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A refrigeration system has air leaving refrigerated space at 7oC and 1 bar and subsequently air...

A refrigeration system has air leaving refrigerated space at 7oC and 1 bar and subsequently air is compressed isentropically to 5 bar. After being compressed air is cooled up to 27oC at this pressure and then expanded isentropically up to 1bar and discharged into refrigerated space. Determine (a) the highest specific enthalpy, (b) the COP of the system.

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