Refrigeration:Introduction, Vapor Compression Refrigeration Cycle and Vapor Absorption Refrigeration Cycle

Refrigeration may be defined as a process of removing heat from a substance and pumping it to the surroundings. It also includes the process of maintaining and reducing the temperature of a body below the general temperature of its surroundings.

Thus in a refrigerator heat is prepared from low temperature to high temperature. Theoretically, the refrigerator is a heat pump which pumps heat from a cold body and delivers it to a hot body.

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