Abstract
The model of the hybrid solid oxide fuel cell (SOFC) and gas turbine (GT) cycle is used to evaluate the impacts of the inlet fuel composition on the specific work and efficiency of the cycle. In order to perform the analysis, the system fueled with methane is considered as the reference case. For alternative cases, methane is partially replaced with hydrogen, carbon dioxide, carbon monoxide, and nitrogen with an increment of 5% at each step. The results indicate that the trend of the variations and the magnitude of the changes depend on the replacing gases. The specific work and efficiency of the SOFC, GT, and cycle as a whole for the cycle with and without anode recirculation can increased, decreased, or remain unaffected when methane is replaced with these species. All these trends are justified by investigating the system's operational parameters. This study confirms the importance of the fuel composition impacts on the SOFC–GT cycle performance.
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