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Q15. A vapour compression refrigerator uses R134a and operates between pressures of 1.3272 bar and 10.163 bar. The refrigerant enters the compressor at a temperature of -15°C with specific volume 0.15097 m³/kg and the isentropic efficiency of the compressor is 88%. The temperature at outlet from the condenser is 35°C. The cooling load is 50 kW and the volumetric efficiency of the compressor is 0.86.

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

(b) Determine EACH of the following:

(i) The coefficient of performance of the cycle;

(ii) The compressor swept volume rate.