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Fuel Cells
book

Fuel Cells

by Shripad T. Revankar, Pradip Majumdar
May 2014
Beginner to intermediate content levelBeginner to intermediate
748 pages
23h 13m
English
CRC Press
Content preview from Fuel Cells
492 Fuel Cells
For j = 0.5 A/cm
2
,
D
H
2
O
eff2
cm /s
38 10
6
.
and L
e
= 0.01 cm, Equation
E11.3-3 reduces to
44. β
o2
4
6
exp 5.978 10
0.5 0.01
3.86 10
14
×
×
=
C ..095
4.4β
o
+ 2.169 C
2
= 14.095 (E11.3-4)
Solving Equations E11.3-2 and E11.3-4, we get
β
o
= −1.3965 and C
2
= 9.3314.
Variation of water content in the membrane is given by Equation
E11.3-1 as
λ
m
= −6.1446 + 9.3314 exp(154.8705jz). (E11.3-5)
For j = 0.5 A/cm
2
, the equation reduces to
λ
m
= −6.1446 + 9.3314 exp(77.435z). (E11.3-6)
Substituting, the average water content in the membrane is given as
λλ
m
e
m
d
e
=
1
0
L
x
L
λ
m
e
77.435
()
d
e
=− +
1
6 1446 9 3314
0
L
z
z
L
..e
λ
m
e
=−
+−
6 1446
722 577
1
77 435
.
.
()
.
e
.
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Publisher Resources

ISBN: 9781420089684