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A refrigerator operates on Reversed Carnot cycle. What is the power required to drive the refrigerator between temperatures of 42°C and 4°C, if heat at the rate of 2 kJ/s is extracted from the low-temperature region?

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  1. 0.174 kW
  2. 0.374 kW
  3. 0.274 kW
  4. 0.474 kW

Answer (Detailed Solution Below)

Option 3 : 0.274 kW
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Detailed Solution

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Concept:

COP of Refrigerator:

For Reversible Refrigerator:

Calculation:

Given:

T1 = 42°C ⇒ 315 K, and T2 = 4°C ⇒ 277 K, Q2 = 2 kJ/sec = 2 kW.

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Q1.The following Temperature – Entropy diagram represents a Refrigeration system operates on the reversed Carnot cycle. The higher temperature of the refrigerant in the system is 35°C and the lower temperature is -15°C. What will be the C.O.P?
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Q1.The Bell-Coleman cycle is also known as:
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