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OpenStudio-ERI v1.2.0
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@shorowit shorowit released this 30 Apr 15:37
· 2133 commits to master since this release
v1.2.0
8e9f4a1

OpenStudio-ERI version 1.2.0 has been released. Two packages are available, a minimal zip with a handful of weather files and full zip with all US TMY3 weather files.

The OpenStudio-ERI workflow calculates an Energy Rating Index (ERI) using the Department of Energy's OpenStudio/EnergyPlus building simulation platform. The open-source workflow is intended to be used by residential software tools that provide a HPXML building description file.

OpenStudio-ERI v1.2.0 uses OpenStudio v3.1.0, EnergyPlus v9.4.0, and a proposed HPXML v3.1.

Please visit the OpenStudio-ERI v1.2.0 documentation for instructions on how to get started, how to connect software tools to the workflow, etc.

New Features

  • Adds ENERGY STAR ERI Target workflow for new construction in accordance with ENERGY STAR Certification System for Homes and Apartments Using an Energy Rating Index-Based Compliance Path.
    • Optional SoftwareInfo/extension/EnergyStarCalculation/Version (values like "SF_National_3.1"; required if running ENERGY STAR calculation).
    • Breaking change: Building/Site/Address/StateCode (values like "CO" or "FL") now required.
    • Breaking change: For windows, Window/PerformanceClass (values of "residential" or "architectural") now required.
    • Breaking change: For shared boilers, HeatingSystem/HeatingCapacity, HeatingSystem/extension/SharedLoopWatts, and HeatingSystem/extension/FanCoilWatts (fan coil only) now required.
    • Breaking change: For air distribution systems with ducts, AirDistribution/NumberofReturnRegisters now required.
    • Breaking change: For shared recirculation hot water systems, HotWaterDistribution/extension/SharedRecirculation/PumpPower now required.
    • Optional extension/SharedLoopMotorEfficiency for shared boilers, chillers, cooling towers, and GSHPs w/ shared loop and extension/SharedRecirculation/MotorEfficiency for shared recirculation hot water systems.
  • Breaking change: Heating/cooling component loads no longer calculated by default for faster performance; use --add-component-loads argument if desired.
  • Allows DuctLeakageMeasurement & ConditionedFloorAreaServed to not be specified for ductless fan coil systems; Breaking change: AirDistributionType is now required for all air distribution systems.
  • Switches room air conditioner model to use Cutler performance curves.
  • Shared systems now preserved in the Rated Home (as opposed to configuring, e.g., the equivalent central AC w/ SEEReq for a chiller).
  • Removes limitation that a shared water heater serving a shared laundry room can't also serve dwelling unit fixtures (i.e., FractionDHWLoadServed is no longer required to be zero).
  • When Reference/Rated water heater fuels are determined by predominant water/space heating fuels, fossil fuel is now selected in the case of a tie.
  • Adds IDs to schematron validation errors/warnings when possible.

Bugfixes

  • Prevents a solar hot water system w/ SolarFraction=1.
  • Fixes room air conditioner performance curve.
  • Fixes heating load fractions for boiler w/ WLHP.
  • Water loop heat pumps no longer get added electric backup heating in the Rated Home.
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