一种质子交换膜燃料电池冷启动分层数值模型

A Layered Numerical Model for Cold Start in Proton Exchange Membrane Fuel Cell

摘要:

针对质子交换膜燃料电池在低温环境启动时伴随的复杂物理和化学现象，搭建了一种新的燃料电池单电池冷启动数值模型，该模型全面包含了燃料电池低温启动的电化学反应机理、水热传递机理、水相变机理等.研究了催化层聚合物体积分数、孔隙率、质子交换膜厚度三个因素对低温冷启动的影响.最终提出了储水量(WSC)这一预测燃料电池低温冷启动能力的指标.

Abstract:

In terms of complex physical and chemical phenomenon of proton exchange membrane fuel cell (PEMFC) in cold start, a novel numerical model of PEMFC in cold start was developed. The model comprehensively considered electrochemical reaction, thermal and water and phase change mechanism in cold start. Three factors, ionomer volume fraction in catalyst layer, porosity and membrane thickness, were investigated. The indicator of water storage capacity(WSC) was finally introduced to evaluate the cold start capability of PEMFC.