IRmechEman
Mechanical
- Sep 17, 2013
- 1
For a given ideal refrigeration cycle with an evaporator temperature of -20 deg C and condenser temperature of 40 deg C, what is responsible for the COP differences between R-12, R-22, and R-410A? After setting it up in EES, I get COPs of 3.174, 3.149, and 2.915, respectively. I am trying to understand what it is about the thermophysical properties of R-12 that make it a better choice (efficiency-wise) than the other two in this particular cycle. This question is purely theoretical.