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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
148 Fuel Cells
QH
n
nelec-genfcr
f
=− ()
()
1 φ
, (4.95)
where ΔH
cr
is the enthalpy of formation for the chemical reaction.
4.8.3 Total Heat Generation in a Fuel Cell
Combining Equations 4.93a and 4.95, the total heat generation per cell is
given as
QnTS IE
VH
genffrev cfcr
=−+−
+−
φφ

()()()
()∆∆
1 nn
f
(4.96a)
or
QnTS IR
Hn
genff
2
cfcr f
=−+
+−
φφ

() ()
()∆∆
1 (4.96b)
or
Q
ITS
nF
IR H
I
nF
genf
e
2
cfcr
e
=
+
+−
φφ
()
()
()
∆1 . (4.96c)
For ϕ
f
= 1, that is, all fuel moles going through electrochemical reaction, the
equation reduces to
QI
TS
nF
EV
gen
e
re
vc
=
+−
()
()
for a cell (4.97a)
and
QNI
TS
nF
EV
genc
e
re
vc
=
+−
()
()
for a stack. (4.97b)
Anot ...
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Publisher Resources

ISBN: 9781420089684