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Q6. A reverse heat engine operates on the reverse Carnot cycle. The working fluid is R134a and the cycle operates between the temperature limits of -5℃ and + 40℃.

(a) Sketch the cycle on a Temperature-specific entropy diagram indicating the network. (4)

(b) Calculate EACH of the following: -

(i) The dryness fraction at the beginning of the compression; (3)

(ii) The heat removed per kg of fluid from the low temperature reservoir; (3)

(iii) The heat rejected per kg of fluid to the high temperature reservoir; (2)

(iv) The cycle network input; (2)

(vi) The cycle coefficient of performance. (2)