Repeat Prob. 9–154 using constant specific heats at room temperature.

Data From Repeat Prob. 9–154 u

An air-standard cycle with variable specific heats is executed in a closed system with 0.003 kg of air, and it consists of the following three processes:

1-2 Isentropic compression from 100 kPa and 27°C to 700 kPa 2-3 P = constant heat addition to initial specific volume 3-1 v = constant heat rejection to initial state =

(a) Show the cycle on P-v and T-s diagrams.

(b) Calculate the maximum temperature in the cycle.

(c) Determine the thermal efficiency.