Abstract
The use of biogas and ethanol as fuel for solid oxide fuel cell-gas turbine (SOFC-GT) hybrid system needs of the external steam reformer. As the steam reformer and air preheater are units that require high external energy input, the efficient heat management of the SOFC system is necessary. Thus, the aim of this study is to analyze the recycling of the SOFC exhaust gas in the SOFC-GT hybrid system supplying fuels as ethanol and biogas. The effect of the recirculation ratio of the anode exhaust gas on the performance of SOFC-GT hybrid system, i.e., the SOFC efficiency, the turbine to SOFC power ratio, and the overall efficiency of hybrid system was firstly investigated. Additionally, the recirculation of both anode gas and cathode gas in the SOFC-GT hybrid system was studied.
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