Two Dimension Model of Solid Oxide Fuel Cell Using COMSOL

K. Song, and H. Knickle
University of Rhode Island, Kingston, RI, USA

As a promising candidate for future electricity providing, solid oxide fuel cell (SOFC) exhibit high efficiency, quiet operation and near zero emissions. In this work, two 2-dimension models of SOFC are constructed in COMSOL. Model 1 includes porous anode and cathode simulations with a thin electrolyte. The fuel cell is operated isothermally under fixed output voltages of 0.4, 0.6 and 0.8. The Maxwell-Stefan equation is applied in this model to calculate the mass transport process. For the boundary conditions, a fixed mass fraction is used for both the air and hydrogen gas inlet condition. Pressure is fixed at the inlet and outlet on both sides of the cell.
In Model 2 we introduce an anode gas channel running the full height of the anode instead of the porous media with limited area entrance and exit. The hydrogen transport behavior in the anode channel is taken into account. The same boundary conditions as in Model 1 are used. The simulation results of these two models are compared to study channel effects.