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首页> 外文会议>International Conference Interdisciplinarity in Engineering >PEMFC Two-Dimensional Modelling of Reactant Species Transport Through Membrane-GDL System
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PEMFC Two-Dimensional Modelling of Reactant Species Transport Through Membrane-GDL System

机译：通过膜-GDL系统进行反应物种运输的PEMFC二维建模

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A proton exchange membrane (PEM) fuel cell has many distinctive features, like quick start-up, high power density, zero emissions and system robustness, which makes it an attractive alternative clean energy source. Comsol Multiphysics, a commercial solver based on the Finite Element Method (FEM) was used here for developing a two dimensional cross-the- channel (CTC) and through-the-membrane (TTM) model of a low temperature Proton Exchange Membrane Fuel cell (LT- PEMFC), based on the agglomerate model for cathode catalyst layer. The gaseous mass transport limitation effects produced by the variation of the ratio between the channel and rib (shoulder) lengths: L_(ch)/L_(rib) were investigated here, for fixed widths of the gas diffusion layer (GDL) and PEM membrane layers (W_d = 250 μm and W_M = 89 μm, respectively). Three cell models were developed here for numeric computation, having the following L_(ch)/L_(rib) ratios: 1.25 mm/0.5 mm, 1 mm/1 mm (base model) and 0.75 mm/0.5 mm. The total lengths of the inlet and outlet channels plus a channel rib were maintained constant at the value L_(cell) = 3 mm.
机译：质子交换膜（PEM）燃料电池具有许多独特的特征，如快速启动，高功率密度，零排放和系统稳健性，使其成为有吸引力的替代清洁能源。 COMSOL多发性，基于有限元方法（FEM）的商业求解器用于开发低温质子交换膜燃料电池的二维交叉通道（CTC）和膜（TTM）模型（LT- PEMFC），基于阴极催化剂层的凝聚模型。通过在此研究通道和肋（肩部）长度之间的比例的变化产生的气体质量传输限制效果：用于本发明的气体扩散层（GDL）和PEM膜的固定宽度的固定宽度研究了L_（CH）/ L_（肋）层（W_D =250μm和w_m =89μm）。这里开发了三个单元模型，用于数值计算，具有以下L_（CH）/ L_（肋）比率：1.25mm / 0.5mm，1mm / 1mm（基材模型）和0.75 mm / 0.5mm。入口和出口通道的总长度加上沟道肋在值L_（电池）= 3mm处保持恒定。

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