
487Simulation Model for Analysis and Design of Fuel Cells
EE
RT
F
P
PP
0
2
2
2
=−
rev
HO
H
O
2
ln
/
.
Reversible voltage is given as
E
g
nF
rev
f
e
=
−∆
0
.
At an operating temperature of T = 80°C = 353 K,
g
f
228,350 J/mo
0
=−
from Table 4.3 and reversible voltage is given as
E
g
nF
rev
f
=
−
=−
−
∆
0
228 350
296 485
(,)
()(, )
E
rev
V.
0
1 183= .
The open circuit voltage for this fuel cell is given as
EE
RT
F
P
PP
E
0
2
12
0
2
1 183
8 314 353
2
=−
=−
×
rev
0
HO
H
O
2
ln
.
.
(
/
2296 485
0 347
01 042
1 183
12
0
)( ,)
ln
.
(.)( .)
.
/
E =−0.015211ln(7.57216)
0.03077
1.152 V.
E
E
0
0
1 183=−
=
.
In order to estimate the activation loss, ohmic loss, and mass concen-
tration loss, it is necessary to compute gas and water concentrations at ...