| 초록 |
A two-dimensional computational fluid dynamics model of proton exchange membrane fuel cell (PEMFC) was formulated by taking into account liquid water transport through the membrane-electrode-assembly (MEA) on basis of the agglomerate catalyst framework. Various modes of water transport in PEMFC, including electro-osmotic drag, back diffusion, water generation by oxygen reduction reaction, etc., were considered under existence of three-phase water, i.e. gas-, liquid- and dissolved-phase water. The presented model was validated with cell polarization data taken from experimental data prepared by the authors, representing good agreements. Various parameters were investigated to analyze the influence on cell polarizations and summarized. |
