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A heat pump working on a reversed Carnot cycle has a COP of 5. If it works as a refrigerator taking 1 kW of work input, the refrigeration effect will be
  • a)
    1 Kw
  • b)
    2 Kw
  • c)
    3 Kw
  • d)
    4 Kw
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A heat pump working on a reversed Carnot cycle has a COP of 5. If it w...
In a refrigerator, COP = Referigeration Effect /work input_________(i)

(C.O.P) of heat pump - (C.O.P) of refrigerator = 1. 
5 = 1 + (COP)Refrigeration.
SO, (COP) Refrigeration = 4.

From equation (i) we get;
Refrigeration effect = 4 *1 KW = 4 KW.

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Most Upvoted Answer
A heat pump working on a reversed Carnot cycle has a COP of 5. If it w...
Given: COP = 5, Work input = 1 kW

To find: Refrigeration effect

Formula used: COP = QL/W, where QL is the refrigeration effect

Calculation:

Using the formula COP = QL/W

5 = QL/1 kW

QL = 5 kW

Therefore, the refrigeration effect will be 4 kW (as only 1 kW of work input is used)

Answer: Option D (4 kW)
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Community Answer
A heat pump working on a reversed Carnot cycle has a COP of 5. If it w...
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