Abstract: A steady-state, three-dimensional, non-isothermal gas-liquid two-phase mathematical model of the proton exchange membrane fuel cell (PEMFC) was developed to study transport phenomena in the whole fuel cell. This comprehensive model accounted for almost all important transport phenomena in the fuel cell such as fluid flows, heat transfer, mass transfer, electrochemical kinetics and charge transfer, as well as the effect of phase change on mass transfer and temperature field. A special feature of this model was that it allowed detailed modeling and prediction of electrochemical kinetics. The transport of electrons in the backing layer and catalyst layer was accounted for, as well as the transport of protons in the membrane and catalyst layer. Spatial distributions of temperature, species concentrations and current were illustrated and discussed in detail.Lastly,a comparison of predicted performance and experimental data in literature was made to validate the mathematical model.

摘要： 为更好地模拟质子交换膜燃料电池内的复杂传递过程，发展了一个三维稳态的、非等温的气液两相流模型，模型综合考虑电池内的流动、传热、传质等过程，以及水的相变过程对电池内传质和温度场的影响.本模型的特性是可以详细地模拟和估计电极电化学动力学，考虑电子在扩散层和催化层，以及质子在膜相中的传递规律.通过数值计算得到了详细的组分浓度、电位和温度等在电池内的空间分布.比较了估算的极化性能与文献中的实验数据，结果表明两者较好地相符合.