Refrigerator:
A Refrigerator is a device which operating in a cyclic process to maintains  the temperature of a cold body (refrigerated space) at a temperature lower  than the temperature of surrounding.

Basic Components of a Refrigerator:
- Condenser
 - Expansion Valve
 - Evaporator
 - Compressor
 

The performance of a Air conditioner or Refrigerator is judged by how much heat transfer Qc occurs into the warm space compared with how much work input W is required.
 
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