水冷型PEMFC的热管理研究

Study of thermal management in water-cooled PEMFC

质子交换膜燃料电池(PEMFC)电堆内气、水两相的分布和热量的产生与传递间相互影响。为提高电堆的性能和寿命,根据连续方程和质量守恒定律,建立了电堆内气、水两相传输的动态模型;根据能量守衡原理,建立了PEMFC电堆温度和冷却水温度的动态模型;并在此基础上采用李雅普诺夫函数反向递推法设计了一种非线性鲁棒控制器,使系统温度能在一定摄动范围内保持稳定。最后,在Matlab/Simulink平台上验证了该模型及控制策略的有效性。

The distributions of gas and liquid water,thermal generation and transferring are interacting with each other closely in proton exchange membrane fuel cell（PEMFC）.According to the continuity equation and law of mass conservation,a dynamic model of two-phase（gas and liquid water） transmission in PEMFC was established;and on the basis of energy conservation theory,models of stack temperature and cooling water temperature were developed;what＇s more,based on these foregoing models,a nonlinear robust controller was proposed by adopting the method of Lyapunov function reverse recursion.Finally,the effectiveness and robustness of the whole model and control strategies were verified on the platform of Matlab/Simulink.