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Q17. A vapour compression refrigeration cycle uses ammonia (R717) and operates between pressures of 2.908 bar and 15.54 bar. The refrigerant enters the compressor as dry saturated vapour and is compressed with an isentropic efficiency of 80%. The temperature at outlet from the condenser is 36°C.

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

(b) Determine EACH of the following:

(i) The temperature leaving the compressor

(ii) The coefficient of performance of the cycle.