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OpenStudio-ERI v1.3.0
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@shorowit shorowit released this 12 Nov 19:07
· 1913 commits to master since this release
v1.3.0
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OpenStudio-ERI version 1.3.0 has been released. 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.

Two packages are available, a minimal zip with a handful of weather files and full zip with all US TMY3 weather files. OpenStudio-ERI v1.3.0 uses OpenStudio v3.3.0, EnergyPlus v9.6.0, and a proposed HPXML v4.0. Please visit the OpenStudio-ERI v1.3.0 documentation for instructions on how to get started, how to connect software tools to the workflow, etc.

New Features

  • Updates to OpenStudio 3.3.0/EnergyPlus 9.6.0.
  • Breaking change: HVAC grading inputs FanPowerNotTested, AirflowNotTested, and ChargeNotTested are no longer accepted.
  • Breaking change: Replaces "Unmet Load" outputs with "Unmet Hours".
  • Breaking change: Renames "Load: Heating" and "Peak Load: Heating" (and Cooling) outputs to include "Delivered".
  • Breaking change: Any heat pump backup heating requires HeatPump/BackupType="integrated" to be specified.
  • Breaking change: HPXML schema version must now be '4.0' (proposed).
    • Moves FoundationWall/Insulation/Layer/extension/DistanceToTopOfInsulation to FoundationWall/Insulation/Layer/DistanceToTopOfInsulation.
    • Moves FoundationWall/Insulation/Layer/extension/DistanceToBottomOfInsulation to FoundationWall/Insulation/Layer/DistanceToBottomOfInsulation.
    • Moves Slab/PerimeterInsulationDepth to Slab/PerimeterInsulation/Layer/InsulationDepth.
    • Moves Slab/UnderSlabInsulationWidth to Slab/UnderSlabInsulation/Layer/InsulationWidth.
    • Moves Slab/UnderSlabInsulationSpansEntireSlab to Slab/UnderSlabInsulation/Layer/InsulationSpansEntireSlab.
  • Allows modeling PTAC and PTHP HVAC systems.
  • Allows additional fuel types for generators.
  • Allows non-zero refrigerant charge defect ratios for ground source heat pumps.
  • Allows CEER (Combined Energy Efficiency Ratio) efficiency unit for room AC.
  • Allows specifying the foundation wall type (e.g., solid concrete, concrete block, wood, etc.).
  • Removes error-check for number of bedrooms based on conditioned floor area, per RESNET guidance.
  • Introduces a small amount of infiltration for unvented spaces.
  • ConditionedBuildingVolume input is no longer needed (and removes error-check for InfiltrationVolume relative to it).
  • Improves consistency of installation quality calculations for two/variable-speed air source heat pumps and ground source heat pumps.

Bugfixes

  • Improves ground reflectance for window interior shading.
  • Improves HVAC fan power for central forced air systems.
  • Fixes mechanical ventilation compartmentalization area calculation for SFA/MF homes with surfaces with InteriorAdjacentTo==ExteriorAdjacentTo.
  • Negative DistanceToTopOfInsulation values are now disallowed.
  • Fixes workflow errors if a VentilationFan has zero airflow rate or zero hours of operation.
  • Fixes heating/cooling seasons (used for e.g. summer vs winter window shading) for the southern hemisphere.
  • Relaxes Overhangs DistanceToBottomOfWindow vs DistanceToBottomOfWindow validation when Depth is zero.
  • Fixes possibility of "Construction R-value ... does not match Assembly R-value" error.
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