Show simple item record

contributor authorY. Zhou
contributor authorG. Lin
contributor authorA. J. Shih
contributor authorS. J. Hu
date accessioned2017-05-09T00:33:20Z
date available2017-05-09T00:33:20Z
date copyrightNovember, 2009
date issued2009
identifier issn2381-6872
identifier otherJFCSAU-28939#041005_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/140810
description abstractThe clamping pressure used in assembling a proton exchange membrane (PEM) fuel cell stack can have significant effects on the overall cell performance. The pressure causes stack deformation, particularly in the gas diffusion layer (GDL), and impacts gas mass transfer and electrical contact resistance. Existing research for analyzing the assembly pressure effects is mostly experimental. This paper develops a sequential approach to study the pressure effects by combining the mechanical and electrochemical phenomena in fuel cells. The model integrates gas mass transfer analysis based on the deformed GDL geometry and modified parameters with the microscale electrical contact resistance analysis. The modeling results reveal that higher assembly pressure increases cell resistance to gas mass transfer, causes an uneven current density distribution, and reduces electrical contact resistance. These combined effects show that as the assembly pressure increases, the PEM fuel cell power output increases first to a maximum and then decreases over a wide range of pressures. An optimum assembly pressure is observed. The model is validated against published experimental data with good agreements. This study provides a basis for determining the assembly pressure required for optimizing PEM fuel cell performance.
publisherThe American Society of Mechanical Engineers (ASME)
titleMultiphysics Modeling of Assembly Pressure Effects on Proton Exchange Membrane Fuel Cell Performance
typeJournal Paper
journal volume6
journal issue4
journal titleJournal of Fuel Cell Science and Technology
identifier doi10.1115/1.3081426
journal fristpage41005
identifier eissn2381-6910
keywordsPressure
keywordsMass transfer
keywordsManufacturing
keywordsProton exchange membrane fuel cells
keywordsGas diffusion layers
keywordsContact resistance
keywordsDeformation AND Electrical resistance
treeJournal of Fuel Cell Science and Technology:;2009:;volume( 006 ):;issue: 004
contenttypeFulltext


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record