Solid Oxide Fuel Cell (SOFC) is expected to be a candidate for distributed power sources in the next generation, due to its high efficiency, high-temperature waste heat utilization and low emission of pollutants to environment. In this study, two-dimensional simulation program of planar SOFC was made considering mass, charge and heat balances along flow directions and perpendicular to the electrolyte membrane, in order to get temperature and current density distributions along the flow direction. Following the unit-cell calculation, cycle analyses of SOFC combined with gas turbine were also performed. This simulation gives SOFC and gas turbine outputs, system output and efficiency and so on under parametric change of the inlet temperature of gas turbine, and SOFC's operating pressure, current density and gas circulation rate. The system efficiency increases with the increase of the SOFC pressure. Also the effects of cell temperature, average current density and recirculation ratio on system efficiencies are discussed.
