Determine the chemical formulate for refrigerant, Mechanical Engineering

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(a) Draw P-H and T-S diagrams for following cases : (3)

(i) Cycle with superheated vapour before compression.

(ii) Cycle with sub-cooling or under-cooling of refrigerant.

(b) What are the required properties of refrigerants ? Determine the chemical formulate for Refrigerant R-113 ?


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