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[EnergyPlus_Support] Re: GSHP coefficient
Aidan,
Thank you very much for your advice.
If I have the manufacturer data(flowrates, capacity and power), do you think whether it is proper to use the same coefficient just as the example file?
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "jones.aidant" <jones.aidan.t@...> wrote:
>
> From the Engineering Reference, you can describe the power and capacity with a linear relationship to and inlet temperatures and flow rates at the condenser and evaporator.
>
> You need manufacturer data for the GSHP for different conditions (flowrates and temperatures), for which corresponding power and capacity will be different. The coefficients in the equation fit model quantify what effect a change in each of these parameters has on the capacity or power.
>
> I used excel to calculate the coefficients. I installed the Analysis ToolPak Add-In (Office button > Excel Options > Add-Ins. It shows up in the 'Data' tab). The data (all the different combinations I could get) was put in excel as per the equation in the engineering reference (remembering to divide by the reference values). I did a regression with Y as Power or Capacity and the X Values were the relative Temperatures and Flowrates.
>
>
> I hope that helps
>
> Aidan
>
>
>
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "shubou" <dingwenting@> wrote:
> >
> > Hi,
> > Who can tell me how to decide the coefficient of GSHP? I read the reference but cannot find any hint.Thank you.
> >
> > HeatPump:WaterToWater:EquationFit:Heating,
> > GshpHeating, !- Name
> > GshpHeating SourceSide Inlet Node, !- Source Side Inlet Node Name
> > GshpHeating SourceSide Outlet Node, !- Source Side Outlet Node Name
> > GshpHeating LoadSide Inlet Node, !- Load Side Inlet Node Name
> > GshpHeating LoadSide Outlet Node, !- Load Side Outlet Node Name
> > 1.89E-03, !- Rated Load Side Flow Rate {m3/s}
> > 1.89E-03, !- Rated Source Side Flow Rate {m3/s}
> > 39040.92, !- Rated Heating Capacity {W}
> > 5130.00, !- Rated Heating Power Consumption {W}
> > -3.33491153, !- Heating Capacity Coefficient 1
> > -0.51451946, !- Heating Capacity Coefficient 2
> > 4.51592706, !- Heating Capacity Coefficient 3
> > 0.01797107, !- Heating Capacity Coefficient 4
> > 0.155797661, !- Heating Capacity Coefficient 5
> > -8.93121751, !- Heating Compressor Power Coefficient 1
> > 8.57035762, !- Heating Compressor Power Coefficient 2
> > 1.29660976, !- Heating Compressor Power Coefficient 3
> > -0.21629222, !- Heating Compressor Power Coefficient 4
> > 0.033862378, !- Heating Compressor Power Coefficient 5
> > 0.15; !- Cycle Time {hr}
> >
>
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