Module: Hospital

Defined in:
lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb

Overview

Custom changes for the Hospital prototype. These are changes that are inconsistent with other prototype building types.

Instance Method Summary collapse

Instance Method Details

#add_extra_equip_kitchen(model) ⇒ Object

add extra equipment for kitchen



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 128

def add_extra_equip_kitchen(model)
  kitchen_space = model.getSpaceByName('Kitchen_Flr_5')
  kitchen_space = kitchen_space.get
  kitchen_space_type = kitchen_space.spaceType.get
  elec_equip_def1 = OpenStudio::Model::ElectricEquipmentDefinition.new(model)
  elec_equip_def2 = OpenStudio::Model::ElectricEquipmentDefinition.new(model)
  elec_equip_def1.setName('Kitchen Electric Equipment Definition1')
  elec_equip_def2.setName('Kitchen Electric Equipment Definition2')
  case template
    when '90.1-2004', '90.1-2007', '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
      elec_equip_def1.setFractionLatent(0)
      elec_equip_def1.setFractionRadiant(0.25)
      elec_equip_def1.setFractionLost(0)
      elec_equip_def2.setFractionLatent(0)
      elec_equip_def2.setFractionRadiant(0.25)
      elec_equip_def2.setFractionLost(0)
      if template == '90.1-2013' || template == '90.1-2016' || template == '90.1-2019'
        elec_equip_def1.setDesignLevel(915)
        elec_equip_def2.setDesignLevel(855)
      else
        elec_equip_def1.setDesignLevel(915)
        elec_equip_def2.setDesignLevel(855)
      end
      # Create the electric equipment instance and hook it up to the space type
      elec_equip1 = OpenStudio::Model::ElectricEquipment.new(elec_equip_def1)
      elec_equip2 = OpenStudio::Model::ElectricEquipment.new(elec_equip_def2)
      elec_equip1.setName('Kitchen_Reach-in-Freezer')
      elec_equip2.setName('Kitchen_Reach-in-Refrigerator')
      elec_equip1.setSpaceType(kitchen_space_type)
      elec_equip2.setSpaceType(kitchen_space_type)
      elec_equip1.setSchedule(model_add_schedule(model, 'Hospital ALWAYS_ON'))
      elec_equip2.setSchedule(model_add_schedule(model, 'Hospital ALWAYS_ON'))
  end
end

#add_humidifier(space_name, hot_water_loop, model) ⇒ Object 



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 212

def add_humidifier(space_name, hot_water_loop, model)
  space = model.getSpaceByName(space_name).get
  zone = space.thermalZone.get
  humidistat = OpenStudio::Model::ZoneControlHumidistat.new(model)
  humidistat.setHumidifyingRelativeHumiditySetpointSchedule(model_add_schedule(model, 'Hospital MinRelHumSetSch'))
  humidistat.setDehumidifyingRelativeHumiditySetpointSchedule(model_add_schedule(model, 'Hospital MaxRelHumSetSch'))
  zone.setZoneControlHumidistat(humidistat)

  model.getAirLoopHVACs.sort.each do |air_loop|
    if air_loop.thermalZones.include? zone
      humidifier = OpenStudio::Model::HumidifierSteamElectric.new(model)
      humidifier.setRatedCapacity(3.72E-5)
      humidifier.setRatedPower(100_000)
      humidifier.setName("#{air_loop.name.get} Electric Steam Humidifier")
      # get the water heating coil and add humidifier to the outlet of heating coil (right before fan)
      htg_coil = nil
      air_loop.supplyComponents.each do |equip|
        if equip.to_CoilHeatingWater.is_initialized
          htg_coil = equip.to_CoilHeatingWater.get
        end
      end
      heating_coil_outlet_node = htg_coil.airOutletModelObject.get.to_Node.get
      supply_outlet_node = air_loop.supplyOutletNode
      humidifier.addToNode(heating_coil_outlet_node)
      humidity_spm = OpenStudio::Model::SetpointManagerSingleZoneHumidityMinimum.new(model)
      case template
      when '90.1-2004', '90.1-2007', '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
        create_coil_heating_electric(model,
                                     air_loop_node: supply_outlet_node,
                                     name: "#{space_name} Electric Htg Coil")
        create_coil_heating_water(model,
                                  hot_water_loop,
                                  air_loop_node: supply_outlet_node,
                                  name: "#{space_name} Water Htg Coil")
      end
      # humidity_spm.addToNode(supply_outlet_node)
      humidity_spm.addToNode(humidifier.outletModelObject.get.to_Node.get)
      humidity_spm.setControlZone(zone)
    end
  end
end

#air_loop_hvac_supply_air_temperature_reset_type(air_loop_hvac) ⇒ String

Type of SAT reset for this building type

Parameters:

  • air_loop_hvac (OpenStudio::model::AirLoopHVAC) —

    Airloop

Returns:

  • (String) —

    Returns type of SAT reset



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 347

def air_loop_hvac_supply_air_temperature_reset_type(air_loop_hvac)
  return 'oa'
end

#air_terminal_single_duct_vav_reheat_apply_initial_prototype_damper_position(air_terminal_single_duct_vav_reheat, zone_oa_per_area) ⇒ Object 



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 334

def air_terminal_single_duct_vav_reheat_apply_initial_prototype_damper_position(air_terminal_single_duct_vav_reheat, zone_oa_per_area)
  min_damper_position = template == '90.1-2010' || template == '90.1-2013' || template == '90.1-2016' || template == '90.1-2019' ? 0.2 : 0.3

  # Set the minimum flow fraction
  air_terminal_single_duct_vav_reheat.setConstantMinimumAirFlowFraction(min_damper_position)

  return true
end

#model_add_daylighting_controls(model) ⇒ Object 



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 254

def model_add_daylighting_controls(model)
  space_names = ['Office1_Flr_5', 'Office3_Flr_5', 'Lobby_Records_Flr_1']
  space_names.each do |space_name|
    space = model.getSpaceByName(space_name).get
    space_add_daylighting_controls(space, false, false)
  end
end

#model_adjust_vav_minimum_damper(model) ⇒ Object

For operating room 1&2 in 2010 and 2013, VAV minimum air flow is set by schedule



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 263

def model_adjust_vav_minimum_damper(model)
  model.getThermalZones.each do |zone|
    air_terminal = zone.airLoopHVACTerminal
    if air_terminal.is_initialized
      air_terminal = air_terminal.get
      if air_terminal.to_AirTerminalSingleDuctVAVReheat.is_initialized
        air_terminal = air_terminal.to_AirTerminalSingleDuctVAVReheat.get
        vav_name = air_terminal.name.get
        # 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.
        zone_oa_per_area = thermal_zone_outdoor_airflow_rate_per_area(zone)
        airlp = air_terminal.airLoopHVAC.get
        case template
        when 'DOE Ref Pre-1980', 'DOE Ref 1980-2004'
          if vav_name.include?('PatRoom') || vav_name.include?('OR') || vav_name.include?('ICU') || vav_name.include?('Lab') || vav_name.include?('ER') || vav_name.include?('Kitchen')
            air_terminal.setConstantMinimumAirFlowFraction(1.0)
          end
        # Minimum damper position for Outpatient prototype
        # Based on AIA 2001 ventilation requirements
        # See Section 5.2.2.16 in Thornton et al. 2010
        # https://www.energycodes.gov/sites/default/files/documents/BECP_Energy_Cost_Savings_STD2010_May2011_v00.pdf
        when '90.1-2004', '90.1-2007'
          air_terminal.setConstantMinimumAirFlowFraction(1.0) unless airlp.name.to_s.include?('VAV_1') || airlp.name.to_s.include?('VAV_2')
        when '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
          air_terminal.setConstantMinimumAirFlowFraction(1.0) unless airlp.name.to_s.include?('VAV_1') || airlp.name.to_s.include?('VAV_2')
          air_terminal.setConstantMinimumAirFlowFraction(0.5) if vav_name.include? 'PatRoom'
        end
      end
    end
  end
end

#model_custom_geometry_tweaks(building_type, climate_zone, prototype_input, model) ⇒ Object 



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 327

def model_custom_geometry_tweaks(building_type, climate_zone, prototype_input, model)
  # Set original building North axis
  model_set_building_north_axis(model, 0.0)

  return true
end

#model_custom_hvac_tweaks(building_type, climate_zone, prototype_input, model) ⇒ Object 



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 5

def model_custom_hvac_tweaks(building_type, climate_zone, prototype_input, model)
  OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Started building type specific HVAC adjustments')

  # add transformer
  # efficiency based on a 500 kVA transformer
  case template
  when '90.1-2004', '90.1-2007'
    transformer_efficiency = 0.979
  when '90.1-2010', '90.1-2013'
    transformer_efficiency = 0.987
  when '90.1-2016', '90.1-2019'
    transformer_efficiency = 0.991
  else
    transformer_efficiency = nil
  end

  unless transformer_efficiency.nil?
    model_add_transformer(model,
                          wired_lighting_frac: 0.022,
                          transformer_size: 500000,
                          transformer_efficiency: transformer_efficiency)
  end

  # add extra equipment for kitchen
  add_extra_equip_kitchen(model)

  system_to_space_map = define_hvac_system_map(building_type, climate_zone)

  hot_water_loop = nil
  model.getPlantLoops.sort.each do |loop|
    # If it has a boiler:hotwater, it is the correct loop
    unless loop.supplyComponents('OS:Boiler:HotWater'.to_IddObjectType).empty?
      hot_water_loop = loop
    end
  end
  if hot_water_loop
    case template
      when '90.1-2004', '90.1-2007', '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
        space_names = ['ER_Exam3_Mult4_Flr_1', 'OR2_Mult5_Flr_2', 'ICU_Flr_2', 'PatRoom5_Mult10_Flr_4', 'Lab_Flr_3']
        space_names.each do |space_name|
          add_humidifier(space_name, hot_water_loop, model)
        end
      when 'DOE Ref Pre-1980', 'DOE Ref 1980-2004'
        space_names = ['ER_Exam3_Mult4_Flr_1', 'OR2_Mult5_Flr_2']
        space_names.each do |space_name|
          add_humidifier(space_name, hot_water_loop, model)
        end
    end
  else
    OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', 'Could not find hot water loop to attach humidifier to.')
  end

  # adjust minimum damper positions
  model_adjust_vav_minimum_damper(model)

  reset_kitchen_oa(model)
  model_update_exhaust_fan_efficiency(model)
  model_reset_or_room_vav_minimum_damper(prototype_input, model)

  # adjust CAV system sizing
  model.getAirLoopHVACs.each do |air_loop|
    if air_loop.name.to_s.include? 'CAV_KITCHEN'
      # system sizing
      sizing_system = air_loop.sizingSystem
      prehtg_sa_temp_c = OpenStudio.convert(55.04, 'F', 'C').get
      htg_sa_temp_c = OpenStudio.convert(104.0, 'F', 'C').get
      sizing_system.setPreheatDesignTemperature(prehtg_sa_temp_c)
      sizing_system.setCentralHeatingDesignSupplyAirTemperature(htg_sa_temp_c)
      sizing_system.setSizingOption('NonCoincident')

      # set coil sizing
      htg_coil = model.getCoilHeatingWaterByName('CAV_KITCHEN Main Htg Coil').get
      htg_coil.setRatedInletAirTemperature(prehtg_sa_temp_c)
      htg_coil.setRatedOutletAirTemperature(htg_sa_temp_c)

      # replace main supply air fan
      air_loop.supplyFan.get.remove
      fan = create_fan_by_name(model,
                               'Hospital_CAV_Sytem_Fan',
                               fan_name: "#{air_loop.name} Fan",
                               end_use_subcategory: 'CAV System Fans')
      fan.setAvailabilitySchedule(model.alwaysOnDiscreteSchedule)
      fan.addToNode(air_loop.supplyOutletNode)

      # replace AirTerminalSingleDuctVAVReheat with AirTerminalSingleDuctUncontrolled
      air_loop.thermalZones.each do |zone|
        # remove old terminal and reheat coil
        old_terminal = zone.airLoopHVACTerminal.get.to_AirTerminalSingleDuctVAVReheat.get
        reheat_coil = old_terminal.reheatCoil
        reheat_coil.remove
        # in future, may need to remove plant loop if empty at end of this
        old_terminal.remove
        air_loop.removeBranchForZone(zone)

        # make new terminal
        new_terminal = OpenStudio::Model::AirTerminalSingleDuctUncontrolled.new(model, model.alwaysOnDiscreteSchedule)
        new_terminal.setName("#{zone.name} CAV Terminal")
        air_loop.addBranchForZone(zone, new_terminal.to_StraightComponent)
        zone.setCoolingPriority(new_terminal.to_ModelObject.get, 1)
        zone.setHeatingPriority(new_terminal.to_ModelObject.get, 1)
      end

      # zone sizing
      zone_htg_sa_temp_c = OpenStudio.convert(104.0, 'F', 'C').get
      air_loop.thermalZones.each do |zone|
        sizing_zone = zone.sizingZone
        sizing_zone.setZoneHeatingDesignSupplyAirTemperature(zone_htg_sa_temp_c)
      end
    end
  end

  # Modify the condenser water pump
  if template == 'DOE Ref 1980-2004' || template == 'DOE Ref Pre-1980'
    cw_pump = model.getPumpConstantSpeedByName('Condenser Water Loop Constant Pump').get
    cw_pump_head_ft_h2o = 60.0
    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)
  end

  return true
end

#model_custom_swh_tweaks(model, building_type, climate_zone, prototype_input) ⇒ Object 



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 177

def model_custom_swh_tweaks(model, building_type, climate_zone, prototype_input)
  update_waterheater_ambient_parameters(model)

  return true
end

#model_modify_oa_controller(model) ⇒ Object 



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 316

def model_modify_oa_controller(model)
  model.getAirLoopHVACs.sort.each do |air_loop|
    oa_sys = air_loop.airLoopHVACOutdoorAirSystem.get
    oa_control = oa_sys.getControllerOutdoorAir
    case air_loop.name.get
      when 'VAV_ER', 'VAV_ICU', 'VAV_LABS', 'VAV_OR', 'VAV_PATRMS', 'CAV_1', 'CAV_2'
        oa_control.setEconomizerControlType('NoEconomizer')
    end
  end
end

#model_reset_or_room_vav_minimum_damper(prototype_input, model) ⇒ Object 



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 297

def model_reset_or_room_vav_minimum_damper(prototype_input, model)
  case template
  when '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
    model.getAirTerminalSingleDuctVAVReheats.sort.each do |air_terminal|
      air_terminal_name = air_terminal.name.get
      if air_terminal_name.include?('OR1') || air_terminal_name.include?('OR2') || air_terminal_name.include?('OR3') || air_terminal_name.include?('OR4')
        if model.version < OpenStudio::VersionString.new('3.0.1')
          air_terminal.setZoneMinimumAirFlowMethod('Scheduled')
        else
          air_terminal.setZoneMinimumAirFlowInputMethod('Scheduled')
        end
        air_terminal.setMinimumAirFlowFractionSchedule(model_add_schedule(model, 'Hospital OR_MinSA_Sched'))
      end
    end
  else
    return true
  end
end

#model_update_exhaust_fan_efficiency(model) ⇒ Object 



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 197

def model_update_exhaust_fan_efficiency(model)
  case template
    when '90.1-2004', '90.1-2007', '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
      model.getFanZoneExhausts.sort.each do |exhaust_fan|
        exhaust_fan.setFanEfficiency(0.16)
        exhaust_fan.setPressureRise(125)
      end
    when 'DOE Ref Pre-1980', 'DOE Ref 1980-2004'
      model.getFanZoneExhausts.sort.each do |exhaust_fan|
        exhaust_fan.setFanEfficiency(0.338)
        exhaust_fan.setPressureRise(125)
      end
  end
end

#reset_kitchen_oa(model) ⇒ Object

add swh



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 184

def reset_kitchen_oa(model)
  space_kitchen = model.getSpaceByName('Kitchen_Flr_5').get
  ventilation = space_kitchen.designSpecificationOutdoorAir.get
  ventilation.setOutdoorAirFlowperPerson(0)
  ventilation.setOutdoorAirFlowperFloorArea(0)
  case template
    when '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
      ventilation.setOutdoorAirFlowRate(3.398)
    when '90.1-2004', '90.1-2007', 'DOE Ref Pre-1980', 'DOE Ref 1980-2004'
      ventilation.setOutdoorAirFlowRate(3.776)
  end
end

#update_waterheater_ambient_parameters(model) ⇒ Object 



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 163

def update_waterheater_ambient_parameters(model)
  model.getWaterHeaterMixeds.sort.each do |water_heater|
    if water_heater.name.to_s.include?('300gal')
      water_heater.resetAmbientTemperatureSchedule
      water_heater.setAmbientTemperatureIndicator('ThermalZone')
      water_heater.setAmbientTemperatureThermalZone(model.getThermalZoneByName('Basement ZN').get)
    elsif water_heater.name.to_s.include?('6.0gal')
      water_heater.resetAmbientTemperatureSchedule
      water_heater.setAmbientTemperatureIndicator('ThermalZone')
      water_heater.setAmbientTemperatureThermalZone(model.getThermalZoneByName('Kitchen_Flr_5 ZN').get)
    end
  end
end