An air-standard cycle with variable specific heats isexecuted in a closed system and is composed of the followingfour processes:1-2 v = constant heat addition from 14.7 psia and 80F inthe amount of 300 Btu/lbm2-3 P = constant heat addition to 3200 R3-4 Isentropic expansion to 14.7 psia4-1 P = constant heat rejection to initial state(a) Show the cycle on P-v and T-s diagrams.(b) Calculate the total heat input per unit mass.(c) Determine the thermal efficiency.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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An air-standard cycle with variable specific heats is
executed in a closed system and is composed of the following
four processes:
1-2 v = constant heat addition from 14.7 psia and 80F in
the amount of 300 Btu/lbm
2-3 P = constant heat addition to 3200 R
3-4 Isentropic expansion to 14.7 psia
4-1 P = constant heat rejection to initial state
(a) Show the cycle on P-v and T-s diagrams.
(b) Calculate the total heat input per unit mass.
(c) Determine the thermal efficiency.

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