Answer
A reverse Carnot cycle has highest possible COP of a refrigeration cycle or it is a ideal refrigeration cycle. hence we study reverse Carnot cycle to compare COP of the other realistic refrigeration cycle with it.
Work Step by Step
A reverse Carnot cycle has highest possible COP of a refrigeration cycle or it is a ideal refrigeration cycle. hence we study reverse Carnot cycle to compare COP of the other realistic refrigeration cycle with it.