预测PEM燃料电池膜水化循环寿命的数学模型
A Mathematical Model for Predicting the Life of PEM Fuel Cell Membranes Subjected to Hydration Cycling
摘要：
在典型的PEM燃料电池操作条件下，膜电极组件的一部分由于入口气体RH和/或流速的变化而经受湿度循环。循环膜水合/脱水将导致无约束膜的循环溶胀/收缩。在受约束的膜中，它引起循环应力，导致邻近气体入口的区域中的机械故障。建立了预测质子交换膜燃料电池膜水化循环寿命的数学模型。该模型预测膜的寿命作为RH循环振幅和膜的机械性能的函数。建模框架由三个模型组成：一个燃料电池RH分布模型，一个水合/脱水诱导的应力模型，预测膜中的应力分布，和一个损伤累积模型，预测膜的寿命。该模型的组成部分以及整体框架的简短说明的文件。该模型用于GORE-SELECT膜的寿命预测。
英文摘要：
Under typical PEM fuel cell operating conditions, part of membrane electrode assembly is subjected to humidity cycling due to variation of inlet gas RH and/or flow rate. Cyclic membrane hydration/dehydration would cause cyclic swelling/shrinking of the unconstrained membrane. In a constrained membrane, it causes cyclic stress resulting in mechanical failure in the area adjacent to the gas inlet. A mathematical modeling framework for prediction of the lifetime of a PEM FC membrane subjected to hydration cycling is developed in this paper. The model predicts membrane lifetime as a function of RH cycling amplitude and membrane mechanical properties. The modeling framework consists of three model components: a fuel cell RH distribution model, a hydration/dehydration induced stress model that predicts stress distribution in the membrane, and a damage accrual model that predicts membrane life-time. Short descriptions of the model components along with overall framework are presented in the paper. The model was used for lifetime prediction of a GORE-SELECT membrane.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
