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Q8. In a single acting, single stage reciprocating air compressor, the conditions at the beginning of compression are 0.95 bar and 12℃. When the delivery valve opens the cylinder, conditions are 7.6 bar and 157℃. The diameter of the cylinder bore is 200 mm and the compressor stroke are 300 mm. The clearance volume is 5 % of the swept volume and the compressor runs at a speed of 360 rev/min.

(a) Sketch the cycle on a pressure- Volume diagram. (2)

(b) Calculate EACH of the following.

(i) The index of compression; (3)

(ii) The volumetric efficiency; (2)

(iii) The compressor indicated power; (5)

(vii) The compressor isothermal efficiency. (4)