Reduced Dimensional Computational Models of Polymer Electrolyte Membrane Fuel Cell Stacks (draft)

作者: Paul Chang , Keith Promislow , Brian Wetton

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摘要: A model of steady state operation of Polymer Electrolyte Membrane Fuel Cell (PEMFC) stacks with straight gas channels is presented. The model is based on a decoupling of transport in the downchannel direction from transport in the cross-channel plane. Further, cross-channel transport is approximated heuristically using onedimensional processes. The model takes into account the consumption of reactants down the channel, the effect of membrane hydration on its conductivity, water crossover through the membrane, the electrochemistry of the oxygen reduction reaction, thermal transport within the Membrane Electrode Assembly (MEA) and bipolar plates to the coolant, heat due to reaction and condensation and membrane resistance, electrical interaction between unit cells due to in-plane currents in the bipolar plates, and thermal coupling of unit cells through shared bipolar plates. The model corresponds to the …

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