基于两相混合流理论PEMFC含水量特性分析

Characteristic analysis of water content in proton exchange membrane fuel cell based on theory of two-phase mixture flow

质子交换膜燃料电池(PEMFC)中有效的水管理(尤其是两相水管理))和电池系统内部良好的水平衡是确保电池稳定运行及具有优良性能的关键因素之一。采用气液两相层流假设,使用两相混合流理论,建立了单流道常规流场质子交换膜燃料电池阳极出口端封闭的三维两相流等温数学模型,对三维空间中水的两相传递和分布特性进行分析,探讨不同湿度、不同温度下电极中液态水饱和度以及含水量的浓度变化。

Effective water management in the proton exchange membrane fuel cell （especially two-phase water management） and good water balance of the inner cell system is one of the key factors ensuring the battery stable operation and good performance. The gas-liquid two phase laminar flow assumption and the multiphase mixed flow theory were used to establish an three-dimensional two-phase flow mathematical model with single port conventional flow field of proton exchange membrane fuel cell anode outlet isothermal closed. The water two phase transmission and distribution characteristics in three-dimensional space were analyzed. The concentration change of the liquid water saturation and water content in the electrode under different humidity and temperature was discussed.