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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The C.O.P. of a heat pump working on a reversed Carnot cycle is

T₂/(T₂ - T₁)
(T₁ - T₂)/T₁
(T₂ - T₁)/T₁
T₁/(T₂ - T₁)

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Refrigeration and Air Conditioning
On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process

Takes place at constant temperature
Involves no change in volume
Takes place at constant entropy
Takes place at constant pressure

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Refrigeration and Air Conditioning
The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents

Compression of the refrigerant vapour
Condensation of the refrigerant vapour
Metering of the refrigerant liquid
Evaporation of the refrigerant liquid

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Refrigeration and Air Conditioning
The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.

Lower
Same
None of these
Higher

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Refrigeration and Air Conditioning
Air refrigerator works on

Both (A) and (B)
Bell Coleman cycle
Reversed Carnot cycle
None of these

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Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Requires little power consumption
Gives noisy operation
Cools below 0°C
Gives quiet operation

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