NDLI: Three-Dimensional Simulations of Transient Response of PEM Fuel Cells

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Yesilyurt, Serhat
Copyright Year	2007
Abstract	Transients have utmost importance in the lifetime and performance degradation of PEM fuel cells. Recent studies show that cyclic transients can induce hygro-thermal fatigue. In particular, the amount of water in the membrane varies significantly during transients, and determines the ionic conductivity and the structural properties of the membrane. In this work, we present three-dimensional time-dependent simulations and analysis of the transport in PEM fuel cells. U-sections of anode and cathode serpentine flow channels, anode and cathode gas diffusion layers, and the membrane sandwiched between them are modeled using incompressible Navier-Stokes equations in the gas flow channels, Maxwell-Stefan equations in the channels and gas diffusion layers, advection-diffusion-type equation for water transport in the membrane and Ohm’s law for ionic currents in the membrane and electric currents in gas diffusion electrodes. Transient responses to step changes in load, pressure and the relative humidity of the cathode are obtained from simulations, which are conducted by means of a third party finite-element package, COMSOL.
Starting Page	597
Ending Page	605
Page Count	9
File Format	PDF
ISBN	0791843009
DOI	10.1115/IMECE2007-42146
e-ISBN	0791838129
Volume Number	Volume 6: Energy Systems: Analysis, Thermodynamics and Sustainability
Conference Proceedings	ASME 2007 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2007-11-11
Publisher Place	Seattle, Washington, USA
Access Restriction	Subscribed
Subject Keyword	Water Membranes Navier-stokes equations Ionic conductivity Mechanical properties Fatigue Diffusion (physics) Flow (dynamics) Pressure Stress Transients (dynamics) Electrodes Simulation Gas flow Gas diffusion layers Engineering simulation Finite element analysis Currents Proton exchange membrane fuel cells Anodes Electric current
Content Type	Text
Resource Type	Article

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