This paper presents the steady state modeling and analysis of a Solid Oxide Fuel Cell – Gas Turbine (SOFC-GT) hybrid combustor system. Rising fossil fuel cost and greenhouse gas emissions have renewed interest in high efficiency, low emission power generation, among which fuel cell-gas turbine hybrid cycles are attractive because the high temperature exhaust of the fuel cell can be used directly to drive the turbine. Following a review of the principal fuel cell types and SOFC-GT modeling literature, the Solid Oxide Fuel Cell was selected on account of its solid electrolyte, fuel flexibility and tolerance to impurities. A lumped-parameter, zero-dimensional, steady state model of the hybrid system was developed, comprising an electrochemical model of the SOFC stack incorporating activation, ohmic and concentration losses, together with mass and energy balance models of the combustor, heat exchanger and gas turbine. A representative case study using parameters typical of an anode-supported SOFC operating on internally reformed natural gas predicts a maximum power density of 0.449 W/cm² and a cell electrical efficiency of 51.6% (LHV basis), while the gas turbine sub-model achieves a simple-cycle thermal efficiency of about 19%. Comparison with published hybrid systems indicates that a fully integrated SOFC-GT plant based on this model would achieve an overall electrical efficiency in the region of 55-65%, consistent with previously reported hybrid systems.

Dr. Shailendra Kumar Bohidar, Deepak Joglekar,"Modeling and Analysis of a Hybrid Solid Oxide Fuel Cell – Gas Turbine (SOFC-GT) Combustor System" International Journal of Advanced Multidisciplinary Research and Educational Development, V2(4): Page(429-433) July - August 2026. ISSN: 3107-6513. www.ijamred.com. Published by Scientific and Academic Research Publishing.