[EnergyPlus_Support] Re: Calculating Water-to-Air Heat Pump Curve-fitting Coefficients

["ooikoonbeng2004" <kooi@xxxxxxxxxxxxxxxx>]

i am in a similar dilema. i am trying to use the Performance Curves 
but do not know what the x (and for bi-.. also the y) stands for. ooi
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "energyplus99" 
<energyplus99@...> wrote:
>
> I'm trying to generate curve-fitting coefficients for:
> 
> COIL:WATERTOAIRHP:EquationFit:COOLING and 
> COIL:WATERTOAIRHP:EquationFit:HEATING 
> 
> objects.  The EP InputOutputReference alludes to using a 
generalized 
> least-squares method and Tang, in Appendix B of his paper 
(Modeling 
> Packaged Heat Pumps In a Quasi-steady State Energy Simulation 
Program) 
> references an Excel spreadsheet for calculating these.  But there 
are 
> no specifics on exactly how to do this.
> 
> Does anyone know how I can get a copy of this spreadsheet or how I 
can 
> generate these coefficients using the current version of 
EnergyPlus?  
> Is it possible that the coefficients published in the EP examples 
(for 
> example, HeatPumpWaterToAirEquationFit.idf) are universal enough 
to be 
> applicable to a wide variety of heat pump brands (with possibly 
only 
> adjustments to rated flowrates, capacities and power consumption 
> necessary)?  Any thoughts would be much appreciated!
>




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