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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
rates of combustion implied by the Otto cycle, but still results in an unrealistic combustion pattern. The
Diesel cycle is shown in Fig. 3.14.
The work done in a Diesel cycle is
W ¼
I
pdV ¼
p
1
V
1
p
2
V
2
k 1
þ p
2
ðV
3
V
2
Þþ
p
3
V
3
p
4
V
4
k 1
¼ p
2
V
2
ðb 1Þþ
1
k 1
p
1
V
1
p
2
V
2
1 þ
p
3
V
3
p
2
V
2
p
4
V
4
p
2
V
2

¼
mRT
2
k 1
kðb 1Þ
1
r
k1
ðb
k
1Þ
(3.18)
where b defines the size of the constant pressure heat addition region, b ¼ V
3
=V
2
. The effect of the
constant pressure heat addition region is to reduce the expansion ratio of the cycle, r
e
¼ V
4
=V
3
¼ r=b.
This has a large effect on the efficiency of the cycle.
The heat addition is
Q
23
¼ mc
p
ðT
3
T
2
Þ¼
mkR
k 1
ðT
3
T
2
Þ¼
mkRT
2
k 1
ðb 1Þ :
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Publisher Resources

ISBN: 9780444633736