Hello,

I am a novice in refrigeration. It is something I have studied quite less, only the most basic of starting concepts. My course doesn't go into deep until late this year. But I am currently doing my summer industrial training and my project includes calculating the COP of the chiller unit functional there.

My basic doubt is that which of the following two approaches should I adopt to find the COP-

1. I know the discharge and suction pressures. So should I make a p-h graph for these pressures and write the steady state flow equations and calculate Q/W?

OR

2. Should I measure the heat removed from water through specifications of the PHE package and also measure the work input of compressors in KW and divide the two quantities?

I request you all to PLEASE help me out, I will be very grateful. And forgive me any stupid questions I might have unknowingly asked or would ask.