Merge pull request #1840 from NREL/data_update_bea47dc

Building Energy Standards Economizers Data Update

data/standards/manage_OpenStudio_Standards.rb

@@ -131,9 +131,7 @@ def unique_properties(sheet_name)
          when 'refrigeration_compressors'
            ['template', 'compressor_name', 'compressor_type']
          when 'economizers'
-           ['template', 'climate_zone', 'data_center']
-         when 'prm_economizers'
-           ['template', 'climate_ID']
+           ['climate_zone', 'data_center', 'minimum_capacity', 'fan_cooling_application', 'minimum_water_cooled_chilled_water_capacity_no_fan_cooling', 'minimum_air_cooled_chilled_water_or_district_chilled_water_capacity_no_fan_cooling', 'fixed_dry_bulb_is_allowed', 'differential_dry_bulb_is_allowed', 'electronic_enthalpy_is_allowed', 'differential_enthalpy_is_allowed', 'dew_point_dry_bulb_is_allowed', 'fixed_enthalpy_is_allowed', 'fixed_enthalpy_fixed_dry_bulb_is_allowed', 'differential_enthalpy_fixed_dry_bulb_is_allowed', 'fixed_dry_bulb_high_limit_shutoff_temp', 'fixed_enthalpy_high_limit_shutoff_enthalpy', 'dew_point_dry_bulb_high_limit_shutoff_dew_point_temp', 'dew_point_dry_bulb_high_limit_shutoff_dry_bulb_temp', 'fixed_enthalpy_fixed_dry_bulb_high_limit_shutoff_enthalpy', 'fixed_enthalpy_fixed_dry_bulb_high_limit_shutoff_dry_bulb_temp', 'differential_enthalpy_fixed_dry_bulb_high_limit_shutoff_dry_bulb_temp', 'percent_increase_cooling_efficiency_eliminate_requirement', 'heat_recovery_exempted']
          when 'motors'
            ['template', 'number_of_poles', 'type', 'synchronous_speed', 'minimum_capacity', 'maximum_capacity']
          when 'ground_temperatures'

lib/openstudio-standards/prototypes/common/objects/Prototype.Model.rb

@@ -2019,6 +2019,9 @@ def apply_economizers(climate_zone, model)
     econ_max_70_pct_oa_sch.defaultDaySchedule.setName('Economizer Max OA Fraction 70 pct Default')
     econ_max_70_pct_oa_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), 0.7)
 
+    # Store original climate zones
+    climate_zone_code = climate_zone
+
     # Check each airloop
     model.getAirLoopHVACs.sort.each do |air_loop|
       economizer_required = false
@@ -2050,14 +2053,19 @@ def apply_economizers(climate_zone, model)
         # specified, economizer requirements were aimed at comfort
         # cooling, not computer room cooling (as per input from the MSC).
 
+        # Process climate zone:
+        # Moisture regime is not needed for climate zone 8
+        climate_zone = climate_zone.split('-')[-1]
+        climate_zone = '8' if climate_zone.include?('8')
+
         # Get the size threshold requirement
         search_criteria = {
           'template' => template,
           'climate_zone' => climate_zone,
           'data_center' => true
         }
         econ_limits = model_find_object(standards_data['economizers'], search_criteria)
-        minimum_capacity_btu_per_hr = econ_limits['capacity_limit']
+        minimum_capacity_btu_per_hr = econ_limits['minimum_capacity']
         economizer_required = !minimum_capacity_btu_per_hr.nil?
       elsif @instvarbuilding_type == 'LargeOffice' && air_loop_hvac_include_wshp?(air_loop)
         # WSHP serving the IT closets are assumed to always be too
@@ -2070,7 +2078,7 @@ def apply_economizers(climate_zone, model)
       if economizer_required
         # If an economizer is required, determine the economizer type
         # in the prototype buildings, which depends on climate zone.
-        economizer_type = model_economizer_type(model, climate_zone)
+        economizer_type = model_economizer_type(model, climate_zone_code)
 
         # Set the economizer type
         # Get the OA system and OA controller
@@ -2087,7 +2095,7 @@ def apply_economizers(climate_zone, model)
 
         # Check that the economizer type set by the prototypes
         # is not prohibited by code.  If it is, change to no economizer.
-        unless air_loop_hvac_economizer_type_allowable?(air_loop, climate_zone)
+        unless air_loop_hvac_economizer_type_allowable?(air_loop, climate_zone_code)
           OpenStudio.logFree(OpenStudio::Warn, 'openstudio.prototype.Model', "#{air_loop.name} is required to have an economizer, but the type chosen, #{economizer_type} is prohibited by code for climate zone #{climate_zone}. Economizer type will be switched to No Economizer.")
           oa_control.setEconomizerControlType('NoEconomizer')
         end

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

@@ -965,6 +965,11 @@ def air_loop_hvac_economizer_required?(air_loop_hvac, climate_zone)
       is_dc = true
     end
 
+    # Process climate zone:
+    # Moisture regime is not needed for climate zone 8
+    climate_zone = climate_zone.split('-')[-1]
+    climate_zone = '8' if climate_zone.include?('8')
+
     # Retrieve economizer limits from JSON
     search_criteria = {
       'template' => template,
@@ -978,7 +983,7 @@ def air_loop_hvac_economizer_required?(air_loop_hvac, climate_zone)
     end
 
     # Determine the minimum capacity and whether or not it is a data center
-    minimum_capacity_btu_per_hr = econ_limits['capacity_limit']
+    minimum_capacity_btu_per_hr = econ_limits['minimum_capacity']
 
     # A big number of btu per hr as the minimum requirement if nil in spreadsheet
     infinity_btu_per_hr = 999_999_999_999
@@ -1115,17 +1120,22 @@ def air_loop_hvac_economizer_limits(air_loop_hvac, climate_zone)
     when 'NoEconomizer'
       return [nil, nil, nil]
     when 'FixedDryBulb'
+      # Process climate zone:
+      # Moisture regime is not needed for climate zone 8
+      climate_zone = climate_zone.split('-')[-1]
+      climate_zone = '8' if climate_zone.include?('8')
+
       search_criteria = {
         'template' => template,
         'climate_zone' => climate_zone
       }
       econ_limits = model_find_object(standards_data['economizers'], search_criteria)
       drybulb_limit_f = econ_limits['fixed_dry_bulb_high_limit_shutoff_temp']
     when 'FixedEnthalpy'
-      enthalpy_limit_btu_per_lb = 28
+      enthalpy_limit_btu_per_lb = 28.0
     when 'FixedDewPointAndDryBulb'
-      drybulb_limit_f = 75
-      dewpoint_limit_f = 55
+      drybulb_limit_f = 75.0
+      dewpoint_limit_f = 55.0
     end
 
     return [drybulb_limit_f, enthalpy_limit_btu_per_lb, dewpoint_limit_f]