5. Gas Power Cycle in a Closed System with External Heat ExchangeAir in a closed system undergoes the following reversible three-step cycle:1-2 Isothermal compression of air at T1 = 27°C. The initial pressure is p1 = 2bar2-3 Isochoric heating to T3 = 1200K .%3D3-1Adiabatic reversible expansion to state 1.Consider air as ideal gas with variable specific heats, and gas constant RkJ0.287kgK'As you solve the problem, populate the table with the data you need. Use free columns as you like.StateT/p/v/u/h/123a) Draw the process curve in a p-v-diagram, and in a T-s-diagram.b) Determine the volume V2 = V3c) Determine work and heat per unit mass of air for each step.d) Determine the thermal efficiency of the cycle.e) The engine runs at 1800 rpm and delivers 12 kW of power. Determine the air mass in the engineand the swept volume. The engine is externally heated, and does not exchange air with thesurroundings.

Answered: Image /qna-images/answer/42ee3a1d-ad6b-4d02-ba85-4dbcf9d71bf6.jpg

Air in a closed system undergoes the following reversible three-step cycle: 1-2 Isothermal compression of air at T1 = 27°C . The initial pressure is P1 = 2bar 2-3 Isochoric heating to T3 = 1200K . 3-1 Adiabatic reversible expansion to state 1. kJ Consider air as ideal gas with variable specific heats, and gas constant R = 0.287 kgK

Air in a closed system undergoes the following reversible three-step cycle: 1-2 Isothermal compression of air at T1 = 27°C . The initial pressure is P1 = 2bar 2-3 Isochoric heating to T3 = 1200K . 3-1 Adiabatic reversible expansion to state 1. kJ Consider air as ideal gas with variable specific heats, and gas constant R = 0.287 kgK

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

5. Gas Power Cycle in a Closed System with External Heat Exchange
Air in a closed system undergoes the following reversible three-step cycle:
1-2 Isothermal compression of air at T1 = 27°C. The initial pressure is p1 = 2bar
2-3 Isochoric heating to T3 = 1200K .
%3D
3-1
Adiabatic reversible expansion to state 1.
Consider air as ideal gas with variable specific heats, and gas constant R
kJ
0.287
kgK'
As you solve the problem, populate the table with the data you need. Use free columns as you like.
State
T/
p/
v/
u/
h/
1
2
3
a) Draw the process curve in a p-v-diagram, and in a T-s-diagram.
b) Determine the volume V2 = V3
c) Determine work and heat per unit mass of air for each step.
d) Determine the thermal efficiency of the cycle.
e) The engine runs at 1800 rpm and delivers 12 kW of power. Determine the air mass in the engine
and the swept volume. The engine is externally heated, and does not exchange air with the
surroundings.

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