Refrigeration and Air Conditioning
The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called

Refrigerating efficiency
Coefficient of performance of refrigeration
Coefficient of performance of heat pump
Relative coefficient of performance

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Refrigeration and Air Conditioning
One ton of the refrigeration is

The cooling effect produced by melting 1 ton of ice
The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours
The refrigeration effect to produce 1 ton of ice at NTP conditions
The standard unit used in refrigeration problems

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