Class: OpenStudio::Model::SizingSystem

Inherits:
Object
  • Object
show all
Defined in:
lib/openstudio-standards/hvac_sizing/Siz.SizingSystem.rb

Overview

open the class to add methods to return sizing values

Instance Method Summary collapse

Instance Method Details

#applySizingValues ⇒ Object

Takes the values calculated by the EnergyPlus sizing routines and puts them into this object model in place of the autosized fields. Must have previously completed a run with sql output for this to work.



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# File 'lib/openstudio-standards/hvac_sizing/Siz.SizingSystem.rb', line 13

def applySizingValues

  # In OpenStudio, the design OA flow rates are calculated by the
  # Controller:OutdoorAir object associated with this system.
  # Therefore, this property will be retrieved from that object's sizing values
  air_loop = self.airLoopHVAC
  if air_loop.airLoopHVACOutdoorAirSystem.is_initialized
    controller_oa = air_loop.airLoopHVACOutdoorAirSystem.get.getControllerOutdoorAir
    # get the max oa flow rate from the controller:outdoor air sizing
    maximum_outdoor_air_flow_rate = controller_oa.autosizedMaximumOutdoorAirFlowRate
    if maximum_outdoor_air_flow_rate.is_initialized
      self.setDesignOutdoorAirFlowRate(maximum_outdoor_air_flow_rate.get)
      # Set the OA flow method to "ZoneSum" to avoid severe errors
      # in the fully hard-sized model.
      self.setSystemOutdoorAirMethod("ZoneSum")
    end
  end
  
end

#autosize ⇒ Object

Sets all auto-sizeable fields to autosize



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# File 'lib/openstudio-standards/hvac_sizing/Siz.SizingSystem.rb', line 6

def autosize
  self.autosizeDesignOutdoorAirFlowRate
end

#autosizedMaximumOutdoorAirFlowRate ⇒ Object

returns the autosized maximum outdoor air flow rate as an optional double



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# File 'lib/openstudio-standards/hvac_sizing/Siz.SizingSystem.rb', line 34

def autosizedMaximumOutdoorAirFlowRate

  return self.model.getAutosizedValue(self, 'Maximum Outdoor Air Flow Rate', 'm3/s')
  
end

#autosizedMinimumOutdoorAirFlowRate ⇒ Object

returns the autosized minimum outdoor air flow rate as an optional double



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# File 'lib/openstudio-standards/hvac_sizing/Siz.SizingSystem.rb', line 41

def autosizedMinimumOutdoorAirFlowRate

  return self.model.getAutosizedValue(self, 'Minimum Outdoor Air Flow Rate', 'm3/s')
  
end