NUMERICAL COMPUTATION OF MULTI COMPONENT TWO PHASE FLOW IN THE CATHODE OF PEM FUEL CELLS
Publish place: 15th Annual Conference of Mechanical Engineering
Publish Year: 1386
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISME15_499
تاریخ نمایه سازی: 8 فروردین 1386
Abstract:
A two dimensional, unsteady, isothermal and two-phase flow of reactant-product mixture in the air-side electrode of proton exchange membrane fuel cells (PEMFC) is studied numerically in the present study. The mixture is composed of oxygen, nitrogen, liquid water and water vapor. The overning equations are two species conservation, a single momentum equation for mobile mixture, liquid mass conservation, and the whole mixture mass conservation. In this study, liquid mass conservation is used to calculate the saturation, so, the effect of liquid phase velocity and also saturation at previous time step are accounted in calculating the next time step saturation. The capillary pressure was used to express the slip velocity between the phases. The strongly coupled equations are solved using the finite volume SIMPLER scheme of Patankar (1984). The computational domain consists of an open area (gas delivery channel), and a porous Gas Diffusion Layer (GDL). A single set of governing equations are solved for both sub domains with respect to each sub domain property. The Comparison between the numerical current density and that of experimental (Ticianelli et al.(1988)) shows a good agreement.
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Authors
Khakbaz Baboli
Department of Mechanical Engineering Amirkabir University of Technology (Tehran Polytechnic) Tehran, Iran,Graduate Student, member of Energy Conversion Research Laboratory.
Kermani
Department of Mechanical Engineering Amirkabir University of Technology (Tehran Polytechnic) Tehran, Iran, Address all correspondence to this author, member of Energy Conversion Research Laboratory.
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