Hi all. i would like to get some info from you guys, regarding on these 2 refrigerant. Recently my company asked me to find the COP for these 2 refrigerants. HC-22a will be a drop-in replacement for R-22a as the supplier proposed to the company. How do i calculate COP for the chiller based on these 2 refrigerant? Please help as i'm really new to this refrigeration system..