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Hello,

I autosize Low Speed Gross Rated Total Cooling Capacity and High Speed Gross Rated Total Cooling Capacity for two stage DX cooling coil. Low Speed Gross Rated Total Cooling Capacity is 1/3 of High Speed Gross Rated Total Cooling Capacity. Is there any way I can change this ratio such as 35% in EnergyPlus?

Thanks,

Eric

Coil:Cooling:DX:TwoSpeed, BaseSys13 CoilClg, !- Name Always On, !- Availability Schedule Name autosize, !- High Speed Gross Rated Total Cooling Capacity autosize, !- High Speed Rated Sensible Heat Ratio 3.9094111254, !- High Speed Gross Rated Cooling COP autosize, !- High Speed Rated Air Flow Rate , !- Unit Internal Static Air Pressure BaseSys13 OACtrl OA System Mixed Air Node, !- Air Inlet Node Name BaseSys13 CoilClg Outlet Node, !- Air Outlet Node Name CoilClgDXQRatio_fTwbToadbSI, !- Total Cooling Capacity Function of Temperature Curve Name CoilClgDXDblQRatio_fCFMRatio, !- Total Cooling Capacity Function of Flow Fraction Curve Name CoilClgDXEIRRatio_fTwbToadbSI, !- Energy Input Ratio Function of Temperature Curve Name CoilClgDXDblEIRRatio_fCFMRatio, !- Energy Input Ratio Function of Flow Fraction Curve Name CoilClgDXEIRRatio_fQFrac, !- Part Load Fraction Correlation Curve Name autosize, !- Low Speed Gross Rated Total Cooling Capacity autosize, !- Low Speed Gross Rated Sensible Heat Ratio 3.9094111254, !- Low Speed Gross Rated Cooling COP autosize, !- Low Speed Rated Air Flow Rate CoilClgDXQRatio_fTwbToadbSI 1, !- Low Speed Total Cooling Capacity Function of Temperature Curve Name CoilClgDXEIRRatio_fTwbToadbSI 1, !- Low Speed Energy Input Ratio Function of Temperature Curve Name , !- Condenser Air Inlet Node Name AirCooled, !- Condenser Type , !- Minimum Outdoor DryBulb Temperature for Compressor Operation 0.0, !- High Speed Evaporative Condenser Effectiveness autosize, !- High Speed Evaporative Condenser Air Flow Rate autosize, !- High Speed Evaporative Condenser Pump Rated Power Consumption 0.0, !- Low Speed Evaporative Condenser Effectiveness autosize, !- Low Speed Evaporative Condenser Air Flow Rate autosize, !- Low Speed Evaporative Condenser Pump Rated Power Consumption , !- Supply Water Storage Tank Name , !- Condensate Collection Water Storage Tank Name 0.0, !- Basin Heater Capacity 10.0; !- Basin Heater Setpoint Temperature

Hello,

I autosize Low Speed Gross Rated Total Cooling Capacity and High Speed Gross Rated Total Cooling Capacity for two stage DX cooling coil. Low Speed Gross Rated Total Cooling Capacity is 1/3 of High Speed Gross Rated Total Cooling Capacity. Is there any way I can change this ratio such as 35% in EnergyPlus?

Thanks,

Eric

Coil:Cooling:DX:TwoSpeed, BaseSys13 CoilClg, !- Name Always On, !- Availability Schedule Name autosize, !- High Speed Gross Rated Total Cooling Capacity autosize, !- High Speed Rated Sensible Heat Ratio 3.9094111254, !- High Speed Gross Rated Cooling COP autosize, !- High Speed Rated Air Flow Rate , !- Unit Internal Static Air Pressure BaseSys13 OACtrl OA System Mixed Air Node, !- Air Inlet Node Name BaseSys13 CoilClg Outlet Node, !- Air Outlet Node Name CoilClgDXQRatio_fTwbToadbSI, !- Total Cooling Capacity Function of Temperature Curve Name CoilClgDXDblQRatio_fCFMRatio, !- Total Cooling Capacity Function of Flow Fraction Curve Name CoilClgDXEIRRatio_fTwbToadbSI, !- Energy Input Ratio Function of Temperature Curve Name CoilClgDXDblEIRRatio_fCFMRatio, !- Energy Input Ratio Function of Flow Fraction Curve Name CoilClgDXEIRRatio_fQFrac, !- Part Load Fraction Correlation Curve Name autosize, !- Low Speed Gross Rated Total Cooling Capacity autosize, !- Low Speed Gross Rated Sensible Heat Ratio 3.9094111254, !- Low Speed Gross Rated Cooling COP autosize, !- Low Speed Rated Air Flow Rate CoilClgDXQRatio_fTwbToadbSI 1, !- Low Speed Total Cooling Capacity Function of Temperature Curve Name CoilClgDXEIRRatio_fTwbToadbSI 1, !- Low Speed Energy Input Ratio Function of Temperature Curve Name , !- Condenser Air Inlet Node Name AirCooled, !- Condenser Type , !- Minimum Outdoor DryBulb Temperature for Compressor Operation 0.0, !- High Speed Evaporative Condenser Effectiveness autosize, !- High Speed Evaporative Condenser Air Flow Rate autosize, !- High Speed Evaporative Condenser Pump Rated Power Consumption 0.0, !- Low Speed Evaporative Condenser Effectiveness autosize, !- Low Speed Evaporative Condenser Air Flow Rate autosize, !- Low Speed Evaporative Condenser Pump Rated Power Consumption , !- Supply Water Storage Tank Name , !- Condensate Collection Water Storage Tank Name 0.0, !- Basin Heater Capacity 10.0; !- Basin Heater Setpoint Temperature

Hello,

I autosize Low Speed Gross Rated Total Cooling Capacity and High Speed Gross Rated Total Cooling Capacity for two stage DX cooling coil. Low Speed Gross Rated Total Cooling Capacity is 1/3 of High Speed Gross Rated Total Cooling Capacity. Is there any way I can change this ratio such as 35% in EnergyPlus?

Thanks,

Eric

Coil:Cooling:DX:TwoSpeed,
BaseSys13 CoilClg,        !- Name
    Always On,                !- Availability Schedule Name
    autosize,                 !- High Speed Gross Rated Total Cooling Capacity
    autosize,                 !- High Speed Rated Sensible Heat Ratio
    3.9094111254,             !- High Speed Gross Rated Cooling COP
    autosize,                 !- High Speed Rated Air Flow Rate
    ,                         !- Unit Internal Static Air Pressure
    BaseSys13 OACtrl OA System Mixed Air Node,    !- Air Inlet Node Name
    BaseSys13 CoilClg Outlet Node,    !- Air Outlet Node Name
    CoilClgDXQRatio_fTwbToadbSI,    !- Total Cooling Capacity Function of Temperature Curve Name
    CoilClgDXDblQRatio_fCFMRatio,    !- Total Cooling Capacity Function of Flow Fraction Curve Name
    CoilClgDXEIRRatio_fTwbToadbSI,    !- Energy Input Ratio Function of Temperature Curve Name
    CoilClgDXDblEIRRatio_fCFMRatio,    !- Energy Input Ratio Function of Flow Fraction Curve Name
    CoilClgDXEIRRatio_fQFrac,    !- Part Load Fraction Correlation Curve Name
    autosize,                 !- Low Speed Gross Rated Total Cooling Capacity
    autosize,                 !- Low Speed Gross Rated Sensible Heat Ratio
    3.9094111254,             !- Low Speed Gross Rated Cooling COP
    autosize,                 !- Low Speed Rated Air Flow Rate
    CoilClgDXQRatio_fTwbToadbSI 1,    !- Low Speed Total Cooling Capacity Function of Temperature Curve Name
    CoilClgDXEIRRatio_fTwbToadbSI 1,    !- Low Speed Energy Input Ratio Function of Temperature Curve Name
    ,                         !- Condenser Air Inlet Node Name
    AirCooled,                !- Condenser Type
    ,                         !- Minimum Outdoor DryBulb Temperature for Compressor Operation
    0.0,                      !- High Speed Evaporative Condenser Effectiveness
    autosize,                 !- High Speed Evaporative Condenser Air Flow Rate
    autosize,                 !- High Speed Evaporative Condenser Pump Rated Power Consumption
    0.0,                      !- Low Speed Evaporative Condenser Effectiveness
    autosize,                 !- Low Speed Evaporative Condenser Air Flow Rate
    autosize,                 !- Low Speed Evaporative Condenser Pump Rated Power Consumption
    ,                         !- Supply Water Storage Tank Name
    ,                         !- Condensate Collection Water Storage Tank Name
    0.0,                      !- Basin Heater Capacity
    10.0;                     !- Basin Heater Setpoint Temperature
Temperature