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Mechanical Engineering · Q181

Refrigeration And Air Conditioning

Engineering and GATE · Mechanical Engineering · question 181

Q181

A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

A.
1 kW
B.
2 kW
C.
3 kW
D.
4 kW
Answer

Answer: Option D

Solution

Answer: Option D
Solution:
C.O.P. (heat pump) = 1 + C.O.P. (R effect)     [R = Refrigeration]
5 = 1 + C.O.P. (R effect)
C.O.P. (R effect) = 5 - 1.
C.O.P. (R effect) = 4.