9-14 An air-standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes: 1-2 Isentropic compression from 100 kPa and 27°C to 800 kPa 2-3 v constant heat addition to 1800 K 3-4 Isentropic expansion to 100 kPa 4-1 P constant heat rejection to initial state a) Show the cycle on P-v and T-s diagrams. b) Calculate the net work output per unit mass. c) Determine the thermal efficiency. | |
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