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Entropy and fuel cells 147

Table 9.3 Performance comparison of the integrated gas turbine and SOFC with and
without recuperator at maximum thermal efficiency.
Parameter With recuperator Without recuperator

Optimum pressure ratio 5.6 21.7
TIT (K) 1347 1384
Exhaust temperature (K) 614.6 735.3
Net power production (kW) 618.3 575.2
Thermal efficiency 0.658 0.612
SEG (J/molK) 251.1 286.2
Air flowrate (mol/s) 29.41 23.56

The heat integration allows to augment the thermal efficiency from 0.612 to
0.658 at the optimum operation. This gain in the thermal efficiency corre-
sponds to 35.1J/mol H 2 K reduction in the SEG.

References
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