An air-standard cycle

An air-standard cycle is executed in a closed system with 0.004 kg of air and consists of the following three processes:

1-2 Isentropic compression from 100 kPa and 27°C to 1 MPa

2-3 constant heat addition in the amount of 2.76 kJ

3-1 c1c2 heat rejection to initial state (c1 and c2 are constants)

(a) Show the cycle on P-v and Tdiagrams.

(b) Calculate the heat rejected.

(c) Determine the thermal efficiency.

Assume constant specific heats at room temperature.

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