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Why COP Of re...

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Why COP Of refrigerator is greater than 1?

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Q. Assertion :The heat rejected to the hot sink is greater than the heat absorbed from the cold source, so the heating COP is one greater than the cooling COP. Reason: CoP of a heat engine can be increased by decreasing its work input.

Q. If a reversed Carnot cycle operates between the temperature limits of

27^{\circ} C a n d - 3^{\circ} C

, then the ratio of the COP of a refrigerator to that of a heat pump (COP of refrigerator/COP of heat pump) based on the cycle is (round off to 2 decimal places).

For an ideal refrigeration cycle COP is =

Q. Assertion :The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work required. Reason: Higher COPs equate to lower operating costs.

Q. For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be:

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