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A refrigerating system operates on a reversed Carnot cycle. The higher temperature of the refrigerant in the system is 35°C and the lower temperature is -15°C. The COP of the system will be: 


1. 0.19
2. 5.16
3. 1.93
4. 0.51

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Best answer
Correct Answer - Option 2 : 5.16

Concept:

Refrigerator:

COP of a reversed Carnot cycle

\(COP = \frac{{{T_L}}}{{{T_H} - {T_L}}} \)

where, TL = Lower Temperature, TH = Higher temperature

Calculation:

Given:

TH = 273 + 35°C = 308 K

TL = 273 + (-15°C) = 258 K

\(COP = \frac{{{T_L}}}{{{T_H} - {T_L}}} = \frac{{258}}{{308 - 258}} = 5.16\)

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