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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
472 Fuel Cells
11.3.2 Anode Electrode
Water transport by diffusion mass transport
d
d
HO,a
2
2
2
0
x
z
= .
(11.39a)
Integration of this equation and substituting boundary conditions lead to
the expression for water mass ux based on Fick’s law of diffusion as
JD
xx
L
HO,a aHO,H
eff
HO,a HO,ae
a
222
22
=
()
ρ
,
(11.39b)
where
x
HO,a
2
= water concentration at the anode surface
x
HO,ae
2
= water concentration at the anode–electrolyte interface
This equation (Equation 11.39b) for water mass ux through the anode can
also be expressed in a form analogous to an electrical circuit as
J
xx
R
HO,a a
HO,a O,ae
HO,a
2
22
2
=
()
ρ ,
(11.40a)
where
R
L
D
HO,a
a
HO,H
eff
2
22
= .
(11.40b)
Consider
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Publisher Resources

ISBN: 9781420089684