CFD modelling of two-phase dynamics based on agglomerate CL in PEMFC

초록

Computational fluid dynamics (CFD) modelling of proton exchange membrane fuel cells (PEMFCs) was conducted based on catalyst ahhlomerate framework using finite volume method. The presented model describes gas- and dissolved-phase fuel and oxidizer transport simultaneously in catalyst layers consisting of fluid, ionomer and catalyst phase. Three phase water transport modes, including gas-, liquid-, and dissolved-water, were assumed. Model validations wter performed with experimental data. With the presented model, key transport and electrochemical phenomena inside proton exchange membrane and micro-porous layer (MPL) were investigated to understand the reasons for the local distribution of each phemonenon and special role of MPL. Consequently, the optimized design of PEMFC including MPL was extracted using CFD model.