Try using blower fan and airflow cfm, and electric auxiliary energy, …

…for air handler and pump power.
NREL · Nov 5, 2024 · 0d70d4f · 0d70d4f
1 parent b43d482
commit 0d70d4f
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Showing 2 changed files with 13 additions and 5 deletions.
diff --git a/HPXMLtoOpenStudio/measure.xml b/HPXMLtoOpenStudio/measure.xml
@@ -3,8 +3,8 @@
   <schema_version>3.1</schema_version>
   <name>hpxm_lto_openstudio</name>
   <uid>b1543b30-9465-45ff-ba04-1d1f85e763bc</uid>
-  <version_id>69b4f68d-e265-4354-b7ed-9f799f32ce63</version_id>
-  <version_modified>2024-11-05T03:26:45Z</version_modified>
+  <version_id>2fa0362f-43db-4591-9ffb-e6c8b19ea23a</version_id>
+  <version_modified>2024-11-05T03:53:48Z</version_modified>
   <xml_checksum>D8922A73</xml_checksum>
   <class_name>HPXMLtoOpenStudio</class_name>
   <display_name>HPXML to OpenStudio Translator</display_name>
@@ -327,7 +327,7 @@
       <filename>defaults.rb</filename>
       <filetype>rb</filetype>
       <usage_type>resource</usage_type>
-      <checksum>CB2C2F2D</checksum>
+      <checksum>DF31D5DC</checksum>
     </file>
     <file>
       <filename>electric_panel.rb</filename>

diff --git a/HPXMLtoOpenStudio/resources/defaults.rb b/HPXMLtoOpenStudio/resources/defaults.rb
@@ -5917,14 +5917,22 @@ def self.get_panel_load_power_breaker_spaces_values(hpxml_bldg, panel_load)
             if distribution_system.distribution_system_type == HPXML::HVACDistributionTypeAir
               watts += get_240v_air_handler_load_from_capacity(UnitConversions.convert(heating_system.heating_capacity, 'btu/hr', 'kbtu/hr'))
             elsif distribution_system.distribution_system_type == HPXML::HVACDistributionTypeHydronic
-              watts += get_240v_pump_load_from_capacity(UnitConversions.convert(heating_system.heating_capacity, 'btu/hr', 'kbtu/hr'))
+
+              # FIXME: use ElectricAuxiliaryEnergy and assumptiopn from HVAC.apply_boiler
+              # watts += get_240v_pump_load_from_capacity(UnitConversions.convert(heating_system.heating_capacity, 'btu/hr', 'kbtu/hr'))
+              watts += heating_system.electric_auxiliary_energy / 2.08 # only 81 W?
+
             end
           end
           breaker_spaces += get_breaker_spaces_from_heating_capacity(heating_system.heating_capacity)
         else
           if !distribution_system.nil?
             if distribution_system.distribution_system_type == HPXML::HVACDistributionTypeAir
-              watts += get_120v_air_handler_load_from_capacity(UnitConversions.convert(heating_system.heating_capacity, 'btu/hr', 'kbtu/hr'))
+
+              # FIXME: use FanPowerWattsPerCFM and HeatingAirflowCFM
+              # watts += get_120v_air_handler_load_from_capacity(UnitConversions.convert(heating_system.heating_capacity, 'btu/hr', 'kbtu/hr'))
+              watts += heating_system.fan_watts_per_cfm * heating_system.heating_airflow_cfm
+
             elsif distribution_system.distribution_system_type == HPXML::HVACDistributionTypeHydronic
               watts += get_120v_pump_load_from_capacity(UnitConversions.convert(heating_system.heating_capacity, 'btu/hr', 'kbtu/hr'))
             end