Page 56 - High Temperature Solid Oxide Fuel Cells Fundamentals, Design and Applications
P. 56
W
m
I I 1 1 I I I I I 1
0.9
0.8
2
k
0.7 s
Y
$' 0.6 L
aJ .-
E 0.5
0.4 _-------
0.3
0.2
0.1
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 I
u 1 U0.C. --+
Figure 2.8 Efficiency of file1 cells (Jraction of the change in the oxygen Gibbs enthalpy which is turned into useful energy) versus the quotient load voltagelopen-circuit
voltage:---, calculatedusinganequivulentcircuit (1 958-1 967):---calculatedusing transport equations(l978-1981).
