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How to simulate chiller performance curve with varied COP

Hello, I would like to simulate a 2D chiller performance curve from Openstudio Simulation. But, I cannot set a COP value as varied value so I cannot simulate a curve. I tried to calculate from COP, load ratio and electricity energy to generate a curve but I found that COP values are close to reference COP value. Could anyone help me about this or if there are function that simulate chiller performance curve (kW/TR : percent chiller load) (Performance curve in resultviewer is a graph represent relationship between W/W and date. Thank you.

How to simulate chiller performance curve with varied COP

Hello, I would like to simulate a 2D chiller performance curve from Openstudio Simulation. But, I cannot set a COP value as varied value so I cannot simulate a curve. I tried to calculate from COP, load ratio and electricity energy to generate a curve but I found that COP values are close to reference COP value. Could anyone help me about this or if there are function that simulate chiller performance curve (kW/TR : percent chiller load) (Performance curve in resultviewer is a graph represent relationship between W/W and date. Thank you.