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



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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