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Define : i) Tonnage of refrigeration........

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Question: 

Define :
i) Tonnage of refrigeration ii) Coefficient of performance.

Answer: 

i) Tonnage of Refrigeration – is defined as the amount of refrigeration effect produced by uniform melting of one ton (1000Kg) of ice from and at 00 in 24 hours. .

ii) Coefficient of performance- is the ratio of heat extracted in refrigerator to work done on the refrigerant