NDLI: Combining CFD and Stress Models for PEM Cells: Initial Development

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Martinez-Baca, Carlos Travis, Rowland
Copyright Year	2004
Abstract	The aim of this work is to determine the relationship between the operational characteristics of a Polymer Electrolyte Membrane (PEM) fuel cell, and the relevant materials issues and in particular mechanical stresses that develop. A three dimensional, non-isothernal, single phase model of a single channel PEM fuel cell is developed to investigate the impact of temperature variation on the Membrane Electrode Assembly (MEA). The model accounts for heat transfer in solids as well as in the multi-component mixture of gases, convection and diffusion of different species in the porous electrodes and the channels, electrochemical reactions and transport of water and ions through the PEM. This model has been numerically implemented in a commercial Computational Fluid Dynamic (CFD), finite volume based code. Temperature contours derived from the model were then exported to a commercial Finite Element (FE) code to analyse the relevant mechanical issues of the PEM and in particular thermomechanical stresses that develop. Initial results verify that, even considering the polymer electrolyte membrane in isolation with mechanically free boundary conditions, there is a significant temperature difference leading to tensile stresses of up to 2.1 MPa within the membrane.
Sponsorship	Nanotechnology Institute
Starting Page	183
Ending Page	188
Page Count	6
File Format	PDF
ISBN	0791841650
DOI	10.1115/FUELCELL2004-2469
Volume Number	2nd International Conference on Fuel Cell Science, Engineering and Technology
Conference Proceedings	ASME 2004 2nd International Conference on Fuel Cell Science, Engineering and Technology
Language	English
Publisher Date	2004-06-14
Publisher Place	Rochester, New York, USA
Access Restriction	Subscribed
Subject Keyword	Water Electrochemical reactions Temperature Membranes Computational fluid dynamics Ions Diffusion (physics) Stress Convection Thermomechanics Electrodes Gases Proton exchange membranes Fuel cells Membrane electrode assemblies Boundary-value problems Solids Tension Finite element analysis Proton exchange membrane fuel cells Heat transfer
Content Type	Text
Resource Type	Article

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