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[EnergyPlus_Support] DX coils consistency with ASHRAE 9.1-2007 Tab6.8.1A for a Baseline VAV system 5 with reheat





Dear all,

I have a question about how to model correctly a VAV system 5 of a baseline model in a LEED project.
My question is about how to set the DX cooling coil COP in the object Coil:Cooling:DX:SingleSpeed.

The object is set in this form.

Coil:Cooling:DX:SingleSpeed,
    VAV-PC-01B AHU 4 Unitary Cooling Coil DX Cooling Coil,  !- Name
    On 24/7,                 !- Availability Schedule Name
    autosize,                !- Gross Rated Total Cooling Capacity {W}
    autosize,                !- Gross Rated Sensible Heat Ratio
    2.87,                    !- Gross Rated Cooling COP {W/W}
    autosize,                !- Rated Air Flow Rate {m3/s}
    773.300000,              !- Rated Evaporator Fan Power Per Volume Flow Rate {W/(m3/s)}
    VAV-PC-01B AHU 4 Mixed Air Outlet,  !- Air Inlet Node Name
    VAV-PC-01B AHU 4 Unitary Cooling Coil DX Cooling Coil Air Outlet Node,  !- Air Outlet Node Name
    DXClgCoilTotalClgCapFuncTemperature,  !- Total Cooling Capacity Function of Temperature Curve Name
    DXClgCoilTotalClgCapFuncFlowFraction,  !- Total Cooling Capacity Function of Flow Fraction Curve Name
    DXClgCoilEnergyInputRatioFuncTemperature,  !- Energy Input Ratio Function of Temperature Curve Name
    DXClgCoilEnergyInputRatioFuncFlowFraction,  !- Energy Input Ratio Function of Flow Fraction Curve Name
    DXCoilPartLoadFractionCorrelation,  !- Part Load Fraction Correlation Curve Name
    0.0,                     !- Nominal Time for Condensate Removal to Begin {s}
    0.0,                     !- Ratio of Initial Moisture Evaporation Rate and Steady State Latent Capacity {dimensionless}
    0.0,                     !- Maximum Cycling Rate {cycles/hr}
    0.0,                     !- Latent Capacity Time Constant {s}
    ,       &n

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Posted by: telemar87@xxxxxxxxx


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