Electric panel

[joseph-robertson]

Pull Request Description

Support electric panel.

Related to: hpxmlwg/hpxml#420 and hpxmlwg/hpxml#435.

Checklist:

• Rename Watts under PanelLoad to something else; Power? Capacity? Decided on PowerRating.
• Move all system-prefixed arguments to panel-prefixed, so new electric_panel_xxx arguments section maps more directly to ElectricPanels HPXML section
• Make "Mech Vent" its own panel load type for ventilation fans (i.e., any load that can reference a system ID has its own load type)
• Create catchall argument for covering "Other" loads like garage door opener, garbage disposal, microwave (i.e., anything that doesn't reference a system ID)
• Separate arguments for controlling 83 and 87 outputs?
  • We may not want 87 for resstock -- can't we just ignore them?
• Comments/suggestions from Scott:
  • Meter-based total can change based on use of stochastic schedules and/or timestep.
  • Move HPXML class input capacity methods to HVAC resource file so they are only used for panel loads (and we can ignore fuel systems)
  • Separate results_panel.csv (unit reporting?) which is output from translator measure and then overwritten (with Meter-based) from reporting measure. See results_design_load_details.csv as an example.
  • Start discussion on adopting new extension elements: Subpanels, circuits, breakers/slots, smart features, etc on ElectricPanel hpxmlwg/hpxml#422 (comment)
  • Electric panel should be opt-in using new build measure argument for panel scenario types.
• Handle the new backup_heating_capacity input for HPWH; assume no simultaneous operation and so take max(heating_capacity, backup_heating_capacity)? Can the 120V HPWH have backup?
• Pool and permanent spa
  • There is no pump type arguments -- build measure defaults to Unknown; add new arguments? Update: we default based on a 2 HP pump capacity.
• Default watts based on input capacity and not output capacity
  • Divide output capacity by seasonal COP (e.g., SEER, HSPF) or by rated COP (e.g., additional_properties.heat_rated_cops, additional_properties.cool_rated_cops)?
  • For HeatingSystem, CoolingSystem, HeatPump: add heating_input_capacity, cooling_input_capacity, and backup_heating_input_capacity methods to hpxml.rb
  • For WaterHeatingSystem: add heating_input_capacity and backup_heating_input_capacity methods to hpxml.rb (additional_properties.cop set by Waterheater.set_heat_pump_cop)
• Get alternative/better defaults:
  • Replace regressions:
    • DX coil compressor power rating from rated capacity
      • Yingli is looking at correlation with EER2 (not strong); going back to using rated capacity as the input
      • will be updating the work plan with new equations
    • Air handler / wall furnace fan: fan_watts_per_cfm * xxx_airflow_cfm? Yes.
    • Pump: electric_auxiliary_energy / 2.08? Yes.
  • Clothes dryer
    • How to determine HP or not? Let's just use vented/ventless as the switch -- probably the best option at this point in time.
  • Mechanical ventilation:
    • Use count and fan_power? Yes.
    • Should local ventilation (i.e., kitchen and bath fans) really occupy at most 1 breaker space? Yes.

Checklist

Not all may apply:

• Schematron validator (EPvalidator.xml) has been updated
• Sample files have been added/updated (openstudio tasks.rb update_hpxmls)
• Tests have been added/updated (e.g., HPXMLtoOpenStudio/tests/test*.rb and/or workflow/tests/test*.rb)
• Documentation has been updated
• Changelog has been updated
• openstudio tasks.rb update_measures has been run
• No unexpected changes to simulation results of sample files

[joseph-robertson]

Each component can be referenced by at most one branch circuit.

[joseph-robertson]

Components, e.g. heat pump, can be referenced by more than one demand load.