An Improved Dynamic Model for Proton Exchange Membrane Fuel Cell Systems

Abstract:

To investigate dynamical behaviors of membrane water content in a proton exchange membrane fuel cell (PEMFC), a dynamic system model was established, consisting of a gas diffusion layer (GDL) and a membrane electrode assembly (MEA). The simulation results show that there is a small difference between the outputs of modified PEMFC system model and experimental data. The dynamic influence of the water content on stack voltage is plausible under more realistic operating condition. The effect of manipulating variables on chemical reaction and transfer process can also be refluxed by the modified PEMFC system model which can be used to control and analyze the membrane water content and optimize a PEMFC system.