Merge pull request #1558 from NREL/deer_ventilation_rates

Deer ventilation rates

lib/openstudio-standards.rb

@@ -354,6 +354,26 @@ module OpenstudioStandards
   require_relative "#{stds}/deer/deer.AirLoopHVAC"
   require_relative "#{stds}/deer/deer.Space"
   require_relative "#{stds}/deer/deer.PlanarSurface"
+  # DEER 2003
+  require_relative "#{stds}/deer/deer_2003/deer_2003.ThermalZone"
+  # DEER 2007
+  require_relative "#{stds}/deer/deer_2007/deer_2007.ThermalZone"
+  # DEER 2011
+  require_relative "#{stds}/deer/deer_2011/deer_2011.ThermalZone"
+  # DEER 2014
+  require_relative "#{stds}/deer/deer_2014/deer_2014.Space"
+  require_relative "#{stds}/deer/deer_2014/deer_2014.ThermalZone"
+  # DEER 2015
+  require_relative "#{stds}/deer/deer_2015/deer_2015.Space"
+  require_relative "#{stds}/deer/deer_2015/deer_2015.ThermalZone"
+  # DEER 2017
+  require_relative "#{stds}/deer/deer_2017/deer_2017.Space"
+  require_relative "#{stds}/deer/deer_2017/deer_2017.ThermalZone"
+  # DEER 2020
+  require_relative "#{stds}/deer/deer_2020/deer_2020.AirLoopHVAC"
+  require_relative "#{stds}/deer/deer_2020/deer_2020.FanVariableVolume"
+  require_relative "#{stds}/deer/deer_2020/deer_2020.Space"
+  require_relative "#{stds}/deer/deer_2020/deer_2020.ThermalZone"
   # CBES Common
   require_relative "#{stds}/cbes/cbes.AirLoopHVAC"
   require_relative "#{stds}/cbes/cbes.Model"

lib/openstudio-standards/standards/Standards.ThermalZone.rb

@@ -1778,6 +1778,7 @@ def thermal_zone_demand_control_ventilation_required?(thermal_zone, climate_zone
 
     # Not required if both limits nil
     if min_area_m2.nil? && min_area_m2_per_occ.nil?
+      OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.ThermalZone', "For #{thermal_zone.name}: DCV is not required due to lack of minimum area requirements.")
       return dcv_required
     end
 

lib/openstudio-standards/standards/deer/deer.AirLoopHVAC.rb

@@ -11,6 +11,28 @@ def air_loop_hvac_unoccupied_fan_shutoff_required?(air_loop_hvac)
     return shutoff_required
   end
 
+  # 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.
+  # The small numbers here are to reflect that there is not a minimum
+  # airflow requirement in Title 24.
+  # @return [Array<Double>] [min_oa_without_economizer_cfm, min_oa_with_economizer_cfm]
+  def air_loop_hvac_demand_control_ventilation_limits(air_loop_hvac)
+    min_oa_without_economizer_cfm = 0.01
+    min_oa_with_economizer_cfm = 0.01
+    return [min_oa_without_economizer_cfm, min_oa_with_economizer_cfm]
+  end
+
+  # Determine if the standard has an exception for demand control ventilation
+  # when an energy recovery device is present.
+  # Unlike ASHRAE 90.1, Title 24 does not have an ERV exception to DCV.
+  # This method is a copy of what is in Standards.AirLoopHVAC.rb and ensures
+  # ERVs will not prevent DCV from being applied to DEER models.
+  def air_loop_hvac_dcv_required_when_erv(air_loop_hvac)
+    dcv_required_when_erv_present = true
+    return dcv_required_when_erv_present
+  end
+
   # Determine whether or not this system is required to have an economizer.
   # Logic inferred from MASControl3 INP files and parameters database.
   #
@@ -126,7 +148,6 @@ def air_loop_hvac_economizer_type_allowable?(air_loop_hvac, climate_zone)
 
   # Determine the limits for the type of economizer present on the AirLoopHVAC, if any.
   # Enthalpy limit is from MASControl3.
-  #
   # @param air_loop_hvac [OpenStudio::Model::AirLoopHVAC] air loop
   # @param climate_zone [String] ASHRAE climate zone, e.g. 'ASHRAE 169-2013-4A'
   # @return [Array<Double>] [drybulb_limit_f, enthalpy_limit_btu_per_lb, dewpoint_limit_f]

lib/openstudio-standards/standards/deer/deer_2003/deer_2003.ThermalZone.rb

@@ -1,21 +1,22 @@
 class DEER2003 < DEER
-    # @!group ThermalZone
-  
-    # Determine the area and occupancy level limits for
-    # demand control ventilation.
-    #
-    # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
-    # @return [Array<Double>] the minimum area, in m^2
-    # and the minimum occupancy density in m^2/person.  Returns nil
-    # if there is no requirement.
-    def thermal_zone_demand_control_ventilation_limits(thermal_zone)
-      min_area_ft2 = nil # No minimum area
-      min_ft2_per_occ = 40
-      
-      # Convert to SI
-      min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
-
-      return [min_area_ft2, min_m2_per_occ]
-    end
+  # @!group ThermalZone
+
+  # Determine the area and occupancy level limits for
+  # demand control ventilation.
+  #
+  # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
+  # @return [Array<Double>] the minimum area, in m^2
+  # and the minimum occupancy density in m^2/person.  Returns nil
+  # if there is no requirement.
+  def thermal_zone_demand_control_ventilation_limits(thermal_zone)
+    min_area_ft2 = nil # No minimum area
+    min_ft2_per_occ = 40
+
+    # Convert to SI
+    min_area_m2 = min_area_ft2
+    min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
+
+    return [min_area_m2, min_m2_per_occ]
   end
 end
+

lib/openstudio-standards/standards/deer/deer_2007/deer_2007.ThermalZone.rb

@@ -1,21 +1,22 @@
 class DEER2007 < DEER
-    # @!group ThermalZone
-  
-    # Determine the area and occupancy level limits for
-    # demand control ventilation.
-    #
-    # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
-    # @return [Array<Double>] the minimum area, in m^2
-    # and the minimum occupancy density in m^2/person.  Returns nil
-    # if there is no requirement.
-    def thermal_zone_demand_control_ventilation_limits(thermal_zone)
-      min_area_ft2 = nil # No minimum area
-      min_ft2_per_occ = 40
-      
-      # Convert to SI
-      min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
-
-      return [min_area_ft2, min_m2_per_occ]
-    end
+  # @!group ThermalZone
+
+  # Determine the area and occupancy level limits for
+  # demand control ventilation.
+  #
+  # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
+  # @return [Array<Double>] the minimum area, in m^2
+  # and the minimum occupancy density in m^2/person.  Returns nil
+  # if there is no requirement.
+  def thermal_zone_demand_control_ventilation_limits(thermal_zone)
+    min_area_ft2 = nil # No minimum area
+    min_ft2_per_occ = 40
+
+    # Convert to SI
+    min_area_m2 = min_area_ft2
+    min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
+
+    return [min_area_m2, min_m2_per_occ]
   end
 end
+

lib/openstudio-standards/standards/deer/deer_2011/deer_2011.ThermalZone.rb

@@ -1,21 +1,22 @@
 class DEER2011 < DEER
-    # @!group ThermalZone
-  
-    # Determine the area and occupancy level limits for
-    # demand control ventilation.
-    #
-    # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
-    # @return [Array<Double>] the minimum area, in m^2
-    # and the minimum occupancy density in m^2/person.  Returns nil
-    # if there is no requirement.
-    def thermal_zone_demand_control_ventilation_limits(thermal_zone)
-      min_area_ft2 = nil # No minimum area
-      min_ft2_per_occ = 40
-      
-      # Convert to SI
-      min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
-
-      return [min_area_ft2, min_m2_per_occ]
-    end
+  # @!group ThermalZone
+
+  # Determine the area and occupancy level limits for
+  # demand control ventilation.
+  #
+  # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
+  # @return [Array<Double>] the minimum area, in m^2
+  # and the minimum occupancy density in m^2/person.  Returns nil
+  # if there is no requirement.
+  def thermal_zone_demand_control_ventilation_limits(thermal_zone)
+    min_area_ft2 = 150
+    min_ft2_per_occ = 40
+
+    # Convert to SI
+    min_area_m2 = OpenStudio.convert(min_area_ft2, 'ft^2', 'm^2').get
+    min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
+
+    return [min_area_m2, min_m2_per_occ]
   end
 end
+

lib/openstudio-standards/standards/deer/deer_2014/deer_2014.ThermalZone.rb

@@ -1,21 +1,22 @@
 class DEER2014 < DEER
-    # @!group ThermalZone
-  
-    # Determine the area and occupancy level limits for
-    # demand control ventilation.
-    #
-    # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
-    # @return [Array<Double>] the minimum area, in m^2
-    # and the minimum occupancy density in m^2/person.  Returns nil
-    # if there is no requirement.
-    def thermal_zone_demand_control_ventilation_limits(thermal_zone)
-      min_area_ft2 = nil # No minimum area
-      min_ft2_per_occ = 40
-      
-      # Convert to SI
-      min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
-
-      return [min_area_ft2, min_m2_per_occ]
-    end
+  # @!group ThermalZone
+
+  # Determine the area and occupancy level limits for
+  # demand control ventilation.
+  #
+  # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
+  # @return [Array<Double>] the minimum area, in m^2
+  # and the minimum occupancy density in m^2/person.  Returns nil
+  # if there is no requirement.
+  def thermal_zone_demand_control_ventilation_limits(thermal_zone)
+    min_area_ft2 = 150
+    min_ft2_per_occ = 40
+
+    # Convert to SI
+    min_area_m2 = OpenStudio.convert(min_area_ft2, 'ft^2', 'm^2').get
+    min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
+
+    return [min_area_m2, min_m2_per_occ]
   end
 end
+

lib/openstudio-standards/standards/deer/deer_2015/deer_2015.ThermalZone.rb

@@ -1,21 +1,22 @@
 class DEER2015 < DEER
-    # @!group ThermalZone
-  
-    # Determine the area and occupancy level limits for
-    # demand control ventilation.
-    #
-    # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
-    # @return [Array<Double>] the minimum area, in m^2
-    # and the minimum occupancy density in m^2/person.  Returns nil
-    # if there is no requirement.
-    def thermal_zone_demand_control_ventilation_limits(thermal_zone)
-      min_area_ft2 = nil # No minimum area
-      min_ft2_per_occ = 40
-      
-      # Convert to SI
-      min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
-
-      return [min_area_ft2, min_m2_per_occ]
-    end
+  # @!group ThermalZone
+
+  # Determine the area and occupancy level limits for
+  # demand control ventilation.
+  #
+  # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
+  # @return [Array<Double>] the minimum area, in m^2
+  # and the minimum occupancy density in m^2/person.  Returns nil
+  # if there is no requirement.
+  def thermal_zone_demand_control_ventilation_limits(thermal_zone)
+    min_area_ft2 = 150
+    min_ft2_per_occ = 40
+
+    # Convert to SI
+    min_area_m2 = OpenStudio.convert(min_area_ft2, 'ft^2', 'm^2').get
+    min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
+
+    return [min_area_m2, min_m2_per_occ]
   end
 end
+

lib/openstudio-standards/standards/deer/deer_2017/deer_2017.ThermalZone.rb

@@ -1,21 +1,22 @@
 class DEER2017 < DEER
-    # @!group ThermalZone
-  
-    # Determine the area and occupancy level limits for
-    # demand control ventilation.
-    #
-    # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
-    # @return [Array<Double>] the minimum area, in m^2
-    # and the minimum occupancy density in m^2/person.  Returns nil
-    # if there is no requirement.
-    def thermal_zone_demand_control_ventilation_limits(thermal_zone)
-      min_area_ft2 = nil # No minimum area
-      min_ft2_per_occ = 40
-      
-      # Convert to SI
-      min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
-
-      return [min_area_ft2, min_m2_per_occ]
-    end
+  # @!group ThermalZone
+
+  # Determine the area and occupancy level limits for
+  # demand control ventilation.
+  #
+  # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
+  # @return [Array<Double>] the minimum area, in m^2
+  # and the minimum occupancy density in m^2/person.  Returns nil
+  # if there is no requirement.
+  def thermal_zone_demand_control_ventilation_limits(thermal_zone)
+    min_area_ft2 = 150
+    min_ft2_per_occ = 40
+
+    # Convert to SI
+    min_area_m2 = OpenStudio.convert(min_area_ft2, 'ft^2', 'm^2').get
+    min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
+
+    return [min_area_m2, min_m2_per_occ]
   end
 end
+

lib/openstudio-standards/standards/deer/deer_2020/deer_2020.AirLoopHVAC.rb

@@ -40,4 +40,14 @@ def air_loop_hvac_demand_control_ventilation_limits(air_loop_hvac)
     min_oa_with_economizer_cfm = 0
     return [min_oa_without_economizer_cfm, min_oa_with_economizer_cfm]
   end
-end
+
+  # Determine if the standard has an exception for demand control ventilation
+  # when an energy recovery device is present.
+  # Unlike ASHRAE 90.1, Title 24 does not have an ERV exception to DCV.
+  # This method is a copy of what is in Standards.AirLoopHVAC.rb and ensures
+  # ERVs will not prevent DCV from being applied to DEER models.
+  def air_loop_hvac_dcv_required_when_erv(air_loop_hvac)
+    dcv_required_when_erv_present = true
+    return dcv_required_when_erv_present
+  end
+end

lib/openstudio-standards/standards/deer/deer_2020/deer_2020.ThermalZone.rb

@@ -1,21 +1,22 @@
 class DEER2020 < DEER
-    # @!group ThermalZone
-  
-    # Determine the area and occupancy level limits for
-    # demand control ventilation.
-    #
-    # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
-    # @return [Array<Double>] the minimum area, in m^2
-    # and the minimum occupancy density in m^2/person.  Returns nil
-    # if there is no requirement.
-    def thermal_zone_demand_control_ventilation_limits(thermal_zone)
-      min_area_ft2 = nil # No minimum area
-      min_ft2_per_occ = 40
-      
-      # Convert to SI
-      min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
-
-      return [min_area_ft2, min_m2_per_occ]
-    end
+  # @!group ThermalZone
+
+  # Determine the area and occupancy level limits for
+  # demand control ventilation.
+  #
+  # @param thermal_zone [OpenStudio::Model::ThermalZone] the thermal zone
+  # @return [Array<Double>] the minimum area, in m^2
+  # and the minimum occupancy density in m^2/person.  Returns nil
+  # if there is no requirement.
+  def thermal_zone_demand_control_ventilation_limits(thermal_zone)
+    min_area_ft2 = 150
+    min_ft2_per_occ = 40
+
+    # Convert to SI
+    min_area_m2 = OpenStudio.convert(min_area_ft2, 'ft^2', 'm^2').get
+    min_m2_per_occ = OpenStudio.convert(min_ft2_per_occ, 'ft^2', 'm^2').get
+
+    return [min_area_m2, min_m2_per_occ]
   end
 end
+