基于COMSOL Multiphysics的PEMFC的数值模拟

PEMFC Numerical Simulation Based on COMSOL Multiphysics

由于燃料电池内的环境是高度反应性的,因此,很难在电池运行时进行许多详细的在线测量工作。为了更好地了解电池内复杂的流动结构、化学组分的传递过程、优化水、热管理以及缩短电池的设计和优化周期,这些信息常需要通过建立数学模型和数值模拟工作来寻求。在建立了二维全电池模型的基础上,在COMSOL Multiphysics 3.3a环境下对全电池的内部电流密度、气体流速、气体压力和含水量等进行了数值模拟,并得出在模拟条件下,最大电流密度为9 027 A/m2、最大气体流速为0.7 m/s。

For the high-speed reaction in a fuel cell, some data are immeasurable when the cell is in function. In order to get a better understanding of the complex internal flow structure, the transmission of chemical composition, optimize water and thermal management, and to shorten the design and optimization cycle for a fuel cell, a mathematic model and numerical simulation are needed. Based on COMSOL Muhiphysics 3.3a, a two-dimension cell model was built and numerical simulation was conducted on the electric current density, gas velocity, gas pressure and moisture of a fuel cell. In the simulation process, the maximum electric current density is 9 027 A/m^2 and the maximum flow velocity is 0.7 m/s.