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Advanced Thermodynamics for Engineers, 2nd Edition
book

Advanced Thermodynamics for Engineers, 2nd Edition

by Ali Turan, D. Winterbone
February 2015
Intermediate to advanced content levelIntermediate to advanced
578 pages
19h 27m
English
Butterworth-Heinemann
Content preview from Advanced Thermodynamics for Engineers, 2nd Edition
In the case of a reversible engine, SDS ¼ 0 because entro py flow is conserved, i.e.
Q
H
T
H
¼
Q
0
T
0
(4.19)
Hence the unavailable energy for a reversible engine is T
0
DS
H
while the irreversibility is zero.
However, for all other engines it is nonzero. The available energy is depicted on Fig. 4.7 by the area
marked ‘A’, while the energy ‘lost’ due to irreversibility is denoted ‘I’ and is defined as
E
irrev
¼ T
0
ðDS
0
DS
H
Þ: (4.20)
4.7 AVAILABILITY BALANCE FOR A CLOSED SYSTEM
The approaches derived previously, work very well when it is possible to define the changes occurring
inside the system. However, it is not always possible to do this and it is useful to derive ...
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Publisher Resources

ISBN: 9780444633736