Design Principles of SOFC Hybrid Systems

The other strategy is the SOFC cooling by an external cooler (EXCO) fed with the flue gas that has been cooled by the heating of air and fuel. The SOFC module is the heat source for the GT cycle and the air is heated by the flue gas as in the generalised model. The integrated gas heater can be heated by radiation and allows an optimisation of the temperature level of the SOFC cooling together with 

Intermediate expansion INEX Externai cooling EXCO  

1 SOFC vvu.sle heal exlracllon (sub-systems) 2-11 pressure levels (systems) 1 pressure level (system) 

2 Pressure difference HEX walls Maximal pressure difference Only pressure loss 

3 Limit for air inlet temperature in SOFC Gas turbine outlet temperature SOFC temperature 

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