Carnot Refrigeration Cycle:

In refrigeration system, the Carnot cycle considered is reversed Carnot cycle. We know that a heat engine functioning on Carnot engine contain the highest efficiency. Likewise, a refrigeration system functioning on the reversed cycle, contain the highest coefficient of performance.

                                                   (a) p-v Diagram                                                  (b) T-s Diagram

                                                      Reversed Carnot Cycle

A reversed Carnot cycle, by using air as the working medium is indicated on p-v & T-s diagrams in above given fig (a) & (b) respectively. At point 1, let p₁, v₁, T₁ be the pressure, particular volume & temperature of air respectively.