Hello Everyone,
I am a colllege student and I am currently enrolled in a class dealing with Refrigeration engineering.I am attempting a homework problem but I am having a rather difficult time with it. It deals with Subcooling of refrigerant R134A and states for R134a analyze the effect of subcooling from 0 to 10 Deg F and plot the refrigeration effect and COP as a function of sub degrees of cooling. I have no clue on this one. I am trying to plot my points on my PH Diagram but i cant get my points to calculate COP or refrigeration effect. How do I solve this?

I know COP in this case would be=(h2-h1')/(h3-h2)

I am also going to try to use EES for this problem. Anyone ever use it? I am in need of help, i dont understand.