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A refrigerator with a cooling capacity of 5 ton uses ammonia as the working fluid. The...

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Mechanical Engineering

A refrigerator with a cooling capacity of 5 ton uses ammonia asthe working fluid. The condenser and evaporator maintain a pressureof 1500 kPa and 200 kPa respectively. The compressor has anisentropic efficiency of 80%. If the vapor leaving the evaporatoris superheated by 5°C and the liquid leaving the condenser issupercooled by 5°C, determine:
a) The power input to the compressor

b) The mass flow rate of ammonia

c) The COP of the refrigerator

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