It is proposed to build refrigeration plant for a cold storage to be maintained at –3ºC. The ambient temperature is 27ºC. If 5 × 106 kJ/h of energy is to be continuously removed from the cold storage, the minimum power required to run the refrigerator will be

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  1. 154.3 kW
  2. 75.3 kW
  3. 245.3 kW
  4. 14.3 kW

Answer (Detailed Solution Below)

Option 1 : 154.3 kW
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Concept:

Minimum power required is calculated using the COP of a Carnot refrigerator:

Then, power input is calculated by:

Calculation:

Given:

Cold storage temperature,

Ambient temperature,

Energy to be removed,

Now,

 

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