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Q5. A reversed Carnot cycle uses Ammonia as the working fluid. The Ammonia is dry saturated at the end of compression and leaves the condenser as a saturated liquid. The cycle operates between temperatures of -12ºC and 34ºC respectively.

(a) Sketch the cycle on P-h and T-s diagrams.

(b) Determine EACH of the following:

(i) The dryness fraction at the compressor inlet

(ii) The coefficient of performance

(iii) The refrigerating effect per kg of ammonia.

(c) Give TWO reasons why such a cycle would not be used in practice.