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Chiller minimum load ratio is set in the IDF however does not appear in eplustbl.htm #10888

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antonpsd opened this issue Jan 3, 2025 · 2 comments
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Defect Includes code to repair a defect in EnergyPlus

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@antonpsd
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antonpsd commented Jan 3, 2025

Issue overview

Chiller minimum load ratio is set in the IDF however does not appear in eplustbl.htm, please see the screenshots below.

Details

  • Platform - Windows operating system
  • Version of EnergyPlus: 24.2

image

image

image

The .idf and eplusbt.tm are attached in a zip file

files.zip

@antonpsd antonpsd changed the title minimum load ratio is set in the IDF, does not appear in eplustbl.htm Chiller minimum load ratio is set in the IDF however does not appear in eplustbl.htm Jan 3, 2025
@jmarrec
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jmarrec commented Jan 23, 2025

Can confirm with ElectricEIRChiller.idf example file.

@jmarrec jmarrec added the Defect Includes code to repair a defect in EnergyPlus label Jan 23, 2025
@jmarrec
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jmarrec commented Jan 23, 2025

Chiller:Electric:ReformulatedEIR seem to report the Minimum Value of y for the Curve that's set on "Electric Input to Cooling Output Ratio Function of Part Load Ratio Curve Name"

  Chiller:Electric:ReformulatedEIR,
    ReformEIRChiller Trane CGWD 207kW/3.99COP/None,  !- Name
    25000.0,                 !- Reference Capacity {W}
    3.99,                    !- Reference COP {W/W}
    8.89,                    !- Reference Leaving Chilled Water Temperature {C}
    34.60,                   !- Reference Leaving Condenser Water Temperature {C}
    0.001075,                !- Reference Chilled Water Flow Rate {m3/s}
    0.001345,                !- Reference Condenser Water Flow Rate {m3/s}
    ReformEIRChiller Trane CGWD 207kW/None CAPFT,  !- Cooling Capacity Function of Temperature Curve Name
    ReformEIRChiller Trane CGWD 207kW/None EIRFT,  !- Electric Input to Cooling Output Ratio Function of Temperature Curve Name
    ,                        !- Electric Input to Cooling Output Ratio Function of Part Load Ratio Curve Type
    ReformEIRChiller Trane CGWD 207kW/None EIRFPLR,  !- Electric Input to Cooling Output Ratio Function of Part Load Ratio Curve Name
-   0.25,                    !- Minimum Part Load Ratio        < ------- THIS IS NOT REPORTED
    1.01,                    !- Maximum Part Load Ratio
    1.0,                     !- Optimum Part Load Ratio
    0.25,                    !- Minimum Unloading Ratio
    Big Chiller Inlet Node,  !- Chilled Water Inlet Node Name
    Big Chiller Outlet Node, !- Chilled Water Outlet Node Name
    Big Chiller Condenser Inlet Node,  !- Condenser Inlet Node Name
    Big Chiller Condenser Outlet Node,  !- Condenser Outlet Node Name
    1.0,                     !- Fraction of Compressor Electric Consumption Rejected by Condenser
    2.0,                     !- Leaving Chilled Water Lower Temperature Limit {C}
    NotModulated,            !- Chiller Flow Mode Type
    0.0;                     !- Design Heat Recovery Water Flow Rate {m3/s}

  Curve:Bicubic,
    ReformEIRChiller Trane CGWD 207kW/None EIRFPLR,  !- Name
    7.086284E-02,            !- Coefficient1 Constant
    2.787561E-03,            !- Coefficient2 x
    -8.917038E-06,           !- Coefficient3 x**2
    2.309734E-01,            !- Coefficient4 y
    1.250442E+00,            !- Coefficient5 y**2
    -2.161029E-03,           !- Coefficient6 x*y
    0.000000E+00,            !- Coefficient7 x**3
    -5.630094E-01,           !- Coefficient8 y**3
    0.000000E+00,            !- Coefficient9 x**2*y
    0.000000E+00,            !- Coefficient10 x*y**2
    20.33,                   !- Minimum Value of x
    36.00,                   !- Maximum Value of x
+   0.00,                    !- Minimum Value of y    < ------------------- THIS IS WHAT'S REPORTED
    1.01;                    !- Maximum Value of y

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