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Q5. A vapour compression refrigeration system using Ammonia (R717) operates between the pressures of 5.346 bar and 13.89 bar.

It enters the compressor dry saturated and compressed thru a compressor with an isentropic efficiency of 82%.

6 K undercooling takes place in the condenser.

(a) Draw the cycle on pressure-specific enthalpy and temperature-specific entropy diagrams. (2)

(b) Calculate EACH of the following:

(i) the temperature leaving the compressor.

(ii) the coefficient of performance.