An air-standard cycle is executed within a closed piston– cylinder system and consists of...

An air-standard cycle is executed within a closed piston– cylinder system and consists of three processes as follows:

Assume air has constant properties with c_v = 0.718 kJ/kg·K, c_p = 1.005 kJ/kg·K, R = 0.287 kJ/kg·K, and k = 1.4.

(a) Sketch the P-v and T-s diagrams for the cycle.

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(b) Determine the ratio of the compression work to the expansion work (the back work ratio).

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(c) Determine the cycle thermal efficiency.