质子交换膜燃料电池中使用具有图案化湿膜的气体扩散层用于先进水管理的效果的模拟
Modelling the Effects of using Gas Diffusion Layers with Patterned Wettability for Advanced Water Management in Proton Exchange Membrane Fuel Cells
摘要：
提出了一个质子交换膜燃料电池（PEMFC）的宏观均相两相模型。该模型考虑了气体扩散层（GDL）的机械压缩，水的两相流动，气体物种的传输和反应气体的电化学反应。该模型被用来模拟的PEMFC与图案化的GDL的行为。的简化模型，只考虑机械压缩和两相流的结果进行比较，通过中子射线照相成像获得的实验异位渗吸数据。结果是一致的。此外，通过使用所有的模型功能，一个运行的燃料电池的模拟已被执行，以研究复杂的耦合在一个运行的燃料电池，并检查图案化的GDL效果。该模型证实，图案化的GDL设计从液态水中释放预定义的域，从而局部增加氧扩散率。
英文摘要：
We present a macrohomogeneous two-phase model of a proton exchange membrane fuel cell (PEMFC). The model takes into account the mechanical compression of the gas diffusion layer (GDL), the two-phase flow of water, the transport of the gas species and the electrochemical reaction of the reactant gases. The model was used to simulate the behavior of a PEMFC with a patterned GDL. The results of the reduced model, which considers only the mechanical compression and the two-phase flow, are compared to the experimental ex-situ imbibition data obtained by neutron radiography imaging. The results are in good agreement. Additionally, by using all model features, a simulation of an operating fuel cell has been performed to study the intricate couplings in an operating fuel cell and to examine the patterned GDL effects. The model confirms that the patterned GDL design liberates the pre-defined domains from liquid water and thus locally increases the oxygen diffusivity.
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