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Two-dimensional modeling of a SOFC stack repeating unit

: Schöne, Jakob; Beckert, Wieland; Ganzer, Gregor; Pönicke, Andreas; Michaelis, Alexander

Cigolotti, V.:
5th European Fuel Cell Piero Lunghi Conference, EFC 2013. Proceedings : 11 - 13 December 2013, Rome, Italy
Rome: ENEA, 2013
ISBN: 978-88-8286-297-8
European Fuel Cell Piero Lunghi Conference (EFC) <5, 2013, Rome>
Conference Paper
Fraunhofer IKTS ()
SOFC system; simulation; eneramic

For a SOFC stack in a highly integrated micro SOFC system a two-dimensional model of one repeating unit is presented. The stack, with an electric power output of 150 W, comprises 40 planar cells in cross-flow configuration. The model includes the species and energy balances, reforming reactions and additionally an electrochemical sub model based on measured area-specific resistances (ASR). A porous media approach is used to minimize computational costs. The model is implemented in the finite volume solver FiPy based on programming language Python. With help of the model, different cell designs and operating conditions were compared with respect to their influence on cell performance. Furthermore, the effect of predefined cell defects (e.g. a crack of the electrolyte with hydrogen combustion or deactivated electrolyte regions) has been investigated.