The Carnot Refrigeration Cycle:

The Carnot Refrigeration Cycle:

It is the most efficient cycle and valid for gases as wall a vapors i.e. It can also be realized in wet
region of the p-h or T-S diagram. These cycles approach external reversibility as T → 0. i.e
heat transfer with environment takes place with minimum possible temperature difference.
(Refer to the figure T-S diagram)
Source of irreversible losses (loss of efficiency)
· P in suction and discharge valves
· Re-expansion of gas in clearance volume
· Leakages past rings
· Leakages through discharge and suction valves
· Cylinder heating of the suction gas