Page 104 - High Temperature Solid Oxide Fuel Cells Fundamentals, Design and Applications

Thermodynamics 8 1

The combination of a SOFC with a heat engine allows an extremely high
electric efficiency. Any real combination of a SOFC and a heat engine is based on
a reversible system but a simplified version can be used to analyse the principles
of the design of a combined SOFC-heat engine. It is important that the cell itself
and not the flue gas is considered as the heat source. Integration of fuel
processing is another important factor in achieving a high efficiency since the
embedded fuel processor can be supplied with a certain amount of entropy from
the cell heat. This entropy is used for the reforming reaction and need not be
transported to the environment as an entropy loss.

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