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Energyplus Calculation - Chiller Performance Curves

Hello!

I'am dealing with chiller performance curves. And so once upon a time I had find the following informations about the calaculation in energyplus:

(1) FullLoadCoolingCapacity = ChillerCapFTemp * Reference Capacity

(2) FullLoadEIR = ChillerEIRFTemp * (1/Reference COP)

(3) PartLoadEIR = ChillerEIRFPLR * (1/Reference COP) * ChillerEIRFTemp

I' dont know wherefrom I got the informations. In the documentation i do not found this informations. Is there anybody who can confirm the calculation and have a soruce for the calculations?

Best regards, Alex