A refrigeration machine using R-12 as refrigerant operates between pressures 2.5 bar and 9 bar. The vapour entering the compressor is dry saturated and there is no subcooling in the condenser. If the

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sumitvalse • 250

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condenser. If the capacity of the plant is 20 TR and the relative COP is 65 %.

Determine:

Actual COP 2. Actual power input to the compressor.

Properties of the refrigerant are given below enter image description here

Take sp. heat of refrigerant vapour as 0.67 KJ/Kg-K

Mumbai University > Mechanical Engineering > Sem 8 > Refrigeration and air conditioning

Marks: 10M

Year: May 2016

refrigeration and air conditioning

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