A Performance Analysis of a Solid Oxide Fuel Cell - Micro Gas Turbine Hybrid System Using Biogas

This paper presents a performance analysis for a Solid Oxide Fuel Cell (SOFC) - Micro Gas Turbine (MGT) hybrid power system using biogas. It was assumed that the supplied biogas consisted of CH4 and CO2; the performance was predicted comprehensively while the concentrations of the both components were varied. The concentration of CH4 in biogas was varied from 100 [%] to 20[%]. The obtained results figured the system performance degradation with decreasing CH4 concentration. It also suggested designing the cell active area to fulfil the requirements for an electrical capacity of 220 [kW]. It was found that lager cell active area was required while the CH4 concentration diluted. The results are promising for the future use of biogas in SOFC-MGT hybrid systems.