Module: CoilDX

Included in:
Standard
Defined in:
lib/openstudio-standards/standards/Standards.CoilDX.rb

Overview

A variety of DX coil methods that are the same regardless of coil type. These methods are available to: CoilCoolingDXSingleSpeed, CoilCoolingDXTwoSpeed, CoilCoolingDXMultiSpeed

CoilDX collapse

Instance Method Details

#coil_dx_find_search_criteria(coil_dx, necb_ref_hp = false) ⇒ Hash

Finds the search criteria

Parameters:

  • coil_dx (OpenStudio::Model::StraightComponent) —

    coil cooling object, allowable types: CoilCoolingDXSingleSpeed, CoilCoolingDXTwoSpeed, CoilCoolingDXMultiSpeed

  • necb_ref_hp (Boolean) (defaults to: false) —

    for compatability with NECB ruleset only.

Returns:

  • (Hash) —

    has for search criteria to be used for find object



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# File 'lib/openstudio-standards/standards/Standards.CoilDX.rb', line 172

def coil_dx_find_search_criteria(coil_dx, necb_ref_hp = false)
  search_criteria = {}
  search_criteria['template'] = template

  search_criteria['cooling_type'] = case coil_dx.iddObjectType.valueName.to_s
                                    when 'OS_Coil_Cooling_DX_SingleSpeed',
                                         'OS_Coil_Cooling_DX_TwoSpeed',
                                         'OS_Coil_Cooling_DX_VariableSpeed',
                                         'OS_Coil_Cooling_DX_MultiSpeed',
                                         'OS_AirConditioner_VariableRefrigerantFlow'
                                      coil_dx.condenserType
                                    else
                                      'AirCooled'
                                    end

  # Get the coil_dx_subcategory(coil_dx)
  search_criteria['subcategory'] = coil_dx_subcategory(coil_dx)

  # Add the heating type to the search criteria
  htg_type = coil_dx_heating_type(coil_dx, necb_ref_hp)
  unless htg_type.nil?
    search_criteria['heating_type'] = htg_type
  end

  # The heating side of unitary heat pumps don't have a heating type as part of the search
  if coil_dx.to_CoilHeatingDXSingleSpeed.is_initialized &&
     coil_dx_heat_pump?(coil_dx) &&
     coil_dx.airLoopHVAC.empty? && coil_dx.containingHVACComponent.is_initialized
    containing_comp = coil_dx.containingHVACComponent.get
    if containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAir.is_initialized
      search_criteria['heating_type'] = nil
    end
    # @todo Add other unitary systems
  end

  return search_criteria
end

#coil_dx_heat_pump?(coil_dx) ⇒ Boolean

Determine if it is a heat pump

Parameters:

  • coil_dx (OpenStudio::Model::StraightComponent) —

    coil cooling object, allowable types: CoilCoolingDXSingleSpeed, CoilCoolingDXTwoSpeed, CoilCoolingDXMultiSpeed

Returns:

  • (Boolean) —

    returns true if it is a heat pump, false if not



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# File 'lib/openstudio-standards/standards/Standards.CoilDX.rb', line 49

def coil_dx_heat_pump?(coil_dx)
  heat_pump = false

  if coil_dx.airLoopHVAC.empty?
    if coil_dx.containingHVACComponent.is_initialized
      containing_comp = coil_dx.containingHVACComponent.get
      if containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAir.is_initialized
        heat_pump = true
      elsif containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.is_initialized
        htg_coil = containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.get.heatingCoil
        if htg_coil.to_CoilHeatingDXMultiSpeed.is_initialized then heat_pump = true end
      end
    elsif coil_dx.containingZoneHVACComponent.is_initialized
      containing_comp = coil_dx.containingZoneHVACComponent.get
      # PTHP
      if containing_comp.to_ZoneHVACPackagedTerminalHeatPump.is_initialized
        heat_pump = true
      end
      # @todo Add other zone hvac systems
    end
  else
    if !coil_dx.airLoopHVAC.get.supplyComponents('OS:Coil:Heating:DX:SingleSpeed'.to_IddObjectType).empty? ||
       !coil_dx.airLoopHVAC.get.supplyComponents('OS:Coil:Heating:DX:VariableSpeed'.to_IddObjectType).empty?
      heat_pump = true
    end
  end

  return heat_pump
end

#coil_dx_heating_type(coil_dx, necb_ref_hp = false) ⇒ String

Determine the heating type. Possible choices are: Electric Resistance or None, All Other

Parameters:

  • coil_dx (OpenStudio::Model::StraightComponent) —

    coil cooling object, allowable types: CoilCoolingDXSingleSpeed, CoilCoolingDXTwoSpeed, CoilCoolingDXMultiSpeed

  • necb_ref_hp (Boolean) (defaults to: false) —

    for compatability with NECB ruleset only.

Returns:

  • (String) —

    the heating type



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# File 'lib/openstudio-standards/standards/Standards.CoilDX.rb', line 86

def coil_dx_heating_type(coil_dx, necb_ref_hp = false)
  htg_type = nil

  # If Unitary or Zone HVAC
  if coil_dx.airLoopHVAC.empty?
    if coil_dx.containingHVACComponent.is_initialized
      containing_comp = coil_dx.containingHVACComponent.get
      if containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAir.is_initialized
        htg_type = 'Electric Resistance or None'
      elsif containing_comp.to_AirLoopHVACUnitarySystem.is_initialized
        htg_coil = containing_comp.to_AirLoopHVACUnitarySystem.get.heatingCoil
        if containing_comp.name.to_s.include? 'Minisplit'
          htg_type = 'All Other'
        elsif htg_coil.is_initialized
          htg_coil = htg_coil.get
          if htg_coil.to_CoilHeatingElectric.is_initialized || htg_coil.to_CoilHeatingDXMultiSpeed.is_initialized
            htg_type = 'Electric Resistance or None'
          elsif htg_coil.to_CoilHeatingGas.is_initialized || htg_coil.to_CoilHeatingGasMultiStage.is_initialized
            htg_type = 'All Other'
          end
        else
          htg_type = 'Electric Resistance or None'
        end
      elsif containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.is_initialized
        htg_coil = containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.get.heatingCoil
        supp_htg_coil = containing_comp.to_AirLoopHVACUnitaryHeatPumpAirToAirMultiSpeed.get.supplementalHeatingCoil
        if htg_coil.to_CoilHeatingDXMultiSpeed.is_initialized || supp_htg_coil.to_CoilHeatingElectric.is_initialized
          htg_type = 'Electric Resistance or None'
        elsif htg_coil.to_CoilHeatingGasMultiStage.is_initialized || htg_coil.to_CoilHeatingGas.is_initialized
          htg_type = 'All Other'
        end
      end
      # @todo Add other unitary systems
    elsif coil_dx.containingZoneHVACComponent.is_initialized
      containing_comp = coil_dx.containingZoneHVACComponent.get
      # PTAC
      if containing_comp.to_ZoneHVACPackagedTerminalAirConditioner.is_initialized
        htg_coil = containing_comp.to_ZoneHVACPackagedTerminalAirConditioner.get.heatingCoil
        if htg_coil.to_CoilHeatingElectric.is_initialized
          htg_type = 'Electric Resistance or None'
        elsif htg_coil.to_CoilHeatingWater.is_initialized || htg_coil.to_CoilHeatingGas.is_initialized
          htg_type = 'All Other'
        end
      # PTHP
      elsif containing_comp.to_ZoneHVACPackagedTerminalHeatPump.is_initialized
        htg_type = 'Electric Resistance or None'
      end
      # @todo Add other zone hvac systems
    end
  end

  # If on an AirLoop
  if coil_dx.airLoopHVAC.is_initialized
    air_loop = coil_dx.airLoopHVAC.get
    htg_type = if !air_loop.supplyComponents('OS:Coil:Heating:Gas'.to_IddObjectType).empty?
                 'All Other'
               elsif !air_loop.supplyComponents('OS:Coil:Heating:Water'.to_IddObjectType).empty?
                 'All Other'
               elsif !air_loop.supplyComponents('OS:Coil:Heating:DX:SingleSpeed'.to_IddObjectType).empty?
                 'All Other'
               elsif !air_loop.supplyComponents('OS:Coil:Heating:DX:MultiSpeed'.to_IddObjectType).empty?
                 'All Other'
               elsif !air_loop.supplyComponents('OS:Coil:Heating:DX:VariableSpeed'.to_IddObjectType).empty?
                 'All Other'
               elsif !air_loop.supplyComponents('OS:Coil:Heating:Gas:MultiStage'.to_IddObjectType).empty?
                 'All Other'
               elsif !air_loop.supplyComponents('OS:Coil:Heating:Desuperheater'.to_IddObjectType).empty?
                 'All Other'
               elsif !air_loop.supplyComponents('OS:Coil:Heating:WaterToAirHeatPump:EquationFit'.to_IddObjectType).empty?
                 'All Other'
               elsif !air_loop.supplyComponents('OS:Coil:Heating:Electric'.to_IddObjectType).empty?
                 'Electric Resistance or None'
               else
                 'Electric Resistance or None'
               end
  end

  return htg_type
end

#coil_dx_subcategory(coil_dx) ⇒ String

TODO:

Add add split system vs single package to model object

Finds the subcategory. Possible choices are: Single Package, Split System, PTAC, or PTHP

Parameters:

  • coil_dx (OpenStudio::Model::StraightComponent) —

    coil cooling object, allowable types: CoilCoolingDXSingleSpeed, CoilCoolingDXTwoSpeed, CoilCoolingDXMultiSpeed

Returns:

  • (String) —

    the coil_dx_subcategory(coil_dx)



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# File 'lib/openstudio-standards/standards/Standards.CoilDX.rb', line 14

def coil_dx_subcategory(coil_dx)
  sub_category = 'Single Package'

  # Fallback to the name, mainly for library export
  if coil_dx.name.get.to_s.include?('Single Package')
    sub_category = 'Single Package'
  elsif coil_dx.name.get.to_s.include?('Split System') ||
        coil_dx.name.get.to_s.include?('Central Air Source HP')
    sub_category = 'Split System'
  elsif coil_dx.name.get.to_s.include?('Minisplit HP')
    sub_category = 'Minisplit System'
  elsif coil_dx.name.get.to_s.include?('CRAC')
    sub_category = 'CRAC'
  end

  if coil_dx.airLoopHVAC.empty? && coil_dx.containingZoneHVACComponent.is_initialized
    containing_comp = coil_dx.containingZoneHVACComponent.get
    # PTAC
    if containing_comp.to_ZoneHVACPackagedTerminalAirConditioner.is_initialized
      sub_category = 'PTAC'
    # PTHP
    elsif containing_comp.to_ZoneHVACPackagedTerminalHeatPump.is_initialized
      sub_category = 'PTHP'
    end
    # @todo Add other zone hvac systems
  end

  return sub_category
end