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 22°C to 600 kPa
2-3 V - constant heat addition to 1500 K
3-4 Isentropic expansion to 100 kPa
4-4 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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