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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 Fig. 17.7, it is possible to evaluate the mean temperature of energy transfer. If the gas were an
ideal one then its enthalpy would be
h ¼
Z
T
0
c
p
dT ¼
Z
S
0
Tds; along an isobar: (17.17)
This would result in mean temperatures of energy addition and rejection of
T
B
¼
R
3
2
Tds
s
3
s
2
; (17.18)
and
T
A
¼
R
4
1
Tds
s
4
s
1
: (17.19)
This means that, in Fig. 17.7, the areas 23562 and EF56E (which represent the energy addition) are
equal, as are the areas for energy rejection 14561 and HG56H. Similarly, the areas represe nting work
(12341 and EFGHE) are equal. The efficiency of the Joule cycle is given by
h
Joule
¼
1
Q
A
Q
B
¼
1
T
A
ðs
5
s
6
Þ
T
B
ðs
5
s
6
Þ
¼ 1
T
A
T
B
: (17.20)
This is
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Publisher Resources

ISBN: 9780444633736