(model) htg_coil.setName("#{air_loop.name} Water-to-Air HP Htg Coil") htg_coil.setRatedHeatingCoefficientofPerformance(4.2) # TODO: add this to standards htg_coil.setHeatingCapacityCoefficient1(0.237847462869254) htg_coil.setHeatingCapacityCoefficient2(-3.35823796081626) htg_coil.setHeatingCapacityCoefficient3(3.80640467406376) htg_coil.setHeatingCapacityCoefficient4(0.179200417311554) htg_coil.setHeatingCapacityCoefficient5(0.12860719846082) htg_coil.setHeatingPowerConsumptionCoefficient1(-3.79175529243238) htg_coil.setHeatingPowerConsumptionCoefficient2(3.38799239505527) htg_coil.setHeatingPowerConsumptionCoefficient3(1.5022612076303) htg_coil.setHeatingPowerConsumptionCoefficient4(-0.177653510577989) htg_coil.setHeatingPowerConsumptionCoefficient5(-0.103079864171839) heat_pump_loop.addDemandBranchForComponent(htg_coil) clg_coil = OpenStudio::Model::CoilCoolingWaterToAirHeatPumpEquationFit.new(model) clg_coil.setName("#{air_loop.name} Water-to-Air HP Clg Coil") clg_coil.setRatedCoolingCoefficientofPerformance(3.4) # TODO: add this to standards clg_coil.setTotalCoolingCapacityCoefficient1(-4.30266987344639) clg_coil.setTotalCoolingCapacityCoefficient2(7.18536990534372) clg_coil.setTotalCoolingCapacityCoefficient3(-2.23946714486189) clg_coil.setTotalCoolingCapacityCoefficient4(0.139995928440879) clg_coil.setTotalCoolingCapacityCoefficient5(0.102660179888915) clg_coil.setSensibleCoolingCapacityCoefficient1(6.0019444814887) clg_coil.setSensibleCoolingCapacityCoefficient2(22.6300677244073) clg_coil.setSensibleCoolingCapacityCoefficient3(-26.7960783730934) clg_coil.setSensibleCoolingCapacityCoefficient4(-1.72374720346819) clg_coil.setSensibleCoolingCapacityCoefficient5(0.490644802367817) clg_coil.setSensibleCoolingCapacityCoefficient6(0.0693119353468141) clg_coil.setCoolingPowerConsumptionCoefficient1(-5.67775976415698) clg_coil.setCoolingPowerConsumptionCoefficient2(0.438988156976704) clg_coil.setCoolingPowerConsumptionCoefficient3(5.845277342193) clg_coil.setCoolingPowerConsumptionCoefficient4(0.141605667000125) clg_coil.setCoolingPowerConsumptionCoefficient5(-0.168727936032429) heat_pump_loop.addDemandBranchForComponent(clg_coil) supplemental_htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) supplemental_htg_coil.setName("#{air_loop.name} Electric Backup Htg Coil") oa_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_controller.setName("#{air_loop.name} OA Sys Controller") oa_controller.setMinimumOutdoorAirSchedule(oa_damper_sch) oa_controller.autosizeMinimumOutdoorAirFlowRate oa_system = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_controller) oa_system.setName("#{air_loop.name} OA Sys") # Add the components to the air loop # in order from closest to zone to furthest from zone supply_inlet_node = air_loop.supplyInletNode if main_data_center humidifier = OpenStudio::Model::HumidifierSteamElectric.new(model) humidifier.setRatedCapacity(3.72E-5) humidifier.setRatedPower(100_000) humidifier.setName("#{air_loop.name} Electric Steam Humidifier") extra_elec_htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) extra_elec_htg_coil.setName("#{air_loop.name} Electric Htg Coil") extra_water_htg_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) extra_water_htg_coil.setName("#{air_loop.name} Water Htg Coil") extra_water_htg_coil.setRatedInletWaterTemperature(hw_temp_c) extra_water_htg_coil.setRatedInletAirTemperature(prehtg_sa_temp_c) extra_water_htg_coil.setRatedOutletWaterTemperature(hw_temp_c - hw_delta_t_k) extra_water_htg_coil.setRatedOutletAirTemperature(htg_sa_temp_c) hot_water_loop.addDemandBranchForComponent(extra_water_htg_coil) extra_water_htg_coil.addToNode(supply_inlet_node) extra_elec_htg_coil.addToNode(supply_inlet_node) humidifier.addToNode(supply_inlet_node) humidity_spm = OpenStudio::Model::SetpointManagerSingleZoneHumidityMinimum.new(model) humidity_spm.setControlZone(zone) humidity_spm.addToNode(humidifier.outletModelObject.get.to_Node.get) humidistat = OpenStudio::Model::ZoneControlHumidistat.new(model) humidistat.(model_add_schedule(model, 'OfficeLarge DC_MinRelHumSetSch')) zone.setZoneControlHumidistat(humidistat) end unitary_system = OpenStudio::Model::AirLoopHVACUnitarySystem.new(model) unitary_system.setSupplyFan(fan) unitary_system.setHeatingCoil(htg_coil) unitary_system.setCoolingCoil(clg_coil) unitary_system.setSupplementalHeatingCoil(supplemental_htg_coil) unitary_system.setName("#{zone.name} Unitary HP") unitary_system.setControllingZoneorThermostatLocation(zone) unitary_system.setMaximumOutdoorDryBulbTemperatureforSupplementalHeaterOperation(OpenStudio.convert(40, 'F', 'C').get) unitary_system.setFanPlacement('BlowThrough') unitary_system.(hvac_op_sch) unitary_system.(model.alwaysOnDiscreteSchedule) unitary_system.addToNode(supply_inlet_node) setpoint_mgr_single_zone_reheat.setMinimumSupplyAirTemperature(OpenStudio.convert(55, 'F', 'C').get) setpoint_mgr_single_zone_reheat.setMaximumSupplyAirTemperature(OpenStudio.convert(104, 'F', 'C').get) # Add the OA system oa_system.addToNode(supply_inlet_node) # Attach the nightcycle manager to the supply outlet node setpoint_mgr_single_zone_reheat.addToNode(air_loop.supplyOutletNode) air_loop.setNightCycleControlType('CycleOnAny') # Create a diffuser and attach the zone/diffuser pair to the air loop diffuser = OpenStudio::Model::AirTerminalSingleDuctUncontrolled.new(model, model.alwaysOnDiscreteSchedule) diffuser.setName("#{air_loop.name} Diffuser") air_loop.addBranchForZone(zone, diffuser.to_StraightComponent) end return air_loops end |
#model_add_data_center_load(model, space, dc_watts_per_area) ⇒ Bool
Adds a data center load to a given space.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 2527 def model_add_data_center_load(model, space, dc_watts_per_area) # Data center load data_center_definition = OpenStudio::Model::ElectricEquipmentDefinition.new(model) data_center_definition.setName('Data Center Load') data_center_definition.setWattsperSpaceFloorArea(dc_watts_per_area) data_center_equipment = OpenStudio::Model::ElectricEquipment.new(data_center_definition) data_center_equipment.setName('Data Center Load') data_center_sch = model.alwaysOnDiscreteSchedule data_center_equipment.setSchedule(data_center_sch) data_center_equipment.setSpace(space) return true end |
#model_add_daylighting_controls(model) ⇒ Object
Applies daylighting controls to each space in the model per the standard.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1872 def model_add_daylighting_controls(model) OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Started adding daylighting controls.') # Add daylighting controls to each space model.getSpaces.sort.each do |space| added = space_add_daylighting_controls(space, false, false) end OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Finished adding daylighting controls.') end |
#model_add_design_days_and_weather_file(model, climate_zone, epw_file) ⇒ Object
Helper method to set the weather file, import the design days, set water mains temperature, and set ground temperature. Based on ChangeBuildingLocation measure by Nicholas Long
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# File 'lib/openstudio-standards/weather/Weather.Model.rb', line 6 def model_add_design_days_and_weather_file(model, climate_zone, epw_file) success = true require_relative 'Weather.stat_file' # Remove any existing Design Day objects that are in the file model.getDesignDays.each(&:remove) OpenStudio.logFree(OpenStudio::Info, 'openstudio.weather.Model', "Started adding weather file for climate zone: #{climate_zone}.") # Define the weather file for each climate zone climate_zone_weather_file_map = { 'ASHRAE 169-2006-1A' => 'USA_FL_Miami.Intl.AP.722020_TMY3.epw', 'ASHRAE 169-2006-1B' => 'SAU_Riyadh.404380_IWEC.epw', 'ASHRAE 169-2006-2A' => 'USA_TX_Houston-Bush.Intercontinental.AP.722430_TMY3.epw', 'ASHRAE 169-2006-2B' => 'USA_AZ_Phoenix-Sky.Harbor.Intl.AP.722780_TMY3.epw', 'ASHRAE 169-2006-3A' => 'USA_TN_Memphis.Intl.AP.723340_TMY3.epw', 'ASHRAE 169-2006-3B' => 'USA_TX_El.Paso.Intl.AP.722700_TMY3.epw', 'ASHRAE 169-2006-3C' => 'USA_CA_San.Francisco.Intl.AP.724940_TMY3.epw', 'ASHRAE 169-2006-4A' => 'USA_MD_Baltimore-Washington.Intl.AP.724060_TMY3.epw', 'ASHRAE 169-2006-4B' => 'USA_NM_Albuquerque.Intl.AP.723650_TMY3.epw', 'ASHRAE 169-2006-4C' => 'USA_OR_Salem-McNary.Field.726940_TMY3.epw', 'ASHRAE 169-2006-5A' => 'USA_IL_Chicago-OHare.Intl.AP.725300_TMY3.epw', 'ASHRAE 169-2006-5B' => 'USA_ID_Boise.Air.Terminal.726810_TMY3.epw', 'ASHRAE 169-2006-5C' => 'CAN_BC_Vancouver.718920_CWEC.epw', 'ASHRAE 169-2006-6A' => 'USA_VT_Burlington.Intl.AP.726170_TMY3.epw', 'ASHRAE 169-2006-6B' => 'USA_MT_Helena.Rgnl.AP.727720_TMY3.epw', 'ASHRAE 169-2006-7A' => 'USA_MN_Duluth.Intl.AP.727450_TMY3.epw', 'ASHRAE 169-2006-7B' => 'USA_MN_Duluth.Intl.AP.727450_TMY3.epw', 'ASHRAE 169-2006-8A' => 'USA_AK_Fairbanks.Intl.AP.702610_TMY3.epw', 'ASHRAE 169-2006-8B' => 'USA_AK_Fairbanks.Intl.AP.702610_TMY3.epw', # For measure input 'NECB HDD Method' => epw_file.to_s, # For testing 'NECB-CNEB-5' => epw_file.to_s, 'NECB-CNEB-6' => epw_file.to_s, 'NECB-CNEB-7a' => epw_file.to_s, 'NECB-CNEB-7b' => epw_file.to_s, 'NECB-CNEB-8' => epw_file.to_s, # For DEER 'CEC T24-CEC1' => 'ARCATA_725945_CZ2010.epw', 'CEC T24-CEC2' => 'SANTA-ROSA_724957_CZ2010.epw', 'CEC T24-CEC3' => 'OAKLAND_724930_CZ2010.epw', 'CEC T24-CEC4' => 'SAN-JOSE-REID_724946_CZ2010.epw', 'CEC T24-CEC5' => 'SANTA-MARIA_723940_CZ2010.epw', 'CEC T24-CEC6' => 'TORRANCE_722955_CZ2010.epw', 'CEC T24-CEC7' => 'SAN-DIEGO-LINDBERGH_722900_CZ2010.epw', 'CEC T24-CEC8' => 'FULLERTON_722976_CZ2010.epw', 'CEC T24-CEC9' => 'BURBANK-GLENDALE_722880_CZ2010.epw', 'CEC T24-CEC10' => 'RIVERSIDE_722869_CZ2010.epw', 'CEC T24-CEC11' => 'RED-BLUFF_725910_CZ2010.epw', 'CEC T24-CEC12' => 'SACRAMENTO-EXECUTIVE_724830_CZ2010.epw', 'CEC T24-CEC13' => 'FRESNO_723890_CZ2010.epw', 'CEC T24-CEC14' => 'PALMDALE_723820_CZ2010.epw', 'CEC T24-CEC15' => 'PALM-SPRINGS-INTL_722868_CZ2010.epw', 'CEC T24-CEC16' => 'BLUE-CANYON_725845_CZ2010.epw' } # Get the weather file name from the hash weather_file_name = if epw_file.nil? || (epw_file.to_s.strip == '') climate_zone_weather_file_map[climate_zone] else epw_file.to_s end if weather_file_name.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.weather.Model', "Could not determine the weather file for climate zone: #{climate_zone}.") success = false end # Define where the weather files lives weather_dir = nil if __dir__[0] == ':' # Running from OpenStudio CLI # load weather file from embedded files epw_string = load_resource_relative("../../../data/weather/#{weather_file_name}") ddy_string = load_resource_relative("../../../data/weather/#{weather_file_name.gsub('.epw', '.ddy')}") stat_string = load_resource_relative("../../../data/weather/#{weather_file_name.gsub('.epw', '.stat')}") # extract to local weather dir weather_dir = File.(File.join(Dir.pwd, 'extracted_files/weather/')) puts "Extracting weather files to #{weather_dir}" FileUtils.mkdir_p(weather_dir) File.open("#{weather_dir}/#{weather_file_name}", 'wb') { |f| f << epw_string; f.flush } File.open("#{weather_dir}/#{weather_file_name.gsub('.epw', '.ddy')}", 'wb') { |f| f << ddy_string; f.flush } File.open("#{weather_dir}/#{weather_file_name.gsub('.epw', '.stat')}", 'wb') { |f| f << stat_string; f.flush } else # loaded gem from system path top_dir = File.('../../..', File.dirname(__FILE__)) weather_dir = File.("#{top_dir}/data/weather") end # Add Weather File unless (Pathname.new weather_dir).absolute? weather_dir = File.(File.join(File.dirname(__FILE__), weather_dir)) end weather_file = File.join(weather_dir, weather_file_name) epw_file = OpenStudio::EpwFile.new(weather_file) OpenStudio::Model::WeatherFile.setWeatherFile(model, epw_file).get weather_name = "#{epw_file.city}_#{epw_file.stateProvinceRegion}_#{epw_file.country}" weather_lat = epw_file.latitude weather_lon = epw_file.longitude weather_time = epw_file.timeZone weather_elev = epw_file.elevation # Add or update site data site = model.getSite site.setName(weather_name) site.setLatitude(weather_lat) site.setLongitude(weather_lon) site.setTimeZone(weather_time) site.setElevation(weather_elev) # Add SiteWaterMainsTemperature -- via parsing of STAT file. stat_filename = "#{File.join(File.dirname(weather_file), File.basename(weather_file, '.*'))}.stat" if File.exist? stat_filename stat_file = EnergyPlus::StatFile.new(stat_filename) water_temp = model.getSiteWaterMainsTemperature water_temp.setAnnualAverageOutdoorAirTemperature(stat_file.mean_dry_bulb) water_temp.setMaximumDifferenceInMonthlyAverageOutdoorAirTemperatures(stat_file.delta_dry_bulb) # OpenStudio::logFree(OpenStudio::Info, "openstudio.weather.Model", "Mean dry bulb is #{stat_file.mean_dry_bulb}") # OpenStudio::logFree(OpenStudio::Info, "openstudio.weather.Model", "Delta dry bulb is #{stat_file.delta_dry_bulb}") else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.weather.Model', "Could not find .stat file for weather, will use default water mains temperatures which may be inaccurate for the location.") success = false end # Load in the ddy file based on convention that it is in # the same directory and has the same basename as the epw file. ddy_file = "#{File.join(File.dirname(weather_file), File.basename(weather_file, '.*'))}.ddy" if File.exist? ddy_file ddy_model = OpenStudio::EnergyPlus.loadAndTranslateIdf(ddy_file).get ddy_model.getObjectsByType('OS:SizingPeriod:DesignDay'.to_IddObjectType).each do |d| # Import the 99.6% Heating and 0.4% Cooling design days ddy_list = /(Htg 99.6. Condns DB)|(Clg .4% Condns DB=>MWB)/ if d.name.get =~ ddy_list model.addObject(d.clone) # OpenStudio::logFree(OpenStudio::Info, 'openstudio.weather.Model', "Added #{d.name} design day.") end end # Check to ensure that some design days were added if model.getDesignDays.size.zero? OpenStudio.logFree(OpenStudio::Error, 'openstudio.weather.Model', "No design days were loaded, check syntax of .ddy file: #{ddy_file}.") end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.weather.Model', "Could not find .ddy file for: #{ddy_file}.") puts "Could not find .ddy file for: #{ddy_file}." success = false end return success end |
#model_add_district_ambient_loop(model) ⇒ OpenStudio::Model::PlantLoop
handle ground and heat pump with this; make heating/cooling source options (boiler, fluid cooler, district)
Adds an ambient condenser water loop that will be used in a district to connect buildings as a shared sink/source for heat pumps.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 624 def model_add_district_ambient_loop(model) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', 'Adding district ambient loop.') # Ambient loop loop = OpenStudio::Model::PlantLoop.new(model) loop.setName('Ambient Loop') loop.setMaximumLoopTemperature(80) loop.setMinimumLoopTemperature(5) # Ambient loop controls amb_high_temp_f = 90 # Supplemental cooling below 65F amb_low_temp_f = 41 # Supplemental heat below 41F amb_temp_sizing_f = 102.2 # CW sized to deliver 102.2F amb_delta_t_r = 19.8 # 19.8F delta-T amb_high_temp_c = OpenStudio.convert(amb_high_temp_f, 'F', 'C').get amb_low_temp_c = OpenStudio.convert(amb_low_temp_f, 'F', 'C').get amb_temp_sizing_c = OpenStudio.convert(amb_temp_sizing_f, 'F', 'C').get amb_delta_t_k = OpenStudio.convert(amb_delta_t_r, 'R', 'K').get amb_high_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) amb_high_temp_sch.setName("Ambient Loop High Temp - #{amb_high_temp_f}F") amb_high_temp_sch.defaultDaySchedule.setName("Ambient Loop High Temp - #{amb_high_temp_f}F Default") amb_high_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), amb_high_temp_c) amb_low_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) amb_low_temp_sch.setName("Ambient Loop Low Temp - #{amb_low_temp_f}F") amb_low_temp_sch.defaultDaySchedule.setName("Ambient Loop Low Temp - #{amb_low_temp_f}F Default") amb_low_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), amb_low_temp_c) amb_stpt_manager = OpenStudio::Model::SetpointManagerScheduledDualSetpoint.new(model) amb_stpt_manager.setHighSetpointSchedule(amb_high_temp_sch) amb_stpt_manager.setLowSetpointSchedule(amb_low_temp_sch) amb_stpt_manager.addToNode(loop.supplyOutletNode) sizing_plant = loop.sizingPlant sizing_plant.setLoopType('Heating') sizing_plant.setDesignLoopExitTemperature(amb_temp_sizing_c) sizing_plant.setLoopDesignTemperatureDifference(amb_delta_t_k) # Ambient loop pump amb_pump = OpenStudio::Model::PumpVariableSpeed.new(model) amb_pump.setName('Ambient Loop Pump') amb_pump_head_ft_h2o = 60 amb_pump_head_press_pa = OpenStudio.convert(amb_pump_head_ft_h2o, 'ftH_{2}O', 'Pa').get amb_pump.setRatedPumpHead(amb_pump_head_press_pa) amb_pump.setPumpControlType('Intermittent') amb_pump.addToNode(loop.supplyInletNode) # Cooling district_cooling = OpenStudio::Model::DistrictCooling.new(model) district_cooling.setNominalCapacity(1_000_000_000_000) # large number; no autosizing loop.addSupplyBranchForComponent(district_cooling) # Heating district_heating = OpenStudio::Model::DistrictHeating.new(model) district_heating.setNominalCapacity(1_000_000_000_000) # large number; no autosizing loop.addSupplyBranchForComponent(district_heating) # Ambient water loop pipes supply_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) supply_bypass_pipe.setName("#{loop.name} Supply Bypass") loop.addSupplyBranchForComponent(supply_bypass_pipe) demand_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_bypass_pipe.setName("#{loop.name} Demand Bypass") loop.addDemandBranchForComponent(demand_bypass_pipe) supply_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) supply_outlet_pipe.setName("#{loop.name} Supply Outlet") supply_outlet_pipe.addToNode(loop.supplyOutletNode) demand_inlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_inlet_pipe.setName("#{loop.name} Demand Inlet") demand_inlet_pipe.addToNode(loop.demandInletNode) demand_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_outlet_pipe.setName("#{loop.name} Demand Outlet") demand_outlet_pipe.addToNode(loop.demandOutletNode) return loop end |
#model_add_doas(model, sys_name, hot_water_loop, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, fan_max_flow_rate, economizer_control_type, building_type = nil, energy_recovery = false) ⇒ OpenStudio::Model::AirLoopHVAC
Creates a DOAS system with fan coil units for each zone.
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open if nil, this value will be autosized. FixedDryBulb, DOAS system.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4639 def model_add_doas(model, sys_name, hot_water_loop, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, fan_max_flow_rate, economizer_control_type, building_type = nil, energy_recovery = false) # Check the total OA requirement for all zones on the system tot_oa_req = 0 thermal_zones.each do |zone| tot_oa_req += thermal_zone_outdoor_airflow_rate(zone) break if tot_oa_req > 0 end # If the total OA requirement is zero do not add the DOAS system # because the simulations will fail. if tot_oa_req.zero? OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Not adding DOAS system for #{thermal_zones.size} zones because combined OA requirement for all zones is zero.") thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Model.Model', "---#{zone.name}") end return false end OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding DOAS system for #{thermal_zones.size} zones.") thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Model.Model', "---#{zone.name}") end # DOAS Controls # Reset SAT down to 55F during hotter outdoor # conditions for humidity management lo_oat_f = 60 sat_at_lo_oat_f = 60 hi_oat_f = 70 sat_at_hi_oat_f = 55 lo_oat_c = OpenStudio.convert(lo_oat_f, 'F', 'C').get hi_oat_c = OpenStudio.convert(hi_oat_f, 'F', 'C').get sat_at_lo_oat_c = OpenStudio.convert(sat_at_lo_oat_f, 'F', 'C').get sat_at_hi_oat_c = OpenStudio.convert(sat_at_hi_oat_f, 'F', 'C').get # Create a setpoint manager sat_oa_reset = OpenStudio::Model::SetpointManagerOutdoorAirReset.new(model) sat_oa_reset.setName('DOAS SAT Reset') sat_oa_reset.setControlVariable('Temperature') sat_oa_reset.setSetpointatOutdoorLowTemperature(sat_at_lo_oat_c) sat_oa_reset.setOutdoorLowTemperature(lo_oat_c) sat_oa_reset.setSetpointatOutdoorHighTemperature(sat_at_hi_oat_c) sat_oa_reset.setOutdoorHighTemperature(hi_oat_c) # hvac operation schedule hvac_op_sch = if hvac_op_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, hvac_op_sch) end # oa damper schedule oa_damper_sch = if oa_damper_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, oa_damper_sch) end # DOAS air_loop = OpenStudio::Model::AirLoopHVAC.new(model) if sys_name.nil? air_loop.setName("#{thermal_zones.size} Zone DOAS") else air_loop.setName(sys_name) end air_loop.setNightCycleControlType('CycleOnAny') # modify system sizing properties sizing_system = air_loop.sizingSystem # set central heating and cooling temperatures for sizing sizing_system.setCentralCoolingDesignSupplyAirTemperature(sat_at_hi_oat_c) sizing_system.setCentralHeatingDesignSupplyAirTemperature(sat_at_lo_oat_c) sizing_system.setSizingOption('Coincident') # load specification sizing_system.setTypeofLoadtoSizeOn('VentilationRequirement') sizing_system.setAllOutdoorAirinCooling(true) sizing_system.setAllOutdoorAirinHeating(true) sizing_system.setMinimumSystemAirFlowRatio(0.3) # set availability schedule air_loop.setAvailabilitySchedule(hvac_op_sch) # get the supply air inlet node airloop_supply_inlet = air_loop.supplyInletNode # create air loop fan # constant speed fan fan_static_pressure_in_h2o = 2.5 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan = OpenStudio::Model::FanConstantVolume.new(model, model.alwaysOnDiscreteSchedule) fan.setName('DOAS Fan') fan.setFanEfficiency(0.58175) fan.setPressureRise(fan_static_pressure_pa) if fan_max_flow_rate.nil? fan.autosizeMaximumFlowRate else fan.setMaximumFlowRate(OpenStudio.convert(fan_max_flow_rate, 'cfm', 'm^3/s').get) # unit of fan_max_flow_rate is cfm end fan.setMotorEfficiency(0.895) fan.setMotorInAirstreamFraction(1.0) fan.setEndUseSubcategory('DOAS Fans') fan.addToNode(airloop_supply_inlet) # create heating coil # water coil heating_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) hot_water_loop.addDemandBranchForComponent(heating_coil) heating_coil.controllerWaterCoil.get.setMinimumActuatedFlow(0) heating_coil.addToNode(airloop_supply_inlet) heating_coil.controllerWaterCoil.get.setControllerConvergenceTolerance(0.0001) # create cooling coil # water coil cooling_coil = OpenStudio::Model::CoilCoolingWater.new(model, model.alwaysOnDiscreteSchedule) chilled_water_loop.addDemandBranchForComponent(cooling_coil) cooling_coil.controllerWaterCoil.get.setMinimumActuatedFlow(0) cooling_coil.addToNode(airloop_supply_inlet) # create controller outdoor air controller_oa = OpenStudio::Model::ControllerOutdoorAir.new(model) controller_oa.setName('DOAS OA Controller') controller_oa.setEconomizerControlType(economizer_control_type) controller_oa.setMinimumLimitType('FixedMinimum') controller_oa.autosizeMinimumOutdoorAirFlowRate controller_oa.setMinimumOutdoorAirSchedule(oa_damper_sch) controller_oa.resetEconomizerMaximumLimitDryBulbTemperature # TODO: Yixing read the schedule from the Prototype Input if building_type == 'LargeHotel' controller_oa.setMinimumFractionofOutdoorAirSchedule(model_add_schedule(model, 'HotelLarge FLR_3_DOAS_OAminOAFracSchedule')) end controller_oa.resetEconomizerMaximumLimitEnthalpy controller_oa.resetMaximumFractionofOutdoorAirSchedule controller_oa.resetEconomizerMinimumLimitDryBulbTemperature # create ventilation schedules and assign to OA controller controller_oa.setHeatRecoveryBypassControlType('BypassWhenWithinEconomizerLimits') # create outdoor air system system_oa = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, controller_oa) system_oa.addToNode(airloop_supply_inlet) # add setpoint manager to supply equipment outlet node sat_oa_reset.addToNode(air_loop.supplyOutletNode) # ERV, if requested if energy_recovery # Get the OA system and its outboard OA node oa_system = air_loop.airLoopHVACOutdoorAirSystem.get oa_node = oa_system.outboardOANode.get # Create the ERV and set its properties erv = OpenStudio::Model::HeatExchangerAirToAirSensibleAndLatent.new(model) erv.addToNode(oa_node) erv.setHeatExchangerType('Rotary') # TODO: Come up with scheme for estimating power of ERV motor wheel # which might require knowing airlow (like prototype buildings do). # erv.setNominalElectricPower(value_new) erv.setEconomizerLockout(true) erv.setSupplyAirOutletTemperatureControl(false) erv.setSensibleEffectivenessat100HeatingAirFlow(0.76) erv.setSensibleEffectivenessat75HeatingAirFlow(0.81) erv.setLatentEffectivenessat100HeatingAirFlow(0.68) erv.setLatentEffectivenessat75HeatingAirFlow(0.73) erv.setSensibleEffectivenessat100CoolingAirFlow(0.76) erv.setSensibleEffectivenessat75CoolingAirFlow(0.81) erv.setLatentEffectivenessat100CoolingAirFlow(0.68) erv.setLatentEffectivenessat75CoolingAirFlow(0.73) # Increase fan pressure caused by the ERV fans = [] fans += air_loop.supplyComponents('OS:Fan:VariableVolume'.to_IddObjectType) fans += air_loop.supplyComponents('OS:Fan:ConstantVolume'.to_IddObjectType) unless fans.empty? if fans[0].to_FanConstantVolume.is_initialized fans[0].to_FanConstantVolume.get.setPressureRise(OpenStudio.convert(1.0, 'inH_{2}O', 'Pa').get) elsif fans[0].to_FanVariableVolume.is_initialized fans[0].to_FanVariableVolume.get.setPressureRise(OpenStudio.convert(1.0, 'inH_{2}O', 'Pa').get) end end end # add thermal zones to airloop thermal_zones.each do |zone| zone_name = zone.name.to_s # Ensure that zone sizing accounts for DOAS zone_sizing = zone.sizingZone zone_sizing.setAccountforDedicatedOutdoorAirSystem(true) zone_sizing.setDedicatedOutdoorAirSystemControlStrategy('ColdSupplyAir') zone_sizing.setDedicatedOutdoorAirLowSetpointTemperatureforDesign(sat_at_hi_oat_c) zone_sizing.setDedicatedOutdoorAirHighSetpointTemperatureforDesign(sat_at_lo_oat_c) # make an air terminal for the zone air_terminal = OpenStudio::Model::AirTerminalSingleDuctUncontrolled.new(model, model.alwaysOnDiscreteSchedule) air_terminal.setName(zone_name + 'Air Terminal') # attach new terminal to the zone and to the airloop air_loop.addBranchForZone(zone, air_terminal.to_StraightComponent) end return air_loop end |
#model_add_elevator(model, space, number_of_elevators, elevator_type, elevator_schedule, elevator_fan_schedule, elevator_lights_schedule, building_type = nil) ⇒ OpenStudio::Model::ElectricEquipment
Add an elevator the the specified space
to assign the elevators to. Traction, Hydraulic
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.Model.elevators.rb', line 14 def model_add_elevator(model, space, number_of_elevators, elevator_type, elevator_schedule, elevator_fan_schedule, elevator_lights_schedule, building_type = nil) # Lift motor assumptions lift_pwr_w = model_elevator_lift_power(model, elevator_type, building_type) # Size assumptions length_ft = 6.66 width_ft = 4.25 height_ft = 8.0 area_ft2 = length_ft * width_ft volume_ft3 = area_ft2 * height_ft # Ventilation assumptions vent_rate_acm = 1 # air changes per minute vent_rate_cfm = volume_ft3 / vent_rate_acm vent_pwr_w = model_elevator_fan_pwr(model, vent_rate_cfm) # Heating fraction radiant assumptions elec_equip_frac_radiant = 0.5 # Lighting assumptions design_ltg_lm_per_ft2 = 30 light_loss_factor = 0.75 pct_incandescent = model_elevator_lighting_pct_incandescent(model) pct_led = 1.0 - pct_incandescent incandescent_efficacy_lm_per_w = 10.0 led_efficacy_lm_per_w = 35.0 target_ltg_lm_per_ft2 = design_ltg_lm_per_ft2 / light_loss_factor # 40 target_ltg_lm = target_ltg_lm_per_ft2 * area_ft2 # 1132.2 lm_incandescent = target_ltg_lm * pct_incandescent # 792.54 lm_led = target_ltg_lm * pct_led # 339.66 w_incandescent = lm_incandescent / incandescent_efficacy_lm_per_w # 79.254 w_led = lm_led / led_efficacy_lm_per_w # 9.7 lighting_pwr_w = w_incandescent + w_led # Elevator lift motor elevator_definition = OpenStudio::Model::ElectricEquipmentDefinition.new(model) elevator_definition.setName('Elevator Lift Motor') elevator_definition.setDesignLevel(lift_pwr_w) elevator_definition.setFractionRadiant(elec_equip_frac_radiant) elevator_equipment = OpenStudio::Model::ElectricEquipment.new(elevator_definition) elevator_equipment.setName("#{number_of_elevators.round} Elevator Lift Motors") elevator_sch = model_add_schedule(model, elevator_schedule) elevator_equipment.setSchedule(elevator_sch) elevator_equipment.setSpace(space) elevator_equipment.setMultiplier(number_of_elevators) # Elevator fan elevator_fan_definition = OpenStudio::Model::ElectricEquipmentDefinition.new(model) elevator_fan_definition.setName('Elevator Fan') elevator_fan_definition.setDesignLevel(vent_pwr_w) elevator_fan_definition.setFractionRadiant(elec_equip_frac_radiant) elevator_fan_equipment = OpenStudio::Model::ElectricEquipment.new(elevator_fan_definition) elevator_fan_equipment.setName("#{number_of_elevators.round} Elevator Fans") elevator_fan_sch = model_add_schedule(model, elevator_fan_schedule) elevator_fan_equipment.setSchedule(elevator_fan_sch) elevator_fan_equipment.setSpace(space) elevator_fan_equipment.setMultiplier(number_of_elevators) # Elevator lights elevator_lights_definition = OpenStudio::Model::ElectricEquipmentDefinition.new(model) elevator_lights_definition.setName('Elevator Lights') elevator_lights_definition.setDesignLevel(lighting_pwr_w) elevator_lights_definition.setFractionRadiant(elec_equip_frac_radiant) elevator_lights_equipment = OpenStudio::Model::ElectricEquipment.new(elevator_lights_definition) elevator_lights_equipment.setName("#{number_of_elevators.round} Elevator Lights") elevator_lights_sch = model_add_schedule(model, elevator_lights_schedule) elevator_lights_equipment.setSchedule(elevator_lights_sch) elevator_lights_equipment.setSpace(space) elevator_lights_equipment.setMultiplier(number_of_elevators) return elevator_equipment end |
#model_add_elevators(model) ⇒ OpenStudio::Model::ElectricEquipment
Add elevators to the model based on the building size, number of stories, and building type. Logic was derived from the DOE prototype buildings.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.Model.elevators.rb', line 143 def model_add_elevators(model) # determine effective number of stories effective_num_stories = model_effective_num_stories(model) # determine elevator type # todo - add logic here or upstream to have some multi-story buildings without elevators (e.g. small multi-family and small hotels) elevator_type = nil if effective_num_stories[:below_grade] + effective_num_stories[:above_grade] < 2 OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.elevators', 'The building only has 1 story, no elevators will be added.') return nil # don't add elevators elsif effective_num_stories[:below_grade] + effective_num_stories[:above_grade] < 6 elevator_type = 'Hydraulic' else elevator_type = 'Traction' end # determine space to put elevator load in # largest bottom story (including basement) space that has multiplier of 1 bottom_spaces = {} bottom_story = effective_num_stories[:story_hash].keys.first bottom_story.spaces.each do |space| next if space.multiplier > 1 bottom_spaces[space] = space.floorArea end target_space = bottom_spaces.key(bottom_spaces.values.max) # determine number of elevators number_of_pass_elevators = 0.0 number_of_freight_elevators = 0.0 building_type_hash = {} # apply building type specific log to add to number of elevators based on Beyer (2009) rules of thumb space_type_hash = model_create_space_type_hash(model) space_type_hash.each do |space_type, hash| # update building_type_hash if building_type_hash.key?(hash[:stds_bldg_type]) building_type_hash[hash[:stds_bldg_type]] += hash[:floor_area] else building_type_hash[hash[:stds_bldg_type]] = hash[:floor_area] end # building type specific notes; prototype uses Beyer (2009) rules of thumb area_per_pass_elev_ft2 = nil units_per_pass_elevator = nil beds_per_pass_elevator = nil area_per_freight_elev_ft2 = nil units_per_freight_elevator = nil beds_per_freight_elevator = nil if ['Office', 'SmallOffice', 'MediumOffice', 'LargeOffice'].include?(hash[:stds_bldg_type]) # The office buildings have one elevator for every 45,000 ft2 (4,181 m2), # plus one service elevator for the large office building (500,000 ft^2). area_per_pass_elev_ft2 = 45_000 bldg_area_ft2 = OpenStudio.convert(model.getBuilding.floorArea, 'm^2', 'ft^2').get if bldg_area_ft2 > 500_000 area_per_freight_elev_ft2 = 500_000 end elsif ['SmallHotel', 'LargeHotel'].include?(hash[:stds_bldg_type]) # The hotels have one elevator for every 75 rooms. if hash[:stds_space_type].include?('GuestRoom') units_per_pass_elevator = 75.0 end # The large hotel includes one service elevator for every two public elevators, # plus one additional elevator for the dining and banquet facilities on the top floor. # None of the other space types generate elevators. if ['LargeHotel'].include?(hash[:stds_bldg_type]) && hash[:stds_space_type].include?('GuestRoom') units_per_freight_elevator = 150.0 elsif ['LargeHotel'].include?(hash[:stds_bldg_type]) && ['Banquet', 'Cafe'].include?(hash[:stds_space_type]) area_per_pass_elev_ft2 = 10_000 end elsif ['MidriseApartment', 'HighriseApartment'].include?(hash[:stds_bldg_type]) && hash[:stds_space_type].include?('Apartment') # The apartment building has one elevator for every 90 units units_per_pass_elevator = 90.0 elsif ['Hospital'].include?(hash[:stds_bldg_type]) # The hospital has one public and one service elevator for every 100 beds (250 total), # plus two elevators for the offices and cafeteria on the top floor. # None of the other space types generate elevators. if ['PatRoom', 'ICU_PatRm', 'ICU_Open'].include?(hash[:stds_space_type]) beds_per_pass_elevator = 100.0 beds_per_freight_elevator = 100.0 elsif ['Dining', 'Kitchen', 'Office'].include?(hash[:stds_space_type]) area_per_pass_elev_ft2 = 12_500 end elsif ['PrimarySchool', 'SecondarySchool'].include?(hash[:stds_bldg_type]) # 210,887 ft^2 secondary school prototype has 2 elevators area_per_pass_elev_ft2 = 100_000 elsif ['Outpatient'].include?(hash[:stds_bldg_type]) # 40,946 Outpatient has 3 elevators area_per_pass_elev_ft2 = 15_000 elsif ['Warehouse'].include?(hash[:stds_bldg_type]) # Warehouse has no elevators, but assume some would be needed area_per_freight_elev_ft2 = 250_000 else # TODO: - improve catchall for building types without elevator data, using same value as what Outpatient would be if not already in space type # includes RetailStandalone, RetailStripmall, QuickServiceRestaurant, FullServiceRestaurant, SuperMarket (made unique logic above for warehouse) area_per_pass_elev_ft2 = 15_000 end # passenger elevators if area_per_pass_elev_ft2 pass_elevs = hash[:floor_area] / OpenStudio.convert(area_per_pass_elev_ft2, 'ft^2', 'm^2').get number_of_pass_elevators += pass_elevs OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.elevators', "For #{space_type.name}, adding #{pass_elevs.round(1)} passenger elevators at 1 per #{area_per_pass_elev_ft2.round} ft^2.") end if units_per_pass_elevator pass_elevs = hash[:num_units] / units_per_pass_elevator number_of_pass_elevators += pass_elevs OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.elevators', "For #{space_type.name}, adding #{pass_elevs.round(1)} passenger elevators at 1 per #{units_per_pass_elevator} units.") end if beds_per_pass_elevator pass_elevs = hash[:num_beds] / beds_per_pass_elevator number_of_pass_elevators += pass_elevs OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.elevators', "For #{space_type.name}, adding #{pass_elevs.round(1)} passenger elevators at 1 per #{beds_per_pass_elevator} beds.") end # freight or service elevators if area_per_freight_elev_ft2 freight_elevs = hash[:floor_area] / OpenStudio.convert(area_per_freight_elev_ft2, 'ft^2', 'm^2').get number_of_freight_elevators += freight_elevs OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.elevators', "For #{space_type.name}, adding #{freight_elevs.round(1)} freight/service elevators at 1 per #{area_per_freight_elev_ft2.round} ft^2.") end if units_per_freight_elevator freight_elevs = hash[:num_units] / units_per_freight_elevator number_of_freight_elevators += freight_elevs OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.elevators', "For #{space_type.name}, adding #{freight_elevs.round(1)} freight/service elevators at 1 per #{units_per_freight_elevator} units.") end if beds_per_freight_elevator freight_elevs = hash[:num_beds] / beds_per_freight_elevator number_of_freight_elevators += freight_elevs OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.elevators', "For #{space_type.name}, adding #{freight_elevs.round(1)} freight/service elevators at 1 per #{beds_per_freight_elevator} beds.") end end # adjust number of elevators (can be double but if not 0 must be at least 1.0) if (number_of_pass_elevators > 0.0) && (number_of_pass_elevators < 1.0) number_of_pass_elevators = 1.0 end if (number_of_freight_elevators > 0.0) && (number_of_freight_elevators < 1.0) number_of_freight_elevators = 1.0 end number_of_elevators = number_of_pass_elevators + number_of_freight_elevators building_type = building_type_hash.key(building_type_hash.values.max) # rename space types as needed if building_type == 'Office' building_type = model_remap_office(model, building_type_hash['Office']) end if building_type == 'SmallHotel' then building_type = 'LargeHotel' end # no elevator schedules for SmallHotel if building_type == 'PrimarySchool' then building_type = 'SecondarySchool' end # no elevator schedules for PrimarySchool if building_type == 'Retail' then building_type = 'RetailStandalone' end # no elevator schedules for PrimarySchool if building_type == 'StripMall' then building_type = 'RetailStripmall' end # no elevator schedules for PrimarySchool if building_type == 'Outpatient' OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.elevators', 'Outpatient ElevatorPumpRoom plug loads contain the elevator loads. Not adding extra elevator loads on top of it.') end # Retrieve the Prototype Inputs from JSON search_criteria = { 'template' => template, 'building_type' => building_type } prototype_input = model_find_object(standards_data['prototype_inputs'], search_criteria, nil) if prototype_input.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.prototype.elevators', "Could not find prototype inputs for #{search_criteria}, cannot add elevators.") return nil end # assign schedules if ['Office', 'MediumOffice', 'MidriseApartment', 'HighriseApartment', 'SecondarySchool'].include?(building_type) elevator_schedule = prototype_input['elevator_schedule'] elevator_fan_schedule = prototype_input['elevator_fan_schedule'] elevator_lights_schedule = prototype_input['elevator_fan_schedule'] elsif ['LargeHotel', 'Hospital', 'LargeOffice'].include?(building_type) elevator_schedule = prototype_input['exterior_fuel_equipment1_schedule'] elevator_fan_schedule = prototype_input['exterior_fuel_equipment2_schedule'] elevator_lights_schedule = prototype_input['exterior_fuel_equipment2_schedule'] else # identify occupancy schedule from largest space type of this building type space_type_size = {} space_type_hash.each do |space_type, hash| next unless building_type.include?(hash[:stds_bldg_type]) space_type_size[space_type] = hash[:floor_area] end # Get the largest space type largest_space_type = space_type_size.key(space_type_size.values.max) # Get the occ sch, if one is specified occ_sch = nil if largest_space_type.defaultScheduleSet.is_initialized if largest_space_type.defaultScheduleSet.get.numberofPeopleSchedule.is_initialized occ_sch = largest_space_type.defaultScheduleSet.get.numberofPeopleSchedule.get end else occ_sch = model.alwaysOffDiscreteSchedule OpenStudio.logFree(OpenStudio::Warn, 'openstudio.prototype.elevators', "No occupancy schedule was specified for #{largest_space_type.name}, an always off schedule will be used for the elvevators and the elevators will never run.") end # clone and assign to elevator elev_sch = occ_sch.clone(model) elevator_schedule = elev_sch.name.to_s elevator_fan_schedule = elev_sch.name.to_s elevator_lights_schedule = elev_sch.name.to_s # TODO: - scale down peak value based on building type lookup, or make parametric schedule based on hours of operation # includes RetailStandalone, RetailStripmall, QuickServiceRestaurant, FullServiceRestaurant, SuperMarket (made unique logic above for warehouse) if building_type == 'Warehouse' # alter default profile, summer, winter, and rules max_value = 0.2 elev_sch = elev_sch.to_ScheduleRuleset.get day_schedules = [] elev_sch.scheduleRules.each do |rule| day_schedules << rule.daySchedule end day_schedules << elev_sch.defaultDaySchedule day_schedules << elev_sch.summerDesignDaySchedule day_schedules << elev_sch.winterDesignDaySchedule day_schedules.each do |day_schedule| values = day_schedule.values times = day_schedule.times values.each_with_index do |value, i| if value > max_value day_schedule.addValue(times[i], max_value) end end end end end # TODO: - currently add elevator doesn't allow me to choose the size of the elevator? # ref bldg pdf has formula for motor hp based on weight, speed, counterweight fraction and mech eff (in 5.1.4) # TODO: - should schedules change based on traction vs. hydraulic vs. just taking what is in prototype. # call add_elevator in Prototype.hvac_systems.rb to create elevator objects elevator = model_add_elevator(model, target_space, number_of_elevators, elevator_type, elevator_schedule, elevator_fan_schedule, elevator_lights_schedule, building_type) OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.elevators', "Adding #{elevator.multiplier.round(1)} #{elevator_type} elevators to the model in #{target_space.name}.") # check fraction lost on heat from elevator if traction, change to 100% lost if not setup that way. if elevator_type == 'Traction' elevator.definition.to_ElectricEquipmentDefinition.get.setFractionLost(1.0) elevator.definition.to_ElectricEquipmentDefinition.get.setFractionRadiant(0.0) end return elevator end |
#model_add_evap_cooler(model, thermal_zones, building_type = nil) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Creates an evaporative cooler for each zone and adds it to the model.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 3835 def model_add_evap_cooler(model, thermal_zones, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding evaporative coolers for #{thermal_zones.size} zones.") thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Model.Model', "---#{zone.name}") end # Evap cooler control temperatures min_sa_temp_f = 55 clg_sa_temp_f = 70 max_sa_temp_f = 78 htg_sa_temp_f = 122 # Not used min_sa_temp_c = OpenStudio.convert(min_sa_temp_f, 'F', 'C').get clg_sa_temp_c = OpenStudio.convert(clg_sa_temp_f, 'F', 'C').get max_sa_temp_c = OpenStudio.convert(max_sa_temp_f, 'F', 'C').get htg_sa_temp_c = OpenStudio.convert(htg_sa_temp_f, 'F', 'C').get approach_r = 3 # WetBulb approach approach_k = OpenStudio.convert(approach_r, 'R', 'K').get fan_static_pressure_in_h2o = 0.25 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get # EMS programs programs = [] # Make an evap cooler for each zone evap_coolers = [] thermal_zones.each do |zone| zone_name_clean = zone.name.get.delete(':') # Air loop air_loop = OpenStudio::Model::AirLoopHVAC.new(model) air_loop.setName("#{zone_name_clean} Evap Cooler") # Schedule to control the airloop availability air_loop_avail_sch = OpenStudio::Model::ScheduleConstant.new(model) air_loop_avail_sch.setName("#{air_loop.name} Availability Sch") air_loop_avail_sch.setValue(1) air_loop.setAvailabilitySchedule(air_loop_avail_sch) # EMS to turn on Evap Cooler if # there is a cooling load in the target zone. # Without this EMS, the airloop runs 24/7-365, # even when there is no load in the zone. # Create a sensor to read the zone load zn_load_sensor = OpenStudio::Model::EnergyManagementSystemSensor.new(model, 'Zone Predicted Sensible Load to Cooling Setpoint Heat Transfer Rate') zn_load_sensor.setName("#{zone_name_clean} Clg Load Sensor") zn_load_sensor.setKeyName(zone.handle.to_s) # Create an actuator to set the airloop availability air_loop_avail_actuator = OpenStudio::Model::EnergyManagementSystemActuator.new(air_loop_avail_sch, 'Schedule:Constant', 'Schedule Value') air_loop_avail_actuator.setName("#{air_loop.name} Availability Actuator") # Create a program to turn on Evap Cooler if # there is a cooling load in the target zone. # Load < 0.0 is a cooling load. avail_program = OpenStudio::Model::EnergyManagementSystemProgram.new(model) avail_program.setName("#{air_loop.name} Availability Control") avail_program_body = <<-EMS IF #{zn_load_sensor.handle} < 0.0 SET #{air_loop_avail_actuator.handle} = 1 ELSE SET #{air_loop_avail_actuator.handle} = 0 ENDIF EMS avail_program.setBody(avail_program_body) programs << avail_program # Setpoint follows OAT WetBulb evap_stpt_manager = OpenStudio::Model::SetpointManagerFollowOutdoorAirTemperature.new(model) evap_stpt_manager.setName("#{approach_r} F above OATwb") evap_stpt_manager.setReferenceTemperatureType('OutdoorAirWetBulb') evap_stpt_manager.setMaximumSetpointTemperature(max_sa_temp_c) evap_stpt_manager.setMinimumSetpointTemperature(min_sa_temp_c) evap_stpt_manager.setOffsetTemperatureDifference(approach_k) evap_stpt_manager.addToNode(air_loop.supplyOutletNode) # Air handler sizing sizing_system = air_loop.sizingSystem sizing_system.setCentralCoolingDesignSupplyAirTemperature(clg_sa_temp_c) sizing_system.setCentralHeatingDesignSupplyAirTemperature(htg_sa_temp_c) sizing_system.setAllOutdoorAirinCooling(true) sizing_system.setAllOutdoorAirinHeating(true) sizing_system.setSystemOutdoorAirMethod('ZoneSum') # Direct Evap Cooler # TODO better assumptions for evap cooler performance # and fan pressure rise evap = OpenStudio::Model::EvaporativeCoolerDirectResearchSpecial.new(model, model.alwaysOnDiscreteSchedule) evap.setName("#{zone.name} Evap Media") evap.autosizePrimaryAirDesignFlowRate evap.addToNode(air_loop.supplyInletNode) # Fan (cycling), must be inside unitary system to cycle on airloop fan = OpenStudio::Model::FanOnOff.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{zone.name} Evap Cooler Supply Fan") fan.setFanEfficiency(0.55) fan.setPressureRise(fan_static_pressure_pa) # Dummy zero-capacity cooling coil clg_coil = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model) clg_coil.setName('Zero-capacity DX Coil') clg_coil.setAvailabilitySchedule(alwaysOffDiscreteSchedule) unitary_system = OpenStudio::Model::AirLoopHVACUnitarySystem.new(model) unitary_system.setName("#{zone.name} Evap Cooler Cycling Fan") unitary_system.setSupplyFan(fan) unitary_system.setCoolingCoil(clg_coil) unitary_system.setControllingZoneorThermostatLocation(zone) unitary_system.setMaximumSupplyAirTemperature(50) unitary_system.setFanPlacement('BlowThrough') unitary_system.setSupplyAirFlowRateMethodDuringCoolingOperation('SupplyAirFlowRate') unitary_system.setSupplyAirFlowRateMethodDuringHeatingOperation('SupplyAirFlowRate') unitary_system.setSupplyAirFlowRateMethodWhenNoCoolingorHeatingisRequired('SupplyAirFlowRate') unitary_system.(alwaysOffDiscreteSchedule) unitary_system.addToNode(air_loop.supplyInletNode) # Outdoor air intake system oa_intake_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_intake_controller.setName("#{air_loop.name} OA Controller") oa_intake_controller.setMinimumLimitType('FixedMinimum') oa_intake_controller.autosizeMinimumOutdoorAirFlowRate oa_intake_controller.setMinimumFractionofOutdoorAirSchedule(model.alwaysOnDiscreteSchedule) controller_mv = oa_intake_controller.controllerMechanicalVentilation controller_mv.setName("#{air_loop.name} Vent Controller") controller_mv.setSystemOutdoorAirMethod('ZoneSum') oa_intake = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_intake_controller) oa_intake.setName("#{air_loop.name} OA Sys") oa_intake.addToNode(air_loop.supplyInletNode) # make an air terminal for the zone air_terminal = OpenStudio::Model::AirTerminalSingleDuctUncontrolled.new(model, model.alwaysOnDiscreteSchedule) air_terminal.setName("#{zone.name} Air Terminal") # attach new terminal to the zone and to the airloop air_loop.addBranchForZone(zone, air_terminal.to_StraightComponent) sizing_zone = zone.sizingZone sizing_zone.setCoolingDesignAirFlowMethod('DesignDay') sizing_zone.setHeatingDesignAirFlowMethod('DesignDay') sizing_zone.setZoneCoolingDesignSupplyAirTemperature(clg_sa_temp_c) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(htg_sa_temp_c) evap_coolers << air_loop end # Create a programcallingmanager avail_pcm = OpenStudio::Model::EnergyManagementSystemProgramCallingManager.new(model) avail_pcm.setName('Evap Cooler Availability Program Calling Manager') avail_pcm.setCallingPoint('AfterPredictorAfterHVACManagers') programs.each do |program| avail_pcm.addProgram(program) end return evap_coolers end |
#model_add_exhaust_fan(model, availability_sch_name, flow_rate, flow_fraction_schedule_name, balanced_exhaust_fraction_schedule_name, thermal_zones) ⇒ Array<OpenStudio::Model::FanZoneExhaust>
Adds an exhaust fan to each zone.
of the balanced exhaust fraction schedule.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5585 def model_add_exhaust_fan(model, availability_sch_name, flow_rate, flow_fraction_schedule_name, balanced_exhaust_fraction_schedule_name, thermal_zones) # Make an exhaust fan for each zone fans = [] thermal_zones.each do |zone| fan = OpenStudio::Model::FanZoneExhaust.new(model) fan.setName("#{zone.name} Exhaust Fan") fan.setAvailabilitySchedule(model_add_schedule(model, availability_sch_name)) # two ways to input the flow rate: Number of Array. # For number: assign directly. For Array: assign each flow rate to each according zone. if flow_rate.is_a? Numeric fan.setMaximumFlowRate(flow_rate) elsif flow_rate.class.to_s == 'Array' index = thermal_zones.index(zone) flow_rate_zone = flow_rate[index] fan.setMaximumFlowRate(flow_rate_zone) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', 'Wrong format of flow rate') end unless flow_fraction_schedule_name.nil? fan.setFlowFractionSchedule(model_add_schedule(model, flow_fraction_schedule_name)) end fan.setSystemAvailabilityManagerCouplingMode('Decoupled') unless balanced_exhaust_fraction_schedule_name.nil? fan.setBalancedExhaustFractionSchedule(model_add_schedule(model, balanced_exhaust_fraction_schedule_name)) end fan.addToThermalZone(zone) fans << fan end return fans end |
#model_add_four_pipe_fan_coil(model, hot_water_loop, chilled_water_loop, thermal_zones, ventilation = true) ⇒ Array<OpenStudio::Model::ZoneHVACFourPipeFanCoil>
Adds four pipe fan coil units to each zone.
the hot water loop that serves the fan coils. If nil, a zero-capacity, electric heating coil set to Always-Off will be included in the unit. the chilled water loop that serves the fan coils. no ventilation will be supplied through the unit, with the expectation that it will be provided by a DOAS or separate system. array of fan coil units.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4903 def model_add_four_pipe_fan_coil(model, hot_water_loop, chilled_water_loop, thermal_zones, ventilation = true) # Supply temps used across all zones zn_dsn_clg_sa_temp_f = 55 zn_dsn_htg_sa_temp_f = 104 zn_dsn_clg_sa_temp_c = OpenStudio.convert(zn_dsn_clg_sa_temp_f, 'F', 'C').get zn_dsn_htg_sa_temp_c = OpenStudio.convert(zn_dsn_htg_sa_temp_f, 'F', 'C').get # Make a fan coil unit for each zone fcus = [] thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding fan coil for #{zone.name}.") zone_sizing = zone.sizingZone zone_sizing.setZoneCoolingDesignSupplyAirTemperature(zn_dsn_clg_sa_temp_c) zone_sizing.setZoneHeatingDesignSupplyAirTemperature(zn_dsn_htg_sa_temp_c) fcu_clg_coil = nil if chilled_water_loop fcu_clg_coil = OpenStudio::Model::CoilCoolingWater.new(model, model.alwaysOnDiscreteSchedule) fcu_clg_coil.setName("#{zone.name} 'FCU Cooling Coil") chilled_water_loop.addDemandBranchForComponent(fcu_clg_coil) fcu_clg_coil.controllerWaterCoil.get.setMinimumActuatedFlow(0) else OpenStudio.logFree(OpenStudio::Error, 'openstudio.Model.Model', 'Fan coil units require a chilled water loop, but none was provided.') return fcus end fcu_htg_coil = nil if hot_water_loop fcu_htg_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) fcu_htg_coil.setName("#{zone.name} FCU Heating Coil") hot_water_loop.addDemandBranchForComponent(fcu_htg_coil) fcu_htg_coil.controllerWaterCoil.get.setMinimumActuatedFlow(0) else # Zero-capacity, always-off electric heating coil fcu_htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOffDiscreteSchedule) fcu_htg_coil.setName("#{zone.name} No Heat") fcu_htg_coil.setNominalCapacity(0) end fcu_fan = OpenStudio::Model::FanOnOff.new(model, model.alwaysOnDiscreteSchedule) fcu_fan.setName("#{zone.name} Fan Coil fan") fcu_fan.setFanEfficiency(0.16) fcu_fan.setPressureRise(270.9) # Pa fcu_fan.autosizeMaximumFlowRate fcu_fan.setMotorEfficiency(0.29) fcu_fan.setMotorInAirstreamFraction(1.0) fcu_fan.setEndUseSubcategory('FCU Fans') fcu = OpenStudio::Model::ZoneHVACFourPipeFanCoil.new(model, model.alwaysOnDiscreteSchedule, fcu_fan, fcu_clg_coil, fcu_htg_coil) fcu.setName("#{zone.name} FCU") fcu.setCapacityControlMethod('CyclingFan') fcu.autosizeMaximumSupplyAirFlowRate unless ventilation fcu.setMaximumOutdoorAirFlowRate(0) end fcu.addToThermalZone(zone) fcus << fcu end return fcus end |
#model_add_furnace_central_ac(model, thermal_zones, heating, cooling, ventilation) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Adds a forced air furnace or central AC to each zone. Code adapted from: github.com/NREL/OpenStudio-BEopt/blob/master/measures/ResidentialHVACFurnaceFuel/measure.rb
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5059 def model_add_furnace_central_ac(model, thermal_zones, heating, cooling, ventilation) equip_name = nil if heating && cooling equip_name = 'Central Heating and AC' elsif heating && !cooling equip_name = 'Furnace' elsif cooling && !heating equip_name = 'Central AC' else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Model.Model', 'Heating and cooling both disabled, not a valid Furnace or Central AC selection, no equipment was added.') return [] end # Defaults fan_pressure_rise_in = 0.5 # 0.5 in W.C. afue = 0.78 seer = 13 eer = 11.1 shr = 0.73 ac_w_per_cfm = 0.365 sat_htg_f = 120 sat_clg_f = 55 crank_case_heat_w = 0 crank_case_max_temp_f = 55 # Performance curves # These coefficients are in IP UNITS cool_cap_ft_coeffs_ip = [3.670270705, -0.098652414, 0.000955906, 0.006552414, -0.0000156, -0.000131877] cool_eir_ft_coeffs_ip = [-3.302695861, 0.137871531, -0.001056996, -0.012573945, 0.000214638, -0.000145054] cool_cap_fflow_coeffs = [0.718605468, 0.410099989, -0.128705457] cool_eir_fflow_coeffs = [1.32299905, -0.477711207, 0.154712157] cool_plf_fplr_coeffs = [0.8, 0.2, 0] # Convert coefficients from IP to SI cool_cap_ft_coeffs_si = convert_curve_biquadratic(cool_cap_ft_coeffs_ip) cool_eir_ft_coeffs_si = convert_curve_biquadratic(cool_eir_ft_coeffs_ip) # Make the curves ac_cap_ft = create_curve_biquadratic(cool_cap_ft_coeffs_si, 'AC-Cap-fT', 0, 100, 0, 100, nil, nil) ac_cap_fff = create_curve_quadratic(cool_cap_fflow_coeffs, 'AC-Cap-fFF', 0, 2, 0, 2, is_dimensionless = true) ac_eir_ft = create_curve_biquadratic(cool_eir_ft_coeffs_si, 'AC-EIR-fT', 0, 100, 0, 100, nil, nil) ac_eir_fff = create_curve_quadratic(cool_eir_fflow_coeffs, 'AC-EIR-fFF', 0, 2, 0, 2, is_dimensionless = true) ac_plf_fplr = create_curve_quadratic(cool_plf_fplr_coeffs, 'AC-PLF-fPLR', 0, 1, 0, 1, is_dimensionless = true) # Unit conversion fan_pressure_rise_pa = OpenStudio.convert(fan_pressure_rise_in, 'inH_{2}O', 'Pa').get furnaces = [] thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding furnace AC for #{zone.name}.") air_loop_name = "#{zone.name} #{equip_name}" air_loop = OpenStudio::Model::AirLoopHVAC.new(model) air_loop.setName(air_loop_name.to_s) # Heating Coil htg_coil = nil if heating htg_coil = OpenStudio::Model::CoilHeatingGas.new(model) htg_coil.setName("#{air_loop_name} htg coil") htg_coil.setGasBurnerEfficiency(afue_to_thermal_eff(afue)) htg_coil.setParasiticElectricLoad(0) htg_coil.setParasiticGasLoad(0) end # Cooling Coil clg_coil = nil if cooling clg_coil = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, ac_cap_ft, ac_cap_fff, ac_eir_ft, ac_eir_fff, ac_plf_fplr) clg_coil.setName("#{air_loop_name} cooling coil") clg_coil.setRatedSensibleHeatRatio(shr) clg_coil.setRatedCOP(OpenStudio::OptionalDouble.new(eer_to_cop(eer))) clg_coil.setRatedEvaporatorFanPowerPerVolumeFlowRate(OpenStudio::OptionalDouble.new(ac_w_per_cfm / OpenStudio.convert(1.0, 'cfm', 'm^3/s').get)) clg_coil.setNominalTimeForCondensateRemovalToBegin(OpenStudio::OptionalDouble.new(1000.0)) clg_coil.setRatioOfInitialMoistureEvaporationRateAndSteadyStateLatentCapacity(OpenStudio::OptionalDouble.new(1.5)) clg_coil.setMaximumCyclingRate(OpenStudio::OptionalDouble.new(3.0)) clg_coil.setLatentCapacityTimeConstant(OpenStudio::OptionalDouble.new(45.0)) clg_coil.setCondenserType('AirCooled') clg_coil.setCrankcaseHeaterCapacity(OpenStudio::OptionalDouble.new(crank_case_heat_w)) clg_coil.setMaximumOutdoorDryBulbTemperatureForCrankcaseHeaterOperation(OpenStudio::OptionalDouble.new(OpenStudio.convert(crank_case_max_temp_f, 'F', 'C').get)) end # Fan fan = OpenStudio::Model::FanOnOff.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{air_loop_name} supply fan") fan.setEndUseSubcategory('residential hvac fan') fan.setFanEfficiency(0.6) # Overall Efficiency of the Supply Fan, Motor and Drive fan.setPressureRise(fan_pressure_rise_pa) fan.setMotorEfficiency(1) fan.setMotorInAirstreamFraction(1) # Outdoor Air Intake oa_intake_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_intake_controller.setName("#{air_loop.name} OA Controller") oa_intake_controller.autosizeMinimumOutdoorAirFlowRate oa_intake = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_intake_controller) oa_intake.setName("#{air_loop.name} OA Sys") oa_intake.addToNode(air_loop.supplyInletNode) unless ventilation # Disable the OA oa_intake_controller.setMinimumOutdoorAirSchedule(alwaysOffDiscreteSchedule) end # Unitary System (holds the coils and fan) unitary = OpenStudio::Model::AirLoopHVACUnitarySystem.new(model) unitary.setName("#{air_loop_name} zoneunitary system") unitary.setAvailabilitySchedule(model.alwaysOnDiscreteSchedule) unitary.setMaximumSupplyAirTemperature(OpenStudio.convert(120.0, 'F', 'C').get) unitary.setControllingZoneorThermostatLocation(zone) unitary.addToNode(air_loop.supplyInletNode) # Set flow rates during different conditions unitary.setSupplyAirFlowRateDuringHeatingOperation(0) unless heating unitary.setSupplyAirFlowRateDuringCoolingOperation(0) unless cooling unitary.setSupplyAirFlowRateWhenNoCoolingorHeatingisRequired(0) unless ventilation # Attach the coils and fan unitary.setHeatingCoil(htg_coil) if htg_coil unitary.setCoolingCoil(clg_coil) if clg_coil unitary.setSupplyFan(fan) unitary.setFanPlacement('BlowThrough') unitary.(alwaysOffDiscreteSchedule) # Diffuser diffuser = OpenStudio::Model::AirTerminalSingleDuctUncontrolled.new(model, model.alwaysOnDiscreteSchedule) diffuser.setName(" #{zone.name} direct air") air_loop.addBranchForZone(zone, diffuser) furnaces << air_loop end return furnaces end |
#model_add_ground_hx_loop(model) ⇒ OpenStudio::Model::PlantLoop
Creates loop that roughly mimics a properly sized ground heat exchanger.
for supplemental heating/cooling and adds it to the model.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 522 def model_add_ground_hx_loop(model) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', 'Adding ground source loop.') # Ground source loop ground_hx_loop = OpenStudio::Model::PlantLoop.new(model) ground_hx_loop.setName('Ground HX Loop') ground_hx_loop.setMaximumLoopTemperature(80) ground_hx_loop.setMinimumLoopTemperature(5) # Loop controls max_delta_t_r = 12 # temp change at high and low entering condition min_inlet_f = 30 # low entering condition. max_inlet_f = 90 # high entering condition delta_t_k = OpenStudio.convert(max_delta_t_r, 'R', 'K').get min_inlet_c = OpenStudio.convert(min_inlet_f, 'F', 'C').get max_inlet_c = OpenStudio.convert(max_inlet_f, 'F', 'C').get # Calculate the linear formula that defines outlet # temperature based on inlet temperature of the ground hx. min_outlet_c = min_inlet_c + delta_t_k max_outlet_c = max_inlet_c - delta_t_k slope_c_per_c = (max_outlet_c - min_outlet_c) / (max_inlet_c - min_inlet_c) intercept_c = min_outlet_c - (slope_c_per_c * min_inlet_c) sizing_plant = ground_hx_loop.sizingPlant sizing_plant.setLoopType('Heating') sizing_plant.setDesignLoopExitTemperature(max_outlet_c) sizing_plant.setLoopDesignTemperatureDifference(delta_t_k) # Pump pump = OpenStudio::Model::PumpConstantSpeed.new(model) pump.setName("#{ground_hx_loop.name} Pump") pump_head_ft_h2o = 60 pump_head_press_pa = OpenStudio.convert(pump_head_ft_h2o, 'ftH_{2}O', 'Pa').get pump.setRatedPumpHead(pump_head_press_pa) pump.setPumpControlType('Intermittent') pump.addToNode(ground_hx_loop.supplyInletNode) # Use EMS and a PlantComponentTemperatureSource to mimic the operation # of the ground heat exchanger. # Schedule to actuate ground HX outlet temperature hx_temp_sch = OpenStudio::Model::ScheduleConstant.new(model) hx_temp_sch.setName('Ground HX Temp Sch') hx_temp_sch.setValue(24) # TODO hx = OpenStudio::Model::PlantComponentTemperatureSource.new(model) hx.setName('Ground HX') hx.setTemperatureSpecificationType('Scheduled') hx.setSourceTemperatureSchedule(hx_temp_sch) ground_hx_loop.addSupplyBranchForComponent(hx) hx_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, hx_temp_sch) hx_stpt_manager.setName("#{hx.name} Supply Outlet Setpoint") hx_stpt_manager.addToNode(hx.outletModelObject.get.to_Node.get) loop_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, hx_temp_sch) loop_stpt_manager.setName("#{ground_hx_loop.name} Supply Outlet Setpoint") loop_stpt_manager.addToNode(ground_hx_loop.supplyOutletNode) # Sensor to read supply inlet temperature supply_inlet_node = ground_hx_loop.supplyInletNode inlet_temp_sensor = OpenStudio::Model::EnergyManagementSystemSensor.new(model, 'System Node Temperature') inlet_temp_sensor.setName("#{hx.name} Inlet Temp Sensor") inlet_temp_sensor.setKeyName(supply_inlet_node.handle.to_s) # Actuator to set supply outlet temperature outlet_temp_actuator = OpenStudio::Model::EnergyManagementSystemActuator.new(hx_temp_sch, 'Schedule:Constant', 'Schedule Value') outlet_temp_actuator.setName("#{hx.name} Outlet Temp Actuator") # Actuator to set supply outlet temperature outlet_temp_actuator = OpenStudio::Model::EnergyManagementSystemActuator.new(hx_temp_sch, 'Schedule:Constant', 'Schedule Value') outlet_temp_actuator.setName("#{hx.name} Outlet Temp Actuator") # Program to control outlet temperature # Adjusts delta-t based on calculation of # slope and intercept from control temperatures program = OpenStudio::Model::EnergyManagementSystemProgram.new(model) program.setName("#{hx.name} Temp Control") program_body = <<-EMS SET Tin = #{inlet_temp_sensor.handle} SET Tout = #{slope_c_per_c.round(2)} * Tin + #{intercept_c.round(1)} SET #{outlet_temp_actuator.handle} = Tout EMS program.setBody(program_body) # Program calling manager pcm = OpenStudio::Model::EnergyManagementSystemProgramCallingManager.new(model) pcm.setName("#{program.name} Calling Mgr") pcm.setCallingPoint('InsideHVACSystemIterationLoop') pcm.addProgram(program) return ground_hx_loop end |
#model_add_ground_temperatures(model, building_type, climate_zone) ⇒ Object
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# File 'lib/openstudio-standards/weather/Weather.Model.rb', line 158 def model_add_ground_temperatures(model, building_type, climate_zone) ground_temp_vals = model_find_object(standards_data['ground_temperatures'], 'template' => template, 'climate_zone' => climate_zone, 'building_type' => building_type) if ground_temp_vals && ground_temp_vals['jan'] ground_temp = model.getSiteGroundTemperatureBuildingSurface ground_temp.setJanuaryGroundTemperature(ground_temp_vals['jan']) ground_temp.setFebruaryGroundTemperature(ground_temp_vals['feb']) ground_temp.setMarchGroundTemperature(ground_temp_vals['mar']) ground_temp.setAprilGroundTemperature(ground_temp_vals['apr']) ground_temp.setMayGroundTemperature(ground_temp_vals['may']) ground_temp.setJuneGroundTemperature(ground_temp_vals['jun']) ground_temp.setJulyGroundTemperature(ground_temp_vals['jul']) ground_temp.setAugustGroundTemperature(ground_temp_vals['aug']) ground_temp.setSeptemberGroundTemperature(ground_temp_vals['sep']) ground_temp.setOctoberGroundTemperature(ground_temp_vals['oct']) ground_temp.setNovemberGroundTemperature(ground_temp_vals['nov']) ground_temp.setDecemberGroundTemperature(ground_temp_vals['dec']) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.weather.Model', 'Could not find ground temperatures; will use generic temperatures, which will skew results.') ground_temp = model.getSiteGroundTemperatureBuildingSurface ground_temp.setJanuaryGroundTemperature(19.527) ground_temp.setFebruaryGroundTemperature(19.502) ground_temp.setMarchGroundTemperature(19.536) ground_temp.setAprilGroundTemperature(19.598) ground_temp.setMayGroundTemperature(20.002) ground_temp.setJuneGroundTemperature(21.640) ground_temp.setJulyGroundTemperature(22.225) ground_temp.setAugustGroundTemperature(22.375) ground_temp.setSeptemberGroundTemperature(21.449) ground_temp.setOctoberGroundTemperature(20.121) ground_temp.setNovemberGroundTemperature(19.802) ground_temp.setDecemberGroundTemperature(19.633) end end |
#model_add_high_temp_radiant(model, sys_name, thermal_zones, heating_type, combustion_efficiency, building_type = nil) ⇒ Array<OpenStudio::Model::ZoneHVACHighTemperatureRadiant>
Creates a high temp radiant heater for each zone and adds it to the model.
Gas, Electric array of the resulting radiant heaters.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 3806 def model_add_high_temp_radiant(model, sys_name, thermal_zones, heating_type, combustion_efficiency, building_type = nil) # Make a high temp radiant heater for each zone rad_heaters = [] thermal_zones.each do |zone| high_temp_radiant = OpenStudio::Model::ZoneHVACHighTemperatureRadiant.new(model) high_temp_radiant.setName("#{zone.name} High Temp Radiant") high_temp_radiant.setFuelType(heating_type) high_temp_radiant.setCombustionEfficiency(combustion_efficiency) high_temp_radiant.setTemperatureControlType(control_type) high_temp_radiant.setFractionofInputConvertedtoRadiantEnergy(0.8) high_temp_radiant.setHeatingThrottlingRange(2) high_temp_radiant.addToThermalZone(zone) rad_heaters << high_temp_radiant end return rad_heaters end |
#model_add_hp_loop(model, building_type = nil) ⇒ OpenStudio::Model::PlantLoop
replace cooling tower with fluid cooler after fixing sizing inputs
Creates a heat pump loop which has a boiler and fluid cooler
for supplemental heating/cooling and adds it to the model.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 400 def model_add_hp_loop(model, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', 'Adding heat pump loop.') # Heat Pump loop heat_pump_water_loop = OpenStudio::Model::PlantLoop.new(model) heat_pump_water_loop.setName('Heat Pump Loop') heat_pump_water_loop.setMaximumLoopTemperature(80) heat_pump_water_loop.setMinimumLoopTemperature(5) # Heat Pump loop controls hp_high_temp_f = 65 # Supplemental heat below 65F hp_low_temp_f = 41 # Supplemental cooling below 41F hp_temp_sizing_f = 102.2 # CW sized to deliver 102.2F hp_delta_t_r = 19.8 # 19.8F delta-T boiler_hw_temp_f = 86 # Boiler makes 86F water hp_high_temp_c = OpenStudio.convert(hp_high_temp_f, 'F', 'C').get hp_low_temp_c = OpenStudio.convert(hp_low_temp_f, 'F', 'C').get hp_temp_sizing_c = OpenStudio.convert(hp_temp_sizing_f, 'F', 'C').get hp_delta_t_k = OpenStudio.convert(hp_delta_t_r, 'R', 'K').get boiler_hw_temp_c = OpenStudio.convert(boiler_hw_temp_f, 'F', 'C').get hp_high_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) hp_high_temp_sch.setName("Heat Pump Loop High Temp - #{hp_high_temp_f}F") hp_high_temp_sch.defaultDaySchedule.setName("Heat Pump Loop High Temp - #{hp_high_temp_f}F Default") hp_high_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), hp_high_temp_c) hp_low_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) hp_low_temp_sch.setName("Heat Pump Loop Low Temp - #{hp_low_temp_f}F") hp_low_temp_sch.defaultDaySchedule.setName("Heat Pump Loop Low Temp - #{hp_low_temp_f}F Default") hp_low_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), hp_low_temp_c) hp_stpt_manager = OpenStudio::Model::SetpointManagerScheduledDualSetpoint.new(model) hp_stpt_manager.setHighSetpointSchedule(hp_high_temp_sch) hp_stpt_manager.setLowSetpointSchedule(hp_low_temp_sch) hp_stpt_manager.addToNode(heat_pump_water_loop.supplyOutletNode) sizing_plant = heat_pump_water_loop.sizingPlant sizing_plant.setLoopType('Heating') sizing_plant.setDesignLoopExitTemperature(hp_temp_sizing_c) sizing_plant.setLoopDesignTemperatureDifference(hp_delta_t_k) # Heat Pump loop pump hp_pump = OpenStudio::Model::PumpConstantSpeed.new(model) hp_pump.setName('Heat Pump Loop Pump') hp_pump_head_ft_h2o = 60 hp_pump_head_press_pa = OpenStudio.convert(hp_pump_head_ft_h2o, 'ftH_{2}O', 'Pa').get hp_pump.setRatedPumpHead(hp_pump_head_press_pa) hp_pump.setPumpControlType('Intermittent') hp_pump.addToNode(heat_pump_water_loop.supplyInletNode) # Cooling towers if building_type == 'LargeOffice' || building_type == 'LargeOfficeDetail' # TODO: For some reason the FluidCoolorTwoSpeed is causing simulation failures. # might need to look into the defaults # cooling_tower = OpenStudio::Model::FluidCoolerTwoSpeed.new(self) cooling_tower = OpenStudio::Model::CoolingTowerTwoSpeed.new(model) cooling_tower.setName("#{heat_pump_water_loop.name} Central Tower") heat_pump_water_loop.addSupplyBranchForComponent(cooling_tower) #### Add SPM Scheduled Dual Setpoint to outlet of Fluid Cooler so correct Plant Operation Scheme is generated hp_stpt_manager_2 = OpenStudio::Model::SetpointManagerScheduledDualSetpoint.new(model) hp_stpt_manager_2.setHighSetpointSchedule(hp_high_temp_sch) hp_stpt_manager_2.setLowSetpointSchedule(hp_low_temp_sch) hp_stpt_manager_2.addToNode(cooling_tower.outletModelObject.get.to_Node.get) else # TODO: replace with FluidCooler:TwoSpeed when available # cooling_tower = OpenStudio::Model::CoolingTowerTwoSpeed.new(self) # cooling_tower.setName("#{heat_pump_water_loop.name} Sup Cooling Tower") # heat_pump_water_loop.addSupplyBranchForComponent(cooling_tower) fluid_cooler = OpenStudio::Model::EvaporativeFluidCoolerSingleSpeed.new(model) fluid_cooler.setName("#{heat_pump_water_loop.name} Sup Cooling Tower") fluid_cooler.setDesignSprayWaterFlowRate(0.002208) # Based on HighRiseApartment fluid_cooler.setPerformanceInputMethod('UFactorTimesAreaAndDesignWaterFlowRate') heat_pump_water_loop.addSupplyBranchForComponent(fluid_cooler) end # Boiler boiler = OpenStudio::Model::BoilerHotWater.new(model) boiler.setName("#{heat_pump_water_loop.name} Sup Boiler") boiler.setFuelType('Gas') boiler.setDesignWaterOutletTemperature(boiler_hw_temp_c) boiler.setMinimumPartLoadRatio(0) boiler.setMaximumPartLoadRatio(1.2) boiler.setOptimumPartLoadRatio(1) boiler.setBoilerFlowMode('ConstantFlow') heat_pump_water_loop.addSupplyBranchForComponent(boiler) #### Add SPM Scheduled Dual Setpoint to outlet of Boiler so correct Plant Operation Scheme is generated hp_stpt_manager_3 = OpenStudio::Model::SetpointManagerScheduledDualSetpoint.new(model) hp_stpt_manager_3.setHighSetpointSchedule(hp_high_temp_sch) hp_stpt_manager_3.setLowSetpointSchedule(hp_low_temp_sch) hp_stpt_manager_3.addToNode(boiler.outletModelObject.get.to_Node.get) # Heat Pump water loop pipes supply_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) supply_bypass_pipe.setName("#{heat_pump_water_loop.name} Supply Bypass") heat_pump_water_loop.addSupplyBranchForComponent(supply_bypass_pipe) demand_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_bypass_pipe.setName("#{heat_pump_water_loop.name} Demand Bypass") heat_pump_water_loop.addDemandBranchForComponent(demand_bypass_pipe) supply_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) supply_outlet_pipe.setName("#{heat_pump_water_loop.name} Supply Outlet") supply_outlet_pipe.addToNode(heat_pump_water_loop.supplyOutletNode) demand_inlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_inlet_pipe.setName("#{heat_pump_water_loop.name} Demand Inlet") demand_inlet_pipe.addToNode(heat_pump_water_loop.demandInletNode) demand_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_outlet_pipe.setName("#{heat_pump_water_loop.name} Demand Outlet") demand_outlet_pipe.addToNode(heat_pump_water_loop.demandOutletNode) return heat_pump_water_loop end |
#model_add_hvac(model, building_type, climate_zone, prototype_input, epw_file) ⇒ Object
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.Model.hvac.rb', line 2 def model_add_hvac(model, building_type, climate_zone, prototype_input, epw_file) OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Started Adding HVAC') # Get the list of HVAC systems, as defined # for each building in the Prototype.building_name files. # Add each HVAC system @system_to_space_map.each do |system| thermal_zones = model_get_zones_from_spaces_on_system(model, system) return_plenum = model_get_return_plenum_from_system(model, system) # Add the HVAC systems case system['type'] when 'VAV' # Retrieve the existing hot water loop # or add a new one if necessary. hot_water_loop = nil hot_water_loop = if model.getPlantLoopByName('Hot Water Loop').is_initialized model.getPlantLoopByName('Hot Water Loop').get else model_add_hw_loop(model, 'NaturalGas', building_type) end # Retrieve the existing chilled water loop # or add a new one if necessary. chilled_water_loop = nil if model.getPlantLoopByName('Chilled Water Loop').is_initialized chilled_water_loop = model.getPlantLoopByName('Chilled Water Loop').get else condenser_water_loop = nil if system['chiller_cooling_type'] == 'WaterCooled' condenser_water_loop = model_add_cw_loop(model, 'Open Cooling Tower', 'Centrifugal', 'Fan Cycling', 2, 1, building_type) end chilled_water_loop = model_add_chw_loop(model, system['chw_pumping_type'], system['chiller_cooling_type'], system['chiller_condenser_type'], system['chiller_compressor_type'], 'Electricity', condenser_water_loop) end # Add the VAV model_add_vav_reheat(model, system['name'], hot_water_loop, chilled_water_loop, thermal_zones, system['operation_schedule'], system['oa_damper_schedule'], vav_fan_efficiency = 0.62, vav_fan_motor_efficiency = 0.9, vav_fan_pressure_rise = OpenStudio.convert(4.0, 'inH_{2}O', 'Pa').get, return_plenum, reheat_type = 'Water', building_type) when 'CAV' # Retrieve the existing hot water loop # or add a new one if necessary. hot_water_loop = nil hot_water_loop = if model.getPlantLoopByName('Hot Water Loop').is_initialized model.getPlantLoopByName('Hot Water Loop').get else model_add_hw_loop(model, 'NaturalGas', building_type) end chilled_water_loop = nil if model.getPlantLoopByName('Chilled Water Loop').is_initialized chilled_water_loop = model.getPlantLoopByName('Chilled Water Loop').get elsif building_type == 'Hospital' condenser_water_loop = nil if system['chiller_cooling_type'] == 'WaterCooled' condenser_water_loop = model_add_cw_loop(model) end chilled_water_loop = model_add_chw_loop(model, system['chw_pumping_type'], system['chiller_cooling_type'], system['chiller_condenser_type'], system['chiller_compressor_type'], 'Electricity', condenser_water_loop) end # Add the CAV model_add_cav(model, system['name'], hot_water_loop, thermal_zones, system['operation_schedule'], system['oa_damper_schedule'], vav_fan_efficiency = 0.62, vav_fan_motor_efficiency = 0.9, vav_fan_pressure_rise = OpenStudio.convert(4.0, 'inH_{2}O', 'Pa').get, chilled_water_loop, building_type) when 'PSZ-AC' # Special logic to make unitary heat pumps all blow-through fan_position = 'DrawThrough' if system['heating_type'] == 'Single Speed Heat Pump' || system['heating_type'] == 'Water To Air Heat Pump' fan_position = 'BlowThrough' end # Special logic to make a heat pump loop if necessary heat_pump_loop = nil if system['heating_type'] == 'Water To Air Heat Pump' heat_pump_loop = model_add_hp_loop(model, building_type) end model_add_psz_ac(model, system['name'], heat_pump_loop, # Typically nil unless water source hp heat_pump_loop, # Typically nil unless water source hp thermal_zones, system['operation_schedule'], system['oa_damper_schedule'], fan_position, system['fan_type'], system['heating_type'], system['supplemental_heating_type'], system['cooling_type'], building_type) when 'PVAV' # Retrieve the existing hot water loop # or add a new one if necessary. hot_water_loop = nil hot_water_loop = if model.getPlantLoopByName('Hot Water Loop').is_initialized model.getPlantLoopByName('Hot Water Loop').get elsif building_type == 'MediumOffice' nil else model_add_hw_loop(model, 'NaturalGas', building_type) end model_add_pvav(model, system['name'], thermal_zones, system['operation_schedule'], system['oa_damper_schedule'], electric_reheat = false, hot_water_loop, chilled_water_loop = nil, return_plenum, building_type) when 'DOAS' # Retrieve the existing hot water loop # or add a new one if necessary. hot_water_loop = nil hot_water_loop = if model.getPlantLoopByName('Hot Water Loop').is_initialized model.getPlantLoopByName('Hot Water Loop').get else model_add_hw_loop(model, 'NaturalGas', building_type) end # Retrieve the existing chilled water loop # or add a new one if necessary. chilled_water_loop = nil if model.getPlantLoopByName('Chilled Water Loop').is_initialized chilled_water_loop = model.getPlantLoopByName('Chilled Water Loop').get else condenser_water_loop = nil if system['chiller_cooling_type'] == 'WaterCooled' condenser_water_loop = model_add_cw_loop(model, 'Open Cooling Tower', 'Centrifugal', 'Fan Cycling', 2, 1, building_type) end chilled_water_loop = model_add_chw_loop(model, system['chw_pumping_type'], system['chiller_cooling_type'], system['chiller_condenser_type'], system['chiller_compressor_type'], 'Electricity', condenser_water_loop) end model_add_doas(model, system['name'], hot_water_loop, chilled_water_loop, thermal_zones, system['operation_schedule'], system['oa_damper_schedule'], system['fan_maximum_flow_rate'], system['economizer_control_type'], building_type) model_add_four_pipe_fan_coil(model, hot_water_loop, chilled_water_loop, thermal_zones, ventilation=false) when 'DC' # Data Center # Retrieve the existing hot water loop # or add a new one if necessary. hot_water_loop = nil hot_water_loop = if model.getPlantLoopByName('Hot Water Loop').is_initialized model.getPlantLoopByName('Hot Water Loop').get else model_add_hw_loop(model, 'NaturalGas', building_type) end # Retrieve the existing heat pump loop # or add a new one if necessary. heat_pump_loop = nil heat_pump_loop = if model.getPlantLoopByName('Heat Pump Loop').is_initialized model.getPlantLoopByName('Heat Pump Loop').get else model_add_hp_loop(model, building_type) end model_add_data_center_hvac(model, nil, hot_water_loop, heat_pump_loop, thermal_zones, system['flow_fraction_schedule'], system['flow_fraction_schedule'], system['main_data_center']) when 'SAC' model_add_split_ac(model, nil, thermal_zones, system['operation_schedule'], system['oa_damper_schedule'], system['fan_type'], system['heating_type'], system['heating_type'], system['cooling_type'], building_type) when 'UnitHeater' model_add_unitheater(model, nil, thermal_zones, system['operation_schedule'], system['fan_type'], OpenStudio.convert(system['fan_static_pressure'], 'inH_{2}O', 'Pa').get, system['heating_type'], hot_water_loop = nil, building_type) when 'PTAC' model_add_ptac(model, nil, nil, thermal_zones, system['fan_type'], system['heating_type'], system['cooling_type'], building_type) when 'PTHP' model_add_pthp(model, nil, thermal_zones, system['fan_type']) when 'Exhaust Fan' model_add_exhaust_fan(model, system['operation_schedule'], system['flow_rate'], system['flow_fraction_schedule'], system['balanced_exhaust_fraction_schedule'], thermal_zones) when 'Zone Ventilation' model_add_zone_ventilation(model, system['operation_schedule'], system['flow_rate'], system['ventilation_type'], thermal_zones) when 'Refrigeration' model_add_refrigeration(model, system['case_type'], system['cooling_capacity_per_length'], system['length'], system['evaporator_fan_pwr_per_length'], system['lighting_per_length'], system['lighting_schedule'], system['defrost_pwr_per_length'], system['restocking_schedule'], system['cop'], system['cop_f_of_t_curve_name'], system['condenser_fan_pwr'], system['condenser_fan_pwr_curve_name'], thermal_zones[0]) # When multiple cases and walk-ins asssigned to a system when 'Refrigeration_system' model_add_refrigeration_system(model, system['compressor_type'], system['name'], system['cases'], system['walkins'], thermal_zones[0]) when 'WSHP' condenser_loop = case system['heating_type'] when 'Gas' model_get_or_add_heat_pump_loop(model) else model_get_or_add_ambient_water_loop(model) end model_add_water_source_hp(model, condenser_loop, thermal_zones, ventilation=true) when 'Fan Coil' case system['heating_type'] when 'Gas', 'DistrictHeating', 'Electricity' hot_water_loop = model_get_or_add_hot_water_loop(model, system['heating_type']) when nil hot_water_loop = nil end case system['cooling_type'] when 'Electricity', 'DistrictCooling' chilled_water_loop = model_get_or_add_chilled_water_loop(model, system['cooling_type'], air_cooled = true) when nil chilled_water_loop = nil end model_add_four_pipe_fan_coil(model, hot_water_loop, chilled_water_loop, thermal_zones, ventilation=true) when 'Baseboards' case system['heating_type'] when 'Gas', 'DistrictHeating' hot_water_loop = model_get_or_add_hot_water_loop(model, main_heat_fuel) when 'Electricity' hot_water_loop = nil when nil # TODO: Error, Baseboard systems must have a main_heat_fuel # return ?? end model_add_baseboard(model, hot_water_loop, thermal_zones) when 'Unconditioned' OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "System type is Unconditioned. No system will be added.") else OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Model', "System type '#{system['type']}' is not recognized for system named '#{system['name']}'. This system will not be added.") end end OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Finished adding HVAC") return true end |
#model_add_hvac_system(model, system_type, main_heat_fuel, zone_heat_fuel, cool_fuel, zones) ⇒ Bool
Add the specified system type to the specified zones based on the specified template. For multi-zone system types, add one system per story.
TODO enumerate the valid strings
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5836 def model_add_hvac_system(model, system_type, main_heat_fuel, zone_heat_fuel, cool_fuel, zones) # Don't do anything if there are no zones return true if zones.empty? case system_type when 'PTAC' case main_heat_fuel when 'NaturalGas', 'DistrictHeating' heating_type = 'Water' hot_water_loop = model_get_or_add_hot_water_loop(model, main_heat_fuel) when 'Electricity' heating_type = main_heat_fuel hot_water_loop = nil when nil heating_type = zone_heat_fuel hot_water_loop = nil end model_add_ptac(model, sys_name = nil, hot_water_loop, zones, fan_type = 'ConstantVolume', heating_type, cooling_type = 'Single Speed DX AC') when 'PTHP' model_add_pthp(model, sys_name = nil, zones, fan_type = 'ConstantVolume') when 'PSZ-AC' case main_heat_fuel when 'NaturalGas' heating_type = main_heat_fuel supplemental_heating_type = 'Electricity' hot_water_loop = nil when 'DistrictHeating' heating_type = 'Water' supplemental_heating_type = 'Electricity' hot_water_loop = model_get_or_add_hot_water_loop(model, main_heat_fuel) when nil heating_type = nil supplemental_heating_type = nil hot_water_loop = nil when 'Electricity' heating_type = main_heat_fuel supplemental_heating_type = 'Electricity' end case cool_fuel when 'DistrictCooling' chilled_water_loop = model_get_or_add_chilled_water_loop(model, cool_fuel) cooling_type = 'Water' else chilled_water_loop = nil cooling_type = 'Single Speed DX AC' end model_add_psz_ac(model, sys_name = nil, hot_water_loop, chilled_water_loop, zones, hvac_op_sch = nil, oa_damper_sch = nil, fan_location = 'DrawThrough', fan_type = 'ConstantVolume', heating_type, supplemental_heating_type, cooling_type) when 'PSZ-HP' model_add_psz_ac(model, sys_name = 'PSZ-HP', hot_water_loop = nil, chilled_water_loop = nil, zones, hvac_op_sch = nil, oa_damper_sch = nil, fan_location = 'DrawThrough', fan_type = 'ConstantVolume', heating_type = 'Single Speed Heat Pump', supplemental_heating_type = 'Electricity', cooling_type = 'Single Speed Heat Pump') when 'PSZ-VAV' case main_heat_fuel when 'NaturalGas' heating_type = main_heat_fuel supplemental_heating_type = 'Electricity' when nil heating_type = nil supplemental_heating_type = nil when 'Electricity' heating_type = main_heat_fuel supplemental_heating_type = 'Electricity' end model_add_psz_vav(model, sys_name='PSZ-VAV', zones, hvac_op_sch=nil, oa_damper_sch=nil, heating_type, supplemental_heating_type) when 'Fan Coil' case main_heat_fuel when 'NaturalGas', 'DistrictHeating', 'Electricity' hot_water_loop = model_get_or_add_hot_water_loop(model, main_heat_fuel) when nil hot_water_loop = nil end case cool_fuel when 'Electricity', 'DistrictCooling' chilled_water_loop = model_get_or_add_chilled_water_loop(model, cool_fuel, air_cooled = true) when nil chilled_water_loop = nil end model_add_four_pipe_fan_coil(model, hot_water_loop, chilled_water_loop, zones) when 'Baseboards' case main_heat_fuel when 'NaturalGas', 'DistrictHeating' hot_water_loop = model_get_or_add_hot_water_loop(model, main_heat_fuel) when 'Electricity' hot_water_loop = nil when nil # TODO: Error, Baseboard systems must have a main_heat_fuel # return ?? end model_add_baseboard(model, hot_water_loop, zones) when 'Unit Heaters' model_add_unitheater(model, sys_name = nil, zones, hvac_op_sch = nil, fan_control_type = 'ConstantVolume', fan_pressure_rise = OpenStudio.convert(0.2, 'inH_{2}O', 'Pa').get, main_heat_fuel, hot_water_loop = nil) when 'Window AC' model_add_window_ac(model, zones) when 'Residential AC' model_add_furnace_central_ac(model, zones, heating = false, cooling = true, ventilation = false) when 'Forced Air Furnace' model_add_furnace_central_ac(model, zones, heating = true, cooling = false, ventilation = true) when 'Residential Forced Air Furnace' model_add_furnace_central_ac(model, zones, heating = true, cooling = false, ventilation = false) when 'Residential Air Source Heat Pump' heating = true unless main_heat_fuel.nil? cooling = true unless cool_fuel.nil? model_add_central_air_source_heat_pump(model, zones, heating, cooling, ventilation = false) when 'VAV Reheat' hot_water_loop = model_get_or_add_hot_water_loop(model, main_heat_fuel) chilled_water_loop = model_get_or_add_chilled_water_loop(model, cool_fuel, air_cooled = false) reheat_type = 'Water' if zone_heat_fuel == 'Electricity' reheat_type = 'Electricity' end model_add_vav_reheat(model, sys_name = nil, hot_water_loop, chilled_water_loop, zones, hvac_op_sch = nil, oa_damper_sch = nil, vav_fan_efficiency = 0.62, vav_fan_motor_efficiency = 0.9, vav_fan_pressure_rise = OpenStudio.convert(4.0, 'inH_{2}O', 'Pa').get, return_plenum = nil, reheat_type) when 'VAV No Reheat' chilled_water_loop = model_get_or_add_chilled_water_loop(model, cool_fuel, air_cooled = false) model_add_vav_reheat(model, sys_name = nil, hot_water_loop, chilled_water_loop, zones, hvac_op_sch = nil, oa_damper_sch = nil, vav_fan_efficiency = 0.62, vav_fan_motor_efficiency = 0.9, vav_fan_pressure_rise = OpenStudio.convert(4.0, 'inH_{2}O', 'Pa').get, return_plenum = nil, reheat_type = nil) when 'VAV Gas Reheat' chilled_water_loop = model_get_or_add_chilled_water_loop(model, cool_fuel, air_cooled = false) model_add_vav_reheat(model, sys_name = nil, hot_water_loop, chilled_water_loop, zones, hvac_op_sch = nil, oa_damper_sch = nil, vav_fan_efficiency = 0.62, vav_fan_motor_efficiency = 0.9, vav_fan_pressure_rise = OpenStudio.convert(4.0, 'inH_{2}O', 'Pa').get, return_plenum = nil, reheat_type = 'NaturalGas') when 'PVAV Reheat' hot_water_loop = model_get_or_add_hot_water_loop(model, main_heat_fuel) chilled_water_loop = case cool_fuel when 'Electricity' nil else model_get_or_add_chilled_water_loop(model, cool_fuel, air_cooled = false) end electric_reheat = false if zone_heat_fuel == 'Electricity' electric_reheat = true end model_add_pvav(model, sys_name = nil, zones, hvac_op_sch = nil, oa_damper_sch = nil, electric_reheat, hot_water_loop, chilled_water_loop, return_plenum = nil) when 'PVAV PFP Boxes' chilled_water_loop = case cool_fuel when 'DistrictCooling' model_get_or_add_chilled_water_loop(model, cool_fuel) end model_add_pvav_pfp_boxes(model, sys_name = nil, zones, hvac_op_sch = nil, oa_damper_sch = nil, vav_fan_efficiency = 0.62, vav_fan_motor_efficiency = 0.9, vav_fan_pressure_rise = OpenStudio.convert(4.0, 'inH_{2}O', 'Pa').get, chilled_water_loop) when 'VAV PFP Boxes' chilled_water_loop = model_get_or_add_chilled_water_loop(model, cool_fuel, air_cooled = false) model_add_pvav_pfp_boxes(model, sys_name = nil, zones, hvac_op_sch = nil, oa_damper_sch = nil, vav_fan_efficiency = 0.62, vav_fan_motor_efficiency = 0.9, vav_fan_pressure_rise = OpenStudio.convert(4.0, 'inH_{2}O', 'Pa').get, chilled_water_loop) when 'Water Source Heat Pumps' condenser_loop = case main_heat_fuel when 'NaturalGas' model_get_or_add_heat_pump_loop(model) else model_get_or_add_ambient_water_loop(model) end model_add_water_source_hp(model, condenser_loop, zones, ventilation = false) when 'Ground Source Heat Pumps' # TODO: replace condenser loop w/ ground HX model # that does not involve district objects condenser_loop = model_get_or_add_ground_hx_loop(model) model_add_water_source_hp(model, condenser_loop, zones, ventilation = false) when 'DOAS' hot_water_loop = model_get_or_add_hot_water_loop(model, main_heat_fuel) chilled_water_loop = model_get_or_add_chilled_water_loop(model, cool_fuel, air_cooled = false) model_add_doas(model, sys_name = nil, hot_water_loop, chilled_water_loop, zones, hvac_op_sch = nil, oa_damper_sch = nil, fan_max_flow_rate = nil, economizer_control_type = 'FixedDryBulb', building_type = nil) when 'ERVs' model_add_zone_erv(model, zones) when 'Evaporative Cooler' model_add_evap_cooler(model, zones) when 'Ideal Air Loads' model_add_ideal_air_loads(model, zones) ### Combination Systems ### when 'Water Source Heat Pumps with ERVs' model_add_hvac_system(model, system_type = 'Water Source Heat Pumps', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) model_add_hvac_system(model, system_type = 'ERVs', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) when 'Water Source Heat Pumps with DOAS' model_add_hvac_system(model, system_type = 'Water Source Heat Pumps', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) model_add_hvac_system(model, system_type = 'DOAS', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) when 'Ground Source Heat Pumps with ERVs' model_add_hvac_system(model, system_type = 'Ground Source Heat Pumps', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) model_add_hvac_system(model, system_type = 'ERVs', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) when 'Ground Source Heat Pumps with DOAS' model_add_hvac_system(model, system_type = 'Ground Source Heat Pumps', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) model_add_hvac_system(model, system_type = 'DOAS', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) when 'Fan Coil with DOAS' model_add_hvac_system(model, system_type = 'Fan Coil', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) model_add_hvac_system(model, system_type = 'DOAS', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) when 'Fan Coil with ERVs' model_add_hvac_system(model, system_type = 'Fan Coil', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) model_add_hvac_system(model, system_type = 'ERVs', main_heat_fuel, zone_heat_fuel, cool_fuel, zones) else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "HVAC system type '#{system_type}' not recognized") return false end end |
#model_add_hw_loop(model, boiler_fuel_type, building_type = nil, ambient_loop = nil) ⇒ OpenStudio::Model::PlantLoop
Creates a hot water loop with a boiler, district heating, or a water-to-water heat pump and adds it to the model.
Only used when boiler_fuel_type is HeatPump.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 11 def model_add_hw_loop(model, boiler_fuel_type, building_type = nil, ambient_loop = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', 'Adding hot water loop.') # hot water loop hot_water_loop = OpenStudio::Model::PlantLoop.new(model) hot_water_loop.setName('Hot Water Loop') hot_water_loop.setMinimumLoopTemperature(10) # hot water loop controls # TODO: Yixing check other building types and add the parameter to the prototype input if more values comes out. hw_temp_f = if building_type == 'LargeHotel' 140 # HW setpoint 140F else 180 # HW setpoint 180F end hw_delta_t_r = 20 # 20F delta-T hw_temp_c = OpenStudio.convert(hw_temp_f, 'F', 'C').get hw_delta_t_k = OpenStudio.convert(hw_delta_t_r, 'R', 'K').get hw_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) hw_temp_sch.setName("Hot Water Loop Temp - #{hw_temp_f}F") hw_temp_sch.defaultDaySchedule.setName("Hot Water Loop Temp - #{hw_temp_f}F Default") hw_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), hw_temp_c) hw_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, hw_temp_sch) hw_stpt_manager.setName('Hot water loop setpoint manager') hw_stpt_manager.addToNode(hot_water_loop.supplyOutletNode) sizing_plant = hot_water_loop.sizingPlant sizing_plant.setLoopType('Heating') sizing_plant.setDesignLoopExitTemperature(hw_temp_c) sizing_plant.setLoopDesignTemperatureDifference(hw_delta_t_k) # hot water pump hw_pump = if building_type == 'Outpatient' OpenStudio::Model::PumpConstantSpeed.new(model) else OpenStudio::Model::PumpVariableSpeed.new(model) end hw_pump.setName('Hot Water Loop Pump') hw_pump_head_ft_h2o = 60.0 hw_pump_head_press_pa = OpenStudio.convert(hw_pump_head_ft_h2o, 'ftH_{2}O', 'Pa').get hw_pump.setRatedPumpHead(hw_pump_head_press_pa) hw_pump.setMotorEfficiency(0.9) hw_pump.setPumpControlType('Intermittent') hw_pump.addToNode(hot_water_loop.supplyInletNode) case boiler_fuel_type # District Heating when 'DistrictHeating' dist_ht = OpenStudio::Model::DistrictHeating.new(model) dist_ht.setName('Purchased Heating') dist_ht.autosizeNominalCapacity hot_water_loop.addSupplyBranchForComponent(dist_ht) # Ambient Loop when 'HeatPump' water_to_water_hp = OpenStudio::Model::HeatPumpWaterToWaterEquationFitHeating.new(model) hot_water_loop.addSupplyBranchForComponent(water_to_water_hp) # Get or add an ambient loop if ambient_loop.nil? ambient_loop = model_get_or_add_ambient_water_loop(model) end ambient_loop.addDemandBranchForComponent(water_to_water_hp) # Boiler when 'Electricity', 'NaturalGas', 'PropaneGas', 'FuelOil#1', 'FuelOil#2' boiler_max_t_f = 203 boiler_max_t_c = OpenStudio.convert(boiler_max_t_f, 'F', 'C').get boiler = OpenStudio::Model::BoilerHotWater.new(model) boiler.setName('Hot Water Loop Boiler') boiler.setEfficiencyCurveTemperatureEvaluationVariable('LeavingBoiler') boiler.setFuelType(boiler_fuel_type) boiler.setDesignWaterOutletTemperature(hw_temp_c) boiler.setNominalThermalEfficiency(0.78) boiler.setMaximumPartLoadRatio(1.2) boiler.setWaterOutletUpperTemperatureLimit(boiler_max_t_c) boiler.setBoilerFlowMode('LeavingSetpointModulated') hot_water_loop.addSupplyBranchForComponent(boiler) if building_type == 'LargeHotel' boiler.setEfficiencyCurveTemperatureEvaluationVariable('LeavingBoiler') boiler.setDesignWaterOutletTemperature(81) boiler.setMaximumPartLoadRatio(1.2) boiler.setSizingFactor(1.2) boiler.setWaterOutletUpperTemperatureLimit(95) end # TODO: Yixing. Add the temperature setpoint will cost the simulation with # thousands of Severe Errors. Need to figure this out later. # boiler_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(self,hw_temp_sch) # boiler_stpt_manager.setName("Boiler outlet setpoint manager") # boiler_stpt_manager.addToNode(boiler.outletModelObject.get.to_Node.get) else OpenStudio.logFree(OpenStudio::Error, 'openstudio.Model.Model', "Boiler fuel type #{boiler_fuel_type} is not valid, no boiler will be added.") end # hot water loop pipes boiler_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) hot_water_loop.addSupplyBranchForComponent(boiler_bypass_pipe) coil_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) hot_water_loop.addDemandBranchForComponent(coil_bypass_pipe) supply_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) supply_outlet_pipe.addToNode(hot_water_loop.supplyOutletNode) demand_inlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_inlet_pipe.addToNode(hot_water_loop.demandInletNode) demand_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_outlet_pipe.addToNode(hot_water_loop.demandOutletNode) return hot_water_loop end |
#model_add_ideal_air_loads(model, thermal_zones) ⇒ Array<OpenStudio::Model::ZoneHVACIdealLoadsAirSystem>
review the default ventilation settings
Adds ideal air loads systems for each zone.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5564 def model_add_ideal_air_loads(model, thermal_zones) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding ideal air loads for #{thermal_zones.size} zones.") ideal_systems = [] thermal_zones.each do |zone| ideal_loads = OpenStudio::Model::ZoneHVACIdealLoadsAirSystem.new(model) ideal_loads.addToThermalZone(zone) ideal_systems << ideal_loads end return ideal_systems end |
#model_add_material(model, material_name) ⇒ Object
make return an OptionalMaterial
Create a material from the openstudio standards dataset.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2287 def model_add_material(model, material_name) # First check model and return material if it already exists model.getMaterials.sort.each do |material| if material.name.get.to_s == material_name OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "Already added material: #{material_name}") return material end end # OpenStudio::logFree(OpenStudio::Info, 'openstudio.standards.Model', "Adding material: #{material_name}") # Get the object data data = model_find_object(standards_data['materials'], 'name' => material_name) unless data OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Model', "Cannot find data for material: #{material_name}, will not be created.") return false # TODO: change to return empty optional material end material = nil material_type = data['material_type'] if material_type == 'StandardOpaqueMaterial' material = OpenStudio::Model::StandardOpaqueMaterial.new(model) material.setName(material_name) material.setRoughness(data['roughness'].to_s) material.setThickness(OpenStudio.convert(data['thickness'].to_f, 'in', 'm').get) material.setConductivity(OpenStudio.convert(data['conductivity'].to_f, 'Btu*in/hr*ft^2*R', 'W/m*K').get) material.setDensity(OpenStudio.convert(data['density'].to_f, 'lb/ft^3', 'kg/m^3').get) material.setSpecificHeat(OpenStudio.convert(data['specific_heat'].to_f, 'Btu/lb*R', 'J/kg*K').get) material.setThermalAbsorptance(data['thermal_absorptance'].to_f) material.setSolarAbsorptance(data['solar_absorptance'].to_f) material.setVisibleAbsorptance(data['visible_absorptance'].to_f) elsif material_type == 'MasslessOpaqueMaterial' material = OpenStudio::Model::MasslessOpaqueMaterial.new(model) material.setName(material_name) material.setThermalResistance(OpenStudio.convert(data['resistance'].to_f, 'hr*ft^2*R/Btu', 'm^2*K/W').get) material.setConductivity(OpenStudio.convert(data['conductivity'].to_f, 'Btu*in/hr*ft^2*R', 'W/m*K').get) material.setDensity(OpenStudio.convert(data['density'].to_f, 'lb/ft^3', 'kg/m^3').get) material.setSpecificHeat(OpenStudio.convert(data['specific_heat'].to_f, 'Btu/lb*R', 'J/kg*K').get) material.setThermalAbsorptance(data['thermal_absorptance'].to_f) material.setSolarAbsorptance(data['solar_absorptance'].to_f) material.setVisibleAbsorptance(data['visible_absorptance'].to_f) elsif material_type == 'AirGap' material = OpenStudio::Model::AirGap.new(model) material.setName(material_name) material.setThermalResistance(OpenStudio.convert(data['resistance'].to_f, 'hr*ft^2*R/Btu*in', 'm*K/W').get) elsif material_type == 'Gas' material = OpenStudio::Model::Gas.new(model) material.setName(material_name) material.setThickness(OpenStudio.convert(data['thickness'].to_f, 'in', 'm').get) material.setGasType(data['gas_type'].to_s) elsif material_type == 'SimpleGlazing' material = OpenStudio::Model::SimpleGlazing.new(model) material.setName(material_name) material.setUFactor(OpenStudio.convert(data['u_factor'].to_f, 'Btu/hr*ft^2*R', 'W/m^2*K').get) material.setSolarHeatGainCoefficient(data['solar_heat_gain_coefficient'].to_f) material.setVisibleTransmittance(data['visible_transmittance'].to_f) elsif material_type == 'StandardGlazing' material = OpenStudio::Model::StandardGlazing.new(model) material.setName(material_name) material.setOpticalDataType(data['optical_data_type'].to_s) material.setThickness(OpenStudio.convert(data['thickness'].to_f, 'in', 'm').get) material.setSolarTransmittanceatNormalIncidence(data['solar_transmittance_at_normal_incidence'].to_f) material.setFrontSideSolarReflectanceatNormalIncidence(data['front_side_solar_reflectance_at_normal_incidence'].to_f) material.setBackSideSolarReflectanceatNormalIncidence(data['back_side_solar_reflectance_at_normal_incidence'].to_f) material.setVisibleTransmittanceatNormalIncidence(data['visible_transmittance_at_normal_incidence'].to_f) material.setFrontSideVisibleReflectanceatNormalIncidence(data['front_side_visible_reflectance_at_normal_incidence'].to_f) material.setBackSideVisibleReflectanceatNormalIncidence(data['back_side_visible_reflectance_at_normal_incidence'].to_f) material.setInfraredTransmittanceatNormalIncidence(data['infrared_transmittance_at_normal_incidence'].to_f) material.setFrontSideInfraredHemisphericalEmissivity(data['front_side_infrared_hemispherical_emissivity'].to_f) material.setBackSideInfraredHemisphericalEmissivity(data['back_side_infrared_hemispherical_emissivity'].to_f) material.setConductivity(OpenStudio.convert(data['conductivity'].to_f, 'Btu*in/hr*ft^2*R', 'W/m*K').get) material.setDirtCorrectionFactorforSolarandVisibleTransmittance(data['dirt_correction_factor_for_solar_and_visible_transmittance'].to_f) if /true/i =~ data['solar_diffusing'].to_s material.setSolarDiffusing(true) else material.setSolarDiffusing(false) end else puts "Unknown material type #{material_type}" exit end return material end |
#model_add_prm_baseline_system(model, system_type, main_heat_fuel, zone_heat_fuel, cool_fuel, zones) ⇒ Object
add 90.1-2013 systems 11-13
Add the specified baseline system type to the specified zons based on the specified template. For some multi-zone system types, the standards require identifying zones whose loads or schedules are outliers and putting these systems on separate single-zone systems. This method does that.
PTHP, PTAC, PSZ_AC, PSZ_HP, PVAV_Reheat, PVAV_PFP_Boxes, VAV_Reheat, VAV_PFP_Boxes, Gas_Furnace, Electric_Furnace, which are also returned by the method OpenStudio::Model::Model.prm_baseline_system_type. Electricity, NaturalGas, DistrictHeating Electricity, NaturalGas, DistrictHeating Electricity, DistrictCooling
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 771 def model_add_prm_baseline_system(model, system_type, main_heat_fuel, zone_heat_fuel, cool_fuel, zones) case system_type when 'PTAC' # System 1 unless zones.empty? # Retrieve the existing hot water loop # or add a new one if necessary. hot_water_loop = nil hot_water_loop = if model.getPlantLoopByName('Hot Water Loop').is_initialized model.getPlantLoopByName('Hot Water Loop').get else model_add_hw_loop(model, main_heat_fuel) end # Add a hot water PTAC to each zone model_add_ptac(model, nil, hot_water_loop, zones, 'ConstantVolume', 'Water', 'Single Speed DX AC') end when 'PTHP' # System 2 unless zones.empty? # Add an air-source packaged terminal # heat pump with electric supplemental heat # to each zone. model_add_pthp(model, nil, zones, 'ConstantVolume') end when 'PSZ_AC' # System 3 unless zones.empty? heating_type = 'Gas' # If district heating hot_water_loop = nil if main_heat_fuel == 'DistrictHeating' heating_type = 'Water' hot_water_loop = if model.getPlantLoopByName('Hot Water Loop').is_initialized model.getPlantLoopByName('Hot Water Loop').get else model_add_hw_loop(model, main_heat_fuel) end end cooling_type = 'Single Speed DX AC' # If district cooling chilled_water_loop = nil if cool_fuel == 'DistrictCooling' cooling_type = 'Water' chilled_water_loop = if model.getPlantLoopByName('Chilled Water Loop').is_initialized model.getPlantLoopByName('Chilled Water Loop').get else model_add_chw_loop(model, 'const_pri', chiller_cooling_type = nil, chiller_condenser_type = nil, chiller_compressor_type = nil, cool_fuel, condenser_water_loop = nil, building_type = nil) end end # Add a gas-fired PSZ-AC to each zone # hvac_op_sch=nil means always on # oa_damper_sch to nil means always open model_add_psz_ac(model, sys_name = nil, hot_water_loop, chilled_water_loop, zones, hvac_op_sch = nil, oa_damper_sch = nil, fan_location = 'DrawThrough', fan_type = 'ConstantVolume', heating_type, supplemental_heating_type = 'Gas', # Should we really add supplemental heating here? cooling_type, building_type = nil) end when 'PSZ_HP' # System 4 unless zones.empty? # Add an air-source packaged single zone # heat pump with electric supplemental heat # to each zone. model_add_psz_ac(model, 'PSZ-HP', nil, nil, zones, nil, nil, 'DrawThrough', 'ConstantVolume', 'Single Speed Heat Pump', 'Electric', 'Single Speed Heat Pump', building_type = nil) end when 'PVAV_Reheat' # System 5 # Retrieve the existing hot water loop # or add a new one if necessary. hot_water_loop = nil hot_water_loop = if model.getPlantLoopByName('Hot Water Loop').is_initialized model.getPlantLoopByName('Hot Water Loop').get else model_add_hw_loop(model, main_heat_fuel) end # If district cooling chilled_water_loop = nil if cool_fuel == 'DistrictCooling' chilled_water_loop = if model.getPlantLoopByName('Chilled Water Loop').is_initialized model.getPlantLoopByName('Chilled Water Loop').get else model_add_chw_loop(model, 'const_pri', chiller_cooling_type = nil, chiller_condenser_type = nil, chiller_compressor_type = nil, cool_fuel, condenser_water_loop = nil, building_type = nil) end end # If electric zone heat electric_reheat = false if zone_heat_fuel == 'Electricity' electric_reheat = true end # Group zones by story story_zone_lists = model_group_zones_by_story(model, zones) # For the array of zones on each story, # separate the primary zones from the secondary zones. # Add the baseline system type to the primary zones # and add the suplemental system type to the secondary zones. story_zone_lists.each do |story_group| # Differentiate primary and secondary zones pri_sec_zone_lists = model_differentiate_primary_secondary_thermal_zones(model, story_group) pri_zones = pri_sec_zone_lists['primary'] sec_zones = pri_sec_zone_lists['secondary'] # Add a PVAV with Reheat for the primary zones stories = [] story_group[0].spaces.each do |space| stories << [space.buildingStory.get.name.get, building_story_minimum_z_value(space.buildingStory.get)] end story_name = stories.sort_by { |nm, z| z }[0][0] sys_name = "#{story_name} PVAV_Reheat (Sys5)" # If and only if there are primary zones to attach to the loop # counter example: floor with only one elevator machine room that get classified as sec_zones unless pri_zones.empty? model_add_pvav(model, sys_name, pri_zones, nil, nil, electric_reheat, hot_water_loop, chilled_water_loop, nil, nil) end # Add a PSZ_AC for each secondary zone unless sec_zones.empty? model_add_prm_baseline_system(model, 'PSZ_AC', main_heat_fuel, zone_heat_fuel, cool_fuel, sec_zones) end end when 'PVAV_PFP_Boxes' # System 6 # If district cooling chilled_water_loop = nil if cool_fuel == 'DistrictCooling' chilled_water_loop = if model.getPlantLoopByName('Chilled Water Loop').is_initialized model.getPlantLoopByName('Chilled Water Loop').get else model_add_chw_loop(model, 'const_pri', chiller_cooling_type = nil, chiller_condenser_type = nil, chiller_compressor_type = nil, cool_fuel, condenser_water_loop = nil, building_type = nil) end end # Group zones by story story_zone_lists = model_group_zones_by_story(model, zones) # For the array of zones on each story, # separate the primary zones from the secondary zones. # Add the baseline system type to the primary zones # and add the suplemental system type to the secondary zones. story_zone_lists.each do |story_group| # Differentiate primary and secondary zones pri_sec_zone_lists = model_differentiate_primary_secondary_thermal_zones(model, story_group) pri_zones = pri_sec_zone_lists['primary'] sec_zones = pri_sec_zone_lists['secondary'] # Add an VAV for the primary zones stories = [] story_group[0].spaces.each do |space| stories << [space.buildingStory.get.name.get, building_story_minimum_z_value(space.buildingStory.get)] end story_name = stories.sort_by { |nm, z| z }[0][0] sys_name = "#{story_name} PVAV_PFP_Boxes (Sys6)" # If and only if there are primary zones to attach to the loop unless pri_zones.empty? model_add_pvav_pfp_boxes(model, sys_name, pri_zones, nil, nil, 0.62, 0.9, OpenStudio.convert(4.0, 'inH_{2}O', 'Pa').get, chilled_water_loop, nil) end # Add a PSZ_HP for each secondary zone unless sec_zones.empty? model_add_prm_baseline_system(model, 'PSZ_HP', main_heat_fuel, zone_heat_fuel, cool_fuel, sec_zones) end end when 'VAV_Reheat' # System 7 # Retrieve the existing hot water loop # or add a new one if necessary. hot_water_loop = nil hot_water_loop = if model.getPlantLoopByName('Hot Water Loop').is_initialized model.getPlantLoopByName('Hot Water Loop').get else model_add_hw_loop(model, main_heat_fuel) end # Retrieve the existing chilled water loop # or add a new one if necessary. chilled_water_loop = nil if model.getPlantLoopByName('Chilled Water Loop').is_initialized chilled_water_loop = model.getPlantLoopByName('Chilled Water Loop').get else if cool_fuel == 'DistrictCooling' chilled_water_loop = model_add_chw_loop(model, 'const_pri', chiller_cooling_type = nil, chiller_condenser_type = nil, chiller_compressor_type = nil, cool_fuel, condenser_water_loop = nil, building_type = nil) else fan_type = model_cw_loop_cooling_tower_fan_type(model) condenser_water_loop = model_add_cw_loop(model, 'Open Cooling Tower', 'Propeller or Axial', fan_type, 1, 1, nil) chilled_water_loop = model_add_chw_loop(model, 'const_pri_var_sec', 'WaterCooled', chiller_condenser_type = nil, 'Rotary Screw', cooling_fuel = nil, condenser_water_loop, building_type = nil) end end # If electric zone heat reheat_type = 'Water' if zone_heat_fuel == 'Electricity' reheat_type = 'Electricity' end # Group zones by story story_zone_lists = model_group_zones_by_story(model, zones) # For the array of zones on each story, # separate the primary zones from the secondary zones. # Add the baseline system type to the primary zones # and add the suplemental system type to the secondary zones. story_zone_lists.each do |story_group| # The model_group_zones_by_story(model) NO LONGER returns empty lists when a given floor doesn't have any of the zones # So NO need to filter it out otherwise you get an error undefined method `spaces' for nil:NilClass # next if zones.empty? # Differentiate primary and secondary zones pri_sec_zone_lists = model_differentiate_primary_secondary_thermal_zones(model, story_group) pri_zones = pri_sec_zone_lists['primary'] sec_zones = pri_sec_zone_lists['secondary'] # Add a VAV for the primary zones stories = [] story_group[0].spaces.each do |space| stories << [space.buildingStory.get.name.get, building_story_minimum_z_value(space.buildingStory.get)] end story_name = stories.sort_by { |nm, z| z }[0][0] sys_name = "#{story_name} VAV_Reheat (Sys7)" # If and only if there are primary zones to attach to the loop # counter example: floor with only one elevator machine room that get classified as sec_zones unless pri_zones.empty? model_add_vav_reheat(model, sys_name, hot_water_loop, chilled_water_loop, pri_zones, nil, nil, 0.62, 0.9, OpenStudio.convert(4.0, 'inH_{2}O', 'Pa').get, nil, reheat_type, nil) end # Add a PSZ_AC for each secondary zone unless sec_zones.empty? model_add_prm_baseline_system(model, 'PSZ_AC', main_heat_fuel, zone_heat_fuel, cool_fuel, sec_zones) end end when 'VAV_PFP_Boxes' # System 8 # Retrieve the existing chilled water loop # or add a new one if necessary. chilled_water_loop = nil if model.getPlantLoopByName('Chilled Water Loop').is_initialized chilled_water_loop = model.getPlantLoopByName('Chilled Water Loop').get else if cool_fuel == 'DistrictCooling' chilled_water_loop = model_add_chw_loop(model, 'const_pri', chiller_cooling_type = nil, chiller_condenser_type = nil, chiller_compressor_type = nil, cool_fuel, condenser_water_loop = nil, building_type = nil) else fan_type = model_cw_loop_cooling_tower_fan_type(model) condenser_water_loop = model_add_cw_loop(model, 'Open Cooling Tower', 'Propeller or Axial', fan_type, 1, 1, nil) chilled_water_loop = model_add_chw_loop(model, 'const_pri_var_sec', 'WaterCooled', chiller_condenser_type = nil, 'Rotary Screw', cool_fueling = nil, condenser_water_loop, building_type = nil) end end # Group zones by story story_zone_lists = model_group_zones_by_story(model, zones) # For the array of zones on each story, # separate the primary zones from the secondary zones. # Add the baseline system type to the primary zones # and add the suplemental system type to the secondary zones. story_zone_lists.each do |story_group| # Differentiate primary and secondary zones pri_sec_zone_lists = model_differentiate_primary_secondary_thermal_zones(model, story_group) pri_zones = pri_sec_zone_lists['primary'] sec_zones = pri_sec_zone_lists['secondary'] # Add an VAV for the primary zones stories = [] story_group[0].spaces.each do |space| stories << [space.buildingStory.get.name.get, building_story_minimum_z_value(space.buildingStory.get)] end story_name = stories.sort_by { |nm, z| z }[0][0] sys_name = "#{story_name} VAV_PFP_Boxes (Sys8)" # If and only if there are primary zones to attach to the loop unless pri_zones.empty? model_add_vav_pfp_boxes(model, sys_name, chilled_water_loop, pri_zones, nil, nil, 0.62, 0.9, OpenStudio.convert(4.0, 'inH_{2}O', 'Pa').get) end # Add a PSZ_HP for each secondary zone unless sec_zones.empty? model_add_prm_baseline_system(model, 'PSZ_HP', main_heat_fuel, zone_heat_fuel, cool_fuel, sec_zones) end end when 'Gas_Furnace' # System 9 unless zones.empty? # If district heating hot_water_loop = nil if main_heat_fuel == 'DistrictHeating' hot_water_loop = if model.getPlantLoopByName('Hot Water Loop').is_initialized model.getPlantLoopByName('Hot Water Loop').get else model_add_hw_loop(model, main_heat_fuel) end end # Add a System 9 - Gas Unit Heater to each zone model_add_unitheater(model, nil, zones, nil, 'ConstantVolume', OpenStudio.convert(0.2, 'inH_{2}O', 'Pa').get, main_heat_fuel, hot_water_loop, nil) end when 'Electric_Furnace' # System 10 unless zones.empty? # Add a System 10 - Electric Unit Heater to each zone model_add_unitheater(model, nil, zones, nil, 'ConstantVolume', OpenStudio.convert(0.2, 'inH_{2}O', 'Pa').get, main_heat_fuel, nil, nil) end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "System type #{system_type} is not a valid choice, nothing will be added to the model.") return false end return true end |
#model_add_prm_construction_set(model, category) ⇒ OpenStudio::Model::DefaultConstructionSet
Creates a construction set with the construction types specified in the Performance Rating Method (aka Appendix G aka LEED) and adds it to the model. This method creates and adds the constructions and their materials as well.
Valid choices are Nonresidential, Residential, and Semiheated construction set populated with the specified constructions.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1617 def model_add_prm_construction_set(model, category) construction_set = OpenStudio::Model::OptionalDefaultConstructionSet.new # Find the climate zone set that this climate zone falls into climate_zone_set = model_find_climate_zone_set(model, clim) unless climate_zone_set return construction_set end # Get the object data data = model_find_object(standards_data['construction_sets'], 'template' => template, 'climate_zone_set' => climate_zone_set, 'building_type' => building_type, 'space_type' => spc_type, 'is_residential' => is_residential) unless data data = model_find_object(standards_data['construction_sets'], 'template' => template, 'climate_zone_set' => climate_zone_set, 'building_type' => building_type, 'space_type' => spc_type) unless data return construction_set end end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "Adding construction set: #{template}-#{clim}-#{building_type}-#{spc_type}-is_residential#{is_residential}") name = model_make_name(model, clim, building_type, spc_type) # Create a new construction set and name it construction_set = OpenStudio::Model::DefaultConstructionSet.new(model) construction_set.setName(name) # Specify the types of constructions # Exterior surfaces constructions exterior_floor_standards_construction_type = 'SteelFramed' exterior_wall_standards_construction_type = 'SteelFramed' exterior_roof_standards_construction_type = 'IEAD' # Ground contact surfaces constructions ground_contact_floor_standards_construction_type = 'Unheated' ground_contact_wall_standards_construction_type = 'Mass' # Exterior sub surfaces constructions exterior_fixed_window_standards_construction_type = 'IEAD' exterior_operable_window_standards_construction_type = 'IEAD' exterior_door_standards_construction_type = 'IEAD' exterior_overhead_door_standards_construction_type = 'IEAD' exterior_skylight_standards_construction_type = 'IEAD' # Exterior surfaces constructions exterior_surfaces = OpenStudio::Model::DefaultSurfaceConstructions.new(model) construction_set.setDefaultExteriorSurfaceConstructions(exterior_surfaces) exterior_surfaces.setFloorConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorFloor', exterior_floor_standards_construction_type, category)) exterior_surfaces.setWallConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorWall', exterior_wall_standards_construction_type, category)) exterior_surfaces.setRoofCeilingConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorRoof', exterior_roof_standards_construction_type, category)) # Interior surfaces constructions interior_surfaces = OpenStudio::Model::DefaultSurfaceConstructions.new(model) construction_set.setDefaultInteriorSurfaceConstructions(interior_surfaces) construction_name = interior_floors unless construction_name.nil? interior_surfaces.setFloorConstruction(model_add_construction(model, construction_name)) end construction_name = interior_walls unless construction_name.nil? interior_surfaces.setWallConstruction(model_add_construction(model, construction_name)) end construction_name = interior_ceilings unless construction_name.nil? interior_surfaces.setRoofCeilingConstruction(model_add_construction(model, construction_name)) end # Ground contact surfaces constructions ground_surfaces = OpenStudio::Model::DefaultSurfaceConstructions.new(model) construction_set.setDefaultGroundContactSurfaceConstructions(ground_surfaces) ground_surfaces.setFloorConstruction(model_find_and_add_construction(model, climate_zone_set, 'GroundContactFloor', ground_contact_floor_standards_construction_type, category)) ground_surfaces.setWallConstruction(model_find_and_add_construction(model, climate_zone_set, 'GroundContactWall', ground_contact_wall_standards_construction_type, category)) # Exterior sub surfaces constructions exterior_subsurfaces = OpenStudio::Model::DefaultSubSurfaceConstructions.new(model) construction_set.setDefaultExteriorSubSurfaceConstructions(exterior_subsurfaces) if exterior_fixed_window_standards_construction_type && exterior_fixed_window_building_category exterior_subsurfaces.setFixedWindowConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorWindow', exterior_fixed_window_standards_construction_type, category)) end if exterior_operable_window_standards_construction_type && exterior_operable_window_building_category exterior_subsurfaces.setOperableWindowConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorWindow', exterior_operable_window_standards_construction_type, category)) end if exterior_door_standards_construction_type && exterior_door_building_category exterior_subsurfaces.setDoorConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorDoor', exterior_door_standards_construction_type, category)) end construction_name = exterior_glass_doors unless construction_name.nil? exterior_subsurfaces.setGlassDoorConstruction(model_add_construction(model, construction_name)) end if exterior_overhead_door_standards_construction_type && exterior_overhead_door_building_category exterior_subsurfaces.setOverheadDoorConstruction(model_find_and_add_construction(model, climate_zone_set, 'ExteriorDoor', exterior_overhead_door_standards_construction_type, category)) end if exterior_skylight_standards_construction_type && exterior_skylight_building_category exterior_subsurfaces.setSkylightConstruction(model_find_and_add_construction(model, climate_zone_set, 'Skylight', exterior_skylight_standards_construction_type, category)) end if construction_name == tubular_daylight_domes exterior_subsurfaces.setTubularDaylightDomeConstruction(model_add_construction(model, construction_name)) end if construction_name == tubular_daylight_diffusers exterior_subsurfaces.setTubularDaylightDiffuserConstruction(model_add_construction(model, construction_name)) end # Interior sub surfaces constructions interior_subsurfaces = OpenStudio::Model::DefaultSubSurfaceConstructions.new(model) construction_set.setDefaultInteriorSubSurfaceConstructions(interior_subsurfaces) if construction_name == interior_fixed_windows interior_subsurfaces.setFixedWindowConstruction(model_add_construction(model, construction_name)) end if construction_name == interior_operable_windows interior_subsurfaces.setOperableWindowConstruction(model_add_construction(model, construction_name)) end if construction_name == interior_doors interior_subsurfaces.setDoorConstruction(model_add_construction(model, construction_name)) end # Other constructions if construction_name == interior_partitions construction_set.setInteriorPartitionConstruction(model_add_construction(model, construction_name)) end if construction_name == space_shading construction_set.setSpaceShadingConstruction(model_add_construction(model, construction_name)) end if construction_name == building_shading construction_set.setBuildingShadingConstruction(model_add_construction(model, construction_name)) end if construction_name == site_shading construction_set.setSiteShadingConstruction(model_add_construction(model, construction_name)) end # componentize the construction set # construction_set_component = construction_set.createComponent # Return the construction set return OpenStudio::Model::OptionalDefaultConstructionSet.new(construction_set) # Create a constuction set that is all end |
#model_add_psz_ac(model, sys_name, hot_water_loop, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, fan_location, fan_type, heating_type, supplemental_heating_type, cooling_type, building_type = nil) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Creates a PSZ-AC system for each zone and adds it to the model.
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open Single Speed Heat Pump, Water To Air Heat Pump Single Speed DX AC, Single Speed Heat Pump, Water To Air Heat Pump Todo: clarify where these default curves coefficients are coming from Todo: I (jmarrec) believe it is the DOE Ref curves (“DOE Ref DX Clg Coil Cool-Cap-fT”)
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 1718 def model_add_psz_ac(model, sys_name, hot_water_loop, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, fan_location, fan_type, heating_type, supplemental_heating_type, cooling_type, building_type = nil) hw_temp_f = 180 # HW setpoint 180F hw_delta_t_r = 20 # 20F delta-T hw_temp_c = OpenStudio.convert(hw_temp_f, 'F', 'C').get hw_delta_t_k = OpenStudio.convert(hw_delta_t_r, 'R', 'K').get # control temps used across all air handlers clg_sa_temp_f = 55 # Central deck clg temp 55F prehtg_sa_temp_f = 44.6 # Preheat to 44.6F htg_sa_temp_f = 55 # Central deck htg temp 55F rht_sa_temp_f = 104 # VAV box reheat to 104F clg_sa_temp_c = OpenStudio.convert(clg_sa_temp_f, 'F', 'C').get prehtg_sa_temp_c = OpenStudio.convert(prehtg_sa_temp_f, 'F', 'C').get htg_sa_temp_c = OpenStudio.convert(htg_sa_temp_f, 'F', 'C').get rht_sa_temp_c = OpenStudio.convert(rht_sa_temp_f, 'F', 'C').get # hvac operation schedule hvac_op_sch = if hvac_op_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, hvac_op_sch) end # oa damper schedule oa_damper_sch = if oa_damper_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, oa_damper_sch) end # Make a PSZ-AC for each zone air_loops = [] thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding PSZ-AC for #{zone.name}.") air_loop = OpenStudio::Model::AirLoopHVAC.new(model) if sys_name.nil? air_loop.setName("#{zone.name} PSZ-AC") else air_loop.setName("#{zone.name} #{sys_name}") end air_loop.setAvailabilitySchedule(hvac_op_sch) air_loops << air_loop # When an air_loop is contructed, its constructor creates a sizing:system object # the default sizing:system contstructor makes a system:sizing object # appropriate for a multizone VAV system # this systems is a constant volume system with no VAV terminals, # and therfore needs different default settings air_loop_sizing = air_loop.sizingSystem # TODO units air_loop_sizing.setTypeofLoadtoSizeOn('Sensible') air_loop_sizing.autosizeDesignOutdoorAirFlowRate air_loop_sizing.setMinimumSystemAirFlowRatio(1.0) air_loop_sizing.setPreheatDesignTemperature(7.0) air_loop_sizing.setPreheatDesignHumidityRatio(0.008) air_loop_sizing.setPrecoolDesignTemperature(12.8) air_loop_sizing.setPrecoolDesignHumidityRatio(0.008) air_loop_sizing.setCentralCoolingDesignSupplyAirTemperature(12.8) air_loop_sizing.setCentralHeatingDesignSupplyAirTemperature(40.0) air_loop_sizing.setSizingOption('Coincident') air_loop_sizing.setAllOutdoorAirinCooling(false) air_loop_sizing.setAllOutdoorAirinHeating(false) air_loop_sizing.setCentralCoolingDesignSupplyAirHumidityRatio(0.0085) air_loop_sizing.setCentralHeatingDesignSupplyAirHumidityRatio(0.0080) air_loop_sizing.setCoolingDesignAirFlowMethod('DesignDay') air_loop_sizing.setCoolingDesignAirFlowRate(0.0) air_loop_sizing.setHeatingDesignAirFlowMethod('DesignDay') air_loop_sizing.setHeatingDesignAirFlowRate(0.0) air_loop_sizing.setSystemOutdoorAirMethod('ZoneSum') # Zone sizing sizing_zone = zone.sizingZone sizing_zone.setZoneCoolingDesignSupplyAirTemperature(12.8) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(40.0) # Add a setpoint manager single zone reheat to control the # supply air temperature based on the needs of this zone setpoint_mgr_single_zone_reheat = OpenStudio::Model::SetpointManagerSingleZoneReheat.new(model) setpoint_mgr_single_zone_reheat.setControlZone(zone) fan = nil # ConstantVolume: Packaged Rooftop Single Zone Air conditioner; # Cycling: Unitary System; # CyclingHeatPump: Unitary Heat Pump system if fan_type == 'ConstantVolume' fan = OpenStudio::Model::FanConstantVolume.new(model, hvac_op_sch) fan.setName("#{air_loop.name} Fan") fan_static_pressure_in_h2o = 2.5 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan.setPressureRise(fan_static_pressure_pa) fan.setFanEfficiency(0.54) fan.setMotorEfficiency(0.90) elsif fan_type == 'Cycling' fan = OpenStudio::Model::FanOnOff.new(model, hvac_op_sch) # Set fan op sch manually since fwd translator doesn't fan.setName("#{air_loop.name} Fan") fan_static_pressure_in_h2o = 2.5 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan.setPressureRise(fan_static_pressure_pa) fan.setFanEfficiency(0.54) fan.setMotorEfficiency(0.90) else OpenStudio.logFree(OpenStudio::Error, 'openstudio.Model.Model', "Fan type '#{fan_type}' not recognized, cannot add PSZ-AC.") return [] end htg_coil = nil case heating_type when 'NaturalGas', 'Gas' htg_coil = OpenStudio::Model::CoilHeatingGas.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{air_loop.name} Gas Htg Coil") when nil # Zero-capacity, always-off electric heating coil htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOffDiscreteSchedule) htg_coil.setName("#{air_loop.name} No Heat") htg_coil.setNominalCapacity(0) when 'Water' if hot_water_loop.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Model', 'No hot water plant loop supplied') return false end htg_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{air_loop.name} Water Htg Coil") htg_coil.setRatedInletWaterTemperature(hw_temp_c) htg_coil.setRatedInletAirTemperature(prehtg_sa_temp_c) htg_coil.setRatedOutletWaterTemperature(hw_temp_c - hw_delta_t_k) htg_coil.setRatedOutletAirTemperature(htg_sa_temp_c) hot_water_loop.addDemandBranchForComponent(htg_coil) when 'Single Speed Heat Pump' htg_cap_f_of_temp = OpenStudio::Model::CurveCubic.new(model) htg_cap_f_of_temp.setCoefficient1Constant(0.758746) htg_cap_f_of_temp.setCoefficient2x(0.027626) htg_cap_f_of_temp.setCoefficient3xPOW2(0.000148716) htg_cap_f_of_temp.setCoefficient4xPOW3(0.0000034992) htg_cap_f_of_temp.setMinimumValueofx(-20.0) htg_cap_f_of_temp.setMaximumValueofx(20.0) htg_cap_f_of_flow = OpenStudio::Model::CurveCubic.new(model) htg_cap_f_of_flow.setCoefficient1Constant(0.84) htg_cap_f_of_flow.setCoefficient2x(0.16) htg_cap_f_of_flow.setCoefficient3xPOW2(0.0) htg_cap_f_of_flow.setCoefficient4xPOW3(0.0) htg_cap_f_of_flow.setMinimumValueofx(0.5) htg_cap_f_of_flow.setMaximumValueofx(1.5) htg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveCubic.new(model) htg_energy_input_ratio_f_of_temp.setCoefficient1Constant(1.19248) htg_energy_input_ratio_f_of_temp.setCoefficient2x(-0.0300438) htg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(0.00103745) htg_energy_input_ratio_f_of_temp.setCoefficient4xPOW3(-0.000023328) htg_energy_input_ratio_f_of_temp.setMinimumValueofx(-20.0) htg_energy_input_ratio_f_of_temp.setMaximumValueofx(20.0) htg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) htg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.3824) htg_energy_input_ratio_f_of_flow.setCoefficient2x(-0.4336) htg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.0512) htg_energy_input_ratio_f_of_flow.setMinimumValueofx(0.0) htg_energy_input_ratio_f_of_flow.setMaximumValueofx(1.0) htg_part_load_fraction = OpenStudio::Model::CurveQuadratic.new(model) htg_part_load_fraction.setCoefficient1Constant(0.85) htg_part_load_fraction.setCoefficient2x(0.15) htg_part_load_fraction.setCoefficient3xPOW2(0.0) htg_part_load_fraction.setMinimumValueofx(0.0) htg_part_load_fraction.setMaximumValueofx(1.0) htg_coil = OpenStudio::Model::CoilHeatingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, htg_cap_f_of_temp, htg_cap_f_of_flow, htg_energy_input_ratio_f_of_temp, htg_energy_input_ratio_f_of_flow, htg_part_load_fraction) htg_coil.setName("#{air_loop.name} HP Htg Coil") htg_coil.setRatedCOP(3.3) # TODO: add this to standards htg_coil.setMinimumOutdoorDryBulbTemperatureforCompressorOperation(-12.2) htg_coil.setMaximumOutdoorDryBulbTemperatureforDefrostOperation(1.67) htg_coil.setCrankcaseHeaterCapacity(50.0) htg_coil.setMaximumOutdoorDryBulbTemperatureforCrankcaseHeaterOperation(4.4) htg_coil.setDefrostStrategy('ReverseCycle') htg_coil.setDefrostControl('OnDemand') def_eir_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) def_eir_f_of_temp.setCoefficient1Constant(0.297145) def_eir_f_of_temp.setCoefficient2x(0.0430933) def_eir_f_of_temp.setCoefficient3xPOW2(-0.000748766) def_eir_f_of_temp.setCoefficient4y(0.00597727) def_eir_f_of_temp.setCoefficient5yPOW2(0.000482112) def_eir_f_of_temp.setCoefficient6xTIMESY(-0.000956448) def_eir_f_of_temp.setMinimumValueofx(12.77778) def_eir_f_of_temp.setMaximumValueofx(23.88889) def_eir_f_of_temp.setMinimumValueofy(21.11111) def_eir_f_of_temp.setMaximumValueofy(46.11111) htg_coil.setDefrostEnergyInputRatioFunctionofTemperatureCurve(def_eir_f_of_temp) when 'Water To Air Heat Pump' if hot_water_loop.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Model', 'No hot water plant loop supplied') return false end htg_coil = OpenStudio::Model::CoilHeatingWaterToAirHeatPumpEquationFit.new(model) htg_coil.setName("#{air_loop.name} Water-to-Air HP Htg Coil") htg_coil.setRatedHeatingCoefficientofPerformance(4.2) # TODO: add this to standards htg_coil.setHeatingCapacityCoefficient1(0.237847462869254) htg_coil.setHeatingCapacityCoefficient2(-3.35823796081626) htg_coil.setHeatingCapacityCoefficient3(3.80640467406376) htg_coil.setHeatingCapacityCoefficient4(0.179200417311554) htg_coil.setHeatingCapacityCoefficient5(0.12860719846082) htg_coil.setHeatingPowerConsumptionCoefficient1(-3.79175529243238) htg_coil.setHeatingPowerConsumptionCoefficient2(3.38799239505527) htg_coil.setHeatingPowerConsumptionCoefficient3(1.5022612076303) htg_coil.setHeatingPowerConsumptionCoefficient4(-0.177653510577989) htg_coil.setHeatingPowerConsumptionCoefficient5(-0.103079864171839) hot_water_loop.addDemandBranchForComponent(htg_coil) when 'Electricity', 'Electric' htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{air_loop.name} Electric Htg Coil") end supplemental_htg_coil = nil case supplemental_heating_type when 'Electricity', 'Electric' # TODO: change spreadsheet to Electricity supplemental_htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) supplemental_htg_coil.setName("#{air_loop.name} Electric Backup Htg Coil") when 'NaturalGas', 'Gas' supplemental_htg_coil = OpenStudio::Model::CoilHeatingGas.new(model, model.alwaysOnDiscreteSchedule) supplemental_htg_coil.setName("#{air_loop.name} Gas Backup Htg Coil") when nil # Zero-capacity, always-off electric heating coil supplemental_htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOffDiscreteSchedule) supplemental_htg_coil.setName("#{air_loop.name} No Backup Heat") supplemental_htg_coil.setNominalCapacity(0) end clg_coil = nil if cooling_type == 'Water' if chilled_water_loop.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Model', 'No chilled water plant loop supplied') return false end clg_coil = OpenStudio::Model::CoilCoolingWater.new(model, model.alwaysOnDiscreteSchedule) clg_coil.setName("#{air_loop.name} Water Clg Coil") chilled_water_loop.addDemandBranchForComponent(clg_coil) elsif cooling_type == 'Two Speed DX AC' clg_cap_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp.setCoefficient1Constant(0.42415) clg_cap_f_of_temp.setCoefficient2x(0.04426) clg_cap_f_of_temp.setCoefficient3xPOW2(-0.00042) clg_cap_f_of_temp.setCoefficient4y(0.00333) clg_cap_f_of_temp.setCoefficient5yPOW2(-0.00008) clg_cap_f_of_temp.setCoefficient6xTIMESY(-0.00021) clg_cap_f_of_temp.setMinimumValueofx(17.0) clg_cap_f_of_temp.setMaximumValueofx(22.0) clg_cap_f_of_temp.setMinimumValueofy(13.0) clg_cap_f_of_temp.setMaximumValueofy(46.0) clg_cap_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_cap_f_of_flow.setCoefficient1Constant(0.77136) clg_cap_f_of_flow.setCoefficient2x(0.34053) clg_cap_f_of_flow.setCoefficient3xPOW2(-0.11088) clg_cap_f_of_flow.setMinimumValueofx(0.75918) clg_cap_f_of_flow.setMaximumValueofx(1.13877) clg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp.setCoefficient1Constant(1.23649) clg_energy_input_ratio_f_of_temp.setCoefficient2x(-0.02431) clg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(0.00057) clg_energy_input_ratio_f_of_temp.setCoefficient4y(-0.01434) clg_energy_input_ratio_f_of_temp.setCoefficient5yPOW2(0.00063) clg_energy_input_ratio_f_of_temp.setCoefficient6xTIMESY(-0.00038) clg_energy_input_ratio_f_of_temp.setMinimumValueofx(17.0) clg_energy_input_ratio_f_of_temp.setMaximumValueofx(22.0) clg_energy_input_ratio_f_of_temp.setMinimumValueofy(13.0) clg_energy_input_ratio_f_of_temp.setMaximumValueofy(46.0) clg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.20550) clg_energy_input_ratio_f_of_flow.setCoefficient2x(-0.32953) clg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.12308) clg_energy_input_ratio_f_of_flow.setMinimumValueofx(0.75918) clg_energy_input_ratio_f_of_flow.setMaximumValueofx(1.13877) clg_part_load_ratio = OpenStudio::Model::CurveQuadratic.new(model) clg_part_load_ratio.setCoefficient1Constant(0.77100) clg_part_load_ratio.setCoefficient2x(0.22900) clg_part_load_ratio.setCoefficient3xPOW2(0.0) clg_part_load_ratio.setMinimumValueofx(0.0) clg_part_load_ratio.setMaximumValueofx(1.0) clg_cap_f_of_temp_low_spd = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp_low_spd.setCoefficient1Constant(0.42415) clg_cap_f_of_temp_low_spd.setCoefficient2x(0.04426) clg_cap_f_of_temp_low_spd.setCoefficient3xPOW2(-0.00042) clg_cap_f_of_temp_low_spd.setCoefficient4y(0.00333) clg_cap_f_of_temp_low_spd.setCoefficient5yPOW2(-0.00008) clg_cap_f_of_temp_low_spd.setCoefficient6xTIMESY(-0.00021) clg_cap_f_of_temp_low_spd.setMinimumValueofx(17.0) clg_cap_f_of_temp_low_spd.setMaximumValueofx(22.0) clg_cap_f_of_temp_low_spd.setMinimumValueofy(13.0) clg_cap_f_of_temp_low_spd.setMaximumValueofy(46.0) clg_energy_input_ratio_f_of_temp_low_spd = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient1Constant(1.23649) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient2x(-0.02431) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient3xPOW2(0.00057) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient4y(-0.01434) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient5yPOW2(0.00063) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient6xTIMESY(-0.00038) clg_energy_input_ratio_f_of_temp_low_spd.setMinimumValueofx(17.0) clg_energy_input_ratio_f_of_temp_low_spd.setMaximumValueofx(22.0) clg_energy_input_ratio_f_of_temp_low_spd.setMinimumValueofy(13.0) clg_energy_input_ratio_f_of_temp_low_spd.setMaximumValueofy(46.0) clg_coil = OpenStudio::Model::CoilCoolingDXTwoSpeed.new(model, model.alwaysOnDiscreteSchedule, clg_cap_f_of_temp, clg_cap_f_of_flow, clg_energy_input_ratio_f_of_temp, clg_energy_input_ratio_f_of_flow, clg_part_load_ratio, clg_cap_f_of_temp_low_spd, clg_energy_input_ratio_f_of_temp_low_spd) clg_coil.setName("#{air_loop.name} 2spd DX AC Clg Coil") clg_coil.setRatedLowSpeedSensibleHeatRatio(OpenStudio::OptionalDouble.new(0.69)) clg_coil.setBasinHeaterCapacity(10) clg_coil.setBasinHeaterSetpointTemperature(2.0) elsif cooling_type == 'Single Speed DX AC' # Defaults to "DOE Ref DX Clg Coil Cool-Cap-fT" clg_cap_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp.setCoefficient1Constant(0.9712123) clg_cap_f_of_temp.setCoefficient2x(-0.015275502) clg_cap_f_of_temp.setCoefficient3xPOW2(0.0014434524) clg_cap_f_of_temp.setCoefficient4y(-0.00039321) clg_cap_f_of_temp.setCoefficient5yPOW2(-0.0000068364) clg_cap_f_of_temp.setCoefficient6xTIMESY(-0.0002905956) clg_cap_f_of_temp.setMinimumValueofx(-100.0) clg_cap_f_of_temp.setMaximumValueofx(100.0) clg_cap_f_of_temp.setMinimumValueofy(-100.0) clg_cap_f_of_temp.setMaximumValueofy(100.0) clg_cap_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_cap_f_of_flow.setCoefficient1Constant(1.0) clg_cap_f_of_flow.setCoefficient2x(0.0) clg_cap_f_of_flow.setCoefficient3xPOW2(0.0) clg_cap_f_of_flow.setMinimumValueofx(-100.0) clg_cap_f_of_flow.setMaximumValueofx(100.0) # "DOE Ref DX Clg Coil Cool-EIR-fT", clg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp.setCoefficient1Constant(0.28687133) clg_energy_input_ratio_f_of_temp.setCoefficient2x(0.023902164) clg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(-0.000810648) clg_energy_input_ratio_f_of_temp.setCoefficient4y(0.013458546) clg_energy_input_ratio_f_of_temp.setCoefficient5yPOW2(0.0003389364) clg_energy_input_ratio_f_of_temp.setCoefficient6xTIMESY(-0.0004870044) clg_energy_input_ratio_f_of_temp.setMinimumValueofx(-100.0) clg_energy_input_ratio_f_of_temp.setMaximumValueofx(100.0) clg_energy_input_ratio_f_of_temp.setMinimumValueofy(-100.0) clg_energy_input_ratio_f_of_temp.setMaximumValueofy(100.0) clg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.0) clg_energy_input_ratio_f_of_flow.setCoefficient2x(0.0) clg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.0) clg_energy_input_ratio_f_of_flow.setMinimumValueofx(-100.0) clg_energy_input_ratio_f_of_flow.setMaximumValueofx(100.0) # "DOE Ref DX Clg Coil Cool-PLF-fPLR" clg_part_load_ratio = OpenStudio::Model::CurveQuadratic.new(model) clg_part_load_ratio.setCoefficient1Constant(0.90949556) clg_part_load_ratio.setCoefficient2x(0.09864773) clg_part_load_ratio.setCoefficient3xPOW2(-0.00819488) clg_part_load_ratio.setMinimumValueofx(0.0) clg_part_load_ratio.setMaximumValueofx(1.0) clg_part_load_ratio.setMinimumCurveOutput(0.7) clg_part_load_ratio.setMaximumCurveOutput(1.0) clg_coil = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, clg_cap_f_of_temp, clg_cap_f_of_flow, clg_energy_input_ratio_f_of_temp, clg_energy_input_ratio_f_of_flow, clg_part_load_ratio) clg_coil.setName("#{air_loop.name} 1spd DX AC Clg Coil") elsif cooling_type == 'Single Speed Heat Pump' # "PSZ-AC_Unitary_PackagecoolCapFT" clg_cap_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp.setCoefficient1Constant(0.766956) clg_cap_f_of_temp.setCoefficient2x(0.0107756) clg_cap_f_of_temp.setCoefficient3xPOW2(-0.0000414703) clg_cap_f_of_temp.setCoefficient4y(0.00134961) clg_cap_f_of_temp.setCoefficient5yPOW2(-0.000261144) clg_cap_f_of_temp.setCoefficient6xTIMESY(0.000457488) clg_cap_f_of_temp.setMinimumValueofx(12.78) clg_cap_f_of_temp.setMaximumValueofx(23.89) clg_cap_f_of_temp.setMinimumValueofy(21.1) clg_cap_f_of_temp.setMaximumValueofy(46.1) clg_cap_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_cap_f_of_flow.setCoefficient1Constant(0.8) clg_cap_f_of_flow.setCoefficient2x(0.2) clg_cap_f_of_flow.setCoefficient3xPOW2(0.0) clg_cap_f_of_flow.setMinimumValueofx(0.5) clg_cap_f_of_flow.setMaximumValueofx(1.5) clg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp.setCoefficient1Constant(0.297145) clg_energy_input_ratio_f_of_temp.setCoefficient2x(0.0430933) clg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(-0.000748766) clg_energy_input_ratio_f_of_temp.setCoefficient4y(0.00597727) clg_energy_input_ratio_f_of_temp.setCoefficient5yPOW2(0.000482112) clg_energy_input_ratio_f_of_temp.setCoefficient6xTIMESY(-0.000956448) clg_energy_input_ratio_f_of_temp.setMinimumValueofx(12.78) clg_energy_input_ratio_f_of_temp.setMaximumValueofx(23.89) clg_energy_input_ratio_f_of_temp.setMinimumValueofy(21.1) clg_energy_input_ratio_f_of_temp.setMaximumValueofy(46.1) clg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.156) clg_energy_input_ratio_f_of_flow.setCoefficient2x(-0.1816) clg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.0256) clg_energy_input_ratio_f_of_flow.setMinimumValueofx(0.5) clg_energy_input_ratio_f_of_flow.setMaximumValueofx(1.5) clg_part_load_ratio = OpenStudio::Model::CurveQuadratic.new(model) clg_part_load_ratio.setCoefficient1Constant(0.85) clg_part_load_ratio.setCoefficient2x(0.15) clg_part_load_ratio.setCoefficient3xPOW2(0.0) clg_part_load_ratio.setMinimumValueofx(0.0) clg_part_load_ratio.setMaximumValueofx(1.0) clg_coil = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, clg_cap_f_of_temp, clg_cap_f_of_flow, clg_energy_input_ratio_f_of_temp, clg_energy_input_ratio_f_of_flow, clg_part_load_ratio) clg_coil.setName("#{air_loop.name} 1spd DX HP Clg Coil") # clg_coil.setMaximumOutdoorDryBulbTemperatureForCrankcaseHeaterOperation(OpenStudio::OptionalDouble.new(10.0)) # clg_coil.setRatedSensibleHeatRatio(0.69) # clg_coil.setBasinHeaterCapacity(10) # clg_coil.setBasinHeaterSetpointTemperature(2.0) elsif cooling_type == 'Water To Air Heat Pump' if chilled_water_loop.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Model', 'No chilled water plant loop supplied') return false end clg_coil = OpenStudio::Model::CoilCoolingWaterToAirHeatPumpEquationFit.new(model) clg_coil.setName("#{air_loop.name} Water-to-Air HP Clg Coil") clg_coil.setRatedCoolingCoefficientofPerformance(3.4) # TODO: add this to standards clg_coil.setTotalCoolingCapacityCoefficient1(-4.30266987344639) clg_coil.setTotalCoolingCapacityCoefficient2(7.18536990534372) clg_coil.setTotalCoolingCapacityCoefficient3(-2.23946714486189) clg_coil.setTotalCoolingCapacityCoefficient4(0.139995928440879) clg_coil.setTotalCoolingCapacityCoefficient5(0.102660179888915) clg_coil.setSensibleCoolingCapacityCoefficient1(6.0019444814887) clg_coil.setSensibleCoolingCapacityCoefficient2(22.6300677244073) clg_coil.setSensibleCoolingCapacityCoefficient3(-26.7960783730934) clg_coil.setSensibleCoolingCapacityCoefficient4(-1.72374720346819) clg_coil.setSensibleCoolingCapacityCoefficient5(0.490644802367817) clg_coil.setSensibleCoolingCapacityCoefficient6(0.0693119353468141) clg_coil.setCoolingPowerConsumptionCoefficient1(-5.67775976415698) clg_coil.setCoolingPowerConsumptionCoefficient2(0.438988156976704) clg_coil.setCoolingPowerConsumptionCoefficient3(5.845277342193) clg_coil.setCoolingPowerConsumptionCoefficient4(0.141605667000125) clg_coil.setCoolingPowerConsumptionCoefficient5(-0.168727936032429) chilled_water_loop.addDemandBranchForComponent(clg_coil) end oa_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_controller.setName("#{air_loop.name} OA Sys Controller") oa_controller.setMinimumOutdoorAirSchedule(oa_damper_sch) oa_system = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_controller) oa_system.setName("#{air_loop.name} OA Sys") econ_eff_sch = model_add_schedule(model, 'RetailStandalone PSZ_Econ_MaxOAFrac_Sch') # Add the components to the air loop # in order from closest to zone to furthest from zone supply_inlet_node = air_loop.supplyInletNode # Wrap coils in a unitary system or not, depending # on the system type. if fan_type == 'Cycling' if heating_type == 'Water To Air Heat Pump' unitary_system = OpenStudio::Model::AirLoopHVACUnitarySystem.new(model) unitary_system.setSupplyFan(fan) unitary_system.setHeatingCoil(htg_coil) unitary_system.setCoolingCoil(clg_coil) unitary_system.setSupplementalHeatingCoil(supplemental_htg_coil) unitary_system.setName("#{zone.name} Unitary HP") unitary_system.setControllingZoneorThermostatLocation(zone) unitary_system.setMaximumSupplyAirTemperature(50) unitary_system.setFanPlacement('BlowThrough') unitary_system.setSupplyAirFlowRateMethodDuringCoolingOperation('SupplyAirFlowRate') unitary_system.setSupplyAirFlowRateMethodDuringHeatingOperation('SupplyAirFlowRate') unitary_system.setSupplyAirFlowRateMethodWhenNoCoolingorHeatingisRequired('SupplyAirFlowRate') unitary_system.(model.alwaysOnDiscreteSchedule) unitary_system.addToNode(supply_inlet_node) setpoint_mgr_single_zone_reheat.setMaximumSupplyAirTemperature(50) else unitary_system = OpenStudio::Model::AirLoopHVACUnitaryHeatPumpAirToAir.new(model, model.alwaysOnDiscreteSchedule, fan, htg_coil, clg_coil, supplemental_htg_coil) unitary_system.setName("#{air_loop.name} Unitary HP") unitary_system.setControllingZone(zone) unitary_system.setMaximumOutdoorDryBulbTemperatureforSupplementalHeaterOperation(OpenStudio.convert(40, 'F', 'C').get) unitary_system.setFanPlacement(fan_location) unitary_system.(hvac_op_sch) unitary_system.addToNode(supply_inlet_node) setpoint_mgr_single_zone_reheat.setMinimumSupplyAirTemperature(OpenStudio.convert(55, 'F', 'C').get) setpoint_mgr_single_zone_reheat.setMaximumSupplyAirTemperature(OpenStudio.convert(104, 'F', 'C').get) end else if fan_location == 'DrawThrough' # Add the fan unless fan.nil? fan.addToNode(supply_inlet_node) end # Add the supplemental heating coil unless supplemental_htg_coil.nil? supplemental_htg_coil.addToNode(supply_inlet_node) end # Add the heating coil unless htg_coil.nil? htg_coil.addToNode(supply_inlet_node) end # Add the cooling coil unless clg_coil.nil? clg_coil.addToNode(supply_inlet_node) end elsif fan_location == 'BlowThrough' # Add the supplemental heating coil unless supplemental_htg_coil.nil? supplemental_htg_coil.addToNode(supply_inlet_node) end # Add the cooling coil unless clg_coil.nil? clg_coil.addToNode(supply_inlet_node) end # Add the heating coil unless htg_coil.nil? htg_coil.addToNode(supply_inlet_node) end # Add the fan unless fan.nil? fan.addToNode(supply_inlet_node) end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Model', 'Invalid fan location') return false end setpoint_mgr_single_zone_reheat.setMinimumSupplyAirTemperature(OpenStudio.convert(50, 'F', 'C').get) setpoint_mgr_single_zone_reheat.setMaximumSupplyAirTemperature(OpenStudio.convert(122, 'F', 'C').get) end # Add the OA system oa_system.addToNode(supply_inlet_node) # Attach the nightcycle manager to the supply outlet node setpoint_mgr_single_zone_reheat.addToNode(air_loop.supplyOutletNode) air_loop.setNightCycleControlType('CycleOnAny') # Create a diffuser and attach the zone/diffuser pair to the air loop diffuser = OpenStudio::Model::AirTerminalSingleDuctUncontrolled.new(model, model.alwaysOnDiscreteSchedule) diffuser.setName("#{air_loop.name} Diffuser") air_loop.addBranchForZone(zone, diffuser.to_StraightComponent) end return air_loops end |
#model_add_psz_vav(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, heating_type, supplemental_heating_type, building_type = nil) ⇒ Array<OpenStudio::Model::AirLoopHVAC>
Creates a packaged single zone VAV system for each zone and adds it to the model.
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open
2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 |
# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 2344 def model_add_psz_vav(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, heating_type, supplemental_heating_type, building_type = nil) # control temps used across all air handlers clg_sa_temp_f = 55 # Central deck clg temp 55F prehtg_sa_temp_f = 44.6 # Preheat to 44.6F htg_sa_temp_f = 55 # Central deck htg temp 55F rht_sa_temp_f = 104 # VAV box reheat to 104F clg_sa_temp_c = OpenStudio.convert(clg_sa_temp_f, 'F', 'C').get prehtg_sa_temp_c = OpenStudio.convert(prehtg_sa_temp_f, 'F', 'C').get htg_sa_temp_c = OpenStudio.convert(htg_sa_temp_f, 'F', 'C').get rht_sa_temp_c = OpenStudio.convert(rht_sa_temp_f, 'F', 'C').get # hvac operation schedule hvac_op_sch = if hvac_op_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, hvac_op_sch) end # oa damper schedule oa_damper_sch = if oa_damper_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, oa_damper_sch) end # Make a PSZ-VAV for each zone air_loops = [] thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding PSZ-VAV for #{zone.name}.") air_loop = OpenStudio::Model::AirLoopHVAC.new(model) if sys_name.nil? air_loop.setName("#{zone.name} PSZ-VAV") else air_loop.setName("#{zone.name} #{sys_name}") end air_loop.setAvailabilitySchedule(hvac_op_sch) air_loops << air_loop # Sizing air_loop_sizing = air_loop.sizingSystem air_loop_sizing.setTypeofLoadtoSizeOn('Sensible') air_loop_sizing.autosizeDesignOutdoorAirFlowRate air_loop_sizing.setMinimumSystemAirFlowRatio(0.0) air_loop_sizing.setPreheatDesignTemperature(7.0) air_loop_sizing.setPreheatDesignHumidityRatio(0.008) air_loop_sizing.setPrecoolDesignTemperature(12.8) air_loop_sizing.setPrecoolDesignHumidityRatio(0.008) air_loop_sizing.setCentralCoolingDesignSupplyAirTemperature(12.8) air_loop_sizing.setCentralHeatingDesignSupplyAirTemperature(40.0) air_loop_sizing.setSizingOption('Coincident') air_loop_sizing.setAllOutdoorAirinCooling(false) air_loop_sizing.setAllOutdoorAirinHeating(false) air_loop_sizing.setCentralCoolingDesignSupplyAirHumidityRatio(0.0085) air_loop_sizing.setCentralHeatingDesignSupplyAirHumidityRatio(0.0080) air_loop_sizing.setCoolingDesignAirFlowMethod('DesignDay') air_loop_sizing.setCoolingDesignAirFlowRate(0.0) air_loop_sizing.setHeatingDesignAirFlowMethod('DesignDay') air_loop_sizing.setHeatingDesignAirFlowRate(0.0) air_loop_sizing.setSystemOutdoorAirMethod('ZoneSum') # Zone sizing sizing_zone = zone.sizingZone sizing_zone.setZoneCoolingDesignSupplyAirTemperature(14) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(40.0) # Add a setpoint manager single zone reheat to control the # supply air temperature based on the needs of this zone setpoint_mgr_single_zone_reheat = OpenStudio::Model::SetpointManagerSingleZoneReheat.new(model) setpoint_mgr_single_zone_reheat.setControlZone(zone) # Fan fan = OpenStudio::Model::FanVariableVolume.new(model, hvac_op_sch) fan.setName("#{air_loop.name} Fan") fan_static_pressure_in_h2o = 2.5 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan.setPressureRise(fan_static_pressure_pa) fan.setFanEfficiency(0.54) fan.setMotorEfficiency(0.90) # Heating coil htg_coil = nil case heating_type when 'NaturalGas', 'Gas' htg_coil = OpenStudio::Model::CoilHeatingGas.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{air_loop.name} Gas Htg Coil") when nil # Zero-capacity, always-off electric heating coil htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOffDiscreteSchedule) htg_coil.setName("#{air_loop.name} No Heat") htg_coil.setNominalCapacity(0) when 'Electricity', 'Electric' htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{air_loop.name} Electric Htg Coil") end supplemental_htg_coil = nil case supplemental_heating_type when 'Electricity', 'Electric' # TODO change spreadsheet to Electricity supplemental_htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) supplemental_htg_coil.setName("#{air_loop.name} Electric Backup Htg Coil") when 'NaturalGas', 'Gas' supplemental_htg_coil = OpenStudio::Model::CoilHeatingGas.new(model, model.alwaysOnDiscreteSchedule) supplemental_htg_coil.setName("#{air_loop.name} Gas Backup Htg Coil") when nil # Zero-capacity, always-off electric heating coil supplemental_htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOffDiscreteSchedule) supplemental_htg_coil.setName("#{air_loop.name} No Backup Heat") supplemental_htg_coil.setNominalCapacity(0) end # Cooling coil clg_coil = OpenStudio::Model::CoilCoolingDXVariableSpeed.new(model) clg_coil.setName("#{air_loop.name} Var spd DX AC Clg Coil") clg_coil.setBasinHeaterCapacity(10) clg_coil.setBasinHeaterSetpointTemperature(2.0) # First speed level clg_spd_1 = OpenStudio::Model::CoilCoolingDXVariableSpeedSpeedData.new(model) clg_coil.addSpeed(clg_spd_1) clg_coil.setNominalSpeedLevel(1) # Outdoor air system oa_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_controller.setName("#{air_loop.name} OA Sys Controller") oa_controller.setMinimumOutdoorAirSchedule(oa_damper_sch) oa_controller.autosizeMinimumOutdoorAirFlowRate oa_controller.setHeatRecoveryBypassControlType('BypassWhenOAFlowGreaterThanMinimum') oa_system = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_controller) oa_system.setName("#{air_loop.name} OA Sys") econ_eff_sch = model_add_schedule(model, 'RetailStandalone PSZ_Econ_MaxOAFrac_Sch') # Add the components to the air loop # in order from closest to zone to furthest from zone supply_inlet_node = air_loop.supplyInletNode # Wrap coils in a unitary system unitary_system = OpenStudio::Model::AirLoopHVACUnitarySystem.new(model) unitary_system.setSupplyFan(fan) unitary_system.setHeatingCoil(htg_coil) unitary_system.setCoolingCoil(clg_coil) unitary_system.setSupplementalHeatingCoil(supplemental_htg_coil) unitary_system.setName("#{zone.name} Unitary PSZ-VAV") unitary_system.setString(2, 'SingleZoneVAV') # TODO add setControlType() method unitary_system.setControllingZoneorThermostatLocation(zone) unitary_system.setMaximumSupplyAirTemperature(50) unitary_system.setFanPlacement('BlowThrough') unitary_system.setSupplyAirFlowRateMethodDuringCoolingOperation('SupplyAirFlowRate') unitary_system.setSupplyAirFlowRateMethodDuringHeatingOperation('SupplyAirFlowRate') unitary_system.setSupplyAirFlowRateMethodWhenNoCoolingorHeatingisRequired('SupplyAirFlowRate') unitary_system.(model.alwaysOnDiscreteSchedule) unitary_system.addToNode(supply_inlet_node) # Add the OA system oa_system.addToNode(supply_inlet_node) # Set up nightcycling air_loop.setNightCycleControlType('CycleOnAny') # Create a VAV no reheat terminal and attach the zone/terminal pair to the air loop diffuser = OpenStudio::Model::AirTerminalSingleDuctVAVNoReheat.new(model, model.alwaysOnDiscreteSchedule) diffuser.setName("#{air_loop.name} Diffuser") air_loop.addBranchForZone(zone, diffuser.to_StraightComponent) end return air_loops end |
#model_add_ptac(model, sys_name, hot_water_loop, thermal_zones, fan_type, heating_type, cooling_type, building_type = nil) ⇒ Array<OpenStudio::Model::ZoneHVACPackagedTerminalAirConditioner>
Creates a PTAC system for each zone and adds it to the model.
NaturalGas, Electricity, Water, nil (no heat) Two Speed DX AC, Single Speed DX AC array of the resulting PTACs.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 3242 def model_add_ptac(model, sys_name, hot_water_loop, thermal_zones, fan_type, heating_type, cooling_type, building_type = nil) thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding PTAC for #{zone.name}.") end # schedule: always off always_off = OpenStudio::Model::ScheduleRuleset.new(model) always_off.setName('ALWAYS_OFF') always_off.defaultDaySchedule.setName('ALWAYS_OFF day') always_off.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0.0) always_off.setSummerDesignDaySchedule(always_off.defaultDaySchedule) always_off.setWinterDesignDaySchedule(always_off.defaultDaySchedule) # Make a PTAC for each zone ptacs = [] thermal_zones.each do |zone| # Zone sizing sizing_zone = zone.sizingZone sizing_zone.setZoneCoolingDesignSupplyAirTemperature(14) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(50.0) sizing_zone.setZoneCoolingDesignSupplyAirHumidityRatio(0.008) sizing_zone.setZoneHeatingDesignSupplyAirHumidityRatio(0.008) # add fan fan = nil if fan_type == 'ConstantVolume' fan = OpenStudio::Model::FanConstantVolume.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{zone.name} PTAC Fan") fan_static_pressure_in_h2o = 1.33 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan.setPressureRise(fan_static_pressure_pa) fan.setFanEfficiency(0.52) fan.setMotorEfficiency(0.8) elsif fan_type == 'Cycling' fan = OpenStudio::Model::FanOnOff.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{zone.name} PTAC Fan") fan_static_pressure_in_h2o = 1.33 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan.setPressureRise(fan_static_pressure_pa) fan.setFanEfficiency(0.52) fan.setMotorEfficiency(0.8) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', "ptac_fan_type of #{fan_type} is not recognized.") end # add heating coil htg_coil = nil case heating_type when 'NaturalGas', 'Gas' htg_coil = OpenStudio::Model::CoilHeatingGas.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{zone.name} PTAC Gas Htg Coil") when 'Electricity', 'Electric' htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{zone.name} PTAC Electric Htg Coil") when nil htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOffDiscreteSchedule) htg_coil.setName("#{zone.name} PTAC No Heat") htg_coil.setNominalCapacity(0) when 'Water' if hot_water_loop.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Model', 'No hot water plant loop supplied') return false end hw_sizing = hot_water_loop.sizingPlant hw_temp_c = hw_sizing.designLoopExitTemperature hw_delta_t_k = hw_sizing.loopDesignTemperatureDifference # Using openstudio defaults for now... prehtg_sa_temp_c = 16.6 htg_sa_temp_c = 32.2 htg_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{hot_water_loop.name} Water Htg Coil") # None of these temperatures are defined htg_coil.setRatedInletWaterTemperature(hw_temp_c) htg_coil.setRatedInletAirTemperature(prehtg_sa_temp_c) htg_coil.setRatedOutletWaterTemperature(hw_temp_c - hw_delta_t_k) htg_coil.setRatedOutletAirTemperature(htg_sa_temp_c) hot_water_loop.addDemandBranchForComponent(htg_coil) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', "ptac_heating_type of #{heating_type} is not recognized.") end # add cooling coil clg_coil = nil if cooling_type == 'Two Speed DX AC' clg_cap_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp.setCoefficient1Constant(0.42415) clg_cap_f_of_temp.setCoefficient2x(0.04426) clg_cap_f_of_temp.setCoefficient3xPOW2(-0.00042) clg_cap_f_of_temp.setCoefficient4y(0.00333) clg_cap_f_of_temp.setCoefficient5yPOW2(-0.00008) clg_cap_f_of_temp.setCoefficient6xTIMESY(-0.00021) clg_cap_f_of_temp.setMinimumValueofx(17.0) clg_cap_f_of_temp.setMaximumValueofx(22.0) clg_cap_f_of_temp.setMinimumValueofy(13.0) clg_cap_f_of_temp.setMaximumValueofy(46.0) clg_cap_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_cap_f_of_flow.setCoefficient1Constant(0.77136) clg_cap_f_of_flow.setCoefficient2x(0.34053) clg_cap_f_of_flow.setCoefficient3xPOW2(-0.11088) clg_cap_f_of_flow.setMinimumValueofx(0.75918) clg_cap_f_of_flow.setMaximumValueofx(1.13877) clg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp.setCoefficient1Constant(1.23649) clg_energy_input_ratio_f_of_temp.setCoefficient2x(-0.02431) clg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(0.00057) clg_energy_input_ratio_f_of_temp.setCoefficient4y(-0.01434) clg_energy_input_ratio_f_of_temp.setCoefficient5yPOW2(0.00063) clg_energy_input_ratio_f_of_temp.setCoefficient6xTIMESY(-0.00038) clg_energy_input_ratio_f_of_temp.setMinimumValueofx(17.0) clg_energy_input_ratio_f_of_temp.setMaximumValueofx(22.0) clg_energy_input_ratio_f_of_temp.setMinimumValueofy(13.0) clg_energy_input_ratio_f_of_temp.setMaximumValueofy(46.0) clg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.20550) clg_energy_input_ratio_f_of_flow.setCoefficient2x(-0.32953) clg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.12308) clg_energy_input_ratio_f_of_flow.setMinimumValueofx(0.75918) clg_energy_input_ratio_f_of_flow.setMaximumValueofx(1.13877) clg_part_load_ratio = OpenStudio::Model::CurveQuadratic.new(model) clg_part_load_ratio.setCoefficient1Constant(0.77100) clg_part_load_ratio.setCoefficient2x(0.22900) clg_part_load_ratio.setCoefficient3xPOW2(0.0) clg_part_load_ratio.setMinimumValueofx(0.0) clg_part_load_ratio.setMaximumValueofx(1.0) clg_cap_f_of_temp_low_spd = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp_low_spd.setCoefficient1Constant(0.42415) clg_cap_f_of_temp_low_spd.setCoefficient2x(0.04426) clg_cap_f_of_temp_low_spd.setCoefficient3xPOW2(-0.00042) clg_cap_f_of_temp_low_spd.setCoefficient4y(0.00333) clg_cap_f_of_temp_low_spd.setCoefficient5yPOW2(-0.00008) clg_cap_f_of_temp_low_spd.setCoefficient6xTIMESY(-0.00021) clg_cap_f_of_temp_low_spd.setMinimumValueofx(17.0) clg_cap_f_of_temp_low_spd.setMaximumValueofx(22.0) clg_cap_f_of_temp_low_spd.setMinimumValueofy(13.0) clg_cap_f_of_temp_low_spd.setMaximumValueofy(46.0) clg_energy_input_ratio_f_of_temp_low_spd = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient1Constant(1.23649) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient2x(-0.02431) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient3xPOW2(0.00057) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient4y(-0.01434) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient5yPOW2(0.00063) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient6xTIMESY(-0.00038) clg_energy_input_ratio_f_of_temp_low_spd.setMinimumValueofx(17.0) clg_energy_input_ratio_f_of_temp_low_spd.setMaximumValueofx(22.0) clg_energy_input_ratio_f_of_temp_low_spd.setMinimumValueofy(13.0) clg_energy_input_ratio_f_of_temp_low_spd.setMaximumValueofy(46.0) clg_coil = OpenStudio::Model::CoilCoolingDXTwoSpeed.new(model, model.alwaysOnDiscreteSchedule, clg_cap_f_of_temp, clg_cap_f_of_flow, clg_energy_input_ratio_f_of_temp, clg_energy_input_ratio_f_of_flow, clg_part_load_ratio, clg_cap_f_of_temp_low_spd, clg_energy_input_ratio_f_of_temp_low_spd) clg_coil.setName("#{zone.name} PTAC 2spd DX AC Clg Coil") clg_coil.setRatedLowSpeedSensibleHeatRatio(OpenStudio::OptionalDouble.new(0.69)) clg_coil.setBasinHeaterCapacity(10) clg_coil.setBasinHeaterSetpointTemperature(2.0) elsif cooling_type == 'Single Speed DX AC' # for small hotel clg_cap_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp.setCoefficient1Constant(0.942587793) clg_cap_f_of_temp.setCoefficient2x(0.009543347) clg_cap_f_of_temp.setCoefficient3xPOW2(0.000683770) clg_cap_f_of_temp.setCoefficient4y(-0.011042676) clg_cap_f_of_temp.setCoefficient5yPOW2(0.000005249) clg_cap_f_of_temp.setCoefficient6xTIMESY(-0.000009720) clg_cap_f_of_temp.setMinimumValueofx(12.77778) clg_cap_f_of_temp.setMaximumValueofx(23.88889) clg_cap_f_of_temp.setMinimumValueofy(18.3) clg_cap_f_of_temp.setMaximumValueofy(46.11111) clg_cap_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_cap_f_of_flow.setCoefficient1Constant(0.8) clg_cap_f_of_flow.setCoefficient2x(0.2) clg_cap_f_of_flow.setCoefficient3xPOW2(0.0) clg_cap_f_of_flow.setMinimumValueofx(0.5) clg_cap_f_of_flow.setMaximumValueofx(1.5) clg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp.setCoefficient1Constant(0.342414409) clg_energy_input_ratio_f_of_temp.setCoefficient2x(0.034885008) clg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(-0.000623700) clg_energy_input_ratio_f_of_temp.setCoefficient4y(0.004977216) clg_energy_input_ratio_f_of_temp.setCoefficient5yPOW2(0.000437951) clg_energy_input_ratio_f_of_temp.setCoefficient6xTIMESY(-0.000728028) clg_energy_input_ratio_f_of_temp.setMinimumValueofx(12.77778) clg_energy_input_ratio_f_of_temp.setMaximumValueofx(23.88889) clg_energy_input_ratio_f_of_temp.setMinimumValueofy(18.3) clg_energy_input_ratio_f_of_temp.setMaximumValueofy(46.11111) clg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.1552) clg_energy_input_ratio_f_of_flow.setCoefficient2x(-0.1808) clg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.0256) clg_energy_input_ratio_f_of_flow.setMinimumValueofx(0.5) clg_energy_input_ratio_f_of_flow.setMaximumValueofx(1.5) clg_part_load_ratio = OpenStudio::Model::CurveQuadratic.new(model) clg_part_load_ratio.setCoefficient1Constant(0.85) clg_part_load_ratio.setCoefficient2x(0.15) clg_part_load_ratio.setCoefficient3xPOW2(0.0) clg_part_load_ratio.setMinimumValueofx(0.0) clg_part_load_ratio.setMaximumValueofx(1.0) clg_part_load_ratio.setMinimumCurveOutput(0.7) clg_part_load_ratio.setMaximumCurveOutput(1.0) clg_coil = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, clg_cap_f_of_temp, clg_cap_f_of_flow, clg_energy_input_ratio_f_of_temp, clg_energy_input_ratio_f_of_flow, clg_part_load_ratio) clg_coil.setName("#{zone.name} PTAC 1spd DX AC Clg Coil") else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', "ptac_cooling_type of #{heating_type} is not recognized.") end # Wrap coils in a PTAC system ptac_system = OpenStudio::Model::ZoneHVACPackagedTerminalAirConditioner.new(model, model.alwaysOnDiscreteSchedule, fan, htg_coil, clg_coil) ptac_system.setName("#{zone.name} PTAC") ptac_system.setFanPlacement('DrawThrough') if fan_type == 'ConstantVolume' ptac_system.(model.alwaysOnDiscreteSchedule) elsif fan_type == 'Cycling' ptac_system.(always_off) end ptac_system.addToThermalZone(zone) ptacs << ptac_system end return ptacs end |
#model_add_pthp(model, sys_name, thermal_zones, fan_type, building_type = nil) ⇒ Array<OpenStudio::Model::ZoneHVACPackagedTerminalAirConditioner>
Creates a PTHP system for each zone and adds it to the model.
array of the resulting PTACs.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 3515 def model_add_pthp(model, sys_name, thermal_zones, fan_type, building_type = nil) thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding PTHP for #{zone.name}.") end # schedule: always off always_off = OpenStudio::Model::ScheduleRuleset.new(model) always_off.setName('ALWAYS_OFF') always_off.defaultDaySchedule.setName('ALWAYS_OFF day') always_off.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0.0) always_off.setSummerDesignDaySchedule(always_off.defaultDaySchedule) always_off.setWinterDesignDaySchedule(always_off.defaultDaySchedule) # Make a PTHP for each zone pthps = [] thermal_zones.each do |zone| # Zone sizing sizing_zone = zone.sizingZone sizing_zone.setZoneCoolingDesignSupplyAirTemperature(14) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(50.0) sizing_zone.setZoneCoolingDesignSupplyAirHumidityRatio(0.008) sizing_zone.setZoneHeatingDesignSupplyAirHumidityRatio(0.008) # add fan fan = nil if fan_type == 'ConstantVolume' fan = OpenStudio::Model::FanConstantVolume.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{zone.name} PTAC Fan") fan_static_pressure_in_h2o = 1.33 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan.setPressureRise(fan_static_pressure_pa) fan.setFanEfficiency(0.52) fan.setMotorEfficiency(0.8) elsif fan_type == 'Cycling' fan = OpenStudio::Model::FanOnOff.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{zone.name} PTAC Fan") fan_static_pressure_in_h2o = 1.33 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan.setPressureRise(fan_static_pressure_pa) fan.setFanEfficiency(0.52) fan.setMotorEfficiency(0.8) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', "ptac_fan_type of #{fan_type} is not recognized.") end # add heating coil htg_cap_f_of_temp = OpenStudio::Model::CurveCubic.new(model) htg_cap_f_of_temp.setCoefficient1Constant(0.758746) htg_cap_f_of_temp.setCoefficient2x(0.027626) htg_cap_f_of_temp.setCoefficient3xPOW2(0.000148716) htg_cap_f_of_temp.setCoefficient4xPOW3(0.0000034992) htg_cap_f_of_temp.setMinimumValueofx(-20.0) htg_cap_f_of_temp.setMaximumValueofx(20.0) htg_cap_f_of_flow = OpenStudio::Model::CurveCubic.new(model) htg_cap_f_of_flow.setCoefficient1Constant(0.84) htg_cap_f_of_flow.setCoefficient2x(0.16) htg_cap_f_of_flow.setCoefficient3xPOW2(0.0) htg_cap_f_of_flow.setCoefficient4xPOW3(0.0) htg_cap_f_of_flow.setMinimumValueofx(0.5) htg_cap_f_of_flow.setMaximumValueofx(1.5) htg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveCubic.new(model) htg_energy_input_ratio_f_of_temp.setCoefficient1Constant(1.19248) htg_energy_input_ratio_f_of_temp.setCoefficient2x(-0.0300438) htg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(0.00103745) htg_energy_input_ratio_f_of_temp.setCoefficient4xPOW3(-0.000023328) htg_energy_input_ratio_f_of_temp.setMinimumValueofx(-20.0) htg_energy_input_ratio_f_of_temp.setMaximumValueofx(20.0) htg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) htg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.3824) htg_energy_input_ratio_f_of_flow.setCoefficient2x(-0.4336) htg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.0512) htg_energy_input_ratio_f_of_flow.setMinimumValueofx(0.0) htg_energy_input_ratio_f_of_flow.setMaximumValueofx(1.0) htg_part_load_fraction = OpenStudio::Model::CurveQuadratic.new(model) htg_part_load_fraction.setCoefficient1Constant(0.85) htg_part_load_fraction.setCoefficient2x(0.15) htg_part_load_fraction.setCoefficient3xPOW2(0.0) htg_part_load_fraction.setMinimumValueofx(0.0) htg_part_load_fraction.setMaximumValueofx(1.0) htg_coil = OpenStudio::Model::CoilHeatingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, htg_cap_f_of_temp, htg_cap_f_of_flow, htg_energy_input_ratio_f_of_temp, htg_energy_input_ratio_f_of_flow, htg_part_load_fraction) htg_coil.setName("#{zone.name} PTHP Htg Coil") # add cooling coil clg_cap_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp.setCoefficient1Constant(0.766956) clg_cap_f_of_temp.setCoefficient2x(0.0107756) clg_cap_f_of_temp.setCoefficient3xPOW2(-0.0000414703) clg_cap_f_of_temp.setCoefficient4y(0.00134961) clg_cap_f_of_temp.setCoefficient5yPOW2(-0.000261144) clg_cap_f_of_temp.setCoefficient6xTIMESY(0.000457488) clg_cap_f_of_temp.setMinimumValueofx(12.78) clg_cap_f_of_temp.setMaximumValueofx(23.89) clg_cap_f_of_temp.setMinimumValueofy(21.1) clg_cap_f_of_temp.setMaximumValueofy(46.1) clg_cap_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_cap_f_of_flow.setCoefficient1Constant(0.8) clg_cap_f_of_flow.setCoefficient2x(0.2) clg_cap_f_of_flow.setCoefficient3xPOW2(0.0) clg_cap_f_of_flow.setMinimumValueofx(0.5) clg_cap_f_of_flow.setMaximumValueofx(1.5) clg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp.setCoefficient1Constant(0.297145) clg_energy_input_ratio_f_of_temp.setCoefficient2x(0.0430933) clg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(-0.000748766) clg_energy_input_ratio_f_of_temp.setCoefficient4y(0.00597727) clg_energy_input_ratio_f_of_temp.setCoefficient5yPOW2(0.000482112) clg_energy_input_ratio_f_of_temp.setCoefficient6xTIMESY(-0.000956448) clg_energy_input_ratio_f_of_temp.setMinimumValueofx(12.78) clg_energy_input_ratio_f_of_temp.setMaximumValueofx(23.89) clg_energy_input_ratio_f_of_temp.setMinimumValueofy(21.1) clg_energy_input_ratio_f_of_temp.setMaximumValueofy(46.1) clg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.156) clg_energy_input_ratio_f_of_flow.setCoefficient2x(-0.1816) clg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.0256) clg_energy_input_ratio_f_of_flow.setMinimumValueofx(0.5) clg_energy_input_ratio_f_of_flow.setMaximumValueofx(1.5) clg_part_load_ratio = OpenStudio::Model::CurveQuadratic.new(model) clg_part_load_ratio.setCoefficient1Constant(0.85) clg_part_load_ratio.setCoefficient2x(0.15) clg_part_load_ratio.setCoefficient3xPOW2(0.0) clg_part_load_ratio.setMinimumValueofx(0.0) clg_part_load_ratio.setMaximumValueofx(1.0) clg_coil = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, clg_cap_f_of_temp, clg_cap_f_of_flow, clg_energy_input_ratio_f_of_temp, clg_energy_input_ratio_f_of_flow, clg_part_load_ratio) clg_coil.setName("#{zone.name} PTHP Clg Coil") # clg_coil.setRatedSensibleHeatRatio(0.69) # clg_coil.setBasinHeaterCapacity(10) # clg_coil.setBasinHeaterSetpointTemperature(2.0) # Supplemental heating coil supplemental_htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) # Wrap coils in a PTHP system pthp_system = OpenStudio::Model::ZoneHVACPackagedTerminalHeatPump.new(model, model.alwaysOnDiscreteSchedule, fan, htg_coil, clg_coil, supplemental_htg_coil) pthp_system.setName("#{zone.name} PTHP") pthp_system.setFanPlacement('DrawThrough') if fan_type == 'ConstantVolume' pthp_system.(model.alwaysOnDiscreteSchedule) elsif fan_type == 'Cycling' pthp_system.(always_off) end pthp_system.addToThermalZone(zone) pthps << pthp_system end return pthps end |
#model_add_pvav(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, electric_reheat = false, hot_water_loop = nil, chilled_water_loop = nil, return_plenum = nil, building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
Creates a packaged VAV system and adds it to the model.
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open but if false, the reheat coils will be served by the hot_water_loop. the supply plenum, or nil, in which case no return plenum will be used.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 1136 def model_add_pvav(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, electric_reheat = false, hot_water_loop = nil, chilled_water_loop = nil, return_plenum = nil, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding Packaged VAV for #{thermal_zones.size} zones.") thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Model.Model', "---#{zone.name}") end # hvac operation schedule hvac_op_sch = if hvac_op_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, hvac_op_sch) end # oa damper schedule oa_damper_sch = if oa_damper_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, oa_damper_sch) end # Control temps for HW loop # will only be used when hot_water_loop is provided. hw_temp_f = 180 # HW setpoint 180F hw_delta_t_r = 20 # 20F delta-T hw_temp_c = OpenStudio.convert(hw_temp_f, 'F', 'C').get hw_delta_t_k = OpenStudio.convert(hw_delta_t_r, 'R', 'K').get # Control temps used across all air handlers sys_dsn_prhtg_temp_f = 44.6 # Design central deck to preheat to 44.6F sys_dsn_clg_sa_temp_f = 55 # Design central deck to cool to 55F sys_dsn_htg_sa_temp_f = 55 # Central heat to 55F zn_dsn_clg_sa_temp_f = 55 # Design VAV box for 55F from central deck zn_dsn_htg_sa_temp_f = 122 # Design VAV box to reheat to 122F rht_rated_air_in_temp_f = 55 # Reheat coils designed to receive 55F rht_rated_air_out_temp_f = 122 # Reheat coils designed to supply 122F clg_sa_temp_f = 55 # Central deck clg temp operates at 55F sys_dsn_prhtg_temp_c = OpenStudio.convert(sys_dsn_prhtg_temp_f, 'F', 'C').get sys_dsn_clg_sa_temp_c = OpenStudio.convert(sys_dsn_clg_sa_temp_f, 'F', 'C').get sys_dsn_htg_sa_temp_c = OpenStudio.convert(sys_dsn_htg_sa_temp_f, 'F', 'C').get zn_dsn_clg_sa_temp_c = OpenStudio.convert(zn_dsn_clg_sa_temp_f, 'F', 'C').get zn_dsn_htg_sa_temp_c = OpenStudio.convert(zn_dsn_htg_sa_temp_f, 'F', 'C').get rht_rated_air_in_temp_c = OpenStudio.convert(rht_rated_air_in_temp_f, 'F', 'C').get rht_rated_air_out_temp_c = OpenStudio.convert(rht_rated_air_out_temp_f, 'F', 'C').get clg_sa_temp_c = OpenStudio.convert(clg_sa_temp_f, 'F', 'C').get sa_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) sa_temp_sch.setName("Supply Air Temp - #{clg_sa_temp_f}F") sa_temp_sch.defaultDaySchedule.setName("Supply Air Temp - #{clg_sa_temp_f}F Default") sa_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), clg_sa_temp_c) # Air handler air_loop = OpenStudio::Model::AirLoopHVAC.new(model) if sys_name.nil? sys_name = "#{thermal_zones.size} Zone PVAV" air_loop.setName(sys_name) else air_loop.setName(sys_name) end air_loop.setAvailabilitySchedule(hvac_op_sch) # Air handler controls stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, sa_temp_sch) stpt_manager.addToNode(air_loop.supplyOutletNode) sizing_system = air_loop.sizingSystem # sizing_system.setPreheatDesignTemperature(sys_dsn_prhtg_temp_c) sizing_system.setCentralCoolingDesignSupplyAirTemperature(sys_dsn_clg_sa_temp_c) sizing_system.setCentralHeatingDesignSupplyAirTemperature(sys_dsn_htg_sa_temp_c) sizing_system.setSizingOption('Coincident') sizing_system.setAllOutdoorAirinCooling(false) sizing_system.setAllOutdoorAirinHeating(false) air_loop.setNightCycleControlType('CycleOnAny') # Fan fan = OpenStudio::Model::FanVariableVolume.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{air_loop.name} Fan") fan.addToNode(air_loop.supplyInletNode) # Heating coil - depends on whether heating is hot water or electric, # which is determined by whether or not a hot water loop is provided. if hot_water_loop.nil? htg_coil = OpenStudio::Model::CoilHeatingGas.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{air_loop.name} Main Htg Coil") htg_coil.addToNode(air_loop.supplyInletNode) else htg_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{air_loop.name} Main Htg Coil") htg_coil.setRatedInletWaterTemperature(hw_temp_c) htg_coil.setRatedInletAirTemperature(sys_dsn_prhtg_temp_c) htg_coil.setRatedOutletWaterTemperature(hw_temp_c - hw_delta_t_k) htg_coil.setRatedOutletAirTemperature(rht_rated_air_out_temp_c) htg_coil.addToNode(air_loop.supplyInletNode) hot_water_loop.addDemandBranchForComponent(htg_coil) end # Cooling coil if chilled_water_loop.nil? clg_coil = OpenStudio::Model::CoilCoolingDXTwoSpeed.new(model) clg_coil.setName("#{air_loop.name} Clg Coil") clg_coil.addToNode(air_loop.supplyInletNode) else clg_coil = OpenStudio::Model::CoilCoolingWater.new(model, model.alwaysOnDiscreteSchedule) clg_coil.setName("#{air_loop.name} Clg Coil") clg_coil.addToNode(air_loop.supplyInletNode) clg_coil.setHeatExchangerConfiguration('CrossFlow') chilled_water_loop.addDemandBranchForComponent(clg_coil) clg_coil.controllerWaterCoil.get.setName("#{air_loop.name} Clg Coil Controller") end # Outdoor air intake system oa_intake_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_intake_controller.setMinimumLimitType('FixedMinimum') oa_intake_controller.autosizeMinimumOutdoorAirFlowRate oa_intake_controller.setMinimumOutdoorAirSchedule(oa_damper_sch) oa_intake = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_intake_controller) oa_intake.setName("#{air_loop.name} OA Sys") oa_intake.addToNode(air_loop.supplyInletNode) controller_mv = oa_intake_controller.controllerMechanicalVentilation controller_mv.setName("#{air_loop.name} Ventilation Controller") controller_mv.setAvailabilitySchedule(oa_damper_sch) # Hook the VAV system to each zone thermal_zones.each do |zone| # Reheat coil rht_coil = nil # sys_name.include? "Outpatient F2 F3" is only for reheat coil of Outpatient Floor2&3 if electric_reheat || hot_water_loop.nil? || sys_name.include?('Outpatient F2 F3') rht_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) rht_coil.setName("#{zone.name} Rht Coil") else rht_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) rht_coil.setName("#{zone.name} Rht Coil") rht_coil.setRatedInletWaterTemperature(hw_temp_c) rht_coil.setRatedInletAirTemperature(rht_rated_air_in_temp_c) rht_coil.setRatedOutletWaterTemperature(hw_temp_c - hw_delta_t_k) rht_coil.setRatedOutletAirTemperature(rht_rated_air_out_temp_c) hot_water_loop.addDemandBranchForComponent(rht_coil) end # VAV terminal terminal = OpenStudio::Model::AirTerminalSingleDuctVAVReheat.new(model, model.alwaysOnDiscreteSchedule, rht_coil) terminal.setName("#{zone.name} VAV Term") terminal.setZoneMinimumAirFlowMethod('Constant') terminal.setMaximumReheatAirTemperature(rht_rated_air_out_temp_c) air_terminal_single_duct_vav_reheat_apply_initial_prototype_damper_position(terminal, building_type, thermal_zone_outdoor_airflow_rate_per_area(zone)) air_loop.addBranchForZone(zone, terminal.to_StraightComponent) unless return_plenum.nil? zone.setReturnPlenum(return_plenum) end # Zone sizing sizing_zone = zone.sizingZone sizing_zone.setZoneCoolingDesignSupplyAirTemperature(zn_dsn_clg_sa_temp_c) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(zn_dsn_htg_sa_temp_c) end # Set the damper action based on the template. air_loop_hvac_apply_vav_damper_action(air_loop) return true end |
#model_add_pvav_pfp_boxes(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, vav_fan_efficiency, vav_fan_motor_efficiency, vav_fan_pressure_rise, chilled_water_loop = nil, building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
Creates a packaged VAV system with parallel fan powered boxes and adds it to the model.
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 1325 def model_add_pvav_pfp_boxes(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, vav_fan_efficiency, vav_fan_motor_efficiency, vav_fan_pressure_rise, chilled_water_loop = nil, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding PVAV with PFP Boxes and Reheat system for #{thermal_zones.size} zones.") thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Model.Model', "---#{zone.name}") end # hvac operation schedule hvac_op_sch = if hvac_op_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, hvac_op_sch) end # oa damper schedule oa_damper_sch = if oa_damper_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, oa_damper_sch) end # control temps used across all air handlers clg_sa_temp_f = 55.04 # Central deck clg temp 55F prehtg_sa_temp_f = 44.6 # Preheat to 44.6F preclg_sa_temp_f = 55.04 # Precool to 55F htg_sa_temp_f = 55.04 # Central deck htg temp 55F rht_sa_temp_f = 104 # VAV box reheat to 104F zone_htg_sa_temp_f = 104 # Zone heating design supply air temperature to 104 F clg_sa_temp_c = OpenStudio.convert(clg_sa_temp_f, 'F', 'C').get prehtg_sa_temp_c = OpenStudio.convert(prehtg_sa_temp_f, 'F', 'C').get preclg_sa_temp_c = OpenStudio.convert(preclg_sa_temp_f, 'F', 'C').get htg_sa_temp_c = OpenStudio.convert(htg_sa_temp_f, 'F', 'C').get rht_sa_temp_c = OpenStudio.convert(rht_sa_temp_f, 'F', 'C').get zone_htg_sa_temp_c = OpenStudio.convert(zone_htg_sa_temp_f, 'F', 'C').get sa_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) sa_temp_sch.setName("Supply Air Temp - #{clg_sa_temp_f}F") sa_temp_sch.defaultDaySchedule.setName("Supply Air Temp - #{clg_sa_temp_f}F Default") sa_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), clg_sa_temp_c) # air handler air_loop = OpenStudio::Model::AirLoopHVAC.new(model) if sys_name.nil? air_loop.setName("#{thermal_zones.size} Zone VAV with PFP Boxes and Reheat") else air_loop.setName(sys_name) end air_loop.setAvailabilitySchedule(hvac_op_sch) sa_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, sa_temp_sch) sa_stpt_manager.setName("#{thermal_zones.size} Zone VAV supply air setpoint manager") sa_stpt_manager.addToNode(air_loop.supplyOutletNode) # air handler controls sizing_system = air_loop.sizingSystem sizing_system.setPreheatDesignTemperature(prehtg_sa_temp_c) sizing_system.setPrecoolDesignTemperature(preclg_sa_temp_c) sizing_system.setCentralCoolingDesignSupplyAirTemperature(clg_sa_temp_c) sizing_system.setCentralHeatingDesignSupplyAirTemperature(htg_sa_temp_c) sizing_system.setSizingOption('Coincident') sizing_system.setAllOutdoorAirinCooling(false) sizing_system.setAllOutdoorAirinHeating(false) sizing_system.setSystemOutdoorAirMethod('ZoneSum') # fan fan = OpenStudio::Model::FanVariableVolume.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{air_loop.name} Fan") fan.setFanEfficiency(vav_fan_efficiency) fan.setMotorEfficiency(vav_fan_motor_efficiency) fan.setPressureRise(vav_fan_pressure_rise) fan.setFanPowerMinimumFlowRateInputMethod('fraction') fan.setFanPowerMinimumFlowFraction(0.25) fan.addToNode(air_loop.supplyInletNode) fan.setEndUseSubcategory('VAV system Fans') # heating coil htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{air_loop.name} Main Htg Coil") htg_coil.addToNode(air_loop.supplyInletNode) # Cooling coil if chilled_water_loop.nil? clg_coil = OpenStudio::Model::CoilCoolingDXTwoSpeed.new(model) clg_coil.setName("#{air_loop.name} Clg Coil") clg_coil.addToNode(air_loop.supplyInletNode) else clg_coil = OpenStudio::Model::CoilCoolingWater.new(model, model.alwaysOnDiscreteSchedule) clg_coil.setName("#{air_loop.name} Clg Coil") clg_coil.addToNode(air_loop.supplyInletNode) clg_coil.setHeatExchangerConfiguration('CrossFlow') chilled_water_loop.addDemandBranchForComponent(clg_coil) clg_coil.controllerWaterCoil.get.setName("#{air_loop.name} Clg Coil Controller") end # outdoor air intake system oa_intake_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_intake_controller.setName("#{air_loop.name} OA Controller") oa_intake_controller.setMinimumLimitType('FixedMinimum') oa_intake_controller.autosizeMinimumOutdoorAirFlowRate oa_intake_controller.setMinimumOutdoorAirSchedule(oa_damper_sch) controller_mv = oa_intake_controller.controllerMechanicalVentilation controller_mv.setName("#{air_loop.name} Vent Controller") controller_mv.setSystemOutdoorAirMethod('VentilationRateProcedure') oa_intake = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_intake_controller) oa_intake.setName("#{air_loop.name} OA Sys") oa_intake.addToNode(air_loop.supplyInletNode) # The oa system need to be added before setting the night cycle control air_loop.setNightCycleControlType('CycleOnAny') # hook the VAV system to each zone thermal_zones.each do |zone| # reheat coil rht_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) rht_coil.setName("#{zone.name} Rht Coil") # terminal fan pfp_fan = OpenStudio::Model::FanConstantVolume.new(model, model.alwaysOnDiscreteSchedule) pfp_fan.setName("#{zone.name} PFP Term Fan") pfp_fan.setPressureRise(300) # parallel fan powered terminal pfp_terminal = OpenStudio::Model::AirTerminalSingleDuctParallelPIUReheat.new(model, model.alwaysOnDiscreteSchedule, pfp_fan, rht_coil) pfp_terminal.setName("#{zone.name} PFP Term") air_loop.addBranchForZone(zone, pfp_terminal.to_StraightComponent) # Zone sizing sizing_zone = zone.sizingZone sizing_zone.setCoolingDesignAirFlowMethod('DesignDay') sizing_zone.setHeatingDesignAirFlowMethod('DesignDay') sizing_zone.setZoneCoolingDesignSupplyAirTemperature(clg_sa_temp_c) # sizing_zone.setZoneHeatingDesignSupplyAirTemperature(rht_sa_temp_c) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(zone_htg_sa_temp_c) end return air_loop end |
#model_add_refrigeration(model, case_type, cooling_capacity_per_length, length, evaporator_fan_pwr_per_length, lighting_per_length, lighting_sch_name, defrost_pwr_per_length, restocking_sch_name, cop, cop_f_of_t_curve_name, condenser_fan_pwr, condenser_fan_pwr_curve_name, thermal_zone) ⇒ Object
Set compressor properties since prototypes use simple
fix latent case credit curve setter
Should probably use the model_add_refrigeration_walkin
The legacy prototype IDF files use the simplified
Adds a single refrigerated case connected to a rack composed of a single compressor and a single air-cooled condenser.
Refrigeration:CompressorRack object, but this object is not included in OpenStudio. Instead, a detailed rack with similar performance is added. refrigeration rack instead of detailed and lookups from the spreadsheet instead of hard-coded values.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.refrigeration.rb', line 16 def model_add_refrigeration(model, case_type, cooling_capacity_per_length, length, evaporator_fan_pwr_per_length, lighting_per_length, lighting_sch_name, defrost_pwr_per_length, restocking_sch_name, cop, cop_f_of_t_curve_name, condenser_fan_pwr, condenser_fan_pwr_curve_name, thermal_zone) # Default properties based on the case type # case_type = 'Walkin Freezer', 'Display Case' case_temp = nil latent_heat_ratio = nil runtime_fraction = nil fraction_antisweat_to_case = nil under_case_return_air_fraction = nil latent_case_credit_curve_name = nil defrost_type = nil if case_type == 'Walkin Freezer' case_temp = OpenStudio.convert(-9.4, 'F', 'C').get latent_heat_ratio = 0.1 runtime_fraction = 0.4 fraction_antisweat_to_case = 0.0 under_case_return_air_fraction = 0.0 latent_case_credit_curve_name = model_walkin_freezer_latent_case_credit_curve(model) defrost_type = 'Electric' elsif case_type == 'Display Case' case_temp = OpenStudio.convert(35.6, 'F', 'C').get latent_heat_ratio = 0.08 runtime_fraction = 0.85 fraction_antisweat_to_case = 0.2 under_case_return_air_fraction = 0.05 latent_case_credit_curve_name = 'Multi Shelf Vertical Latent Energy Multiplier' defrost_type = 'None' end OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Started Adding Refrigeration System') # Defrost schedule defrost_sch = OpenStudio::Model::ScheduleRuleset.new(model) defrost_sch.setName('Refrigeration Defrost Schedule') defrost_sch.defaultDaySchedule.setName('Refrigeration Defrost Schedule Default') if case_type == 'Walkin Freezer' defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 11, 0, 0), 0) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 11, 20, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 23, 0, 0), 0) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 23, 20, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) elsif case_type == 'Display Case' defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 23, 20, 0), 0) end # Dripdown schedule defrost_dripdown_sch = OpenStudio::Model::ScheduleRuleset.new(model) defrost_dripdown_sch.setName('Refrigeration Defrost DripDown Schedule') defrost_dripdown_sch.defaultDaySchedule.setName('Refrigeration Defrost DripDown Schedule Default') defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 11, 0, 0), 0) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 11, 30, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 23, 0, 0), 0) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 23, 30, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) # Case Credit Schedule case_credit_sch = OpenStudio::Model::ScheduleRuleset.new(model) case_credit_sch.setName('Refrigeration Case Credit Schedule') case_credit_sch.defaultDaySchedule.setName('Refrigeration Case Credit Schedule Default') case_credit_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 7, 0, 0), 0.2) case_credit_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 21, 0, 0), 0.4) case_credit_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0.2) # Case ref_case = OpenStudio::Model::RefrigerationCase.new(model, defrost_sch) ref_case.setName("#{thermal_zone.name} #{case_type}") ref_case.setAvailabilitySchedule(model.alwaysOnDiscreteSchedule) ref_case.setThermalZone(thermal_zone) ref_case.setRatedTotalCoolingCapacityperUnitLength(cooling_capacity_per_length) ref_case.setCaseLength(length) ref_case.(case_temp) ref_case.setStandardCaseFanPowerperUnitLength(evaporator_fan_pwr_per_length) ref_case.(evaporator_fan_pwr_per_length) ref_case.setStandardCaseLightingPowerperUnitLength(lighting_per_length) ref_case.resetInstalledCaseLightingPowerperUnitLength ref_case.setCaseLightingSchedule(model_add_schedule(model, lighting_sch_name)) ref_case.setHumidityatZeroAntiSweatHeaterEnergy(0) unless defrost_type == 'None' ref_case.setCaseDefrostType('Electric') ref_case.setCaseDefrostPowerperUnitLength(defrost_pwr_per_length) ref_case.setCaseDefrostDripDownSchedule(defrost_dripdown_sch) end ref_case.setUnderCaseHVACReturnAirFraction(under_case_return_air_fraction) ref_case.setFractionofAntiSweatHeaterEnergytoCase(fraction_antisweat_to_case) ref_case.resetDesignEvaporatorTemperatureorBrineInletTemperature ref_case.setRatedAmbientTemperature(OpenStudio.convert(75, 'F', 'C').get) ref_case.setRatedLatentHeatRatio(latent_heat_ratio) ref_case.setRatedRuntimeFraction(runtime_fraction) # TODO: enable ref_case.setLatentCaseCreditCurve(model_add_curve(model, latent_case_credit_curve_name)) ref_case.setLatentCaseCreditCurve(model_add_curve(model, latent_case_credit_curve_name)) ref_case.setCaseHeight(0) # TODO: setRefrigeratedCaseRestockingSchedule is not working ref_case.setRefrigeratedCaseRestockingSchedule(model_add_schedule(model, restocking_sch_name)) if case_type == 'Walkin Freezer' ref_case.setCaseCreditFractionSchedule(case_credit_sch) end # Compressor # TODO set compressor properties since prototypes use simple # refrigeration rack instead of detailed compressor = OpenStudio::Model::RefrigerationCompressor.new(model) # Condenser condenser = OpenStudio::Model::RefrigerationCondenserAirCooled.new(model) condenser.setRatedFanPower(condenser_fan_pwr) # Refrigeration system ref_sys = OpenStudio::Model::RefrigerationSystem.new(model) ref_sys.addCompressor(compressor) ref_sys.addCase(ref_case) ref_sys.setRefrigerationCondenser(condenser) ref_sys.setSuctionPipingZone(thermal_zone) OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Finished adding Refrigeration System') return true end |
#model_add_refrigeration_case(model, case_type, case_name, length, thermal_zone) ⇒ Object
Add refrigerated case to the model.
LT Coffin Ice Cream, LT Coffin Frozen Food, LT Reach-In Ice Cream, LT Reach-In Frozen Food, MT Coffin, MT Vertical Open, MT Service, MT Reach-In case is located, and which will be impacted by the case’s thermal load.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.refrigeration.rb', line 165 def model_add_refrigeration_case(model, case_type, case_name, length, thermal_zone) # Get the case properties search_criteria = { 'template' => template, 'case_type' => case_type } props = model_find_object(standards_data['refrigerated_cases'], search_criteria) if props.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.Model.Model', "Could not find refrigerated case properties for: #{search_criteria}.") return nil end # Capacity, defrost, anti-sweat case_temp = props['case_temp'] latent_heat_ratio = props['latent_heat_ratio'] cooling_capacity_per_length = props['cooling_capacity_per_length'] evaporator_fan_pwr_per_length = props['evap_fan_power_per_length'] evapo_temp = props['evap_temp'] lighting_per_length = props['lighting_per_length'] latent_case_credit_curve_name = props['latent_case_credit_curve_name'] defrost_pwr_per_length = props['defrost_power_per_length'] defrost_type = props['defrost_type'] defrost_correction_type = props['defrost_correction_type'] defrost_correction_curve_name = props['defrost_correction_curve_name'] anti_power = props['anti_sweat_power'] runtime_fraction = 0.85 restocking_sch_name = 'Always Off' # Defrost schedule defrost_sch = OpenStudio::Model::ScheduleRuleset.new(model) defrost_sch.setName('Refrigeration Defrost Schedule') defrost_sch.defaultDaySchedule.setName('Refrigeration Defrost Schedule Default') if case_type == 'MT Vertical Open' defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 0, 30, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 6, 0, 0), 0) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 6, 30, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 0, 0), 0) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 30, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 18, 0, 0), 0) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 18, 30, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) elsif case_type == 'MT Service' defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 0, 40, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 6, 0, 0), 0) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 6, 40, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 0, 0), 0) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 40, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 18, 0, 0), 0) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 18, 40, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) else # when 'LT Coffin Frozen Food','LT Coffin Ice Cream','LT Reach-In Ice Cream','LT Reach-In Frozen Food', defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 0, 45, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) end # Dripdown schedule defrost_dripdown_sch = OpenStudio::Model::ScheduleRuleset.new(model) defrost_dripdown_sch.setName('Refrigeration Case Defrost DripDown Schedule') defrost_dripdown_sch.defaultDaySchedule.setName('Refrigeration Defrost DripDown Schedule Default') if case_type == 'MT Vertical Open' defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 0, 40, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 6, 0, 0), 0) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 6, 40, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 0, 0), 0) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 40, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 18, 0, 0), 0) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 18, 40, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) elsif case_type == 'MT Service' defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 0, 50, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 6, 0, 0), 0) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 6, 50, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 0, 0), 0) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 50, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 18, 0, 0), 0) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 18, 50, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) else # when 'LT Coffin Frozen Food','LT Coffin Ice Cream','LT Reach-In Ice Cream','LT Reach-In Frozen Food', defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 0, 55, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) end # Case ref_case = OpenStudio::Model::RefrigerationCase.new(model, defrost_sch) ref_case.setName(case_name.to_s) ref_case.setAvailabilitySchedule(model.alwaysOnDiscreteSchedule) ref_case.setThermalZone(thermal_zone) ref_case.setRatedTotalCoolingCapacityperUnitLength(cooling_capacity_per_length) ref_case.setCaseLength(length) ref_case.(case_temp) ref_case.setStandardCaseFanPowerperUnitLength(evaporator_fan_pwr_per_length) ref_case.(evaporator_fan_pwr_per_length) ref_case.setStandardCaseLightingPowerperUnitLength(lighting_per_length) unless lighting_per_length.nil? ref_case.resetInstalledCaseLightingPowerperUnitLength ref_case.setCaseLightingSchedule(model.alwaysOnDiscreteSchedule) ref_case.setHumidityatZeroAntiSweatHeaterEnergy(anti_power) ref_case.setCaseDefrostType(defrost_type) ref_case.setCaseDefrostPowerperUnitLength(defrost_pwr_per_length) unless defrost_pwr_per_length.nil? ref_case.setCaseDefrostDripDownSchedule(defrost_dripdown_sch) ref_case.setUnderCaseHVACReturnAirFraction(0) ref_case.setFractionofAntiSweatHeaterEnergytoCase(0.7) ref_case.setDesignEvaporatorTemperatureorBrineInletTemperature(evapo_temp) ref_case.setRatedAmbientTemperature(OpenStudio.convert(75, 'F', 'C').get) ref_case.setRatedLatentHeatRatio(latent_heat_ratio) ref_case.setRatedRuntimeFraction(runtime_fraction) ref_case.setLatentCaseCreditCurve(model_add_curve(model, latent_case_credit_curve_name)) ref_case.setCaseHeight(0) ref_case.setRefrigeratedCaseRestockingSchedule(model_add_schedule(model, restocking_sch_name)) ref_case.setDefrostEnergyCorrectionCurveType(defrost_correction_type) ref_case.setDefrostEnergyCorrectionCurve(model_add_curve(model, defrost_correction_curve_name)) length_ft = OpenStudio.convert(length, 'm', 'ft').get OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Added #{length_ft.round} ft #{case_type} called #{case_name} to #{thermal_zone.name}.") return ref_case end |
#model_add_refrigeration_compressor(model, compressor_type) ⇒ Object
Adds a refrigeration compressor to the model.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.refrigeration.rb', line 413 def model_add_refrigeration_compressor(model, compressor_type) # Get the compressor properties search_criteria = { 'template' => template, 'compressor_type' => compressor_type } props = model_find_object(standards_data['refrigeration_compressors'], search_criteria) if props.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.Model.Model', "Could not find refrigeration compressor properties for: #{search_criteria}.") return nil end # Performance curves pwr_curve_name = props['power_curve'] cap_curve_name = props['capacity_curve'] # Make the compressor compressor = OpenStudio::Model::RefrigerationCompressor.new(model) compressor.setRefrigerationCompressorPowerCurve(model_add_curve(model, pwr_curve_name)) compressor.setRefrigerationCompressorCapacityCurve(model_add_curve(model, cap_curve_name)) return compressor end |
#model_add_refrigeration_system(model, compressor_type, sys_name, cases, walkins, thermal_zone) ⇒ Object
Move refrigeration compressors to spreadsheet
Adds a full commercial refrigeration rack, as would be found in a supermarket, to the model.
Low Temp, Med Temp case_type, case_name, length, number_of_cases, and space_names. walkin_type, walkin_name, insulated_floor_area, space_names, and number_of_walkins refrigeration piping is located.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.refrigeration.rb', line 451 def model_add_refrigeration_system(model, compressor_type, sys_name, cases, walkins, thermal_zone) # Refrigeration system ref_sys = OpenStudio::Model::RefrigerationSystem.new(model) ref_sys.setName(sys_name.to_s) ref_sys.setSuctionPipingZone(thermal_zone) OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Adding #{compressor_type} refrigeration system called #{sys_name} with #{cases.size} cases and #{walkins.size} walkins.") # Compressors (20 for each system) for i in 0...20 compressor = model_add_refrigeration_compressor(model, compressor_type) ref_sys.addCompressor(compressor) end # Cases cooling_cap = 0 cases.each do |case_| for i in 0...case_['number_of_cases'] zone = model_get_zones_from_spaces_on_system(model, case_)[0] ref_case = model_add_refrigeration_case(model, case_['case_type'], "#{case_['case_name']} #{i + 1}", case_['length'], zone) ref_sys.addCase(ref_case) cooling_cap += (ref_case.ratedTotalCoolingCapacityperUnitLength * ref_case.caseLength) # calculate total cooling capacity of the cases end end # Walkins walkins.each do |walkin| for i in 0...walkin['number_of_walkins'] zone = model_get_zones_from_spaces_on_system(model, walkin)[0] ref_walkin = model_add_refrigeration_walkin(model, walkin['walkin_type'], "#{walkin['walkin_name']} #{i + 1}", walkin['insulated_floor_area'], zone) cooling_cap += ref_walkin.ratedCoilCoolingCapacity # calculate total cooling capacity of the cases + walkins end end # Condenser capacity # The heat rejection rate from the condenser is equal to the rated capacity of all the display cases and walk-ins connected to the compressor rack # plus the power rating of the compressors making up the compressor rack. # Assuming a COP of 1.3 for low-temperature compressor racks and a COP of 2.0 for medium-temperature compressor racks, # the required condenser capacity is approximated as follows: # Note the factor 1.2 has been included to over-estimate the condenser size. The total capacity of the display cases can be calculated from their rated cooling capacity times the length of the cases. The capacity of each of the walk-ins is specified directly. condensor_cap = if compressor_type == 'Low Temp' 1.2 * cooling_cap * (1 + 1 / 1.3) else 1.2 * cooling_cap * (1 + 1 / 2.0) end condenser_coefficient_2 = condensor_cap / 5.6 condenser_curve = OpenStudio::Model::CurveLinear.new(model) condenser_curve.setCoefficient1Constant(0) condenser_curve.setCoefficient2x(condenser_coefficient_2) condenser_curve.setMinimumValueofx(1.4) condenser_curve.setMaximumValueofx(33.3) # Condenser fan power # The condenser fan power can be estimated from the heat rejection capacity of the condenser as follows: condenser_fan_pwr = 0.0441 * condensor_cap + 695 # Condenser condenser = OpenStudio::Model::RefrigerationCondenserAirCooled.new(model) condenser.setRatedFanPower(condenser_fan_pwr) condenser.setRatedEffectiveTotalHeatRejectionRateCurve(condenser_curve) condenser.setCondenserFanSpeedControlType('Fixed') condenser.setMinimumFanAirFlowRatio(0.1) ref_sys.setRefrigerationCondenser(condenser) return true end |
#model_add_refrigeration_walkin(model, walkin_type, walkin_name, insulated_floor_area, thermal_zone) ⇒ Object
Adds walkin to the model. The following characteristics are defaulted based on user input.
- Rated coil cooling capacity (function of floor area)
- Rated cooling coil fan power (function of cooling capacity)
- Rated total lighting power (function of floor area)
- Defrost power (function of cooling capacity)
Coil fan power and total lighting power are given for both old (2004, 2007, and 2010) and new (2013) walk-ins. It is assumed that only walk-in freezers have electric defrost while walk-in coolers use off-cycle defrost.
Walk-In Freezer, Walk-In Cooler, Walk-In Cooler Glass Door walkin is located, and which will be impacted by the walkin’s thermal load.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.refrigeration.rb', line 298 def model_add_refrigeration_walkin(model, walkin_type, walkin_name, insulated_floor_area, thermal_zone) # Get the walkin properties search_criteria = { 'template' => template, 'walkin_type' => walkin_type } props = model_find_object(standards_data['walkin_refrigeration'], search_criteria) if props.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.Model.Model', "Could not find walkin refrigeration properties for: #{search_criteria}.") return nil end # Capacity, defrost, lighting cooling_capacity_c2 = props['cooling_capacity_c2'] cooling_capacity_c1 = props['cooling_capacity_c1'] cooling_capacity_c0 = props['cooling_capacity_c0'] = props['operating_temp'] source_temp = props['source_temp'] defrost_control_type = props['defrost_control_type'] defrost_type = props['defrost_type'] defrost_power_mult = props['defrost_power_mult'] insulated_floor_u = props['insulated_floor_u'] insulated_surface_u = props['insulated_surface_u'] stocking_door_u = props['insulated_door_u'] reachin_door_area_mult = props['reachin_door_area_mult'] fan_power_mult = props['fan_power_mult'] lighting_power_mult = props['lighting_power_mult'] always_off_name = 'Always Off' # Calculated properties cooling_capacity = cooling_capacity_c2 * (insulated_floor_area ^ 2) + cooling_capacity_c1 * insulated_floor_area + cooling_capacity_c0 defrost_power = defrost_power_mult * cooling_capacity insulated_surface_area = 1.7226 * insulated_floor_area + 28.653 reachin_door_area = reachin_door_area_mult * insulated_floor_area fan_power = fan_power_mult * cooling_capacity lighting_power = lighting_power_mult * insulated_floor_area # Defrost schedule defrost_sch = OpenStudio::Model::ScheduleRuleset.new(model) defrost_sch.setName('Refrigeration WaklIn Defrost Schedule') defrost_sch.defaultDaySchedule.setName('Refrigeration Defrost Schedule Default') if walkin_type == 'Walk-In Freezer' defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 0, 45, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 0, 0), 0) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 45, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) else defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 1, 0, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 0, 0), 0) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 13, 0, 0), 1) defrost_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) end # Dripdown schedule defrost_dripdown_sch = OpenStudio::Model::ScheduleRuleset.new(model) defrost_dripdown_sch.setName('Refrigeration WalkIn Defrost DripDown Schedule') defrost_dripdown_sch.defaultDaySchedule.setName('Refrigeration Defrost DripDown Schedule Default') if walkin_type == 'Walk-In Freezer' defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 0, 55, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 0, 0), 0) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 55, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) else defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 1, 0, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 12, 0, 0), 0) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 13, 0, 0), 1) defrost_dripdown_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) end # Door schedule walkin_door_sch = 'SuperMarket Walk-In Door Sch' # Walk-In ref_walkin = OpenStudio::Model::RefrigerationWalkIn.new(model, defrost_sch) ref_walkin.setName(walkin_name.to_s) ref_walkin.setAvailabilitySchedule(model.alwaysOnDiscreteSchedule) ref_walkin.setRatedCoilCoolingCapacity(cooling_capacity) ref_walkin.() ref_walkin.setRatedCoolingSourceTemperature(source_temp) ref_walkin.setRatedTotalHeatingPower(0) ref_walkin.setHeatingPowerSchedule(model_add_schedule(model, always_off_name)) ref_walkin.setRatedCoolingCoilFanPower(fan_power) ref_walkin.setRatedCirculationFanPower(0) ref_walkin.setRatedTotalLightingPower(lighting_power) ref_walkin.setLightingSchedule(model.alwaysOnDiscreteSchedule) ref_walkin.setDefrostType(defrost_type) ref_walkin.setDefrostControlType(defrost_control_type) ref_walkin.setDefrostSchedule(defrost_sch) ref_walkin.setDefrostDripDownSchedule(defrost_dripdown_sch) ref_walkin.setDefrostPower(defrost_power) ref_walkin.setTemperatureTerminationDefrostFractiontoIce(0.7) ref_walkin.setRestockingSchedule(model_add_schedule(model, always_off_name)) ref_walkin.setInsulatedFloorSurfaceArea(insulated_floor_area) ref_walkin.setInsulatedFloorUValue(insulated_floor_u) ref_walkin.setZoneBoundaryThermalZone(thermal_zone) ref_walkin.setZoneBoundaryTotalInsulatedSurfaceAreaFacingZone(insulated_surface_area) ref_walkin.setZoneBoundaryInsulatedSurfaceUValueFacingZone(insulated_surface_u) ref_walkin.setZoneBoundaryAreaofGlassReachInDoorsFacingZone(reachin_door_area) ref_walkin.setZoneBoundaryHeightofGlassReachInDoorsFacingZone(1.83) ref_walkin.setZoneBoundaryGlassReachInDoorUValueFacingZone(2.27) ref_walkin.setZoneBoundaryAreaofStockingDoorsFacingZone(3.3) ref_walkin.setZoneBoundaryHeightofStockingDoorsFacingZone(2.1) ref_walkin.setZoneBoundaryStockingDoorUValueFacingZone(stocking_door_u) ref_walkin.setZoneBoundaryStockingDoorOpeningScheduleFacingZone(model_add_schedule(model, walkin_door_sch)) insulated_floor_area_ft2 = OpenStudio.convert(insulated_floor_area, 'm^2', 'ft^2').get OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Added #{insulated_floor_area_ft2.round} ft2 #{walkin_type} called #{walkin_name} to #{thermal_zone.name}.") return ref_walkin end |
#model_add_schedule(model, schedule_name) ⇒ ScheduleRuleset
make return an OptionalScheduleRuleset
Create a schedule from the openstudio standards dataset and add it to the model.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2176 def model_add_schedule(model, schedule_name) return nil if schedule_name.nil? || schedule_name == '' # First check model and return schedule if it already exists model.getSchedules.sort.each do |schedule| if schedule.name.get.to_s == schedule_name OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "Already added schedule: #{schedule_name}") return schedule end end require 'date' # OpenStudio::logFree(OpenStudio::Info, 'openstudio.standards.Model', "Adding schedule: #{schedule_name}") # Find all the schedule rules that match the name rules = model_find_objects(standards_data['schedules'], 'name' => schedule_name) if rules.size.zero? OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Cannot find data for schedule: #{schedule_name}, will not be created.") sch_ruleset = OpenStudio::Model::ScheduleRuleset.new(model) sch_ruleset.setName("NOT ACTUALLY #{schedule_name}") return sch_ruleset end # Make a schedule ruleset sch_ruleset = OpenStudio::Model::ScheduleRuleset.new( model ) sch_ruleset.setName(schedule_name.to_s) # Loop through the rules, making one for each row in the spreadsheet rules.each do |rule| day_types = rule['day_types'] start_date = DateTime.parse(rule['start_date']) end_date = DateTime.parse(rule['end_date']) sch_type = rule['type'] values = rule['values'] # Day Type choices: Wkdy, Wknd, Mon, Tue, Wed, Thu, Fri, Sat, Sun, WntrDsn, SmrDsn, Hol # Default if day_types.include?('Default') day_sch = sch_ruleset.defaultDaySchedule day_sch.setName("#{schedule_name} Default") model_add_vals_to_sch(model, day_sch, sch_type, values) end # Winter Design Day if day_types.include?('WntrDsn') day_sch = OpenStudio::Model::ScheduleDay.new(model) sch_ruleset.setWinterDesignDaySchedule(day_sch) day_sch = sch_ruleset.winterDesignDaySchedule day_sch.setName("#{schedule_name} Winter Design Day") model_add_vals_to_sch(model, day_sch, sch_type, values) end # Summer Design Day if day_types.include?('SmrDsn') day_sch = OpenStudio::Model::ScheduleDay.new(model) sch_ruleset.setSummerDesignDaySchedule(day_sch) day_sch = sch_ruleset.summerDesignDaySchedule day_sch.setName("#{schedule_name} Summer Design Day") model_add_vals_to_sch(model, day_sch, sch_type, values) end # Other days (weekdays, weekends, etc) if day_types.include?('Wknd') || day_types.include?('Wkdy') || day_types.include?('Sat') || day_types.include?('Sun') || day_types.include?('Mon') || day_types.include?('Tue') || day_types.include?('Wed') || day_types.include?('Thu') || day_types.include?('Fri') # Make the Rule sch_rule = OpenStudio::Model::ScheduleRule.new(sch_ruleset) day_sch = sch_rule.daySchedule day_sch.setName("#{schedule_name} #{day_types} Day") model_add_vals_to_sch(model, day_sch, sch_type, values) # Set the dates when the rule applies sch_rule.setStartDate(OpenStudio::Date.new(OpenStudio::MonthOfYear.new(start_date.month.to_i), start_date.day.to_i)) sch_rule.setEndDate(OpenStudio::Date.new(OpenStudio::MonthOfYear.new(end_date.month.to_i), end_date.day.to_i)) # Set the days when the rule applies # Weekends if day_types.include?('Wknd') sch_rule.setApplySaturday(true) sch_rule.setApplySunday(true) end # Weekdays if day_types.include?('Wkdy') sch_rule.setApplyMonday(true) sch_rule.setApplyTuesday(true) sch_rule.setApplyWednesday(true) sch_rule.setApplyThursday(true) sch_rule.setApplyFriday(true) end # Individual Days sch_rule.setApplyMonday(true) if day_types.include?('Mon') sch_rule.setApplyTuesday(true) if day_types.include?('Tue') sch_rule.setApplyWednesday(true) if day_types.include?('Wed') sch_rule.setApplyThursday(true) if day_types.include?('Thu') sch_rule.setApplyFriday(true) if day_types.include?('Fri') sch_rule.setApplySaturday(true) if day_types.include?('Sat') sch_rule.setApplySunday(true) if day_types.include?('Sun') end end # Next rule return sch_ruleset end |
#model_add_split_ac(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, fan_type, heating_type, supplemental_heating_type, cooling_type, building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
Creates a split DX AC system for each zone and adds it to the model.
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open Single Speed DX AC, Single Speed Heat Pump
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 2786 def model_add_split_ac(model, sys_name, thermal_zones, hvac_op_sch, oa_damper_sch, fan_type, heating_type, supplemental_heating_type, cooling_type, building_type = nil) thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding split DX AC for #{zone.name}.") end # hvac operation schedule hvac_op_sch = if hvac_op_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, hvac_op_sch) end # oa damper schedule oa_damper_sch = if oa_damper_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, oa_damper_sch) end # OA_controller Maximum OA Fraction schedule econ_max_oa_frac_sch = model_add_schedule(model, 'HotelSmall SAC_Econ_MaxOAFrac_Sch') # Make a SAC for each group of thermal zones parts = [] space_type_names = [] thermal_zones.each do |zone| name = zone.name parts << name.get # get space types zone.spaces.each do |space| space_type_name = space.spaceType.get.standardsSpaceType.get space_type_names << space_type_name end # Zone sizing sizing_zone = zone.sizingZone sizing_zone.setZoneCoolingDesignSupplyAirTemperature(14) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(50.0) sizing_zone.setZoneCoolingDesignSupplyAirHumidityRatio(0.008) sizing_zone.setZoneHeatingDesignSupplyAirHumidityRatio(0.008) end thermal_zone_name = parts.join(' - ') air_loop = OpenStudio::Model::AirLoopHVAC.new(model) air_loop.setName("#{thermal_zone_name} SAC") air_loop.setAvailabilitySchedule(hvac_op_sch) # When an air_loop is contructed, its constructor creates a sizing:system object # the default sizing:system contstructor makes a system:sizing object # appropriate for a multizone VAV system # this systems is a constant volume system with no VAV terminals, # and therfore needs different default settings air_loop_sizing = air_loop.sizingSystem # TODO units air_loop_sizing.setTypeofLoadtoSizeOn('Sensible') air_loop_sizing.autosizeDesignOutdoorAirFlowRate air_loop_sizing.setMinimumSystemAirFlowRatio(1.0) air_loop_sizing.setPreheatDesignTemperature(7.0) air_loop_sizing.setPreheatDesignHumidityRatio(0.008) air_loop_sizing.setPrecoolDesignTemperature(11) air_loop_sizing.setPrecoolDesignHumidityRatio(0.008) air_loop_sizing.setCentralCoolingDesignSupplyAirTemperature(12) air_loop_sizing.setCentralHeatingDesignSupplyAirTemperature(50) air_loop_sizing.setSizingOption('NonCoincident') air_loop_sizing.setAllOutdoorAirinCooling(false) air_loop_sizing.setAllOutdoorAirinHeating(false) air_loop_sizing.setCentralCoolingDesignSupplyAirHumidityRatio(0.008) air_loop_sizing.setCentralHeatingDesignSupplyAirHumidityRatio(0.0080) air_loop_sizing.setCoolingDesignAirFlowMethod('DesignDay') air_loop_sizing.setCoolingDesignAirFlowRate(0.0) air_loop_sizing.setHeatingDesignAirFlowMethod('DesignDay') air_loop_sizing.setHeatingDesignAirFlowRate(0.0) air_loop_sizing.setSystemOutdoorAirMethod('ZoneSum') # Add a setpoint manager single zone reheat to control the # supply air temperature based on the needs of this zone controlzone = thermal_zones[0] setpoint_mgr_single_zone_reheat = OpenStudio::Model::SetpointManagerSingleZoneReheat.new(model) setpoint_mgr_single_zone_reheat.setControlZone(controlzone) # Fan fan = nil if fan_type == 'ConstantVolume' fan = OpenStudio::Model::FanConstantVolume.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{thermal_zone_name} SAC Fan") fan_static_pressure_in_h2o = 2.5 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan.setPressureRise(fan_static_pressure_pa) fan.setFanEfficiency(0.56) # get the average of four fans fan.setMotorEfficiency(0.86) # get the average of four fans elsif fan_type == 'Cycling' fan = OpenStudio::Model::FanOnOff.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{thermal_zone_name} SAC Fan") fan_static_pressure_in_h2o = 2.5 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan.setPressureRise(fan_static_pressure_pa) fan.setFanEfficiency(0.53625) fan.setMotorEfficiency(0.825) end # Heating Coil htg_coil = nil if heating_type == 'Gas' htg_coil = OpenStudio::Model::CoilHeatingGas.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{thermal_zone_name} SAC Gas Htg Coil") htg_coil.setGasBurnerEfficiency(0.8) htg_part_load_fraction_correlation = OpenStudio::Model::CurveCubic.new(model) htg_part_load_fraction_correlation.setCoefficient1Constant(0.8) htg_part_load_fraction_correlation.setCoefficient2x(0.2) htg_part_load_fraction_correlation.setCoefficient3xPOW2(0) htg_part_load_fraction_correlation.setCoefficient4xPOW3(0) htg_part_load_fraction_correlation.setMinimumValueofx(0) htg_part_load_fraction_correlation.setMaximumValueofx(1) htg_coil.setPartLoadFractionCorrelationCurve(htg_part_load_fraction_correlation) elsif heating_type == 'Single Speed Heat Pump' htg_cap_f_of_temp = OpenStudio::Model::CurveCubic.new(model) htg_cap_f_of_temp.setCoefficient1Constant(0.758746) htg_cap_f_of_temp.setCoefficient2x(0.027626) htg_cap_f_of_temp.setCoefficient3xPOW2(0.000148716) htg_cap_f_of_temp.setCoefficient4xPOW3(0.0000034992) htg_cap_f_of_temp.setMinimumValueofx(-20.0) htg_cap_f_of_temp.setMaximumValueofx(20.0) htg_cap_f_of_flow = OpenStudio::Model::CurveCubic.new(model) htg_cap_f_of_flow.setCoefficient1Constant(0.84) htg_cap_f_of_flow.setCoefficient2x(0.16) htg_cap_f_of_flow.setCoefficient3xPOW2(0.0) htg_cap_f_of_flow.setCoefficient4xPOW3(0.0) htg_cap_f_of_flow.setMinimumValueofx(0.5) htg_cap_f_of_flow.setMaximumValueofx(1.5) htg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveCubic.new(model) htg_energy_input_ratio_f_of_temp.setCoefficient1Constant(1.19248) htg_energy_input_ratio_f_of_temp.setCoefficient2x(-0.0300438) htg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(0.00103745) htg_energy_input_ratio_f_of_temp.setCoefficient4xPOW3(-0.000023328) htg_energy_input_ratio_f_of_temp.setMinimumValueofx(-20.0) htg_energy_input_ratio_f_of_temp.setMaximumValueofx(20.0) htg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) htg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.3824) htg_energy_input_ratio_f_of_flow.setCoefficient2x(-0.4336) htg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.0512) htg_energy_input_ratio_f_of_flow.setMinimumValueofx(0.0) htg_energy_input_ratio_f_of_flow.setMaximumValueofx(1.0) htg_part_load_fraction = OpenStudio::Model::CurveQuadratic.new(model) htg_part_load_fraction.setCoefficient1Constant(0.85) htg_part_load_fraction.setCoefficient2x(0.15) htg_part_load_fraction.setCoefficient3xPOW2(0.0) htg_part_load_fraction.setMinimumValueofx(0.0) htg_part_load_fraction.setMaximumValueofx(1.0) htg_coil = OpenStudio::Model::CoilHeatingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, htg_cap_f_of_temp, htg_cap_f_of_flow, htg_energy_input_ratio_f_of_temp, htg_energy_input_ratio_f_of_flow, htg_part_load_fraction) htg_coil.setName("#{thermal_zone_name} SAC HP Htg Coil") end # Supplemental Heating Coil supplemental_htg_coil = nil if supplemental_heating_type == 'Electric' supplemental_htg_coil = OpenStudio::Model::CoilHeatingGas.new(model, model.alwaysOnDiscreteSchedule) supplemental_htg_coil.setName("#{thermal_zone_name} PSZ-AC Electric Backup Htg Coil") elsif supplemental_heating_type == 'Gas' supplemental_htg_coil = OpenStudio::Model::CoilHeatingGas.new(model, model.alwaysOnDiscreteSchedule) supplemental_htg_coil.setName("#{thermal_zone_name} PSZ-AC Gas Backup Htg Coil") end # Cooling Coil clg_coil = nil if cooling_type == 'Two Speed DX AC' clg_cap_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp.setCoefficient1Constant(0.42415) clg_cap_f_of_temp.setCoefficient2x(0.04426) clg_cap_f_of_temp.setCoefficient3xPOW2(-0.00042) clg_cap_f_of_temp.setCoefficient4y(0.00333) clg_cap_f_of_temp.setCoefficient5yPOW2(-0.00008) clg_cap_f_of_temp.setCoefficient6xTIMESY(-0.00021) clg_cap_f_of_temp.setMinimumValueofx(17.0) clg_cap_f_of_temp.setMaximumValueofx(22.0) clg_cap_f_of_temp.setMinimumValueofy(13.0) clg_cap_f_of_temp.setMaximumValueofy(46.0) clg_cap_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_cap_f_of_flow.setCoefficient1Constant(0.77136) clg_cap_f_of_flow.setCoefficient2x(0.34053) clg_cap_f_of_flow.setCoefficient3xPOW2(-0.11088) clg_cap_f_of_flow.setMinimumValueofx(0.75918) clg_cap_f_of_flow.setMaximumValueofx(1.13877) clg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp.setCoefficient1Constant(1.23649) clg_energy_input_ratio_f_of_temp.setCoefficient2x(-0.02431) clg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(0.00057) clg_energy_input_ratio_f_of_temp.setCoefficient4y(-0.01434) clg_energy_input_ratio_f_of_temp.setCoefficient5yPOW2(0.00063) clg_energy_input_ratio_f_of_temp.setCoefficient6xTIMESY(-0.00038) clg_energy_input_ratio_f_of_temp.setMinimumValueofx(17.0) clg_energy_input_ratio_f_of_temp.setMaximumValueofx(22.0) clg_energy_input_ratio_f_of_temp.setMinimumValueofy(13.0) clg_energy_input_ratio_f_of_temp.setMaximumValueofy(46.0) clg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.20550) clg_energy_input_ratio_f_of_flow.setCoefficient2x(-0.32953) clg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.12308) clg_energy_input_ratio_f_of_flow.setMinimumValueofx(0.75918) clg_energy_input_ratio_f_of_flow.setMaximumValueofx(1.13877) clg_part_load_ratio = OpenStudio::Model::CurveQuadratic.new(model) clg_part_load_ratio.setCoefficient1Constant(0.77100) clg_part_load_ratio.setCoefficient2x(0.22900) clg_part_load_ratio.setCoefficient3xPOW2(0.0) clg_part_load_ratio.setMinimumValueofx(0.0) clg_part_load_ratio.setMaximumValueofx(1.0) clg_cap_f_of_temp_low_spd = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp_low_spd.setCoefficient1Constant(0.42415) clg_cap_f_of_temp_low_spd.setCoefficient2x(0.04426) clg_cap_f_of_temp_low_spd.setCoefficient3xPOW2(-0.00042) clg_cap_f_of_temp_low_spd.setCoefficient4y(0.00333) clg_cap_f_of_temp_low_spd.setCoefficient5yPOW2(-0.00008) clg_cap_f_of_temp_low_spd.setCoefficient6xTIMESY(-0.00021) clg_cap_f_of_temp_low_spd.setMinimumValueofx(17.0) clg_cap_f_of_temp_low_spd.setMaximumValueofx(22.0) clg_cap_f_of_temp_low_spd.setMinimumValueofy(13.0) clg_cap_f_of_temp_low_spd.setMaximumValueofy(46.0) clg_energy_input_ratio_f_of_temp_low_spd = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient1Constant(1.23649) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient2x(-0.02431) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient3xPOW2(0.00057) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient4y(-0.01434) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient5yPOW2(0.00063) clg_energy_input_ratio_f_of_temp_low_spd.setCoefficient6xTIMESY(-0.00038) clg_energy_input_ratio_f_of_temp_low_spd.setMinimumValueofx(17.0) clg_energy_input_ratio_f_of_temp_low_spd.setMaximumValueofx(22.0) clg_energy_input_ratio_f_of_temp_low_spd.setMinimumValueofy(13.0) clg_energy_input_ratio_f_of_temp_low_spd.setMaximumValueofy(46.0) clg_coil = OpenStudio::Model::CoilCoolingDXTwoSpeed.new(model, model.alwaysOnDiscreteSchedule, clg_cap_f_of_temp, clg_cap_f_of_flow, clg_energy_input_ratio_f_of_temp, clg_energy_input_ratio_f_of_flow, clg_part_load_ratio, clg_cap_f_of_temp_low_spd, clg_energy_input_ratio_f_of_temp_low_spd) clg_coil.setName("#{thermal_zone_name} SAC 2spd DX AC Clg Coil") clg_coil.setRatedLowSpeedSensibleHeatRatio(OpenStudio::OptionalDouble.new(0.69)) clg_coil.setBasinHeaterCapacity(10) clg_coil.setBasinHeaterSetpointTemperature(2.0) elsif cooling_type == 'Single Speed DX AC' clg_cap_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp.setCoefficient1Constant(0.942587793) clg_cap_f_of_temp.setCoefficient2x(0.009543347) clg_cap_f_of_temp.setCoefficient3xPOW2(0.00068377) clg_cap_f_of_temp.setCoefficient4y(-0.011042676) clg_cap_f_of_temp.setCoefficient5yPOW2(0.000005249) clg_cap_f_of_temp.setCoefficient6xTIMESY(-0.00000972) clg_cap_f_of_temp.setMinimumValueofx(12.77778) clg_cap_f_of_temp.setMaximumValueofx(23.88889) clg_cap_f_of_temp.setMinimumValueofy(23.88889) clg_cap_f_of_temp.setMaximumValueofy(46.11111) clg_cap_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_cap_f_of_flow.setCoefficient1Constant(0.8) clg_cap_f_of_flow.setCoefficient2x(0.2) clg_cap_f_of_flow.setCoefficient3xPOW2(0) clg_cap_f_of_flow.setMinimumValueofx(0.5) clg_cap_f_of_flow.setMaximumValueofx(1.5) clg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp.setCoefficient1Constant(0.342414409) clg_energy_input_ratio_f_of_temp.setCoefficient2x(0.034885008) clg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(-0.0006237) clg_energy_input_ratio_f_of_temp.setCoefficient4y(0.004977216) clg_energy_input_ratio_f_of_temp.setCoefficient5yPOW2(0.000437951) clg_energy_input_ratio_f_of_temp.setCoefficient6xTIMESY(-0.000728028) clg_energy_input_ratio_f_of_temp.setMinimumValueofx(12.77778) clg_energy_input_ratio_f_of_temp.setMaximumValueofx(23.88889) clg_energy_input_ratio_f_of_temp.setMinimumValueofy(23.88889) clg_energy_input_ratio_f_of_temp.setMaximumValueofy(46.11111) clg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.1552) clg_energy_input_ratio_f_of_flow.setCoefficient2x(-0.1808) clg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.0256) clg_energy_input_ratio_f_of_flow.setMinimumValueofx(0.5) clg_energy_input_ratio_f_of_flow.setMaximumValueofx(1.5) clg_part_load_ratio = OpenStudio::Model::CurveQuadratic.new(model) clg_part_load_ratio.setCoefficient1Constant(0.85) clg_part_load_ratio.setCoefficient2x(0.15) clg_part_load_ratio.setCoefficient3xPOW2(0.0) clg_part_load_ratio.setMinimumValueofx(0.0) clg_part_load_ratio.setMaximumValueofx(1.0) clg_part_load_ratio.setMinimumCurveOutput(0.7) clg_part_load_ratio.setMaximumCurveOutput(1.0) clg_coil = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, clg_cap_f_of_temp, clg_cap_f_of_flow, clg_energy_input_ratio_f_of_temp, clg_energy_input_ratio_f_of_flow, clg_part_load_ratio) clg_coil.setName("#{thermal_zone_name} SAC 1spd DX AC Clg Coil") elsif cooling_type == 'Single Speed Heat Pump' clg_cap_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_cap_f_of_temp.setCoefficient1Constant(0.766956) clg_cap_f_of_temp.setCoefficient2x(0.0107756) clg_cap_f_of_temp.setCoefficient3xPOW2(-0.0000414703) clg_cap_f_of_temp.setCoefficient4y(0.00134961) clg_cap_f_of_temp.setCoefficient5yPOW2(-0.000261144) clg_cap_f_of_temp.setCoefficient6xTIMESY(0.000457488) clg_cap_f_of_temp.setMinimumValueofx(12.78) clg_cap_f_of_temp.setMaximumValueofx(23.89) clg_cap_f_of_temp.setMinimumValueofy(21.1) clg_cap_f_of_temp.setMaximumValueofy(46.1) clg_cap_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_cap_f_of_flow.setCoefficient1Constant(0.8) clg_cap_f_of_flow.setCoefficient2x(0.2) clg_cap_f_of_flow.setCoefficient3xPOW2(0.0) clg_cap_f_of_flow.setMinimumValueofx(0.5) clg_cap_f_of_flow.setMaximumValueofx(1.5) clg_energy_input_ratio_f_of_temp = OpenStudio::Model::CurveBiquadratic.new(model) clg_energy_input_ratio_f_of_temp.setCoefficient1Constant(0.297145) clg_energy_input_ratio_f_of_temp.setCoefficient2x(0.0430933) clg_energy_input_ratio_f_of_temp.setCoefficient3xPOW2(-0.000748766) clg_energy_input_ratio_f_of_temp.setCoefficient4y(0.00597727) clg_energy_input_ratio_f_of_temp.setCoefficient5yPOW2(0.000482112) clg_energy_input_ratio_f_of_temp.setCoefficient6xTIMESY(-0.000956448) clg_energy_input_ratio_f_of_temp.setMinimumValueofx(12.78) clg_energy_input_ratio_f_of_temp.setMaximumValueofx(23.89) clg_energy_input_ratio_f_of_temp.setMinimumValueofy(21.1) clg_energy_input_ratio_f_of_temp.setMaximumValueofy(46.1) clg_energy_input_ratio_f_of_flow = OpenStudio::Model::CurveQuadratic.new(model) clg_energy_input_ratio_f_of_flow.setCoefficient1Constant(1.156) clg_energy_input_ratio_f_of_flow.setCoefficient2x(-0.1816) clg_energy_input_ratio_f_of_flow.setCoefficient3xPOW2(0.0256) clg_energy_input_ratio_f_of_flow.setMinimumValueofx(0.5) clg_energy_input_ratio_f_of_flow.setMaximumValueofx(1.5) clg_part_load_ratio = OpenStudio::Model::CurveQuadratic.new(model) clg_part_load_ratio.setCoefficient1Constant(0.85) clg_part_load_ratio.setCoefficient2x(0.15) clg_part_load_ratio.setCoefficient3xPOW2(0.0) clg_part_load_ratio.setMinimumValueofx(0.0) clg_part_load_ratio.setMaximumValueofx(1.0) clg_coil = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, clg_cap_f_of_temp, clg_cap_f_of_flow, clg_energy_input_ratio_f_of_temp, clg_energy_input_ratio_f_of_flow, clg_part_load_ratio) clg_coil.setName("#{thermal_zone_name} SAC 1spd DX HP Clg Coil") # clg_coil.setRatedSensibleHeatRatio(0.69) # clg_coil.setBasinHeaterCapacity(10) # clg_coil.setBasinHeaterSetpointTemperature(2.0) end oa_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_controller.setName("#{thermal_zone_name} SAC OA Sys Controller") oa_controller.setMinimumOutdoorAirSchedule(oa_damper_sch) oa_controller.autosizeMinimumOutdoorAirFlowRate oa_controller.setMaximumFractionofOutdoorAirSchedule(econ_max_oa_frac_sch) oa_system = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_controller) oa_system.setName("#{thermal_zone_name} SAC OA Sys") # Add the components to the air loop # in order from closest to zone to furthest from zone supply_inlet_node = air_loop.supplyInletNode # Add the fan unless fan.nil? fan.addToNode(supply_inlet_node) end # Add the supplemental heating coil unless supplemental_htg_coil.nil? supplemental_htg_coil.addToNode(supply_inlet_node) end # Add the heating coil unless htg_coil.nil? htg_coil.addToNode(supply_inlet_node) end # Add the cooling coil unless clg_coil.nil? clg_coil.addToNode(supply_inlet_node) end setpoint_mgr_single_zone_reheat.setMinimumSupplyAirTemperature(OpenStudio.convert(55.4, 'F', 'C').get) setpoint_mgr_single_zone_reheat.setMaximumSupplyAirTemperature(OpenStudio.convert(113, 'F', 'C').get) setpoint_mgr_single_zone_reheat.addToNode(air_loop.supplyOutletNode) # Add the OA system oa_system.addToNode(supply_inlet_node) # Create a diffuser and attach the zone/diffuser pair to the air loop thermal_zones.each do |zone| diffuser = OpenStudio::Model::AirTerminalSingleDuctUncontrolled.new(model, model.alwaysOnDiscreteSchedule) diffuser.setName("#{zone.name} SAC Diffuser") air_loop.addBranchForZone(zone, diffuser.to_StraightComponent) end return air_loop end |
#model_add_swh(model, building_type, climate_zone, prototype_input, epw_file) ⇒ Object
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.Model.swh.rb', line 2 def model_add_swh(model, building_type, climate_zone, prototype_input, epw_file) OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Started Adding Service Water Heating') # Add the main service water heating loop, if specified unless prototype_input['main_water_heater_volume'].nil? swh_fueltype = prototype_input['main_water_heater_fuel'] # Add the main service water loop unless building_type == 'RetailStripmall' && template != 'NECB2011' main_swh_loop = model_add_swh_loop(model, 'Main Service Water Loop', nil, OpenStudio.convert(prototype_input['main_service_water_temperature'], 'F', 'C').get, prototype_input['main_service_water_pump_head'], prototype_input['main_service_water_pump_motor_efficiency'], OpenStudio.convert(prototype_input['main_water_heater_capacity'], 'Btu/hr', 'W').get, OpenStudio.convert(prototype_input['main_water_heater_volume'], 'gal', 'm^3').get, swh_fueltype, OpenStudio.convert(prototype_input['main_service_water_parasitic_fuel_consumption_rate'], 'Btu/hr', 'W').get, building_type) end # Attach the end uses if specified in prototype inputs # TODO remove special logic for large office SWH end uses # TODO remove special logic for stripmall SWH end uses and service water loops # TODO remove special logic for large hotel SWH end uses if building_type == 'LargeOffice' && template != 'NECB2011' # Only the core spaces have service water ['Core_bottom', 'Core_mid', 'Core_top'].sort.each do |space_name| # ['Mechanical_Bot_ZN_1','Mechanical_Mid_ZN_1','Mechanical_Top_ZN_1'].each do |space_name| # for new space type large office model_add_swh_end_uses(model, 'Main', main_swh_loop, OpenStudio.convert(prototype_input['main_service_water_peak_flowrate'], 'gal/min', 'm^3/s').get, prototype_input['main_service_water_flowrate_schedule'], OpenStudio.convert(prototype_input['main_water_use_temperature'], 'F', 'C').get, space_name, building_type) end elsif building_type == 'LargeOfficeDetail' && template != 'NECB2011' # Only mechanical rooms have service water ['Mechanical_Bot_ZN_1', 'Mechanical_Mid_ZN_1', 'Mechanical_Top_ZN_1'].sort.each do |space_name| # for new space type large office model_add_swh_end_uses(model, 'Main', main_swh_loop, OpenStudio.convert(prototype_input['main_service_water_peak_flowrate'], 'gal/min', 'm^3/s').get, prototype_input['main_service_water_flowrate_schedule'], OpenStudio.convert(prototype_input['main_water_use_temperature'], 'F', 'C').get, space_name, building_type) end elsif building_type == 'RetailStripmall' && template != 'NECB2011' return true if template == 'DOE Ref Pre-1980' || template == 'DOE Ref 1980-2004' # Create a separate hot water loop & water heater for each space in the list swh_space_names = ['LGstore1', 'SMstore1', 'SMstore2', 'SMstore3', 'LGstore2', 'SMstore5', 'SMstore6'] swh_sch_names = ['RetailStripmall Type1_SWH_SCH', 'RetailStripmall Type1_SWH_SCH', 'RetailStripmall Type2_SWH_SCH', 'RetailStripmall Type2_SWH_SCH', 'RetailStripmall Type3_SWH_SCH', 'RetailStripmall Type3_SWH_SCH', 'RetailStripmall Type3_SWH_SCH'] rated_use_rate_gal_per_min = 0.03 # in gal/min rated_flow_rate_m3_per_s = OpenStudio.convert(rated_use_rate_gal_per_min, 'gal/min', 'm^3/s').get # Loop through all spaces swh_space_names.zip(swh_sch_names).sort.each do |swh_space_name, swh_sch_name| swh_thermal_zone = model.getSpaceByName(swh_space_name).get.thermalZone.get main_swh_loop = model_add_swh_loop(model, "#{swh_thermal_zone.name} Service Water Loop", swh_thermal_zone, OpenStudio.convert(prototype_input['main_service_water_temperature'], 'F', 'C').get, prototype_input['main_service_water_pump_head'], prototype_input['main_service_water_pump_motor_efficiency'], OpenStudio.convert(prototype_input['main_water_heater_capacity'], 'Btu/hr', 'W').get, OpenStudio.convert(prototype_input['main_water_heater_volume'], 'gal', 'm^3').get, prototype_input['main_water_heater_fuel'], OpenStudio.convert(prototype_input['main_service_water_parasitic_fuel_consumption_rate'], 'Btu/hr', 'W').get, building_type) model_add_swh_end_uses(model, 'Main', main_swh_loop, rated_flow_rate_m3_per_s, swh_sch_name, OpenStudio.convert(prototype_input['main_water_use_temperature'], 'F', 'C').get, swh_space_name, building_type) end elsif prototype_input['main_service_water_peak_flowrate'] OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Model', 'Adding shw by main_service_water_peak_flowrate') # Attaches the end uses if specified as a lump value in the prototype_input model_add_swh_end_uses(model, 'Main', main_swh_loop, OpenStudio.convert(prototype_input['main_service_water_peak_flowrate'], 'gal/min', 'm^3/s').get, prototype_input['main_service_water_flowrate_schedule'], OpenStudio.convert(prototype_input['main_water_use_temperature'], 'F', 'C').get, nil, building_type) else OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Model', 'Adding shw by space_type_map') # Attaches the end uses if specified by space type space_type_map = @space_type_map if template == 'NECB2011' building_type = 'Space Function' end # Log how many water fixtures are added water_fixtures = [] # Loop through spaces types and add service hot water if specified space_type_map.sort.each do |space_type_name, space_names| search_criteria = { 'template' => template, 'building_type' => model_get_lookup_name(building_type), 'space_type' => space_type_name } data = model_find_object(standards_data['space_types'], search_criteria) # Skip space types with no data next if data.nil? # Skip space types with no water use, unless it is a NECB archetype (these do not have peak flow rates defined) next unless template == 'NECB2011' || !data['service_water_heating_peak_flow_rate'].nil? || !data['service_water_heating_peak_flow_per_area'].nil? # Add a service water use for each space space_names.sort.each do |space_name| space = model.getSpaceByName(space_name).get space_multiplier = nil space_multiplier = case template when 'NECB2011' # Added this to prevent double counting of zone multipliers.. space multipliers are never used in NECB archtypes. 1 else space.multiplier end water_fixture = model_add_swh_end_uses_by_space(model, model_get_lookup_name(building_type), climate_zone, main_swh_loop, space_type_name, space_name, space_multiplier) if !water_fixture.nil? water_fixtures << water_fixture end end end OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Added #{water_fixtures.size} water fixtures to model") end end # Add the booster water heater, if specified unless prototype_input['booster_water_heater_volume'].nil? # Add the booster water loop swh_booster_loop = model_add_swh_booster(model, main_swh_loop, OpenStudio.convert(prototype_input['booster_water_heater_capacity'], 'Btu/hr', 'W').get, OpenStudio.convert(prototype_input['booster_water_heater_volume'], 'gal', 'm^3').get, prototype_input['booster_water_heater_fuel'], OpenStudio.convert(prototype_input['booster_water_temperature'], 'F', 'C').get, 0, nil, building_type) # Attach the end uses model_add_booster_swh_end_uses(model, swh_booster_loop, OpenStudio.convert(prototype_input['booster_service_water_peak_flowrate'], 'gal/min', 'm^3/s').get, prototype_input['booster_service_water_flowrate_schedule'], OpenStudio.convert(prototype_input['booster_water_use_temperature'], 'F', 'C').get, building_type) end # Add the laundry water heater, if specified unless prototype_input['laundry_water_heater_volume'].nil? # Add the laundry service water heating loop laundry_swh_loop = model_add_swh_loop(model, 'Laundry Service Water Loop', nil, OpenStudio.convert(prototype_input['laundry_service_water_temperature'], 'F', 'C').get, prototype_input['laundry_service_water_pump_head'], prototype_input['laundry_service_water_pump_motor_efficiency'], OpenStudio.convert(prototype_input['laundry_water_heater_capacity'], 'Btu/hr', 'W').get, OpenStudio.convert(prototype_input['laundry_water_heater_volume'], 'gal', 'm^3').get, prototype_input['laundry_water_heater_fuel'], OpenStudio.convert(prototype_input['laundry_service_water_parasitic_fuel_consumption_rate'], 'Btu/hr', 'W').get, building_type) # Attach the end uses if specified in prototype inputs model_add_swh_end_uses(model, 'Laundry', laundry_swh_loop, OpenStudio.convert(prototype_input['laundry_service_water_peak_flowrate'], 'gal/min', 'm^3/s').get, prototype_input['laundry_service_water_flowrate_schedule'], OpenStudio.convert(prototype_input['laundry_water_use_temperature'], 'F', 'C').get, nil, building_type) end OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Finished adding Service Water Heating') return true end |
#model_add_swh_booster(model, main_service_water_loop, water_heater_capacity, water_heater_volume, water_heater_fuel, booster_water_temperature, parasitic_fuel_consumption_rate, booster_water_heater_thermal_zone, building_type = nil) ⇒ OpenStudio::Model::PlantLoop
Creates a booster water heater and attaches it to the supplied service water heating loop.
the main service water loop that this booster assists. Gas, Electric fuel consumption rate, in W zones to place water heater in. If nil, will be assumed in 70F air for heat loss. the resulting booster water loop.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4268 def model_add_swh_booster(model, main_service_water_loop, water_heater_capacity, water_heater_volume, water_heater_fuel, booster_water_temperature, parasitic_fuel_consumption_rate, booster_water_heater_thermal_zone, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding booster water heater to #{main_service_water_loop.name}") # Booster water heating loop booster_service_water_loop = OpenStudio::Model::PlantLoop.new(model) booster_service_water_loop.setName('Service Water Loop') # Temperature schedule type limits temp_sch_type_limits = OpenStudio::Model::ScheduleTypeLimits.new(model) temp_sch_type_limits.setName('Temperature Schedule Type Limits') temp_sch_type_limits.setLowerLimitValue(0.0) temp_sch_type_limits.setUpperLimitValue(100.0) temp_sch_type_limits.setNumericType('Continuous') temp_sch_type_limits.setUnitType('Temperature') # Service water heating loop controls swh_temp_c = booster_water_temperature swh_temp_f = OpenStudio.convert(swh_temp_c, 'C', 'F').get swh_delta_t_r = 9 # 9F delta-T swh_delta_t_k = OpenStudio.convert(swh_delta_t_r, 'R', 'K').get swh_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) swh_temp_sch.setName("Service Water Booster Temp - #{swh_temp_f}F") swh_temp_sch.defaultDaySchedule.setName("Service Water Booster Temp - #{swh_temp_f}F Default") swh_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), swh_temp_c) swh_temp_sch.setScheduleTypeLimits(temp_sch_type_limits) swh_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, swh_temp_sch) swh_stpt_manager.setName('Hot water booster setpoint manager') swh_stpt_manager.addToNode(booster_service_water_loop.supplyOutletNode) sizing_plant = booster_service_water_loop.sizingPlant sizing_plant.setLoopType('Heating') sizing_plant.setDesignLoopExitTemperature(swh_temp_c) sizing_plant.setLoopDesignTemperatureDifference(swh_delta_t_k) # Booster water heating pump swh_pump = OpenStudio::Model::PumpConstantSpeed.new(model) swh_pump.setName('Booster Water Loop Pump') swh_pump_head_press_pa = 0.0 # As if there is no circulation pump swh_pump.setRatedPumpHead(swh_pump_head_press_pa) swh_pump.setMotorEfficiency(1) swh_pump.setPumpControlType('Intermittent') swh_pump.addToNode(booster_service_water_loop.supplyInletNode) # Water heater # TODO Standards - Change water heater methodology to follow # 'Model Enhancements Appendix A.' water_heater_capacity_btu_per_hr = OpenStudio.convert(water_heater_capacity, 'W', 'Btu/hr').get water_heater_capacity_kbtu_per_hr = OpenStudio.convert(water_heater_capacity_btu_per_hr, 'Btu/hr', 'kBtu/hr').get water_heater_vol_gal = OpenStudio.convert(water_heater_volume, 'm^3', 'gal').get # Water heater depends on the fuel type water_heater = OpenStudio::Model::WaterHeaterMixed.new(model) water_heater.setName("#{water_heater_vol_gal}gal #{water_heater_fuel} Booster Water Heater - #{water_heater_capacity_kbtu_per_hr.round}kBtu/hr") water_heater.setTankVolume(OpenStudio.convert(water_heater_vol_gal, 'gal', 'm^3').get) water_heater.setSetpointTemperatureSchedule(swh_temp_sch) if booster_water_heater_thermal_zone.nil? # Assume the water heater is indoors at 70F for now default_water_heater_ambient_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) default_water_heater_ambient_temp_sch.setName('Water Heater Ambient Temp Schedule - 70F') default_water_heater_ambient_temp_sch.defaultDaySchedule.setName('Water Heater Ambient Temp Schedule - 70F Default') default_water_heater_ambient_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), OpenStudio.convert(70, 'F', 'C').get) default_water_heater_ambient_temp_sch.setScheduleTypeLimits(temp_sch_type_limits) water_heater.setAmbientTemperatureIndicator('Schedule') water_heater.setAmbientTemperatureSchedule(default_water_heater_ambient_temp_sch) else water_heater.setAmbientTemperatureIndicator('ThermalZone') water_heater.setAmbientTemperatureThermalZone booster_water_heater_thermal_zone end water_heater.setMaximumTemperatureLimit(OpenStudio.convert(180, 'F', 'C').get) water_heater.setDeadbandTemperatureDifference(OpenStudio.convert(3.6, 'R', 'K').get) water_heater.setHeaterControlType('Cycle') water_heater.setHeaterMaximumCapacity(OpenStudio.convert(water_heater_capacity_btu_per_hr, 'Btu/hr', 'W').get) water_heater.setOffCycleParasiticHeatFractiontoTank(0.8) water_heater.setIndirectWaterHeatingRecoveryTime(1.5) # 1.5hrs if water_heater_fuel == 'Electricity' water_heater.setHeaterFuelType('Electricity') water_heater.setHeaterThermalEfficiency(1.0) water_heater.setOffCycleParasiticFuelConsumptionRate(parasitic_fuel_consumption_rate) water_heater.setOnCycleParasiticFuelConsumptionRate(parasitic_fuel_consumption_rate) water_heater.setOffCycleParasiticFuelType('Electricity') water_heater.setOnCycleParasiticFuelType('Electricity') water_heater.setOffCycleLossCoefficienttoAmbientTemperature(1.053) water_heater.setOnCycleLossCoefficienttoAmbientTemperature(1.053) elsif water_heater_fuel == 'Natural Gas' water_heater.setHeaterFuelType('Gas') water_heater.setHeaterThermalEfficiency(0.8) water_heater.setOffCycleParasiticFuelConsumptionRate(parasitic_fuel_consumption_rate) water_heater.setOnCycleParasiticFuelConsumptionRate(parasitic_fuel_consumption_rate) water_heater.setOffCycleParasiticFuelType('Gas') water_heater.setOnCycleParasiticFuelType('Gas') water_heater.setOffCycleLossCoefficienttoAmbientTemperature(6.0) water_heater.setOnCycleLossCoefficienttoAmbientTemperature(6.0) end if water_heater_fuel == 'Electricity' water_heater.setHeaterFuelType('Electricity') water_heater.setOffCycleParasiticFuelType('Electricity') water_heater.setOnCycleParasiticFuelType('Electricity') elsif water_heater_fuel == 'Natural Gas' water_heater.setHeaterFuelType('Gas') water_heater.setOffCycleParasiticFuelType('Gas') water_heater.setOnCycleParasiticFuelType('Gas') end booster_service_water_loop.addSupplyBranchForComponent(water_heater) # Service water heating loop bypass pipes water_heater_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) booster_service_water_loop.addSupplyBranchForComponent(water_heater_bypass_pipe) coil_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) booster_service_water_loop.addDemandBranchForComponent(coil_bypass_pipe) supply_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) supply_outlet_pipe.addToNode(booster_service_water_loop.supplyOutletNode) demand_inlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_inlet_pipe.addToNode(booster_service_water_loop.demandInletNode) demand_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_outlet_pipe.addToNode(booster_service_water_loop.demandOutletNode) # Heat exchanger to supply the booster water heater # with normal hot water from the main service water loop. hx = OpenStudio::Model::HeatExchangerFluidToFluid.new(model) hx.setName('HX for Booster Water Heating') hx.setHeatExchangeModelType('Ideal') hx.setControlType('UncontrolledOn') hx.setHeatTransferMeteringEndUseType('LoopToLoop') # Add the HX to the supply side of the booster loop hx.addToNode(booster_service_water_loop.supplyInletNode) # Add the HX to the demand side of # the main service water loop. main_service_water_loop.addDemandBranchForComponent(hx) return booster_service_water_loop end |
#model_add_swh_end_uses(model, use_name, swh_loop, peak_flowrate, flowrate_schedule, water_use_temperature, space_name, building_type = nil) ⇒ OpenStudio::Model::WaterUseEquipment
Creates water fixtures and attaches them to the supplied service water loop.
to the newly created fixture. the main service water loop to add water fixtures to. or nil, in which case it will not be assigned to any particular space. the resulting water fixture.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4428 def model_add_swh_end_uses(model, use_name, swh_loop, peak_flowrate, flowrate_schedule, water_use_temperature, space_name, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding water fixture to #{swh_loop.name}.") # Water use connection swh_connection = OpenStudio::Model::WaterUseConnections.new(model) # Water fixture definition water_fixture_def = OpenStudio::Model::WaterUseEquipmentDefinition.new(model) rated_flow_rate_m3_per_s = peak_flowrate rated_flow_rate_gal_per_min = OpenStudio.convert(rated_flow_rate_m3_per_s, 'm^3/s', 'gal/min').get frac_sensible = 0.2 frac_latent = 0.05 # water_use_sensible_frac_sch = OpenStudio::Model::ScheduleConstant.new(self) # water_use_sensible_frac_sch.setValue(0.2) # water_use_latent_frac_sch = OpenStudio::Model::ScheduleConstant.new(self) # water_use_latent_frac_sch.setValue(0.05) water_use_sensible_frac_sch = OpenStudio::Model::ScheduleRuleset.new(model) water_use_sensible_frac_sch.setName("Fraction Sensible - #{frac_sensible}") water_use_sensible_frac_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), frac_sensible) water_use_latent_frac_sch = OpenStudio::Model::ScheduleRuleset.new(model) water_use_latent_frac_sch.setName("Fraction Latent - #{frac_latent}") water_use_latent_frac_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), frac_latent) water_fixture_def.setSensibleFractionSchedule(water_use_sensible_frac_sch) water_fixture_def.setLatentFractionSchedule(water_use_latent_frac_sch) water_fixture_def.setPeakFlowRate(rated_flow_rate_m3_per_s) water_fixture_def.setName("#{use_name.capitalize} Service Water Use Def #{rated_flow_rate_gal_per_min.round(2)}gal/min") # Target mixed water temperature mixed_water_temp_f = OpenStudio.convert(water_use_temperature, 'C', 'F').get mixed_water_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) mixed_water_temp_sch.setName("Mixed Water At Faucet Temp - #{mixed_water_temp_f.round}F") mixed_water_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), OpenStudio.convert(mixed_water_temp_f, 'F', 'C').get) water_fixture_def.setTargetTemperatureSchedule(mixed_water_temp_sch) # Water use equipment water_fixture = OpenStudio::Model::WaterUseEquipment.new(water_fixture_def) schedule = model_add_schedule(model, flowrate_schedule) water_fixture.setFlowRateFractionSchedule(schedule) if space_name.nil? water_fixture.setName("#{use_name.capitalize} Service Water Use #{rated_flow_rate_gal_per_min.round(2)}gal/min") else water_fixture.setName("#{space_name.capitalize} Service Water Use #{rated_flow_rate_gal_per_min.round(2)}gal/min") end unless space_name.nil? space = model.getSpaceByName(space_name) space = space.get water_fixture.setSpace(space) end swh_connection.addWaterUseEquipment(water_fixture) # Connect the water use connection to the SWH loop swh_loop.addDemandBranchForComponent(swh_connection) return water_fixture end |
#model_add_swh_end_uses_by_space(model, building_type, climate_zone, swh_loop, space_type_name, space_name, space_multiplier = nil, is_flow_per_area = true) ⇒ Object
This method will add an swh water fixture to the model for the space. if the it will return a water fixture object, or NIL if there is no water load at all.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4496 def model_add_swh_end_uses_by_space(model, building_type, climate_zone, swh_loop, space_type_name, space_name, space_multiplier = nil, is_flow_per_area = true) # find the specific space_type properties from standard.json search_criteria = { 'template' => template, 'building_type' => building_type, 'space_type' => space_type_name } data = model_find_object(standards_data['space_types'], search_criteria) if data.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.Model.Model', "Could not find space type for: #{search_criteria}.") return nil end space = model.getSpaceByName(space_name) space = space.get space_area = OpenStudio.convert(space.floorArea, 'm^2', 'ft^2').get # ft2 if space_multiplier.nil? space_multiplier = 1 end # If there is no service hot water load.. Don't bother adding anything. if data['service_water_heating_peak_flow_per_area'].to_f == 0.0 && data['service_water_heating_peak_flow_rate'].to_f == 0.0 return nil end # Water use connection swh_connection = OpenStudio::Model::WaterUseConnections.new(model) # Water fixture definition water_fixture_def = OpenStudio::Model::WaterUseEquipmentDefinition.new(model) rated_flow_rate_per_area = data['service_water_heating_peak_flow_per_area'].to_f # gal/h.ft2 rated_flow_rate_gal_per_hour = if is_flow_per_area rated_flow_rate_per_area * space_area * space_multiplier # gal/h else data['service_water_heating_peak_flow_rate'].to_f end rated_flow_rate_gal_per_min = rated_flow_rate_gal_per_hour / 60 # gal/h to gal/min rated_flow_rate_m3_per_s = OpenStudio.convert(rated_flow_rate_gal_per_min, 'gal/min', 'm^3/s').get # water_use_sensible_frac_sch = OpenStudio::Model::ScheduleConstant.new(self) # water_use_sensible_frac_sch.setValue(0.2) # water_use_latent_frac_sch = OpenStudio::Model::ScheduleConstant.new(self) # water_use_latent_frac_sch.setValue(0.05) water_use_sensible_frac_sch = OpenStudio::Model::ScheduleRuleset.new(model) water_use_sensible_frac_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0.2) water_use_latent_frac_sch = OpenStudio::Model::ScheduleRuleset.new(model) water_use_latent_frac_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0.05) water_fixture_def.setSensibleFractionSchedule(water_use_sensible_frac_sch) water_fixture_def.setLatentFractionSchedule(water_use_latent_frac_sch) water_fixture_def.setPeakFlowRate(rated_flow_rate_m3_per_s) water_fixture_def.setName("#{space_name.capitalize} Service Water Use Def #{rated_flow_rate_gal_per_min.round(2)}gal/min") # Target mixed water temperature mixed_water_temp_c = data['service_water_heating_target_temperature'] mixed_water_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) mixed_water_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), mixed_water_temp_c) water_fixture_def.setTargetTemperatureSchedule(mixed_water_temp_sch) # Water use equipment water_fixture = OpenStudio::Model::WaterUseEquipment.new(water_fixture_def) schedule = model_add_schedule(model, data['service_water_heating_schedule']) water_fixture.setFlowRateFractionSchedule(schedule) water_fixture.setName("#{space_name.capitalize} Service Water Use #{rated_flow_rate_gal_per_min.round(2)}gal/min") swh_connection.addWaterUseEquipment(water_fixture) # Assign water fixture to a space water_fixture.setSpace(space) if model_attach_water_fixtures_to_spaces?(model) # Connect the water use connection to the SWH loop swh_loop.addDemandBranchForComponent(swh_connection) return water_fixture end |
#model_add_swh_loop(model, sys_name, water_heater_thermal_zone, service_water_temperature, service_water_pump_head, service_water_pump_motor_efficiency, water_heater_capacity, water_heater_volume, water_heater_fuel, parasitic_fuel_consumption_rate, building_type = nil) ⇒ OpenStudio::Model::PlantLoop
Creates a service water heating loop.
zones to place water heater in. If nil, will be assumed in 70F air for heat loss. service water pump motor efficiency, as decimal. Valid choices are Natural Gas, Electricity rate of the water heater, in W the resulting service water loop.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4018 def model_add_swh_loop(model, sys_name, water_heater_thermal_zone, service_water_temperature, service_water_pump_head, service_water_pump_motor_efficiency, water_heater_capacity, water_heater_volume, water_heater_fuel, parasitic_fuel_consumption_rate, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', 'Adding service water loop') # Service water heating loop service_water_loop = OpenStudio::Model::PlantLoop.new(model) service_water_loop.setMinimumLoopTemperature(10) service_water_loop.setMaximumLoopTemperature(60) if sys_name.nil? service_water_loop.setName('Service Water Loop') else service_water_loop.setName(sys_name) end # Temperature schedule type limits temp_sch_type_limits = OpenStudio::Model::ScheduleTypeLimits.new(model) temp_sch_type_limits.setName('Temperature Schedule Type Limits') temp_sch_type_limits.setLowerLimitValue(0.0) temp_sch_type_limits.setUpperLimitValue(100.0) temp_sch_type_limits.setNumericType('Continuous') temp_sch_type_limits.setUnitType('Temperature') # Service water heating loop controls swh_temp_c = service_water_temperature swh_temp_f = OpenStudio.convert(swh_temp_c, 'C', 'F').get swh_delta_t_r = 9 # 9F delta-T swh_delta_t_k = OpenStudio.convert(swh_delta_t_r, 'R', 'K').get swh_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) swh_temp_sch.setName("Service Water Loop Temp - #{swh_temp_f.round}F") swh_temp_sch.defaultDaySchedule.setName("Service Water Loop Temp - #{swh_temp_f.round}F Default") swh_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), swh_temp_c) swh_temp_sch.setScheduleTypeLimits(temp_sch_type_limits) swh_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, swh_temp_sch) swh_stpt_manager.setName('Service hot water setpoint manager') swh_stpt_manager.addToNode(service_water_loop.supplyOutletNode) sizing_plant = service_water_loop.sizingPlant sizing_plant.setLoopType('Heating') sizing_plant.setDesignLoopExitTemperature(swh_temp_c) sizing_plant.setLoopDesignTemperatureDifference(swh_delta_t_k) # Service water heating pump swh_pump_head_press_pa = service_water_pump_head swh_pump_motor_efficiency = service_water_pump_motor_efficiency if swh_pump_head_press_pa.nil? # As if there is no circulation pump swh_pump_head_press_pa = 0.001 swh_pump_motor_efficiency = 1 end swh_pump = case model_swh_pump_type(model, building_type) when 'ConstantSpeed' OpenStudio::Model::PumpConstantSpeed.new(model) when 'VariableSpeed' OpenStudio::Model::PumpVariableSpeed.new(model) end swh_pump.setName('Service Water Loop Pump') swh_pump.setRatedPumpHead(swh_pump_head_press_pa.to_f) swh_pump.setMotorEfficiency(swh_pump_motor_efficiency) swh_pump.setPumpControlType('Intermittent') swh_pump.addToNode(service_water_loop.supplyInletNode) water_heater = model_add_water_heater(model, water_heater_capacity, water_heater_volume, water_heater_fuel, service_water_temperature, parasitic_fuel_consumption_rate, swh_temp_sch, false, 0.0, nil, water_heater_thermal_zone, building_type) service_water_loop.addSupplyBranchForComponent(water_heater) # Service water heating loop bypass pipes water_heater_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) service_water_loop.addSupplyBranchForComponent(water_heater_bypass_pipe) coil_bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) service_water_loop.addDemandBranchForComponent(coil_bypass_pipe) supply_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) supply_outlet_pipe.addToNode(service_water_loop.supplyOutletNode) demand_inlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_inlet_pipe.addToNode(service_water_loop.demandInletNode) demand_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) demand_outlet_pipe.addToNode(service_water_loop.demandOutletNode) return service_water_loop end |
#model_add_typical_exterior_lights(model, exterior_lighting_zone_number, onsite_parking_fraction = 1.0, add_base_site_allowance = false, use_model_for_entries_and_canopies = false) ⇒ Hash
-
would be nice to add argument for some building types (SmallHotel, MidriseApartment, PrimarySchool, SecondarySchool, RetailStripmall) if it has interior or exterior circulation.
Add exterior lighting to the model
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.Model.exterior_lights.rb', line 7 def model_add_typical_exterior_lights(model, exterior_lighting_zone_number, onsite_parking_fraction = 1.0, add_base_site_allowance = false, use_model_for_entries_and_canopies = false) exterior_lights = {} installed_power = 0.0 # populate search hash search_criteria = { 'template' => template, 'exterior_lighting_zone_number' => exterior_lighting_zone_number } # load exterior_lighting_properties exterior_lighting_properties = model_find_object(standards_data['exterior_lighting'], search_criteria) # make sure lighting properties were found if exterior_lighting_properties.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.prototype.exterior_lights', "Exterior lighting properties not found for #{template}, ext lighting zone #{exterior_lighting_zone_number}, none will be added to model.") return exterior_lights end # get building types and ratio (needed to get correct schedules, parking area, entries, canopies, and drive throughs) space_type_hash = model_create_space_type_hash(model) # get model specific values to map to exterior_lighting_properties area_length_count_hash = model_create_exterior_lighting_area_length_count_hash(model, space_type_hash, use_model_for_entries_and_canopies) # using midnight to 6am setback or shutdown start_setback_shutoff = { hr: 24, min: 0 } end_setback_shutoff = { hr: 6, min: 0 } shuttoff = false setback = false if exterior_lighting_properties['building_facade_and_landscape_automatic_shut_off'] == 1 ext_lights_sch_facade_and_landscape = OpenStudio::Model::ScheduleRuleset.new(model) default_day = ext_lights_sch_facade_and_landscape.defaultDaySchedule default_day.addValue(OpenStudio::Time.new(0, end_setback_shutoff[:hr], end_setback_shutoff[:min], 0), 0.0) default_day.addValue(OpenStudio::Time.new(0, start_setback_shutoff[:hr], start_setback_shutoff[:min], 0), 1.0) OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', "Facade and Landscape exterior lights shut off from #{start_setback_shutoff} to #{end_setback_shutoff}") else ext_lights_sch_facade_and_landscape = model.alwaysOnDiscreteSchedule end if !exterior_lighting_properties['occupancy_setback_reduction'].nil? && (exterior_lighting_properties['occupancy_setback_reduction'] > 0.0) ext_lights_sch_other = OpenStudio::Model::ScheduleRuleset.new(model) setback_value = 1.0 - exterior_lighting_properties['occupancy_setback_reduction'] default_day = ext_lights_sch_other.defaultDaySchedule default_day.addValue(OpenStudio::Time.new(0, end_setback_shutoff[:hr], end_setback_shutoff[:min], 0), setback_value) default_day.addValue(OpenStudio::Time.new(0, start_setback_shutoff[:hr], start_setback_shutoff[:min], 0), 1.0) OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', "Non Facade and Landscape lights reduce by #{exterior_lighting_properties['occupancy_setback_reduction'] * 100} % from #{start_setback_shutoff} to #{end_setback_shutoff}") else ext_lights_sch_other = model.alwaysOnDiscreteSchedule end # add exterior lights for parking area if area_length_count_hash[:parking_area_and_drives_area] > 0 # lighting values multiplier = area_length_count_hash[:parking_area_and_drives_area] * onsite_parking_fraction power = exterior_lighting_properties['parking_areas_and_drives'] name_prefix = 'Parking Areas and Drives' # create ext light def OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', "Added #{power} W/ft^2 of lighting for #{multiplier} ft^2 of parking area.") ext_lights_def = OpenStudio::Model::ExteriorLightsDefinition.new(model) ext_lights_def.setName("#{name_prefix} Def (W/ft^2)") ext_lights_def.setDesignLevel(power) # create ext light inst # creating exterior lights object ext_lights = OpenStudio::Model::ExteriorLights.new(ext_lights_def, ext_lights_sch_other) ext_lights.setMultiplier(multiplier) ext_lights.setName(name_prefix) ext_lights.setControlOption(exterior_lighting_properties['control_option']) ext_lights.setEndUseSubcategory(name_prefix) exterior_lights[name_prefix] = ext_lights # update installed power installed_power += power * multiplier end # add exterior lights for facades if area_length_count_hash[:building_facades] > 0 # lighting values multiplier = area_length_count_hash[:building_facades] power = exterior_lighting_properties['building_facades'] name_prefix = 'Building Facades' # create ext light def OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', "Added #{power} W/ft^2 of lighting for #{multiplier} ft^2 of building facade area.") ext_lights_def = OpenStudio::Model::ExteriorLightsDefinition.new(model) ext_lights_def.setName("#{name_prefix} Def (W/ft^2)") ext_lights_def.setDesignLevel(power) # create ext light inst # creating exterior lights object ext_lights = OpenStudio::Model::ExteriorLights.new(ext_lights_def, ext_lights_sch_facade_and_landscape) ext_lights.setMultiplier(multiplier) ext_lights.setName(name_prefix) ext_lights.setControlOption(exterior_lighting_properties['control_option']) ext_lights.setEndUseSubcategory(name_prefix) exterior_lights[name_prefix] = ext_lights # update installed power installed_power += power * multiplier end # add exterior lights for main entries if area_length_count_hash[:main_entries] > 0 # lighting values multiplier = area_length_count_hash[:main_entries] power = exterior_lighting_properties['main_entries'] name_prefix = 'Main Entries' # create ext light def OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', "Added #{power} W/ft of lighting for #{multiplier} ft of main entry length.") ext_lights_def = OpenStudio::Model::ExteriorLightsDefinition.new(model) ext_lights_def.setName("#{name_prefix} Def (W/ft)") ext_lights_def.setDesignLevel(power) # create ext light inst # creating exterior lights object ext_lights = OpenStudio::Model::ExteriorLights.new(ext_lights_def, ext_lights_sch_other) ext_lights.setMultiplier(multiplier) ext_lights.setName(name_prefix) ext_lights.setControlOption(exterior_lighting_properties['control_option']) ext_lights.setEndUseSubcategory(name_prefix) exterior_lights[name_prefix] = ext_lights # update installed power installed_power += power * multiplier end # add exterior lights for other doors if area_length_count_hash[:other_doors] > 0 # lighting values multiplier = area_length_count_hash[:other_doors] power = exterior_lighting_properties['other_doors'] name_prefix = 'Other Doors' # create ext light def OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', "Added #{power} W/ft of lighting for #{multiplier} ft of other doors.") ext_lights_def = OpenStudio::Model::ExteriorLightsDefinition.new(model) ext_lights_def.setName("#{name_prefix} Def (W/ft)") ext_lights_def.setDesignLevel(power) # create ext light inst # creating exterior lights object ext_lights = OpenStudio::Model::ExteriorLights.new(ext_lights_def, ext_lights_sch_other) ext_lights.setMultiplier(multiplier) ext_lights.setName(name_prefix) ext_lights.setControlOption(exterior_lighting_properties['control_option']) ext_lights.setEndUseSubcategory(name_prefix) exterior_lights[name_prefix] = ext_lights # update installed power installed_power += power * multiplier end # add exterior lights for entry canopies if area_length_count_hash[:canopy_entry_area] > 0 # lighting values multiplier = area_length_count_hash[:canopy_entry_area] power = exterior_lighting_properties['entry_canopies'] name_prefix = 'Entry Canopies' # create ext light def OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', "Added #{power} W/ft^2 of lighting for #{multiplier} ft^2 of building entry canopies.") ext_lights_def = OpenStudio::Model::ExteriorLightsDefinition.new(model) ext_lights_def.setName("#{name_prefix} Def (W/ft^2)") ext_lights_def.setDesignLevel(power) # create ext light inst # creating exterior lights object ext_lights = OpenStudio::Model::ExteriorLights.new(ext_lights_def, ext_lights_sch_other) ext_lights.setMultiplier(multiplier) ext_lights.setName(name_prefix) ext_lights.setControlOption(exterior_lighting_properties['control_option']) ext_lights.setEndUseSubcategory(name_prefix) exterior_lights[name_prefix] = ext_lights # update installed power installed_power += power * multiplier end # add exterior lights for emergency canopies if area_length_count_hash[:canopy_emergency_area] > 0 # lighting values multiplier = area_length_count_hash[:canopy_emergency_area] power = exterior_lighting_properties['loading_areas_for_emergency_vehicles'] name_prefix = 'Emergency Canopies' # create ext light def OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', "Added #{power} W/ft^2 of lighting for #{multiplier} ft^2 of building emergency canopies.") ext_lights_def = OpenStudio::Model::ExteriorLightsDefinition.new(model) ext_lights_def.setName("#{name_prefix} Def (W/ft^2)") ext_lights_def.setDesignLevel(power) # create ext light inst # creating exterior lights object ext_lights = OpenStudio::Model::ExteriorLights.new(ext_lights_def, ext_lights_sch_other) ext_lights.setMultiplier(multiplier) ext_lights.setName(name_prefix) ext_lights.setControlOption(exterior_lighting_properties['control_option']) ext_lights.setEndUseSubcategory(name_prefix) exterior_lights[name_prefix] = ext_lights # update installed power installed_power += power * multiplier end # add exterior lights for drive through windows if area_length_count_hash[:drive_through_windows] > 0 # lighting values multiplier = area_length_count_hash[:drive_through_windows] power = exterior_lighting_properties['drive_through_windows_and_doors'] name_prefix = 'Drive Through Windows' # create ext light def OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', "Added #{power} W/drive through window of lighting for #{multiplier} drie through windows.") ext_lights_def = OpenStudio::Model::ExteriorLightsDefinition.new(model) ext_lights_def.setName("#{name_prefix} Def (W/ft^2)") ext_lights_def.setDesignLevel(power) # create ext light inst # creating exterior lights object ext_lights = OpenStudio::Model::ExteriorLights.new(ext_lights_def, ext_lights_sch_other) ext_lights.setMultiplier(multiplier) ext_lights.setName(name_prefix) ext_lights.setControlOption(exterior_lighting_properties['control_option']) ext_lights.setEndUseSubcategory(name_prefix) exterior_lights[name_prefix] = ext_lights # update installed power installed_power += power * multiplier end # TODO: - add_base_site_lighting_allowance (non landscaping tradable lighting) # add exterior lights for drive through windows if add_base_site_allowance # lighting values if !exterior_lighting_properties['base_site_allowance_power'].nil? power = exterior_lighting_properties['base_site_allowance_power'] elsif !exterior_lighting_properties['base_site_allowance_fraction'].nil? power = exterior_lighting_properties['base_site_allowance_fraction'] * installed_power # shold be of allowed vs. installed, but hard to calculate else OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', 'Cannot determine target base site allowance power, will set to 0 W.') power = 0.0 end name_prefix = 'Base Site Allowance' # create ext light def OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', "Added #{power} W of non landscape tradable exterior lighting. Wil follow occupancy setback reduction.") ext_lights_def = OpenStudio::Model::ExteriorLightsDefinition.new(model) ext_lights_def.setName("#{name_prefix} Def (W)") ext_lights_def.setDesignLevel(power) # create ext light inst # creating exterior lights object ext_lights = OpenStudio::Model::ExteriorLights.new(ext_lights_def, ext_lights_sch_other) ext_lights.setName(name_prefix) ext_lights.setControlOption(exterior_lighting_properties['control_option']) ext_lights.setEndUseSubcategory(name_prefix) exterior_lights[name_prefix] = ext_lights # don't need to update installed power for this end return exterior_lights end |
#model_add_typical_swh(model, trust_effective_num_spaces = false, fuel = nil, pipe_insul_in = nil, circulating = nil) ⇒ Array
-
add in losses from tank and pipe insulation, etc.
add typical swh demand and supply to model
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.Model.swh.rb', line 229 def model_add_typical_swh(model, trust_effective_num_spaces = false, fuel = nil, pipe_insul_in = nil, circulating = nil) # array of hot water loops swh_systems = [] # hash of general water use equipment awaiting loop water_use_equipment_hash = {} # key is standards building type value is array of water use equipment # create space type hash (need num_units for MidriseApartment and RetailStripmall) space_type_hash = model_create_space_type_hash(model, trust_effective_num_spaces = false) # add temperate schedules to hash so they can be shared across water use equipment water_use_def_schedules = {} # key is temp C value is schedule # loop through space types adding demand side of swh model.getSpaceTypes.sort.each do |space_type| next unless space_type.standardsBuildingType.is_initialized next unless space_type.standardsSpaceType.is_initialized next unless space_type_hash.key?(space_type) # this is used for space types without any floor area stds_bldg_type = space_type.standardsBuildingType.get stds_space_type = space_type.standardsSpaceType.get # lookup space_type_properties space_type_properties = space_type_get_standards_data(space_type) gal_hr_per_area = space_type_properties['service_water_heating_peak_flow_per_area'] gal_hr_peak_flow_rate = space_type_properties['service_water_heating_peak_flow_rate'] flow_rate_fraction_schedule = model_add_schedule(model, space_type_properties['service_water_heating_schedule']) service_water_temperature_si = space_type_properties['service_water_heating_target_temperature'] service_water_fraction_sensible = space_type_properties['service_water_heating_fraction_sensible'] service_water_fraction_latent = space_type_properties['service_water_heating_fraction_latent'] floor_area_si = space_type_hash[space_type][:floor_area] floor_area_ip = OpenStudio.convert(floor_area_si, 'm^2', 'ft^2').get # next if no service water heating demand next unless gal_hr_per_area.to_f > 0.0 || gal_hr_peak_flow_rate.to_f > 0.0 # If there is no SWH schedule specified, assume # that there should be no SWH consumption for this space type. unless flow_rate_fraction_schedule OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', "No service water heating schedule was specified for #{space_type.name}, an always off schedule will be used and no water will be used.") flow_rate_fraction_schedule = model.alwaysOffDiscreteSchedule end if (stds_bldg_type == 'MidriseApartment' && stds_space_type.include?('Apartment')) || stds_bldg_type == 'StripMall' num_units = space_type_hash[space_type][:num_units].round OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Adding dedicated water heating fpr #{num_units} #{space_type.name} units, each with max flow rate of #{gal_hr_peak_flow_rate} gal/hr per.") # add water use equipment definition water_use_equip_def = OpenStudio::Model::WaterUseEquipmentDefinition.new(model) water_use_equip_def.setName("#{space_type.name} SWH def") peak_flow_rate_si = OpenStudio.convert(gal_hr_peak_flow_rate, 'gal/hr', 'm^3/s').get water_use_equip_def.setPeakFlowRate(peak_flow_rate_si) target_temp = service_water_temperature_si # in spreadsheet in si, no conversion needed unless that changes name = "#{target_temp} C" if water_use_def_schedules.key?(name) target_temperature_sch = water_use_def_schedules[name] else target_temperature_sch = model_add_constant_schedule_ruleset(model, target_temp, name) water_use_def_schedules[name] = target_temperature_sch end water_use_equip_def.setTargetTemperatureSchedule(target_temperature_sch) name = "#{service_water_fraction_sensible} Fraction" if water_use_def_schedules.key?(name) service_water_fraction_sensible_sch = water_use_def_schedules[name] else service_water_fraction_sensible_sch = model_add_constant_schedule_ruleset(model, service_water_fraction_sensible, name) water_use_def_schedules[name] = service_water_fraction_sensible_sch end water_use_equip_def.setSensibleFractionSchedule(service_water_fraction_sensible_sch) name = "#{service_water_fraction_latent} Fraction" if water_use_def_schedules.key?(name) service_water_fraction_latent_sch = water_use_def_schedules[name] else service_water_fraction_latent_sch = model_add_constant_schedule_ruleset(model, service_water_fraction_sensible, name) water_use_def_schedules[name] = service_water_fraction_latent_sch end water_use_equip_def.setLatentFractionSchedule(service_water_fraction_latent_sch) # add water use equipment, connection, and loop for each unit num_units.times do |i| # add water use equipment water_use_equip = OpenStudio::Model::WaterUseEquipment.new(water_use_equip_def) water_use_equip.setFlowRateFractionSchedule(flow_rate_fraction_schedule) water_use_equip.setName("#{space_type.name} SWH #{i + 1}") # add water use connection water_use_connection = OpenStudio::Model::WaterUseConnections.new(model) water_use_connection.addWaterUseEquipment(water_use_equip) water_use_connection.setName("#{space_type.name} WUC #{i + 1}") # gather inputs for add_swh_loop # default fuel, capacity, and volume from Table A.1. Water Heating Equipment Enhancements to ASHRAE Standard 90.1 Prototype Building Models # temperature, pump head, motor efficiency, and parasitic load from Prototype Inputs sys_name = "#{space_type.name} Service Water Loop #{i + 1}" water_heater_thermal_zone = nil service_water_temperature = service_water_temperature_si service_water_pump_head = 0.01 service_water_pump_motor_efficiency = 1.0 water_heater_fuel = if fuel.nil? 'Electric' else fuel end if stds_bldg_type == 'MidriseApartment' water_heater_capacity = OpenStudio.convert(15.0, 'kBtu/hr', 'W').get water_heater_volume = OpenStudio.convert(50.0, 'gal', 'm^3').get parasitic_fuel_consumption_rate = 0.0 # Prototype inputs has 87.75W but prototype IDF's use 0 else # StripMall water_heater_capacity = OpenStudio.convert(12.0, 'kBtu/hr', 'W').get water_heater_volume = OpenStudio.convert(40.0, 'gal', 'm^3').get parasitic_fuel_consumption_rate = 173.0 end # make loop for each unit and add on water use equipment unit_hot_water_loop = model_add_swh_loop(model, sys_name, water_heater_thermal_zone, service_water_temperature, service_water_pump_head, service_water_pump_motor_efficiency, water_heater_capacity, water_heater_volume, water_heater_fuel, parasitic_fuel_consumption_rate, stds_bldg_type) # Connect the water use connection to the SWH loop unit_hot_water_loop.addDemandBranchForComponent(water_use_connection) # apply efficiency to hot water heater unit_hot_water_loop.supplyComponents.sort.each do |component| next if component.to_WaterHeaterMixed.empty? component = component.to_WaterHeaterMixed.get water_heater_mixed_apply_efficiency(component) end # add to list of systems swh_systems << unit_hot_water_loop end elsif stds_space_type.include?('Kitchen') || stds_space_type.include?('Laundry') gal_hr_peak_flow_rate = gal_hr_per_area * floor_area_ip OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Adding dedicated water heating for #{space_type.name} space type with max flow rate of #{gal_hr_peak_flow_rate.round} gal/hr.") # add water use equipment definition water_use_equip_def = OpenStudio::Model::WaterUseEquipmentDefinition.new(model) water_use_equip_def.setName("#{space_type.name} SWH def") peak_flow_rate_si = OpenStudio.convert(gal_hr_peak_flow_rate, 'gal/hr', 'm^3/s').get water_use_equip_def.setPeakFlowRate(peak_flow_rate_si) target_temp = service_water_temperature_si # in spreadsheet in si, no conversion needed unless that changes name = "#{target_temp} C" if water_use_def_schedules.key?(name) target_temperature_sch = water_use_def_schedules[name] else target_temperature_sch = model_add_constant_schedule_ruleset(model, target_temp, name) water_use_def_schedules[name] = target_temperature_sch end water_use_equip_def.setTargetTemperatureSchedule(target_temperature_sch) name = "#{service_water_fraction_sensible} Fraction" if water_use_def_schedules.key?(name) service_water_fraction_sensible_sch = water_use_def_schedules[name] else service_water_fraction_sensible_sch = model_add_constant_schedule_ruleset(model, service_water_fraction_sensible, name) water_use_def_schedules[name] = service_water_fraction_sensible_sch end water_use_equip_def.setSensibleFractionSchedule(service_water_fraction_sensible_sch) name = "#{service_water_fraction_latent} Fraction" if water_use_def_schedules.key?(name) service_water_fraction_latent_sch = water_use_def_schedules[name] else service_water_fraction_latent_sch = model_add_constant_schedule_ruleset(model, service_water_fraction_sensible, name) water_use_def_schedules[name] = service_water_fraction_latent_sch end water_use_equip_def.setLatentFractionSchedule(service_water_fraction_latent_sch) # add water use equipment water_use_equip = OpenStudio::Model::WaterUseEquipment.new(water_use_equip_def) water_use_equip.setFlowRateFractionSchedule(flow_rate_fraction_schedule) water_use_equip.setName("#{space_type.name} SWH") # add water use connection water_use_connection = OpenStudio::Model::WaterUseConnections.new(model) water_use_connection.addWaterUseEquipment(water_use_equip) water_use_connection.setName("#{space_type.name} WUC") # gather inputs for add_swh_loop sys_name = "#{space_type.name} Service Water Loop" water_heater_thermal_zone = nil water_heater_temp_si = 60.0 # C service_water_pump_head = 0.01 service_water_pump_motor_efficiency = 1.0 water_heater_fuel = if fuel.nil? 'Gas' else fuel end # find_water_heater_capacity_volume_and_parasitic water_use_equipment_array = [water_use_equip] water_heater_sizing = model_find_water_heater_capacity_volume_and_parasitic(model, water_use_equipment_array) water_heater_capacity = water_heater_sizing[:water_heater_capacity] water_heater_volume = water_heater_sizing[:water_heater_volume] parasitic_fuel_consumption_rate = water_heater_sizing[:parasitic_fuel_consumption_rate] # make loop for each unit and add on water use equipment dedicated_hot_water_loop = model_add_swh_loop(model, sys_name, water_heater_thermal_zone, water_heater_temp_si, service_water_pump_head, service_water_pump_motor_efficiency, water_heater_capacity, water_heater_volume, water_heater_fuel, parasitic_fuel_consumption_rate, stds_bldg_type) # Connect the water use connection to the SWH loop dedicated_hot_water_loop.addDemandBranchForComponent(water_use_connection) # find water heater dedicated_hot_water_loop.supplyComponents.sort.each do |component| next if component.to_WaterHeaterMixed.empty? water_heater = component.to_WaterHeaterMixed.get # apply efficiency to hot water heater water_heater_mixed_apply_efficiency(water_heater) end # add to list of systems swh_systems << dedicated_hot_water_loop # add booster to all kitchens except for QuickServiceRestaurant (QuickServiceRestaurant assumed to use chemicals instead of hotter water) # boosters are all 6 gal elec but heating capacity varies from 3 to 19 (kBtu/hr) for prototype buildings if stds_space_type.include?('Kitchen') && stds_bldg_type != 'QuickServiceRestaurant' # find_water_heater_capacity_volume_and_parasitic water_use_equipment_array = [water_use_equip] inlet_temp_ip = OpenStudio.convert(service_water_temperature_si, 'C', 'F').get # pre-booster temp outlet_temp_ip = inlet_temp_ip + 40.0 peak_flow_fraction = 0.6 # assume 60% of peak for dish washing water_heater_sizing = model_find_water_heater_capacity_volume_and_parasitic(model, water_use_equipment_array, pipe_hash = {}, 1.0, 1.0, inlet_temp_ip, outlet_temp_ip, peak_flow_fraction) water_heater_capacity = water_heater_sizing[:water_heater_capacity] # gather additional inputs for add_swh_booster water_heater_volume = OpenStudio.convert(6, 'gal', 'm^3').get water_heater_fuel = 'Electric' booster_water_temperature = 82.22 # C parasitic_fuel_consumption_rate = 0.0 booster_water_heater_thermal_zone = nil # add_swh_booster booster_service_water_loop = model_add_swh_booster(model, dedicated_hot_water_loop, water_heater_capacity, water_heater_volume, water_heater_fuel, booster_water_temperature, parasitic_fuel_consumption_rate, booster_water_heater_thermal_zone, stds_bldg_type) # find water heater booster_service_water_loop.supplyComponents.sort.each do |component| next if component.to_WaterHeaterMixed.empty? water_heater = component.to_WaterHeaterMixed.get # apply efficiency to hot water heater water_heater_mixed_apply_efficiency(water_heater) end # rename booster loop booster_service_water_loop.setName("#{space_type.name} Booster Service Water Loop") OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Adding Electric Booster water heater for #{space_type.name} on a loop named #{booster_service_water_loop.name}.") end else # store water use equip by building type in hash so can add general building type hot water loop gal_hr_peak_flow_rate = gal_hr_per_area * floor_area_ip OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Adding water heating for #{space_type.name} space type with max flow rate of #{gal_hr_peak_flow_rate.round} gal/hr on a shared loop.") # add water use equipment definition water_use_equip_def = OpenStudio::Model::WaterUseEquipmentDefinition.new(model) water_use_equip_def.setName("#{space_type.name} SWH def") peak_flow_rate_si = OpenStudio.convert(gal_hr_peak_flow_rate, 'gal/hr', 'm^3/s').get water_use_equip_def.setPeakFlowRate(peak_flow_rate_si) target_temp = service_water_temperature_si # in spreadsheet in si, no conversion needed unless that changes name = "#{target_temp} C" if water_use_def_schedules.key?(name) target_temperature_sch = water_use_def_schedules[name] else target_temperature_sch = model_add_constant_schedule_ruleset(model, target_temp, name) water_use_def_schedules[name] = target_temperature_sch end water_use_equip_def.setTargetTemperatureSchedule(target_temperature_sch) name = "#{service_water_fraction_sensible} Fraction" if water_use_def_schedules.key?(name) service_water_fraction_sensible_sch = water_use_def_schedules[name] else service_water_fraction_sensible_sch = model_add_constant_schedule_ruleset(model, service_water_fraction_sensible, name) water_use_def_schedules[name] = service_water_fraction_sensible_sch end water_use_equip_def.setSensibleFractionSchedule(service_water_fraction_sensible_sch) name = "#{service_water_fraction_latent} Fraction" if water_use_def_schedules.key?(name) service_water_fraction_latent_sch = water_use_def_schedules[name] else service_water_fraction_latent_sch = model_add_constant_schedule_ruleset(model, service_water_fraction_sensible, name) water_use_def_schedules[name] = service_water_fraction_latent_sch end water_use_equip_def.setLatentFractionSchedule(service_water_fraction_latent_sch) # add water use equipment water_use_equip = OpenStudio::Model::WaterUseEquipment.new(water_use_equip_def) water_use_equip.setFlowRateFractionSchedule(flow_rate_fraction_schedule) water_use_equip.setName("#{space_type.name} SWH") if water_use_equipment_hash.key?(stds_bldg_type) water_use_equipment_hash[stds_bldg_type] << water_use_equip else water_use_equipment_hash[stds_bldg_type] = [water_use_equip] end end end # get building floor area and effective number of stories bldg_floor_area = model.getBuilding.floorArea bldg_effective_num_stories_hash = model_effective_num_stories(model) bldg_effective_num_stories = bldg_effective_num_stories_hash[:below_grade] + bldg_effective_num_stories_hash[:above_grade] # add non-dedicated system(s) here. Separate systems for water use equipment from different building types water_use_equipment_hash.sort.each do |stds_bldg_type, water_use_equipment_array| # gather inputs for add_swh_loop sys_name = "#{stds_bldg_type} Shared Service Water Loop" water_heater_thermal_zone = nil water_heater_temp_si = 60.0 # find pump values # Table A.2 in PrototypeModelEnhancements_2014_0.pdf shows 10ft on everything except SecondarySchool which has 11.4ft # todo - if SmallOffice then shouldn't have circulating pump if ['Office', 'PrimarySchool', 'Outpatient', 'Hospital', 'SmallHotel', 'LargeHotel', 'FullServiceRestaurant', 'HighriseApartment'].include?(stds_bldg_type) service_water_pump_head = OpenStudio.convert(10.0, 'ftH_{2}O', 'Pa').get service_water_pump_motor_efficiency = 0.3 if circulating.nil? then irculating = true end if pipe_insul_in.nil? then pipe_insul_in = 0.5 end elsif ['SecondarySchool'].include?(stds_bldg_type) service_water_pump_head = OpenStudio.convert(11.4, 'ftH_{2}O', 'Pa').get service_water_pump_motor_efficiency = 0.3 if circulating.nil? then irculating = true end if pipe_insul_in.nil? then pipe_insul_in = 0.5 end else # values for non-circulating pump service_water_pump_head = 0.01 service_water_pump_motor_efficiency = 1.0 if circulating.nil? then irculating = false end if pipe_insul_in.nil? then pipe_insul_in = 0.0 end end # TODO: - add building type or sice specific logic or just assume Gas? (SmallOffice and Warehouse are only non unit prototypes with Electric heating) water_heater_fuel = if fuel.nil? 'Gas' else fuel end bldg_type_floor_area = 0.0 space_type_hash.sort.each do |space_type, hash| next if hash[:stds_bldg_type] != stds_bldg_type bldg_type_floor_area += hash[:floor_area] end # inputs for find_water_heater_capacity_volume_and_parasitic pipe_hash = {} pipe_hash[:floor_area] = bldg_type_floor_area pipe_hash[:effective_num_stories] = bldg_effective_num_stories * (bldg_type_floor_area / bldg_floor_area) pipe_hash[:circulating] = circulating pipe_hash[:insulation_thickness] = pipe_insul_in # find_water_heater_capacity_volume_and_parasitic water_heater_sizing = model_find_water_heater_capacity_volume_and_parasitic(model, water_use_equipment_array, pipe_hash) water_heater_capacity = water_heater_sizing[:water_heater_capacity] water_heater_volume = water_heater_sizing[:water_heater_volume] parasitic_fuel_consumption_rate = water_heater_sizing[:parasitic_fuel_consumption_rate] if parasitic_fuel_consumption_rate > 0 OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Adding parasitic loss for #{stds_bldg_type} loop of #{parasitic_fuel_consumption_rate.round} Btu/hr.") end # make loop for each unit and add on water use equipment shared_hot_water_loop = model_add_swh_loop(model, sys_name, water_heater_thermal_zone, water_heater_temp_si, service_water_pump_head, service_water_pump_motor_efficiency, water_heater_capacity, water_heater_volume, water_heater_fuel, parasitic_fuel_consumption_rate, stds_bldg_type) # find water heater shared_hot_water_loop.supplyComponents.sort.each do |component| next if component.to_WaterHeaterMixed.empty? water_heater = component.to_WaterHeaterMixed.get # apply efficiency to hot water heater water_heater_mixed_apply_efficiency(water_heater) end # loop through water use equipment water_use_equipment_array.sort.each do |water_use_equip| # add water use connection water_use_connection = OpenStudio::Model::WaterUseConnections.new(model) water_use_connection.addWaterUseEquipment(water_use_equip) water_use_connection.setName(water_use_equip.name.get.gsub('SWH', 'WUC')) # Connect the water use connection to the SWH loop shared_hot_water_loop.addDemandBranchForComponent(water_use_connection) end # add to list of systems swh_systems << shared_hot_water_loop OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Adding shared water heating loop for #{stds_bldg_type}.") end return swh_systems end |
#model_add_unitheater(model, sys_name, thermal_zones, hvac_op_sch, fan_control_type, fan_pressure_rise, heating_type, hot_water_loop = nil, building_type = nil) ⇒ Array<OpenStudio::Model::ZoneHVACUnitHeater>
Creates a unit heater for each zone and adds it to the model.
or nil in which case will be defaulted to always on NaturalGas, Electricity, DistrictHeating array of the resulting unit heaters.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 3712 def model_add_unitheater(model, sys_name, thermal_zones, hvac_op_sch, fan_control_type, fan_pressure_rise, heating_type, hot_water_loop = nil, building_type = nil) # Control temps for HW loop # will only be used when hot_water_loop is provided. hw_temp_f = 180 # HW setpoint 180F hw_delta_t_r = 20 # 20F delta-T htg_sa_temp_f = 100 # 100F air from unit heaters zn_temp_f = 60 # 60F entering unit heater from zone hw_temp_c = OpenStudio.convert(hw_temp_f, 'F', 'C').get hw_delta_t_k = OpenStudio.convert(hw_delta_t_r, 'R', 'K').get htg_sa_temp_c = OpenStudio.convert(htg_sa_temp_f, 'F', 'C').get zn_temp_c = OpenStudio.convert(zn_temp_f, 'F', 'C').get thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding split unit heater for #{zone.name}.") end # hvac operation schedule hvac_op_sch = if hvac_op_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, hvac_op_sch) end # Make a unit heater for each zone unit_heaters = [] thermal_zones.each do |zone| # Zone sizing sizing_zone = zone.sizingZone sizing_zone.setZoneCoolingDesignSupplyAirTemperature(14) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(50.0) sizing_zone.setZoneCoolingDesignSupplyAirHumidityRatio(0.008) sizing_zone.setZoneHeatingDesignSupplyAirHumidityRatio(0.008) # add fan fan = OpenStudio::Model::FanConstantVolume.new(model, hvac_op_sch) fan.setName("#{zone.name} UnitHeater Fan") fan.setPressureRise(fan_pressure_rise) fan.setFanEfficiency(0.53625) fan.setMotorEfficiency(0.825) # add heating coil htg_coil = nil if heating_type == 'NaturalGas' || heating_type == 'Gas' htg_coil = OpenStudio::Model::CoilHeatingGas.new(model, hvac_op_sch) htg_coil.setName("#{zone.name} UnitHeater Gas Htg Coil") elsif heating_type == 'Electricity' || heating_type == 'Electric' htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, hvac_op_sch) htg_coil.setName("#{zone.name} UnitHeater Electric Htg Coil") elsif heating_type == 'DistrictHeating' && !hot_water_loop.nil? htg_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{zone.name} UnitHeater Water Htg Coil") htg_coil.setRatedInletWaterTemperature(hw_temp_c) htg_coil.setRatedInletAirTemperature(zn_temp_c) htg_coil.setRatedOutletWaterTemperature(hw_temp_c - hw_delta_t_k) htg_coil.setRatedOutletAirTemperature(htg_sa_temp_c) hot_water_loop.addDemandBranchForComponent(htg_coil) else OpenStudio.logFree(OpenStudio::Error, 'openstudio.Model.Model', 'No heating type was found when adding unit heater; no unit heater will be created.') return false end unit_heater = OpenStudio::Model::ZoneHVACUnitHeater.new(model, hvac_op_sch, fan, htg_coil) unit_heater.setName("#{zone.name} UnitHeater") unit_heater.setFanControlType(fan_control_type) unit_heater.addToThermalZone(zone) unit_heaters << unit_heater end return unit_heaters end |
#model_add_vav_pfp_boxes(model, sys_name, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, vav_fan_efficiency, vav_fan_motor_efficiency, vav_fan_pressure_rise, building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 969 def model_add_vav_pfp_boxes(model, sys_name, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, vav_fan_efficiency, vav_fan_motor_efficiency, vav_fan_pressure_rise, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding VAV with PFP Boxes and Reheat system for #{thermal_zones.size} zones.") thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Model.Model', "---#{zone.name}") end # hvac operation schedule hvac_op_sch = if hvac_op_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, hvac_op_sch) end # oa damper schedule oa_damper_sch = if oa_damper_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, oa_damper_sch) end # control temps used across all air handlers clg_sa_temp_f = 55.04 # Central deck clg temp 55F prehtg_sa_temp_f = 44.6 # Preheat to 44.6F preclg_sa_temp_f = 55.04 # Precool to 55F htg_sa_temp_f = 55.04 # Central deck htg temp 55F rht_sa_temp_f = 104 # VAV box reheat to 104F zone_htg_sa_temp_f = 104 # Zone heating design supply air temperature to 104 F clg_sa_temp_c = OpenStudio.convert(clg_sa_temp_f, 'F', 'C').get prehtg_sa_temp_c = OpenStudio.convert(prehtg_sa_temp_f, 'F', 'C').get preclg_sa_temp_c = OpenStudio.convert(preclg_sa_temp_f, 'F', 'C').get htg_sa_temp_c = OpenStudio.convert(htg_sa_temp_f, 'F', 'C').get rht_sa_temp_c = OpenStudio.convert(rht_sa_temp_f, 'F', 'C').get zone_htg_sa_temp_c = OpenStudio.convert(zone_htg_sa_temp_f, 'F', 'C').get sa_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) sa_temp_sch.setName("Supply Air Temp - #{clg_sa_temp_f}F") sa_temp_sch.defaultDaySchedule.setName("Supply Air Temp - #{clg_sa_temp_f}F Default") sa_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), clg_sa_temp_c) # air handler air_loop = OpenStudio::Model::AirLoopHVAC.new(model) if sys_name.nil? air_loop.setName("#{thermal_zones.size} Zone VAV with PFP Boxes and Reheat") else air_loop.setName(sys_name) end air_loop.setAvailabilitySchedule(hvac_op_sch) sa_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, sa_temp_sch) sa_stpt_manager.setName("#{thermal_zones.size} Zone VAV supply air setpoint manager") sa_stpt_manager.addToNode(air_loop.supplyOutletNode) # air handler controls sizing_system = air_loop.sizingSystem sizing_system.setPreheatDesignTemperature(prehtg_sa_temp_c) sizing_system.setPrecoolDesignTemperature(preclg_sa_temp_c) sizing_system.setCentralCoolingDesignSupplyAirTemperature(clg_sa_temp_c) sizing_system.setCentralHeatingDesignSupplyAirTemperature(htg_sa_temp_c) sizing_system.setSizingOption('Coincident') sizing_system.setAllOutdoorAirinCooling(false) sizing_system.setAllOutdoorAirinHeating(false) sizing_system.setSystemOutdoorAirMethod('ZoneSum') # fan fan = OpenStudio::Model::FanVariableVolume.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{air_loop.name} Fan") fan.setFanEfficiency(vav_fan_efficiency) fan.setMotorEfficiency(vav_fan_motor_efficiency) fan.setPressureRise(vav_fan_pressure_rise) fan.setFanPowerMinimumFlowRateInputMethod('fraction') fan.setFanPowerMinimumFlowFraction(0.25) fan.addToNode(air_loop.supplyInletNode) fan.setEndUseSubcategory('VAV system Fans') # heating coil htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{air_loop.name} Htg Coil") htg_coil.addToNode(air_loop.supplyInletNode) # cooling coil clg_coil = OpenStudio::Model::CoilCoolingWater.new(model, model.alwaysOnDiscreteSchedule) clg_coil.setName("#{air_loop.name} Clg Coil") clg_coil.addToNode(air_loop.supplyInletNode) clg_coil.setHeatExchangerConfiguration('CrossFlow') chilled_water_loop.addDemandBranchForComponent(clg_coil) clg_coil.controllerWaterCoil.get.setName("#{air_loop.name} Clg Coil Controller") # outdoor air intake system oa_intake_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_intake_controller.setName("#{air_loop.name} OA Controller") oa_intake_controller.setMinimumLimitType('FixedMinimum') oa_intake_controller.autosizeMinimumOutdoorAirFlowRate # oa_intake_controller.setMinimumOutdoorAirSchedule(oa_damper_sch) controller_mv = oa_intake_controller.controllerMechanicalVentilation controller_mv.setName("#{air_loop.name} Vent Controller") controller_mv.setSystemOutdoorAirMethod('VentilationRateProcedure') oa_intake = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_intake_controller) oa_intake.setName("#{air_loop.name} OA Sys") oa_intake.addToNode(air_loop.supplyInletNode) # The oa system need to be added before setting the night cycle control air_loop.setNightCycleControlType('CycleOnAny') # hook the VAV system to each zone thermal_zones.each do |zone| # reheat coil rht_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) rht_coil.setName("#{zone.name} Rht Coil") # terminal fan pfp_fan = OpenStudio::Model::FanConstantVolume.new(model, model.alwaysOnDiscreteSchedule) pfp_fan.setName("#{zone.name} PFP Term Fan") pfp_fan.setPressureRise(300) # parallel fan powered terminal pfp_terminal = OpenStudio::Model::AirTerminalSingleDuctParallelPIUReheat.new(model, model.alwaysOnDiscreteSchedule, pfp_fan, rht_coil) pfp_terminal.setName("#{zone.name} PFP Term") air_loop.addBranchForZone(zone, pfp_terminal.to_StraightComponent) # Zone sizing # TODO Create general logic for cooling airflow method. # Large hotel uses design day with limit, school uses design day. sizing_zone = zone.sizingZone sizing_zone.setCoolingDesignAirFlowMethod('DesignDay') sizing_zone.setHeatingDesignAirFlowMethod('DesignDay') sizing_zone.setZoneCoolingDesignSupplyAirTemperature(clg_sa_temp_c) # sizing_zone.setZoneHeatingDesignSupplyAirTemperature(rht_sa_temp_c) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(zone_htg_sa_temp_c) end return air_loop end |
#model_add_vav_reheat(model, sys_name, hot_water_loop, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, vav_fan_efficiency, vav_fan_motor_efficiency, vav_fan_pressure_rise, return_plenum, reheat_type = 'Water', building_type = nil) ⇒ OpenStudio::Model::AirLoopHVAC
or nil in which case will be defaulted to always on or nil in which case will be defaulted to always open the supply plenum, or nil, in which case no return plenum will be used.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 726 def model_add_vav_reheat(model, sys_name, hot_water_loop, chilled_water_loop, thermal_zones, hvac_op_sch, oa_damper_sch, vav_fan_efficiency, vav_fan_motor_efficiency, vav_fan_pressure_rise, return_plenum, reheat_type = 'Water', building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding VAV system for #{thermal_zones.size} zones.") thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Model.Model', "---#{zone.name}") end hw_temp_f = 180 # HW setpoint 180F hw_delta_t_r = 20 # 20F delta-T hw_temp_c = OpenStudio.convert(hw_temp_f, 'F', 'C').get hw_delta_t_k = OpenStudio.convert(hw_delta_t_r, 'R', 'K').get # hvac operation schedule hvac_op_sch = if hvac_op_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, hvac_op_sch) end # oa damper schedule oa_damper_sch = if oa_damper_sch.nil? model.alwaysOnDiscreteSchedule else model_add_schedule(model, oa_damper_sch) end # control temps used across all air handlers clg_sa_temp_f = 55.04 # Central deck clg temp 55F prehtg_sa_temp_f = 44.6 # Preheat to 44.6F preclg_sa_temp_f = 55.04 # Precool to 55F htg_sa_temp_f = 55.04 # Central deck htg temp 55F if building_type == 'LargeHotel' htg_sa_temp_f = 62 # Central deck htg temp 55F end zone_htg_sa_temp_f = 104 # Zone heating design supply air temperature to 104 F rht_sa_temp_f = if building_type == 'LargeHotel' 90 # VAV box reheat to 90F for large hotel else 104 # VAV box reheat to 104F end clg_sa_temp_c = OpenStudio.convert(clg_sa_temp_f, 'F', 'C').get prehtg_sa_temp_c = OpenStudio.convert(prehtg_sa_temp_f, 'F', 'C').get preclg_sa_temp_c = OpenStudio.convert(preclg_sa_temp_f, 'F', 'C').get htg_sa_temp_c = OpenStudio.convert(htg_sa_temp_f, 'F', 'C').get rht_sa_temp_c = OpenStudio.convert(rht_sa_temp_f, 'F', 'C').get zone_htg_sa_temp_c = OpenStudio.convert(zone_htg_sa_temp_f, 'F', 'C').get sa_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) sa_temp_sch.setName("Supply Air Temp - #{clg_sa_temp_f}F") sa_temp_sch.defaultDaySchedule.setName("Supply Air Temp - #{clg_sa_temp_f}F Default") sa_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), clg_sa_temp_c) air_flow_ratio = if building_type == 'Hospital' if sys_name == 'VAV_PATRMS' 0.5 elsif sys_name == 'VAV_1' || sys_name == 'VAV_2' 0.3 else 1 end else 0.3 end # air handler air_loop = OpenStudio::Model::AirLoopHVAC.new(model) if sys_name.nil? air_loop.setName("#{thermal_zones.size} Zone VAV") else air_loop.setName(sys_name) end air_loop.setAvailabilitySchedule(hvac_op_sch) sa_stpt_manager = OpenStudio::Model::SetpointManagerScheduled.new(model, sa_temp_sch) sa_stpt_manager.setName("#{thermal_zones.size} Zone VAV supply air setpoint manager") sa_stpt_manager.addToNode(air_loop.supplyOutletNode) # air handler controls sizing_system = air_loop.sizingSystem sizing_system.setMinimumSystemAirFlowRatio(air_flow_ratio) # sizing_system.setPreheatDesignTemperature(htg_oa_tdb_c) sizing_system.setPrecoolDesignTemperature(preclg_sa_temp_c) sizing_system.setCentralCoolingDesignSupplyAirTemperature(clg_sa_temp_c) sizing_system.setCentralHeatingDesignSupplyAirTemperature(htg_sa_temp_c) if building_type == 'Hospital' if sys_name == 'VAV_2' || sys_name == 'VAV_1' sizing_system.setSizingOption('Coincident') else sizing_system.setSizingOption('NonCoincident') end else sizing_system.setSizingOption('Coincident') end sizing_system.setAllOutdoorAirinCooling(false) sizing_system.setAllOutdoorAirinHeating(false) sizing_system.setSystemOutdoorAirMethod('ZoneSum') # fan fan = OpenStudio::Model::FanVariableVolume.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{air_loop.name} Fan") fan.setFanEfficiency(vav_fan_efficiency) fan.setMotorEfficiency(vav_fan_motor_efficiency) fan.setPressureRise(vav_fan_pressure_rise) fan.setFanPowerMinimumFlowRateInputMethod('fraction') fan.setFanPowerMinimumFlowFraction(0.25) fan.addToNode(air_loop.supplyInletNode) fan.setEndUseSubcategory('VAV system Fans') # heating coil if hot_water_loop.nil? htg_coil = OpenStudio::Model::CoilHeatingGas.new(model, model.alwaysOnDiscreteSchedule) htg_coil.setName("#{air_loop.name} Main Htg Coil") htg_coil.addToNode(air_loop.supplyInletNode) else htg_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) htg_coil.addToNode(air_loop.supplyInletNode) hot_water_loop.addDemandBranchForComponent(htg_coil) htg_coil.setName("#{air_loop.name} Main Htg Coil") htg_coil.controllerWaterCoil.get.setName("#{air_loop.name} Main Htg Coil Controller") htg_coil.setRatedInletWaterTemperature(hw_temp_c) htg_coil.setRatedOutletWaterTemperature(hw_temp_c - hw_delta_t_k) htg_coil.setRatedInletAirTemperature(htg_sa_temp_c) htg_coil.setRatedOutletAirTemperature(rht_sa_temp_c) end # cooling coil clg_coil = OpenStudio::Model::CoilCoolingWater.new(model, model.alwaysOnDiscreteSchedule) clg_coil.setName("#{air_loop.name} Clg Coil") clg_coil.addToNode(air_loop.supplyInletNode) clg_coil.setHeatExchangerConfiguration('CrossFlow') chilled_water_loop.addDemandBranchForComponent(clg_coil) clg_coil.controllerWaterCoil.get.setName("#{air_loop.name} Clg Coil Controller") # outdoor air intake system oa_intake_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_intake_controller.setName("#{air_loop.name} OA Controller") oa_intake_controller.setMinimumLimitType('FixedMinimum') oa_intake_controller.autosizeMinimumOutdoorAirFlowRate # oa_intake_controller.setMinimumOutdoorAirSchedule(oa_damper_sch) controller_mv = oa_intake_controller.controllerMechanicalVentilation controller_mv.setName("#{air_loop.name} Vent Controller") controller_mv.setSystemOutdoorAirMethod('VentilationRateProcedure') if building_type == 'LargeHotel' oa_intake_controller.setEconomizerControlType('DifferentialEnthalpy') oa_intake_controller.resetMaximumFractionofOutdoorAirSchedule oa_intake_controller.resetEconomizerMinimumLimitDryBulbTemperature end oa_intake = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_intake_controller) oa_intake.setName("#{air_loop.name} OA Sys") oa_intake.addToNode(air_loop.supplyInletNode) # The oa system need to be added before setting the night cycle control air_loop.setNightCycleControlType('CycleOnAny') # hook the VAV system to each zone thermal_zones.each do |zone| # reheat coil rht_coil = nil case reheat_type when 'NaturalGas' rht_coil = OpenStudio::Model::CoilHeatingGas.new(model, model.alwaysOnDiscreteSchedule) rht_coil.setName("#{zone.name} Rht Coil") when 'Electricity' rht_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) rht_coil.setName("#{zone.name} Rht Coil") when 'Water' rht_coil = OpenStudio::Model::CoilHeatingWater.new(model, model.alwaysOnDiscreteSchedule) rht_coil.setName("#{zone.name} Rht Coil") rht_coil.setRatedInletWaterTemperature(hw_temp_c) rht_coil.setRatedInletAirTemperature(htg_sa_temp_c) rht_coil.setRatedOutletWaterTemperature(hw_temp_c - hw_delta_t_k) rht_coil.setRatedOutletAirTemperature(rht_sa_temp_c) hot_water_loop.addDemandBranchForComponent(rht_coil) when nil # Zero-capacity, always-off electric heating coil rht_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOffDiscreteSchedule) rht_coil.setName("#{zone.name} No Reheat") rht_coil.setNominalCapacity(0) end # vav terminal terminal = OpenStudio::Model::AirTerminalSingleDuctVAVReheat.new(model, model.alwaysOnDiscreteSchedule, rht_coil) terminal.setName("#{zone.name} VAV Term") terminal.setZoneMinimumAirFlowMethod('Constant') air_terminal_single_duct_vav_reheat_apply_initial_prototype_damper_position(terminal, building_type, thermal_zone_outdoor_airflow_rate_per_area(zone)) terminal.setMaximumFlowFractionDuringReheat(0.5) terminal.setMaximumReheatAirTemperature(rht_sa_temp_c) air_loop.addBranchForZone(zone, terminal.to_StraightComponent) # Zone sizing # TODO Create general logic for cooling airflow method. # Large hotel uses design day with limit, school uses design day. sizing_zone = zone.sizingZone if building_type == 'SecondarySchool' sizing_zone.setCoolingDesignAirFlowMethod('DesignDay') else sizing_zone.setCoolingDesignAirFlowMethod('DesignDayWithLimit') end sizing_zone.setHeatingDesignAirFlowMethod('DesignDay') sizing_zone.setZoneCoolingDesignSupplyAirTemperature(clg_sa_temp_c) sizing_zone.setZoneHeatingDesignSupplyAirTemperature(zone_htg_sa_temp_c) unless return_plenum.nil? zone.setReturnPlenum(return_plenum) end end # Set the damper action based on the template. air_loop_hvac_apply_vav_damper_action(air_loop) return air_loop end |
#model_add_water_heater(model, water_heater_capacity, water_heater_volume, water_heater_fuel, service_water_temperature, parasitic_fuel_consumption_rate, swh_temp_sch, set_peak_use_flowrate, peak_flowrate, flowrate_schedule, water_heater_thermal_zone, building_type = nil) ⇒ OpenStudio::Model::WaterHeaterMixed
Creates a water heater and attaches it to the supplied service water heating loop.
Natural Gas, Electricity fuel consumption rate, in W schedule. If nil, will be defaulted. and flow rate schedule will be set. zones to place water heater in. If nil, will be assumed in 70F air for heat loss. the resulting water heater.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4149 def model_add_water_heater(model, water_heater_capacity, water_heater_volume, water_heater_fuel, service_water_temperature, parasitic_fuel_consumption_rate, swh_temp_sch, set_peak_use_flowrate, peak_flowrate, flowrate_schedule, water_heater_thermal_zone, building_type = nil) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', 'Adding water heater') # Water heater # TODO Standards - Change water heater methodology to follow # 'Model Enhancements Appendix A.' water_heater_capacity_btu_per_hr = OpenStudio.convert(water_heater_capacity, 'W', 'Btu/hr').get water_heater_capacity_kbtu_per_hr = OpenStudio.convert(water_heater_capacity_btu_per_hr, 'Btu/hr', 'kBtu/hr').get water_heater_vol_gal = OpenStudio.convert(water_heater_volume, 'm^3', 'gal').get # Temperature schedule type limits temp_sch_type_limits = OpenStudio::Model::ScheduleTypeLimits.new(model) temp_sch_type_limits.setName('Temperature Schedule Type Limits') temp_sch_type_limits.setLowerLimitValue(0.0) temp_sch_type_limits.setUpperLimitValue(100.0) temp_sch_type_limits.setNumericType('Continuous') temp_sch_type_limits.setUnitType('Temperature') if swh_temp_sch.nil? # Service water heating loop controls swh_temp_c = service_water_temperature swh_temp_f = OpenStudio.convert(swh_temp_c, 'C', 'F').get swh_delta_t_r = 9 # 9F delta-T swh_temp_c = OpenStudio.convert(swh_temp_f, 'F', 'C').get swh_delta_t_k = OpenStudio.convert(swh_delta_t_r, 'R', 'K').get swh_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) swh_temp_sch.setName("Service Water Loop Temp - #{swh_temp_f.round}F") swh_temp_sch.defaultDaySchedule.setName("Service Water Loop Temp - #{swh_temp_f.round}F Default") swh_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), swh_temp_c) swh_temp_sch.setScheduleTypeLimits(temp_sch_type_limits) end # Water heater depends on the fuel type water_heater = OpenStudio::Model::WaterHeaterMixed.new(model) water_heater.setName("#{water_heater_vol_gal.round}gal #{water_heater_fuel} Water Heater - #{water_heater_capacity_kbtu_per_hr.round}kBtu/hr") water_heater.setTankVolume(OpenStudio.convert(water_heater_vol_gal, 'gal', 'm^3').get) water_heater.setSetpointTemperatureSchedule(swh_temp_sch) if water_heater_thermal_zone.nil? # Assume the water heater is indoors at 70F for now default_water_heater_ambient_temp_sch = OpenStudio::Model::ScheduleRuleset.new(model) default_water_heater_ambient_temp_sch.setName('Water Heater Ambient Temp Schedule - 70F') default_water_heater_ambient_temp_sch.defaultDaySchedule.setName('Water Heater Ambient Temp Schedule - 70F Default') default_water_heater_ambient_temp_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), OpenStudio.convert(70, 'F', 'C').get) default_water_heater_ambient_temp_sch.setScheduleTypeLimits(temp_sch_type_limits) water_heater.setAmbientTemperatureIndicator('Schedule') water_heater.setAmbientTemperatureSchedule(default_water_heater_ambient_temp_sch) else water_heater.setAmbientTemperatureIndicator('ThermalZone') water_heater.setAmbientTemperatureThermalZone water_heater_thermal_zone end water_heater.setMaximumTemperatureLimit(OpenStudio.convert(180, 'F', 'C').get) water_heater.setDeadbandTemperatureDifference(OpenStudio.convert(3.6, 'R', 'K').get) water_heater.setHeaterControlType('Cycle') water_heater.setHeaterMaximumCapacity(OpenStudio.convert(water_heater_capacity_btu_per_hr, 'Btu/hr', 'W').get) water_heater.setOffCycleParasiticHeatFractiontoTank(0.8) water_heater.setIndirectWaterHeatingRecoveryTime(1.5) # 1.5hrs if water_heater_fuel == 'Electricity' water_heater.setHeaterFuelType('Electricity') water_heater.setHeaterThermalEfficiency(1.0) water_heater.setOffCycleParasiticFuelConsumptionRate(parasitic_fuel_consumption_rate) water_heater.setOnCycleParasiticFuelConsumptionRate(parasitic_fuel_consumption_rate) water_heater.setOffCycleParasiticFuelType('Electricity') water_heater.setOnCycleParasiticFuelType('Electricity') water_heater.setOffCycleLossCoefficienttoAmbientTemperature(1.053) water_heater.setOnCycleLossCoefficienttoAmbientTemperature(1.053) elsif water_heater_fuel == 'Natural Gas' water_heater.setHeaterFuelType('Gas') water_heater.setHeaterThermalEfficiency(0.78) water_heater.setOffCycleParasiticFuelConsumptionRate(parasitic_fuel_consumption_rate) water_heater.setOnCycleParasiticFuelConsumptionRate(parasitic_fuel_consumption_rate) water_heater.setOffCycleParasiticFuelType('Gas') water_heater.setOnCycleParasiticFuelType('Gas') water_heater.setOffCycleLossCoefficienttoAmbientTemperature(6.0) water_heater.setOnCycleLossCoefficienttoAmbientTemperature(6.0) end if set_peak_use_flowrate rated_flow_rate_m3_per_s = peak_flowrate rated_flow_rate_gal_per_min = OpenStudio.convert(rated_flow_rate_m3_per_s, 'm^3/s', 'gal/min').get water_heater.setPeakUseFlowRate(rated_flow_rate_m3_per_s) schedule = model_add_schedule(model, flowrate_schedule) water_heater.setUseFlowRateFractionSchedule(schedule) end return water_heater end |
#model_add_water_source_hp(model, condenser_loop, thermal_zones, ventilation = true) ⇒ Array<OpenStudio::Model::ZoneHVACWaterToAirHeatPump>
Adds zone level water-to-air heat pumps for each zone.
no ventilation will be supplied through the unit, with the expectation that it will be provided by a DOAS or separate system.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5398 def model_add_water_source_hp(model, condenser_loop, thermal_zones, ventilation = true) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', 'Adding zone water-to-air heat pump.') water_to_air_hp_systems = [] thermal_zones.each do |zone| supplemental_htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOnDiscreteSchedule) htg_coil = OpenStudio::Model::CoilHeatingWaterToAirHeatPumpEquationFit.new(model) htg_coil.setName('WSHP Htg Coil') htg_coil.setRatedHeatingCoefficientofPerformance(4.2) htg_coil.setHeatingCapacityCoefficient1(0.237847462869254) htg_coil.setHeatingCapacityCoefficient2(-3.35823796081626) htg_coil.setHeatingCapacityCoefficient3(3.80640467406376) htg_coil.setHeatingCapacityCoefficient4(0.179200417311554) htg_coil.setHeatingCapacityCoefficient5(0.12860719846082) htg_coil.setHeatingPowerConsumptionCoefficient1(-3.79175529243238) htg_coil.setHeatingPowerConsumptionCoefficient2(3.38799239505527) htg_coil.setHeatingPowerConsumptionCoefficient3(1.5022612076303) htg_coil.setHeatingPowerConsumptionCoefficient4(-0.177653510577989) htg_coil.setHeatingPowerConsumptionCoefficient5(-0.103079864171839) condenser_loop.addDemandBranchForComponent(htg_coil) clg_coil = OpenStudio::Model::CoilCoolingWaterToAirHeatPumpEquationFit.new(model) clg_coil.setName('WSHP Clg Coil') clg_coil.setRatedCoolingCoefficientofPerformance(3.4) clg_coil.setTotalCoolingCapacityCoefficient1(-4.30266987344639) clg_coil.setTotalCoolingCapacityCoefficient2(7.18536990534372) clg_coil.setTotalCoolingCapacityCoefficient3(-2.23946714486189) clg_coil.setTotalCoolingCapacityCoefficient4(0.139995928440879) clg_coil.setTotalCoolingCapacityCoefficient5(0.102660179888915) clg_coil.setSensibleCoolingCapacityCoefficient1(6.0019444814887) clg_coil.setSensibleCoolingCapacityCoefficient2(22.6300677244073) clg_coil.setSensibleCoolingCapacityCoefficient3(-26.7960783730934) clg_coil.setSensibleCoolingCapacityCoefficient4(-1.72374720346819) clg_coil.setSensibleCoolingCapacityCoefficient5(0.490644802367817) clg_coil.setSensibleCoolingCapacityCoefficient6(0.0693119353468141) clg_coil.setCoolingPowerConsumptionCoefficient1(-5.67775976415698) clg_coil.setCoolingPowerConsumptionCoefficient2(0.438988156976704) clg_coil.setCoolingPowerConsumptionCoefficient3(5.845277342193) clg_coil.setCoolingPowerConsumptionCoefficient4(0.141605667000125) clg_coil.setCoolingPowerConsumptionCoefficient5(-0.168727936032429) condenser_loop.addDemandBranchForComponent(clg_coil) # add fan fan = OpenStudio::Model::FanOnOff.new(model, model.alwaysOnDiscreteSchedule) fan.setName("#{zone.name} WSHP Fan") fan_static_pressure_in_h2o = 1.33 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan.setPressureRise(fan_static_pressure_pa) fan.setFanEfficiency(0.52) fan.setMotorEfficiency(0.8) water_to_air_hp_system = OpenStudio::Model::ZoneHVACWaterToAirHeatPump.new(model, model.alwaysOnDiscreteSchedule, fan, htg_coil, clg_coil, supplemental_htg_coil) water_to_air_hp_system.setName("#{zone.name} WSHP") unless ventilation water_to_air_hp_system.setOutdoorAirFlowRateDuringHeatingOperation(OpenStudio::OptionalDouble.new(0)) water_to_air_hp_system.setOutdoorAirFlowRateDuringCoolingOperation(OpenStudio::OptionalDouble.new(0)) water_to_air_hp_system.setOutdoorAirFlowRateWhenNoCoolingorHeatingisNeeded(OpenStudio::OptionalDouble.new(0)) end water_to_air_hp_system.addToThermalZone(zone) water_to_air_hp_systems << water_to_air_hp_system end return water_to_air_hp_systems end |
#model_add_window_ac(model, thermal_zones) ⇒ Array<OpenStudio::Model::ZoneHVACPackagedTerminalAirConditioner>
Adds a window air conditioner to each zone. Code adapted from: github.com/NREL/OpenStudio-BEopt/blob/master/measures/ResidentialHVACRoomAirConditioner/measure.rb
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4982 def model_add_window_ac(model, thermal_zones) # Defaults eer = 8.5 # Btu/W-h shr = 0.65 # The sensible heat ratio (ratio of the sensible portion of the load to the total load) at the nominal rated capacity airflow_cfm_per_ton = 350.0 # cfm/ton # Performance curves # From Frigidaire 10.7 EER unit in Winkler et. al. Lab Testing of Window ACs (2013) # NOTE: These coefficients are in SI UNITS cool_cap_ft_coeffs_si = [0.6405, 0.01568, 0.0004531, 0.001615, -0.0001825, 0.00006614] cool_eir_ft_coeffs_si = [2.287, -0.1732, 0.004745, 0.01662, 0.000484, -0.001306] cool_cap_fflow_coeffs = [0.887, 0.1128, 0] cool_eir_fflow_coeffs = [1.763, -0.6081, 0] cool_plf_fplr_coeffs = [0.78, 0.22, 0] # Make the curves roomac_cap_ft = create_curve_biquadratic(cool_cap_ft_coeffs_si, 'RoomAC-Cap-fT', 0, 100, 0, 100, nil, nil) roomac_cap_fff = create_curve_quadratic(cool_cap_fflow_coeffs, 'RoomAC-Cap-fFF', 0, 2, 0, 2, is_dimensionless = true) roomac_eir_ft = create_curve_biquadratic(cool_eir_ft_coeffs_si, 'RoomAC-EIR-fT', 0, 100, 0, 100, nil, nil) roomac_eir_fff = create_curve_quadratic(cool_eir_fflow_coeffs, 'RoomAC-EIR-fFF', 0, 2, 0, 2, is_dimensionless = true) roomac_plf_fplr = create_curve_quadratic(cool_plf_fplr_coeffs, 'RoomAC-PLF-fPLR', 0, 1, 0, 1, is_dimensionless = true) acs = [] thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding window AC for #{zone.name}.") clg_coil = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model, model.alwaysOnDiscreteSchedule, roomac_cap_ft, roomac_cap_fff, roomac_eir_ft, roomac_eir_fff, roomac_plf_fplr) clg_coil.setName('Window AC Clg Coil') clg_coil.setRatedSensibleHeatRatio(shr) clg_coil.setRatedCOP(OpenStudio::OptionalDouble.new(OpenStudio.convert(eer, 'Btu/h', 'W').get)) clg_coil.setRatedEvaporatorFanPowerPerVolumeFlowRate(OpenStudio::OptionalDouble.new(773.3)) clg_coil.setEvaporativeCondenserEffectiveness(OpenStudio::OptionalDouble.new(0.9)) clg_coil.setMaximumOutdoorDryBulbTemperatureForCrankcaseHeaterOperation(OpenStudio::OptionalDouble.new(10)) clg_coil.setBasinHeaterSetpointTemperature(OpenStudio::OptionalDouble.new(2)) fan = OpenStudio::Model::FanOnOff.new(model, model.alwaysOnDiscreteSchedule) fan.setName('Window AC Supply Fan') fan.setFanEfficiency(1) fan.setPressureRise(0) fan.setMotorEfficiency(1) fan.setMotorInAirstreamFraction(0) htg_coil = OpenStudio::Model::CoilHeatingElectric.new(model, model.alwaysOffDiscreteSchedule) htg_coil.setName('Window AC Always Off Htg Coil') ptac = OpenStudio::Model::ZoneHVACPackagedTerminalAirConditioner.new(model, model.alwaysOnDiscreteSchedule, fan, htg_coil, clg_coil) ptac.setName("#{zone.name} Window AC") ptac.(alwaysOffDiscreteSchedule) ptac.addToThermalZone(zone) acs << ptac end return acs end |
#model_add_zone_erv(model, thermal_zones) ⇒ Array<OpenStudio::Model::ZoneHVACEnergyRecoveryVentilator>
review the static pressure rise for the ERV
Adds zone level ERVs for each zone.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5475 def model_add_zone_erv(model, thermal_zones) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Model.Model', "Adding zone ERV for #{thermal_zones.size} zones.") thermal_zones.each do |zone| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Model.Model', "---#{zone.name}") end # ERV properties fan_static_pressure_in_h2o = 0.25 fan_static_pressure_pa = OpenStudio.convert(fan_static_pressure_in_h2o, 'inH_{2}O', 'Pa').get fan_motor_efficiency = 0.8 erv_systems = [] thermal_zones.each do |zone| # Determine the OA requirement for this zone min_oa_flow_m3_per_s_per_m2 = thermal_zone_outdoor_airflow_rate_per_area(zone) supply_fan = OpenStudio::Model::FanOnOff.new(model) supply_fan.setName("#{zone.name} ERV Supply Fan") supply_fan.setMotorEfficiency(fan_motor_efficiency) impeller_eff = fan_baseline_impeller_efficiency(supply_fan) fan_change_impeller_efficiency(supply_fan, impeller_eff) supply_fan.setPressureRise(fan_static_pressure_pa) supply_fan.setMotorInAirstreamFraction(1) exhaust_fan = OpenStudio::Model::FanOnOff.new(model) exhaust_fan.setName("#{zone.name} ERV Exhaust Fan") exhaust_fan.setMotorEfficiency(fan_motor_efficiency) fan_change_impeller_efficiency(exhaust_fan, impeller_eff) exhaust_fan.setPressureRise(fan_static_pressure_pa) exhaust_fan.setMotorInAirstreamFraction(1) erv_controller = OpenStudio::Model::ZoneHVACEnergyRecoveryVentilatorController.new(model) # erv_controller.setExhaustAirTemperatureLimit("NoExhaustAirTemperatureLimit") # erv_controller.setExhaustAirEnthalpyLimit("NoExhaustAirEnthalpyLimit") # erv_controller.setTimeofDayEconomizerFlowControlSchedule(self.alwaysOnDiscreteSchedule) # erv_controller.setHighHumidityControlFlag(false) heat_exchanger = OpenStudio::Model::HeatExchangerAirToAirSensibleAndLatent.new(model) # heat_exchanger.setHeatExchangerType("Plate") # heat_exchanger.setEconomizerLockout(true) # heat_exchanger.setSupplyAirOutletTemperatureControl(false) # heat_exchanger.setSensibleEffectivenessat100HeatingAirFlow(0.76) # heat_exchanger.setSensibleEffectivenessat75HeatingAirFlow(0.81) # heat_exchanger.setLatentEffectivenessat100HeatingAirFlow(0.68) # heat_exchanger.setLatentEffectivenessat75HeatingAirFlow(0.73) # heat_exchanger.setSensibleEffectivenessat100CoolingAirFlow(0.76) # heat_exchanger.setSensibleEffectivenessat75CoolingAirFlow(0.81) # heat_exchanger.setLatentEffectivenessat100CoolingAirFlow(0.68) # heat_exchanger.setLatentEffectivenessat75CoolingAirFlow(0.73) zone_hvac = OpenStudio::Model::ZoneHVACEnergyRecoveryVentilator.new(model, heat_exchanger, supply_fan, exhaust_fan) zone_hvac.setName("#{zone.name} ERV") zone_hvac.setVentilationRateperUnitFloorArea(min_oa_flow_m3_per_s_per_m2) zone_hvac.setController(erv_controller) zone_hvac.addToThermalZone(zone) # Calculate ERV SAT during sizing periods # Heating design day oat_f = 0 return_air_f = 68 eff = heat_exchanger.sensibleEffectivenessat100HeatingAirFlow coldest_erv_supply_f = oat_f - (eff * (oat_f - return_air_f)) coldest_erv_supply_c = OpenStudio.convert(coldest_erv_supply_f, 'F', 'C').get # Cooling design day oat_f = 110 return_air_f = 75 eff = heat_exchanger.sensibleEffectivenessat100CoolingAirFlow hottest_erv_supply_f = oat_f - (eff * (oat_f - return_air_f)) hottest_erv_supply_c = OpenStudio.convert(hottest_erv_supply_f, 'F', 'C').get # Ensure that zone sizing accounts for OA from ERV zone_sizing = zone.sizingZone zone_sizing.setAccountforDedicatedOutdoorAirSystem(true) zone_sizing.setDedicatedOutdoorAirSystemControlStrategy('ColdSupplyAir') zone_sizing.setDedicatedOutdoorAirLowSetpointTemperatureforDesign(coldest_erv_supply_c) zone_sizing.setDedicatedOutdoorAirHighSetpointTemperatureforDesign(hottest_erv_supply_c) erv_systems << zone_hvac end return erv_systems end |
#model_add_zone_ventilation(model, availability_sch_name, flow_rate, ventilation_type, thermal_zones) ⇒ Array<OpenStudio::Model::ZoneVentilationDesignFlowRate>
Adds a zone ventilation design flow rate to each zone.
Flow Rate per Zone Floor Area in m^3/s-m^2 for Intake
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5630 def model_add_zone_ventilation(model, availability_sch_name, flow_rate, ventilation_type, thermal_zones) # Make an exhaust fan for each zone zone_ventilations = [] thermal_zones.each do |zone| ventilation = OpenStudio::Model::ZoneVentilationDesignFlowRate.new(model) ventilation.setName("#{zone.name} Ventilation") ventilation.setSchedule(model_add_schedule(model, availability_sch_name)) ventilation.setVentilationType(ventilation_type) ventilation.setAirChangesperHour(0) ventilation.setTemperatureTermCoefficient(0) if ventilation_type == 'Exhaust' ventilation.setDesignFlowRateCalculationMethod('Flow/Zone') ventilation.setDesignFlowRate(flow_rate) ventilation.setFanPressureRise(31.1361206455786) ventilation.setFanTotalEfficiency(0.51) ventilation.setConstantTermCoefficient(1) ventilation.setVelocityTermCoefficient(0) ventilation.setMinimumIndoorTemperature(29.4444452244559) ventilation.setMaximumIndoorTemperature(100) ventilation.setDeltaTemperature(-100) elsif ventilation_type == 'Natural' ventilation.setDesignFlowRateCalculationMethod('Flow/Zone') ventilation.setDesignFlowRate(flow_rate) ventilation.setFanPressureRise(0) ventilation.setFanTotalEfficiency(1) ventilation.setConstantTermCoefficient(0) ventilation.setVelocityTermCoefficient(0.224) ventilation.setMinimumIndoorTemperature(-73.3333352760033) ventilation.setMaximumIndoorTemperature(29.4444452244559) ventilation.setDeltaTemperature(-100) elsif ventilation_type == 'Intake' ventilation.setDesignFlowRateCalculationMethod('Flow/Area') ventilation.setFlowRateperZoneFloorArea(flow_rate) ventilation.setFanPressureRise(49.8) ventilation.setFanTotalEfficiency(0.53625) ventilation.setConstantTermCoefficient(1) ventilation.setVelocityTermCoefficient(0) ventilation.setMinimumIndoorTemperature(7.5) ventilation.setMaximumIndoorTemperature(35) ventilation.setDeltaTemperature(-27.5) ventilation.setMinimumOutdoorTemperature(-30.0) ventilation.setMaximumOutdoorTemperature(50.0) ventilation.setMaximumWindSpeed(6.0) end ventilation.addToThermalZone(zone) zone_ventilations << ventilation end return zone_ventilations end |
#model_apply_hvac_efficiency_standard(model, climate_zone) ⇒ Object
Applies the HVAC parts of the template to all objects in the model using the the template specified in the model.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1813 def model_apply_hvac_efficiency_standard(model, climate_zone) sql_db_vars_map = {} OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Started applying HVAC efficiency standards.') # Air Loop Controls model.getAirLoopHVACs.sort.each { |obj| air_loop_hvac_apply_standard_controls(obj, climate_zone) } # Plant Loop Controls # TODO refactor: enable this code (missing before refactor) # getPlantLoops.sort.each { |obj| plant_loop_apply_standard_controls(obj, template, climate_zone) } ##### Apply equipment efficiencies # Fans model.getFanVariableVolumes.sort.each { |obj| fan_apply_standard_minimum_motor_efficiency(obj, fan_brake_horsepower(obj)) } model.getFanConstantVolumes.sort.each { |obj| fan_apply_standard_minimum_motor_efficiency(obj, fan_brake_horsepower(obj)) } model.getFanOnOffs.sort.each { |obj| fan_apply_standard_minimum_motor_efficiency(obj, fan_brake_horsepower(obj)) } model.getFanZoneExhausts.sort.each { |obj| fan_apply_standard_minimum_motor_efficiency(obj, fan_brake_horsepower(obj)) } # Pumps model.getPumpConstantSpeeds.sort.each { |obj| pump_apply_standard_minimum_motor_efficiency(obj) } model.getPumpVariableSpeeds.sort.each { |obj| pump_apply_standard_minimum_motor_efficiency(obj) } model.getHeaderedPumpsConstantSpeeds.sort.each { |obj| pump_apply_standard_minimum_motor_efficiency(obj) } model.getHeaderedPumpsVariableSpeeds.sort.each { |obj| pump_apply_standard_minimum_motor_efficiency(obj) } # Unitary HPs # set DX HP coils before DX clg coils because when DX HP coils need to first # pull the capacities of their paried DX clg coils, and this does not work # correctly if the DX clg coil efficiencies have been set because they are renamed. model.getCoilHeatingDXSingleSpeeds.sort.each { |obj| sql_db_vars_map = coil_heating_dx_single_speed_apply_efficiency_and_curves(obj, sql_db_vars_map) } # Unitary ACs model.getCoilCoolingDXTwoSpeeds.sort.each { |obj| sql_db_vars_map = coil_cooling_dx_two_speed_apply_efficiency_and_curves(obj, sql_db_vars_map) } model.getCoilCoolingDXSingleSpeeds.sort.each { |obj| sql_db_vars_map = coil_cooling_dx_single_speed_apply_efficiency_and_curves(obj, sql_db_vars_map) } # Chillers clg_tower_objs = model.getCoolingTowerSingleSpeeds model.getChillerElectricEIRs.sort.each { |obj| chiller_electric_eir_apply_efficiency_and_curves(obj, clg_tower_objs) } # Boilers model.getBoilerHotWaters.sort.each { |obj| boiler_hot_water_apply_efficiency_and_curves(obj) } # Water Heaters model.getWaterHeaterMixeds.sort.each { |obj| water_heater_mixed_apply_efficiency(obj) } # Cooling Towers model.getCoolingTowerSingleSpeeds.sort.each { |obj| cooling_tower_single_speed_apply_efficiency_and_curves(obj) } model.getCoolingTowerTwoSpeeds.sort.each { |obj| cooling_tower_two_speed_apply_efficiency_and_curves(obj) } model.getCoolingTowerVariableSpeeds.sort.each { |obj| cooling_tower_variable_speed_apply_efficiency_and_curves(obj) } # ERVs model.getHeatExchangerAirToAirSensibleAndLatents.each { |obj| heat_exchanger_air_to_air_sensible_and_latent_apply_efficiency(obj) } OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Finished applying HVAC efficiency standards.') end |
#model_apply_infiltration_standard(model) ⇒ Bool
This infiltration method is not used by the Reference
Apply the air leakage requirements to the model, as described in PNNL section 5.2.1.6. This method creates customized infiltration objects for each space and removes the SpaceType-level infiltration objects.
base infiltration rates off of. buildings, fix this inconsistency.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1892 def model_apply_infiltration_standard(model) # Set the infiltration rate at each space model.getSpaces.sort.each do |space| space_apply_infiltration_rate(space) end # Remove infiltration rates set at the space type model.getSpaceTypes.sort.each do |space_type| space_type.spaceInfiltrationDesignFlowRates.each(&:remove) end return true end |
#model_apply_multizone_vav_outdoor_air_sizing(model) ⇒ Object
This must be performed before the sizing run because
Applies the multi-zone VAV outdoor air sizing requirements to all applicable air loops in the model.
it impacts component sizes, which in turn impact efficiencies.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1802 def model_apply_multizone_vav_outdoor_air_sizing(model) OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Started applying multizone vav OA sizing.') # Multi-zone VAV outdoor air sizing model.getAirLoopHVACs.sort.each { |obj| air_loop_hvac_apply_multizone_vav_outdoor_air_sizing(obj) } OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Finished applying multizone vav OA sizing.') end |
#model_apply_prm_baseline_skylight_to_roof_ratio(model) ⇒ Object
support semiheated spaces as a separate SRR category
add skylight frame area to calculation of SRR
Reduces the SRR to the values specified by the PRM. SRR reduction will be done by shrinking vertices toward the centroid.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3644 def model_apply_prm_baseline_skylight_to_roof_ratio(model) # Loop through all spaces in the model, and # per the PNNL PRM Reference Manual, find the areas # of each space conditioning category (res, nonres, semi-heated) # separately. Include space multipliers. nr_wall_m2 = 0.001 # Avoids divide by zero errors later nr_sky_m2 = 0 res_wall_m2 = 0.001 res_sky_m2 = 0 sh_wall_m2 = 0.001 sh_sky_m2 = 0 total_roof_m2 = 0.001 total_subsurface_m2 = 0 model.getSpaces.sort.each do |space| # Loop through all surfaces in this space wall_area_m2 = 0 sky_area_m2 = 0 space.surfaces.sort.each do |surface| # Skip non-outdoor surfaces next unless surface.outsideBoundaryCondition == 'Outdoors' # Skip non-walls next unless surface.surfaceType == 'RoofCeiling' # This wall's gross area (including skylight area) wall_area_m2 += surface.grossArea * space.multiplier # Subsurfaces in this surface surface.subSurfaces.sort.each do |ss| next unless ss.subSurfaceType == 'Skylight' sky_area_m2 += ss.netArea * space.multiplier end end # Determine the space category cat = 'NonRes' if space_residential?(space) cat = 'Res' end # if space.is_semiheated # cat = 'Semiheated' # end # Add to the correct category case cat when 'NonRes' nr_wall_m2 += wall_area_m2 nr_sky_m2 += sky_area_m2 when 'Res' res_wall_m2 += wall_area_m2 res_sky_m2 += sky_area_m2 when 'Semiheated' sh_wall_m2 += wall_area_m2 sh_sky_m2 += sky_area_m2 end total_roof_m2 += wall_area_m2 total_subsurface_m2 += sky_area_m2 end # Calculate the SRR of each category srr_nr = ((nr_sky_m2 / nr_wall_m2) * 100).round(1) srr_res = ((res_sky_m2 / res_wall_m2) * 100).round(1) srr_sh = ((sh_sky_m2 / sh_wall_m2) * 100).round(1) srr = ((total_subsurface_m2 / total_roof_m2) * 100.0).round(1) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "The skylight to roof ratios (SRRs) are: NonRes: #{srr_nr.round}%, Res: #{srr_res.round}%.") # SRR limit srr_lim = model_prm_skylight_to_roof_ratio_limit(model) # Check against SRR limit red_nr = srr_nr > srr_lim red_res = srr_res > srr_lim red_sh = srr_sh > srr_lim # Stop here unless skylights need reducing return true unless red_nr || red_res || red_sh OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "Reducing the size of all skylights equally down to the limit of #{srr_lim.round}%.") # Determine the factors by which to reduce the skylight area mult_nr_red = srr_lim / srr_nr mult_res_red = srr_lim / srr_res # mult_sh_red = srr_lim / srr_sh # Reduce the skylight area if any of the categories necessary model.getSpaces.sort.each do |space| # Determine the space category cat = 'NonRes' if space_residential?(space) cat = 'Res' end # if space.is_semiheated # cat = 'Semiheated' # end # Skip spaces whose skylights don't need to be reduced case cat when 'NonRes' next unless red_nr mult = mult_nr_red when 'Res' next unless red_res mult = mult_res_red when 'Semiheated' next unless red_sh # mult = mult_sh_red end # Loop through all surfaces in this space space.surfaces.sort.each do |surface| # Skip non-outdoor surfaces next unless surface.outsideBoundaryCondition == 'Outdoors' # Skip non-walls next unless surface.surfaceType == 'RoofCeiling' # Subsurfaces in this surface surface.subSurfaces.sort.each do |ss| next unless ss.subSurfaceType == 'Skylight' # Reduce the size of the skylight red = 1.0 - mult sub_surface_reduce_area_by_percent_by_shrinking_toward_centroid(ss, red) end end end return true end |
#model_apply_prm_baseline_window_to_wall_ratio(model, climate_zone) ⇒ Object
add proper support for 90.1-2013 with all those building
support 90.1-2004 requirement that windows be modeled as
support semiheated spaces as a separate WWR category
add window frame area to calculation of WWR
Reduces the WWR to the values specified by the PRM. WWR reduction will be done by moving vertices inward toward centroid. This causes the least impact on the daylighting area calculations and controls placement.
type specific values horizontal bands. Currently just using existing window geometry, and shrinking as necessary if WWR is above limit.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3480 def model_apply_prm_baseline_window_to_wall_ratio(model, climate_zone) # Loop through all spaces in the model, and # per the PNNL PRM Reference Manual, find the areas # of each space conditioning category (res, nonres, semi-heated) # separately. Include space multipliers. nr_wall_m2 = 0.001 # Avoids divide by zero errors later nr_wind_m2 = 0 res_wall_m2 = 0.001 res_wind_m2 = 0 sh_wall_m2 = 0.001 sh_wind_m2 = 0 total_wall_m2 = 0.001 total_subsurface_m2 = 0.0 # Store the space conditioning category for later use space_cats = {} model.getSpaces.sort.each do |space| # Loop through all surfaces in this space wall_area_m2 = 0 wind_area_m2 = 0 space.surfaces.sort.each do |surface| # Skip non-outdoor surfaces next unless surface.outsideBoundaryCondition == 'Outdoors' # Skip non-walls next unless surface.surfaceType.casecmp('wall').zero? # This wall's gross area (including window area) wall_area_m2 += surface.grossArea * space.multiplier # Subsurfaces in this surface surface.subSurfaces.sort.each do |ss| next unless ss.subSurfaceType == 'FixedWindow' || ss.subSurfaceType == 'OperableWindow' wind_area_m2 += ss.netArea * space.multiplier end end # Determine the space category # TODO This should really use the heating/cooling loads # from the proposed building. However, in an attempt # to avoid another sizing run just for this purpose, # conditioned status is based on heating/cooling # setpoints. If heated-only, will be assumed Semiheated. # The full-bore method is on the next line in case needed. # cat = thermal_zone_conditioning_category(space, template, climate_zone) cooled = space_cooled?(space) heated = space_heated?(space) cat = 'Unconditioned' # Unconditioned if !heated && !cooled cat = 'Unconditioned' # Heated-Only elsif heated && !cooled cat = 'Semiheated' # Heated and Cooled else res = space_residential?(space) cat = if res 'ResConditioned' else 'NonResConditioned' end end space_cats[space] = cat # Add to the correct category case cat when 'Unconditioned' next # Skip unconditioned spaces when 'NonResConditioned' nr_wall_m2 += wall_area_m2 nr_wind_m2 += wind_area_m2 when 'ResConditioned' res_wall_m2 += wall_area_m2 res_wind_m2 += wind_area_m2 when 'Semiheated' sh_wall_m2 += wall_area_m2 sh_wind_m2 += wind_area_m2 end end # Calculate the WWR of each category wwr_nr = ((nr_wind_m2 / nr_wall_m2) * 100.0).round(1) wwr_res = ((res_wind_m2 / res_wall_m2) * 100).round(1) wwr_sh = ((sh_wind_m2 / sh_wall_m2) * 100).round(1) # Convert to IP and report nr_wind_ft2 = OpenStudio.convert(nr_wind_m2, 'm^2', 'ft^2').get nr_wall_ft2 = OpenStudio.convert(nr_wall_m2, 'm^2', 'ft^2').get res_wind_ft2 = OpenStudio.convert(res_wind_m2, 'm^2', 'ft^2').get res_wall_ft2 = OpenStudio.convert(res_wall_m2, 'm^2', 'ft^2').get sh_wind_ft2 = OpenStudio.convert(sh_wind_m2, 'm^2', 'ft^2').get sh_wall_ft2 = OpenStudio.convert(sh_wall_m2, 'm^2', 'ft^2').get OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "WWR NonRes = #{wwr_nr.round}%; window = #{nr_wind_ft2.round} ft2, wall = #{nr_wall_ft2.round} ft2.") OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "WWR Res = #{wwr_res.round}%; window = #{res_wind_ft2.round} ft2, wall = #{res_wall_ft2.round} ft2.") OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "WWR Semiheated = #{wwr_sh.round}%; window = #{sh_wind_ft2.round} ft2, wall = #{sh_wall_ft2.round} ft2.") # WWR limit wwr_lim = 40.0 # Check against WWR limit red_nr = wwr_nr > wwr_lim red_res = wwr_res > wwr_lim red_sh = wwr_sh > wwr_lim # Stop here unless windows need reducing return true unless red_nr || red_res || red_sh # Determine the factors by which to reduce the window area mult_nr_red = wwr_lim / wwr_nr mult_res_red = wwr_lim / wwr_res mult_sh_red = wwr_lim / wwr_sh # Reduce the window area if any of the categories necessary model.getSpaces.sort.each do |space| # Determine the space category # from the previously stored values cat = space_cats[space] # Get the correct multiplier case cat when 'Unconditioned' next # Skip unconditioned spaces when 'NonResConditioned' next unless red_nr mult = mult_nr_red when 'ResConditioned' next unless red_res mult = mult_res_red when 'Semiheated' next unless red_sh mult = mult_sh_red end # Loop through all surfaces in this space space.surfaces.sort.each do |surface| # Skip non-outdoor surfaces next unless surface.outsideBoundaryCondition == 'Outdoors' # Skip non-walls next unless surface.surfaceType.casecmp('wall').zero? # Subsurfaces in this surface surface.subSurfaces.sort.each do |ss| next unless ss.subSurfaceType == 'FixedWindow' || ss.subSurfaceType == 'OperableWindow' # Reduce the size of the window # If a vertical rectangle, raise sill height to avoid # impacting daylighting areas, otherwise # reduce toward centroid. red = 1.0 - mult if sub_surface_vertical_rectangle?(ss) sub_surface_reduce_area_by_percent_by_raising_sill(ss, red) else sub_surface_reduce_area_by_percent_by_shrinking_toward_centroid(ss, red) end end end end return true end |
#model_apply_prm_construction_types(model) ⇒ Bool
Go through the default construction sets and hard-assigned constructions. Clone the existing constructions and set their intended surface type and standards construction type per the PRM. For some standards, this will involve making modifications. For others, it will not.
90.1-2007, 90.1-2010, 90.1-2013
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3287 def model_apply_prm_construction_types(model) types_to_modify = [] # Possible boundary conditions are # Adiabatic # Surface # Outdoors # Ground # Possible surface types are # AtticFloor # AtticWall # AtticRoof # DemisingFloor # DemisingWall # DemisingRoof # ExteriorFloor # ExteriorWall # ExteriorRoof # ExteriorWindow # ExteriorDoor # GlassDoor # GroundContactFloor # GroundContactWall # GroundContactRoof # InteriorFloor # InteriorWall # InteriorCeiling # InteriorPartition # InteriorWindow # InteriorDoor # OverheadDoor # Skylight # TubularDaylightDome # TubularDaylightDiffuser # Possible standards construction types # Mass # SteelFramed # WoodFramed # IEAD # View # Daylight # Swinging # NonSwinging # Heated # Unheated # RollUp # Sliding # Metal # Nonmetal framing (all) # Metal framing (curtainwall/storefront) # Metal framing (entrance door) # Metal framing (all other) # Metal Building # Attic and Other # Glass with Curb # Plastic with Curb # Without Curb # Create an array of types types_to_modify << ['Outdoors', 'ExteriorWall', 'SteelFramed'] types_to_modify << ['Outdoors', 'ExteriorRoof', 'IEAD'] types_to_modify << ['Outdoors', 'ExteriorFloor', 'SteelFramed'] types_to_modify << ['Ground', 'GroundContactFloor', 'Unheated'] types_to_modify << ['Ground', 'GroundContactWall', 'Mass'] # Modify all constructions of each type types_to_modify.each do |boundary_cond, surf_type, const_type| constructions = model_find_constructions(model, boundary_cond, surf_type) constructions.sort.each do |const| standards_info = const.standardsInformation standards_info.setIntendedSurfaceType(surf_type) standards_info.setStandardsConstructionType(const_type) end end return true end |
#model_apply_prm_sizing_parameters(model) ⇒ Object
Changes the sizing parameters to the PRM specifications.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3826 def model_apply_prm_sizing_parameters(model) clg = 1.15 htg = 1.25 sizing_params = model.getSizingParameters sizing_params.setHeatingSizingFactor(htg) sizing_params.setCoolingSizingFactor(clg) OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.Model', "Set sizing factors to #{htg} for heating and #{clg} for cooling.") end |
#model_apply_standard_constructions(model, climate_zone) ⇒ Bool
Apply the standard construction to each surface in the model, based on the construction type currently assigned.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3372 def model_apply_standard_constructions(model, climate_zone) types_to_modify = [] # Possible boundary conditions are # Adiabatic # Surface # Outdoors # Ground # Possible surface types are # Floor # Wall # RoofCeiling # FixedWindow # OperableWindow # Door # GlassDoor # OverheadDoor # Skylight # TubularDaylightDome # TubularDaylightDiffuser # Create an array of surface types types_to_modify << ['Outdoors', 'Floor'] types_to_modify << ['Outdoors', 'Wall'] types_to_modify << ['Outdoors', 'RoofCeiling'] types_to_modify << ['Outdoors', 'FixedWindow'] types_to_modify << ['Outdoors', 'OperableWindow'] types_to_modify << ['Outdoors', 'Door'] types_to_modify << ['Outdoors', 'GlassDoor'] types_to_modify << ['Outdoors', 'OverheadDoor'] types_to_modify << ['Outdoors', 'Skylight'] types_to_modify << ['Ground', 'Floor'] types_to_modify << ['Ground', 'Wall'] # Find just those surfaces surfaces_to_modify = [] types_to_modify.each do |boundary_condition, surface_type| # Surfaces model.getSurfaces.sort.each do |surf| next unless surf.outsideBoundaryCondition == boundary_condition next unless surf.surfaceType == surface_type surfaces_to_modify << surf end # SubSurfaces model.getSubSurfaces.sort.each do |surf| next unless surf.outsideBoundaryCondition == boundary_condition next unless surf.subSurfaceType == surface_type surfaces_to_modify << surf end end # Modify these surfaces prev_created_consts = {} surfaces_to_modify.sort.each do |surf| prev_created_consts = planar_surface_apply_standard_construction(surf, climate_zone, prev_created_consts) end # List the unique array of constructions if prev_created_consts.size.zero? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Model', 'None of the constructions in your proposed model have both Intended Surface Type and Standards Construction Type') else prev_created_consts.each do |surf_type, construction| OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "For #{surf_type.join(' ')}, applied #{construction.name}.") end end return true end |
#model_assign_spaces_to_stories(model) ⇒ Bool
Assign each space in the model to a building story based on common z (height) values. If no story object is found for a particular height, create a new one and assign it to the space. Does not assign a story to plenum spaces.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1574 def model_assign_spaces_to_stories(model) # Make hash of spaces and minz values sorted_spaces = {} model.getSpaces.sort.each do |space| # Skip plenum spaces next if space_plenum?(space) # loop through space surfaces to find min z value z_points = [] space.surfaces.each do |surface| surface.vertices.each do |vertex| z_points << vertex.z end end minz = z_points.min + space.zOrigin sorted_spaces[space] = minz end # Pre-sort spaces sorted_spaces = sorted_spaces.sort_by { |a| a[1] } # Take the sorted list and assign/make stories sorted_spaces.each do |space| space_obj = space[0] space_minz = space[1] if space_obj.buildingStory.empty? story = model_get_story_for_nominal_z_coordinate(model, space_minz) space_obj.setBuildingStory(story) OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Standards.Model', "Space #{space[0].name} was not assigned to a story by the user. It has been assigned to #{story.name}.") end end return true end |
#model_attach_water_fixtures_to_spaces?(model) ⇒ Boolean
Determine whether or not water fixtures are attached to spaces
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4568 def model_attach_water_fixtures_to_spaces?(model) return false end |
#model_baseline_system_vav_fan_type(model) ⇒ String
Determines the fan type used by VAV_Reheat and VAV_PFP_Boxes systems. Defaults to two speed fan.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1255 def model_baseline_system_vav_fan_type(model) fan_type = 'TwoSpeed Fan' return fan_type end |
#model_create_exterior_lighting_area_length_count_hash(model, space_type_hash, use_model_for_entries_and_canopies) ⇒ hash
-
add code in to determine number of entries and canopy area from model geoemtry
-
come up with better logic for entry widths
get exterior lighting area’s, distances, and counts
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.Model.exterior_lights.rb', line 286 def model_create_exterior_lighting_area_length_count_hash(model, space_type_hash, use_model_for_entries_and_canopies) area_length_count_hash = {} # populate building_type_hash, used to remap office building_type_hash = {} space_type_hash.each do |space_type, hash| # update building_type_hash if building_type_hash.key?(hash[:stds_bldg_type]) building_type_hash[hash[:stds_bldg_type]] += hash[:floor_area] else building_type_hash[hash[:stds_bldg_type]] = hash[:floor_area] end end # rename Office to SmallOffice MediumOffice or LargeOffice office_type = nil if building_type_hash.key?('Office') office_type = model_remap_office(model, building_type_hash['Office']) end # parking areas and drives area parking_area_and_drives_area = 0.0 main_entries = 0.0 other_doors = 0.0 canopy_entry_area = 0.0 canopy_emergency_area = 0.0 drive_through_windows = 0.0 # run space_type_hash to get number of students and units and building type floor area totals space_type_hash.each do |space_type, hash| # rename space types as needed building_type = if hash[:stds_bldg_type] == 'Office' office_type else hash[:stds_bldg_type] end # store floor area ip floor_area_ip = OpenStudio.convert(hash[:floor_area], 'm^2', 'ft^2').get num_spots = 0.0 # load illuminated_parking_area_properties search_criteria = { 'building_type' => building_type } illuminated_parking_area_lookup = model_find_object(standards_data['parking'], search_criteria) if !illuminated_parking_area_lookup['building_area_per_spot'].nil? num_spots += floor_area_ip / illuminated_parking_area_lookup['building_area_per_spot'].to_f elsif !illuminated_parking_area_lookup['units_per_spot'].nil? num_spots += hash[:num_units] / illuminated_parking_area_lookup['units_per_spot'].to_f elsif !illuminated_parking_area_lookup['students_per_spot'].nil? num_spots += hash[:num_students] / illuminated_parking_area_lookup['students_per_spot'].to_f elsif !illuminated_parking_area_lookup['beds_per_spot'].nil? num_spots += hash[:num_beds] / illuminated_parking_area_lookup['beds_per_spot'].to_f else OpenStudio.logFree(OpenStudio::Info, 'openstudio.prototype.exterior_lights', "Unexpected key, can't calculate number of parking spots from #{illuminated_parking_area_lookup.keys.first}.") end parking_area_and_drives_area += num_spots * illuminated_parking_area_lookup['parking_area_per_spot'] # load illuninated_parking_area_properties search_criteria = { 'building_type' => building_type } exterior_lighting_assumptions_lookup = model_find_object(standards_data['entryways'], search_criteria) # lookup doors if use_model_for_entries_and_canopies # TODO: - get number of entries and canopy size from model geometry else # no source for width of different entry types main_entry_width_ip = 8 # ft other_doors_width_ip = 4 # ft # rollup not used main_entries += (floor_area_ip / 10_000.0) * exterior_lighting_assumptions_lookup['entrance_doors_per_10,000'] * main_entry_width_ip other_doors += (floor_area_ip / 10_000.0) * exterior_lighting_assumptions_lookup['others_doors_per_10,000'] * other_doors_width_ip unless exterior_lighting_assumptions_lookup['floor_area_per_drive_through_window'].nil? drive_through_windows += floor_area_ip / exterior_lighting_assumptions_lookup['floor_area_per_drive_through_window'].to_f end # if any space types of building type that has canopy, then use that value, don't add to count for additional space types if !exterior_lighting_assumptions_lookup['entrance_canopies'].nil? && !exterior_lighting_assumptions_lookup['canopy_size'].nil? canopy_entry_area = exterior_lighting_assumptions_lookup['entrance_canopies'] * exterior_lighting_assumptions_lookup['canopy_size'] end if !exterior_lighting_assumptions_lookup['emergency_canopies'].nil? && !exterior_lighting_assumptions_lookup['canopy_size'].nil? canopy_emergency_area = exterior_lighting_assumptions_lookup['emergency_canopies'] * exterior_lighting_assumptions_lookup['canopy_size'] end end end # populate hash area_length_count_hash[:parking_area_and_drives_area] = parking_area_and_drives_area area_length_count_hash[:main_entries] = main_entries area_length_count_hash[:other_doors] = other_doors area_length_count_hash[:canopy_entry_area] = canopy_entry_area area_length_count_hash[:canopy_emergency_area] = canopy_emergency_area area_length_count_hash[:drive_through_windows] = drive_through_windows # determine effective number of stories to find first above grade story exterior wall area effective_num_stories = model_effective_num_stories(model) ground_story = effective_num_stories[:story_hash].keys[effective_num_stories[:below_grade]] ground_story_ext_wall_area_si = effective_num_stories[:story_hash][ground_story][:ext_wall_area] ground_story_ext_wall_area_ip = OpenStudio.convert(ground_story_ext_wall_area_si, 'm^2', 'ft^2').get # building_facades # reference buildings uses first story and plenum area all around # prototype uses Table 4.19 by building type lit facde vs. total facade. area_length_count_hash[:building_facades] = ground_story_ext_wall_area_ip return area_length_count_hash end |
#model_create_prm_baseline_building(model, building_type, climate_zone, custom = nil, sizing_run_dir = Dir.pwd, debug = false) ⇒ Bool
Per 90.1, the Performance Rating Method “does NOT offer an alternative
Creates a Performance Rating Method (aka Appendix G aka LEED) baseline building model based on the inputs currently in the model. the current model with this model.
compliance path for minimum standard compliance.“ This means you can’t use this method for code compliance to get a permit. If nothing is specified, no custom logic will be applied; the process will follow the template logic explicitly.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 24 def model_create_prm_baseline_building(model, building_type, climate_zone, custom = nil, sizing_run_dir = Dir.pwd, debug = false) model.getBuilding.setName("#{template}-#{building_type}-#{climate_zone} PRM baseline created: #{Time.new}") # Remove external shading devices OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', '*** Removing External Shading Devices ***') model_remove_external_shading_devices(model) # Reduce the WWR and SRR, if necessary OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', '*** Adjusting Window and Skylight Ratios ***') model_apply_prm_baseline_window_to_wall_ratio(model, climate_zone) model_apply_prm_baseline_skylight_to_roof_ratio(model) # Assign building stories to spaces in the building # where stories are not yet assigned. model_assign_spaces_to_stories(model) # Modify the internal loads in each space type, # keeping user-defined schedules. OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', '*** Changing Lighting Loads ***') model.getSpaceTypes.sort.each do |space_type| set_people = false set_lights = true set_electric_equipment = false set_gas_equipment = false set_ventilation = false set_infiltration = false space_type_apply_internal_loads(space_type, set_people, set_lights, set_electric_equipment, set_gas_equipment, set_ventilation, set_infiltration) end # If any of the lights are missing schedules, assign an # always-off schedule to those lights. This is assumed to # be the user's intent in the proposed model. model.getLightss.sort.each do |lights| if lights.schedule.empty? lights.setSchedule(model.alwaysOffDiscreteSchedule) end end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', '*** Adding Daylighting Controls ***') # Run a sizing run to calculate VLT for layer-by-layer windows. if model_create_prm_baseline_building_requires_vlt_sizing_run(model) if model_run_sizing_run(model, "#{sizing_run_dir}/SRVLT") == false return false end end # Add daylighting controls to each space model.getSpaces.sort.each do |space| added = space_add_daylighting_controls(space, false, false) end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', '*** Applying Baseline Constructions ***') # Modify some of the construction types as necessary model_apply_prm_construction_types(model) # Set the construction properties of all the surfaces in the model model_apply_standard_constructions(model, climate_zone) # Get the groups of zones that define the # baseline HVAC systems for later use. # This must be done before removing the HVAC systems # because it requires knowledge of proposed HVAC fuels. OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', '*** Grouping Zones by Fuel Type and Occupancy Type ***') sys_groups = model_prm_baseline_system_groups(model, custom) # Remove all HVAC from model, # excluding service water heating model_remove_prm_hvac(model) # Modify the service water heating loops # per the baseline rules OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', '*** Cleaning up Service Water Heating Loops ***') model_apply_baseline_swh_loops(model, building_type) # Determine the baseline HVAC system type for each of # the groups of zones and add that system type. OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', '*** Adding Baseline HVAC Systems ***') sys_groups.each do |sys_group| # Determine the primary baseline system type system_type = model_prm_baseline_system_type(model, climate_zone, sys_group['occ'], sys_group['fuel'], sys_group['area_ft2'], sys_group['stories'], custom) sys_group['zones'].sort.each_slice(5) do |zone_list| zone_names = [] zone_list.each do |zone| zone_names << zone.name.get.to_s end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "--- #{zone_names.join(', ')}") end # Add the system type for these zones model_add_prm_baseline_system(model, system_type[0], system_type[1], system_type[2], system_type[3], sys_group['zones']) end # Set the zone sizing SAT for each zone in the model model.getThermalZones.each do |zone| thermal_zone_apply_prm_baseline_supply_temperatures(zone) end # Set the system sizing properties based on the zone sizing information model.getAirLoopHVACs.each do |air_loop| air_loop_hvac_apply_prm_sizing_temperatures(air_loop) end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', '*** Applying Baseline HVAC System Controls ***') # SAT reset, economizers model.getAirLoopHVACs.sort.each do |air_loop| air_loop_hvac_apply_prm_baseline_controls(air_loop, climate_zone) end # Apply the minimum damper positions, assuming no DDC control of VAV terminals model.getAirLoopHVACs.sort.each do |air_loop| air_loop_hvac_apply_minimum_vav_damper_positions(air_loop, false) end # Apply the baseline system temperatures model.getPlantLoops.sort.each do |plant_loop| # Skip the SWH loops next if plant_loop_swh_loop?(plant_loop) plant_loop_apply_prm_baseline_temperatures(plant_loop) end # Set the heating and cooling sizing parameters model_apply_prm_sizing_parameters(model) # Run sizing run with the HVAC equipment if model_run_sizing_run(model, "#{sizing_run_dir}/SR1") == false return false end # If there are any multizone systems, reset damper positions # to achieve a 60% ventilation effectiveness minimum for the system # following the ventilation rate procedure from 62.1 model_apply_multizone_vav_outdoor_air_sizing(model) # Set the baseline fan power for all airloops model.getAirLoopHVACs.sort.each do |air_loop| air_loop_hvac_apply_prm_baseline_fan_power(air_loop) end # Set the baseline fan power for all zone HVAC model.getZoneHVACComponents.sort.each do |zone_hvac| zone_hvac_component_apply_prm_baseline_fan_power(zone_hvac) end # Set the baseline number of boilers and chillers model.getPlantLoops.sort.each do |plant_loop| # Skip the SWH loops next if plant_loop_swh_loop?(plant_loop) plant_loop_apply_prm_number_of_boilers(plant_loop) plant_loop_apply_prm_number_of_chillers(plant_loop) end # Set the baseline number of cooling towers # Must be done after all chillers are added model.getPlantLoops.sort.each do |plant_loop| # Skip the SWH loops next if plant_loop_swh_loop?(plant_loop) plant_loop_apply_prm_number_of_cooling_towers(plant_loop) end # Run sizing run with the new chillers, boilers, and # cooling towers to determine capacities if model_run_sizing_run(model, "#{sizing_run_dir}/SR2") == false return false end # Set the pumping control strategy and power # Must be done after sizing components model.getPlantLoops.sort.each do |plant_loop| # Skip the SWH loops next if plant_loop_swh_loop?(plant_loop) plant_loop_apply_prm_baseline_pump_power(plant_loop) plant_loop_apply_prm_baseline_pumping_type(plant_loop) end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', '*** Applying Prescriptive HVAC Controls and Equipment Efficiencies ***') # Apply the HVAC efficiency standard model_apply_hvac_efficiency_standard(model, climate_zone) # Fix EMS references. # Temporary workaround for OS issue #2598 model_temp_fix_ems_references(model) # Delete all the unused curves model.getCurves.sort.each do |curve| if curve.directUseCount == 0 OpenStudio::logFree(OpenStudio::Debug, 'openstudio.standards.Model', "#{curve.name} is unused; it will be removed.") model.removeObject(curve.handle) end end # TODO: turn off self shading # Set Solar Distribution to MinimalShadowing... problem is when you also have detached shading such as surrounding buildings etc # It won't be taken into account, while it should: only self shading from the building itself should be turned off but to my knowledge there isn't a way to do this in E+ model_status = 'final' model.save(OpenStudio::Path.new("#{sizing_run_dir}/#{model_status}.osm"), true) # Translate to IDF and save for debugging forward_translator = OpenStudio::EnergyPlus::ForwardTranslator.new idf = forward_translator.translateModel(model) idf_path = OpenStudio::Path.new("#{sizing_run_dir}/#{model_status}.idf") idf.save(idf_path, true) return true end |
#model_create_prm_baseline_building_requires_vlt_sizing_run(model) ⇒ Object
Determine if there needs to be a sizing run after constructions are added so that EnergyPlus can calculate the VLTs of layer-by-layer glazing constructions. These VLT values are needed for the daylighting controls logic for some templates.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 250 def model_create_prm_baseline_building_requires_vlt_sizing_run(model) return false # Not required for most templates end |
#model_create_space_type_hash(model, trust_effective_num_spaces = false) ⇒ hash
-
add code when determining number of units to makeuse of trust_effective_num_spaces arg
create space_type_hash with info such as effective_num_spaces, num_units, num_meds, num_meals
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 4224 def model_create_space_type_hash(model, trust_effective_num_spaces = false) # assumed class size to deduct teachers from occupant count for classrooms typical_class_size = 20.0 space_type_hash = {} model.getSpaceTypes.sort.each do |space_type| # get standards info stds_bldg_type = space_type.standardsBuildingType stds_space_type = space_type.standardsSpaceType if stds_bldg_type.is_initialized && stds_space_type.is_initialized && !space_type.spaces.empty? stds_bldg_type = stds_bldg_type.get stds_space_type = stds_space_type.get effective_num_spaces = 0 floor_area = 0.0 num_people = 0.0 num_students = 0.0 num_units = 0.0 num_beds = 0.0 num_people_bldg_total = nil # may need this in future, not same as sumo of people for all space types. num_meals = nil # determine num_elevators in another method # determine num_parking_spots in another method # loop through spaces to get mis values space_type.spaces.sort.each do |space| next unless space.partofTotalFloorArea effective_num_spaces += space.multiplier floor_area += space.floorArea * space.multiplier num_people += space.numberOfPeople * space.multiplier end # determine number of units if stds_bldg_type == 'SmallHotel' && stds_space_type.include?('GuestRoom') # doesn't always == GuestRoom so use include? avg_unit_size = OpenStudio.convert(354.2, 'ft^2', 'm^2').get # calculated from prototype num_units = floor_area / avg_unit_size elsif stds_bldg_type == 'LargeHotel' && stds_space_type.include?('GuestRoom') avg_unit_size = OpenStudio.convert(279.7, 'ft^2', 'm^2').get # calculated from prototype num_units = floor_area / avg_unit_size elsif stds_bldg_type == 'MidriseApartment' && stds_space_type.include?('Apartment') avg_unit_size = OpenStudio.convert(949.9, 'ft^2', 'm^2').get # calculated from prototype num_units = floor_area / avg_unit_size elsif stds_bldg_type == 'HighriseApartment' && stds_space_type.include?('Apartment') avg_unit_size = OpenStudio.convert(949.9, 'ft^2', 'm^2').get # calculated from prototype num_units = floor_area / avg_unit_size elsif stds_bldg_type == 'StripMall' avg_unit_size = OpenStudio.convert(22_500.0 / 10.0, 'ft^2', 'm^2').get # calculated from prototype num_units = floor_area / avg_unit_size end # determine number of beds if stds_bldg_type == 'Hospital' && ['PatRoom', 'ICU_PatRm', 'ICU_Open'].include?(stds_space_type) num_beds = num_people end # determine number of students if ['PrimarySchool', 'SecondarySchool'].include?(stds_bldg_type) && stds_space_type == 'Classroom' num_students += num_people * ((typical_class_size - 1.0) / typical_class_size) end space_type_hash[space_type] = {} space_type_hash[space_type][:stds_bldg_type] = stds_bldg_type space_type_hash[space_type][:stds_space_type] = stds_space_type space_type_hash[space_type][:effective_num_spaces] = effective_num_spaces space_type_hash[space_type][:floor_area] = floor_area space_type_hash[space_type][:num_people] = num_people space_type_hash[space_type][:num_students] = num_students space_type_hash[space_type][:num_units] = num_units space_type_hash[space_type][:num_beds] = num_beds OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "For #{space_type.name}, floor area = #{OpenStudio.convert(floor_area, 'm^2', 'ft^2').get.round} ft^2.") unless floor_area == 0.0 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "For #{space_type.name}, number of spaces = #{effective_num_spaces}.") unless effective_num_spaces == 0.0 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "For #{space_type.name}, number of units = #{num_units}.") unless num_units == 0.0 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "For #{space_type.name}, number of people = #{num_people.round}.") unless num_people == 0.0 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "For #{space_type.name}, number of students = #{num_students}.") unless num_students == 0.0 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "For #{space_type.name}, number of beds = #{num_beds}.") unless num_beds == 0.0 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "For #{space_type.name}, number of meals = #{num_meals}.") unless num_meals.nil? else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "Cannot identify standards buidling type and space type for #{space_type.name}, it won't be added to space_type_hash.") end end return space_type_hash.sort.to_h end |
#model_create_story_hash(model) ⇒ hash
Create sorted hash of stories with data need to determine effective number of stories above and below grade the key should be the story object, which would allow other measures the ability to for example loop through spaces of the bottom story
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 4109 def model_create_story_hash(model) story_hash = {} # loop through stories model.getBuildingStorys.sort.each do |story| # skip of story doesn't have any spaces next if story.spaces.empty? story_min_z = nil story_zone_multipliers = [] story_spaces_part_of_floor_area = [] story_spaces_not_part_of_floor_area = [] story_ext_wall_area = 0.0 story_ground_wall_area = 0.0 # loop through space surfaces to find min z value story.spaces.each do |space| # skip of space doesn't have any geometry next if space.surfaces.empty? # get space multiplier story_zone_multipliers << space.multiplier # space part of floor area check if space.partofTotalFloorArea story_spaces_part_of_floor_area << space else story_spaces_not_part_of_floor_area << space end # update exterior wall area (not sure if this is net or gross) story_ext_wall_area += space.exteriorWallArea space_min_z = nil z_points = [] space.surfaces.each do |surface| surface.vertices.each do |vertex| z_points << vertex.z end # update count of ground wall areas next if surface.surfaceType != 'Wall' next if surface.outsideBoundaryCondition != 'Ground' # TODO: - make more flexible for slab/basement model.modeling story_ground_wall_area += surface.grossArea end # skip if surface had no vertices next if z_points.empty? # update story min_z space_min_z = z_points.min + space.zOrigin if story_min_z.nil? || (story_min_z > space_min_z) story_min_z = space_min_z end end # update story hash story_hash[story] = {} story_hash[story][:min_z] = story_min_z story_hash[story][:multipliers] = story_zone_multipliers story_hash[story][:part_of_floor_area] = story_spaces_part_of_floor_area story_hash[story][:not_part_of_floor_area] = story_spaces_not_part_of_floor_area story_hash[story][:ext_wall_area] = story_ext_wall_area story_hash[story][:ground_wall_area] = story_ground_wall_area end # sort hash by min_z low to high story_hash = story_hash.sort_by { |k, v| v[:min_z] } # reassemble into hash after sorting hash = {} story_hash.each do |story, props| hash[story] = props end return hash end |
#model_cw_loop_cooling_tower_fan_type(model) ⇒ String
Determine which type of fan the cooling tower will have. Defaults to TwoSpeed Fan.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5758 def model_cw_loop_cooling_tower_fan_type(model) fan_type = 'TwoSpeed Fan' return fan_type end |
#model_differentiate_primary_secondary_thermal_zones(model, zones) ⇒ Hash
Determine which of the zones should be served by the primary HVAC system. First, eliminate zones that differ by more than 40 full load hours per week. In this case, lighting schedule is used as the proxy for operation instead of occupancy to avoid accidentally removing transition spaces. Second, eliminate zones whose design internal loads differ from the area-weighted average of all other zones on the system by more than 10 Btu/hr*ft^2.
where the keys are ‘primary’ and ‘secondary’
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1409 def model_differentiate_primary_secondary_thermal_zones(model, zones) OpenStudio.logFree(OpenStudio::Info, 'openstudio.Standards.Model', 'Determining which zones are served by the primary vs. secondary HVAC system.') # Determine the operational hours (proxy is annual # full load lighting hours) for all zones zone_data_1 = [] zones.each do |zone| data = {} data['zone'] = zone # Get the area area_ft2 = OpenStudio.convert(zone.floorArea * zone.multiplier, 'm^2', 'ft^2').get data['area_ft2'] = area_ft2 # OpenStudio::logFree(OpenStudio::Info, "openstudio.Standards.Model", "#{zone.name}") zone.spaces.each do |space| # OpenStudio::logFree(OpenStudio::Info, "openstudio.Standards.Model", "***#{space.name}") # Get all lights from either the space # or the space type. all_lights = [] all_lights += space.lights if space.spaceType.is_initialized all_lights += space.spaceType.get.lights end # Base the annual operational hours # on the first lights schedule with hours # greater than zero. ann_op_hrs = 0 all_lights.sort.each do |lights| # OpenStudio::logFree(OpenStudio::Info, "openstudio.Standards.Model", "******#{lights.name}") # Get the fractional lighting schedule lights_sch = lights.schedule full_load_hrs = 0.0 # Skip lights with no schedule next if lights_sch.empty? lights_sch = lights_sch.get if lights_sch.to_ScheduleRuleset.is_initialized lights_sch = lights_sch.to_ScheduleRuleset.get full_load_hrs = schedule_ruleset_annual_equivalent_full_load_hrs(lights_sch) if full_load_hrs > 0 ann_op_hrs = full_load_hrs break # Stop after the first schedule with more than 0 hrs end elsif lights_sch.to_ScheduleConstant.is_initialized lights_sch = lights_sch.to_ScheduleConstant.get full_load_hrs = schedule_constant_annual_equivalent_full_load_hrs(lights_sch) if full_load_hrs > 0 ann_op_hrs = full_load_hrs break # Stop after the first schedule with more than 0 hrs end end end wk_op_hrs = ann_op_hrs / 52.0 data['wk_op_hrs'] = wk_op_hrs # OpenStudio::logFree(OpenStudio::Info, "openstudio.Standards.Model", "******wk_op_hrs = #{wk_op_hrs.round}") end zone_data_1 << data end # Filter out any zones that operate differently by more # than 40hrs/wk. This will be determined by a difference of more # than (40 hrs/wk * 52 wks/yr) = 2080 annual full load hrs. zones_same_hrs = model_eliminate_outlier_zones(model, zone_data_1, 'wk_op_hrs', 40, 'weekly operating hrs', 'hrs') # Get the internal loads for # all remaining zones. zone_data_2 = [] zones_same_hrs.each do |zn_data| data = {} zone = zn_data['zone'] data['zone'] = zone # Get the area area_m2 = zone.floorArea * zone.multiplier area_ft2 = OpenStudio.convert(area_m2, 'm^2', 'ft^2').get data['area_ft2'] = area_ft2 # Get the internal loads int_load_w = thermal_zone_design_internal_load(zone) # Normalize per-area int_load_w_per_m2 = int_load_w / area_m2 int_load_btu_per_ft2 = OpenStudio.convert(int_load_w_per_m2, 'W/m^2', 'Btu/hr*ft^2').get data['int_load_btu_per_ft2'] = int_load_btu_per_ft2 zone_data_2 << data end # Filter out any zones that are +/- 10 Btu/hr*ft^2 from the average pri_zn_data = model_eliminate_outlier_zones(model, zone_data_2, 'int_load_btu_per_ft2', 10, 'internal load', 'Btu/hr*ft^2') # Get just the primary zones themselves pri_zones = [] pri_zone_names = [] pri_zn_data.each do |zn_data| pri_zones << zn_data['zone'] pri_zone_names << zn_data['zone'].name.get.to_s end # Get the secondary zones sec_zones = [] sec_zone_names = [] zones.each do |zone| unless pri_zones.include?(zone) sec_zones << zone sec_zone_names << zone.name.get.to_s end end # Report out the primary vs. secondary zones unless pri_zone_names.empty? OpenStudio.logFree(OpenStudio::Info, 'openstudio.Standards.Model', "Primary system zones = #{pri_zone_names.join(', ')}.") end unless sec_zone_names.empty? OpenStudio.logFree(OpenStudio::Info, 'openstudio.Standards.Model', "Secondary system zones = #{sec_zone_names.join(', ')}.") end return { 'primary' => pri_zones, 'secondary' => sec_zones } end |
#model_effective_num_stories(model) ⇒ Object
populate this method Determine the effective number of stories above and below grade
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 4191 def model_effective_num_stories(model) below_grade = 0 above_grade = 0 # call model_create_story_hash(model) story_hash = model_create_story_hash(model) story_hash.each do |story, hash| # skip if no spaces in story are included in the building area next if hash[:part_of_floor_area].empty? # only count as below grade if ground wall area is greater than ext wall area and story below is also below grade if above_grade.zero? && (hash[:ground_wall_area] > hash[:ext_wall_area]) below_grade += 1 * hash[:multipliers].min else above_grade += 1 * hash[:multipliers].min end end # populate hash effective_num_stories = {} effective_num_stories[:below_grade] = below_grade effective_num_stories[:above_grade] = above_grade effective_num_stories[:story_hash] = story_hash return effective_num_stories end |
#model_elevator_fan_pwr(model, vent_rate_cfm) ⇒ Double
Determines the power of the elevator ventilation fan. Defaults to 90.1-2010, which had no requirement for ventilation fan efficiency.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.Model.elevators.rb', line 131 def model_elevator_fan_pwr(model, vent_rate_cfm) vent_pwr_per_flow_w_per_cfm = 0.33 vent_pwr_w = vent_pwr_per_flow_w_per_cfm * vent_rate_cfm return vent_pwr_w end |
#model_elevator_lift_power(model, elevator_type, building_type) ⇒ Object
Determines the power required by an individual elevator of a given type. Defaults to the values used by the DOE prototype buildings. Traction, Hydraulic
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.Model.elevators.rb', line 104 def model_elevator_lift_power(model, elevator_type, building_type) lift_pwr_w = 0 if elevator_type == 'Traction' lift_pwr_w = 20_370.0 elsif elevator_type == 'Hydraulic' lift_pwr_w = 16_055.0 else lift_pwr_w = 16_055.0 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', "Elevator type '#{elevator_type}', not recognized, will assume Hydraulic elevator, #{lift_pwr_w} W.") end return lift_pwr_w end |
#model_elevator_lighting_pct_incandescent(model) ⇒ Object
Determines the percentage of the elevator cab lighting that is incandescent. The remainder is assumed to be LED. Defaults to 70% incandescent, representing older elevators.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.Model.elevators.rb', line 122 def model_elevator_lighting_pct_incandescent(model) pct_incandescent = 0.7 return pct_incandescent end |
#model_eliminate_outlier_zones(model, array_of_zones, key_to_inspect, tolerance, field_name, units) ⇒ Object
with the keys ‘zone’,
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1336 def model_eliminate_outlier_zones(model, array_of_zones, key_to_inspect, tolerance, field_name, units) # Sort the zones by the desired key array_of_zones = array_of_zones.sort_by { |hsh| hsh[key_to_inspect] } # Calculate the area-weighted average total = 0.0 total_area = 0.0 all_vals = [] all_areas = [] all_zn_names = [] array_of_zones.each do |zn| val = zn[key_to_inspect] area = zn['area_ft2'] total += val * area total_area += area all_vals << val.round(1) all_areas << area.round all_zn_names << zn['zone'].name.get.to_s end avg = total / total_area OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "Values for #{field_name}, tol = #{tolerance} #{units}, area ft2:") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "vals #{all_vals.join(', ')}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "areas #{all_areas.join(', ')}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "names #{all_zn_names.join(', ')}") # Calculate the biggest delta # and the index of the biggest delta biggest_delta_i = nil biggest_delta = 0.0 worst = nil array_of_zones.each_with_index do |zn, i| val = zn[key_to_inspect] delta = (val - avg).abs if delta >= biggest_delta biggest_delta = delta biggest_delta_i = i worst = val end end # puts " #{worst} - #{avg.round} = #{biggest_delta.round} biggest delta" # Compare the biggest delta # against the difference and # eliminate that zone if higher # than the limit. if biggest_delta > tolerance zn_name = array_of_zones[biggest_delta_i]['zone'].name.get.to_s OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "For zone #{zn_name}, the #{field_name} of #{worst.round(1)} #{units} is more than #{tolerance} #{units} outside the area-weighted average of #{avg.round(1)} #{units}; it will be placed on its own secondary system.") array_of_zones.delete_at(biggest_delta_i) # Call method recursively if something was eliminated array_of_zones = model_eliminate_outlier_zones(model, array_of_zones, key_to_inspect, tolerance, field_name, units) else # OpenStudio::logFree(OpenStudio::Debug, 'openstudio.standards.Model', "#{worst.round(1)} - #{avg.round(1)} = #{biggest_delta.round(1)} #{units} < tolerance of #{tolerance} #{units}, stopping elimination process.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "#{worst} - #{avg} = #{biggest_delta} #{units} < tolerance of #{tolerance} #{units}, stopping elimination process.") end return array_of_zones end |
#model_find_and_add_construction(model, climate_zone_set, intended_surface_type, standards_construction_type, building_category) ⇒ Object
Helper method to find a particular construction and add it to the model after modifying the insulation value if necessary.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2507 def model_find_and_add_construction(model, climate_zone_set, intended_surface_type, standards_construction_type, building_category) # Get the construction properties, # which specifies properties by construction category by climate zone set. # AKA the info in Tables 5.5-1-5.5-8 props = model_find_object(standards_data['construction_properties'], 'template' => template, 'climate_zone_set' => climate_zone_set, 'intended_surface_type' => intended_surface_type, 'standards_construction_type' => standards_construction_type, 'building_category' => building_category) if !props OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Could not find construction properties for: #{template}-#{climate_zone_set}-#{intended_surface_type}-#{standards_construction_type}-#{building_category}.") # Return an empty construction construction = OpenStudio::Model::Construction.new(model) construction.setName('Could not find construction properties set to Adiabatic ') almost_adiabatic = OpenStudio::Model::MasslessOpaqueMaterial.new(model, 'Smooth', 500) construction.insertLayer(0, almost_adiabatic) return construction else # OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "Construction properties for: #{template}-#{climate_zone_set}-#{intended_surface_type}-#{standards_construction_type}-#{building_category} = #{props}.") end # Make sure that a construction is specified if props['construction'].nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "No typical construction is specified for construction properties of: #{template}-#{climate_zone_set}-#{intended_surface_type}-#{standards_construction_type}-#{building_category}. Make sure it is entered in the spreadsheet.") # Return an empty construction construction = OpenStudio::Model::Construction.new(model) construction.setName('No typical construction was specified') return construction end # Add the construction, modifying properties as necessary construction = model_add_construction(model, props['construction'], props) return construction end |
#model_find_ashrae_hot_water_demand(model) ⇒ Array
Returns average daily hot water consumption by building type recommendations from 2011 ASHRAE Handobook - HVAC Applications Table 7 section 60.14 Not all building types are included in lookup some recommendations have multiple values based on number of units. Will return an array of hashes. Many may have one array entry. all values other than block size are gallons.
specific to building type. Array will be empty for some building types.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3873 def model_find_ashrae_hot_water_demand(model) # TODO: - for types not in table use standards area normalized swh values # get building type building_data = model_get_building_climate_zone_and_building_type(model) building_type = building_data['building_type'] result = [] if building_type == 'FullServiceRestaurant' result << { units: 'meal', block: nil, max_hourly: 1.5, max_daily: 11.0, avg_day_unit: 2.4 } elsif building_type == 'Hospital' OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "No SWH rules of thumbs for #{building_type}.") elsif ['LargeHotel', 'SmallHotel'].include? building_type result << { units: 'unit', block: 20, max_hourly: 6.0, max_daily: 35.0, avg_day_unit: 24.0 } result << { units: 'unit', block: 60, max_hourly: 5.0, max_daily: 25.0, avg_day_unit: 14.0 } result << { units: 'unit', block: 100, max_hourly: 4.0, max_daily: 15.0, avg_day_unit: 10.0 } elsif building_type == 'MidriseApartment' result << { units: 'unit', block: 20, max_hourly: 12.0, max_daily: 80.0, avg_day_unit: 42.0 } result << { units: 'unit', block: 50, max_hourly: 10.0, max_daily: 73.0, avg_day_unit: 40.0 } result << { units: 'unit', block: 75, max_hourly: 8.5, max_daily: 66.0, avg_day_unit: 38.0 } result << { units: 'unit', block: 100, max_hourly: 7.0, max_daily: 60.0, avg_day_unit: 37.0 } result << { units: 'unit', block: 200, max_hourly: 5.0, max_daily: 50.0, avg_day_unit: 35.0 } elsif ['Office', 'LargeOffice', 'MediumOffice', 'SmallOffice'].include? building_type result << { units: 'person', block: nil, max_hourly: 0.4, max_daily: 2.0, avg_day_unit: 1.0 } elsif building_type == 'Outpatient' OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "No SWH rules of thumbs for #{building_type}.") elsif building_type == 'PrimarySchool' result << { units: 'student', block: nil, max_hourly: 0.6, max_daily: 1.5, avg_day_unit: 0.6 } elsif building_type == 'QuickServiceRestaurant' result << { units: 'meal', block: nil, max_hourly: 0.7, max_daily: 6.0, avg_day_unit: 0.7 } elsif building_type == 'Retail' OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "No SWH rules of thumbs for #{building_type}.") elsif building_type == 'SecondarySchool' result << { units: 'student', block: nil, max_hourly: 1.0, max_daily: 3.6, avg_day_unit: 1.8 } elsif building_type == 'StripMall' OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "No SWH rules of thumbs for #{building_type}.") elsif building_type == 'SuperMarket' OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "No SWH rules of thumbs for #{building_type}.") elsif building_type == 'Warehouse' OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "No SWH rules of thumbs for #{building_type}.") else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Didn't find expected building type. As a result can't determine hot water demand recommendations") end return result end |
#model_find_climate_zone_set(model, clim) ⇒ Object
Helper method to find out which climate zone set contains a specific climate zone. Returns climate zone set name as String if success, nil if not found.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 4034 def model_find_climate_zone_set(model, clim) result = nil possible_climate_zone_sets = [] standards_data['climate_zone_sets'].each do |climate_zone_set| if climate_zone_set['climate_zones'].include?(clim) possible_climate_zone_sets << climate_zone_set['name'] end end # Check the results if possible_climate_zone_sets.size.zero? OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Cannot find a climate zone set containing #{clim}") elsif possible_climate_zone_sets.size > 2 OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Found more than 2 climate zone sets containing #{clim}; will return last matching cliimate zone set.") end # Get the climate zone from the possible set climate_zone_set = model_get_climate_zone_set_from_list(model, possible_climate_zone_sets) # Check that a climate zone set was found if climate_zone_set.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Cannot find a climate zone set when #{template}") end return climate_zone_set end |
#model_find_constructions(model, boundary_condition, type) ⇒ Object
Get a unique list of constructions with given boundary condition and a given type of surface. Pulls from both default construction sets and hard-assigned constructions.
valid choices are: Adiabatic Surface Outdoors Ground valid choices are: AtticFloor AtticWall AtticRoof DemisingFloor DemisingWall DemisingRoof ExteriorFloor ExteriorWall ExteriorRoof ExteriorWindow ExteriorDoor GlassDoor GroundContactFloor GroundContactWall GroundContactRoof InteriorFloor InteriorWall InteriorCeiling InteriorPartition InteriorWindow InteriorDoor OverheadDoor Skylight TubularDaylightDome TubularDaylightDiffuser return [Array<OpenStudio::Model::ConstructionBase>] an array of all constructions.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3162 def model_find_constructions(model, boundary_condition, type) constructions = [] # From default construction sets model.getDefaultConstructionSets.sort.each do |const_set| ext_surfs = const_set.defaultExteriorSurfaceConstructions int_surfs = const_set.defaultInteriorSurfaceConstructions gnd_surfs = const_set.defaultGroundContactSurfaceConstructions ext_subsurfs = const_set.defaultExteriorSubSurfaceConstructions int_subsurfs = const_set.defaultInteriorSubSurfaceConstructions # Can't handle incomplete construction sets if ext_surfs.empty? || int_surfs.empty? || gnd_surfs.empty? || ext_subsurfs.empty? || int_subsurfs.empty? OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Space', "Default construction set #{const_set.name} is incomplete; contructions from this set will not be reported.") next end ext_surfs = ext_surfs.get int_surfs = int_surfs.get gnd_surfs = gnd_surfs.get ext_subsurfs = ext_subsurfs.get int_subsurfs = int_subsurfs.get case type # Exterior Surfaces when 'ExteriorWall', 'AtticWall' constructions << ext_surfs.wallConstruction when 'ExteriorFloor' constructions << ext_surfs.floorConstruction when 'ExteriorRoof', 'AtticRoof' constructions << ext_surfs.roofCeilingConstruction # Interior Surfaces when 'InteriorWall', 'DemisingWall', 'InteriorPartition' constructions << int_surfs.wallConstruction when 'InteriorFloor', 'AtticFloor', 'DemisingFloor' constructions << int_surfs.floorConstruction when 'InteriorCeiling', 'DemisingRoof' constructions << int_surfs.roofCeilingConstruction # Ground Contact Surfaces when 'GroundContactWall' constructions << gnd_surfs.wallConstruction when 'GroundContactFloor' constructions << gnd_surfs.floorConstruction when 'GroundContactRoof' constructions << gnd_surfs.roofCeilingConstruction # Exterior SubSurfaces when 'ExteriorWindow' constructions << ext_subsurfs.fixedWindowConstruction constructions << ext_subsurfs.operableWindowConstruction when 'ExteriorDoor' constructions << ext_subsurfs.doorConstruction when 'GlassDoor' constructions << ext_subsurfs.glassDoorConstruction when 'OverheadDoor' constructions << ext_subsurfs.overheadDoorConstruction when 'Skylight' constructions << ext_subsurfs.skylightConstruction when 'TubularDaylightDome' constructions << ext_subsurfs.tubularDaylightDomeConstruction when 'TubularDaylightDiffuser' constructions << ext_subsurfs.tubularDaylightDiffuserConstruction # Interior SubSurfaces when 'InteriorWindow' constructions << int_subsurfs.fixedWindowConstruction constructions << int_subsurfs.operableWindowConstruction when 'InteriorDoor' constructions << int_subsurfs.doorConstruction end end # Hard-assigned surfaces model.getSurfaces.sort.each do |surf| next unless surf.outsideBoundaryCondition == boundary_condition surf_type = surf.surfaceType if surf_type == 'Floor' || surf_type == 'Wall' next unless type.include?(surf_type) elsif surf_type == 'RoofCeiling' next unless type.include?('Roof') || type.include?('Ceiling') end constructions << surf.construction end # Hard-assigned subsurfaces model.getSubSurfaces.sort.each do |surf| next unless surf.outsideBoundaryCondition == boundary_condition surf_type = surf.subSurfaceType if surf_type == 'FixedWindow' || surf_type == 'OperableWindow' next unless type == 'ExteriorWindow' elsif surf_type == 'Door' next unless type.include?('Door') else next unless surf.subSurfaceType == type end constructions << surf.construction end # Throw out the empty constructions all_constructions = [] constructions.uniq.each do |const| next if const.empty? all_constructions << const.get end # Only return the unique list (should already be uniq) all_constructions = all_constructions.uniq # ConstructionBase can be sorted all_constructions = all_constructions.sort return all_constructions end |
#model_find_icc_iecc_2015_hot_water_demand(model, units_per_bldg, bedrooms_per_unit) ⇒ Double
Returns average daily hot water consumption for residential buildings gal/day from ICC IECC 2015 Residential Standard Reference Design from Table R405.5.2(1)
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3925 def model_find_icc_iecc_2015_hot_water_demand(model, units_per_bldg, bedrooms_per_unit) swh_gal_per_day = units_per_bldg * (30.0 + (10.0 * bedrooms_per_unit)) return swh_gal_per_day end |
#model_find_icc_iecc_2015_internal_loads(model, units_per_bldg, bedrooms_per_unit) ⇒ Hash
Returns average daily internal loads for residential buildings from Table R405.5.2(1)
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3935 def model_find_icc_iecc_2015_internal_loads(model, units_per_bldg, bedrooms_per_unit) # get total and conditioned floor area total_floor_area = model.getBuilding.floorArea if model.getBuilding.conditionedFloorArea.is_initialized conditioned_floor_area = model.getBuilding.conditionedFloorArea.get else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', 'Cannot find conditioned floor area, will use total floor area.') conditioned_floor_area = total_floor_area end # get climate zone value climate_zone_value = '' model.getClimateZones.climateZones.each do |cz| if cz.institution == 'ASHRAE' climate_zone_value = cz.value next end end internal_loads = {} internal_loads['mech_vent_cfm'] = units_per_bldg * (0.01 * conditioned_floor_area + 7.5 * (bedrooms_per_unit + 1.0)) internal_loads['infiltration_ach'] = if ['1A', '1B', '2A', '2B'].include? climate_zone_value 5.0 else 3.0 end internal_loads['igain_btu_per_day'] = units_per_bldg * (17_900.0 + 23.8 * conditioned_floor_area + 4104.0 * bedrooms_per_unit) internal_loads['internal_mass_lbs'] = total_floor_area * 8.0 return internal_loads end |
#model_find_object(hash_of_objects, search_criteria, capacity = nil, date = nil) ⇒ Hash
Method to search through a hash for an object that meets the desired search criteria, as passed via a hash. If capacity is supplied, the object will only be returned if the specified capacity is between the minimum_capacity and maximum_capacity values.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2056 def model_find_object(hash_of_objects, search_criteria, capacity = nil, date = nil) # new_matching_objects = model_find_objects(self, hash_of_objects, search_criteria, capacity) if hash_of_objects.is_a?(Hash) and hash_of_objects.key?('table') hash_of_objects = hash_of_objects['table'] end desired_object = nil search_criteria_matching_objects = [] matching_objects = [] # Compare each of the objects against the search criteria hash_of_objects.each do |object| meets_all_search_criteria = true search_criteria.each do |key, value| # Don't check non-existent search criteria next unless object.key?(key) # Stop as soon as one of the search criteria is not met # 'Any' is a special key that matches anything unless object[key] == value || object[key] == 'Any' meets_all_search_criteria = false break end end # Skip objects that don't meet all search criteria next unless meets_all_search_criteria # If made it here, object matches all search criteria search_criteria_matching_objects << object end # If capacity was specified, narrow down the matching objects if capacity.nil? matching_objects = search_criteria_matching_objects else # Round up if capacity is an integer if capacity == capacity.round capacity += (capacity * 0.01) end search_criteria_matching_objects.each do |object| # Skip objects that don't have fields for minimum_capacity and maximum_capacity next if !object.key?('minimum_capacity') || !object.key?('maximum_capacity') # Skip objects that don't have values specified for minimum_capacity and maximum_capacity next if object['minimum_capacity'].nil? || object['maximum_capacity'].nil? # Skip objects whose the minimum capacity is below the specified capacity next if capacity <= object['minimum_capacity'].to_f # Skip objects whose max next if capacity > object['maximum_capacity'].to_f # Found a matching object matching_objects << object end # If no object was found, round the capacity down a little # to avoid issues where the number fell between the limits # in the json file. if matching_objects.size.zero? capacity *= 0.99 search_criteria_matching_objects.each do |object| # Skip objects that don't have fields for minimum_capacity and maximum_capacity next if !object.key?('minimum_capacity') || !object.key?('maximum_capacity') # Skip objects that don't have values specified for minimum_capacity and maximum_capacity next if object['minimum_capacity'].nil? || object['maximum_capacity'].nil? # Skip objects whose the minimum capacity is below the specified capacity next if capacity <= object['minimum_capacity'].to_f # Skip objects whose max next if capacity > object['maximum_capacity'].to_f # Found a matching object matching_objects << object end end end # If date was specified, narrow down the matching objects unless date.nil? date_matching_objects = [] matching_objects.each do |object| # Skip objects that don't have fields for minimum_capacity and maximum_capacity next if !object.key?('start_date') || !object.key?('end_date') # Skip objects whose the start date is earlier than the specified date next if date <= Date.parse(object['start_date']) # Skip objects whose end date is beyond the specified date next if date > Date.parse(object['end_date']) # Found a matching object date_matching_objects << object end matching_objects = date_matching_objects end # Check the number of matching objects found if matching_objects.size.zero? desired_object = nil # OpenStudio::logFree(OpenStudio::Warn, 'openstudio.standards.Model', "Find object search criteria returned no results. Search criteria: #{search_criteria}, capacity = #{capacity}. Called from #{caller(0)[1]}") elsif matching_objects.size == 1 desired_object = matching_objects[0] else desired_object = matching_objects[0] OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Model', "Find object search criteria returned #{matching_objects.size} results, the first one will be returned. Called from #{caller(0)[1]}. \n Search criteria: \n #{search_criteria}, capacity = #{capacity} \n All results: \n #{matching_objects.join("\n")}") end return desired_object end |
#model_find_objects(hash_of_objects, search_criteria, capacity = nil) ⇒ Array
Method to search through a hash for the objects that meets the desired search criteria, as passed via a hash. Returns an Array (empty if nothing found) of matching objects.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1922 def model_find_objects(hash_of_objects, search_criteria, capacity = nil) # matching_objects = hash_of_objects.clone # #new # puts "searching" # puts search_criteria # raise ("hash of objects is nil or empty. #{hash_of_objects}") if hash_of_objects.nil? || hash_of_objects.empty? || matching_objects[0].nil? # # search_criteria.each do |key,value| # puts "#{key}-#{value}" # puts matching_objects.size # #if size has already reduced to zero. Get out of loop. # break if matching_objects.size == 0 # #if there are no keys that match, skip search... (This seems odd) # next unless matching_objects[0].has_key?(key) # matching_objects.select!{ |k| k[key] == value } # end # if not capacity.nil? # puts "Capacity = #{capacity}" # capacity = capacity + (capacity * 0.01) if capacity == capacity.round # matching_objects.select!{|k| capacity.to_f > k['minimum_capacity'].to_f} # matching_objects.select!{|k| capacity.to_f <= k['maximum_capacity'].to_f} # end # # # # Check the number of matching objects found # if matching_objects.size == 0 # OpenStudio::logFree(OpenStudio::Warn, 'openstudio.standards.Model', "Find objects search criteria returned no results. Search criteria: #{search_criteria}, capacity = #{capacity}. Called from #{caller(0)[1]}.") # # end # new_matching_objects = matching_objects # old desired_object = nil search_criteria_matching_objects = [] matching_objects = [] if hash_of_objects.is_a?(Hash) and hash_of_objects.key?('table') hash_of_objects = hash_of_objects['table'] end # Compare each of the objects against the search criteria hash_of_objects.each do |object| meets_all_search_criteria = true search_criteria.each do |key, value| # Don't check non-existent search criteria next unless object.key?(key) # Stop as soon as one of the search criteria is not met # 'Any' is a special key that matches anything unless object[key] == value || object[key] == 'Any' meets_all_search_criteria = false break end end # Skip objects that don't meet all search criteria next if meets_all_search_criteria == false # If made it here, object matches all search criteria search_criteria_matching_objects << object end # If capacity was specified, narrow down the matching objects if capacity.nil? matching_objects = search_criteria_matching_objects else # Round up if capacity is an integer if capacity == capacity.round capacity += (capacity * 0.01) end search_criteria_matching_objects.each do |object| # Skip objects that don't have fields for minimum_capacity and maximum_capacity next if !object.key?('minimum_capacity') || !object.key?('maximum_capacity') # Skip objects that don't have values specified for minimum_capacity and maximum_capacity next if object['minimum_capacity'].nil? || object['maximum_capacity'].nil? # Skip objects whose the minimum capacity is below the specified capacity next if capacity.to_f <= object['minimum_capacity'].to_f # Skip objects whose max next if capacity.to_f > object['maximum_capacity'].to_f # Found a matching object matching_objects << object end # If no object was found, round the capacity down a little # to avoid issues where the number fell between the limits # in the json file. if matching_objects.size.zero? capacity *= 0.99 search_criteria_matching_objects.each do |object| # Skip objects that don't have fields for minimum_capacity and maximum_capacity next if !object.key?('minimum_capacity') || !object.key?('maximum_capacity') # Skip objects that don't have values specified for minimum_capacity and maximum_capacity next if object['minimum_capacity'].nil? || object['maximum_capacity'].nil? # Skip objects whose the minimum capacity is below the specified capacity next if capacity <= object['minimum_capacity'].to_f # Skip objects whose max next if capacity > object['maximum_capacity'].to_f # Found a matching object matching_objects << object end end end # Check the number of matching objects found if matching_objects.size.zero? desired_object = nil # OpenStudio::logFree(OpenStudio::Warn, 'openstudio.standards.Model', "Find objects search criteria returned no results. Search criteria: #{search_criteria}, capacity = #{capacity}. Called from #{caller(0)[1]}.") end # if new_matching_objects != matching_objects # puts "new..." # puts new_matching_objects # puts "is not.." # puts matching_objects # raise ("Hell") # end return matching_objects end |
#model_find_prototype_floor_area(model, building_type) ⇒ Double
Keep track of floor area for prototype buildings. This is used to calculate EUI’s to compare against non prototype buildings Areas taken from scorecard Excel Files
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2957 def model_find_prototype_floor_area(model, building_type) if building_type == 'FullServiceRestaurant' # 5502 ft^2 result = 511 elsif building_type == 'Hospital' # 241,410 ft^2 (including basement) result = 22_422 elsif building_type == 'LargeHotel' # 122,132 ft^2 result = 11_345 elsif building_type == 'LargeOffice' # 498,600 ft^2 result = 46_320 elsif building_type == 'MediumOffice' # 53,600 ft^2 result = 4982 elsif building_type == 'MidriseApartment' # 33,700 ft^2 result = 3135 elsif building_type == 'Office' result = nil # TODO: - there shouldn't be a prototype building for this OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', 'Measures calling this should choose between SmallOffice, MediumOffice, and LargeOffice') elsif building_type == 'Outpatient' # 40.950 ft^2 result = 3804 elsif building_type == 'PrimarySchool' # 73,960 ft^2 result = 6871 elsif building_type == 'QuickServiceRestaurant' # 2500 ft^2 result = 232 elsif building_type == 'Retail' # 24,695 ft^2 result = 2294 elsif building_type == 'SecondarySchool' # 210,900 ft^2 result = 19_592 elsif building_type == 'SmallHotel' # 43,200 ft^2 result = 4014 elsif building_type == 'SmallOffice' # 5500 ft^2 result = 511 elsif building_type == 'StripMall' # 22,500 ft^2 result = 2090 elsif building_type == 'SuperMarket' # 45,002 ft2 (from legacy reference idf file) result = 4181 elsif building_type == 'Warehouse' # 49,495 ft^2 (legacy ref shows 52,045, but I wil calc using 49,495) result = 4595 else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Didn't find expected building type. As a result can't determine floor prototype floor area") result = nil end return result end |
#model_find_target_eui(model) ⇒ Double
user needs to pass in template as string. The building type and climate zone will come from the model. If the building type or ASHRAE climate zone is not set in the model this will return nil If the lookup doesn’t find matching simulation results this wil return nil
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3062 def model_find_target_eui(model) building_data = model_get_building_climate_zone_and_building_type(model) climate_zone = building_data['climate_zone'] building_type = building_data['building_type'] # look up results target_consumption = model_process_results_for_datapoint(model, climate_zone, building_type) # lookup target floor area for prototype buildings target_floor_area = model_find_prototype_floor_area(model, building_type) if target_consumption['total_legacy_energy_val'] > 0 if target_floor_area > 0 result = target_consumption['total_legacy_energy_val'] / target_floor_area else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', 'Cannot find prototype building floor area') result = nil end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Cannot find target results for #{climate_zone},#{building_type},#{template}") result = nil # couldn't calculate EUI consumpiton lookup failed end return result end |
#model_find_target_eui_by_end_use(model) ⇒ Hash
user needs to pass in template as string. The building type and climate zone will come from the model. If the building type or ASHRAE climate zone is not set in the model this will return nil If the lookup doesn’t find matching simulation results this wil return nil
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3093 def model_find_target_eui_by_end_use(model) building_data = model_get_building_climate_zone_and_building_type(model) climate_zone = building_data['climate_zone'] building_type = building_data['building_type'] # look up results target_consumption = model_process_results_for_datapoint(model, climate_zone, building_type) # lookup target floor area for prototype buildings target_floor_area = model_find_prototype_floor_area(model, building_type) if target_consumption['total_legacy_energy_val'] > 0 if target_floor_area > 0 result = {} target_consumption['total_energy_by_end_use'].each do |end_use, consumption| result[end_use] = consumption / target_floor_area end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', 'Cannot find prototype building floor area') result = nil end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Cannot find target results for #{climate_zone},#{building_type},#{template}") result = nil # couldn't calculate EUI consumpiton lookup failed end return result end |
#model_find_water_heater_capacity_volume_and_parasitic(model, water_use_equipment_array, pipe_hash = {}, storage_to_cap_ratio = 1.0, htg_eff = 0.8, inlet_temp_ip = 40.0, target_temp_ip = 140.0, peak_flow_fraction = 1.0) ⇒ Hash
set capacity, volume, and parasitic
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.Model.swh.rb', line 678 def model_find_water_heater_capacity_volume_and_parasitic(model, water_use_equipment_array, pipe_hash = {}, storage_to_cap_ratio = 1.0, htg_eff = 0.8, inlet_temp_ip = 40.0, target_temp_ip = 140.0, peak_flow_fraction = 1.0) # A.1.4 Total Storage Volume and Water Heater Capacity of PrototypeModelEnhancements_2014_0.pdf shows 1 gallon of storage to 1 kBtu/h of capacity water_heater_sizing = {} # get water use equipment max_flow_rate_array = [] # gallons per hour water_use_equipment_array.sort.each do |water_use_equip| water_use_equip_sch = water_use_equip.flowRateFractionSchedule next if water_use_equip_sch.empty? water_use_equip_sch = water_use_equip_sch.get if water_use_equip_sch.to_ScheduleRuleset.is_initialized water_use_equip_sch = water_use_equip_sch.to_ScheduleRuleset.get max_sch_value = schedule_ruleset_annual_min_max_value(water_use_equip_sch)['max'] elsif water_use_equip_sch.to_ScheduleConstant.is_initialized water_use_equip_sch = water_use_equip_sch.to_ScheduleConstant.get max_sch_value = schedule_constant_annual_min_max_value(water_use_equip_sch)['max'] elsif water_use_equip_sch.to_ScheduleCompact.is_initialized water_use_equip_sch = water_use_equip_sch.to_ScheduleCompact.get max_sch_value = schedule_compact_annual_min_max_value(water_use_equip_sch)['max'] end # get water_use_equip_def to get max flow rate water_use_equip_def = water_use_equip.waterUseEquipmentDefinition peak_flow_rate = water_use_equip_def.peakFlowRate # calculate adjusted flow rate adjusted_peak_flow_rate_si = max_sch_value * peak_flow_rate adjusted_peak_flow_rate_ip = OpenStudio.convert(adjusted_peak_flow_rate_si, 'm^3/s', 'gal/min').get max_flow_rate_array << adjusted_peak_flow_rate_ip * 60.0 # min per hour end # warn if max_flow_rate_array size doesn't match equipment size (one or more didn't have ruleset schedule) if max_flow_rate_array.size != water_use_equipment_array.size OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', 'One or more Water Use Equipment Fraction Flow Rate Scheules were not Schedule Rulestes and were excluding from Water Heating Sizing.') end # sum gpm values from water use equipment to use in formula adjusted_flow_rate_sum = max_flow_rate_array.inject(:+) # use formula to calculate volume and capacity based on analysis of combined water use equipment maximum flow rates and schedules # Max gal/hr * 8.4 lb/gal * 1 Btu/lb F * (120F - 40F)/0.8 = Btu/hr water_heater_capacity_ip = peak_flow_fraction * adjusted_flow_rate_sum * 8.4 * 1.0 * (target_temp_ip - inlet_temp_ip) / htg_eff OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', "Capacity of #{water_heater_capacity_ip} Btu/hr = #{peak_flow_fraction} peak fraction * #{adjusted_flow_rate_sum.round} gal/hr * 8.4 lb/gal * 1.0 Btu/lb F * (#{target_temp_ip.round} - #{inlet_temp_ip.round} deltaF / #{htg_eff} htg eff).") water_heater_capacity_si = OpenStudio.convert(water_heater_capacity_ip, 'Btu/hr', 'W').get # Assume 1 gal of volume per 1 kBtu/hr of heating capacity water_heater_volume_ip = OpenStudio.convert(water_heater_capacity_ip, 'Btu/hr', 'kBtu/hr').get # increase tank size to 40 galons if calculated value is smaller if water_heater_volume_ip < 40.0 # gal water_heater_volume_ip = 40.0 end water_heater_volume_si = OpenStudio.convert(water_heater_volume_ip, 'gal', 'm^3').get # populate return hash water_heater_sizing[:water_heater_capacity] = water_heater_capacity_si water_heater_sizing[:water_heater_volume] = water_heater_volume_si # get pipe length (formula from A.3.1 PrototypeModelEnhancements_2014_0.pdf) if !pipe_hash.empty? pipe_length = 2.0 * (Math.sqrt(pipe_hash[:floor_area] / pipe_hash[:effective_num_stories]) + (10.0 * (pipe_hash[:effective_num_stories] - 1.0))) pipe_length_ip = OpenStudio.convert(pipe_length, 'm', 'ft').get # calculate pipe dump (from A.4.1) pipe_dump = pipe_length_ip * 0.689 # Btu/hr pipe_loss_per_foot = if pipe_hash[:circulating] if pipe_hash[:insulation_thickness] >= 1.0 16.10 elsif pipe_hash[:insulation_thickness] >= 0.5 17.5 else 30.8 end else if pipe_hash[:insulation_thickness] >= 1.0 11.27 elsif pipe_hash[:insulation_thickness] >= 0.5 12.25 else 28.07 end end # calculate pipe loss (from Table A.3 in section A.4.2) pipe_loss = pipe_length * pipe_loss_per_foot # Btu/hr # calculate parasitic loss water_heater_sizing[:parasitic_fuel_consumption_rate] = pipe_dump + pipe_loss else water_heater_sizing[:parasitic_fuel_consumption_rate] = 0.0 end return water_heater_sizing end |
#model_get_baseline_system_type_by_zone(model, climate_zone, custom = nil) ⇒ Hash
Looks through the model and creates an hash of what the baseline system type should be for each zone.
PTHP, PTAC, PSZ_AC, PSZ_HP, PVAV_Reheat, PVAV_PFP_Boxes, VAV_Reheat, VAV_PFP_Boxes, Gas_Furnace, Electric_Furnace
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1266 def model_get_baseline_system_type_by_zone(model, climate_zone, custom = nil) zone_to_sys_type = {} # Get the groups of zones that define the # baseline HVAC systems for later use. # This must be done before removing the HVAC systems # because it requires knowledge of proposed HVAC fuels. sys_groups = model_prm_baseline_system_groups(model, custom) # Assign building stories to spaces in the building # where stories are not yet assigned. model_assign_spaces_to_stories(model) # Determine the baseline HVAC system type for each of # the groups of zones and add that system type. sys_groups.each do |sys_group| # Determine the primary baseline system type pri_system_type = model_prm_baseline_system_type(model, climate_zone, sys_group['occ'], sys_group['fuel'], sys_group['area_ft2'], sys_group['stories'], custom)[0] # Record the zone-by-zone system type assignments case pri_system_type when 'PTAC', 'PTHP', 'PSZ_AC', 'PSZ_HP', 'Gas_Furnace', 'Electric_Furnace' sys_group['zones'].each do |zone| zone_to_sys_type[zone] = pri_system_type end when 'PVAV_Reheat', 'PVAV_PFP_Boxes', 'VAV_Reheat', 'VAV_PFP_Boxes' # Determine the secondary system type sec_system_type = nil case pri_system_type when 'PVAV_Reheat', 'VAV_Reheat' sec_system_type = 'PSZ_AC' when 'PVAV_PFP_Boxes', 'VAV_PFP_Boxes' sec_system_type = 'PSZ_HP' end # Group zones by story story_zone_lists = model_group_zones_by_story(model, sys_group['zones']) # For the array of zones on each story, # separate the primary zones from the secondary zones. # Add the baseline system type to the primary zones # and add the suplemental system type to the secondary zones. story_zone_lists.each do |zones| # Differentiate primary and secondary zones pri_sec_zone_lists = model_differentiate_primary_secondary_thermal_zones(model, zones) # Record the primary zone system types pri_sec_zone_lists['primary'].each do |zone| zone_to_sys_type[zone] = pri_system_type end # Record the secondary zone system types pri_sec_zone_lists['secondary'].each do |zone| zone_to_sys_type[zone] = sec_system_type end end end end return zone_to_sys_type end |
#model_get_building_climate_zone_and_building_type(model, remap_office = true) ⇒ hash
this is used by other methods to get the clinzte aone and building type from a model. it has logic to break office into small, medium or large based on building area that can be turned off
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3005 def model_get_building_climate_zone_and_building_type(model, remap_office = true) # get climate zone from model # get ashrae climate zone from model climate_zone = '' model.getClimateZones.climateZones.each do |cz| if cz.institution == 'ASHRAE' climate_zone = if cz.value == '7' || cz.value == '8' "ASHRAE 169-2006-#{cz.value}A" else "ASHRAE 169-2006-#{cz.value}" end elsif cz.institution == 'CEC' climate_zone = "CEC T24-CEC#{cz.value}" end end # get building type from model building_type = '' if model.getBuilding.standardsBuildingType.is_initialized building_type = model.getBuilding.standardsBuildingType.get end # map office building type to small medium or large if building_type == 'Office' && remap_office open_studio_area = model.getBuilding.floorArea building_type = model_remap_office(model, open_studio_area) end results = {} results['climate_zone'] = climate_zone results['building_type'] = building_type return results end |
#model_get_climate_zone_set_from_list(model, possible_climate_zone_sets) ⇒ Object
Determine which climate zone to use. Defaults to the least specific climate zone set. For example, 2A and 2 both contain 2A, so use 2.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 4065 def model_get_climate_zone_set_from_list(model, possible_climate_zone_sets) climate_zone_set = possible_climate_zone_sets.sort.first return climate_zone_set end |
#model_get_construction_properties(model, intended_surface_type, standards_construction_type, building_category = 'Nonresidential') ⇒ hash
Returns standards data for selected construction
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3449 def model_get_construction_properties(model, intended_surface_type, standards_construction_type, building_category = 'Nonresidential') # get climate_zone_set climate_zone = model_get_building_climate_zone_and_building_type(model)['climate_zone'] climate_zone_set = model_find_climate_zone_set(model, climate_zone) # populate search hash search_criteria = { 'template' => template, 'climate_zone_set' => climate_zone_set, 'intended_surface_type' => intended_surface_type, 'standards_construction_type' => standards_construction_type, 'building_category' => building_category } # switch to use this but update test in standards and measures to load this outside of the method construction_properties = model_find_object(standards_data['construction_properties'], search_criteria) return construction_properties end |
#model_get_full_weather_file_path(model) ⇒ OpenStudio::OptionalPath
Get the full path to the weather file that is specified in the model.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2845 def model_get_full_weather_file_path(model) full_epw_path = OpenStudio::OptionalPath.new if model.weatherFile.is_initialized epw_path = model.weatherFile.get.path if epw_path.is_initialized if File.exist?(epw_path.get.to_s) full_epw_path = OpenStudio::OptionalPath.new(epw_path.get) else # If this is an always-run Measure, need to check a different path alt_weath_path = File.(File.join(Dir.pwd, '../../resources')) alt_epw_path = File.(File.join(alt_weath_path, epw_path.get.to_s)) if File.exist?(alt_epw_path) full_epw_path = OpenStudio::OptionalPath.new(OpenStudio::Path.new(alt_epw_path)) else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Model has been assigned a weather file, but the file is not in the specified location of '#{epw_path.get}'.") end end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', 'Model has a weather file assigned, but the weather file path has been deleted.') end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', 'Model has not been assigned a weather file.') end return full_epw_path end |
#model_get_lookup_name(building_type) ⇒ String
Unify the lookup names and eliminate this method
Get the name of the building type used in lookups
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# File 'lib/openstudio-standards/standards/standard.rb', line 50 def model_get_lookup_name(building_type) lookup_name = building_type case building_type when 'SmallOffice' lookup_name = 'Office' when 'MediumOffice' lookup_name = 'Office' when 'LargeOffice' lookup_name = 'Office' when 'LargeOfficeDetail' lookup_name = 'Office' when 'RetailStandalone' lookup_name = 'Retail' when 'RetailStripmall' lookup_name = 'StripMall' when 'Office' lookup_name = 'Office' end return lookup_name end |
#model_get_or_add_ambient_water_loop(model) ⇒ Object
Either get the existing ambient water loop in the model or add a new one if there isn’t one already.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5784 def model_get_or_add_ambient_water_loop(model) # Retrieve the existing hot water loop # or add a new one if necessary. ambient_water_loop = nil ambient_water_loop = if model.getPlantLoopByName('Ambient Loop').is_initialized model.getPlantLoopByName('Ambient Loop').get else model_add_district_ambient_loop(model) end return ambient_water_loop end |
#model_get_or_add_chilled_water_loop(model, cool_fuel, air_cooled = true) ⇒ Object
Either get the existing chilled water loop in the model or add a new one if there isn’t one already.
Electricity, DistrictCooling, and HeatPump.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5694 def model_get_or_add_chilled_water_loop(model, cool_fuel, air_cooled = true) # Retrieve the existing chilled water loop # or add a new one if necessary. chilled_water_loop = nil if model.getPlantLoopByName('Chilled Water Loop').is_initialized chilled_water_loop = model.getPlantLoopByName('Chilled Water Loop').get else case cool_fuel when 'DistrictCooling' chilled_water_loop = model_add_chw_loop(model, 'const_pri', chiller_cooling_type = nil, chiller_condenser_type = nil, chiller_compressor_type = nil, cool_fuel, condenser_water_loop = nil, building_type = nil) when 'HeatPump' condenser_water_loop = model_get_or_add_ambient_water_loop(model) chilled_water_loop = model_add_chw_loop(model, 'const_pri_var_sec', 'WaterCooled', chiller_condenser_type = nil, 'Rotary Screw', cooling_fuel = nil, condenser_water_loop, building_type = nil) when 'Electricity' if air_cooled chilled_water_loop = model_add_chw_loop(model, 'const_pri', chiller_cooling_type = nil, chiller_condenser_type = nil, chiller_compressor_type = nil, cool_fuel, condenser_water_loop = nil, building_type = nil) else fan_type = model_cw_loop_cooling_tower_fan_type(model) condenser_water_loop = model_add_cw_loop(model, 'Open Cooling Tower', 'Propeller or Axial', fan_type, 1, 1, nil) chilled_water_loop = model_add_chw_loop(model, 'const_pri_var_sec', 'WaterCooled', chiller_condenser_type = nil, 'Rotary Screw', cooling_fuel = nil, condenser_water_loop, building_type = nil) end end end return chilled_water_loop end |
#model_get_or_add_ground_hx_loop(model) ⇒ Object
Either get the existing ground heat exchanger loop in the model or add a new one if there isn’t one already.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5800 def model_get_or_add_ground_hx_loop(model) # Retrieve the existing ground HX loop # or add a new one if necessary. ground_hx_loop = nil ground_hx_loop = if model.getPlantLoopByName('Ground HX Loop').is_initialized model.getPlantLoopByName('Ground HX Loop').get else model_add_ground_hx_loop(model) end return ground_hx_loop end |
#model_get_or_add_heat_pump_loop(model) ⇒ Object
Either get the existing heat pump loop in the model or add a new one if there isn’t one already.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5816 def model_get_or_add_heat_pump_loop(model) # Retrieve the existing heat pump loop # or add a new one if necessary. heat_pump_loop = nil heat_pump_loop = if model.getPlantLoopByName('Heat Pump Loop').is_initialized model.getPlantLoopByName('Heat Pump Loop').get else model_add_hp_loop(model) end return heat_pump_loop end |
#model_get_or_add_hot_water_loop(model, heat_fuel) ⇒ Object
Either get the existing hot water loop in the model or add a new one if there isn’t one already.
Valid choices are NaturalGas, Electricity, DistrictHeating
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 5768 def model_get_or_add_hot_water_loop(model, heat_fuel) # Retrieve the existing hot water loop # or add a new one if necessary. hot_water_loop = nil hot_water_loop = if model.getPlantLoopByName('Hot Water Loop').is_initialized model.getPlantLoopByName('Hot Water Loop').get else model_add_hw_loop(model, heat_fuel) end return hot_water_loop end |
#model_get_story_for_nominal_z_coordinate(model, minz, tolerance = 0.3) ⇒ OpenStudio::Model::BuildingStory
Helper method to get the story object that cooresponds to a specific minimum z value. Makes a new story if none found at this height.
desired story, in meters. Default is 0.3 m ~1ft
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3847 def model_get_story_for_nominal_z_coordinate(model, minz, tolerance = 0.3) model.getBuildingStorys.sort.each do |story| z = building_story_minimum_z_value(story) if (minz - z).abs < tolerance OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Model', "The story with a min z value of #{minz.round(2)} is #{story.name}.") return story end end story = OpenStudio::Model::BuildingStory.new(model) story.setNominalZCoordinate(minz) OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Model', "No story with a min z value of #{minz.round(2)} m +/- #{tolerance} m was found, so a new story called #{story.name} was created.") return story end |
#model_group_zones_by_story(model, zones) ⇒ Array<Array<OpenStudio::Model::ThermalZone>>
Group an array of zones into multiple arrays, one for each story in the building. Zones with spaces on multiple stories will be assigned to only one of the stories. Removes empty array (when the story doesn’t contain any of the zones)
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 1529 def model_group_zones_by_story(model, zones) story_zone_lists = [] zones_already_assigned = [] model.getBuildingStorys.sort.each do |story| # Get all the spaces on this story spaces = story.spaces # Get all the thermal zones that serve these spaces all_zones_on_story = [] spaces.each do |space| if space.thermalZone.is_initialized all_zones_on_story << space.thermalZone.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Standards.Model', "Space #{space.name} has no thermal zone, it is not included in the simulation.") end end # Find zones in the list that are on this story zones_on_story = [] zones.each do |zone| if all_zones_on_story.include?(zone) # Skip zones that were already assigned to a story. # This can happen if a zone has multiple spaces on multiple stories. # Stairwells and atriums are typical scenarios. next if zones_already_assigned.include?(zone) zones_on_story << zone zones_already_assigned << zone end end unless zones_on_story.empty? story_zone_lists << zones_on_story end end return story_zone_lists end |
#model_make_name(model, clim, building_type, spc_type) ⇒ Object
Helper method to make a shortened version of a name that will be readable in a GUI.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3969 def model_make_name(model, clim, building_type, spc_type) clim = clim.gsub('ClimateZone ', 'CZ') if clim == 'CZ1-8' clim = '' end if building_type == 'FullServiceRestaurant' building_type = 'FullSrvRest' elsif building_type == 'Hospital' building_type = 'Hospital' elsif building_type == 'LargeHotel' building_type = 'LrgHotel' elsif building_type == 'LargeOffice' building_type = 'LrgOffice' elsif building_type == 'MediumOffice' building_type = 'MedOffice' elsif building_type == 'MidriseApartment' building_type = 'MidApt' elsif building_type == 'HighriseApartment' building_type = 'HighApt' elsif building_type == 'Office' building_type = 'Office' elsif building_type == 'Outpatient' building_type = 'Outpatient' elsif building_type == 'PrimarySchool' building_type = 'PriSchl' elsif building_type == 'QuickServiceRestaurant' building_type = 'QckSrvRest' elsif building_type == 'Retail' building_type = 'Retail' elsif building_type == 'SecondarySchool' building_type = 'SecSchl' elsif building_type == 'SmallHotel' building_type = 'SmHotel' elsif building_type == 'SmallOffice' building_type = 'SmOffice' elsif building_type == 'StripMall' building_type = 'StMall' elsif building_type == 'SuperMarket' building_type = 'SpMarket' elsif building_type == 'Warehouse' building_type = 'Warehouse' end parts = [template] unless building_type.nil? parts << building_type end unless spc_type.nil? parts << spc_type end unless clim.empty? parts << clim end result = parts.join(' - ') return result end |
#model_num_stories_spanned(model, zones) ⇒ Integer
Determine the number of stories spanned by the supplied zones. If all zones on one of the stories have an indentical multiplier, assume that the multiplier is a floor multiplier and increase the number of stories accordingly. Stories do not have to be contiguous.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 281 def model_num_stories_spanned(model, zones) # Get the story object for all zones stories = [] zones.each do |zone| zone.spaces.each do |space| story = space.buildingStory next if story.empty? stories << story.get end end # Reduce down to the unique set of stories stories = stories.uniq # Tally up stories including multipliers num_stories = 0 stories.each do |story| num_stories += building_story_floor_multiplier(story) end return num_stories end |
#model_prm_baseline_system_change_fuel_type(model, fuel_type, climate_zone, custom = nil) ⇒ String
Change the fuel type based on climate zone, depending on the standard. Defaults to no change.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 748 def model_prm_baseline_system_change_fuel_type(model, fuel_type, climate_zone, custom = nil) return fuel_type # Don't change fuel type for most templates end |
#model_prm_baseline_system_group_minimum_area(model, custom) ⇒ Double
Determines the area of the building above which point the non-dominant area type gets it’s own HVAC system type.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 629 def model_prm_baseline_system_group_minimum_area(model, custom) exception_min_area_ft2 = 20_000 exception_min_area_m2 = OpenStudio.convert(exception_min_area_ft2, 'ft^2', 'm^2').get return exception_min_area_m2 end |
#model_prm_baseline_system_groups(model, custom) ⇒ Array<Hash>
Determine the dominant and exceptional areas of the building based on fuel types and occupancy types.
with keys area_ft2, type, fuel, and zones (an array of zones)
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 352 def model_prm_baseline_system_groups(model, custom) # Define the minimum area for the # exception that allows a different # system type in part of the building. exception_min_area_m2 = model_prm_baseline_system_group_minimum_area(model, custom) exception_min_area_ft2 = OpenStudio.convert(exception_min_area_m2, 'm^2', 'ft^2').get # Get occupancy type, fuel type, and area information for all zones, # excluding unconditioned zones. # Occupancy types are: # Residential # NonResidential # (and for 90.1-2013) # PublicAssembly # Retail # Fuel types are: # fossil # electric # (and for Xcel Energy CO EDA) # fossilandelectric zones = model_zones_with_occ_and_fuel_type(model, custom) # Ensure that there is at least one conditioned zone if zones.size.zero? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Model', 'The building does not appear to have any conditioned zones. Make sure zones have thermostat with appropriate heating and cooling setpoint schedules.') return [] end # Group the zones by occupancy type type_to_area = Hash.new { 0.0 } zones_grouped_by_occ = zones.group_by { |z| z['occ'] } # Determine the dominant occupancy type by area zones_grouped_by_occ.each do |occ_type, zns| zns.each do |zn| type_to_area[occ_type] += zn['area'] end end dom_occ = type_to_area.sort_by { |k, v| v }.reverse[0][0] # Get the dominant occupancy type group dom_occ_group = zones_grouped_by_occ[dom_occ] # Check the non-dominant occupancy type groups to see if they # are big enough to trigger the occupancy exception. # If they are, leave the group standing alone. # If they are not, add the zones in that group # back to the dominant occupancy type group. occ_groups = [] zones_grouped_by_occ.each do |occ_type, zns| # Skip the dominant occupancy type next if occ_type == dom_occ # Add up the floor area of the group area_m2 = 0 zns.each do |zn| area_m2 += zn['area'] end area_ft2 = OpenStudio.convert(area_m2, 'm^2', 'ft^2').get # If the non-dominant group is big enough, preserve that group. if area_ft2 > exception_min_area_ft2 occ_groups << [occ_type, zns] OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "The portion of the building with an occupancy type of #{occ_type} is bigger than the minimum exception area of #{exception_min_area_ft2.round} ft2. It will be assigned a separate HVAC system type.") # Otherwise, add the zones back to the dominant group. else dom_occ_group += zns end end # Add the dominant occupancy group to the list occ_groups << [dom_occ, dom_occ_group] # Inside of each remaining occupancy group, # determine the dominant fuel type. This determination # should only include zones that are part of the # dominant area type inside of this group. occ_and_fuel_groups = [] occ_groups.each do |occ_type, zns| # Separate the zones that are part of the dominant occ type dom_occ_zns = [] nondom_occ_zns = [] zns.each do |zn| if zn['occ'] == occ_type dom_occ_zns << zn else nondom_occ_zns << zn end end # Determine the dominant fuel type # from the subset of the dominant area type zones fuel_to_area = Hash.new { 0.0 } zones_grouped_by_fuel = dom_occ_zns.group_by { |z| z['fuel'] } zones_grouped_by_fuel.each do |fuel, zns_by_fuel| zns_by_fuel.each do |zn| fuel_to_area[fuel] += zn['area'] end end sorted_by_area = fuel_to_area.sort_by { |k, v| v }.reverse dom_fuel = sorted_by_area[0][0] # Don't allow unconditioned to be the dominant fuel, # go to the next biggest if dom_fuel == 'unconditioned' if sorted_by_area.size > 1 dom_fuel = sorted_by_area[1][0] else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', 'The fuel type was not able to be determined for any zones in this model. Run with debug messages enabled to see possible reasons.') return [] end end # Get the dominant fuel type group dom_fuel_group = {} dom_fuel_group['occ'] = occ_type dom_fuel_group['fuel'] = dom_fuel dom_fuel_group['zones'] = zones_grouped_by_fuel[dom_fuel] # The zones that aren't part of the dominant occ type # are automatically added to the dominant fuel group dom_fuel_group['zones'] += nondom_occ_zns # Check the non-dominant occupancy type groups to see if they # are big enough to trigger the occupancy exception. # If they are, leave the group standing alone. # If they are not, add the zones in that group # back to the dominant occupancy type group. zones_grouped_by_fuel.each do |fuel_type, zns_by_fuel| # Skip the dominant occupancy type next if fuel_type == dom_fuel # Add up the floor area of the group area_m2 = 0 zns_by_fuel.each do |zn| area_m2 += zn['area'] end area_ft2 = OpenStudio.convert(area_m2, 'm^2', 'ft^2').get # If the non-dominant group is big enough, preserve that group. if area_ft2 > exception_min_area_ft2 group = {} group['occ'] = occ_type group['fuel'] = fuel_type group['zones'] = zns_by_fuel occ_and_fuel_groups << group OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "The portion of the building with an occupancy type of #{occ_type} and fuel type of #{fuel_type} is bigger than the minimum exception area of #{exception_min_area_ft2.round} ft2. It will be assigned a separate HVAC system type.") # Otherwise, add the zones back to the dominant group. else dom_fuel_group['zones'] += zns_by_fuel end end # Add the dominant occupancy group to the list occ_and_fuel_groups << dom_fuel_group end # Moved heated-only zones into their own groups. # Per the PNNL PRM RM, this must be done AFTER # the dominant occ and fuel types are determined # so that heated-only zone areas are part of # the determination. final_groups = [] occ_and_fuel_groups.each do |gp| # Skip unconditioned groups next if gp['fuel'] == 'unconditioned' heated_only_zones = [] heated_cooled_zones = [] gp['zones'].each do |zn| if thermal_zone_heated?(zn['zone']) && !thermal_zone_cooled?(zn['zone']) heated_only_zones << zn else heated_cooled_zones << zn end end gp['zones'] = heated_cooled_zones # Add the group (less unheated zones) to the final list final_groups << gp # If there are any heated-only zones, create # a new group for them. unless heated_only_zones.empty? htd_only_group = {} htd_only_group['occ'] = 'heatedonly' htd_only_group['fuel'] = gp['fuel'] htd_only_group['zones'] = heated_only_zones final_groups << htd_only_group end end # Calculate the area for each of the final groups # and replace the zone hashes with the zone objects final_groups.each do |gp| area_m2 = 0.0 gp_zns = [] gp['zones'].each do |zn| area_m2 += zn['area'] gp_zns << zn['zone'] end area_ft2 = OpenStudio.convert(area_m2, 'm^2', 'ft^2').get gp['area_ft2'] = area_ft2 gp['zones'] = gp_zns end # TODO: Remove the secondary zones before # determining the area used to pick the HVAC # system, per PNNL PRM RM # If there is any district heating or district cooling # in the proposed building, the heating and cooling # fuels in the entire baseline building are changed # for the purposes of HVAC system assignment all_htg_fuels = [] all_clg_fuels = [] model.getThermalZones.sort.each do |zone| all_htg_fuels += zone.heating_fuels all_clg_fuels += zone.cooling_fuels end purchased_heating = false purchased_cooling = false # Purchased heating if all_htg_fuels.include?('DistrictHeating') purchased_heating = true end # Purchased cooling if all_clg_fuels.include?('DistrictCooling') purchased_cooling = true end # Categorize district_fuel = nil if purchased_heating && purchased_cooling district_fuel = 'purchasedheatandcooling' OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', 'The proposed model included purchased heating and cooling. All baseline building system selection will be based on this information.') elsif purchased_heating && !purchased_cooling district_fuel = 'purchasedheat' OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', 'The proposed model included purchased heating. All baseline building system selection will be based on this information.') elsif !purchased_heating && purchased_cooling district_fuel = 'purchasedcooling' OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', 'The proposed model included purchased cooling. All baseline building system selection will be based on this information.') end # Change the fuel in all final groups # if district systems were found. if district_fuel final_groups.each do |gp| gp['fuel'] = district_fuel end end # Determine the number of stories spanned # by each group and report out info. final_groups.each do |group| # Determine the number of stories this group spans num_stories = model_num_stories_spanned(model, group['zones']) group['stories'] = num_stories # Report out the final grouping OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "Final system type group: occ = #{group['occ']}, fuel = #{group['fuel']}, area = #{group['area_ft2'].round} ft2, num stories = #{group['stories']}, zones:") group['zones'].sort.each_slice(5) do |zone_list| zone_names = [] zone_list.each do |zone| zone_names << zone.name.get.to_s end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "--- #{zone_names.join(', ')}") end end return final_groups end |
#model_prm_baseline_system_number(model, climate_zone, area_type, fuel_type, area_ft2, num_stories, custom) ⇒ String
Determines which system number is used for the baseline system. Default is 90.1-2004 approach. 5_or_6, 7_or_8, 9_or_10
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 716 def model_prm_baseline_system_number(model, climate_zone, area_type, fuel_type, area_ft2, num_stories, custom) sys_num = nil # Set the area limit limit_ft2 = 75_000 # Warn about heated only if area_type == 'heatedonly' OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Model', "Per Table G3.1.10.d, '(In the proposed building) Where no cooling system exists or no cooling system has been specified, the cooling system shall be identical to the system modeled in the baseline building design.' This requires that you go back and add a cooling system to the proposed model. This code cannot do that for you; you must do it manually.") end case area_type when 'residential' sys_num = '1_or_2' when 'nonresidential', 'heatedonly' # nonresidential and 3 floors or less and <25,000 ft2 if num_stories <= 3 && area_ft2 < limit_ft2 sys_num = '3_or_4' # nonresidential and 4 or 5 floors or 5 floors or less and 25,000 ft2 to 150,000 ft2 elsif ((num_stories == 4 || num_stories == 5) && area_ft2 < limit_ft2) || (num_stories <= 5 && (area_ft2 >= limit_ft2 && area_ft2 <= 150_000)) sys_num = '5_or_6' # nonresidential and more than 5 floors or >150,000 ft2 elsif num_stories >= 5 || area_ft2 > 150_000 sys_num = '7_or_8' end end return sys_num end |
#model_prm_baseline_system_type(model, climate_zone, area_type, fuel_type, area_ft2, num_stories, custom) ⇒ String
add 90.1-2013 systems 11-13
Determine the baseline system type given the inputs. Logic is different for different standards.
90.1-2007, 90.1-2010, 90.1-2013 nonresidential, and heatedonly electric, fossil, fossilandelectric, purchasedheat, purchasedcooling, purchasedheatandcooling PTHP, PTAC, PSZ_AC, PSZ_HP, PVAV_Reheat, PVAV_PFP_Boxes, VAV_Reheat, VAV_PFP_Boxes, Gas_Furnace, Electric_Furnace
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 650 def model_prm_baseline_system_type(model, climate_zone, area_type, fuel_type, area_ft2, num_stories, custom) # [type, central_heating_fuel, zone_heating_fuel, cooling_fuel] system_type = [nil, nil, nil, nil] # Get the row from TableG3.1.1A sys_num = model_prm_baseline_system_number(model, climate_zone, area_type, fuel_type, area_ft2, num_stories, custom) # Modify the fuel type if called for by the standard fuel_type = model_prm_baseline_system_change_fuel_type(model, fuel_type, climate_zone, custom) # Define the lookup by row and by fuel type sys_lookup = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) } # fossil, fossil and electric, purchased heat, purchased heat and cooling sys_lookup['1_or_2']['fossil'] = ['PTAC', 'NaturalGas', nil, 'Electricity'] sys_lookup['1_or_2']['fossilandelectric'] = ['PTAC', 'NaturalGas', nil, 'Electricity'] sys_lookup['1_or_2']['purchasedheat'] = ['PTAC', 'DistrictHeating', nil, 'Electricity'] sys_lookup['1_or_2']['purchasedheatandcooling'] = ['Fan_Coil', 'DistrictHeating', nil, 'DistrictCooling'] sys_lookup['3_or_4']['fossil'] = ['PSZ_AC', 'NaturalGas', nil, 'Electricity'] sys_lookup['3_or_4']['fossilandelectric'] = ['PSZ_AC', 'NaturalGas', nil, 'Electricity'] sys_lookup['3_or_4']['purchasedheat'] = ['PSZ_AC', 'DistrictHeating', nil, 'Electricity'] sys_lookup['3_or_4']['purchasedheatandcooling'] = ['PSZ_AC', 'DistrictHeating', nil, 'DistrictCooling'] sys_lookup['5_or_6']['fossil'] = ['PVAV_Reheat', 'NaturalGas', 'NaturalGas', 'Electricity'] sys_lookup['5_or_6']['fossilandelectric'] = ['PVAV_Reheat', 'NaturalGas', 'Electricity', 'Electricity'] sys_lookup['5_or_6']['purchasedheat'] = ['PVAV_Reheat', 'DistrictHeating', 'DistrictHeating', 'Electricity'] sys_lookup['5_or_6']['purchasedheatandcooling'] = ['PVAV_Reheat', 'DistrictHeating', 'DistrictHeating', 'DistrictCooling'] sys_lookup['7_or_8']['fossil'] = ['VAV_Reheat', 'NaturalGas', 'NaturalGas', 'Electricity'] sys_lookup['7_or_8']['fossilandelectric'] = ['VAV_Reheat', 'NaturalGas', 'Electricity', 'Electricity'] sys_lookup['7_or_8']['purchasedheat'] = ['VAV_Reheat', 'DistrictHeating', 'DistrictHeating', 'Electricity'] sys_lookup['7_or_8']['purchasedheatandcooling'] = ['VAV_Reheat', 'DistrictHeating', 'DistrictHeating', 'DistrictCooling'] sys_lookup['9_or_10']['fossil'] = ['Gas_Furnace', 'NaturalGas', nil, nil] sys_lookup['9_or_10']['fossilandelectric'] = ['Gas_Furnace', 'NaturalGas', nil, nil] sys_lookup['9_or_10']['purchasedheat'] = ['Gas_Furnace', 'DistrictHeating', nil, nil] sys_lookup['9_or_10']['purchasedheatandcooling'] = ['Gas_Furnace', 'DistrictHeating', nil, nil] # electric (heat), purchased cooling sys_lookup['1_or_2']['electric'] = ['PTHP', 'Electricity', nil, 'Electricity'] sys_lookup['1_or_2']['purchasedcooling'] = ['Fan_Coil', 'NaturalGas', nil, 'DistrictCooling'] sys_lookup['3_or_4']['electric'] = ['PSZ_HP', 'Electricity', nil, 'Electricity'] sys_lookup['3_or_4']['purchasedcooling'] = ['PSZ_AC', 'NaturalGas', nil, 'DistrictCooling'] sys_lookup['5_or_6']['electric'] = ['PVAV_PFP_Boxes', 'Electricity', 'Electricity', 'Electricity'] sys_lookup['5_or_6']['purchasedcooling'] = ['PVAV_PFP_Boxes', 'Electricity', 'Electricity', 'DistrictCooling'] sys_lookup['7_or_8']['electric'] = ['VAV_PFP_Boxes', 'Electricity', 'Electricity', 'Electricity'] sys_lookup['7_or_8']['purchasedcooling'] = ['VAV_PFP_Boxes', 'Electricity', 'Electricity', 'DistrictCooling'] sys_lookup['9_or_10']['electric'] = ['Electric_Furnace', 'Electricity', nil, nil] sys_lookup['9_or_10']['purchasedcooling'] = ['Electric_Furnace', 'Electricity', nil, nil] # Get the system type system_type = sys_lookup[sys_num][fuel_type] if system_type.nil? system_type = [nil, nil, nil, nil] OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Could not determine system type for #{template}, #{area_type}, #{fuel_type}, #{area_ft2.round} ft^2, #{num_stories} stories.") else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "System type is #{system_type[0]} for #{template}, #{area_type}, #{fuel_type}, #{area_ft2.round} ft^2, #{num_stories} stories.") OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "--- #{system_type[1]} for main heating") unless system_type[1].nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "--- #{system_type[2]} for zone heat/reheat") unless system_type[2].nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "--- #{system_type[3]} for cooling") unless system_type[3].nil? end return system_type end |
#model_prm_skylight_to_roof_ratio_limit(model) ⇒ Double
Determines the skylight to roof ratio limit for a given standard 5% by default.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3771 def model_prm_skylight_to_roof_ratio_limit(model) srr_lim = 5.0 return srr_lim end |
#model_process_results_for_datapoint(model, climate_zone, building_type) ⇒ Hash
Method to gather prototype simulation results for a specific climate zone, building type, and template
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 2878 def model_process_results_for_datapoint(model, climate_zone, building_type) # Combine the data from the JSON files into a single hash top_dir = File.('../../..', File.dirname(__FILE__)) standards_data_dir = "#{top_dir}/data/standards" # Load the legacy idf results JSON file into a ruby hash temp = '' begin temp = load_resource_relative('../../../data/standards/legacy_idf_results.json', 'r:UTF-8') rescue NoMethodError temp = File.read("#{standards_data_dir}/legacy_idf_results.json") end legacy_idf_results = JSON.parse(temp) # List of all fuel types fuel_types = ['Electricity', 'Natural Gas', 'Additional Fuel', 'District Cooling', 'District Heating', 'Water'] # List of all end uses end_uses = ['Heating', 'Cooling', 'Interior Lighting', 'Exterior Lighting', 'Interior Equipment', 'Exterior Equipment', 'Fans', 'Pumps', 'Heat Rejection', 'Humidification', 'Heat Recovery', 'Water Systems', 'Refrigeration', 'Generators'] # Get legacy idf results legacy_results_hash = {} legacy_results_hash['total_legacy_energy_val'] = 0 legacy_results_hash['total_legacy_water_val'] = 0 legacy_results_hash['total_energy_by_fuel'] = {} legacy_results_hash['total_energy_by_end_use'] = {} fuel_types.each do |fuel_type| end_uses.each do |end_use| next if end_use == 'Exterior Equipment' # Get the legacy results number legacy_val = legacy_idf_results.dig(building_type, template, climate_zone, fuel_type, end_use) # Combine the exterior lighting and exterior equipment if end_use == 'Exterior Lighting' legacy_exterior_equipment = legacy_idf_results.dig(building_type, template, climate_zone, fuel_type, 'Exterior Equipment') unless legacy_exterior_equipment.nil? legacy_val += legacy_exterior_equipment end end if legacy_val.nil? OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "#{fuel_type} #{end_use} legacy idf value not found") next end # Add the energy to the total if fuel_type == 'Water' legacy_results_hash['total_legacy_water_val'] += legacy_val else legacy_results_hash['total_legacy_energy_val'] += legacy_val # add to fuel specific total if legacy_results_hash['total_energy_by_fuel'][fuel_type] legacy_results_hash['total_energy_by_fuel'][fuel_type] += legacy_val # add to existing counter else legacy_results_hash['total_energy_by_fuel'][fuel_type] = legacy_val # start new counter end # add to end use specific total if legacy_results_hash['total_energy_by_end_use'][end_use] legacy_results_hash['total_energy_by_end_use'][end_use] += legacy_val # add to existing counter else legacy_results_hash['total_energy_by_end_use'][end_use] = legacy_val # start new counter end end end # Next end use end # Next fuel type return legacy_results_hash end |
#model_remap_office(model, floor_area) ⇒ String
remap office to one of the protptye buildings
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3043 def model_remap_office(model, floor_area) # prototype small office approx 500 m^2 # prototype medium office approx 5000 m^2 # prototype large office approx 50,000 m^2 # map office building type to small medium or large building_type = if floor_area < 2750 'SmallOffice' elsif floor_area < 25_250 'MediumOffice' else 'LargeOffice' end end |
#model_remove_external_shading_devices(model) ⇒ Bool
Remove external shading devices. Site shading will not be impacted.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3810 def model_remove_external_shading_devices(model) shading_surfaces_removed = 0 model.getShadingSurfaceGroups.sort.each do |shade_group| # Skip Site shading next if shade_group.shadingSurfaceType == 'Site' # Space shading surfaces should be removed shading_surfaces_removed += shade_group.shadingSurfaces.size shade_group.remove end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "Removed #{shading_surfaces_removed} external shading devices.") return true end |
#model_remove_prm_hvac(model) ⇒ Bool
Remove all HVAC that will be replaced during the performance rating method baseline generation. This does not include plant loops that serve WaterUse:Equipment or Fan:ZoneExhaust
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 3782 def model_remove_prm_hvac(model) # Plant loops model.getPlantLoops.sort.each do |loop| # Don't remove service water heating loops next if plant_loop_swh_loop?(loop) loop.remove end # Air loops model.getAirLoopHVACs.each(&:remove) # Zone equipment model.getThermalZones.sort.each do |zone| zone.equipment.each do |zone_equipment| next if zone_equipment.to_FanZoneExhaust.is_initialized zone_equipment.remove end end # Outdoor VRF units (not in zone, not in loops) model.getAirConditionerVariableRefrigerantFlows.each(&:remove) return true end |
#model_residential_and_nonresidential_floor_areas(model) ⇒ Hash
Determine the residential and nonresidential floor areas based on the space type properties for each space. For spaces with no space type, assume nonresidential.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 259 def model_residential_and_nonresidential_floor_areas(model) res_area_m2 = 0 nonres_area_m2 = 0 model.getSpaces.sort.each do |space| if thermal_zone_residential?(space) res_area_m2 += space.floorArea else nonres_area_m2 += space.floorArea end end return { 'residential' => res_area_m2, 'nonresidential' => nonres_area_m2 } end |
#model_swh_pump_type(model, building_type) ⇒ String
Determine the type of SWH pump that a model will have. Defaults to ConstantSpeed.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 4123 def model_swh_pump_type(model, building_type) swh_pump_type = 'ConstantSpeed' return swh_pump_type end |
#model_typical_hvac_system_type(model, climate_zone, area_type, delivery_type, heating_source, cooling_source, area_m2, num_stories) ⇒ String
Determine the typical system type given the inputs.
and nonresidential Valid choices are air and hydronic Electricity, NaturalGas, DistrictHeating, DistrictAmbient Electricity, DistrictCooling, DistrictAmbient PTHP, PTAC, PSZ_AC, PSZ_HP, PVAV_Reheat, PVAV_PFP_Boxes, VAV_Reheat, VAV_PFP_Boxes, Gas_Furnace, Electric_Furnace
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb', line 6287 def model_typical_hvac_system_type(model, climate_zone, area_type, delivery_type, heating_source, cooling_source, area_m2, num_stories) # [type, central_heating_fuel, zone_heating_fuel, cooling_fuel] system_type = [nil, nil, nil, nil] # Convert area to ft^2 area_ft2 = OpenStudio.convert(area_m2, 'm^2', 'ft^2').get # categorize building by type & size size_category = nil case area_type when 'residential' # residential and less than 4 stories size_category = if num_stories <= 3 'res_small' # residential and more than 4 stories else 'res_med' end when 'nonresidential', 'retail', 'publicassembly', 'heatedonly' # nonresidential and 3 floors or less and < 75,000 ft2 if num_stories <= 3 && area_ft2 < 75_000 size_category = 'nonres_small' # nonresidential and 4 or 5 floors OR 5 floors or less and 75,000 ft2 to 150,000 ft2 elsif ((num_stories == 4 || num_stories == 5) && area_ft2 < 75_000) || (num_stories <= 5 && (area_ft2 >= 75_000 && area_ft2 <= 150_000)) size_category = 'nonres_med' # nonresidential and more than 5 floors or >150,000 ft2 elsif num_stories >= 5 || area_ft2 > 150_000 size_category = 'nonres_lg' end end # Define the lookup by row and by fuel type syts = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) } # [heating_source][cooling_source][delivery_type][size_category] # = [type, central_heating_fuel, zone_heating_fuel, cooling_fuel] ## Forced Air ## # Gas, Electric, forced air syts['NaturalGas']['Electricity']['air']['res_small'] = ['PTAC', 'NaturalGas', nil, 'Electricity'] syts['NaturalGas']['Electricity']['air']['res_med'] = ['PTAC', 'NaturalGas', nil, 'Electricity'] syts['NaturalGas']['Electricity']['air']['nonres_small'] = ['PSZ-AC', 'NaturalGas', nil, 'Electricity'] syts['NaturalGas']['Electricity']['air']['nonres_med'] = ['PVAV Reheat', 'NaturalGas', 'NaturalGas', 'Electricity'] syts['NaturalGas']['Electricity']['air']['nonres_lg'] = ['VAV Reheat', 'NaturalGas', 'NaturalGas', 'Electricity'] # Electric, Electric, forced air syts['Electricity']['Electricity']['air']['res_small'] = ['PTHP', 'Electricity', nil, 'Electricity'] syts['Electricity']['Electricity']['air']['res_med'] = ['PTHP', 'Electricity', nil, 'Electricity'] syts['Electricity']['Electricity']['air']['nonres_small'] = ['PSZ-HP', 'Electricity', nil, 'Electricity'] syts['Electricity']['Electricity']['air']['nonres_med'] = ['PVAV PFP Boxes', 'Electricity', 'Electricity', 'Electricity'] syts['Electricity']['Electricity']['air']['nonres_lg'] = ['VAV PFP Boxes', 'Electricity', 'Electricity', 'Electricity'] # District Hot Water, Electric, forced air syts['DistrictHeating']['Electricity']['air']['res_small'] = ['PTAC', 'DistrictHeating', nil, 'Electricity'] syts['DistrictHeating']['Electricity']['air']['res_med'] = ['PTAC', 'DistrictHeating', nil, 'Electricity'] syts['DistrictHeating']['Electricity']['air']['nonres_small'] = ['PVAV Reheat', 'DistrictHeating', 'DistrictHeating', 'Electricity'] syts['DistrictHeating']['Electricity']['air']['nonres_med'] = ['PVAV Reheat', 'DistrictHeating', 'DistrictHeating', 'Electricity'] syts['DistrictHeating']['Electricity']['air']['nonres_lg'] = ['VAV Reheat', 'DistrictHeating', 'DistrictHeating', 'Electricity'] # Ambient Loop, Ambient Loop, forced air syts['DistrictAmbient']['DistrictAmbient']['air']['res_small'] = ['Water Source Heat Pumps with ERVs', 'HeatPump', nil, 'HeatPump'] syts['DistrictAmbient']['DistrictAmbient']['air']['res_med'] = ['Water Source Heat Pumps with DOAS', 'HeatPump', nil, 'HeatPump'] syts['DistrictAmbient']['DistrictAmbient']['air']['nonres_small'] = ['PVAV Reheat', 'HeatPump', 'HeatPump', 'HeatPump'] syts['DistrictAmbient']['DistrictAmbient']['air']['nonres_med'] = ['PVAV Reheat', 'HeatPump', 'HeatPump', 'HeatPump'] syts['DistrictAmbient']['DistrictAmbient']['air']['nonres_lg'] = ['VAV Reheat', 'HeatPump', 'HeatPump', 'HeatPump'] # Gas, District Chilled Water, forced air syts['NaturalGas']['DistrictCooling']['air']['res_small'] = ['PSZ-AC', 'NaturalGas', nil, 'DistrictCooling'] syts['NaturalGas']['DistrictCooling']['air']['res_med'] = ['PSZ-AC', 'NaturalGas', nil, 'DistrictCooling'] syts['NaturalGas']['DistrictCooling']['air']['nonres_small'] = ['PSZ-AC', 'NaturalGas', nil, 'DistrictCooling'] syts['NaturalGas']['DistrictCooling']['air']['nonres_med'] = ['PVAV Reheat', 'NaturalGas', 'NaturalGas', 'DistrictCooling'] syts['NaturalGas']['DistrictCooling']['air']['nonres_lg'] = ['VAV Reheat', 'NaturalGas', 'NaturalGas', 'DistrictCooling'] # Electric, District Chilled Water, forced air syts['Electricity']['DistrictCooling']['air']['res_small'] = ['PSZ-AC', 'Electricity', nil, 'DistrictCooling'] syts['Electricity']['DistrictCooling']['air']['res_med'] = ['PSZ-AC', 'Electricity', nil, 'DistrictCooling'] syts['Electricity']['DistrictCooling']['air']['nonres_small'] = ['PSZ-AC', 'Electricity', nil, 'DistrictCooling'] syts['Electricity']['DistrictCooling']['air']['nonres_med'] = ['PVAV Reheat', 'Electricity', 'Electricity', 'DistrictCooling'] syts['Electricity']['DistrictCooling']['air']['nonres_lg'] = ['VAV Reheat', 'Electricity', 'Electricity', 'DistrictCooling'] # District Hot Water, District Chilled Water, forced air syts['DistrictHeating']['DistrictCooling']['air']['res_small'] = ['PSZ-AC', 'DistrictHeating', nil, 'DistrictCooling'] syts['DistrictHeating']['DistrictCooling']['air']['res_med'] = ['PSZ-AC', 'DistrictHeating', nil, 'DistrictCooling'] syts['DistrictHeating']['DistrictCooling']['air']['nonres_small'] = ['PVAV Reheat', 'DistrictHeating', 'DistrictHeating', 'DistrictCooling'] syts['DistrictHeating']['DistrictCooling']['air']['nonres_med'] = ['PVAV Reheat', 'DistrictHeating', 'DistrictHeating', 'DistrictCooling'] syts['DistrictHeating']['DistrictCooling']['air']['nonres_lg'] = ['VAV Reheat', 'DistrictHeating', 'DistrictHeating', 'DistrictCooling'] ## Hydronic ## # Gas, Electric, hydronic syts['NaturalGas']['Electricity']['hydronic']['res_med'] = ['Fan Coil with DOAS', 'NaturalGas', nil, 'Electricity'] syts['NaturalGas']['Electricity']['hydronic']['nonres_small'] = ['Water Source Heat Pumps with DOAS', 'NaturalGas', nil, 'Electricity'] syts['NaturalGas']['Electricity']['hydronic']['nonres_med'] = ['Fan Coil with DOAS', 'NaturalGas', 'NaturalGas', 'Electricity'] syts['NaturalGas']['Electricity']['hydronic']['nonres_lg'] = ['Fan Coil with DOAS', 'NaturalGas', 'NaturalGas', 'Electricity'] # Electric, Electric, hydronic syts['Electricity']['Electricity']['hydronic']['res_small'] = ['Ground Source Heat Pumps with ERVs', 'Electricity', nil, 'Electricity'] syts['Electricity']['Electricity']['hydronic']['res_med'] = ['Ground Source Heat Pumps with DOAS', 'Electricity', nil, 'Electricity'] syts['Electricity']['Electricity']['hydronic']['nonres_small'] = ['Ground Source Heat Pumps with DOAS', 'Electricity', nil, 'Electricity'] syts['Electricity']['Electricity']['hydronic']['nonres_med'] = ['Ground Source Heat Pumps with DOAS', 'Electricity', 'Electricity', 'Electricity'] syts['Electricity']['Electricity']['hydronic']['nonres_lg'] = ['Ground Source Heat Pumps with DOAS', 'Electricity', 'Electricity', 'Electricity'] # District Hot Water, Electric, hydronic syts['DistrictHeating']['Electricity']['hydronic']['res_small'] = [] # TODO decide if there is anything reasonable for this syts['DistrictHeating']['Electricity']['hydronic']['res_med'] = ['Fan Coil with DOAS', 'DistrictHeating', nil, 'Electricity'] syts['DistrictHeating']['Electricity']['hydronic']['nonres_small'] = ['Water Source Heat Pumps with DOAS', 'DistrictHeating', 'DistrictHeating', 'Electricity'] syts['DistrictHeating']['Electricity']['hydronic']['nonres_med'] = ['Fan Coil with DOAS', 'DistrictHeating', 'DistrictHeating', 'Electricity'] syts['DistrictHeating']['Electricity']['hydronic']['nonres_lg'] = ['Fan Coil with DOAS', 'DistrictHeating', 'DistrictHeating', 'Electricity'] # Ambient Loop, Ambient Loop, hydronic syts['DistrictAmbient']['DistrictAmbient']['hydronic']['res_small'] = ['Water Source Heat Pumps with ERVs', 'HeatPump', nil, 'HeatPump'] syts['DistrictAmbient']['DistrictAmbient']['hydronic']['res_med'] = ['Water Source Heat Pumps with DOAS', 'HeatPump', nil, 'HeatPump'] syts['DistrictAmbient']['DistrictAmbient']['hydronic']['nonres_small'] = ['Water Source Heat Pumps with DOAS', 'HeatPump', 'HeatPump', 'HeatPump'] syts['DistrictAmbient']['DistrictAmbient']['hydronic']['nonres_med'] = ['Water Source Heat Pumps with DOAS', 'HeatPump', 'HeatPump', 'HeatPump'] syts['DistrictAmbient']['DistrictAmbient']['hydronic']['nonres_lg'] = ['Fan Coil with DOAS', 'DistrictHeating', nil, 'Electricity'] # TODO: is this reasonable? # Gas, District Chilled Water, hydronic syts['NaturalGas']['DistrictCooling']['hydronic']['res_med'] = ['Fan Coil with DOAS', 'NaturalGas', nil, 'DistrictCooling'] syts['NaturalGas']['DistrictCooling']['hydronic']['nonres_small'] = ['Fan Coil with DOAS', 'NaturalGas', nil, 'DistrictCooling'] syts['NaturalGas']['DistrictCooling']['hydronic']['nonres_med'] = ['Fan Coil with DOAS', 'NaturalGas', 'NaturalGas', 'DistrictCooling'] syts['NaturalGas']['DistrictCooling']['hydronic']['nonres_lg'] = ['Fan Coil with DOAS', 'NaturalGas', 'NaturalGas', 'DistrictCooling'] # Electric, District Chilled Water, hydronic syts['Electricity']['DistrictCooling']['hydronic']['res_med'] = ['Fan Coil with ERVs', 'Electricity', nil, 'DistrictCooling'] syts['Electricity']['DistrictCooling']['hydronic']['nonres_small'] = ['Fan Coil with DOAS', 'Electricity', nil, 'DistrictCooling'] syts['Electricity']['DistrictCooling']['hydronic']['nonres_med'] = ['Fan Coil with DOAS', 'Electricity', 'Electricity', 'DistrictCooling'] syts['Electricity']['DistrictCooling']['hydronic']['nonres_lg'] = ['Fan Coil with DOAS', 'Electricity', 'Electricity', 'DistrictCooling'] # District Hot Water, District Chilled Water, hydronic syts['DistrictHeating']['DistrictCooling']['hydronic']['res_small'] = ['Fan Coil with ERVs', 'DistrictHeating', nil, 'DistrictCooling'] syts['DistrictHeating']['DistrictCooling']['hydronic']['res_med'] = ['Fan Coil with DOAS', 'DistrictHeating', nil, 'DistrictCooling'] syts['DistrictHeating']['DistrictCooling']['hydronic']['nonres_small'] = ['Fan Coil with DOAS', 'DistrictHeating', 'DistrictHeating', 'DistrictCooling'] syts['DistrictHeating']['DistrictCooling']['hydronic']['nonres_med'] = ['Fan Coil with DOAS', 'DistrictHeating', 'DistrictHeating', 'DistrictCooling'] syts['DistrictHeating']['DistrictCooling']['hydronic']['nonres_lg'] = ['Fan Coil with DOAS', 'DistrictHeating', 'DistrictHeating', 'DistrictCooling'] # Get the system type system_type = syts[heating_source][cooling_source][delivery_type][size_category] if system_type.nil? || system_type.empty? system_type = [nil, nil, nil, nil] OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', "Could not determine system type for #{template}, #{area_type}, #{heating_source} heating, #{cooling_source} cooling, #{delivery_type} delivery, #{area_ft2.round} ft^2, #{num_stories} stories.") else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "System type is #{system_type[0]} for #{template}, #{area_type}, #{heating_source} heating, #{cooling_source} cooling, #{delivery_type} delivery, #{area_ft2.round} ft^2, #{num_stories} stories.") OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "--- #{system_type[1]} for main heating") unless system_type[1].nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "--- #{system_type[2]} for zone heat/reheat") unless system_type[2].nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "--- #{system_type[3]} for cooling") unless system_type[3].nil? end return system_type end |
#model_validate_standards_spacetypes_in_model(model) ⇒ Object
This method ensures that all spaces with spacetypes defined contain at least a standardSpaceType appropriate for the template. So, if any space with a space type defined does not have a Stnadard spacetype, or is undefined, an error will stop with information that the spacetype needs to be defined.
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 4074 def model_validate_standards_spacetypes_in_model(model) error_string = '' # populate search hash model.getSpaces.sort.each do |space| unless space.spaceType.empty? if space.spaceType.get.standardsSpaceType.empty? || space.spaceType.get.standardsBuildingType.empty? error_string << "Space: #{space.name} has SpaceType of #{space.spaceType.get.name} but the standardSpaceType or standardBuildingType is undefined. Please use an appropriate standardSpaceType for #{template}\n" next else search_criteria = { 'template' => template, 'building_type' => space.spaceType.get.standardsBuildingType.get, 'space_type' => space.spaceType.get.standardsSpaceType.get } # lookup space type properties space_type_properties = model_find_object(standards_data['space_types'], search_criteria) if space_type_properties.nil? error_string << "Could not find spacetype of criteria : #{search_criteria}. Please ensure you have a valid standardSpaceType and stantdardBuildingType defined.\n" space_type_properties = {} end end end end if error_string == '' return true else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Model', error_string) return false end end |
#model_walkin_freezer_latent_case_credit_curve(model) ⇒ Object
Should probably use the model_add_refrigeration_walkin
Determine the latent case credit curve to use for walkins. Defaults to values after 90.1-2007. and lookups from the spreadsheet instead of hard-coded values.
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.refrigeration.rb', line 151 def model_walkin_freezer_latent_case_credit_curve(model) latent_case_credit_curve_name = 'Single Shelf Horizontal Latent Energy Multiplier_After2004' return latent_case_credit_curve_name end |
#model_zones_with_occ_and_fuel_type(model, custom) ⇒ Array<Hash>
Categorize zones by occupancy type and fuel type, where the types depend on the standard.
with the keys ‘zone’, ‘type’ (occ type), ‘fuel’, and ‘area’
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# File 'lib/openstudio-standards/standards/Standards.Model.rb', line 309 def model_zones_with_occ_and_fuel_type(model, custom) zones = [] model.getThermalZones.sort.each do |zone| # Skip plenums if thermal_zone_plenum?(zone) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "Zone #{zone.name} is a plenum. It will not be assigned a baseline system.") next end # Skip unconditioned zones heated = thermal_zone_heated?(zone) cooled = thermal_zone_cooled?(zone) if !heated && !cooled OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Model', "Zone #{zone.name} is unconditioned. It will not be assigned a baseline system.") next end zn_hash = {} # The zone object zn_hash['zone'] = zone # Floor area zn_hash['area'] = zone.floorArea # Occupancy type zn_hash['occ'] = thermal_zone_occupancy_type(zone) # Fuel type zn_hash['fuel'] = thermal_zone_fossil_or_electric_type(zone, custom) zones << zn_hash end return zones end |
#planar_surface_apply_standard_construction(planar_surface, climate_zone, previous_construction_map = {}) ⇒ Hash
Align the standard construction enumerations in the
If construction properties can be found based on the template, the standards intended surface type, the standards construction type, the climate zone, and the occupancy type, create a construction that meets those properties and assign it to this surface.
90.1-2007, 90.1-2010, 90.1-2013
- template, climate_zone, intended_surface_type, standards_construction_type, occ_type
-
and the values are the constructions. If supplied, constructions will be pulled from this hash if already created to avoid creating duplicate constructions.
- template, climate_zone, intended_surface_type, standards_construction_type, occ_type
-
and the value is the newly created construction. This can be used to avoid creating duplicate constructions. spreadsheet with the enumerations in OpenStudio (follow CBECC-Com).
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# File 'lib/openstudio-standards/standards/Standards.PlanarSurface.rb', line 24 def planar_surface_apply_standard_construction(planar_surface, climate_zone, previous_construction_map = {}) # Skip surfaces not in a space return previous_construction_map if planar_surface.space.empty? space = planar_surface.space.get # Skip surfaces that don't have a construction return previous_construction_map if planar_surface.construction.empty? construction = planar_surface.construction.get # Determine if residential or nonresidential # based on the space type. occ_type = 'Nonresidential' if space_residential?(space) occ_type = 'Residential' end # Get the climate zone set climate_zone_set = model_find_climate_zone_set(planar_surface.model, climate_zone) # Get the intended surface type standards_info = construction.standardsInformation surf_type = standards_info.intendedSurfaceType if surf_type.empty? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.PlanarSurface', "Could not determine the intended surface type for #{planar_surface.name} from #{construction.name}. This surface will not have the standard applied.") return previous_construction_map end surf_type = surf_type.get # Get the standards type, which is based on different fields # if is intended for a window, a skylight, or something else. # Mapping is between standards-defined enumerations and the # enumerations available in OpenStudio. stds_type = nil # Windows if surf_type == 'ExteriorWindow' stds_type = standards_info.fenestrationFrameType if stds_type.is_initialized stds_type = stds_type.get case stds_type when 'Metal Framing', 'Metal Framing with Thermal Break' stds_type = 'Metal framing (all other)' when 'Non-Metal Framing' stds_type = 'Nonmetal framing (all)' else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.PlanarSurface', "The standards fenestration frame type #{stds_type} cannot be used on #{surf_type} in #{planar_surface.name}. This surface will not have the standard applied.") return previous_construction_map end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.PlanarSurface', "Could not determine the standards fenestration frame type for #{planar_surface.name} from #{construction.name}. This surface will not have the standard applied.") return previous_construction_map end # Skylights elsif surf_type == 'Skylight' stds_type = standards_info.fenestrationType if stds_type.is_initialized stds_type = stds_type.get case stds_type when 'Glass Skylight with Curb' stds_type = 'Glass with Curb' when 'Plastic Skylight with Curb' stds_type = 'Plastic with Curb' when 'Plastic Skylight without Curb', 'Glass Skylight without Curb' stds_type = 'Without Curb' else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.PlanarSurface', "The standards fenestration type #{stds_type} cannot be used on #{surf_type} in #{planar_surface.name}. This surface will not have the standard applied.") return previous_construction_map end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.PlanarSurface', "Could not determine the standards fenestration type for #{planar_surface.name} from #{construction.name}. This surface will not have the standard applied.") return previous_construction_map end # All other surface types else stds_type = standards_info.standardsConstructionType if stds_type.is_initialized stds_type = stds_type.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.PlanarSurface', "Could not determine the standards construction type for #{planar_surface.name}. This surface will not have the standard applied.") return previous_construction_map end end # Check if the construction type was already created. # If yes, use that construction. If no, make a new one. new_construction = nil type = [template, climate_zone, surf_type, stds_type, occ_type] if previous_construction_map[type] new_construction = previous_construction_map[type] else new_construction = model_find_and_add_construction(planar_surface.model, climate_zone_set, surf_type, stds_type, occ_type) if !new_construction == false previous_construction_map[type] = new_construction end end # Assign the new construction to the surface if new_construction planar_surface.setConstruction(new_construction) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.PlanarSurface', "Set the construction for #{planar_surface.name} to #{new_construction.name}.") else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.PlanarSurface', "Could not generate a standard construction for #{planar_surface.name}.") return previous_construction_map end return previous_construction_map end |
#plant_loop_apply_prm_baseline_chilled_water_pumping_type(plant_loop) ⇒ Object
Applies the chilled water pumping controls to the loop based on Appendix G.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 687 def plant_loop_apply_prm_baseline_chilled_water_pumping_type(plant_loop) # Determine the pumping type. minimum_cap_tons = 300 # Determine the capacity cap_w = plant_loop_total_cooling_capacity(plant_loop) cap_tons = OpenStudio.convert(cap_w, 'W', 'ton').get # Determine if it a district cooling system has_district_cooling = false plant_loop.supplyComponents.each do |sc| if sc.to_DistrictCooling.is_initialized has_district_cooling = true end end # Determine the primary and secondary pumping types pri_control_type = nil sec_control_type = nil if has_district_cooling pri_control_type = if cap_tons > minimum_cap_tons 'VSD No Reset' else 'Riding Curve' end else pri_control_type = 'Constant Flow' sec_control_type = if cap_tons > minimum_cap_tons 'VSD No Reset' else 'Riding Curve' end end # Report out the pumping type unless pri_control_type.nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{plant_loop.name}, primary pump type is #{pri_control_type}.") end unless sec_control_type.nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{plant_loop.name}, secondary pump type is #{sec_control_type}.") end # Modify all the primary pumps plant_loop.supplyComponents.each do |sc| if sc.to_PumpVariableSpeed.is_initialized pump = sc.to_PumpVariableSpeed.get pump_variable_speed_set_control_type(pump, pri_control_type) elsif sc.to_HeaderedPumpsVariableSpeed.is_initialized pump = sc.to_HeaderedPumpsVariableSpeed.get headered_pump_variable_speed_set_control_type(pump, control_type) end end # Modify all the secondary pumps plant_loop.demandComponents.each do |sc| if sc.to_PumpVariableSpeed.is_initialized pump = sc.to_PumpVariableSpeed.get pump_variable_speed_set_control_type(pump, sec_control_type) elsif sc.to_HeaderedPumpsVariableSpeed.is_initialized pump = sc.to_HeaderedPumpsVariableSpeed.get headered_pump_variable_speed_set_control_type(pump, control_type) end end return true end |
#plant_loop_apply_prm_baseline_chilled_water_temperatures(plant_loop) ⇒ Object
Applies the chilled water temperatures to the plant loop based on Appendix G.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 182 def plant_loop_apply_prm_baseline_chilled_water_temperatures(plant_loop) sizing_plant = plant_loop.sizingPlant # Loop properties # G3.1.3.8 - LWT 44 / EWT 56 chw_temp_f = 44 chw_delta_t_r = 12 min_temp_f = 34 max_temp_f = 200 # For water-cooled chillers this is the water temperature entering the condenser (e.g., leaving the cooling tower). ref_cond_wtr_temp_f = 85 chw_temp_c = OpenStudio.convert(chw_temp_f, 'F', 'C').get chw_delta_t_k = OpenStudio.convert(chw_delta_t_r, 'R', 'K').get min_temp_c = OpenStudio.convert(min_temp_f, 'F', 'C').get max_temp_c = OpenStudio.convert(max_temp_f, 'F', 'C').get ref_cond_wtr_temp_c = OpenStudio.convert(ref_cond_wtr_temp_f, 'F', 'C').get sizing_plant.setDesignLoopExitTemperature(chw_temp_c) sizing_plant.setLoopDesignTemperatureDifference(chw_delta_t_k) plant_loop.setMinimumLoopTemperature(min_temp_c) plant_loop.setMaximumLoopTemperature(max_temp_c) # ASHRAE Appendix G - G3.1.3.9 (for ASHRAE 90.1-2004, 2007 and 2010) # ChW reset: 44F at 80F and above, 54F at 60F and below plant_loop_enable_supply_water_temperature_reset(plant_loop) # Chiller properties plant_loop.supplyComponents.each do |sc| if sc.to_ChillerElectricEIR.is_initialized chiller = sc.to_ChillerElectricEIR.get chiller.setReferenceLeavingChilledWaterTemperature(chw_temp_c) chiller.setReferenceEnteringCondenserFluidTemperature(ref_cond_wtr_temp_c) end end return true end |
#plant_loop_apply_prm_baseline_condenser_water_pumping_type(plant_loop) ⇒ Object
Applies the condenser water pumping controls to the loop based on Appendix G.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 788 def plant_loop_apply_prm_baseline_condenser_water_pumping_type(plant_loop) # All condenser water loops are constant flow control_type = 'Constant Flow' # Report out the pumping type unless control_type.nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{plant_loop.name}, pump type is #{control_type}.") end # Modify all primary pumps plant_loop.supplyComponents.each do |sc| if sc.to_PumpVariableSpeed.is_initialized pump = sc.to_PumpVariableSpeed.get pump_variable_speed_set_control_type(pump, control_type) elsif sc.to_HeaderedPumpsVariableSpeed.is_initialized pump = sc.to_HeaderedPumpsVariableSpeed.get headered_pump_variable_speed_set_control_type(pump, control_type) end end return true end |
#plant_loop_apply_prm_baseline_condenser_water_temperatures(plant_loop) ⇒ Object
Applies the condenser water temperatures to the plant loop based on Appendix G.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 222 def plant_loop_apply_prm_baseline_condenser_water_temperatures(plant_loop) sizing_plant = plant_loop.sizingPlant # Much of the thought in this section # came from @jmarrec # Determine the design OATwb from the design days. # Per https://unmethours.com/question/16698/which-cooling-design-day-is-most-common-for-sizing-rooftop-units/ # the WB=>MDB day is used to size cooling towers. summer_oat_wbs_f = [] plant_loop.model.getDesignDays.sort.each do |dd| next unless dd.dayType == 'SummerDesignDay' next unless dd.name.get.to_s.include?('WB=>MDB') if dd.humidityIndicatingType == 'Wetbulb' summer_oat_wb_c = dd.humidityIndicatingConditionsAtMaximumDryBulb summer_oat_wbs_f << OpenStudio.convert(summer_oat_wb_c, 'C', 'F').get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.PlantLoop', "For #{dd.name}, humidity is specified as #{dd.humidityIndicatingType}; cannot determine Twb.") end end # Use the value from the design days or # 78F, the CTI rating condition, if no # design day information is available. design_oat_wb_f = nil if summer_oat_wbs_f.size.zero? design_oat_wb_f = 78 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, no design day OATwb conditions were found. CTI rating condition of 78F OATwb will be used for sizing cooling towers.") else # Take worst case condition design_oat_wb_f = summer_oat_wbs_f.max end # There is an EnergyPlus model limitation # that the design_oat_wb_f < 80F # for cooling towers ep_max_design_oat_wb_f = 80 if design_oat_wb_f > ep_max_design_oat_wb_f OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, reduced design OATwb from #{design_oat_wb_f} F to E+ model max input of #{ep_max_design_oat_wb_f} F.") design_oat_wb_f = ep_max_design_oat_wb_f end # Determine the design CW temperature, approach, and range design_oat_wb_c = OpenStudio.convert(design_oat_wb_f, 'F', 'C').get leaving_cw_t_c, approach_k, range_k = plant_loop_prm_baseline_condenser_water_temperatures(plant_loop, design_oat_wb_c) # Convert to IP units leaving_cw_t_f = OpenStudio.convert(leaving_cw_t_c, 'C', 'F').get approach_r = OpenStudio.convert(approach_k, 'K', 'R').get range_r = OpenStudio.convert(range_k, 'K', 'R').get # Report out design conditions OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, design OATwb = #{design_oat_wb_f.round(1)} F, approach = #{approach_r.round(1)} deltaF, range = #{range_r.round(1)} deltaF, leaving condenser water temperature = #{leaving_cw_t_f.round(1)} F.") # Set the CW sizing parameters sizing_plant.setDesignLoopExitTemperature(leaving_cw_t_c) sizing_plant.setLoopDesignTemperatureDifference(range_k) # Set Cooling Tower sizing parameters. # Only the variable speed cooling tower # in E+ allows you to set the design temperatures. # # Per the documentation # http://bigladdersoftware.com/epx/docs/8-4/input-output-reference/group-condenser-equipment.html#field-design-u-factor-times-area-value # for CoolingTowerSingleSpeed and CoolingTowerTwoSpeed # E+ uses the following values during sizing: # 95F entering water temp # 95F OATdb # 78F OATwb # range = loop design delta-T aka range (specified above) plant_loop.supplyComponents.each do |sc| if sc.to_CoolingTowerVariableSpeed.is_initialized ct = sc.to_CoolingTowerVariableSpeed.get # E+ has a minimum limit of 68F (20C) for this field. # Check against limit before attempting to set value. eplus_design_oat_wb_c_lim = 20 if design_oat_wb_c < eplus_design_oat_wb_c_lim OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, a design OATwb of 68F will be used for sizing the cooling towers because the actual design value is below the limit EnergyPlus accepts for this input.") design_oat_wb_c = eplus_design_oat_wb_c_lim end ct.setDesignInletAirWetBulbTemperature(design_oat_wb_c) ct.setDesignApproachTemperature(approach_k) ct.setDesignRangeTemperature(range_k) end end # Set the min and max CW temps # Typical design of min temp is really around 40F # (that's what basin heaters, when used, are sized for usually) min_temp_f = 34 max_temp_f = 200 min_temp_c = OpenStudio.convert(min_temp_f, 'F', 'C').get max_temp_c = OpenStudio.convert(max_temp_f, 'F', 'C').get plant_loop.setMinimumLoopTemperature(min_temp_c) plant_loop.setMaximumLoopTemperature(max_temp_c) # Cooling Tower operational controls # G3.1.3.11 - Tower shall be controlled to maintain a 70F # LCnWT where weather permits, # floating up to leaving water at design conditions. float_down_to_f = 70 float_down_to_c = OpenStudio.convert(float_down_to_f, 'F', 'C').get cw_t_stpt_manager = OpenStudio::Model::SetpointManagerFollowOutdoorAirTemperature.new(plant_loop.model) cw_t_stpt_manager.setName("CW Temp Follows OATwb w/ #{approach_r} plant_loop.deltaF approach min #{float_down_to_f.round(1)} F to max #{leaving_cw_t_f.round(1)}") cw_t_stpt_manager.setReferenceTemperatureType('OutdoorAirWetBulb') # At low design OATwb, it is possible to calculate # a maximum temperature below the minimum. In this case, # make the maximum and minimum the same. if leaving_cw_t_c < float_down_to_c OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, the maximum leaving temperature of #{leaving_cw_t_f.round(1)} F is below the minimum of #{float_down_to_f.round(1)} F. The maximum will be set to the same value as the minimum.") leaving_cw_t_c = float_down_to_c end cw_t_stpt_manager.setMaximumSetpointTemperature(leaving_cw_t_c) cw_t_stpt_manager.setMinimumSetpointTemperature(float_down_to_c) cw_t_stpt_manager.setOffsetTemperatureDifference(approach_k) cw_t_stpt_manager.addToNode(plant_loop.supplyOutletNode) return true end |
#plant_loop_apply_prm_baseline_hot_water_pumping_type(plant_loop) ⇒ Object
Applies the hot water pumping controls to the loop based on Appendix G.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 756 def plant_loop_apply_prm_baseline_hot_water_pumping_type(plant_loop) # Determine the minimum area to determine # pumping type. minimum_area_ft2 = 120_000 # Determine the area served area_served_m2 = plant_loop_total_floor_area_served(plant_loop) area_served_ft2 = OpenStudio.convert(area_served_m2, 'm^2', 'ft^2').get # Determine the pump type control_type = 'Riding Curve' if area_served_ft2 > minimum_area_ft2 control_type = 'VSD No Reset' end # Modify all the primary pumps plant_loop.supplyComponents.each do |sc| if sc.to_PumpVariableSpeed.is_initialized pump = sc.to_PumpVariableSpeed.get pump_variable_speed_set_control_type(pump, control_type) end end # Report out the pumping type unless control_type.nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{plant_loop.name}, pump type is #{control_type}.") end return true end |
#plant_loop_apply_prm_baseline_hot_water_temperatures(plant_loop) ⇒ Object
Applies the hot water temperatures to the plant loop based on Appendix G.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 150 def plant_loop_apply_prm_baseline_hot_water_temperatures(plant_loop) sizing_plant = plant_loop.sizingPlant # Loop properties # G3.1.3.3 - HW Supply at 180F, return at 130F hw_temp_f = 180 hw_delta_t_r = 50 min_temp_f = 50 hw_temp_c = OpenStudio.convert(hw_temp_f, 'F', 'C').get hw_delta_t_k = OpenStudio.convert(hw_delta_t_r, 'R', 'K').get min_temp_c = OpenStudio.convert(min_temp_f, 'F', 'C').get sizing_plant.setDesignLoopExitTemperature(hw_temp_c) sizing_plant.setLoopDesignTemperatureDifference(hw_delta_t_k) plant_loop.setMinimumLoopTemperature(min_temp_c) # ASHRAE Appendix G - G3.1.3.4 (for ASHRAE 90.1-2004, 2007 and 2010) # HW reset: 180F at 20F and below, 150F at 50F and above plant_loop_enable_supply_water_temperature_reset(plant_loop) # Boiler properties plant_loop.supplyComponents.each do |sc| if sc.to_BoilerHotWater.is_initialized boiler = sc.to_BoilerHotWater.get boiler.setDesignWaterOutletTemperature(hw_temp_c) end end return true end |
#plant_loop_apply_prm_baseline_pump_power(plant_loop) ⇒ Object
TODO: I think it makes more sense to sense the motor efficiency right there… But actually it’s completely irrelevant… you could set at 0.9 and just calculate the pressurise rise to have your 19 W/GPM or whatever
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 37 def plant_loop_apply_prm_baseline_pump_power(plant_loop) # Determine the pumping power per # flow based on loop type. pri_w_per_gpm = nil sec_w_per_gpm = nil sizing_plant = plant_loop.sizingPlant loop_type = sizing_plant.loopType case loop_type when 'Heating' has_district_heating = false plant_loop.supplyComponents.each do |sc| if sc.to_DistrictHeating.is_initialized has_district_heating = true end end pri_w_per_gpm = if has_district_heating # District HW 14.0 else # HW 19.0 end when 'Cooling' has_district_cooling = false plant_loop.supplyComponents.each do |sc| if sc.to_DistrictCooling.is_initialized has_district_cooling = true end end has_secondary_pump = false plant_loop.demandComponents.each do |sc| if sc.to_PumpConstantSpeed.is_initialized || sc.to_PumpVariableSpeed.is_initialized has_secondary_pump = true end end if has_district_cooling # District CHW pri_w_per_gpm = 16.0 elsif has_secondary_pump # Primary/secondary CHW pri_w_per_gpm = 9.0 sec_w_per_gpm = 13.0 else # Primary only CHW pri_w_per_gpm = 22.0 end when 'Condenser' # TODO: prm condenser loop pump power pri_w_per_gpm = 19.0 end # Modify all the primary pumps plant_loop.supplyComponents.each do |sc| if sc.to_PumpConstantSpeed.is_initialized pump = sc.to_PumpConstantSpeed.get pump_apply_prm_pressure_rise_and_motor_efficiency(pump, pri_w_per_gpm) elsif sc.to_PumpVariableSpeed.is_initialized pump = sc.to_PumpVariableSpeed.get pump_apply_prm_pressure_rise_and_motor_efficiency(pump, pri_w_per_gpm) elsif sc.to_HeaderedPumpsConstantSpeed.is_initialized pump = sc.to_HeaderedPumpsConstantSpeed.get pump_apply_prm_pressure_rise_and_motor_efficiency(pump, pri_w_per_gpm) elsif sc.to_HeaderedPumpsVariableSpeed.is_initialized pump = sc.to_HeaderedPumpsVariableSpeed.get pump_apply_prm_pressure_rise_and_motor_efficiency(pump, pri_w_per_gpm) end end # Modify all the secondary pumps plant_loop.demandComponents.each do |sc| if sc.to_PumpConstantSpeed.is_initialized pump = sc.to_PumpConstantSpeed.get pump_apply_prm_pressure_rise_and_motor_efficiency(pump, sec_w_per_gpm) elsif sc.to_PumpVariableSpeed.is_initialized pump = sc.to_PumpVariableSpeed.get pump_apply_prm_pressure_rise_and_motor_efficiency(pump, sec_w_per_gpm) elsif sc.to_HeaderedPumpsConstantSpeed.is_initialized pump = sc.to_HeaderedPumpsConstantSpeed.get pump_apply_prm_pressure_rise_and_motor_efficiency(pump, pri_w_per_gpm) elsif sc.to_HeaderedPumpsVariableSpeed.is_initialized pump = sc.to_HeaderedPumpsVariableSpeed.get pump_apply_prm_pressure_rise_and_motor_efficiency(pump, pri_w_per_gpm) end end return true end |
#plant_loop_apply_prm_baseline_pumping_type(plant_loop) ⇒ Object
Applies the pumping controls to the loop based on Appendix G.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 670 def plant_loop_apply_prm_baseline_pumping_type(plant_loop) sizing_plant = plant_loop.sizingPlant loop_type = sizing_plant.loopType case loop_type when 'Heating' plant_loop_apply_prm_baseline_hot_water_pumping_type(plant_loop) when 'Cooling' plant_loop_apply_prm_baseline_chilled_water_pumping_type(plant_loop) when 'Condenser' plant_loop_apply_prm_baseline_condenser_water_pumping_type(plant_loop) end return true end |
#plant_loop_apply_prm_baseline_temperatures(plant_loop) ⇒ TrueClass
Applies the temperatures to the plant loop based on Appendix G.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 134 def plant_loop_apply_prm_baseline_temperatures(plant_loop) sizing_plant = plant_loop.sizingPlant loop_type = sizing_plant.loopType case loop_type when 'Heating' plant_loop_apply_prm_baseline_hot_water_temperatures(plant_loop) when 'Cooling' plant_loop_apply_prm_baseline_chilled_water_temperatures(plant_loop) when 'Condenser' plant_loop_apply_prm_baseline_condenser_water_temperatures(plant_loop) end return true end |
#plant_loop_apply_prm_number_of_boilers(plant_loop) ⇒ Object
Splits the single boiler used for the initial sizing run into multiple separate boilers based on Appendix G.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 813 def plant_loop_apply_prm_number_of_boilers(plant_loop) # Skip non-heating plants return true unless plant_loop.sizingPlant.loopType == 'Heating' # Determine the minimum area to determine # number of boilers. minimum_area_ft2 = 15_000 # Determine the area served area_served_m2 = plant_loop_total_floor_area_served(plant_loop) area_served_ft2 = OpenStudio.convert(area_served_m2, 'm^2', 'ft^2').get # Do nothing if only one boiler is required return true if area_served_ft2 < minimum_area_ft2 # Get all existing boilers boilers = [] plant_loop.supplyComponents.each do |sc| if sc.to_BoilerHotWater.is_initialized boilers << sc.to_BoilerHotWater.get end end # Ensure there is only 1 boiler to start first_boiler = nil if boilers.size.zero? return true elsif boilers.size > 1 OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, found #{boilers.size}, cannot split up per performance rating method baseline requirements.") else first_boiler = boilers[0] end # Clone the existing boiler and create # a new branch for it second_boiler = first_boiler.clone(plant_loop.model) if second_boiler.to_BoilerHotWater.is_initialized second_boiler = second_boiler.to_BoilerHotWater.get else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, could not clone boiler #{first_boiler.name}, cannot apply the performance rating method number of boilers.") return false end plant_loop.addSupplyBranchForComponent(second_boiler) final_boilers = [first_boiler, second_boiler] OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, added a second boiler.") # Set the sizing factor for all boilers evenly and Rename the boilers sizing_factor = (1.0 / final_boilers.size).round(2) final_boilers.each_with_index do |boiler, i| boiler.setSizingFactor(sizing_factor) boiler.setName("#{first_boiler.name} #{i + 1} of #{final_boilers.size}") end # Set the equipment to stage sequentially plant_loop.setLoadDistributionScheme('SequentialLoad') return true end |
#plant_loop_apply_prm_number_of_chillers(plant_loop) ⇒ Object
Splits the single chiller used for the initial sizing run into multiple separate chillers based on Appendix G.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 874 def plant_loop_apply_prm_number_of_chillers(plant_loop) # Skip non-cooling plants return true unless plant_loop.sizingPlant.loopType == 'Cooling' # Determine the number and type of chillers num_chillers = nil chiller_cooling_type = nil chiller_compressor_type = nil # Determine the capacity of the loop cap_w = plant_loop_total_cooling_capacity(plant_loop) cap_tons = OpenStudio.convert(cap_w, 'W', 'ton').get if cap_tons <= 300 num_chillers = 1 chiller_cooling_type = 'WaterCooled' chiller_compressor_type = 'Rotary Screw' elsif cap_tons > 300 && cap_tons < 600 num_chillers = 2 chiller_cooling_type = 'WaterCooled' chiller_compressor_type = 'Rotary Screw' else # Max capacity of a single chiller max_cap_ton = 800.0 num_chillers = (cap_tons / max_cap_ton).floor + 1 # Must be at least 2 chillers num_chillers += 1 if num_chillers == 1 chiller_cooling_type = 'WaterCooled' chiller_compressor_type = 'Centrifugal' end # Get all existing chillers and pumps chillers = [] pumps = [] plant_loop.supplyComponents.each do |sc| if sc.to_ChillerElectricEIR.is_initialized chillers << sc.to_ChillerElectricEIR.get elsif sc.to_PumpConstantSpeed.is_initialized pumps << sc.to_PumpConstantSpeed.get elsif sc.to_PumpVariableSpeed.is_initialized pumps << sc.to_PumpVariableSpeed.get end end # Ensure there is only 1 chiller to start first_chiller = nil if chillers.size.zero? return true elsif chillers.size > 1 OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, found #{chillers.size} chillers, cannot split up per performance rating method baseline requirements.") else first_chiller = chillers[0] end # Ensure there is only 1 pump to start orig_pump = nil if pumps.size.zero? OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, found #{pumps.size} pumps. A loop must have at least one pump.") return false elsif pumps.size > 1 OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, found #{pumps.size} pumps, cannot split up per performance rating method baseline requirements.") return false else orig_pump = pumps[0] end # Determine the per-chiller capacity # and sizing factor per_chiller_sizing_factor = (1.0 / num_chillers).round(2) # This is unused per_chiller_cap_tons = cap_tons / num_chillers # Set the sizing factor and the chiller type: could do it on the first chiller before cloning it, but renaming warrants looping on chillers anyways # Add any new chillers final_chillers = [first_chiller] (num_chillers - 1).times do new_chiller = first_chiller.clone(plant_loop.model) if new_chiller.to_ChillerElectricEIR.is_initialized new_chiller = new_chiller.to_ChillerElectricEIR.get else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, could not clone chiller #{first_chiller.name}, cannot apply the performance rating method number of chillers.") return false end # Connect the new chiller to the same CHW loop # as the old chiller. plant_loop.addSupplyBranchForComponent(new_chiller) # Connect the new chiller to the same CW loop # as the old chiller, if it was water-cooled. cw_loop = first_chiller.secondaryPlantLoop if cw_loop.is_initialized cw_loop.get.addDemandBranchForComponent(new_chiller) end final_chillers << new_chiller end # If there is more than one cooling tower, # replace the original pump with a headered pump # of the same type and properties. if final_chillers.size > 1 num_pumps = final_chillers.size new_pump = nil if orig_pump.to_PumpConstantSpeed.is_initialized new_pump = OpenStudio::Model::HeaderedPumpsConstantSpeed.new(plant_loop.model) new_pump.setNumberofPumpsinBank(num_pumps) new_pump.setName("#{orig_pump.name} Bank of #{num_pumps}") new_pump.setRatedPumpHead(orig_pump.ratedPumpHead) new_pump.setMotorEfficiency(orig_pump.motorEfficiency) new_pump.setFractionofMotorInefficienciestoFluidStream(orig_pump.fractionofMotorInefficienciestoFluidStream) new_pump.setPumpControlType(orig_pump.pumpControlType) elsif orig_pump.to_PumpVariableSpeed.is_initialized new_pump = OpenStudio::Model::HeaderedPumpsVariableSpeed.new(plant_loop.model) new_pump.setNumberofPumpsinBank(num_pumps) new_pump.setName("#{orig_pump.name} Bank of #{num_pumps}") new_pump.setRatedPumpHead(orig_pump.ratedPumpHead) new_pump.setMotorEfficiency(orig_pump.motorEfficiency) new_pump.setFractionofMotorInefficienciestoFluidStream(orig_pump.fractionofMotorInefficienciestoFluidStream) new_pump.setPumpControlType(orig_pump.pumpControlType) new_pump.setCoefficient1ofthePartLoadPerformanceCurve(orig_pump.coefficient1ofthePartLoadPerformanceCurve) new_pump.setCoefficient2ofthePartLoadPerformanceCurve(orig_pump.coefficient2ofthePartLoadPerformanceCurve) new_pump.setCoefficient3ofthePartLoadPerformanceCurve(orig_pump.coefficient3ofthePartLoadPerformanceCurve) new_pump.setCoefficient4ofthePartLoadPerformanceCurve(orig_pump.coefficient4ofthePartLoadPerformanceCurve) end # Remove the old pump orig_pump.remove # Attach the new headered pumps new_pump.addToNode(plant_loop.supplyInletNode) end # Set the sizing factor and the chiller types final_chillers.each_with_index do |final_chiller, i| final_chiller.setName("#{template} #{chiller_cooling_type} #{chiller_compressor_type} Chiller #{i + 1} of #{final_chillers.size}") final_chiller.setSizingFactor(per_chiller_sizing_factor) final_chiller.setCondenserType(chiller_cooling_type) end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, there are #{final_chillers.size} #{chiller_cooling_type} #{chiller_compressor_type} chillers.") # Set the equipment to stage sequentially plant_loop.setLoadDistributionScheme('SequentialLoad') return true end |
#plant_loop_apply_prm_number_of_cooling_towers(plant_loop) ⇒ Object
Splits the single cooling tower used for the initial sizing run into multiple separate cooling towers based on Appendix G.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 1019 def plant_loop_apply_prm_number_of_cooling_towers(plant_loop) # Skip non-cooling plants return true unless plant_loop.sizingPlant.loopType == 'Condenser' # Determine the number of chillers # already in the model num_chillers = plant_loop.model.getChillerElectricEIRs.size # Get all existing cooling towers and pumps clg_twrs = [] pumps = [] plant_loop.supplyComponents.each do |sc| if sc.to_CoolingTowerSingleSpeed.is_initialized clg_twrs << sc.to_CoolingTowerSingleSpeed.get elsif sc.to_CoolingTowerTwoSpeed.is_initialized clg_twrs << sc.to_CoolingTowerTwoSpeed.get elsif sc.to_CoolingTowerVariableSpeed.is_initialized clg_twrs << sc.to_CoolingTowerVariableSpeed.get elsif sc.to_PumpConstantSpeed.is_initialized pumps << sc.to_PumpConstantSpeed.get elsif sc.to_PumpVariableSpeed.is_initialized pumps << sc.to_PumpVariableSpeed.get end end # Ensure there is only 1 cooling tower to start orig_twr = nil if clg_twrs.size.zero? return true elsif clg_twrs.size > 1 OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, found #{clg_twrs.size} cooling towers, cannot split up per performance rating method baseline requirements.") return false else orig_twr = clg_twrs[0] end # Ensure there is only 1 pump to start orig_pump = nil if pumps.size.zero? OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, found #{pumps.size} pumps. A loop must have at least one pump.") return false elsif pumps.size > 1 OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, found #{pumps.size} pumps, cannot split up per performance rating method baseline requirements.") return false else orig_pump = pumps[0] end # Determine the per-cooling_tower sizing factor clg_twr_sizing_factor = (1.0 / num_chillers).round(2) # Add a cooling tower for each chiller. # Add an accompanying CW pump for each cooling tower. final_twrs = [orig_twr] new_twr = nil (num_chillers - 1).times do if orig_twr.to_CoolingTowerSingleSpeed.is_initialized new_twr = orig_twr.clone(plant_loop.model) new_twr = new_twr.to_CoolingTowerSingleSpeed.get elsif orig_twr.to_CoolingTowerTwoSpeed.is_initialized new_twr = orig_twr.clone(plant_loop.model) new_twr = new_twr.to_CoolingTowerTwoSpeed.get elsif orig_twr.to_CoolingTowerVariableSpeed.is_initialized # TODO: remove workaround after resolving # https://github.com/NREL/OpenStudio/issues/2212 # Workaround is to create a new tower # and replicate all the properties of the first tower. new_twr = OpenStudio::Model::CoolingTowerVariableSpeed.new(plant_loop.model) new_twr.setName(orig_twr.name.get.to_s) new_twr.setDesignInletAirWetBulbTemperature(orig_twr.designInletAirWetBulbTemperature.get) new_twr.setDesignApproachTemperature(orig_twr.designApproachTemperature.get) new_twr.setDesignRangeTemperature(orig_twr.designRangeTemperature.get) new_twr.(orig_twr..get) if orig_twr.fanPowerRatioFunctionofAirFlowRateRatioCurve.is_initialized new_twr.setFanPowerRatioFunctionofAirFlowRateRatioCurve(orig_twr.fanPowerRatioFunctionofAirFlowRateRatioCurve.get) end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, could not clone cooling tower #{orig_twr.name}, cannot apply the performance rating method number of cooling towers.") return false end # Connect the new cooling tower to the CW loop plant_loop.addSupplyBranchForComponent(new_twr) new_twr_inlet = new_twr.inletModelObject.get.to_Node.get final_twrs << new_twr end # If there is more than one cooling tower, # replace the original pump with a headered pump # of the same type and properties. if final_twrs.size > 1 num_pumps = final_twrs.size new_pump = nil if orig_pump.to_PumpConstantSpeed.is_initialized new_pump = OpenStudio::Model::HeaderedPumpsConstantSpeed.new(plant_loop.model) new_pump.setNumberofPumpsinBank(num_pumps) new_pump.setName("#{orig_pump.name} Bank of #{num_pumps}") new_pump.setRatedPumpHead(orig_pump.ratedPumpHead) new_pump.setMotorEfficiency(orig_pump.motorEfficiency) new_pump.setFractionofMotorInefficienciestoFluidStream(orig_pump.fractionofMotorInefficienciestoFluidStream) new_pump.setPumpControlType(orig_pump.pumpControlType) elsif orig_pump.to_PumpVariableSpeed.is_initialized new_pump = OpenStudio::Model::HeaderedPumpsVariableSpeed.new(plant_loop.model) new_pump.setNumberofPumpsinBank(num_pumps) new_pump.setName("#{orig_pump.name} Bank of #{num_pumps}") new_pump.setRatedPumpHead(orig_pump.ratedPumpHead) new_pump.setMotorEfficiency(orig_pump.motorEfficiency) new_pump.setFractionofMotorInefficienciestoFluidStream(orig_pump.fractionofMotorInefficienciestoFluidStream) new_pump.setPumpControlType(orig_pump.pumpControlType) new_pump.setCoefficient1ofthePartLoadPerformanceCurve(orig_pump.coefficient1ofthePartLoadPerformanceCurve) new_pump.setCoefficient2ofthePartLoadPerformanceCurve(orig_pump.coefficient2ofthePartLoadPerformanceCurve) new_pump.setCoefficient3ofthePartLoadPerformanceCurve(orig_pump.coefficient3ofthePartLoadPerformanceCurve) new_pump.setCoefficient4ofthePartLoadPerformanceCurve(orig_pump.coefficient4ofthePartLoadPerformanceCurve) end # Remove the old pump orig_pump.remove # Attach the new headered pumps new_pump.addToNode(plant_loop.supplyInletNode) end # Set the sizing factors final_twrs.each_with_index do |final_cooling_tower, i| final_cooling_tower.setName("#{final_cooling_tower.name} #{i + 1} of #{final_twrs.size}") final_cooling_tower.setSizingFactor(clg_twr_sizing_factor) end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, there are #{final_twrs.size} cooling towers, one for each chiller.") # Set the equipment to stage sequentially plant_loop.setLoadDistributionScheme('SequentialLoad') end |
#plant_loop_apply_standard_controls(plant_loop, climate_zone) ⇒ Bool
Apply all standard required controls to the plantloop
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 8 def plant_loop_apply_standard_controls(plant_loop, climate_zone) # Supply water temperature reset plant_loop_enable_supply_water_temperature_reset(plant_loop) if plant_loop_supply_water_temperature_reset_required?(plant_loop) end |
#plant_loop_enable_supply_water_temperature_reset(plant_loop) ⇒ TrueClass
Enable reset of hot or chilled water temperature based on outdoor air temperature.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 416 def plant_loop_enable_supply_water_temperature_reset(plant_loop) # Get the current setpoint manager on the outlet node # and determine if already has temperature reset spms = plant_loop.supplyOutletNode.setpointManagers spms.each do |spm| if spm.to_SetpointManagerOutdoorAirReset.is_initialized OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}: supply water temperature reset is already enabled.") return false end end # Get the design water temperature sizing_plant = plant_loop.sizingPlant design_temp_c = sizing_plant.designLoopExitTemperature design_temp_f = OpenStudio.convert(design_temp_c, 'C', 'F').get loop_type = sizing_plant.loopType # Apply the reset, depending on the type of loop. case loop_type when 'Heating' # Hot water as-designed when cold outside hwt_at_lo_oat_f = design_temp_f hwt_at_lo_oat_c = OpenStudio.convert(hwt_at_lo_oat_f, 'F', 'C').get # 30F decrease when it's hot outside, # and therefore less heating capacity is likely required. decrease_f = 30.0 hwt_at_hi_oat_f = hwt_at_lo_oat_f - decrease_f hwt_at_hi_oat_c = OpenStudio.convert(hwt_at_hi_oat_f, 'F', 'C').get # Define the high and low outdoor air temperatures lo_oat_f = 20 lo_oat_c = OpenStudio.convert(lo_oat_f, 'F', 'C').get hi_oat_f = 50 hi_oat_c = OpenStudio.convert(hi_oat_f, 'F', 'C').get # Create a setpoint manager hwt_oa_reset = OpenStudio::Model::SetpointManagerOutdoorAirReset.new(plant_loop.model) hwt_oa_reset.setName("#{plant_loop.name} HW Temp Reset") hwt_oa_reset.setControlVariable('Temperature') hwt_oa_reset.setSetpointatOutdoorLowTemperature(hwt_at_lo_oat_c) hwt_oa_reset.setOutdoorLowTemperature(lo_oat_c) hwt_oa_reset.setSetpointatOutdoorHighTemperature(hwt_at_hi_oat_c) hwt_oa_reset.setOutdoorHighTemperature(hi_oat_c) hwt_oa_reset.addToNode(plant_loop.supplyOutletNode) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}: hot water temperature reset from #{hwt_at_lo_oat_f.round}F to #{hwt_at_hi_oat_f.round}F between outdoor air temps of #{lo_oat_f.round}F and #{hi_oat_f.round}F.") when 'Cooling' # Chilled water as-designed when hot outside chwt_at_hi_oat_f = design_temp_f chwt_at_hi_oat_c = OpenStudio.convert(chwt_at_hi_oat_f, 'F', 'C').get # 10F increase when it's cold outside, # and therefore less cooling capacity is likely required. increase_f = 10.0 chwt_at_lo_oat_f = chwt_at_hi_oat_f + increase_f chwt_at_lo_oat_c = OpenStudio.convert(chwt_at_lo_oat_f, 'F', 'C').get # Define the high and low outdoor air temperatures lo_oat_f = 60 lo_oat_c = OpenStudio.convert(lo_oat_f, 'F', 'C').get hi_oat_f = 80 hi_oat_c = OpenStudio.convert(hi_oat_f, 'F', 'C').get # Create a setpoint manager chwt_oa_reset = OpenStudio::Model::SetpointManagerOutdoorAirReset.new(plant_loop.model) chwt_oa_reset.setName("#{plant_loop.name} CHW Temp Reset") chwt_oa_reset.setControlVariable('Temperature') chwt_oa_reset.setSetpointatOutdoorLowTemperature(chwt_at_lo_oat_c) chwt_oa_reset.setOutdoorLowTemperature(lo_oat_c) chwt_oa_reset.setSetpointatOutdoorHighTemperature(chwt_at_hi_oat_c) chwt_oa_reset.setOutdoorHighTemperature(hi_oat_c) chwt_oa_reset.addToNode(plant_loop.supplyOutletNode) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}: chilled water temperature reset from #{chwt_at_hi_oat_f.round}F to #{chwt_at_lo_oat_f.round}F between outdoor air temps of #{hi_oat_f.round}F and #{lo_oat_f.round}F.") else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}: cannot enable supply water temperature reset for a #{loop_type} loop.") return false end return true end |
#plant_loop_find_maximum_loop_flow_rate(plant_loop) ⇒ Double
find maximum_loop_flow_rate
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 1204 def plant_loop_find_maximum_loop_flow_rate(plant_loop) # Get the maximum_loop_flow_rate maximum_loop_flow_rate = nil if plant_loop.maximumLoopFlowRate.is_initialized maximum_loop_flow_rate = plant_loop.maximumLoopFlowRate.get elsif plant_loop.autosizedMaximumLoopFlowRate.is_initialized maximum_loop_flow_rate = plant_loop.autosizedMaximumLoopFlowRate.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.PlantLoop', "For #{plant_loop.name} maximum loop flow rate is not available.") end return maximum_loop_flow_rate end |
#plant_loop_prm_baseline_condenser_water_temperatures(plant_loop, design_oat_wb_c) ⇒ Array<Double>
Determine the performance rating method specified design condenser water temperature, approach, and range
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 348 def plant_loop_prm_baseline_condenser_water_temperatures(plant_loop, design_oat_wb_c) design_oat_wb_f = OpenStudio.convert(design_oat_wb_c, 'C', 'F').get # G3.1.3.11 - CW supply temp = 85F or 10F approaching design wet bulb temperature, # whichever is lower. Design range = 10F # Design Temperature rise of 10F => Range: 10F range_r = 10 # Determine the leaving CW temp max_leaving_cw_t_f = 85 leaving_cw_t_10f_approach_f = design_oat_wb_f + 10 leaving_cw_t_f = [max_leaving_cw_t_f, leaving_cw_t_10f_approach_f].min # Calculate the approach approach_r = leaving_cw_t_f - design_oat_wb_f # Convert to SI units leaving_cw_t_c = OpenStudio.convert(leaving_cw_t_f, 'F', 'C').get approach_k = OpenStudio.convert(approach_r, 'R', 'K').get range_k = OpenStudio.convert(range_r, 'R', 'K').get return [leaving_cw_t_c, approach_k, range_k] end |
#plant_loop_supply_water_temperature_reset_required?(plant_loop) ⇒ Boolean
Determine if temperature reset is required. Required if heating or cooling capacity is greater than 300,000 Btu/hr.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 375 def plant_loop_supply_water_temperature_reset_required?(plant_loop) reset_required = false # Not required for service water heating systems if plant_loop_swh_loop?(plant_loop) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}: supply water temperature reset not required for service water heating systems.") return reset_required end # Not required for variable flow systems if plant_loop_variable_flow_system?(plant_loop) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}: supply water temperature reset not required for variable flow systems per 6.5.4.3 Exception b.") return reset_required end # Determine the capacity of the system heating_capacity_w = plant_loop_total_heating_capacity(plant_loop) cooling_capacity_w = plant_loop_total_cooling_capacity(plant_loop) heating_capacity_btu_per_hr = OpenStudio.convert(heating_capacity_w, 'W', 'Btu/hr').get cooling_capacity_btu_per_hr = OpenStudio.convert(cooling_capacity_w, 'W', 'Btu/hr').get # Compare against capacity minimum requirement min_cap_btu_per_hr = 300_000 if heating_capacity_btu_per_hr > min_cap_btu_per_hr OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}: supply water temperature reset is required because heating capacity of #{heating_capacity_btu_per_hr.round} Btu/hr exceeds the minimum threshold of #{min_cap_btu_per_hr.round} Btu/hr.") reset_required = true elsif cooling_capacity_btu_per_hr > min_cap_btu_per_hr OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}: supply water temperature reset is required because cooling capacity of #{cooling_capacity_btu_per_hr.round} Btu/hr exceeds the minimum threshold of #{min_cap_btu_per_hr.round} Btu/hr.") reset_required = true else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}: supply water temperature reset is not required because capacity is less than minimum of #{min_cap_btu_per_hr.round} Btu/hr.") end return reset_required end |
#plant_loop_swh_loop?(plant_loop) ⇒ Boolean
Determines if the loop is a Service Water Heating loop by checking if there is a WaterUseConnection on the demand side or a WaterHeaterMixed on the supply side
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 1222 def plant_loop_swh_loop?(plant_loop) serves_swh = false plant_loop.demandComponents.each do |comp| if comp.to_WaterUseConnections.is_initialized serves_swh = true break end end plant_loop.supplyComponents.each do |comp| if comp.to_WaterHeaterMixed.is_initialized serves_swh = true break end end # If there is a waterheater on the demand side, # check if the loop connected to that waterheater's # demand side is an swh loop itself plant_loop.demandComponents.each do |comp| if comp.to_WaterHeaterMixed.is_initialized comp = comp.to_WaterHeaterMixed.get if comp.plantLoop.is_initialized if plant_loop_swh_loop?(comp.plantLoop.get) serves_swh = true break end end end end return serves_swh end |
#plant_loop_swh_system_type(plant_loop) ⇒ Array<Array<String>, Bool, Double, Double>
Classifies the service water system and returns information about fuel types, whether it serves both heating and service water heating, the water storage volume, and the total heating capacity.
fuel types, combination_system (true/false), storage_capacity (m^3), plant_loop_total_heating_capacity(plant_loop) (W)
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 1261 def plant_loop_swh_system_type(plant_loop) combination_system = true storage_capacity = 0 primary_fuels = [] secondary_fuels = [] # @Todo: to work correctly, plant_loop_total_heating_capacity(plantloop) requires to have either hardsized capacities or a sizing run. primary_heating_capacity = plant_loop_total_heating_capacity(plant_loop) secondary_heating_capacity = 0 plant_loop.supplyComponents.each do |component| # Get the object type obj_type = component.iddObjectType.valueName.to_s case obj_type when 'OS_DistrictHeating' primary_fuels << 'DistrictHeating' combination_system = false when 'OS_HeatPump_WaterToWater_EquationFit_Heating' primary_fuels << 'Electricity' when 'OS_SolarCollector_FlatPlate_PhotovoltaicThermal' primary_fuels << 'SolarEnergy' when 'OS_SolarCollector_FlatPlate_Water' primary_fuels << 'SolarEnergy' when 'OS_SolarCollector_IntegralCollectorStorage' primary_fuels << 'SolarEnergy' when 'OS_WaterHeater_HeatPump' primary_fuels << 'Electricity' when 'OS_WaterHeater_Mixed' component = component.to_WaterHeaterMixed.get # Check it it's actually a heater, not just a storage tank if component.heaterMaximumCapacity.empty? || component.heaterMaximumCapacity.get != 0 # If it does, we add the heater Fuel Type primary_fuels << component.heaterFuelType # And in this case we'll reuse this object combination_system = false end # @Todo: not sure about whether it should be an elsif or not # Check the plant loop connection on the source side if component.secondaryPlantLoop.is_initialized source_plant_loop = component.secondaryPlantLoop.get secondary_fuels += plant_loop.model.plant_loop_heating_fuels(source_plant_loop) secondary_heating_capacity += plant_loop_total_heating_capacity(source_plant_loop) end # Storage capacity if component.tankVolume.is_initialized storage_capacity = component.tankVolume.get end when 'OS_WaterHeater_Stratified' component = component.to_WaterHeaterStratified.get # Check if the heater actually has a capacity (otherwise it's simply a Storage Tank) if component.heaterMaximumCapacity.empty? || component.heaterMaximumCapacity.get != 0 # If it does, we add the heater Fuel Type primary_fuels << component.heaterFuelType # And in this case we'll reuse this object combination_system = false end # @Todo: not sure about whether it should be an elsif or not # Check the plant loop connection on the source side if component.secondaryPlantLoop.is_initialized source_plant_loop = component.secondaryPlantLoop.get secondary_fuels += plant_loop.model.plant_loop_heating_fuels(source_plant_loop) secondary_heating_capacity += plant_loop_total_heating_capacity(source_plant_loop) end # Storage capacity if component.tankVolume.is_initialized storage_capacity = component.tankVolume.get end when 'OS_HeatExchanger_FluidToFluid' hx = component.to_HeatExchangerFluidToFluid.get cooling_hx_control_types = ['CoolingSetpointModulated', 'CoolingSetpointOnOff', 'CoolingDifferentialOnOff', 'CoolingSetpointOnOffWithComponentOverride'] cooling_hx_control_types.each(&:downcase!) if !cooling_hx_control_types.include?(hx.controlType.downcase) && hx.secondaryPlantLoop.is_initialized source_plant_loop = hx.secondaryPlantLoop.get secondary_fuels += plant_loop.model.plant_loop_heating_fuels(source_plant_loop) secondary_heating_capacity += plant_loop_total_heating_capacity(source_plant_loop) end when 'OS_Node', 'OS_Pump_ConstantSpeed', 'OS_Pump_VariableSpeed', 'OS_Connector_Splitter', 'OS_Connector_Mixer', 'OS_Pipe_Adiabatic' # To avoid extraneous debug messages end end # @Todo: decide how to handle primary and secondary stuff fuels = primary_fuels + secondary_fuels total_heating_capacity = primary_heating_capacity + secondary_heating_capacity # If the primary heating capacity is bigger than secondary, assume the secondary is just a backup and disregard it? # if primary_heating_capacity > secondary_heating_capacity # plant_loop_total_heating_capacity(plant_loop) = primary_heating_capacity # fuels = primary_fuels # end return fuels.uniq.sort, combination_system, storage_capacity, total_heating_capacity end |
#plant_loop_total_cooling_capacity(plant_loop) ⇒ Double, Fixnum
Get the total cooling capacity for the plant loop
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 509 def plant_loop_total_cooling_capacity(plant_loop) # Sum the cooling capacity for all cooling components # on the plant loop. total_cooling_capacity_w = 0 plant_loop.supplyComponents.each do |sc| # ChillerElectricEIR if sc.to_ChillerElectricEIR.is_initialized chiller = sc.to_ChillerElectricEIR.get if chiller.referenceCapacity.is_initialized total_cooling_capacity_w += chiller.referenceCapacity.get elsif chiller.autosizedReferenceCapacity.is_initialized total_cooling_capacity_w += chiller.autosizedReferenceCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirLoopHVAC', "For #{plant_loop.name} capacity of #{chiller.name} is not available, total cooling capacity of plant loop will be incorrect when applying standard.") end # DistrictCooling elsif sc.to_DistrictCooling.is_initialized dist_clg = sc.to_DistrictCooling.get if dist_clg.nominalCapacity.is_initialized total_cooling_capacity_w += dist_clg.nominalCapacity.get elsif dist_clg.autosizedNominalCapacity.is_initialized total_cooling_capacity_w += dist_clg.autosizedNominalCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.PlantLoop', "For #{plant_loop.name} capacity of DistrictCooling #{dist_clg.name} is not available, total heating capacity of plant loop will be incorrect when applying standard.") end end end total_cooling_capacity_tons = OpenStudio.convert(total_cooling_capacity_w, 'W', 'ton').get OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{plant_loop.name}, cooling capacity is #{total_cooling_capacity_tons.round} tons of refrigeration.") return total_cooling_capacity_w end |
#plant_loop_total_floor_area_served(plant_loop) ⇒ Object
Determine the total floor area served by this loop. If the loop serves a coil attached to an AirLoopHVAC, count the area of all zones served by that loop. If the loop serves coils inside of zone equipment, count the area of the zones containing the zone equipment.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 608 def plant_loop_total_floor_area_served(plant_loop) sizing_plant = plant_loop.sizingPlant loop_type = sizing_plant.loopType # Get all the coils served by this loop coils = [] case loop_type when 'Heating' plant_loop.demandComponents.each do |dc| if dc.to_CoilHeatingWater.is_initialized coils << dc.to_CoilHeatingWater.get end end when 'Cooling' plant_loop.demandComponents.each do |dc| if dc.to_CoilCoolingWater.is_initialized coils << dc.to_CoilCoolingWater.get end end else return 0.0 end # The coil can either be on an airloop (as a main heating coil) # in an HVAC Component (like a unitary system on an airloop), # or in a Zone HVAC Component (like a fan coil). zones_served = [] coils.each do |coil| if coil.airLoopHVAC.is_initialized air_loop = coil.airLoopHVAC.get zones_served += air_loop.thermalZones elsif coil.containingHVACComponent.is_initialized containing_comp = coil.containingHVACComponent.get if containing_comp.airLoopHVAC.is_initialized air_loop = containing_comp.airLoopHVAC.get zones_served += air_loop.thermalZones end elsif coil.containingZoneHVACComponent.is_initialized zone_hvac = coil.containingZoneHVACComponent.get if zone_hvac.thermalZone.is_initialized zones_served << zone_hvac.thermalZone.get end end end # Add up the area of all zones served. # Make sure to only add unique zones in # case the same zone is served by multiple # coils served by the same loop. For example, # a HW and Reheat area_served_m2 = 0.0 zones_served.uniq.each do |zone| area_served_m2 += zone.floorArea end area_served_ft2 = OpenStudio.convert(area_served_m2, 'm^2', 'ft^2').get OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirLoopHVAC', "For #{plant_loop.name}, serves #{area_served_ft2.round} ft^2.") return area_served_m2 end |
#plant_loop_total_heating_capacity(plant_loop) ⇒ Double, Object
Add district heating to plant loop heating capacity
Get the total heating capacity for the plant loop
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 550 def plant_loop_total_heating_capacity(plant_loop) # Sum the heating capacity for all heating components # on the plant loop. total_heating_capacity_w = 0 plant_loop.supplyComponents.each do |sc| # BoilerHotWater if sc.to_BoilerHotWater.is_initialized boiler = sc.to_BoilerHotWater.get if boiler.nominalCapacity.is_initialized total_heating_capacity_w += boiler.nominalCapacity.get elsif boiler.autosizedNominalCapacity.is_initialized total_heating_capacity_w += boiler.autosizedNominalCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.PlantLoop', "For #{plant_loop.name} capacity of Boiler:HotWater ' #{boiler.name} is not available, total heating capacity of plant loop will be incorrect when applying standard.") end # WaterHeater:Mixed elsif sc.to_WaterHeaterMixed.is_initialized water_heater = sc.to_WaterHeaterMixed.get if water_heater.heaterMaximumCapacity.is_initialized total_heating_capacity_w += water_heater.heaterMaximumCapacity.get elsif water_heater.autosizedHeaterMaximumCapacity.is_initialized total_heating_capacity_w += water_heater.autosizedHeaterMaximumCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.PlantLoop', "For #{plant_loop.name} capacity of WaterHeater:Mixed #{water_heater.name} is not available, total heating capacity of plant loop will be incorrect when applying standard.") end # WaterHeater:Stratified elsif sc.to_WaterHeaterStratified.is_initialized water_heater = sc.to_WaterHeaterStratified.get if water_heater.heater1Capacity.is_initialized total_heating_capacity_w += water_heater.heater1Capacity.get end if water_heater.heater2Capacity.is_initialized total_heating_capacity_w += water_heater.heater2Capacity.get end # DistrictHeating elsif sc.to_DistrictHeating.is_initialized dist_htg = sc.to_DistrictHeating.get if dist_htg.nominalCapacity.is_initialized total_heating_capacity_w += dist_htg.nominalCapacity.get elsif dist_htg.autosizedNominalCapacity.is_initialized total_heating_capacity_w += dist_htg.autosizedNominalCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.PlantLoop', "For #{plant_loop.name} capacity of DistrictHeating #{dist_htg.name} is not available, total heating capacity of plant loop will be incorrect when applying standard.") end end end # End loop on plant_loop.supplyComponents total_heating_capacity_kbtu_per_hr = OpenStudio.convert(total_heating_capacity_w, 'W', 'kBtu/hr').get OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.PlantLoop', "For #{plant_loop.name}, heating capacity is #{total_heating_capacity_kbtu_per_hr.round} kBtu/hr.") return total_heating_capacity_w end |
#plant_loop_total_rated_w_per_gpm(plant_loop) ⇒ Double
Determines the total rated watts per GPM of the loop
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 1155 def plant_loop_total_rated_w_per_gpm(plant_loop) sizing_plant = plant_loop.sizingPlant loop_type = sizing_plant.loopType # Supply W/GPM supply_w_per_gpm = 0 demand_w_per_gpm = 0 plant_loop.supplyComponents.each do |component| if component.to_PumpConstantSpeed.is_initialized pump = component.to_PumpConstantSpeed.get pump_rated_w_per_gpm = pump_rated_w_per_gpm(pump) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Pump', "'#{loop_type}' Loop #{plant_loop.name} - Primary (Supply) Constant Speed Pump '#{pump.name}' - pump_rated_w_per_gpm #{pump_rated_w_per_gpm} W/GPM") supply_w_per_gpm += pump_rated_w_per_gpm elsif component.to_PumpVariableSpeed.is_initialized pump = component.to_PumpVariableSpeed.get pump_rated_w_per_gpm = pump_rated_w_per_gpm(pump) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Pump', "'#{loop_type}' Loop #{plant_loop.name} - Primary (Supply) VSD Pump '#{pump.name}' - pump_rated_w_per_gpm #{pump_rated_w_per_gpm} W/GPM") supply_w_per_gpm += pump_rated_w_per_gpm end end # Determine if primary only or primary-secondary # IF there's a pump on the demand side it's primary-secondary demand_pumps = plant_loop.demandComponents('OS:Pump:VariableSpeed'.to_IddObjectType) + plant_loop.demandComponents('OS:Pump:ConstantSpeed'.to_IddObjectType) demand_pumps.each do |component| if component.to_PumpConstantSpeed.is_initialized pump = component.to_PumpConstantSpeed.get pump_rated_w_per_gpm = pump_rated_w_per_gpm(pump) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Pump', "'#{loop_type}' Loop #{plant_loop.name} - Secondary (Demand) Constant Speed Pump '#{pump.name}' - pump_rated_w_per_gpm #{pump_rated_w_per_gpm} W/GPM") demand_w_per_gpm += pump_rated_w_per_gpm elsif component.to_PumpVariableSpeed.is_initialized pump = component.to_PumpVariableSpeed.get pump_rated_w_per_gpm = pump_rated_w_per_gpm(pump) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Pump', "'#{loop_type}' Loop #{plant_loop.name} - Secondary (Demand) VSD Pump '#{pump.name}' - pump_rated_w_per_gpm #{pump_rated_w_per_gpm} W/GPM") demand_w_per_gpm += pump_rated_w_per_gpm end end total_rated_w_per_gpm = supply_w_per_gpm + demand_w_per_gpm OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Loop', "'#{loop_type}' Loop #{plant_loop.name} - Total #{total_rated_w_per_gpm} W/GPM - Supply #{supply_w_per_gpm} W/GPM - Demand #{demand_w_per_gpm} W/GPM") return total_rated_w_per_gpm end |
#plant_loop_variable_flow_system?(plant_loop) ⇒ Boolean
Determine if the plant loop is variable flow. Returns true if primary and/or secondary pumps are variable speed.
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# File 'lib/openstudio-standards/standards/Standards.PlantLoop.rb', line 15 def plant_loop_variable_flow_system?(plant_loop) variable_flow = false # Check all the primary pumps plant_loop.supplyComponents.each do |sc| if sc.to_PumpVariableSpeed.is_initialized variable_flow = true end end # Check all the secondary pumps plant_loop.demandComponents.each do |sc| if sc.to_PumpVariableSpeed.is_initialized variable_flow = true end end return variable_flow end |
#pump_variable_speed_set_control_type(pump_variable_speed, control_type) ⇒ Object
Set the pump curve coefficients based on the specified control type.
are Riding Curve, VSD No Reset, VSD DP Reset
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# File 'lib/openstudio-standards/standards/Standards.PumpVariableSpeed.rb', line 12 def pump_variable_speed_set_control_type(pump_variable_speed, control_type) # Determine the coefficients coeff_a = nil coeff_b = nil coeff_c = nil coeff_d = nil case control_type when 'Constant Flow' coeff_a = 0.0 coeff_b = 1.0 coeff_c = 0.0 coeff_d = 0.0 when 'Riding Curve' coeff_a = 0.0 coeff_b = 3.2485 coeff_c = -4.7443 coeff_d = 2.5294 when 'VSD No Reset' coeff_a = 0.0 coeff_b = 0.5726 coeff_c = -0.301 coeff_d = 0.7347 when 'VSD DP Reset' coeff_a = 0.0 coeff_b = 0.0205 coeff_c = 0.4101 coeff_d = 0.5753 else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.PumpVariableSpeed', "Pump control type '#{control_type}' not recognized, pump coefficients will not be changed.") return false end # Set the coefficients pump_variable_speed.setCoefficient1ofthePartLoadPerformanceCurve(coeff_a) pump_variable_speed.setCoefficient2ofthePartLoadPerformanceCurve(coeff_b) pump_variable_speed.setCoefficient3ofthePartLoadPerformanceCurve(coeff_c) pump_variable_speed.setCoefficient4ofthePartLoadPerformanceCurve(coeff_d) pump_variable_speed.setPumpControlType('Intermittent') # Append the control type to the pump name # self.setName("#{self.name} #{control_type}") return true end |
#safe_load_model(model_path_string) ⇒ Object
load a model into OS & version translates, exiting and erroring if a problem is found
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 5 def safe_load_model(model_path_string) model_path = OpenStudio::Path.new(model_path_string) if OpenStudio.exists(model_path) version_translator = OpenStudio::OSVersion::VersionTranslator.new model = version_translator.loadModel(model_path) if model.empty? OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Model', "Version translation failed for #{model_path_string}") return false else model = model.get end else OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Model', "#{model_path_string} couldn't be found") return false end return model end |
#safe_load_sql(sql_path_string) ⇒ Object
load a sql file, exiting and erroring if a problem is found
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 24 def safe_load_sql(sql_path_string) sql_path = OpenStudio::Path.new(sql_path_string) if OpenStudio.exists(sql_path) sql = OpenStudio::SqlFile.new(sql_path) else OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Model', "#{sql_path} couldn't be found") return false end return sql end |
#schedule_compact_annual_min_max_value(schedule_compact) ⇒ Object
Returns the min and max value for this schedule.
return [Hash] Hash has two keys, min and max.
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# File 'lib/openstudio-standards/standards/Standards.ScheduleCompact.rb', line 9 def schedule_compact_annual_min_max_value(schedule_compact) vals = [] prev_str = '' sch.extensibleGroups.each do |eg| if prev_str.include?('until') val = eg.getDouble(0) if val.is_initialized vals << eg.getDouble(0).get end end str = eg.getString(0) if str.is_initialized prev_str = str.get.downcase end end # Error if no values were found if vals.size.zero? OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.ScheduleCompact', "Could not find any value in #{schedule_compact.name} when determining min and max.") result = { 'min' => 999.9, 'max' => 999.9 } return result end result = { 'min' => vals.min, 'max' => vals.max } return result end |
#schedule_constant_annual_equivalent_full_load_hrs(schedule_constant) ⇒ Object
Returns the equivalent full load hours (EFLH) for this schedule. For example, an always-on fractional schedule (always 1.0, 24/7, 365) would return a value of 8760.
return [Double] The total number of full load hours for this schedule
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# File 'lib/openstudio-standards/standards/Standards.ScheduleConstant.rb', line 11 def schedule_constant_annual_equivalent_full_load_hrs(schedule_constant) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.ScheduleRuleset', "Calculating total annual EFLH for schedule: #{schedule_constant.name}") return annual_flh = schedule_constant.value * 8760 end |
#schedule_constant_annual_min_max_value(schedule_constant) ⇒ Object
Returns the min and max value for this schedule. It doesn’t evaluate design days only run-period conditions
return [Hash] Hash has two keys, min and max.
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# File 'lib/openstudio-standards/standards/Standards.ScheduleConstant.rb', line 22 def schedule_constant_annual_min_max_value(schedule_constant) result = { 'min' => schedule_constant.value, 'max' => schedule_constant.value } return result end |
#schedule_ruleset_annual_equivalent_full_load_hrs(schedule_ruleset) ⇒ Double
Returns the equivalent full load hours (EFLH) for this schedule. For example, an always-on fractional schedule (always 1.0, 24/7, 365) would return a value of 8760.
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# File 'lib/openstudio-standards/standards/Standards.ScheduleRuleset.rb', line 11 def schedule_ruleset_annual_equivalent_full_load_hrs(schedule_ruleset) # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", "Calculating total annual EFLH for schedule: #{self.name}") # Define the start and end date year_start_date = nil year_end_date = nil if schedule_ruleset.model.yearDescription.is_initialized year_description = schedule_ruleset.model.yearDescription.get year = year_description.assumedYear year_start_date = OpenStudio::Date.new(OpenStudio::MonthOfYear.new('January'), 1, year) year_end_date = OpenStudio::Date.new(OpenStudio::MonthOfYear.new('December'), 31, year) else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.ScheduleRuleset', 'WARNING: Year description is not specified; assuming 2009, the default year OS uses.') year_start_date = OpenStudio::Date.new(OpenStudio::MonthOfYear.new('January'), 1, 2009) year_end_date = OpenStudio::Date.new(OpenStudio::MonthOfYear.new('December'), 31, 2009) end # Get the ordered list of all the day schedules # that are used by this schedule ruleset day_schs = schedule_ruleset.getDaySchedules(year_start_date, year_end_date) # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", "***Day Schedules Used***") day_schs.uniq.each do |day_sch| # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", " #{day_sch.name.get}") end # Get a 365-value array of which schedule is used on each day of the year, day_schs_used_each_day = schedule_ruleset.getActiveRuleIndices(year_start_date, year_end_date) if !day_schs_used_each_day.length == 365 OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.ScheduleRuleset', "#{schedule_ruleset.name} does not have 365 daily schedules accounted for, cannot accurately calculate annual EFLH.") return 0 end # Create a map that shows how many days each schedule is used day_sch_freq = day_schs_used_each_day.group_by { |n| n } # Build a hash that maps schedule day index to schedule day schedule_index_to_day = {} day_schs.each_with_index do |day_sch, i| schedule_index_to_day[day_schs_used_each_day[i]] = day_sch end # Loop through each of the schedules that is used, figure out the # full load hours for that day, then multiply this by the number # of days that day schedule applies and add this to the total. annual_flh = 0 max_daily_flh = 0 default_day_sch = schedule_ruleset.defaultDaySchedule day_sch_freq.each do |freq| # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", freq.inspect # exit # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", "Schedule Index = #{freq[0]}" sch_index = freq[0] number_of_days_sch_used = freq[1].size # Get the day schedule at this index day_sch = nil day_sch = if sch_index == -1 # If index = -1, this day uses the default day schedule (not a rule) default_day_sch else schedule_index_to_day[sch_index] end # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", "Calculating EFLH for: #{day_sch.name}") # Determine the full load hours for just one day daily_flh = 0 values = day_sch.values times = day_sch.times previous_time_decimal = 0 times.each_with_index do |time, i| time_decimal = (time.days * 24.0) + time.hours + (time.minutes / 60.0) + (time.seconds / 3600.0) duration_of_value = time_decimal - previous_time_decimal # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", " Value of #{values[i]} for #{duration_of_value} hours") daily_flh += values[i] * duration_of_value previous_time_decimal = time_decimal end # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", " #{daily_flh.round(2)} EFLH per day") # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", " Used #{number_of_days_sch_used} days per year") # Multiply the daily EFLH by the number # of days this schedule is used per year # and add this to the overall total annual_flh += daily_flh * number_of_days_sch_used end # Warn if the max daily EFLH is more than 24, # which would indicate that this isn't a # fractional schedule. if max_daily_flh > 24 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ScheduleRuleset', "#{schedule_ruleset.name} has more than 24 EFLH in one day schedule, indicating that it is not a fractional schedule.") end return annual_flh end |
#schedule_ruleset_annual_hours_above_value(schedule_ruleset, lower_limit) ⇒ Double
Returns the total number of hours where the schedule is greater than the specified value.
will not be counted. this schedule is above the specified value.
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# File 'lib/openstudio-standards/standards/Standards.ScheduleRuleset.rb', line 152 def schedule_ruleset_annual_hours_above_value(schedule_ruleset, lower_limit) # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", "Calculating total annual hours above #{lower_limit} for schedule: #{self.name}") # Define the start and end date year_start_date = nil year_end_date = nil if schedule_ruleset.model.yearDescription.is_initialized year_description = schedule_ruleset.model.yearDescription.get year = year_description.assumedYear year_start_date = OpenStudio::Date.new(OpenStudio::MonthOfYear.new('January'), 1, year) year_end_date = OpenStudio::Date.new(OpenStudio::MonthOfYear.new('December'), 31, year) else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.ScheduleRuleset', 'WARNING: Year description is not specified; assuming 2009, the default year OS uses.') year_start_date = OpenStudio::Date.new(OpenStudio::MonthOfYear.new('January'), 1, 2009) year_end_date = OpenStudio::Date.new(OpenStudio::MonthOfYear.new('December'), 31, 2009) end # Get the ordered list of all the day schedules # that are used by this schedule ruleset day_schs = schedule_ruleset.getDaySchedules(year_start_date, year_end_date) # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", "***Day Schedules Used***") day_schs.uniq.each do |day_sch| # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", " #{day_sch.name.get}") end # Get a 365-value array of which schedule is used on each day of the year, day_schs_used_each_day = schedule_ruleset.getActiveRuleIndices(year_start_date, year_end_date) if !day_schs_used_each_day.length == 365 OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.ScheduleRuleset', "#{schedule_ruleset.name} does not have 365 daily schedules accounted for, cannot accurately calculate annual EFLH.") return 0 end # Create a map that shows how many days each schedule is used day_sch_freq = day_schs_used_each_day.group_by { |n| n } # Build a hash that maps schedule day index to schedule day schedule_index_to_day = {} day_schs.each_with_index do |day_sch, i| schedule_index_to_day[day_schs_used_each_day[i]] = day_sch end # Loop through each of the schedules that is used, figure out the # hours for that day, then multiply this by the number # of days that day schedule applies and add this to the total. annual_hrs = 0 default_day_sch = schedule_ruleset.defaultDaySchedule day_sch_freq.each do |freq| # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", freq.inspect # exit # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", "Schedule Index = #{freq[0]}" sch_index = freq[0] number_of_days_sch_used = freq[1].size # Get the day schedule at this index day_sch = nil day_sch = if sch_index == -1 # If index = -1, this day uses the default day schedule (not a rule) default_day_sch else schedule_index_to_day[sch_index] end # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", "Calculating hours above #{lower_limit} for: #{day_sch.name}") # Determine the hours for just one day daily_hrs = 0 values = day_sch.values times = day_sch.times previous_time_decimal = 0 times.each_with_index do |time, i| time_decimal = (time.days * 24.0) + time.hours + (time.minutes / 60.0) + (time.seconds / 3600.0) duration_of_value = time_decimal - previous_time_decimal # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", " Value of #{values[i]} for #{duration_of_value} hours") daily_hrs += values[i] * duration_of_value previous_time_decimal = time_decimal end # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", " #{daily_hrs.round(2)} hours above #{lower_limit} per day") # OpenStudio::logFree(OpenStudio::Debug, "openstudio.standards.ScheduleRuleset", " Used #{number_of_days_sch_used} days per year") # Multiply the daily hours by the number # of days this schedule is used per year # and add this to the overall total annual_hrs += daily_hrs * number_of_days_sch_used end return annual_hrs end |
#schedule_ruleset_annual_min_max_value(schedule_ruleset) ⇒ Hash
Returns the min and max value for this schedule. It doesn’t evaluate design days only run-period conditions
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# File 'lib/openstudio-standards/standards/Standards.ScheduleRuleset.rb', line 113 def schedule_ruleset_annual_min_max_value(schedule_ruleset) # gather profiles profiles = [] profiles << schedule_ruleset.defaultDaySchedule rules = schedule_ruleset.scheduleRules rules.each do |rule| profiles << rule.daySchedule end # test profiles min = nil max = nil profiles.each do |profile| profile.values.each do |value| if min.nil? min = value else min = value if min > value end if max.nil? max = value else max = value if max < value end end end result = { 'min' => min, 'max' => max } return result end |
#seer_to_cop_cooling_no_fan(seer) ⇒ Double
Convert from SEER to COP (no fan) for cooling coils
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 132 def seer_to_cop_cooling_no_fan(seer) cop = -0.0076 * seer * seer + 0.3796 * seer return cop end |
#space_add_daylighting_controls(space, remove_existing_controls, draw_daylight_areas_for_debugging = false) ⇒ Hash
add a list of valid choices for template argument
add exception for retail spaces
add exception 2 for skylights with VT < 0.4
add exception 3 for CZ 8 where lighting < 200W
stop skipping non-vertical walls
stop skipping non-horizontal roofs
Determine the illuminance setpoint for the controls based on space type
rotate sensor to face window (only needed for glare calcs)
This method is super complicated because of all the polygon/geometry math required. and therefore may not return perfect results. However, it works well in most tested situations. When it fails, it will log warnings/errors for users to see.
Adds daylighting controls (sidelighting and toplighting) per the template
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 795 def space_add_daylighting_controls(space, remove_existing_controls, draw_daylight_areas_for_debugging = false) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "******For #{space.name}, adding daylight controls.") # Check for existing daylighting controls # and remove if specified in the input existing_daylighting_controls = space.daylightingControls unless existing_daylighting_controls.empty? if remove_existing_controls existing_daylighting_controls.each(&:remove) OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Space', "For #{space.name}, removed #{existing_daylighting_controls.size} existing daylight controls before adding new controls.") else OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Space', "For #{space.name}, daylight controls were already present, no additional controls added.") return false end end # Skip this space if it has no exterior windows or skylights ext_fen_area_m2 = 0 space.surfaces.each do |surface| next unless surface.outsideBoundaryCondition == 'Outdoors' surface.subSurfaces.each do |sub_surface| next unless sub_surface.subSurfaceType == 'FixedWindow' || sub_surface.subSurfaceType == 'OperableWindow' || sub_surface.subSurfaceType == 'Skylight' || sub_surface.subSurfaceType == 'GlassDoor' ext_fen_area_m2 += sub_surface.netArea end end if ext_fen_area_m2.zero? OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Space', "For #{space.name}, daylighting control not applicable because no exterior fenestration is present.") return false end areas = nil # Get the area of the space space_area_m2 = space.floorArea # Get the LPD of the space space_lpd_w_per_m2 = space.lightingPowerPerFloorArea # Get the daylighting areas areas = space_daylighted_areas(space, draw_daylight_areas_for_debugging) # Determine the type of daylighting controls required req_top_ctrl, req_pri_ctrl, req_sec_ctrl = space_daylighting_control_required?(space, areas) # Stop here if no controls are required if !req_top_ctrl && !req_pri_ctrl && !req_sec_ctrl return false end # Output the daylight control requirements OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "For #{space.name}, toplighting control required = #{req_top_ctrl}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "For #{space.name}, primary sidelighting control required = #{req_pri_ctrl}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "For #{space.name}, secondary sidelighting control required = #{req_sec_ctrl}") # Stop here if no lighting controls are required. # Do not put daylighting control points into the space. if !req_top_ctrl && !req_pri_ctrl && !req_sec_ctrl OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "For #{space.name}, no daylighting control is required.") return false end # Record a floor in the space for later use floor_surface = nil space.surfaces.sort.each do |surface| if surface.surfaceType == 'Floor' floor_surface = surface break end end # Find all exterior windows/skylights in the space and record their azimuths and areas windows = {} skylights = {} space.surfaces.sort.each do |surface| next unless surface.outsideBoundaryCondition == 'Outdoors' && (surface.surfaceType == 'Wall' || surface.surfaceType == 'RoofCeiling') # Skip non-vertical walls and non-horizontal roofs straight_upward = OpenStudio::Vector3d.new(0, 0, 1) surface_normal = surface.outwardNormal if surface.surfaceType == 'Wall' # TODO: stop skipping non-vertical walls unless surface_normal.z.abs < 0.001 unless surface.subSurfaces.empty? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "Cannot currently handle non-vertical walls; skipping windows on #{surface.name} in #{space.name} for daylight sensor positioning.") next end end elsif surface.surfaceType == 'RoofCeiling' # TODO: stop skipping non-horizontal roofs unless surface_normal.to_s == straight_upward.to_s unless surface.subSurfaces.empty? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "Cannot currently handle non-horizontal roofs; skipping skylights on #{surface.name} in #{space.name} for daylight sensor positioning.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "---Surface #{surface.name} has outward normal of #{surface_normal.to_s.gsub(/\[|\]/, '|')}; up is #{straight_upward.to_s.gsub(/\[|\]/, '|')}.") next end end end # Find the azimuth of the facade facade = nil group = surface.planarSurfaceGroup if group.is_initialized group = group.get site_transformation = group.buildingTransformation site_vertices = site_transformation * surface.vertices site_outward_normal = OpenStudio.getOutwardNormal(site_vertices) if site_outward_normal.empty? OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Space', "Could not compute outward normal for #{surface.name.get}") next end site_outward_normal = site_outward_normal.get north = OpenStudio::Vector3d.new(0.0, 1.0, 0.0) azimuth = if site_outward_normal.x < 0.0 360.0 - OpenStudio.radToDeg(OpenStudio.getAngle(site_outward_normal, north)) else OpenStudio.radToDeg(OpenStudio.getAngle(site_outward_normal, north)) end else # The surface is not in a group; should not hit, since # called from Space.surfaces next end # TODO: modify to work for buildings in the southern hemisphere? if azimuth >= 315.0 || azimuth < 45.0 facade = '4-North' elsif azimuth >= 45.0 && azimuth < 135.0 facade = '3-East' elsif azimuth >= 135.0 && azimuth < 225.0 facade = '1-South' elsif azimuth >= 225.0 && azimuth < 315.0 facade = '2-West' end # Label the facade as "Up" if it is a skylight if surface_normal.to_s == straight_upward.to_s facade = '0-Up' end # Loop through all subsurfaces and surface.subSurfaces.sort.each do |sub_surface| next unless sub_surface.outsideBoundaryCondition == 'Outdoors' && (sub_surface.subSurfaceType == 'FixedWindow' || sub_surface.subSurfaceType == 'OperableWindow' || sub_surface.subSurfaceType == 'Skylight') # Find the area net_area_m2 = sub_surface.netArea # Find the head height and sill height of the window vertex_heights_above_floor = [] sub_surface.vertices.each do |vertex| vertex_on_floorplane = floor_surface.plane.project(vertex) vertex_heights_above_floor << (vertex - vertex_on_floorplane).length end head_height_m = vertex_heights_above_floor.max # OpenStudio::logFree(OpenStudio::Info, "openstudio.model.Space", "---head height = #{head_height_m}m, sill height = #{sill_height_m}m") # Log the window properties to use when creating daylight sensors properties = { facade: facade, area_m2: net_area_m2, handle: sub_surface.handle, head_height_m: head_height_m, name: sub_surface.name.get.to_s } if facade == '0-Up' skylights[sub_surface] = properties else windows[sub_surface] = properties end end # next sub-surface end # next surface # Determine the illuminance setpoint for the controls based on space type daylight_stpt_lux = 375 # find the specific space_type properties space_type = space.spaceType if space_type.empty? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Space', "Space #{space_type} is an unknown space type, assuming #{daylight_stpt_lux} Lux daylight setpoint") else space_type = space_type.get standards_building_type = if space_type.standardsBuildingType.is_initialized space_type.standardsBuildingType.get end standards_space_type = if space_type.standardsSpaceType.is_initialized space_type.standardsSpaceType.get end # use the building type (standards_building_type) and space type (standards_space_type) # as well as template to locate the space type data search_criteria = { 'template' => template, 'building_type' => standards_building_type, 'space_type' => standards_space_type } data = model_find_object(standards_data['space_types'], search_criteria) if data.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Space', "No data available for #{space_type.name}: #{standards_space_type} of #{standards_building_type} at #{template}, assuming a #{daylight_stpt_lux} Lux daylight setpoint!") else # Read the illuminance setpoint value # If 'na', daylighting is not appropriate for this space type for some reason daylight_stpt_lux = data['target_illuminance_setpoint'] if daylight_stpt_lux == 'na' OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Space', "For #{space.name}: daylighting is not appropriate for #{template} #{standards_building_type} #{standards_space_type}.") return true end # If a setpoint is specified, use that. Otherwise use a default. daylight_stpt_lux = daylight_stpt_lux.to_f if daylight_stpt_lux.zero? daylight_stpt_lux = 375 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Space', "For #{space.name}: no specific illuminance setpoint defined for #{template} #{standards_building_type} #{standards_space_type}, assuming #{daylight_stpt_lux} Lux.") else OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Space', "For #{space.name}: illuminance setpoint = #{daylight_stpt_lux} Lux") end # for the office prototypes where core and perimeter zoning is used, # there are additional assumptions about how much of the daylit area can be used. if standards_building_type == 'Office' && standards_space_type.include?('WholeBuilding') psa_nongeo_frac = data['psa_nongeometry_fraction'].to_f ssa_nongeo_frac = data['ssa_nongeometry_fraction'].to_f OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Space', "For #{space.name}: assuming only #{(psa_nongeo_frac * 100).round}% of the primary sidelit area is daylightable based on typical design practice.") OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Space', "For #{space.name}: assuming only #{(ssa_nongeo_frac * 100).round}% of the secondary sidelit area is daylightable based on typical design practice.") end end end # Get the zone that the space is in zone = space.thermalZone if zone.empty? OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Space', "Space #{name.get} has no thermal zone") else zone = zone.get end # Sort by priority; first by facade, then by area, # then by name to ensure deterministic in case identical in other ways sorted_windows = windows.sort_by { |_window, vals| [vals[:facade], vals[:area], vals[:name]] } sorted_skylights = skylights.sort_by { |_skylight, vals| [vals[:facade], vals[:area], vals[:name]] } # Report out the sorted skylights for debugging OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "For #{space.name}, Skylights:") sorted_skylights.each do |sky, p| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "---#{sky.name} #{p[:facade]}, area = #{p[:area_m2].round(2)} m^2") end # Report out the sorted windows for debugging OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "For #{space.name}, Windows:") sorted_windows.each do |win, p| OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "---#{win.name} #{p[:facade]}, area = #{p[:area_m2].round(2)} m^2") end # Determine the sensor fractions and the attached windows sensor_1_frac, sensor_2_frac, sensor_1_window, sensor_2_window = space_daylighting_fractions_and_windows(space, areas, sorted_windows, sorted_skylights, req_top_ctrl, req_pri_ctrl, req_sec_ctrl) # Further adjust the sensor controlled fraction for the three # office prototypes based on assumptions about geometry that is not explicitly # defined in the model. if standards_building_type == 'Office' && standards_space_type.include?('WholeBuilding') sensor_1_frac *= psa_nongeo_frac unless psa_nongeo_frac.nil? sensor_2_frac *= ssa_nongeo_frac unless ssa_nongeo_frac.nil? end # Place the sensors and set control fractions # get the zone that the space is in zone = space.thermalZone if zone.empty? OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Space', "Space #{space.name}, cannot determine daylighted areas.") return false else zone = space.thermalZone.get end # Ensure that total controlled fraction # is never set above 1 (100%) sensor_1_frac = sensor_1_frac.round(3) sensor_2_frac = sensor_2_frac.round(3) if sensor_1_frac >= 1.0 sensor_1_frac = 1.0 - 0.001 end if sensor_1_frac + sensor_2_frac >= 1.0 # Lower sensor_2_frac so that the total # is just slightly lower than 1.0 sensor_2_frac = 1.0 - sensor_1_frac - 0.001 end # Sensors if sensor_1_frac > 0.0 OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Space', "For #{space.name}: sensor 1 controls #{(sensor_1_frac * 100).round}% of the zone lighting.") end if sensor_2_frac > 0.0 OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Space', "For #{space.name}: sensor 2 controls #{(sensor_2_frac * 100).round}% of the zone lighting.") end # First sensor if sensor_1_window # OpenStudio::logFree(OpenStudio::Info, "openstudio.model.Space", "For #{self.name}, calculating daylighted areas.") # runner.registerInfo("Daylight sensor 1 inside of #{sensor_1_frac.name}") sensor_1 = OpenStudio::Model::DaylightingControl.new(space.model) sensor_1.setName("#{space.name} Daylt Sensor 1") sensor_1.setSpace(space) sensor_1.setIlluminanceSetpoint(daylight_stpt_lux) sensor_1.setLightingControlType('Stepped') sensor_1.setNumberofSteppedControlSteps(3) # all sensors 3-step per design sensor_1.setMinimumInputPowerFractionforContinuousDimmingControl(0.3) sensor_1.setMinimumLightOutputFractionforContinuousDimmingControl(0.2) sensor_1.setProbabilityLightingwillbeResetWhenNeededinManualSteppedControl(1.0) sensor_1.setMaximumAllowableDiscomfortGlareIndex(22.0) # Place sensor depending on skylight or window sensor_vertex = nil if sensor_1_window[1][:facade] == '0-Up' sub_surface = sensor_1_window[0] outward_normal = sub_surface.outwardNormal centroid = OpenStudio.getCentroid(sub_surface.vertices).get ht_above_flr = OpenStudio.convert(2.5, 'ft', 'm').get outward_normal.setLength(sensor_1_window[1][:head_height_m] - ht_above_flr) sensor_vertex = centroid + outward_normal.reverseVector else sub_surface = sensor_1_window[0] window_outward_normal = sub_surface.outwardNormal window_centroid = OpenStudio.getCentroid(sub_surface.vertices).get window_outward_normal.setLength(sensor_1_window[1][:head_height_m] * 0.66) vertex = window_centroid + window_outward_normal.reverseVector vertex_on_floorplane = floor_surface.plane.project(vertex) floor_outward_normal = floor_surface.outwardNormal floor_outward_normal.setLength(OpenStudio.convert(2.5, 'ft', 'm').get) sensor_vertex = vertex_on_floorplane + floor_outward_normal.reverseVector end sensor_1.setPosition(sensor_vertex) # TODO: rotate sensor to face window (only needed for glare calcs) zone.setPrimaryDaylightingControl(sensor_1) zone.setFractionofZoneControlledbyPrimaryDaylightingControl(sensor_1_frac) end # Second sensor if sensor_2_window # OpenStudio::logFree(OpenStudio::Info, "openstudio.model.Space", "For #{self.name}, calculating daylighted areas.") # runner.registerInfo("Daylight sensor 2 inside of #{sensor_2_frac.name}") sensor_2 = OpenStudio::Model::DaylightingControl.new(space.model) sensor_2.setName("#{space.name} Daylt Sensor 2") sensor_2.setSpace(space) sensor_2.setIlluminanceSetpoint(daylight_stpt_lux) sensor_2.setLightingControlType('Stepped') sensor_2.setNumberofSteppedControlSteps(3) # all sensors 3-step per design sensor_2.setMinimumInputPowerFractionforContinuousDimmingControl(0.3) sensor_2.setMinimumLightOutputFractionforContinuousDimmingControl(0.2) sensor_2.setProbabilityLightingwillbeResetWhenNeededinManualSteppedControl(1.0) sensor_2.setMaximumAllowableDiscomfortGlareIndex(22.0) # Place sensor depending on skylight or window sensor_vertex = nil if sensor_2_window[1][:facade] == '0-Up' sub_surface = sensor_2_window[0] outward_normal = sub_surface.outwardNormal centroid = OpenStudio.getCentroid(sub_surface.vertices).get ht_above_flr = OpenStudio.convert(2.5, 'ft', 'm').get outward_normal.setLength(sensor_2_window[1][:head_height_m] - ht_above_flr) sensor_vertex = centroid + outward_normal.reverseVector else sub_surface = sensor_2_window[0] window_outward_normal = sub_surface.outwardNormal window_centroid = OpenStudio.getCentroid(sub_surface.vertices).get window_outward_normal.setLength(sensor_2_window[1][:head_height_m] * 1.33) vertex = window_centroid + window_outward_normal.reverseVector vertex_on_floorplane = floor_surface.plane.project(vertex) floor_outward_normal = floor_surface.outwardNormal floor_outward_normal.setLength(OpenStudio.convert(2.5, 'ft', 'm').get) sensor_vertex = vertex_on_floorplane + floor_outward_normal.reverseVector end sensor_2.setPosition(sensor_vertex) # TODO: rotate sensor to face window (only needed for glare calcs) zone.setSecondaryDaylightingControl(sensor_2) zone.setFractionofZoneControlledbySecondaryDaylightingControl(sensor_2_frac) end return true end |
#space_apply_infiltration_rate(space) ⇒ Double
handle doors and vestibules
Set the infiltration rate for this space to include the impact of air leakage requirements in the standard.
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1215 def space_apply_infiltration_rate(space) # Determine the total building baseline infiltration rate basic_infil_rate_cfm_per_ft2 = space_infiltration_rate_75_pa(space) # Do nothing if no infiltration return true if basic_infil_rate_cfm_per_ft2.zero? # Conversion factor # 1 m^3/s*m^2 = 196.85 cfm/ft2 conv_fact = 196.85 # Adjust the infiltration rate to the average pressure # for the prototype buildings. adj_infil_rate_cfm_per_ft2 = adjust_infiltration_to_prototype_building_conditions(basic_infil_rate_cfm_per_ft2) adj_infil_rate_m3_per_s_per_m2 = adj_infil_rate_cfm_per_ft2 / conv_fact # Get the exterior wall area exterior_wall_and_window_area_m2 = space_exterior_wall_and_window_area(space) # Don't create an object if there is no exterior wall area if exterior_wall_and_window_area_m2 <= 0.0 OpenStudio.logFree(OpenStudio::Info, 'openstudio.Standards.Model', "For #{template}, no exterior wall area was found, no infiltration will be added.") return true end OpenStudio.logFree(OpenStudio::Info, 'openstudio.Standards.Model', "For #{space.name}, set infiltration rate to #{adj_infil_rate_cfm_per_ft2.round(3)} cfm/ft2 exterior wall area (aka #{basic_infil_rate_cfm_per_ft2} cfm/ft2 @75Pa).") # Calculate the total infiltration, assuming # that it only occurs through exterior walls tot_infil_m3_per_s = adj_infil_rate_m3_per_s_per_m2 * exterior_wall_and_window_area_m2 # Now spread the total infiltration rate over all # exterior surface areas (for the E+ input field) all_ext_infil_m3_per_s_per_m2 = tot_infil_m3_per_s / space.exteriorArea OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.Space', "For #{space.name}, adj infil = #{all_ext_infil_m3_per_s_per_m2.round(8)} m^3/s*m^2.") # Get any infiltration schedule already assigned to this space or its space type # If not, the always on schedule will be applied. infil_sch = nil unless space.spaceInfiltrationDesignFlowRates.empty? old_infil = space.spaceInfiltrationDesignFlowRates[0] if old_infil.schedule.is_initialized infil_sch = old_infil.schedule.get end end if infil_sch.nil? && space.spaceType.is_initialized space_type = space.spaceType.get unless space_type.spaceInfiltrationDesignFlowRates.empty? old_infil = space_type.spaceInfiltrationDesignFlowRates[0] if old_infil.schedule.is_initialized infil_sch = old_infil.schedule.get end end end if infil_sch.nil? infil_sch = space.model.alwaysOnDiscreteSchedule end # Create an infiltration rate object for this space infiltration = OpenStudio::Model::SpaceInfiltrationDesignFlowRate.new(space.model) infiltration.setName("#{space.name} Infiltration") # infiltration.setFlowperExteriorWallArea(adj_infil_rate_m3_per_s_per_m2) infiltration.setFlowperExteriorSurfaceArea(all_ext_infil_m3_per_s_per_m2) infiltration.setSchedule(infil_sch) infiltration.setConstantTermCoefficient(0.0) infiltration.setTemperatureTermCoefficient 0.0 infiltration.setVelocityTermCoefficient(0.224) infiltration.setVelocitySquaredTermCoefficient(0.0) infiltration.setSpace(space) return true end |
#space_conditioning_category(space, climate_zone) ⇒ String
add logic to detect indirectly-conditioned spaces
Determines whether the space is conditioned per 90.1, which is based on heating and cooling loads.
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1459 def space_conditioning_category(space, climate_zone) # Get the zone this space is inside zone = space.thermalZone # Assume unconditioned if not assigned to a zone if zone.empty? return 'Unconditioned' end # Get the category from the zone cond_cat = zone.get.conditioning_category(climate_zone) return cond_cat end |
#space_cooled?(space) ⇒ Bool
Determines cooling status. If the space’s zone has a thermostat with a minimum cooling setpoint above 33C (91F), counts as cooled.
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1501 def space_cooled?(space) # Get the zone this space is inside zone = space.thermalZone # Assume uncooled if not assigned to a zone if zone.empty? return false end # Get the category from the zone cld = thermal_zone_cooled?(zone.get) return cld end |
#space_daylighted_area_window_width(space) ⇒ String
Determines the method used to extend the daylighted area horizontally next to a window. If the method is ‘fixed’, 2 ft is added to the width of each window. If the method is ‘proportional’, a distance equal to half of the head height of the window is added. If the method is ‘none’, no additional width is added. Default is none.
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 551 def space_daylighted_area_window_width(space) method = 'none' return method end |
#space_daylighted_areas(space, draw_daylight_areas_for_debugging = false) ⇒ Hash
add a list of valid choices for template argument
This method is super complicated because of all the polygon/geometry math required. and therefore may not return perfect results. However, it works well in most tested situations. When it fails, it will log warnings/errors for users to see.
Returns values for the different types of daylighted areas in the space. Definitions for each type of area follow the respective template. TODO stop skipping non-vertical walls
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 19 def space_daylighted_areas(space, draw_daylight_areas_for_debugging = false) ### Begin the actual daylight area calculations ### OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "For #{space.name}, calculating daylighted areas.") result = { 'toplighted_area' => 0.0, 'primary_sidelighted_area' => 0.0, 'secondary_sidelighted_area' => 0.0, 'total_window_area' => 0.0, 'total_skylight_area' => 0.0 } total_window_area = 0 total_skylight_area = 0 # Make rendering colors to help debug visually if draw_daylight_areas_for_debugging # Yellow toplit_construction = OpenStudio::Model::Construction.new(space.model) toplit_color = OpenStudio::Model::RenderingColor.new(space.model) toplit_color.setRenderingRedValue(255) toplit_color.setRenderingGreenValue(255) toplit_color.setRenderingBlueValue(0) toplit_construction.setRenderingColor(toplit_color) # Red pri_sidelit_construction = OpenStudio::Model::Construction.new(space.model) pri_sidelit_color = OpenStudio::Model::RenderingColor.new(space.model) pri_sidelit_color.setRenderingRedValue(255) pri_sidelit_color.setRenderingGreenValue(0) pri_sidelit_color.setRenderingBlueValue(0) pri_sidelit_construction.setRenderingColor(pri_sidelit_color) # Blue sec_sidelit_construction = OpenStudio::Model::Construction.new(space.model) sec_sidelit_color = OpenStudio::Model::RenderingColor.new(space.model) sec_sidelit_color.setRenderingRedValue(0) sec_sidelit_color.setRenderingGreenValue(0) sec_sidelit_color.setRenderingBlueValue(255) sec_sidelit_construction.setRenderingColor(sec_sidelit_color) # Light Blue flr_construction = OpenStudio::Model::Construction.new(space.model) flr_color = OpenStudio::Model::RenderingColor.new(space.model) flr_color.setRenderingRedValue(0) flr_color.setRenderingGreenValue(255) flr_color.setRenderingBlueValue(255) flr_construction.setRenderingColor(flr_color) end # Move the polygon up slightly for viewability in sketchup up_translation_flr = OpenStudio.createTranslation(OpenStudio::Vector3d.new(0, 0, 0.05)) up_translation_top = OpenStudio.createTranslation(OpenStudio::Vector3d.new(0, 0, 0.1)) up_translation_pri = OpenStudio.createTranslation(OpenStudio::Vector3d.new(0, 0, 0.1)) up_translation_sec = OpenStudio.createTranslation(OpenStudio::Vector3d.new(0, 0, 0.1)) # Get the space's surface group's transformation @space_transformation = space.transformation # Record a floor in the space for later use floor_surface = nil # Record all floor polygons floor_polygons = [] floor_z = 0.0 space.surfaces.sort.each do |surface| if surface.surfaceType == 'Floor' floor_surface = surface floor_z = surface.vertices[0].z # floor_polygons << surface.vertices # Hard-set the z for the floor to zero new_floor_polygon = [] surface.vertices.each do |vertex| new_floor_polygon << OpenStudio::Point3d.new(vertex.x, vertex.y, 0.0) end floor_polygons << new_floor_polygon end end # Make sure there is one floor surface if floor_surface.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "Could not find a floor in space #{name.get}, cannot determine daylighted areas.") return result end # Make a set of vertices representing each subsurfaces sidelighteding area # and fold them all down onto the floor of the self. toplit_polygons = [] pri_sidelit_polygons = [] sec_sidelit_polygons = [] space.surfaces.sort.each do |surface| if surface.outsideBoundaryCondition == 'Outdoors' && surface.surfaceType == 'Wall' # TODO: stop skipping non-vertical walls surface_normal = surface.outwardNormal surface_normal_z = surface_normal.z unless surface_normal_z.abs < 0.001 unless surface.subSurfaces.empty? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "Cannot currently handle non-vertical walls; skipping windows on #{surface.name} in #{space.name}.") next end end surface.subSurfaces.sort.each do |sub_surface| next unless sub_surface.outsideBoundaryCondition == 'Outdoors' && (sub_surface.subSurfaceType == 'FixedWindow' || sub_surface.subSurfaceType == 'OperableWindow' || sub_surface.subSurfaceType == 'GlassDoor') # OpenStudio::logFree(OpenStudio::Debug, "openstudio.model.Space", "***#{sub_surface.name}***" total_window_area += sub_surface.netArea # Find the head height and sill height of the window vertex_heights_above_floor = [] sub_surface.vertices.each do |vertex| vertex_on_floorplane = floor_surface.plane.project(vertex) vertex_heights_above_floor << (vertex - vertex_on_floorplane).length end sill_height_m = vertex_heights_above_floor.min head_height_m = vertex_heights_above_floor.max # OpenStudio::logFree(OpenStudio::Debug, "openstudio.model.Space", "head height = #{head_height_m.round(2)}m, sill height = #{sill_height_m.round(2)}m") # Find the width of the window rot_origin = nil unless sub_surface.vertices.size == 4 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "A sub-surface in space #{space.name} has other than 4 vertices; this sub-surface will not be included in the daylighted area calculation.") next end prev_vertex_on_floorplane = nil max_window_width_m = 0 sub_surface.vertices.each do |vertex| vertex_on_floorplane = floor_surface.plane.project(vertex) unless prev_vertex_on_floorplane prev_vertex_on_floorplane = vertex_on_floorplane next end width_m = (prev_vertex_on_floorplane - vertex_on_floorplane).length if width_m > max_window_width_m max_window_width_m = width_m rot_origin = vertex_on_floorplane end end # Determine the extra width to add to the sidelighted area extra_width_m = 0 width_method = space_daylighted_area_window_width(space) if width_method == 'proportional' extra_width_m = head_height_m / 2 elsif width_method == 'fixed' extra_width_m = OpenStudio.convert(2, 'ft', 'm').get end # OpenStudio::logFree(OpenStudio::Debug, "openstudio.model.Space", "Adding #{extra_width_m.round(2)}m to the width for the sidelighted area.") # Align the vertices with face coordinate system face_transform = OpenStudio::Transformation.alignFace(sub_surface.vertices) aligned_vertices = face_transform.inverse * sub_surface.vertices # Find the min and max x values min_x_val = 99_999 max_x_val = -99_999 aligned_vertices.each do |vertex| # Min x value if vertex.x < min_x_val min_x_val = vertex.x end # Max x value if vertex.x > max_x_val max_x_val = vertex.x end end # OpenStudio::logFree(OpenStudio::Debug, "openstudio.model.Space", "min_x_val = #{min_x_val.round(2)}, max_x_val = #{max_x_val.round(2)}") # Create polygons that are adjusted # to expand from the window shape to the sidelighteded areas. pri_sidelit_sub_polygon = [] sec_sidelit_sub_polygon = [] aligned_vertices.each do |vertex| # Primary sidelighted area # Move the x vertices outward by the specified amount. if (vertex.x - min_x_val).abs < 0.01 new_x = vertex.x - extra_width_m elsif (vertex.x - max_x_val).abs < 0.01 new_x = vertex.x + extra_width_m else new_x = 99.9 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "A window in space #{space.name} is non-rectangular; this sub-surface will not be included in the primary daylighted area calculation. #{vertex.x} != #{min_x_val} or #{max_x_val}") end # Zero-out the y for the bottom edge because the # sidelighteding area extends down to the floor. new_y = if vertex.y.zero? vertex.y - sill_height_m else vertex.y end # Set z = 0 so that intersection works. new_z = 0.0 # Make the new vertex new_vertex = OpenStudio::Point3d.new(new_x, new_y, new_z) pri_sidelit_sub_polygon << new_vertex # OpenStudio::logFree(OpenStudio::Info, "openstudio.model.Space", "#{vertex.x.round(2)}, #{vertex.y.round(2)}, #{vertex.z.round(2)} ==> #{new_vertex.x.round(2)}, #{new_vertex.y.round(2)}, #{new_vertex.z.round(2)}") # Secondary sidelighted area # Move the x vertices outward by the specified amount. if (vertex.x - min_x_val).abs < 0.01 new_x = vertex.x - extra_width_m elsif (vertex.x - max_x_val).abs < 0.01 new_x = vertex.x + extra_width_m else new_x = 99.9 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "A window in space #{space.name} is non-rectangular; this sub-surface will not be included in the secondary daylighted area calculation.") end # Add the head height of the window to all points # sidelighteding area extends down to the floor. new_y = if vertex.y.zero? vertex.y - sill_height_m + head_height_m else vertex.y + head_height_m end # Set z = 0 so that intersection works. new_z = 0.0 # Make the new vertex new_vertex = OpenStudio::Point3d.new(new_x, new_y, new_z) sec_sidelit_sub_polygon << new_vertex end # Realign the vertices with space coordinate system pri_sidelit_sub_polygon = face_transform * pri_sidelit_sub_polygon sec_sidelit_sub_polygon = face_transform * sec_sidelit_sub_polygon # Rotate the sidelighteded areas down onto the floor down_vector = OpenStudio::Vector3d.new(0, 0, -1) outward_normal_vector = sub_surface.outwardNormal rot_vector = down_vector.cross(outward_normal_vector) ninety_deg_in_rad = OpenStudio.degToRad(90) # TODO: change new_rotation = OpenStudio.createRotation(rot_origin, rot_vector, ninety_deg_in_rad) pri_sidelit_sub_polygon = new_rotation * pri_sidelit_sub_polygon sec_sidelit_sub_polygon = new_rotation * sec_sidelit_sub_polygon # Put the polygon vertices into counterclockwise order pri_sidelit_sub_polygon = pri_sidelit_sub_polygon.reverse sec_sidelit_sub_polygon = sec_sidelit_sub_polygon.reverse # Add these polygons to the list pri_sidelit_polygons << pri_sidelit_sub_polygon sec_sidelit_polygons << sec_sidelit_sub_polygon end # Next subsurface elsif surface.outsideBoundaryCondition == 'Outdoors' && surface.surfaceType == 'RoofCeiling' # TODO: stop skipping non-horizontal roofs surface_normal = surface.outwardNormal straight_upward = OpenStudio::Vector3d.new(0, 0, 1) unless surface_normal.to_s == straight_upward.to_s unless surface.subSurfaces.empty? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "Cannot currently handle non-horizontal roofs; skipping skylights on #{surface.name} in #{space.name}.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "---Surface #{surface.name} has outward normal of #{surface_normal.to_s.gsub(/\[|\]/, '|')}; up is #{straight_upward.to_s.gsub(/\[|\]/, '|')}.") next end end surface.subSurfaces.sort.each do |sub_surface| next unless sub_surface.outsideBoundaryCondition == 'Outdoors' && sub_surface.subSurfaceType == 'Skylight' # OpenStudio::logFree(OpenStudio::Debug, "openstudio.model.Space", "***#{sub_surface.name}***") total_skylight_area += sub_surface.netArea # Project the skylight onto the floor plane polygon_on_floor = [] vertex_heights_above_floor = [] sub_surface.vertices.each do |vertex| vertex_on_floorplane = floor_surface.plane.project(vertex) vertex_heights_above_floor << (vertex - vertex_on_floorplane).length polygon_on_floor << vertex_on_floorplane end # Determine the ceiling height. # Assumes skylight is flush with ceiling. ceiling_height_m = vertex_heights_above_floor.max # Align the vertices with face coordinate system face_transform = OpenStudio::Transformation.alignFace(polygon_on_floor) aligned_vertices = face_transform.inverse * polygon_on_floor # Find the min and max x and y values min_x_val = 99_999 max_x_val = -99_999 min_y_val = 99_999 max_y_val = -99_999 aligned_vertices.each do |vertex| # Min x value if vertex.x < min_x_val min_x_val = vertex.x end # Max x value if vertex.x > max_x_val max_x_val = vertex.x end # Min y value if vertex.y < min_y_val min_y_val = vertex.y end # Max y value if vertex.y > max_x_val max_y_val = vertex.y end end # Figure out how much to expand the window additional_extent_m = 0.7 * ceiling_height_m # Create polygons that are adjusted # to expand from the window shape to the sidelighteded areas. toplit_sub_polygon = [] aligned_vertices.each do |vertex| # Move the x vertices outward by the specified amount. if vertex.x == min_x_val new_x = vertex.x - additional_extent_m elsif vertex.x == max_x_val new_x = vertex.x + additional_extent_m else new_x = 99.9 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "A skylight in space #{space.name} is non-rectangular; this sub-surface will not be included in the daylighted area calculation.") end # Move the y vertices outward by the specified amount. if vertex.y == min_y_val new_y = vertex.y - additional_extent_m elsif vertex.y == max_y_val new_y = vertex.y + additional_extent_m else new_y = 99.9 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "A skylight in space #{space.name} is non-rectangular; this sub-surface will not be included in the daylighted area calculation.") end # Set z = 0 so that intersection works. new_z = 0.0 # Make the new vertex new_vertex = OpenStudio::Point3d.new(new_x, new_y, new_z) toplit_sub_polygon << new_vertex end # Realign the vertices with space coordinate system toplit_sub_polygon = face_transform * toplit_sub_polygon # Put the polygon vertices into counterclockwise order toplit_sub_polygon = toplit_sub_polygon.reverse # Add these polygons to the list toplit_polygons << toplit_sub_polygon end # Next subsurface end # End if outdoor wall or roofceiling end # Next surface # Set z=0 for all the polygons so that intersection will work toplit_polygons = space_polygons_set_z(space, toplit_polygons, 0.0) pri_sidelit_polygons = space_polygons_set_z(space, pri_sidelit_polygons, 0.0) sec_sidelit_polygons = space_polygons_set_z(space, sec_sidelit_polygons, 0.0) # Check the initial polygons space_check_z_zero(space, floor_polygons, 'floor_polygons') space_check_z_zero(space, toplit_polygons, 'toplit_polygons') space_check_z_zero(space, pri_sidelit_polygons, 'pri_sidelit_polygons') space_check_z_zero(space, sec_sidelit_polygons, 'sec_sidelit_polygons') # Join, then subtract OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', '***Joining polygons***') # Join toplighted polygons into a single set combined_toplit_polygons = space_join_polygons(space, toplit_polygons, 0.01, 'toplit_polygons') # Join primary sidelighted polygons into a single set combined_pri_sidelit_polygons = space_join_polygons(space, pri_sidelit_polygons, 0.01, 'pri_sidelit_polygons') # Join secondary sidelighted polygons into a single set combined_sec_sidelit_polygons = space_join_polygons(space, sec_sidelit_polygons, 0.01, 'sec_sidelit_polygons') # Join floor polygons into a single set combined_floor_polygons = space_join_polygons(space, floor_polygons, 0.01, 'floor_polygons') # Check the joined polygons space_check_z_zero(space, combined_floor_polygons, 'combined_floor_polygons') space_check_z_zero(space, combined_toplit_polygons, 'combined_toplit_polygons') space_check_z_zero(space, combined_pri_sidelit_polygons, 'combined_pri_sidelit_polygons') space_check_z_zero(space, combined_sec_sidelit_polygons, 'combined_sec_sidelit_polygons') # Make a new surface for each of the resulting polygons to visually inspect it # OpenStudio::logFree(OpenStudio::Debug, "openstudio.model.Space", "***Making Surfaces to view in SketchUp***") # combined_toplit_polygons.each do |polygon| # dummy_space = OpenStudio::Model::Space.new(model) # polygon = up_translation_top * polygon # daylt_surf = OpenStudio::Model::Surface.new(polygon, model) # daylt_surf.setConstruction(toplit_construction) # daylt_surf.setSpace(dummy_space) # daylt_surf.setName("Top") # end # combined_pri_sidelit_polygons.each do |polygon| # dummy_space = OpenStudio::Model::Space.new(model) # polygon = up_translation_pri * polygon # daylt_surf = OpenStudio::Model::Surface.new(polygon, model) # daylt_surf.setConstruction(pri_sidelit_construction) # daylt_surf.setSpace(dummy_space) # daylt_surf.setName("Pri") # end # combined_sec_sidelit_polygons.each do |polygon| # dummy_space = OpenStudio::Model::Space.new(model) # polygon = up_translation_sec * polygon # daylt_surf = OpenStudio::Model::Surface.new(polygon, model) # daylt_surf.setConstruction(sec_sidelit_construction) # daylt_surf.setSpace(dummy_space) # daylt_surf.setName("Sec") # end # combined_floor_polygons.each do |polygon| # dummy_space = OpenStudio::Model::Space.new(model) # polygon = up_translation_flr * polygon # daylt_surf = OpenStudio::Model::Surface.new(polygon, model) # daylt_surf.setConstruction(flr_construction) # daylt_surf.setSpace(dummy_space) # daylt_surf.setName("Flr") # end OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', '***Subtracting overlapping areas***') # Subtract lower-priority daylighting areas from higher priority ones pri_minus_top_polygons = space_a_polygons_minus_b_polygons(space, combined_pri_sidelit_polygons, combined_toplit_polygons, 'combined_pri_sidelit_polygons', 'combined_toplit_polygons') sec_minus_top_polygons = space_a_polygons_minus_b_polygons(space, combined_sec_sidelit_polygons, combined_toplit_polygons, 'combined_sec_sidelit_polygons', 'combined_toplit_polygons') sec_minus_top_minus_pri_polygons = space_a_polygons_minus_b_polygons(space, sec_minus_top_polygons, combined_pri_sidelit_polygons, 'sec_minus_top_polygons', 'combined_pri_sidelit_polygons') # Check the subtracted polygons space_check_z_zero(space, pri_minus_top_polygons, 'pri_minus_top_polygons') space_check_z_zero(space, sec_minus_top_polygons, 'sec_minus_top_polygons') space_check_z_zero(space, sec_minus_top_minus_pri_polygons, 'sec_minus_top_minus_pri_polygons') # Make a new surface for each of the resulting polygons to visually inspect it. # First reset the z so the surfaces show up on the correct plane. if draw_daylight_areas_for_debugging combined_toplit_polygons_at_floor = space_polygons_set_z(space, combined_toplit_polygons, floor_z) pri_minus_top_polygons_at_floor = space_polygons_set_z(space, pri_minus_top_polygons, floor_z) sec_minus_top_minus_pri_polygons_at_floor = space_polygons_set_z(space, sec_minus_top_minus_pri_polygons, floor_z) combined_floor_polygons_at_floor = space_polygons_set_z(space, combined_floor_polygons, floor_z) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', '***Making Surfaces to view in SketchUp***') dummy_space = OpenStudio::Model::Space.new(space.model) combined_toplit_polygons_at_floor.each do |polygon| polygon = up_translation_top * polygon polygon = @space_transformation * polygon daylt_surf = OpenStudio::Model::Surface.new(polygon, space.model) daylt_surf.setConstruction(toplit_construction) daylt_surf.setSpace(dummy_space) daylt_surf.setName('Top') end pri_minus_top_polygons_at_floor.each do |polygon| polygon = up_translation_pri * polygon polygon = @space_transformation * polygon daylt_surf = OpenStudio::Model::Surface.new(polygon, space.model) daylt_surf.setConstruction(pri_sidelit_construction) daylt_surf.setSpace(dummy_space) daylt_surf.setName('Pri') end sec_minus_top_minus_pri_polygons_at_floor.each do |polygon| polygon = up_translation_sec * polygon polygon = @space_transformation * polygon daylt_surf = OpenStudio::Model::Surface.new(polygon, space.model) daylt_surf.setConstruction(sec_sidelit_construction) daylt_surf.setSpace(dummy_space) daylt_surf.setName('Sec') end combined_floor_polygons_at_floor.each do |polygon| polygon = up_translation_flr * polygon polygon = @space_transformation * polygon daylt_surf = OpenStudio::Model::Surface.new(polygon, space.model) daylt_surf.setConstruction(flr_construction) daylt_surf.setSpace(dummy_space) daylt_surf.setName('Flr') end end OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', '***Calculating Daylighted Areas***') # Get the total floor area total_floor_area_m2 = space_total_area_of_polygons(space, combined_floor_polygons) total_floor_area_ft2 = OpenStudio.convert(total_floor_area_m2, 'm^2', 'ft^2').get OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "total_floor_area_ft2 = #{total_floor_area_ft2.round(1)}") # Toplighted area toplighted_area_m2 = space_area_a_polygons_overlap_b_polygons(space, combined_toplit_polygons, combined_floor_polygons, 'combined_toplit_polygons', 'combined_floor_polygons') # Primary sidelighted area primary_sidelighted_area_m2 = space_area_a_polygons_overlap_b_polygons(space, pri_minus_top_polygons, combined_floor_polygons, 'pri_minus_top_polygons', 'combined_floor_polygons') # Secondary sidelighted area secondary_sidelighted_area_m2 = space_area_a_polygons_overlap_b_polygons(space, sec_minus_top_minus_pri_polygons, combined_floor_polygons, 'sec_minus_top_minus_pri_polygons', 'combined_floor_polygons') # Convert to IP for displaying toplighted_area_ft2 = OpenStudio.convert(toplighted_area_m2, 'm^2', 'ft^2').get primary_sidelighted_area_ft2 = OpenStudio.convert(primary_sidelighted_area_m2, 'm^2', 'ft^2').get secondary_sidelighted_area_ft2 = OpenStudio.convert(secondary_sidelighted_area_m2, 'm^2', 'ft^2').get OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "toplighted_area_ft2 = #{toplighted_area_ft2.round(1)}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "primary_sidelighted_area_ft2 = #{primary_sidelighted_area_ft2.round(1)}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "secondary_sidelighted_area_ft2 = #{secondary_sidelighted_area_ft2.round(1)}") result['toplighted_area'] = toplighted_area_m2 result['primary_sidelighted_area'] = primary_sidelighted_area_m2 result['secondary_sidelighted_area'] = secondary_sidelighted_area_m2 result['total_window_area'] = total_window_area result['total_skylight_area'] = total_skylight_area return result end |
#space_daylighting_control_required?(space, areas) ⇒ Array<Bool>
Determine if the space requires daylighting controls for toplighting, primary sidelighting, and secondary sidelighting. Defaults to false for all types.
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1181 def space_daylighting_control_required?(space, areas) req_top_ctrl = false req_pri_ctrl = false req_sec_ctrl = false return [req_top_ctrl, req_pri_ctrl, req_sec_ctrl] end |
#space_daylighting_fractions_and_windows(space, areas, sorted_windows, sorted_skylights, req_top_ctrl, req_pri_ctrl, req_sec_ctrl) ⇒ Object
Determine the fraction controlled by each sensor and which window each sensor should go near.
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1195 def space_daylighting_fractions_and_windows(space, areas, sorted_windows, sorted_skylights, req_top_ctrl, req_pri_ctrl, req_sec_ctrl) sensor_1_frac = 0.0 sensor_2_frac = 0.0 sensor_1_window = nil sensor_2_window = nil return [sensor_1_frac, sensor_2_frac, sensor_1_window, sensor_2_window] end |
#space_design_internal_load(space) ⇒ Double
Determine the design internal load (W) for this space without space multipliers. This include People, Lights, Electric Equipment, and Gas Equipment. It assumes 100% of the wattage is converted to heat, and that the design peak schedule value is 1 (100%).
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1524 def space_design_internal_load(space) load_w = 0.0 # People space.people.each do |people| w_per_person = 125 # Initial assumption act_sch = people.activityLevelSchedule if act_sch.is_initialized if act_sch.get.to_ScheduleRuleset.is_initialized act_sch = act_sch.get.to_ScheduleRuleset.get w_per_person = schedule_ruleset_annual_min_max_value(act_sch)['max'] else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "#{space.name} people activity schedule is not a Schedule:Ruleset. Assuming #{w_per_person}W/person.") end OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "#{space.name} people activity schedule not found. Assuming #{w_per_person}W/person.") end num_ppl = people.getNumberOfPeople(floorArea) ppl_w = num_ppl * w_per_person load_w += ppl_w end # Lights load_w += space.lightingPower # Electric Equipment load_w += space.electricEquipmentPower # Gas Equipment load_w += space.gasEquipmentPower OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.Space', "#{space.name} has #{load_w.round}W of design internal loads.") return load_w end |
#space_exterior_wall_and_roof_and_subsurface_area(space) ⇒ Double
Calculate the area of the exterior walls, including the area of the windows on these walls.
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1327 def space_exterior_wall_and_roof_and_subsurface_area(space) area_m2 = 0.0 # Loop through all surfaces in this space space.surfaces.sort.each do |surface| # Skip non-outdoor surfaces next unless surface.outsideBoundaryCondition == 'Outdoors' # Skip non-walls next unless surface.surfaceType == 'Wall' || surface.surfaceType == 'RoofCeiling' # This surface area_m2 += surface.netArea # Subsurfaces in this surface surface.subSurfaces.sort.each do |subsurface| area_m2 += subsurface.netArea end end return area_m2 end |
#space_exterior_wall_and_window_area(space) ⇒ Double
Calculate the area of the exterior walls, including the area of the windows on these walls.
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1303 def space_exterior_wall_and_window_area(space) area_m2 = 0.0 # Loop through all surfaces in this space space.surfaces.sort.each do |surface| # Skip non-outdoor surfaces next unless surface.outsideBoundaryCondition == 'Outdoors' # Skip non-walls next unless surface.surfaceType == 'Wall' # This surface area_m2 += surface.netArea # Subsurfaces in this surface surface.subSurfaces.sort.each do |subsurface| area_m2 += subsurface.netArea end end return area_m2 end |
#space_get_adjacent_space_with_most_shared_wall_area(space, same_floor = true) ⇒ Object
Find the space that has the most wall area touching this space.
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1619 def space_get_adjacent_space_with_most_shared_wall_area(space, same_floor = true) return get_adjacent_spaces_with_touching_area(same_floor)[0][0] end |
#space_get_adjacent_spaces_with_shared_wall_areas(space, same_floor = true) ⇒ Object
will return a sorted array of array of spaces and connected area (Descending)
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1563 def space_get_adjacent_spaces_with_shared_wall_areas(space, same_floor = true) same_floor_spaces = [] spaces = [] space.surfaces.each do |surface| adj_surface = surface.adjacentSurface unless adj_surface.empty? space.model.getSpaces.sort.each do |other_space| next if other_space == space other_space.surfaces.each do |surf| if surf == adj_surface.get spaces << other_space end end end end end # If looking for only spaces adjacent on the same floor. if same_floor == true raise "Cannot get adjacent spaces of space #{space.name} since space not set to BuildingStory" if space.buildingStory.empty? spaces.each do |other_space| raise "One or more adjecent spaces to space #{space.name} is not assigned to a BuildingStory. Ensure all spaces are assigned." if space.buildingStory.empty? if other_space.buildingStory.get == space.buildingStory.get same_floor_spaces << other_space end end spaces = same_floor_spaces end # now sort by areas. area_index = [] array_hash = {} return nil if spaces.size.zero? # iterate through each surface in the space space.surfaces.each do |surface| # get the adjacent surface in another space. adj_surface = surface.adjacentSurface unless adj_surface.empty? # go through each of the adjeacent spaces to find the matching surface/space. spaces.each_with_index do |other_space, index| next if other_space == space other_space.surfaces.each do |surf| if surf == adj_surface.get # initialize array index to zero for first time so += will work. area_index[index] = 0 if area_index[index].nil? area_index[index] += surf.grossArea array_hash[other_space] = area_index[index] end end end end end sorted_spaces = array_hash.sort_by { |_key, value| value }.reverse return sorted_spaces end |
#space_heated?(space) ⇒ Bool
Determines heating status. If the space’s zone has a thermostat with a maximum heating setpoint above 5C (41F), counts as heated.
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1480 def space_heated?(space) # Get the zone this space is inside zone = space.thermalZone # Assume unheated if not assigned to a zone if zone.empty? return false end # Get the category from the zone htd = thermal_zone_heated?(zone.get) return htd end |
#space_infiltration_rate_75_pa(space) ⇒ Double
Determine the base infiltration rate at 75 PA.
defaults to no infiltration.
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1294 def space_infiltration_rate_75_pa(space) basic_infil_rate_cfm_per_ft2 = 0 return basic_infil_rate_cfm_per_ft2 end |
#space_plenum?(space) ⇒ Boolean
Determine if the space is a plenum. Assume it is a plenum if it is a supply or return plenum for an AirLoop, if it is not part of the total floor area, or if the space type name contains the word plenum.
return [Bool] returns true if plenum, false if not
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1355 def space_plenum?(space) plenum_status = false # Check if it is designated # as not part of the building # floor area. This method internally # also checks to see if the space's zone # is a supply or return plenum unless space.partofTotalFloorArea plenum_status = true return plenum_status end # TODO: - update to check if it has internal loads # Check if the space type name # contains the word plenum. space_type = space.spaceType if space_type.is_initialized space_type = space_type.get if space_type.name.get.to_s.downcase.include?('plenum') plenum_status = true return plenum_status end if space_type.standardsSpaceType.is_initialized if space_type.standardsSpaceType.get.downcase.include?('plenum') plenum_status = true return plenum_status end end end return plenum_status end |
#space_residential?(space) ⇒ Boolean
Determine if the space is residential based on the space type properties for the space. For spaces with no space type, assume nonresidential. For spaces that are plenums, base the decision on the space type of the space below the largest floor in the plenum.
return [Bool] true if residential, false if nonresidential
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 1397 def space_residential?(space) is_res = false space_to_check = space # If this space is a plenum, check the space type # of the space below the largest floor in the space if space_plenum?(space) # Find the largest floor largest_floor_area = 0.0 largest_surface = nil space.surfaces.each do |surface| next unless surface.surfaceType == 'Floor' && surface.outsideBoundaryCondition == 'Surface' if surface.grossArea > largest_floor_area largest_floor_area = surface.grossArea largest_surface = surface end end if largest_surface.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Space', "#{space.name} is a plenum, but could not find a floor with a space below it to determine if plenum should be res or nonres. Assuming nonresidential.") return is_res end # Get the space on the other side of this floor if largest_surface.adjacentSurface.is_initialized adj_surface = largest_surface.adjacentSurface.get if adj_surface.space.is_initialized space_to_check = adj_surface.space.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Space', "#{space.name} is a plenum, but could not find a space attached to the largest floor's adjacent surface #{adj_surface.name} to determine if plenum should be res or nonres. Assuming nonresidential.") return is_res end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Space', "#{space.name} is a plenum, but could not find a floor with a space below it to determine if plenum should be res or nonres. Assuming nonresidential.") return is_res end end space_type = space_to_check.spaceType if space_type.is_initialized space_type = space_type.get # Get the space type data space_type_properties = space_type_get_standards_data(space_type) if space_type_properties.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Space', "Could not find space type properties for #{space_to_check.name}, assuming nonresidential.") is_res = false else is_res = space_type_properties['is_residential'] == 'Yes' end else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Space', "Could not find a space type for #{space_to_check.name}, assuming nonresidential.") is_res = false end return is_res end |
#space_sidelighting_effective_aperture(space, primary_sidelighted_area) ⇒ Double
Returns the sidelighting effective aperture space_sidelighting_effective_aperture(space) = E(window area * window VT) / primary_sidelighted_area
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 561 def space_sidelighting_effective_aperture(space, primary_sidelighted_area) # space_sidelighting_effective_aperture(space) = E(window area * window VT) / primary_sidelighted_area sidelighting_effective_aperture = 9999 num_sub_surfaces = 0 # Loop through all windows and add up area * VT sum_window_area_times_vt = 0 construction_name_to_vt_map = {} space.surfaces.sort.each do |surface| next unless surface.outsideBoundaryCondition == 'Outdoors' && surface.surfaceType == 'Wall' surface.subSurfaces.sort.each do |sub_surface| next unless sub_surface.outsideBoundaryCondition == 'Outdoors' && (sub_surface.subSurfaceType == 'FixedWindow' || sub_surface.subSurfaceType == 'OperableWindow' || sub_surface.subSurfaceType == 'GlassDoor') num_sub_surfaces += 1 # Get the area area_m2 = sub_surface.netArea # Get the window construction name construction_name = nil construction = sub_surface.construction if construction.is_initialized construction_name = construction.get.name.get.upcase else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "For #{space.name}, could not determine construction for #{sub_surface.name}, will not be included in space_sidelighting_effective_aperture(space) calculation.") next end # Store VT for this construction in map if not already looked up if construction_name_to_vt_map[construction_name].nil? sql = space.model.sqlFile if sql.is_initialized sql = sql.get row_query = "SELECT RowName FROM tabulardatawithstrings WHERE ReportName='EnvelopeSummary' AND ReportForString='Entire Facility' AND TableName='Exterior Fenestration' AND Value='#{construction_name.upcase}'" row_id = sql.execAndReturnFirstString(row_query) if row_id.is_initialized row_id = row_id.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', "VT row ID not found for construction: #{construction_name}, #{sub_surface.name} will not be included in space_sidelighting_effective_aperture(space) calculation.") row_id = 9999 end vt_query = "SELECT Value FROM tabulardatawithstrings WHERE ReportName='EnvelopeSummary' AND ReportForString='Entire Facility' AND TableName='Exterior Fenestration' AND ColumnName='Glass Visible Transmittance' AND RowName='#{row_id}'" vt = sql.execAndReturnFirstDouble(vt_query) vt = if vt.is_initialized vt.get end # Record the VT construction_name_to_vt_map[construction_name] = vt else OpenStudio.logFree(OpenStudio::Error, 'openstudio.standards.Space', 'Model has no sql file containing results, cannot lookup data.') end end # Get the VT from the map vt = construction_name_to_vt_map[construction_name] if vt.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "For #{space.name}, could not determine VLT for #{construction_name}, will not be included in sidelighting effective aperture caluclation.") vt = 0 end sum_window_area_times_vt += area_m2 * vt end end # Calculate the effective aperture if sum_window_area_times_vt.zero? sidelighting_effective_aperture = 9999 if num_sub_surfaces > 0 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Space', "#{space.name} has no windows where VLT could be determined, sidelighting effective aperture will be higher than it should.") end else sidelighting_effective_aperture = sum_window_area_times_vt / primary_sidelighted_area end OpenStudio.logFree(OpenStudio::Debug, 'openstudio.standards.Space', "For #{space.name} sidelighting effective aperture = #{sidelighting_effective_aperture.round(4)}.") return sidelighting_effective_aperture end |
#space_skylight_effective_aperture(space, toplighted_area) ⇒ Double
Returns the skylight effective aperture space_skylight_effective_aperture(space) = E(0.85 * skylight area * skylight VT * WF) / toplighted_area
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# File 'lib/openstudio-standards/standards/Standards.Space.rb', line 668 def space_skylight_effective_aperture(space, toplighted_area) # space_skylight_effective_aperture(space) = E(0.85 * skylight area * skylight VT * WF) / toplighted_area skylight_effective_aperture = 0.0 num_sub_surfaces = 0 # Assume that well factor (WF) is 0.9 (all wells are less than 2 feet deep) OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Space', 'Assuming that all skylight wells are less than 2 feet deep to calculate skylight effective aperture.') wf = 0.9 # Loop through all windows and add up area * VT sum_85pct_times_skylight_area_times_vt_times_wf = 0 construction_name_to_vt_map = {} space.surfaces.sort.each do |surface| next unless surface.outsideBoundaryCondition == 'Outdoors' && surface.surfaceType == 'RoofCeiling' surface.subSurfaces.sort.each do |sub_surface| next unless sub_surface.outsideBoundaryCondition == 'Outdoors' && sub_surface.subSurfaceType == 'Skylight' num_sub_surfaces += 1 # Get the area area_m2 = sub_surface.netArea # Get the window construction name construction_name = nil construction = sub_surface.construction if construction.is_initialized construction_name = construction.get.name.get.upcase else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "For #{space.name}, ") next end # Store VT for this construction in map if not already looked up if construction_name_to_vt_map[construction_name].nil? sql = space.model.sqlFile if sql.is_initialized sql = sql.get row_query = "SELECT RowName FROM tabulardatawithstrings WHERE ReportName='EnvelopeSummary' AND ReportForString='Entire Facility' AND TableName='Exterior Fenestration' AND Value='#{construction_name}'" row_id = sql.execAndReturnFirstString(row_query) if row_id.is_initialized row_id = row_id.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', "Data not found for query: #{row_query}") next end vt_query = "SELECT Value FROM tabulardatawithstrings WHERE ReportName='EnvelopeSummary' AND ReportForString='Entire Facility' AND TableName='Exterior Fenestration' AND ColumnName='Glass Visible Transmittance' AND RowName='#{row_id}'" vt = sql.execAndReturnFirstDouble(vt_query) vt = if vt.is_initialized vt.get end # Record the VT construction_name_to_vt_map[construction_name] = vt else OpenStudio.logFree(OpenStudio::Error, 'openstudio.model.Model', 'Model has no sql file containing results, cannot lookup data.') end end # Get the VT from the map vt = construction_name_to_vt_map[construction_name] if vt.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Space', "For #{space.name}, could not determine VLT for #{construction_name}, will not be included in skylight effective aperture caluclation.") vt = 0 end sum_85pct_times_skylight_area_times_vt_times_wf += 0.85 * area_m2 * vt * wf end end # Calculate the effective aperture if sum_85pct_times_skylight_area_times_vt_times_wf.zero? skylight_effective_aperture = 9999 if num_sub_surfaces > 0 OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.Space', "#{space.name} has no skylights where VLT could be determined, skylight effective aperture will be higher than it should.") end else skylight_effective_aperture = sum_85pct_times_skylight_area_times_vt_times_wf / toplighted_area end OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.Space', "#{space.name} skylight effective aperture = #{skylight_effective_aperture}.") return skylight_effective_aperture end |
#space_type_apply_internal_load_schedules(space_type, set_people, set_lights, set_electric_equipment, set_gas_equipment, set_ventilation, set_infiltration, make_thermostat) ⇒ Bool
Sets the schedules for the selected internal loads to typical schedules. Get the default schedule set for this space type if one exists or make one if none exists. For each category that is selected, add the typical schedule for this category to the default schedule set. This method does not alter any schedules of any internal loads that does not inherit from the default schedule set.
schedules listed for the space type. This thermostat is not hooked to any zone by this method, but may be found and used later.
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# File 'lib/openstudio-standards/standards/Standards.SpaceType.rb', line 464 def space_type_apply_internal_load_schedules(space_type, set_people, set_lights, set_electric_equipment, set_gas_equipment, set_ventilation, set_infiltration, make_thermostat) # Get the standards data space_type_properties = space_type_get_standards_data(space_type) # Get the default schedule set # or create a new one if none exists. default_sch_set = nil if space_type.defaultScheduleSet.is_initialized default_sch_set = space_type.defaultScheduleSet.get else default_sch_set = OpenStudio::Model::DefaultScheduleSet.new(space_type.model) default_sch_set.setName("#{space_type.name} Schedule Set") space_type.setDefaultScheduleSet(default_sch_set) end # People if set_people occupancy_sch = space_type_properties['occupancy_schedule'] puts space_type_properties unless occupancy_sch.nil? default_sch_set.setNumberofPeopleSchedule(model_add_schedule(space_type.model, occupancy_sch)) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set occupancy schedule to #{occupancy_sch}.") end occupancy_activity_sch = space_type_properties['occupancy_activity_schedule'] unless occupancy_activity_sch.nil? default_sch_set.setPeopleActivityLevelSchedule(model_add_schedule(space_type.model, occupancy_activity_sch)) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set occupant activity schedule to #{occupancy_activity_sch}.") end end # Lights if set_lights lighting_sch = space_type_properties['lighting_schedule'] unless lighting_sch.nil? default_sch_set.setLightingSchedule(model_add_schedule(space_type.model, lighting_sch)) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set lighting schedule to #{lighting_sch}.") end end # Electric Equipment if set_electric_equipment elec_equip_sch = space_type_properties['electric_equipment_schedule'] unless elec_equip_sch.nil? default_sch_set.setElectricEquipmentSchedule(model_add_schedule(space_type.model, elec_equip_sch)) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set electric equipment schedule to #{elec_equip_sch}.") end end # Gas Equipment if set_gas_equipment gas_equip_sch = space_type_properties['gas_equipment_schedule'] unless gas_equip_sch.nil? default_sch_set.setGasEquipmentSchedule(model_add_schedule(space_type.model, gas_equip_sch)) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set gas equipment schedule to #{gas_equip_sch}.") end end # Infiltration if set_infiltration infiltration_sch = space_type_properties['infiltration_schedule'] unless infiltration_sch.nil? default_sch_set.setInfiltrationSchedule(model_add_schedule(space_type.model, infiltration_sch)) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set infiltration schedule to #{infiltration_sch}.") end end # Thermostat if make_thermostat thermostat = OpenStudio::Model::ThermostatSetpointDualSetpoint.new(space_type.model) thermostat.setName("#{space_type.name} Thermostat") heating_setpoint_sch = space_type_properties['heating_setpoint_schedule'] unless heating_setpoint_sch.nil? thermostat.setHeatingSetpointTemperatureSchedule(model_add_schedule(space_type.model, heating_setpoint_sch)) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set heating setpoint schedule to #{heating_setpoint_sch}.") end cooling_setpoint_sch = space_type_properties['cooling_setpoint_schedule'] unless cooling_setpoint_sch.nil? thermostat.setCoolingSetpointTemperatureSchedule(model_add_schedule(space_type.model, cooling_setpoint_sch)) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set cooling setpoint schedule to #{cooling_setpoint_sch}.") end end return true end |
#space_type_apply_internal_loads(space_type, set_people, set_lights, set_electric_equipment, set_gas_equipment, set_ventilation, set_infiltration) ⇒ Bool
Sets the selected internal loads to standards-based or typical values. For each category that is selected get all load instances. Remove all but the first instance if multiple instances. Add a new instance/definition if no instance exists. Modify the definition for the remaining instance to have the specified values. This method does not alter any loads directly assigned to spaces. This method skips plenums.
Also, assign reasonable clothing, air velocity, and work efficiency inputs to allow reasonable thermal comfort metrics to be calculated. to return air, fraction radiant, and fraction visible.
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# File 'lib/openstudio-standards/standards/Standards.SpaceType.rb', line 80 def space_type_apply_internal_loads(space_type, set_people, set_lights, set_electric_equipment, set_gas_equipment, set_ventilation, set_infiltration) # Skip plenums # Check if the space type name # contains the word plenum. if space_type.name.get.to_s.downcase.include?('plenum') return false end if space_type.standardsSpaceType.is_initialized if space_type.standardsSpaceType.get.downcase.include?('plenum') return false end end # Get the standards data space_type_properties = space_type_get_standards_data(space_type) # Need to add a check, or it'll crash on space_type_properties['occupancy_per_area'].to_f below if space_type_properties.nil? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} was not found in the standards data.") return false end # People people_have_info = false occupancy_per_area = space_type_properties['occupancy_per_area'].to_f people_have_info = true unless occupancy_per_area.zero? if set_people && people_have_info # Remove all but the first instance instances = space_type.people.sort if instances.size.zero? # Create a new definition and instance definition = OpenStudio::Model::PeopleDefinition.new(space_type.model) definition.setName("#{space_type.name} People Definition") instance = OpenStudio::Model::People.new(definition) instance.setName("#{space_type.name} People") instance.setSpaceType(space_type) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} had no people, one has been created.") instances << instance elsif instances.size > 1 instances.each_with_index do |inst, i| next if i.zero? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "Removed #{inst.name} from #{space_type.name}.") inst.remove end end # Modify the definition of the instance space_type.people.sort.each do |inst| definition = inst.peopleDefinition unless occupancy_per_area.zero? definition.setPeopleperSpaceFloorArea(OpenStudio.convert(occupancy_per_area / 1000, 'people/ft^2', 'people/m^2').get) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set occupancy to #{occupancy_per_area} people/1000 ft^2.") end # set fraction radiant ## definition.setFractionRadiant(0.3) # Clothing schedule for thermal comfort metrics clothing_sch = space_type.model.getScheduleRulesetByName('Clothing Schedule') if clothing_sch.is_initialized clothing_sch = clothing_sch.get else clothing_sch = OpenStudio::Model::ScheduleRuleset.new(space_type.model) clothing_sch.setName('Clothing Schedule') clothing_sch.defaultDaySchedule.setName('Clothing Schedule Default Winter Clothes') clothing_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 1.0) sch_rule = OpenStudio::Model::ScheduleRule.new(clothing_sch) sch_rule.daySchedule.setName('Clothing Schedule Summer Clothes') sch_rule.daySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0.5) sch_rule.setStartDate(OpenStudio::Date.new(OpenStudio::MonthOfYear.new(5), 1)) sch_rule.setEndDate(OpenStudio::Date.new(OpenStudio::MonthOfYear.new(9), 30)) end inst.setClothingInsulationSchedule(clothing_sch) # Air velocity schedule for thermal comfort metrics air_velo_sch = space_type.model.getScheduleRulesetByName('Air Velocity Schedule') if air_velo_sch.is_initialized air_velo_sch = air_velo_sch.get else air_velo_sch = OpenStudio::Model::ScheduleRuleset.new(space_type.model) air_velo_sch.setName('Air Velocity Schedule') air_velo_sch.defaultDaySchedule.setName('Air Velocity Schedule Default') air_velo_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0.2) end inst.setAirVelocitySchedule(air_velo_sch) # Work efficiency schedule for thermal comfort metrics work_efficiency_sch = space_type.model.getScheduleRulesetByName('Work Efficiency Schedule') if work_efficiency_sch.is_initialized work_efficiency_sch = work_efficiency_sch.get else work_efficiency_sch = OpenStudio::Model::ScheduleRuleset.new(space_type.model) work_efficiency_sch.setName('Work Efficiency Schedule') work_efficiency_sch.defaultDaySchedule.setName('Work Efficiency Schedule Default') work_efficiency_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0) end inst.setWorkEfficiencySchedule(work_efficiency_sch) end end # Lights lights_have_info = false lighting_per_area = space_type_properties['lighting_per_area'].to_f lighting_per_person = space_type_properties['lighting_per_person'].to_f lights_frac_to_return_air = space_type_properties['lighting_fraction_to_return_air'].to_f lights_frac_radiant = space_type_properties['lighting_fraction_radiant'].to_f lights_frac_visible = space_type_properties['lighting_fraction_visible'].to_f lights_frac_replaceable = space_type_properties['lighting_fraction_replaceable'].to_f lights_have_info = true unless lighting_per_area.zero? lights_have_info = true unless lighting_per_person.zero? if set_lights && lights_have_info # Remove all but the first instance instances = space_type.lights.sort if instances.size.zero? definition = OpenStudio::Model::LightsDefinition.new(space_type.model) definition.setName("#{space_type.name} Lights Definition") instance = OpenStudio::Model::Lights.new(definition) instance.setName("#{space_type.name} Lights") instance.setSpaceType(space_type) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} had no lights, one has been created.") instances << instance elsif instances.size > 1 instances.each_with_index do |inst, i| next if i.zero? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "Removed #{inst.name} from #{space_type.name}.") inst.remove end end # Modify the definition of the instance space_type.lights.sort.each do |inst| definition = inst.lightsDefinition unless lighting_per_area.zero? occ_sens_lpd_factor = 1.0 definition.setWattsperSpaceFloorArea(OpenStudio.convert(lighting_per_area.to_f * occ_sens_lpd_factor, 'W/ft^2', 'W/m^2').get) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set LPD to #{lighting_per_area} W/ft^2.") end unless lighting_per_person.zero? definition.setWattsperPerson(OpenStudio.convert(lighting_per_person.to_f, 'W/person', 'W/person').get) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set lighting to #{lighting_per_person} W/person.") end unless lights_frac_to_return_air.zero? definition.setReturnAirFraction(lights_frac_to_return_air) end unless lights_frac_radiant.zero? definition.setFractionRadiant(lights_frac_radiant) end unless lights_frac_visible.zero? definition.setFractionVisible(lights_frac_visible) end # unless lights_frac_replaceable.zero? # definition.setFractionReplaceable(lights_frac_replaceable) # end end # If additional lights are specified, add those too additional_lighting_per_area = space_type_properties['additional_lighting_per_area'].to_f unless additional_lighting_per_area.zero? # Create the lighting definition additional_lights_def = OpenStudio::Model::LightsDefinition.new(space_type.model) additional_lights_def.setName("#{space_type.name} Additional Lights Definition") additional_lights_def.setWattsperSpaceFloorArea(OpenStudio.convert(additional_lighting_per_area.to_f, 'W/ft^2', 'W/m^2').get) additional_lights_def.setReturnAirFraction(lights_frac_to_return_air) additional_lights_def.setFractionRadiant(lights_frac_radiant) additional_lights_def.setFractionVisible(lights_frac_visible) # Create the lighting instance and hook it up to the space type additional_lights = OpenStudio::Model::Lights.new(additional_lights_def) additional_lights.setName("#{space_type.name} Additional Lights") additional_lights.setSpaceType(space_type) end end # Electric Equipment elec_equip_have_info = false elec_equip_per_area = space_type_properties['electric_equipment_per_area'].to_f elec_equip_frac_latent = space_type_properties['electric_equipment_fraction_latent'].to_f elec_equip_frac_radiant = space_type_properties['electric_equipment_fraction_radiant'].to_f elec_equip_frac_lost = space_type_properties['electric_equipment_fraction_lost'].to_f elec_equip_have_info = true unless elec_equip_per_area.zero? if set_electric_equipment && elec_equip_have_info # Remove all but the first instance instances = space_type.electricEquipment.sort if instances.size.zero? definition = OpenStudio::Model::ElectricEquipmentDefinition.new(space_type.model) definition.setName("#{space_type.name} Elec Equip Definition") instance = OpenStudio::Model::ElectricEquipment.new(definition) instance.setName("#{space_type.name} Elec Equip") instance.setSpaceType(space_type) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} had no electric equipment, one has been created.") instances << instance elsif instances.size > 1 instances.each_with_index do |inst, i| next if i.zero? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "Removed #{inst.name} from #{space_type.name}.") inst.remove end end # Modify the definition of the instance space_type.electricEquipment.sort.each do |inst| definition = inst.electricEquipmentDefinition unless elec_equip_per_area.zero? definition.setWattsperSpaceFloorArea(OpenStudio.convert(elec_equip_per_area.to_f, 'W/ft^2', 'W/m^2').get) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set electric EPD to #{elec_equip_per_area} W/ft^2.") end unless elec_equip_frac_latent.zero? definition.setFractionLatent(elec_equip_frac_latent) end unless elec_equip_frac_radiant.zero? definition.setFractionRadiant(elec_equip_frac_radiant) end unless elec_equip_frac_lost.zero? definition.setFractionLost(elec_equip_frac_lost) end end end # Gas Equipment gas_equip_have_info = false gas_equip_per_area = space_type_properties['gas_equipment_per_area'].to_f gas_equip_frac_latent = space_type_properties['gas_equipment_fraction_latent'].to_f gas_equip_frac_radiant = space_type_properties['gas_equipment_fraction_radiant'].to_f gas_equip_frac_lost = space_type_properties['gas_equipment_fraction_lost'].to_f gas_equip_have_info = true unless gas_equip_per_area.zero? if set_gas_equipment && gas_equip_have_info # Remove all but the first instance instances = space_type.gasEquipment.sort if instances.size.zero? definition = OpenStudio::Model::GasEquipmentDefinition.new(space_type.model) definition.setName("#{space_type.name} Gas Equip Definition") instance = OpenStudio::Model::GasEquipment.new(definition) instance.setName("#{space_type.name} Gas Equip") instance.setSpaceType(space_type) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} had no gas equipment, one has been created.") instances << instance elsif instances.size > 1 instances.each_with_index do |inst, i| next if i.zero? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "Removed #{inst.name} from #{space_type.name}.") inst.remove end end # Modify the definition of the instance space_type.gasEquipment.sort.each do |inst| definition = inst.gasEquipmentDefinition unless gas_equip_per_area.zero? definition.setWattsperSpaceFloorArea(OpenStudio.convert(gas_equip_per_area.to_f, 'Btu/hr*ft^2', 'W/m^2').get) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set gas EPD to #{gas_equip_per_area} Btu/hr*ft^2.") end unless gas_equip_frac_latent.zero? definition.setFractionLatent(gas_equip_frac_latent) end unless gas_equip_frac_radiant.zero? definition.setFractionRadiant(gas_equip_frac_radiant) end unless gas_equip_frac_lost.zero? definition.setFractionLost(gas_equip_frac_lost) end end end # Ventilation ventilation_have_info = false ventilation_per_area = space_type_properties['ventilation_per_area'].to_f ventilation_per_person = space_type_properties['ventilation_per_person'].to_f ventilation_ach = space_type_properties['ventilation_air_changes'].to_f ventilation_have_info = true unless ventilation_per_area.zero? ventilation_have_info = true unless ventilation_per_person.zero? ventilation_have_info = true unless ventilation_ach.zero? # Get the design OA or create a new one if none exists ventilation = space_type.designSpecificationOutdoorAir if ventilation.is_initialized ventilation = ventilation.get else ventilation = OpenStudio::Model::DesignSpecificationOutdoorAir.new(space_type.model) ventilation.setName("#{space_type.name} Ventilation") space_type.setDesignSpecificationOutdoorAir(ventilation) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} had no ventilation specification, one has been created.") end if set_ventilation && ventilation_have_info # Modify the ventilation properties ventilation.setOutdoorAirMethod('Sum') unless ventilation_per_area.zero? ventilation.setOutdoorAirFlowperFloorArea(OpenStudio.convert(ventilation_per_area.to_f, 'ft^3/min*ft^2', 'm^3/s*m^2').get) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set ventilation per area to #{ventilation_per_area} cfm/ft^2.") end unless ventilation_per_person.zero? ventilation.setOutdoorAirFlowperPerson(OpenStudio.convert(ventilation_per_person.to_f, 'ft^3/min*person', 'm^3/s*person').get) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set ventilation per person to #{ventilation_per_person} cfm/person.") end unless ventilation_ach.zero? ventilation.setOutdoorAirFlowAirChangesperHour(ventilation_ach) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set ventilation to #{ventilation_ach} ACH.") end elsif set_ventilation && !ventilation_have_info # All space types must have a design spec OA # object for ventilation controls to work correctly, # even if the values are all zero. ventilation.setOutdoorAirFlowperFloorArea(0) ventilation.setOutdoorAirFlowperPerson(0) ventilation.setOutdoorAirFlowAirChangesperHour(0) end # Infiltration infiltration_have_info = false infiltration_per_area_ext = space_type_properties['infiltration_per_exterior_area'].to_f infiltration_per_area_ext_wall = space_type_properties['infiltration_per_exterior_wall_area'].to_f infiltration_ach = space_type_properties['infiltration_air_changes'].to_f unless infiltration_per_area_ext.zero? && infiltration_per_area_ext_wall.zero? && infiltration_ach.zero? infiltration_have_info = true end if set_infiltration && infiltration_have_info # Remove all but the first instance instances = space_type.spaceInfiltrationDesignFlowRates.sort if instances.size.zero? instance = OpenStudio::Model::SpaceInfiltrationDesignFlowRate.new(space_type.model) instance.setName("#{space_type.name} Infiltration") instance.setSpaceType(space_type) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} had no infiltration objects, one has been created.") instances << instance elsif instances.size > 1 instances.each_with_index do |inst, i| next if i.zero? OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "Removed #{inst.name} from #{space_type.name}.") inst.remove end end # Modify each instance space_type.spaceInfiltrationDesignFlowRates.sort.each do |inst| unless infiltration_per_area_ext.zero? inst.setFlowperExteriorSurfaceArea(OpenStudio.convert(infiltration_per_area_ext.to_f, 'ft^3/min*ft^2', 'm^3/s*m^2').get) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set infiltration to #{ventilation_ach} per ft^2 exterior surface area.") end unless infiltration_per_area_ext_wall.zero? inst.setFlowperExteriorWallArea(OpenStudio.convert(infiltration_per_area_ext_wall.to_f, 'ft^3/min*ft^2', 'm^3/s*m^2').get) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set infiltration to #{infiltration_per_area_ext_wall} per ft^2 exterior wall area.") end unless infiltration_ach.zero? inst.setAirChangesperHour(infiltration_ach) OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.SpaceType', "#{space_type.name} set infiltration to #{ventilation_ach} ACH.") end end end end |
#space_type_apply_rendering_color(space_type) ⇒ Bool
Sets the color for the space types as shown in the SketchUp plugin using render by space type.
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# File 'lib/openstudio-standards/standards/Standards.SpaceType.rb', line 39 def space_type_apply_rendering_color(space_type) # Get the standards data space_type_properties = space_type_get_standards_data(space_type) # Set the rendering color of the space type rgb = space_type_properties['rgb'] if rgb.nil? return false end rgb = rgb.split('_') r = rgb[0].to_i g = rgb[1].to_i b = rgb[2].to_i rendering_color = OpenStudio::Model::RenderingColor.new(space_type.model) rendering_color.setName(space_type.name.get) rendering_color.setRenderingRedValue(r) rendering_color.setRenderingGreenValue(g) rendering_color.setRenderingBlueValue(b) space_type.setRenderingColor(rendering_color) return true end |
#space_type_get_construction_properties(space_type, intended_surface_type, standards_construction_type) ⇒ hash
Returns standards data for selected construction
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# File 'lib/openstudio-standards/standards/Standards.SpaceType.rb', line 568 def space_type_get_construction_properties(space_type, intended_surface_type, standards_construction_type) # get building_category value building_category = if !space_type_get_standards_data(space_type).nil? && space_type_get_standards_data(space_type)['is_residential'] == 'Yes' 'Residential' else 'Nonresidential' end # get climate_zone_set climate_zone = model_get_building_climate_zone_and_building_type(space_type.model)['climate_zone'] climate_zone_set = model_find_climate_zone_set(space_type.model, climate_zone) # populate search hash search_criteria = { 'template' => template, 'climate_zone_set' => climate_zone_set, 'intended_surface_type' => intended_surface_type, 'standards_construction_type' => standards_construction_type, 'building_category' => building_category } # switch to use this but update test in standards and measures to load this outside of the method construction_properties = model_find_object(standards_data['construction_properties'], search_criteria) return construction_properties end |
#space_type_get_standards_data(space_type) ⇒ hash
Returns standards data for selected space type and template
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# File 'lib/openstudio-standards/standards/Standards.SpaceType.rb', line 8 def space_type_get_standards_data(space_type) standards_building_type = if space_type.standardsBuildingType.is_initialized space_type.standardsBuildingType.get end standards_space_type = if space_type.standardsSpaceType.is_initialized space_type.standardsSpaceType.get end # populate search hash search_criteria = { 'template' => template, 'building_type' => standards_building_type, 'space_type' => standards_space_type } # lookup space type properties space_type_properties = model_find_object(standards_data['space_types'], search_criteria) if space_type_properties.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.SpaceType', "Space type properties lookup failed: #{search_criteria}.") space_type_properties = {} end return space_type_properties end |
#strip_model(model) ⇒ Object
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 35 def strip_model(model) # remove all materials model.getMaterials.each(&:remove) # remove all constructions model.getConstructions.each(&:remove) # remove performance curves model.getCurves.each(&:remove) # remove all zone equipment model.getThermalZones.sort.each do |zone| zone.equipment.each(&:remove) end # remove all thermostats model.getThermostatSetpointDualSetpoints.each(&:remove) # remove all people model.getPeoples.each(&:remove) model.getPeopleDefinitions.each(&:remove) # remove all lights model.getLightss.each(&:remove) model.getLightsDefinitions.each(&:remove) # remove all electric equipment model.getElectricEquipments.each(&:remove) model.getElectricEquipmentDefinitions.each(&:remove) # remove all gas equipment model.getGasEquipments.each(&:remove) model.getGasEquipmentDefinitions.each(&:remove) # remove all outdoor air model.getDesignSpecificationOutdoorAirs.each(&:remove) # remove all infiltration model.getSpaceInfiltrationDesignFlowRates.each(&:remove) # Remove all internal mass model.getInternalMasss.each(&:remove) # Remove all internal mass defs model.getInternalMassDefinitions.each(&:remove) # Remove all thermal zones model.getThermalZones.each(&:remove) # Remove all schedules model.getSchedules.each(&:remove) # Remove all schedule type limits model.getScheduleTypeLimitss.each(&:remove) # Remove the sizing parameters model.getSizingParameters.remove # Remove the design days model.getDesignDays.each(&:remove) # Remove the rendering colors model.getRenderingColors.each(&:remove) # Remove the daylight controls model.getDaylightingControls.each(&:remove) return model end |
#sub_surface_component_infiltration_rate(sub_surface, type) ⇒ Double
Determine the component infiltration rate for this surface
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# File 'lib/openstudio-standards/standards/Standards.SubSurface.rb', line 9 def sub_surface_component_infiltration_rate(sub_surface, type) comp_infil_rate_m3_per_s = 0.0 # Define the envelope component infiltration rates component_infil_rates_cfm_per_ft2 = { 'baseline' => { 'opaque_door' => 0.40, 'loading_dock_door' => 0.40, 'swinging_or_revolving_glass_door' => 1.0, 'vestibule' => 1.0, 'sliding_glass_door' => 0.40, 'window' => 0.40, 'skylight' => 0.40 }, 'advanced' => { 'opaque_door' => 0.20, 'loading_dock_door' => 0.20, 'swinging_or_revolving_glass_door' => 1.0, 'vestibule' => 1.0, 'sliding_glass_door' => 0.20, 'window' => 0.20, 'skylight' => 0.20 } } boundary_condition = sub_surface.outsideBoundaryCondition # Skip non-outdoor surfaces return comp_infil_rate_m3_per_s unless outsideBoundaryCondition == 'Outdoors' || sub_surface.outsideBoundaryCondition == 'Ground' # Per area infiltration rate for this surface surface_type = sub_surface.subSurfaceType infil_rate_cfm_per_ft2 = nil case boundary_condition when 'Outdoors' case surface_type when 'Door' infil_rate_cfm_per_ft2 = component_infil_rates_cfm_per_ft2[type]['opaque_door'] when 'OverheadDoor' infil_rate_cfm_per_ft2 = component_infil_rates_cfm_per_ft2[type]['loading_dock_door'] when 'GlassDoor' OpenStudio.logFree(OpenStudio::Info, 'openstudio.Standards.Model', "For #{sub_surface.name}, assuming swinging_or_revolving_glass_door for infiltration calculation.") infil_rate_cfm_per_ft2 = component_infil_rates_cfm_per_ft2[type]['swinging_or_revolving_glass_door'] when 'FixedWindow', 'OperableWindow' infil_rate_cfm_per_ft2 = component_infil_rates_cfm_per_ft2[type]['window'] when 'Skylight', 'TubularDaylightDome', 'TubularDaylightDiffuser' infil_rate_cfm_per_ft2 = component_infil_rates_cfm_per_ft2[type]['skylight'] end end if infil_rate_cfm_per_ft2.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Standards.Model', "For #{sub_surface.name}, could not determine surface type for infiltration, will not be included in calculation.") return comp_infil_rate_m3_per_s end # Area of the surface area_m2 = sub_surface.netArea area_ft2 = OpenStudio.convert(area_m2, 'm^2', 'ft^2').get # Rate for this surface comp_infil_rate_cfm = area_ft2 * infil_rate_cfm_per_ft2 comp_infil_rate_m3_per_s = OpenStudio.convert(comp_infil_rate_cfm, 'cfm', 'm^3/s').get # OpenStudio::logFree(OpenStudio::Debug, "openstudio.Standards.Model", "......#{self.name}, infil = #{comp_infil_rate_cfm.round(2)} cfm @ rate = #{infil_rate_cfm_per_ft2} cfm/ft2, area = #{area_ft2.round} ft2.") return comp_infil_rate_m3_per_s end |
#sub_surface_reduce_area_by_percent_by_raising_sill(sub_surface, percent_reduction) ⇒ Object
Reduce the area of the subsurface by raising the sill height.
to reduce the area.
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# File 'lib/openstudio-standards/standards/Standards.SubSurface.rb', line 116 def sub_surface_reduce_area_by_percent_by_raising_sill(sub_surface, percent_reduction) mult = 1 - percent_reduction # Calculate the original area area_original = sub_surface.netArea # Find the min and max z values min_z_val = 99_999 max_z_val = -99_999 sub_surface.vertices.each do |vertex| # Min z value if vertex.z < min_z_val min_z_val = vertex.z end # Max z value if vertex.z > max_z_val max_z_val = vertex.z end end # Calculate the window height height = max_z_val - min_z_val # Calculate the new sill height new_sill_z = max_z_val - (height * mult) # Reset the z value of the lowest points new_vertices = [] sub_surface.vertices.each do |vertex| new_x = vertex.x new_y = vertex.y new_z = vertex.z if new_z == min_z_val new_z = new_sill_z end new_vertices << OpenStudio::Point3d.new(new_x, new_y, new_z) end # Reset the vertices sub_surface.setVertices(new_vertices) return true end |
#sub_surface_reduce_area_by_percent_by_shrinking_toward_centroid(sub_surface, percent_reduction) ⇒ Object
Reduce the area of the subsurface by shrinking it toward the centroid. to reduce the area.
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# File 'lib/openstudio-standards/standards/Standards.SubSurface.rb', line 82 def sub_surface_reduce_area_by_percent_by_shrinking_toward_centroid(sub_surface, percent_reduction) mult = 1 - percent_reduction scale_factor = mult**0.5 # Get the centroid (Point3d) g = sub_surface.centroid # Create an array to collect the new vertices new_vertices = [] # Loop on vertices (Point3ds) sub_surface.vertices.each do |vertex| # Point3d - Point3d = Vector3d # Vector from centroid to vertex (GA, GB, GC, etc) centroid_vector = vertex - g # Resize the vector (done in place) according to scale_factor centroid_vector.setLength(centroid_vector.length * scale_factor) # Move the vertex toward the centroid vertex = g + centroid_vector new_vertices << vertex end # Assign the new vertices to the self sub_surface.setVertices(new_vertices) end |
#sub_surface_vertical_rectangle?(sub_surface) ⇒ Boolean
Determine if the sub surface is a vertical rectangle, meaning a rectangle where the bottom is parallel to the ground.
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# File 'lib/openstudio-standards/standards/Standards.SubSurface.rb', line 162 def sub_surface_vertical_rectangle?(sub_surface) # Get the vertices once verts = sub_surface.vertices # Check for 4 vertices return false unless verts.size == 4 # Check if the 2 lowest z-values # are the same z_vals = [] verts.each do |vertex| z_vals << vertex.z end z_vals = z_vals.sort return false unless z_vals[0] == z_vals[1] # Check if the diagonals are equal length diag_a = verts[0] - verts[2] diag_b = verts[1] - verts[3] return false unless diag_a.length == diag_b.length # If here, we have a rectangle return true end |
#surface_component_infiltration_rate(surface, type) ⇒ Double
handle floors over unconditioned spaces
Determine the component infiltration rate for this surface
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# File 'lib/openstudio-standards/standards/Standards.Surface.rb', line 10 def surface_component_infiltration_rate(surface, type) comp_infil_rate_m3_per_s = 0.0 # Define the envelope component infiltration rates component_infil_rates_cfm_per_ft2 = { 'baseline' => { 'roof' => 0.12, 'exterior_wall' => 0.12, 'below_grade_wall' => 0.12, 'floor_over_unconditioned' => 0.12, 'slab_on_grade' => 0.12 }, 'advanced' => { 'roof' => 0.04, 'exterior_wall' => 0.04, 'below_grade_wall' => 0.04, 'floor_over_unconditioned' => 0.04, 'slab_on_grade' => 0.04 } } boundary_condition = surface.outsideBoundaryCondition # Skip non-outdoor surfaces return comp_infil_rate_m3_per_s unless outsideBoundaryCondition == 'Outdoors' || surface.outsideBoundaryCondition == 'Ground' # Per area infiltration rate for this surface surface_type = surface.surfaceType infil_rate_cfm_per_ft2 = nil case boundary_condition when 'Outdoors' case surface_type when 'RoofCeiling' infil_rate_cfm_per_ft2 = component_infil_rates_cfm_per_ft2[type]['roof'] when 'Wall' infil_rate_cfm_per_ft2 = component_infil_rates_cfm_per_ft2[type]['exterior_wall'] end when 'Ground' case surface_type when 'Wall' infil_rate_cfm_per_ft2 = component_infil_rates_cfm_per_ft2[type]['below_grade_wall'] when 'Floor' infil_rate_cfm_per_ft2 = component_infil_rates_cfm_per_ft2[type]['slab_on_grade'] end when 'TODO Surface' case surface_type when 'Floor' infil_rate_cfm_per_ft2 = component_infil_rates_cfm_per_ft2[type]['floor_over_unconditioned'] end end if infil_rate_cfm_per_ft2.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Standards.Model', "For #{surface.name}, could not determine surface type for infiltration, will not be included in calculation.") return comp_infil_rate_m3_per_s end # Area of the surface area_m2 = surface.netArea area_ft2 = OpenStudio.convert(area_m2, 'm^2', 'ft^2').get # Rate for this surface comp_infil_rate_cfm = area_ft2 * infil_rate_cfm_per_ft2 comp_infil_rate_m3_per_s = OpenStudio.convert(comp_infil_rate_cfm, 'cfm', 'm^3/s').get # OpenStudio::logFree(OpenStudio::Debug, "openstudio.Standards.Model", "...#{self.name}, infil = #{comp_infil_rate_cfm.round(2)} cfm @ rate = #{infil_rate_cfm_per_ft2} cfm/ft2, area = #{area_ft2.round} ft2.") return comp_infil_rate_m3_per_s end |
#thermal_eff_to_afue(teff) ⇒ Double
A helper method to convert from thermal efficiency to AFUE
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 268 def thermal_eff_to_afue(teff) return teff end |
#thermal_eff_to_comb_eff(thermal_eff) ⇒ Double
A helper method to convert from thermal efficiency to combustion efficiency
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# File 'lib/openstudio-standards/prototypes/common/objects/Prototype.utilities.rb', line 286 def thermal_eff_to_comb_eff(thermal_eff) return thermal_eff + 0.007 end |
#thermal_zone_add_exhaust(thermal_zone, exhaust_makeup_inputs = {}) ⇒ Hash
-
Combine availability and fraction flow schedule to make zone mixing schedule
Add Exhaust Fans based on space type lookup This measure doesn’t look if DCV is needed. Others methods can check if DCV needed and add it
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1402 def thermal_zone_add_exhaust(thermal_zone, exhaust_makeup_inputs = {}) exhaust_fans = {} # key is primary exhaust value is hash of arrays of secondary objects # hash to store space type information space_type_hash = {} # key is space type value is floor_area_si # get space type ratio for spaces in zone, making more than one exhaust fan if necessary thermal_zone.spaces.each do |space| next unless space.spaceType.is_initialized next unless space.partofTotalFloorArea space_type = space.spaceType.get if space_type_hash.key?(space_type) space_type_hash[space_type] += space.floorArea # excluding space.multiplier since used to calc loads in zone else next unless space_type.standardsBuildingType.is_initialized next unless space_type.standardsSpaceType.is_initialized space_type_hash[space_type] = space.floorArea # excluding space.multiplier since used to calc loads in zone end end # loop through space type hash and add exhaust as needed space_type_hash.each do |space_type, floor_area| # get floor custom or calculated floor area for max flow rate calculation makeup_target = [space_type.standardsBuildingType.get, space_type.standardsSpaceType.get] if exhaust_makeup_inputs.key?(makeup_target) && exhaust_makeup_inputs[makeup_target].key?(:target_effective_floor_area) # pass in custom floor area floor_area_si = exhaust_makeup_inputs[makeup_target][:target_effective_floor_area] / thermal_zone.multiplier.to_f floor_area_ip = OpenStudio.convert(floor_area_si, 'm^2', 'ft^2').get else floor_area_ip = OpenStudio.convert(floor_area, 'm^2', 'ft^2').get end space_type_properties = space_type_get_standards_data(space_type) exhaust_per_area = space_type_properties['exhaust_per_area'] next if exhaust_per_area.nil? maximum_flow_rate_ip = exhaust_per_area * floor_area_ip maximum_flow_rate_si = OpenStudio.convert(maximum_flow_rate_ip, 'cfm', 'm^3/s').get if space_type_properties['exhaust_schedule'].nil? exhaust_schedule = thermal_zone.model.alwaysOnDiscreteSchedule else sch_name = space_type_properties['exhaust_schedule'] exhaust_schedule = model_add_schedule(thermal_zone.model, sch_name) unless exhaust_schedule OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Standards.ThermalZone', "Could not find an exhaust schedule called #{sch_name}, exhaust fans will run continuously.") exhaust_schedule = thermal_zone.model.alwaysOnDiscreteSchedule end end # add exhaust fans zone_exhaust_fan = OpenStudio::Model::FanZoneExhaust.new(thermal_zone.model) zone_exhaust_fan.setName(thermal_zone.name.to_s + ' Exhaust Fan') zone_exhaust_fan.setAvailabilitySchedule(exhaust_schedule) # not using zone_exhaust_fan.setFlowFractionSchedule. Exhaust fans are on when available zone_exhaust_fan.setMaximumFlowRate(maximum_flow_rate_si) zone_exhaust_fan.setEndUseSubcategory('Zone Exhaust Fans') zone_exhaust_fan.addToThermalZone(thermal_zone) exhaust_fans[zone_exhaust_fan] = {} # keys are :zone_mixing and :transfer_air_source_zone_exhaust # set fan pressure rise fan_zone_exhaust_apply_prototype_fan_pressure_rise(zone_exhaust_fan) # update efficiency and pressure rise prototype_fan_apply_prototype_fan_efficiency(zone_exhaust_fan) # add and alter objectxs related to zone exhaust makeup air if exhaust_makeup_inputs.key?(makeup_target) && exhaust_makeup_inputs[makeup_target][:source_zone] # add balanced schedule to zone_exhaust_fan balanced_sch_name = space_type_properties['balanced_exhaust_fraction_schedule'] balanced_exhaust_schedule = model_add_schedule(thermal_zone.model, balanced_sch_name).to_ScheduleRuleset.get zone_exhaust_fan.setBalancedExhaustFractionSchedule(balanced_exhaust_schedule) # use max value of balanced exhaust fraction schedule for maximum flow rate max_sch_val = schedule_ruleset_annual_min_max_value(balanced_exhaust_schedule)['max'] transfer_air_zone_mixing_si = maximum_flow_rate_si * max_sch_val # add dummy exhaust fan to a transfer_air_source_zones transfer_air_source_zone_exhaust = OpenStudio::Model::FanZoneExhaust.new(thermal_zone.model) transfer_air_source_zone_exhaust.setName(thermal_zone.name.to_s + ' Transfer Air Source') transfer_air_source_zone_exhaust.setAvailabilitySchedule(exhaust_schedule) # not using zone_exhaust_fan.setFlowFractionSchedule. Exhaust fans are on when available transfer_air_source_zone_exhaust.setMaximumFlowRate(transfer_air_zone_mixing_si) transfer_air_source_zone_exhaust.setFanEfficiency(1.0) transfer_air_source_zone_exhaust.setPressureRise(0.0) transfer_air_source_zone_exhaust.setEndUseSubcategory('Zone Exhaust Fans') transfer_air_source_zone_exhaust.addToThermalZone(exhaust_makeup_inputs[makeup_target][:source_zone]) exhaust_fans[zone_exhaust_fan][:transfer_air_source_zone_exhaust] = transfer_air_source_zone_exhaust # TODO: - make zone mixing schedule by combining exhaust availability and fraction flow zone_mixing_schedule = exhaust_schedule # add zone mixing zone_mixing = OpenStudio::Model::ZoneMixing.new(thermal_zone) zone_mixing.setSchedule(zone_mixing_schedule) zone_mixing.setSourceZone(exhaust_makeup_inputs[makeup_target][:source_zone]) zone_mixing.setDesignFlowRate(transfer_air_zone_mixing_si) exhaust_fans[zone_exhaust_fan][:zone_mixing] = zone_mixing end end return exhaust_fans end |
#thermal_zone_add_exhaust_fan_dcv(thermal_zone, change_related_objects = true, zone_mixing_objects = [], transfer_air_source_zones = []) ⇒ Bool
Add DCV to exhaust fan and if requsted to related objects
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1536 def thermal_zone_add_exhaust_fan_dcv(thermal_zone, = true, zone_mixing_objects = [], transfer_air_source_zones = []) # set flow fraction schedule for all zone exhaust fans and then set zone mixing schedule to the intersection of exhaust avaialability and exhaust fractional schedule # are there associated zone mixing or dummy exhaust objects that need to change when this changes? # How are these ojects identifed? # If this is run directly after thermal_zone_add_exhaust(thermal_zone) it will return a hash where each key is an exhaust object and hash is a hash of related zone mizing and dummy exhaust from the source zone end |
#thermal_zone_add_unconditioned_thermostat(thermal_zone) ⇒ Object
Adds a thermostat that heats the space to 0 F and cools to 120 F. These numbers are outside of the threshold that is considered heated or cooled by thermal_zone_cooled?() and thermal_zone_heated?()
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1237 def thermal_zone_add_unconditioned_thermostat(thermal_zone) # Heated to 0F (below thermal_zone_heated?(thermal_zone) threshold) htg_t_f = 0 htg_t_c = OpenStudio.convert(htg_t_f, 'F', 'C').get htg_stpt_sch = OpenStudio::Model::ScheduleRuleset.new(thermal_zone.model) htg_stpt_sch.setName('Unconditioned Minimal Heating') htg_stpt_sch.defaultDaySchedule.setName('Unconditioned Minimal Heating Default') htg_stpt_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), htg_t_c) # Cooled to 120F (above thermal_zone_cooled?(thermal_zone) threshold) clg_t_f = 120 clg_t_c = OpenStudio.convert(clg_t_f, 'F', 'C').get clg_stpt_sch = OpenStudio::Model::ScheduleRuleset.new(thermal_zone.model) clg_stpt_sch.setName('Unconditioned Minimal Heating') clg_stpt_sch.defaultDaySchedule.setName('Unconditioned Minimal Heating Default') clg_stpt_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), clg_t_c) # Thermostat thermostat = OpenStudio::Model::ThermostatSetpointDualSetpoint.new(thermal_zone.model) thermostat.setName("#{thermal_zone.name} Unconditioned Thermostat") thermostat.setHeatingSetpointTemperatureSchedule(htg_stpt_sch) thermostat.setCoolingSetpointTemperatureSchedule(clg_stpt_sch) return true end |
#thermal_zone_apply_prm_baseline_supply_temperatures(thermal_zone) ⇒ Bool
Set the design delta-T for zone heating and cooling sizing supply air temperatures. This value determines zone air flows, which will be summed during system design airflow calculation.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1210 def thermal_zone_apply_prm_baseline_supply_temperatures(thermal_zone) # Skip spaces that aren't heated or cooled return true unless thermal_zone_heated?(thermal_zone) || thermal_zone_cooled?(thermal_zone) # Heating htg_sat_c = thermal_zone_prm_baseline_heating_design_supply_temperature(thermal_zone) htg_success = thermal_zone.sizingZone.setZoneHeatingDesignSupplyAirTemperature(htg_sat_c) # Cooling clg_sat_c = thermal_zone_prm_baseline_cooling_design_supply_temperature(thermal_zone) clg_success = thermal_zone.sizingZone.setZoneCoolingDesignSupplyAirTemperature(clg_sat_c) htg_sat_f = OpenStudio.convert(htg_sat_c, 'C', 'F').get clg_sat_f = OpenStudio.convert(clg_sat_c, 'C', 'F').get OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "For #{thermal_zone.name}, Htg SAT = #{htg_sat_f.round(1)}F, Clg SAT = #{clg_sat_f.round(1)}F.") result = false if htg_success && clg_success result = true end return result end |
#thermal_zone_conditioning_category(thermal_zone, climate_zone) ⇒ String
add logic to detect indirectly-conditioned spaces
Determines whether the zone is conditioned per 90.1, which is based on heating and cooling loads.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1009 def thermal_zone_conditioning_category(thermal_zone, climate_zone) # Get the heating load htg_load_btu_per_ft2 = 0.0 htg_load_w_per_m2 = thermal_zone.heatingDesignLoad if htg_load_w_per_m2.is_initialized htg_load_btu_per_ft2 = OpenStudio.convert(htg_load_w_per_m2.get, 'W/m^2', 'Btu/hr*ft^2').get end # Get the cooling load clg_load_btu_per_ft2 = 0.0 clg_load_w_per_m2 = thermal_zone.coolingDesignLoad if clg_load_w_per_m2.is_initialized clg_load_btu_per_ft2 = OpenStudio.convert(clg_load_w_per_m2.get, 'W/m^2', 'Btu/hr*ft^2').get end # Determine the heating limit based on climate zone # From Table 3.1 Heated Space Criteria htg_lim_btu_per_ft2 = 0.0 case climate_zone when 'ASHRAE 169-2006-1A', 'ASHRAE 169-2006-1B', 'ASHRAE 169-2006-2A', 'ASHRAE 169-2006-2B' htg_lim_btu_per_ft2 = 5 when 'ASHRAE 169-2006-3A', 'ASHRAE 169-2006-3B', 'ASHRAE 169-2006-3C' htg_lim_btu_per_ft2 = 10 when 'ASHRAE 169-2006-4A', 'ASHRAE 169-2006-4B', 'ASHRAE 169-2006-4C', 'ASHRAE 169-2006-5A', 'ASHRAE 169-2006-5B', 'ASHRAE 169-2006-5C', htg_lim_btu_per_ft2 = 15 when 'ASHRAE 169-2006-6A', 'ASHRAE 169-2006-6B', 'ASHRAE 169-2006-7A', 'ASHRAE 169-2006-7B', htg_lim_btu_per_ft2 = 20 when 'ASHRAE 169-2006-8A', 'ASHRAE 169-2006-8B' htg_lim_btu_per_ft2 = 25 end # Cooling limit is climate-independent clg_lim_btu_per_ft2 = 5 # Semiheated limit is climate-independent semihtd_lim_btu_per_ft2 = 3.4 # Determine if residential res = false if thermal_zone_residential?(thermal_zone) res = true end cond_cat = 'Unconditioned' if htg_load_btu_per_ft2 > htg_lim_btu_per_ft2 OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "Zone #{thermal_zone.name} is conditioned because heating load of #{htg_load_btu_per_ft2.round} Btu/hr*ft^2 exceeds minimum of #{htg_lim_btu_per_ft2.round} Btu/hr*ft^2.") cond_cat = if res 'ResConditioned' else 'NonResConditioned' end elsif clg_load_btu_per_ft2 > clg_lim_btu_per_ft2 OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "Zone #{thermal_zone.name} is conditioned because cooling load of #{clg_load_btu_per_ft2.round} Btu/hr*ft^2 exceeds minimum of #{clg_lim_btu_per_ft2.round} Btu/hr*ft^2.") cond_cat = if res 'ResConditioned' else 'NonResConditioned' end elsif htg_load_btu_per_ft2 > semihtd_lim_btu_per_ft2 cond_cat = 'Semiheated' OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "Zone #{thermal_zone.name} is semiheated because heating load of #{htg_load_btu_per_ft2.round} Btu/hr*ft^2 exceeds minimum of #{semihtd_lim_btu_per_ft2.round} Btu/hr*ft^2.") end return cond_cat end |
#thermal_zone_convert_oa_req_to_per_area(thermal_zone) ⇒ Bool
Convert total minimum OA requirement to a per-area value.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 100 def thermal_zone_convert_oa_req_to_per_area(thermal_zone) # For each space in the zone, convert # all design OA to per-area thermal_zone.spaces.each do |space| dsn_oa = space.designSpecificationOutdoorAir next if dsn_oa.empty? dsn_oa = dsn_oa.get # Get the space properties floor_area = space.floorArea number_of_people = space.numberOfPeople volume = space.volume # Sum up the total OA from all sources oa_for_people = number_of_people * dsn_oa.outdoorAirFlowperPerson oa_for_floor_area = floor_area * dsn_oa.outdoorAirFlowperFloorArea oa_rate = dsn_oa.outdoorAirFlowRate oa_for_volume = volume * dsn_oa.outdoorAirFlowAirChangesperHour / 3600 tot_oa = oa_for_people + oa_for_floor_area + oa_rate + oa_for_volume # Convert total to per-area tot_oa_per_area = tot_oa / floor_area # Set the per-area requirement dsn_oa.setOutdoorAirFlowperFloorArea(tot_oa_per_area) # Zero-out the per-person, ACH, and flow requirements dsn_oa.setOutdoorAirFlowperPerson(0.0) dsn_oa.setOutdoorAirFlowAirChangesperHour(0.0) dsn_oa.setOutdoorAirFlowRate(0.0) end return true end |
#thermal_zone_cooled?(thermal_zone) ⇒ Bool
Determines cooling status. If the zone has a thermostat with a minimum cooling setpoint below 33C (91F), counts as cooled. Plenums are also assumed to be cooled.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 851 def thermal_zone_cooled?(thermal_zone) temp_f = 91 temp_c = OpenStudio.convert(temp_f, 'F', 'C').get cld = false # Consider plenum zones cooled area_plenum = 0 area_non_plenum = 0 thermal_zone.spaces.each do |space| if space_plenum?(space) area_plenum += space.floorArea else area_non_plenum += space.floorArea end end # Majority if area_plenum > area_non_plenum cld = true return cld end # Check if the zone has radiant cooling, # and if it does, get cooling setpoint schedule # directly from the radiant system to check. thermal_zone.equipment.each do |equip| clg_sch = nil if equip.to_ZoneHVACLowTempRadiantConstFlow.is_initialized equip = equip.to_ZoneHVACLowTempRadiantConstFlow.get clg_coil = equip.heatingCoil if clg_coil.to_CoilCoolingLowTempRadiantConstFlow.is_initialized clg_coil = clg_coil.to_CoilCoolingLowTempRadiantConstFlow.get if clg_coil.coolingLowControlTemperatureSchedule.is_initialized clg_sch = clg_coil.coolingLowControlTemperatureSchedule.get end end elsif equip.to_ZoneHVACLowTempRadiantVarFlow.is_initialized equip = equip.to_ZoneHVACLowTempRadiantVarFlow.get clg_coil = equip.heatingCoil if clg_coil.to_CoilCoolingLowTempRadiantVarFlow.is_initialized clg_coil = clg_coil.to_CoilCoolingLowTempRadiantVarFlow.get if clg_coil.coolingControlTemperatureSchedule.is_initialized clg_sch = clg_coil.coolingControlTemperatureSchedule.get end end end # Move on if no cooling schedule was found next if clg_sch.nil? # Get the setpoint from the schedule if clg_sch.to_ScheduleRuleset.is_initialized clg_sch = clg_sch.to_ScheduleRuleset.get min_c = schedule_ruleset_annual_min_max_value(clg_sch)['min'] if min_c < temp_c cld = true end elsif clg_sch.to_ScheduleConstant.is_initialized clg_sch = clg_sch.to_ScheduleConstant.get min_c = schedule_constant_annual_min_max_value(clg_sch)['min'] if min_c < temp_c cld = true end elsif clg_sch.to_ScheduleCompact.is_initialized clg_sch = clg_sch.to_ScheduleCompact.get min_c = schedule_compact_annual_min_max_value(clg_sch)['min'] if min_c < temp_c cld = true end else OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "Zone #{thermal_zone.name} used an unknown schedule type for the cooling setpoint; assuming cooled.") cld = true end end # Unheated if no thermostat present if thermal_zone.thermostat.empty? return cld end # Check the cooling setpoint tstat = thermal_zone.thermostat.get if tstat.to_ThermostatSetpointDualSetpoint tstat = tstat.to_ThermostatSetpointDualSetpoint.get clg_sch = tstat.getCoolingSchedule if clg_sch.is_initialized clg_sch = clg_sch.get if clg_sch.to_ScheduleRuleset.is_initialized clg_sch = clg_sch.to_ScheduleRuleset.get min_c = schedule_ruleset_annual_min_max_value(clg_sch)['min'] if min_c < temp_c cld = true end elsif clg_sch.to_ScheduleConstant.is_initialized clg_sch = clg_sch.to_ScheduleConstant.get min_c = schedule_constant_annual_min_max_value(clg_sch)['min'] if min_c < temp_c cld = true end elsif clg_sch.to_ScheduleCompact.is_initialized clg_sch = clg_sch.to_ScheduleCompact.get min_c = schedule_compact_annual_min_max_value(clg_sch)['min'] if min_c < temp_c cld = true end else OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "Zone #{thermal_zone.name} used an unknown schedule type for the cooling setpoint; assuming cooled.") cld = true end end elsif tstat.to_ZoneControlThermostatStagedDualSetpoint tstat = tstat.to_ZoneControlThermostatStagedDualSetpoint.get clg_sch = tstat.coolingTemperatureSetpointSchedule if clg_sch.is_initialized clg_sch = clg_sch.get if clg_sch.to_ScheduleRuleset.is_initialized clg_sch = clg_sch.to_ScheduleRuleset.get min_c = schedule_ruleset_annual_min_max_value(clg_sch)['min'] if min_c < temp_c cld = true end end end end return cld end |
#thermal_zone_demand_control_ventilation_limits(thermal_zone) ⇒ Array<Double>
Determine the area and occupancy level limits for demand control ventilation. No DCV requirements by default.
and the minimum occupancy density in m^2/person. Returns nil if there is no requirement.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1391 def thermal_zone_demand_control_ventilation_limits(thermal_zone) min_area_m2 = nil min_area_per_occ = nil return [min_area_m2, min_area_per_occ] end |
#thermal_zone_demand_control_ventilation_required?(thermal_zone, climate_zone) ⇒ Bool
Add exception logic for 90.1-2013 for cells, sickrooms, labs, barbers, salons, and bowling alleys
Determine if demand control ventilation (DCV) is required for this zone based on area and occupant density. Does not account for System requirements like ERV, economizer, etc. Those are accounted for in the AirLoopHVAC method of the same name.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1332 def thermal_zone_demand_control_ventilation_required?(thermal_zone, climate_zone) dcv_required = false # Get the limits min_area_m2, min_area_m2_per_occ = thermal_zone_demand_control_ventilation_limits(thermal_zone) # Not required if both limits nil if min_area_m2.nil? && min_area_m2_per_occ.nil? return dcv_required end # Get the area served and the number of occupants area_served_m2 = 0 num_people = 0 thermal_zone.spaces.each do |space| area_served_m2 += space.floorArea num_people += space.numberOfPeople end area_served_ft2 = OpenStudio.convert(area_served_m2, 'm^2', 'ft^2').get # Check the minimum area if there is a limit if min_area_m2 # Convert limit to IP min_area_ft2 = OpenStudio.convert(min_area_m2, 'm^2', 'ft^2').get # Check the limit if area_served_ft2 < min_area_ft2 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.ThermalZone', "For #{thermal_zone.name}: DCV is not required since the area is #{area_served_ft2.round} ft2, but the minimum size is #{min_area_ft2.round} ft2.") return dcv_required end end # Check the minimum occupancy density if there is a limit if min_area_m2_per_occ # Convert limit to IP min_area_ft2_per_occ = OpenStudio.convert(min_area_m2_per_occ, 'm^2', 'ft^2').get min_occ_per_ft2 = 1.0 / min_area_ft2_per_occ min_occ_per_1000_ft2 = min_occ_per_ft2 * 1000 # Check the limit occ_per_ft2 = num_people / area_served_ft2 occ_per_1000_ft2 = occ_per_ft2 * 1000 if occ_per_1000_ft2 < min_occ_per_1000_ft2 OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.ThermalZone', "For #{thermal_zone.name}: DCV is not required since the occupant density is #{occ_per_1000_ft2.round} people/1000 ft2, but the minimum occupant density is #{min_occ_per_1000_ft2.round} people/1000 ft2.") return dcv_required end end # If here, DCV is required dcv_required = true return dcv_required end |
#thermal_zone_design_internal_load(thermal_zone) ⇒ Double
Determine the design internal load (W) for this zone without space multipliers. This include People, Lights, Electric Equipment, and Gas Equipment in all spaces in this zone. It assumes 100% of the wattage is converted to heat, and that the design peak schedule value is 1 (100%).
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1272 def thermal_zone_design_internal_load(thermal_zone) load_w = 0.0 thermal_zone.spaces.each do |space| load_w += space_design_internal_load(space) end return load_w end |
#thermal_zone_exhaust_fan_dcv_required?(thermal_zone) ⇒ Bool
returns true if DCV is required for exhaust fan for specified tempate
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1531 def thermal_zone_exhaust_fan_dcv_required?(thermal_zone); end |
#thermal_zone_floor_area_with_zone_multipliers(thermal_zone) ⇒ Double
Determine the net area of the zone Loops on each space, and checks if part of total floor area or not If not part of total floor area, it is not added to the zone floor area Will multiply it by the ZONE MULTIPLIER as well!
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 549 def thermal_zone_floor_area_with_zone_multipliers(thermal_zone) area_m2 = 0 zone_mult = multiplier spaces.each do |space| # If space is not part of floor area, we don't add it next unless space.partofTotalFloorArea area_m2 += space.floorArea end return area_m2 * zone_mult end |
#thermal_zone_fossil_hybrid_or_purchased_heat?(thermal_zone) ⇒ Boolean
Determine if the thermal zone is a Fossil Fuel, Fossil/Electric Hybrid, and Purchased Heat zone. If not, it is an Electric or Other Zone. This is as-defined by 90.1 Appendix G.
return [Bool] true if Fossil Fuel, Fossil/Electric Hybrid, and Purchased Heat zone, false if Electric or Other. To-do: It’s not doing it properly right now. If you have a zone with a VRF + a DOAS (via an ATU SingleDUct Uncontrolled) it’ll pick up both natural gas and electricity and classify it as fossil fuel, when I would definitely classify it as electricity
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 391 def thermal_zone_fossil_hybrid_or_purchased_heat?(thermal_zone) is_fossil = false # Get an array of the heating fuels # used by the zone. Possible values are # Electricity, NaturalGas, PropaneGas, FuelOil#1, FuelOil#2, # Coal, Diesel, Gasoline, DistrictHeating, # and SolarEnergy. htg_fuels = thermal_zone.heating_fuels if htg_fuels.include?('NaturalGas') || htg_fuels.include?('PropaneGas') || htg_fuels.include?('FuelOil#1') || htg_fuels.include?('FuelOil#2') || htg_fuels.include?('Coal') || htg_fuels.include?('Diesel') || htg_fuels.include?('Gasoline') || htg_fuels.include?('DistrictHeating') is_fossil = true end # OpenStudio::logFree(OpenStudio::Debug, "openstudio.Standards.Model", "For #{self.name}, heating fuels = #{htg_fuels.join(', ')}; thermal_zone_fossil_hybrid_or_purchased_heat?(thermal_zone) = #{is_fossil}.") return is_fossil end |
#thermal_zone_fossil_or_electric_type(thermal_zone, custom) ⇒ String
Determine if the thermal zone’s fuel type category. Options are: fossil, electric, unconditioned If a customization is passed, additional categories may be returned. If ‘Xcel Energy CO EDA’, the type fossilandelectric is added. DistrictHeating is considered a fossil fuel since it is typically created by natural gas boilers.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 428 def thermal_zone_fossil_or_electric_type(thermal_zone, custom) fossil = false electric = false # Fossil heating htg_fuels = thermal_zone.heating_fuels if htg_fuels.include?('NaturalGas') || htg_fuels.include?('PropaneGas') || htg_fuels.include?('FuelOil#1') || htg_fuels.include?('FuelOil#2') || htg_fuels.include?('Coal') || htg_fuels.include?('Diesel') || htg_fuels.include?('Gasoline') || htg_fuels.include?('DistrictHeating') fossil = true end # Electric heating if htg_fuels.include?('Electricity') electric = true end # Cooling fuels, for determining # unconditioned zones clg_fuels = thermal_zone.cooling_fuels # Categorize fuel_type = nil if fossil # If uses any fossil, counts as fossil even if electric is present too fuel_type = 'fossil' elsif electric fuel_type = 'electric' elsif htg_fuels.size.zero? && clg_fuels.size.zero? fuel_type = 'unconditioned' else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Standards.Model', "For #{thermal_zone.name}, could not determine fuel type, assuming fossil. Heating fuels = #{htg_fuels.join(', ')}; cooling fuels = #{clg_fuels.join(', ')}.") fuel_type = 'fossil' end # Customization for Xcel. # Likely useful for other utility # programs where fuel switching is important. # This is primarily for systems where Gas is # used at the central AHU and electric is # used at the terminals/zones. Examples # include zone VRF/PTHP with gas-heated DOAS, # and gas VAV with electric reheat case custom when 'Xcel Energy CO EDA' if fossil && electric fuel_type = 'fossilandelectric' end end # OpenStudio::logFree(OpenStudio::Info, "openstudio.Standards.Model", "For #{self.name}, fuel type = #{fuel_type}.") return fuel_type end |
#thermal_zone_get_adjacent_zones_with_shared_wall_areas(thermal_zone, same_floor = true) ⇒ Array
returns adjacant_zones_with_shared_wall_areas
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1510 def thermal_zone_get_adjacent_zones_with_shared_wall_areas(thermal_zone, same_floor = true) adjacent_zones = [] thermal_zone.spaces.each do |space| adj_spaces = space_get_adjacent_spaces_with_shared_wall_areas(space) adj_spaces.each do |k, v| # skip if space is in current thermal zone. next unless space.thermalZone.is_initialized next if k.thermalZone.get == thermal_zone adjacent_zones << k.thermalZone.get end end adjacent_zones = adjacent_zones.uniq return adjacent_zones end |
#thermal_zone_get_occupancy_schedule(thermal_zone, occupied_percentage_threshold = 0.05) ⇒ ScheduleRuleset
Speed up this method. Bottleneck is ScheduleRule.getDaySchedules
This method creates a schedule where the value is zero when the overall occupancy for 1 zone is below the specified threshold, and one when the overall occupancy is greater than or equal to the threshold. This method is designed to use the total number of people in the zone.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 143 def thermal_zone_get_occupancy_schedule(thermal_zone, occupied_percentage_threshold = 0.05) # Get all the occupancy schedules in every space in the zone # Include people added via the SpaceType # in addition to people hard-assigned to the Space itself. occ_schedules_num_occ = {} max_occ_on_thermal_zone = 0 # Get the people objects spaces.each do |space| # From the space type if space.spaceType.is_initialized space.spaceType.get.people.each do |people| num_ppl_sch = people.numberofPeopleSchedule if num_ppl_sch.is_initialized num_ppl_sch = num_ppl_sch.get num_ppl_sch = num_ppl_sch.to_ScheduleRuleset next if num_ppl_sch.empty? # Skip non-ruleset schedules num_ppl_sch = num_ppl_sch.get num_ppl = people.getNumberOfPeople(space.floorArea) if occ_schedules_num_occ[num_ppl_sch].nil? occ_schedules_num_occ[num_ppl_sch] = num_ppl else occ_schedules_num_occ[num_ppl_sch] += num_ppl end max_occ_on_thermal_zone += num_ppl end end end # From the space space.people.each do |people| num_ppl_sch = people.numberofPeopleSchedule if num_ppl_sch.is_initialized num_ppl_sch = num_ppl_sch.get num_ppl_sch = num_ppl_sch.to_ScheduleRuleset next if num_ppl_sch.empty? # Skip non-ruleset schedules num_ppl_sch = num_ppl_sch.get num_ppl = people.getNumberOfPeople(space.floorArea) if occ_schedules_num_occ[num_ppl_sch].nil? occ_schedules_num_occ[num_ppl_sch] = num_ppl else occ_schedules_num_occ[num_ppl_sch] += num_ppl end max_occ_on_thermal_zone += num_ppl end end end # For each day of the year, determine # time_value_pairs = [] year = thermal_zone.model.getYearDescription yearly_data = [] yearly_times = OpenStudio::DateTimeVector.new yearly_values = [] (1..365).each do |i| times_on_this_day = [] os_date = year.makeDate(i) day_of_week = os_date.dayOfWeek.valueName # Get the unique time indices and corresponding day schedules occ_schedules_day_schs = {} day_sch_num_occ = {} occ_schedules_num_occ.each do |occ_sch, num_occ| # Get the day schedules for this day # (there should only be one) day_schs = occ_sch.getDaySchedules(os_date, os_date) day_schs[0].times.each do |time| times_on_this_day << time.toString end day_sch_num_occ[day_schs[0]] = num_occ end # Determine the total fraction for the airloop at each time daily_times = [] daily_os_times = [] daily_values = [] daily_occs = [] times_on_this_day.uniq.sort.each do |time| os_time = OpenStudio::Time.new(time) os_date_time = OpenStudio::DateTime.new(os_date, os_time) # Total number of people at each time tot_occ_at_time = 0 day_sch_num_occ.each do |day_sch, num_occ| occ_frac = day_sch.getValue(os_time) tot_occ_at_time += occ_frac * num_occ end # Total fraction for the airloop at each time thermal_zone_occ_frac = tot_occ_at_time / max_occ_on_thermal_zone occ_status = 0 # unoccupied if thermal_zone_occ_frac >= occupied_percentage_threshold occ_status = 1 end # Add this data to the daily arrays daily_times << time daily_os_times << os_time daily_values << occ_status daily_occs << thermal_zone_occ_frac.round(2) end # Simplify the daily times to eliminate intermediate # points with the same value as the following point. simple_daily_times = [] simple_daily_os_times = [] simple_daily_values = [] simple_daily_occs = [] daily_values.each_with_index do |value, j| next if value == daily_values[j + 1] simple_daily_times << daily_times[j] simple_daily_os_times << daily_os_times[j] simple_daily_values << daily_values[j] simple_daily_occs << daily_occs[j] end # Store the daily values yearly_data << { 'date' => os_date, 'day_of_week' => day_of_week, 'times' => simple_daily_times, 'values' => simple_daily_values, 'daily_os_times' => simple_daily_os_times, 'daily_occs' => simple_daily_occs } end # Create a TimeSeries from the data # time_series = OpenStudio::TimeSeries.new(times, values, 'unitless') # Make a schedule ruleset sch_name = "#{thermal_zone.name} Occ Sch" sch_ruleset = OpenStudio::Model::ScheduleRuleset.new(thermal_zone.model) sch_ruleset.setName(sch_name.to_s) # Default - All Occupied day_sch = sch_ruleset.defaultDaySchedule day_sch.setName("#{sch_name} Default") day_sch.addValue(OpenStudio::Time.new(0, 24, 0, 0), 1) # Winter Design Day - All Occupied day_sch = OpenStudio::Model::ScheduleDay.new(thermal_zone.model) sch_ruleset.setWinterDesignDaySchedule(day_sch) day_sch = sch_ruleset.winterDesignDaySchedule day_sch.setName("#{sch_name} Winter Design Day") day_sch.addValue(OpenStudio::Time.new(0, 24, 0, 0), 1) # Summer Design Day - All Occupied day_sch = OpenStudio::Model::ScheduleDay.new(thermal_zone.model) sch_ruleset.setSummerDesignDaySchedule(day_sch) day_sch = sch_ruleset.summerDesignDaySchedule day_sch.setName("#{sch_name} Summer Design Day") day_sch.addValue(OpenStudio::Time.new(0, 24, 0, 0), 1) # Create ruleset schedules, attempting to create # the minimum number of unique rules. ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'].each do |weekday| end_of_prev_rule = yearly_data[0]['date'] yearly_data.each_with_index do |daily_data, k| # Skip unless it is the day of week # currently under inspection day = daily_data['day_of_week'] next unless day == weekday date = daily_data['date'] times = daily_data['times'] values = daily_data['values'] daily_occs = daily_data['daily_occs'] # If the next (Monday, Tuesday, etc.) # is the same as today, keep going. # If the next is different, or if # we've reached the end of the year, # create a new rule unless yearly_data[k + 7].nil? next_day_times = yearly_data[k + 7]['times'] next_day_values = yearly_data[k + 7]['values'] next if times == next_day_times && values == next_day_values end daily_os_times = daily_data['daily_os_times'] daily_occs = daily_data['daily_occs'] # If here, we need to make a rule to cover from the previous # rule to today sch_rule = OpenStudio::Model::ScheduleRule.new(sch_ruleset) sch_rule.setName("#{sch_name} #{weekday} Rule") day_sch = sch_rule.daySchedule day_sch.setName("#{sch_name} #{weekday}") daily_os_times.each_with_index do |time, l| value = values[l] next if value == values[l + 1] # Don't add breaks if same value day_sch.addValue(time, value) end # Set the dates when the rule applies sch_rule.setStartDate(end_of_prev_rule) sch_rule.setEndDate(date) # Individual Days sch_rule.setApplyMonday(true) if weekday == 'Monday' sch_rule.setApplyTuesday(true) if weekday == 'Tuesday' sch_rule.setApplyWednesday(true) if weekday == 'Wednesday' sch_rule.setApplyThursday(true) if weekday == 'Thursday' sch_rule.setApplyFriday(true) if weekday == 'Friday' sch_rule.setApplySaturday(true) if weekday == 'Saturday' sch_rule.setApplySunday(true) if weekday == 'Sunday' # Reset the previous rule end date end_of_prev_rule = date + OpenStudio::Time.new(0, 24, 0, 0) end end return sch_ruleset end |
#thermal_zone_heated?(thermal_zone) ⇒ Bool
Determines heating status. If the zone has a thermostat with a maximum heating setpoint above 5C (41F), counts as heated. Plenums are also assumed to be heated.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 710 def thermal_zone_heated?(thermal_zone) temp_f = 41 temp_c = OpenStudio.convert(temp_f, 'F', 'C').get htd = false # Consider plenum zones heated area_plenum = 0 area_non_plenum = 0 thermal_zone.spaces.each do |space| if space_plenum?(space) area_plenum += space.floorArea else area_non_plenum += space.floorArea end end # Majority if area_plenum > area_non_plenum htd = true return htd end # Check if the zone has radiant heating, # and if it does, get heating setpoint schedule # directly from the radiant system to check. thermal_zone.equipment.each do |equip| htg_sch = nil if equip.to_ZoneHVACHighTemperatureRadiant.is_initialized equip = equip.to_ZoneHVACHighTemperatureRadiant.get if equip.heatingSetpointTemperatureSchedule.is_initialized htg_sch = equip.heatingSetpointTemperatureSchedule.get end elsif equip.to_ZoneHVACLowTemperatureRadiantElectric.is_initialized equip = equip.to_ZoneHVACLowTemperatureRadiantElectric.get htg_sch = equip.heatingSetpointTemperatureSchedule.get elsif equip.to_ZoneHVACLowTempRadiantConstFlow.is_initialized equip = equip.to_ZoneHVACLowTempRadiantConstFlow.get htg_coil = equip.heatingCoil if htg_coil.to_CoilHeatingLowTempRadiantConstFlow.is_initialized htg_coil = htg_coil.to_CoilHeatingLowTempRadiantConstFlow.get if htg_coil.heatingHighControlTemperatureSchedule.is_initialized htg_sch = htg_coil.heatingHighControlTemperatureSchedule.get end end elsif equip.to_ZoneHVACLowTempRadiantVarFlow.is_initialized equip = equip.to_ZoneHVACLowTempRadiantVarFlow.get htg_coil = equip.heatingCoil if htg_coil.to_CoilHeatingLowTempRadiantVarFlow.is_initialized htg_coil = htg_coil.to_CoilHeatingLowTempRadiantVarFlow.get if htg_coil.heatingControlTemperatureSchedule.is_initialized htg_sch = htg_coil.heatingControlTemperatureSchedule.get end end end # Move on if no heating schedule was found next if htg_sch.nil? # Get the setpoint from the schedule if htg_sch.to_ScheduleRuleset.is_initialized htg_sch = htg_sch.to_ScheduleRuleset.get max_c = schedule_ruleset_annual_min_max_value(htg_sch)['max'] if max_c > temp_c htd = true end elsif htg_sch.to_ScheduleConstant.is_initialized htg_sch = htg_sch.to_ScheduleConstant.get max_c = schedule_constant_annual_min_max_value(htg_sch)['max'] if max_c > temp_c htd = true end elsif htg_sch.to_ScheduleCompact.is_initialized htg_sch = htg_sch.to_ScheduleCompact.get max_c = schedule_compact_annual_min_max_value(htg_sch)['max'] if max_c > temp_c htd = true end else OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "Zone #{thermal_zone.name} used an unknown schedule type for the heating setpoint; assuming heated.") htd = true end end # Unheated if no thermostat present if thermal_zone.thermostat.empty? return htd end # Check the heating setpoint tstat = thermal_zone.thermostat.get if tstat.to_ThermostatSetpointDualSetpoint tstat = tstat.to_ThermostatSetpointDualSetpoint.get htg_sch = tstat.getHeatingSchedule if htg_sch.is_initialized htg_sch = htg_sch.get if htg_sch.to_ScheduleRuleset.is_initialized htg_sch = htg_sch.to_ScheduleRuleset.get max_c = schedule_ruleset_annual_min_max_value(htg_sch)['max'] if max_c > temp_c htd = true end elsif htg_sch.to_ScheduleConstant.is_initialized htg_sch = htg_sch.to_ScheduleConstant.get max_c = schedule_constant_annual_min_max_value(htg_sch)['max'] if max_c > temp_c htd = true end elsif htg_sch.to_ScheduleCompact.is_initialized htg_sch = htg_sch.to_ScheduleCompact.get max_c = schedule_compact_annual_min_max_value(htg_sch)['max'] if max_c > temp_c htd = true end else OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "Zone #{thermal_zone.name} used an unknown schedule type for the heating setpoint; assuming heated.") htd = true end end elsif tstat.to_ZoneControlThermostatStagedDualSetpoint tstat = tstat.to_ZoneControlThermostatStagedDualSetpoint.get htg_sch = tstat.heatingTemperatureSetpointSchedule if htg_sch.is_initialized htg_sch = htg_sch.get if htg_sch.to_ScheduleRuleset.is_initialized htg_sch = htg_sch.to_ScheduleRuleset.get max_c = schedule_ruleset_annual_min_max_value(htg_sch)['max'] if max_c > temp_c htd = true end end end end return htd end |
#thermal_zone_infer_system_type(thermal_zone) ⇒ String
Infers the baseline system type based on the equipment serving the zone and their heating/cooling fuels. Only does a high-level inference; does not look for the presence/absence of required controls, etc.
PTHP, PTAC, PSZ_AC, PSZ_HP, PVAV_Reheat, PVAV_PFP_Boxes, VAV_Reheat, VAV_PFP_Boxes, Gas_Furnace, Electric_Furnace
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 569 def thermal_zone_infer_system_type(thermal_zone) # Determine the characteristics # of the equipment serving the zone has_air_loop = false air_loop_num_zones = 0 air_loop_is_vav = false air_loop_has_chw = false has_ptac = false has_pthp = false has_unitheater = false thermal_zone.equipment.each do |equip| # Skip HVAC components next unless equip.to_HVACComponent.is_initialized equip = equip.to_HVACComponent.get if equip.airLoopHVAC.is_initialized has_air_loop = true air_loop = equip.airLoopHVAC.get air_loop_num_zones = air_loop.thermalZones.size air_loop.supplyComponents.each do |sc| if sc.to_FanVariableVolume.is_initialized air_loop_is_vav = true elsif sc.to_CoilCoolingWater.is_initialized air_loop_has_chw = true end end elsif equip.to_ZoneHVACPackagedTerminalAirConditioner.is_initialized has_ptac = true elsif equip.to_ZoneHVACPackagedTerminalHeatPump.is_initialized has_pthp = true elsif equip.to_ZoneHVACUnitHeater.is_initialized has_unitheater = true end end # Get the zone heating and cooling fuels htg_fuels = thermal_zone.heating_fuels clg_fuels = thermal_zone.cooling_fuels is_fossil = thermal_zone_fossil_hybrid_or_purchased_heat?(thermal_zone) # Infer the HVAC type sys_type = 'Unknown' # Single zone if air_loop_num_zones < 2 # Gas if is_fossil # Air Loop if has_air_loop # Gas_Furnace (as air loop) sys_type = if clg_fuels.size.zero? 'Gas_Furnace' # PSZ_AC else 'PSZ_AC' end # Zone Equipment else # Gas_Furnace (as unit heater) if has_unitheater sys_type = 'Gas_Furnace' end # PTAC if has_ptac sys_type = 'PTAC' end end # Electric else # Air Loop if has_air_loop # Electric_Furnace (as air loop) sys_type = if clg_fuels.size.zero? 'Electric_Furnace' # PSZ_HP else 'PSZ_HP' end # Zone Equipment else # Electric_Furnace (as unit heater) if has_unitheater sys_type = 'Electric_Furnace' end # PTHP if has_pthp sys_type = 'PTHP' end end end # Multi-zone else # Gas if is_fossil # VAV_Reheat if air_loop_has_chw && air_loop_is_vav sys_type = 'VAV_Reheat' end # PVAV_Reheat if !air_loop_has_chw && air_loop_is_vav sys_type = 'PVAV_Reheat' end # Electric else # VAV_PFP_Boxes if air_loop_has_chw && air_loop_is_vav sys_type = 'VAV_PFP_Boxes' end # PVAV_PFP_Boxes if !air_loop_has_chw && air_loop_is_vav sys_type = 'PVAV_PFP_Boxes' end end end # Report out the characteristics for debugging if # the system type cannot be inferred. if sys_type == 'Unknown' OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Standards.ThermalZone', "For #{thermal_zone.name}, the baseline system type could not be inferred.") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "***#{thermal_zone.name}***") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "system type = #{sys_type}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "has_air_loop = #{has_air_loop}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "air_loop_num_zones = #{air_loop_num_zones}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "air_loop_is_vav = #{air_loop_is_vav}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "air_loop_has_chw = #{air_loop_has_chw}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "has_ptac = #{has_ptac}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "has_pthp = #{has_pthp}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "has_unitheater = #{has_unitheater}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "htg_fuels = #{htg_fuels}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "clg_fuels = #{clg_fuels}") OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.ThermalZone', "is_fossil = #{is_fossil}") end return sys_type end |
#thermal_zone_majority_space_type(thermal_zone) ⇒ Boost::Optional<OpenStudio::Model::SpaceType>
Returns the space type that represents a majority of the floor area.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1286 def thermal_zone_majority_space_type(thermal_zone) space_type_to_area = Hash.new(0.0) thermal_zone.spaces.each do |space| if space.spaceType.is_initialized space_type = space.spaceType.get space_type_to_area[space_type] += space.floorArea end end # If no space types, return empty optional SpaceType if space_type_to_area.size.zero? return OpenStudio::Model::OptionalSpaceType.new end # Sort by area biggest_space_type = space_type_to_area.sort_by { |st, area| area }.reverse[0][0] return OpenStudio::Model::OptionalSpaceType.new(biggest_space_type) end |
#thermal_zone_mixed_heating_fuel?(thermal_zone) ⇒ Boolean
Determine if the thermal zone is Fossil/Purchased Heat/Electric Hybrid
return [Bool] true if mixed Fossil/Electric Hybrid, and Purchased Heat zone
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 493 def thermal_zone_mixed_heating_fuel?(thermal_zone) is_mixed = false # Get an array of the heating fuels # used by the zone. Possible values are # Electricity, NaturalGas, PropaneGas, FuelOil#1, FuelOil#2, # Coal, Diesel, Gasoline, DistrictHeating, # and SolarEnergy. htg_fuels = thermal_zone.heating_fuels # Includes fossil fossil = false if htg_fuels.include?('NaturalGas') || htg_fuels.include?('PropaneGas') || htg_fuels.include?('FuelOil#1') || htg_fuels.include?('FuelOil#2') || htg_fuels.include?('Coal') || htg_fuels.include?('Diesel') || htg_fuels.include?('Gasoline') fossil = true end # Electric and fossil and district if htg_fuels.include?('Electricity') && htg_fuels.include?('DistrictHeating') && fossil is_mixed = true OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.Model', "For #{thermal_zone.name}, heating mixed electricity, fossil, and district.") end # Electric and fossil if htg_fuels.include?('Electricity') && fossil is_mixed = true OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.Model', "For #{thermal_zone.name}, heating mixed electricity and fossil.") end # Electric and district if htg_fuels.include?('Electricity') && htg_fuels.include?('DistrictHeating') is_mixed = true OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.Model', "For #{thermal_zone.name}, heating mixed electricity and district.") end # Fossil and district if fossil && htg_fuels.include?('DistrictHeating') is_mixed = true OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.Model', "For #{thermal_zone.name}, heating mixed fossil and district.") end return is_mixed end |
#thermal_zone_occupancy_type(thermal_zone) ⇒ String
Add public assembly building types
Determine the thermal zone’s occupancy type category. Options are: residential, nonresidential
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1312 def thermal_zone_occupancy_type(thermal_zone) occ_type = if thermal_zone_residential?(thermal_zone) 'residential' else 'nonresidential' end # OpenStudio::logFree(OpenStudio::Info, "openstudio.Standards.ThermalZone", "For #{self.name}, occupancy type = #{occ_type}.") return occ_type end |
#thermal_zone_outdoor_airflow_rate(thermal_zone) ⇒ Double
Calculates the zone outdoor airflow requirement (Voz) based on the inputs in the DesignSpecification:OutdoorAir obects in all spaces in the zone.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 11 def thermal_zone_outdoor_airflow_rate(thermal_zone) tot_oa_flow_rate = 0.0 spaces = thermal_zone.spaces.sort sum_floor_area = 0.0 sum_number_of_people = 0.0 sum_volume = 0.0 # Variables for merging outdoor air any_max_oa_method = false sum_oa_for_people = 0.0 sum_oa_for_floor_area = 0.0 sum_oa_rate = 0.0 sum_oa_for_volume = 0.0 # Find common variables for the new space spaces.each do |space| floor_area = space.floorArea sum_floor_area += floor_area number_of_people = space.numberOfPeople sum_number_of_people += number_of_people volume = space.volume sum_volume += volume dsn_oa = space.designSpecificationOutdoorAir next if dsn_oa.empty? dsn_oa = dsn_oa.get # compute outdoor air rates in case we need them oa_for_people = number_of_people * dsn_oa.outdoorAirFlowperPerson oa_for_floor_area = floor_area * dsn_oa.outdoorAirFlowperFloorArea oa_rate = dsn_oa.outdoorAirFlowRate oa_for_volume = volume * dsn_oa.outdoorAirFlowAirChangesperHour / 3600 # First check if this space uses the Maximum method and other spaces do not if dsn_oa.outdoorAirMethod == 'Maximum' sum_oa_rate += [oa_for_people, oa_for_floor_area, oa_rate, oa_for_volume].max elsif dsn_oa.outdoorAirMethod == 'Sum' sum_oa_for_people += oa_for_people sum_oa_for_floor_area += oa_for_floor_area sum_oa_rate += oa_rate sum_oa_for_volume += oa_for_volume end end tot_oa_flow_rate += sum_oa_for_people tot_oa_flow_rate += sum_oa_for_floor_area tot_oa_flow_rate += sum_oa_rate tot_oa_flow_rate += sum_oa_for_volume # Convert to cfm tot_oa_flow_rate_cfm = OpenStudio.convert(tot_oa_flow_rate, 'm^3/s', 'cfm').get OpenStudio.logFree(OpenStudio::Debug, 'openstudio.Standards.Model', "For #{thermal_zone.name}, design min OA = #{tot_oa_flow_rate_cfm.round} cfm.") return tot_oa_flow_rate end |
#thermal_zone_outdoor_airflow_rate_per_area(thermal_zone) ⇒ Double
Calculates the zone outdoor airflow requirement and divides by the zone area.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 77 def thermal_zone_outdoor_airflow_rate_per_area(thermal_zone) tot_oa_flow_rate_per_area = 0.0 # Find total area of the zone sum_floor_area = 0.0 thermal_zone.spaces.sort.each do |space| sum_floor_area += space.floorArea end # Get the OA flow rate tot_oa_flow_rate = thermal_zone_outdoor_airflow_rate(thermal_zone) # Calculate the per-area value tot_oa_flow_rate_per_area = tot_oa_flow_rate / sum_floor_area # OpenStudio::logFree(OpenStudio::Debug, "openstudio.Standards.Model", "For #{self.name}, OA per area = #{tot_oa_flow_rate_per_area.round(8)} m^3/s*m^2.") return tot_oa_flow_rate_per_area end |
#thermal_zone_plenum?(thermal_zone) ⇒ Bool
Determine if the thermal zone is a plenum based on whether a majority of the spaces in the zone are plenums or not.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 982 def thermal_zone_plenum?(thermal_zone) plenum_status = false area_plenum = 0 area_non_plenum = 0 thermal_zone.spaces.each do |space| if space_plenum?(space) area_plenum += space.floorArea else area_non_plenum += space.floorArea end end # Majority if area_plenum > area_non_plenum plenum_status = true end return plenum_status end |
#thermal_zone_prm_baseline_cooling_design_supply_temperature(thermal_zone) ⇒ Double
Exception: 17F delta-T for labs
Calculate the cooling supply temperature based on the specified delta-T. Delta-T is calculated based on the highest value found in the cooling setpoint schedule.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1153 def thermal_zone_prm_baseline_cooling_design_supply_temperature(thermal_zone) setpoint_c = nil # Setpoint schedule tstat = thermal_zone.thermostatSetpointDualSetpoint if tstat.is_initialized tstat = tstat.get setpoint_sch = tstat.coolingSetpointTemperatureSchedule if setpoint_sch.is_initialized setpoint_sch = setpoint_sch.get if setpoint_sch.to_ScheduleRuleset.is_initialized setpoint_sch = setpoint_sch.to_ScheduleRuleset.get setpoint_c = schedule_ruleset_annual_min_max_value(setpoint_sch)['min'] elsif setpoint_sch.to_ScheduleConstant.is_initialized setpoint_sch = setpoint_sch.to_ScheduleConstant.get setpoint_c = schedule_constant_annual_min_max_value(setpoint_sch)['min'] elsif setpoint_sch.to_ScheduleCompact.is_initialized setpoint_sch = setpoint_sch.to_ScheduleCompact.get setpoint_c = schedule_compact_annual_min_max_value(setpoint_sch)['min'] end end end # If the cooling setpoint could not be determined # return the current design cooling temperature if setpoint_c.nil? setpoint_c = thermal_zone.sizingZone.zoneCoolingDesignSupplyAirTemperature OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Standards.ThermalZone', "For #{thermal_zone.name}: could not determine min cooling setpoint. Design cooling SAT will be #{OpenStudio.convert(setpoint_c, 'C', 'F').get.round} F from proposed model.") return setpoint_c end # If the cooling setpoint was set very high so that # cooling equipment never comes on # return the current design cooling temperature if setpoint_c > OpenStudio.convert(91, 'F', 'C').get setpoint_f = OpenStudio.convert(setpoint_c, 'C', 'F').get new_setpoint_c = thermal_zone.sizingZone.zoneCoolingDesignSupplyAirTemperature new_setpoint_f = OpenStudio.convert(new_setpoint_c, 'C', 'F').get OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Standards.ThermalZone', "For #{thermal_zone.name}: max cooling setpoint in proposed model was #{setpoint_f.round} F. 20 F SAT delta-T from this point is unreasonable. Design cooling SAT will be #{new_setpoint_f.round} F from proposed model.") return new_setpoint_c end # Subtract 20F delta-T delta_t_r = 20 delta_t_k = OpenStudio.convert(delta_t_r, 'R', 'K').get sat_c = setpoint_c - delta_t_k # Subtract for cooling return sat_c end |
#thermal_zone_prm_baseline_heating_design_supply_temperature(thermal_zone) ⇒ Double
Exception: 17F delta-T for labs
Calculate the heating supply temperature based on the specified delta-T. Delta-T is calculated based on the highest value found in the heating setpoint schedule.
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 1096 def thermal_zone_prm_baseline_heating_design_supply_temperature(thermal_zone) setpoint_c = nil # Setpoint schedule tstat = thermal_zone.thermostatSetpointDualSetpoint if tstat.is_initialized tstat = tstat.get setpoint_sch = tstat.heatingSetpointTemperatureSchedule if setpoint_sch.is_initialized setpoint_sch = setpoint_sch.get if setpoint_sch.to_ScheduleRuleset.is_initialized setpoint_sch = setpoint_sch.to_ScheduleRuleset.get setpoint_c = schedule_ruleset_annual_min_max_value(setpoint_sch)['max'] elsif setpoint_sch.to_ScheduleConstant.is_initialized setpoint_sch = setpoint_sch.to_ScheduleConstant.get setpoint_c = schedule_constant_annual_min_max_value(setpoint_sch)['max'] elsif setpoint_sch.to_ScheduleCompact.is_initialized setpoint_sch = setpoint_sch.to_ScheduleCompact.get setpoint_c = schedule_compact_annual_min_max_value(setpoint_sch)['max'] end end end # If the heating setpoint could not be determined # return the current design heating temperature if setpoint_c.nil? setpoint_c = thermal_zone.sizingZone.zoneHeatingDesignSupplyAirTemperature OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Standards.ThermalZone', "For #{thermal_zone.name}: could not determine max heating setpoint. Design heating SAT will be #{OpenStudio.convert(setpoint_c, 'C', 'F').get.round} F from proposed model.") return setpoint_c end # If the heating setpoint was set very low so that # heating equipment never comes on # return the current design heating temperature if setpoint_c < OpenStudio.convert(41, 'F', 'C').get setpoint_f = OpenStudio.convert(setpoint_c, 'C', 'F').get new_setpoint_c = thermal_zone.sizingZone.zoneHeatingDesignSupplyAirTemperature new_setpoint_f = OpenStudio.convert(new_setpoint_c, 'C', 'F').get OpenStudio.logFree(OpenStudio::Warn, 'openstudio.Standards.ThermalZone', "For #{thermal_zone.name}: max heating setpoint in proposed model was #{setpoint_f.round} F. 20 F SAT delta-T from this point is unreasonable. Design heating SAT will be #{new_setpoint_f.round} F from proposed model.") return new_setpoint_c end # Add 20F delta-T delta_t_r = 20 delta_t_k = OpenStudio.convert(delta_t_r, 'R', 'K').get sat_c = setpoint_c + delta_t_k # Add for heating return sat_c end |
#thermal_zone_residential?(thermal_zone) ⇒ Boolean
Determine if the thermal zone is residential based on the space type properties for the spaces in the zone. If there are both residential and nonresidential spaces in the zone, the result will be whichever type has more floor area. In the event that they are equal, it will be assumed nonresidential.
return [Bool] true if residential, false if nonresidential
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# File 'lib/openstudio-standards/standards/Standards.ThermalZone.rb', line 358 def thermal_zone_residential?(thermal_zone) # Determine the respective areas res_area_m2 = 0 nonres_area_m2 = 0 thermal_zone.spaces.each do |space| # Ignore space if not part of total area next unless space.partofTotalFloorArea if space_residential?(space) res_area_m2 += space.floorArea else nonres_area_m2 += space.floorArea end end # Determine which is larger is_res = false if res_area_m2 > nonres_area_m2 is_res = true end return is_res end |
#water_heater_mixed_apply_efficiency(water_heater_mixed) ⇒ Bool
Applies the standard efficiency ratings and typical losses and paraisitic loads to this object. Efficiency and skin loss coefficient (UA) Per PNNL www.energycodes.gov/sites/default/files/documents/PrototypeModelEnhancements_2014_0.pdf Appendix A: Service Water Heating
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# File 'lib/openstudio-standards/standards/Standards.WaterHeaterMixed.rb', line 11 def water_heater_mixed_apply_efficiency(water_heater_mixed) # Get the capacity of the water heater # TODO add capability to pull autosized water heater capacity # if the Sizing:WaterHeater object is ever implemented in OpenStudio. capacity_w = water_heater_mixed.heaterMaximumCapacity if capacity_w.empty? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.WaterHeaterMixed', "For #{water_heater_mixed.name}, cannot find capacity, standard will not be applied.") return false else capacity_w = capacity_w.get end capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get # Get the volume of the water heater # TODO add capability to pull autosized water heater volume # if the Sizing:WaterHeater object is ever implemented in OpenStudio. volume_m3 = water_heater_mixed.tankVolume if volume_m3.empty? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.WaterHeaterMixed', "For #{water_heater_mixed.name}, cannot find volume, standard will not be applied.") return false else volume_m3 = volume_m3.get end volume_gal = OpenStudio.convert(volume_m3, 'm^3', 'gal').get # Get the heater fuel type fuel_type = water_heater_mixed.heaterFuelType unless fuel_type == 'NaturalGas' || fuel_type == 'Electricity' OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.WaterHeaterMixed', "For #{water_heater_mixed.name}, fuel type of #{fuel_type} is not yet supported, standard will not be applied.") end # Get the water heater properties search_criteria = {} search_criteria['template'] = template search_criteria['fuel_type'] = fuel_type wh_props = model_find_object(standards_data['water_heaters'], search_criteria, capacity_btu_per_hr) unless wh_props OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.BoilerHotWater', "For #{water_heater_mixed.name}, cannot find water heater properties, cannot apply efficiency standard.") return false end # Calculate the water heater efficiency and # skin loss coefficient (UA) using different methods, # depending on the metrics specified by the standard water_heater_eff = nil ua_btu_per_hr_per_f = nil # Rarely specified by thermal efficiency alone if wh_props['thermal_efficiency'] && !wh_props['standby_loss_capacity_allowance'] et = wh_props['thermal_efficiency'] water_heater_eff = et # Fixed UA ua_btu_per_hr_per_f = 11.37 end # Typically specified this way for small electric water heaters # and small natural gas water heaters if wh_props['energy_factor_base'] && wh_props['energy_factor_volume_derate'] # Calculate the energy factor (EF) base_ef = wh_props['energy_factor_base'] vol_drt = wh_props['energy_factor_volume_derate'] ef = base_ef - (vol_drt * volume_gal) # Calculate the skin loss coefficient (UA) # differently depending on the fuel type if fuel_type == 'Electricity' # Fixed water heater efficiency per PNNL water_heater_eff = 1 ua_btu_per_hr_per_f = (41_094 * (1 / ef - 1)) / (24 * 67.5) elsif fuel_type == 'NaturalGas' # Fixed water heater thermal efficiency per PNNL water_heater_eff = 0.82 # Calculate the Recovery Efficiency (RE) # based on a fixed capacity of 75,000 Btu/hr # and a fixed volume of 40 gallons by solving # this system of equations: # ua = (1/.95-1/re)/(67.5*(24/41094-1/(re*cap))) # 0.82 = (ua*67.5+cap*re)/cap cap = 75_000.0 re = (Math.sqrt(6724 * ef**2 * cap**2 + 40_409_100 * ef**2 * cap - 28_080_900 * ef * cap + 29_318_000_625 * ef**2 - 58_636_001_250 * ef + 29_318_000_625) + 82 * ef * cap + 171_225 * ef - 171_225) / (200 * ef * cap) # Calculate the skin loss coefficient (UA) # based on the actual capacity. ua_btu_per_hr_per_f = (water_heater_eff - re) * capacity_btu_per_hr / 67.5 end end # Typically specified this way for large electric water heaters if wh_props['standby_loss_base'] && wh_props['standby_loss_volume_allowance'] # Fixed water heater efficiency per PNNL water_heater_eff = 1 # Calculate the max allowable standby loss (SL) sl_base = wh_props['standby_loss_base'] sl_drt = wh_props['standby_loss_volume_allowance'] sl_btu_per_hr = sl_base + (sl_drt * Math.sqrt(volume_gal)) # Calculate the skin loss coefficient (UA) ua_btu_per_hr_per_f = sl_btu_per_hr / 70 end # Typically specified this way for newer large electric water heaters if wh_props['hourly_loss_base'] && wh_props['hourly_loss_volume_allowance'] # Fixed water heater efficiency per PNNL water_heater_eff = 1 # Calculate the percent loss per hr hr_loss_base = wh_props['hourly_loss_base'] hr_loss_allow = wh_props['hourly_loss_volume_allowance'] hrly_loss_pct = hr_loss_base + (hr_loss_allow / volume_gal) / 100 # Convert to Btu/hr, assuming: # Water at 120F, density = 8.25 lb/gal # 1 Btu to raise 1 lb of water 1 F # Therefore 8.25 Btu / gal of water * deg F # 70F delta-T between water and zone hrly_loss_btu_per_hr = hrly_loss_pct * volume_gal * 8.25 * 70 # Calculate the skin loss coefficient (UA) ua_btu_per_hr_per_f = hrly_loss_btu_per_hr / 70 end # Typically specified this way for large natural gas water heaters if wh_props['standby_loss_capacity_allowance'] && wh_props['standby_loss_volume_allowance'] && wh_props['thermal_efficiency'] sl_cap_adj = wh_props['standby_loss_capacity_allowance'] sl_vol_drt = wh_props['standby_loss_volume_allowance'] et = wh_props['thermal_efficiency'] # Calculate the max allowable standby loss (SL) sl_btu_per_hr = (capacity_btu_per_hr / sl_cap_adj + sl_vol_drt * Math.sqrt(volume_gal)) # Calculate the skin loss coefficient (UA) ua_btu_per_hr_per_f = (sl_btu_per_hr * et) / 70 # Calculate water heater efficiency water_heater_eff = (ua_btu_per_hr_per_f * 70 + capacity_btu_per_hr * et) / capacity_btu_per_hr end # Ensure that efficiency and UA were both set\ if water_heater_eff.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.WaterHeaterMixed', "For #{water_heater_mixed.name}, cannot calculate efficiency, cannot apply efficiency standard.") return false end if ua_btu_per_hr_per_f.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.WaterHeaterMixed', "For #{water_heater_mixed.name}, cannot calculate UA, cannot apply efficiency standard.") return false end # Convert to SI ua_btu_per_hr_per_c = OpenStudio.convert(ua_btu_per_hr_per_f, 'Btu/hr*R', 'W/K').get # Set the water heater properties # Efficiency water_heater_mixed.setHeaterThermalEfficiency(water_heater_eff) # Skin loss water_heater_mixed.setOffCycleLossCoefficienttoAmbientTemperature(ua_btu_per_hr_per_c) water_heater_mixed.setOnCycleLossCoefficienttoAmbientTemperature(ua_btu_per_hr_per_c) # TODO: Parasitic loss (pilot light) # PNNL document says pilot lights were removed, but IDFs # still have the on/off cycle parasitic fuel consumptions filled in water_heater_mixed.setOnCycleParasiticFuelType(fuel_type) # self.setOffCycleParasiticFuelConsumptionRate(??) water_heater_mixed.setOnCycleParasiticHeatFractiontoTank(0) water_heater_mixed.setOffCycleParasiticFuelType(fuel_type) # self.setOffCycleParasiticFuelConsumptionRate(??) water_heater_mixed.setOffCycleParasiticHeatFractiontoTank(0.8) # Append the name with standards information water_heater_mixed.setName("#{water_heater_mixed.name} #{water_heater_eff.round(3)} Therm Eff") OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.WaterHeaterMixed', "For #{template}: #{water_heater_mixed.name}; thermal efficiency = #{water_heater_eff.round(3)}, skin-loss UA = #{ua_btu_per_hr_per_f.round}Btu/hr") return true end |
#water_heater_mixed_apply_prm_baseline_fuel_type(water_heater_mixed, building_type) ⇒ Bool
Applies the correct fuel type for the water heaters in the baseline model. For most standards and for most building types, the baseline uses the same fuel type as the proposed.
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# File 'lib/openstudio-standards/standards/Standards.WaterHeaterMixed.rb', line 182 def water_heater_mixed_apply_prm_baseline_fuel_type(water_heater_mixed, building_type) # baseline is same as proposed per Table G3.1 item 11.b return true # Do nothing end |
#water_heater_mixed_find_capacity(water_heater_mixed) ⇒ Double
Finds capacity in Btu/hr
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# File 'lib/openstudio-standards/standards/Standards.WaterHeaterMixed.rb', line 190 def water_heater_mixed_find_capacity(water_heater_mixed) # Get the coil capacity capacity_w = nil if water_heater_mixed.heaterMaximumCapacity.is_initialized capacity_w = water_heater_mixed.heaterMaximumCapacity.get elsif water_heater_mixed.autosizedHeaterMaximumCapacity.is_initialized capacity_w = water_heater_mixed.autosizedHeaterMaximumCapacity.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.WaterHeaterMixed', "For #{water_heater_mixed.name} capacity is not available.") return false end # Convert capacity to Btu/hr capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get return capacity_btu_per_hr end |
#zone_hvac_component_apply_prm_baseline_fan_power(zone_hvac_component) ⇒ Bool
Sets the fan power of zone level HVAC equipment (PTACs, PTHPs, Fan Coils, and Unit Heaters) based on the W/cfm specified in the standard.
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# File 'lib/openstudio-standards/standards/Standards.ZoneHVACComponent.rb', line 9 def zone_hvac_component_apply_prm_baseline_fan_power(zone_hvac_component) OpenStudio.logFree(OpenStudio::Debug, 'openstudio.model.ZoneHVACComponent', "Setting fan power for #{zone_hvac_component.name}.") # Convert this to the actual class type zone_hvac = if zone_hvac_component.to_ZoneHVACFourPipeFanCoil.is_initialized zone_hvac_component.to_ZoneHVACFourPipeFanCoil.get elsif zone_hvac_component.to_ZoneHVACUnitHeater.is_initialized zone_hvac_component.to_ZoneHVACUnitHeater.get elsif zone_hvac_component.to_ZoneHVACPackagedTerminalAirConditioner.is_initialized zone_hvac_component.to_ZoneHVACPackagedTerminalAirConditioner.get elsif zone_hvac_component.to_ZoneHVACPackagedTerminalHeatPump.is_initialized zone_hvac_component.to_ZoneHVACPackagedTerminalHeatPump.get end # Do nothing for other types of zone HVAC equipment if zone_hvac.nil? return false end # Determine the W/cfm fan_efficacy_w_per_cfm = 0.3 # Convert efficacy to metric # 1 cfm = 0.0004719 m^3/s fan_efficacy_w_per_m3_per_s = fan_efficacy_w_per_cfm / 0.0004719 # Get the fan fan = if zone_hvac.supplyAirFan.to_FanConstantVolume.is_initialized zone_hvac.supplyAirFan.to_FanConstantVolume.get elsif zone_hvac.supplyAirFan.to_FanVariableVolume.is_initialized zone_hvac.supplyAirFan.to_FanVariableVolume.get elsif zone_hvac.supplyAirFan.to_FanOnOff.is_initialized zone_hvac.supplyAirFan.to_FanOnOff.get end # Get the maximum flow rate through the fan max_air_flow_rate = nil if fan.autosizedMaximumFlowRate.is_initialized max_air_flow_rate = fan.autosizedMaximumFlowRate.get elsif fan.maximumFlowRate.is_initialized max_air_flow_rate = fan.maximumFlowRate.get end max_air_flow_rate_cfm = OpenStudio.convert(max_air_flow_rate, 'm^3/s', 'ft^3/min').get # Set the impeller efficiency fan_change_impeller_efficiency(fan, fan_baseline_impeller_efficiency(fan)) # Set the motor efficiency, preserving the impeller efficency. # For zone HVAC fans, a bhp lookup of 0.5bhp is always used because # they are assumed to represent a series of small fans in reality. fan_apply_standard_minimum_motor_efficiency(fan, fan_brake_horsepower(fan)) # Calculate a new pressure rise to hit the target W/cfm fan_tot_eff = fan.fanEfficiency fan_rise_new_pa = fan_efficacy_w_per_m3_per_s * fan_tot_eff fan.setPressureRise(fan_rise_new_pa) # Calculate the newly set efficacy fan_power_new_w = fan_rise_new_pa * max_air_flow_rate / fan_tot_eff fan_efficacy_new_w_per_cfm = fan_power_new_w / max_air_flow_rate_cfm OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.ZoneHVACComponent', "For #{zone_hvac_component.name}: fan efficacy set to #{fan_efficacy_new_w_per_cfm.round(2)} W/cfm.") return true end |