Refrigeration and Air Conditioning
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Decrease
Remain unaffected
Increase
May increase or decrease depending on the type of refrigerant used

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Refrigeration and Air Conditioning
One ton of the refrigeration is

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

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