NDLI: Modeling Leakage With Mica-Based Compressive Seals for Solid Oxide Fuel Cells

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Christopher, K. Green Jeffrey, L. Streator Haynes, Comas
Copyright Year	2006
Abstract	Fuel cells represent a promising energy alternative to the traditional combustion of fossil fuels. In particular, solid oxide fuel cells (SOFCs) have been of interest due to their high energy densities and potential for stationary power applications. One of the key obstacles precluding the maturation and commercialization of planar SOFCs has been the lack of a robust sealant. This paper presents a computational model of leakage with the utilization of mica-based compressive seals. A finite element model is developed to ascertain the macroscopic stresses and deformations in the interface. In conjunction with the finite element model is a microscale contact mechanics model that accounts for the role of surface roughness in determining the mean interfacial gap at the interface. An averaged Reynolds equation derived from mixed lubrication theory is applied to model the leakage flow across the rough, annular interface. The composite model is applied as a predictive tool for assessing how certain physical parameters (i.e., seal material composition, compressive applied stress, surface finish, and interfacial conformity) affect seal leakage rates.
Sponsorship	Tribology Division
Starting Page	139
Ending Page	145
Page Count	7
File Format	PDF
ISBN	0791847829
DOI	10.1115/IMECE2006-15264
e-ISBN	0791837904
Volume Number	Tribology
Conference Proceedings	ASME 2006 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2006-11-05
Publisher Place	Chicago, Illinois, USA
Access Restriction	Subscribed
Subject Keyword	Leakage Solid oxide fuel cells Lubrication theory Deformation Microscale devices Contact mechanics Surface roughness Combustion Fossil fuels Modeling Stress Finite element model Finishes Composite materials Sealants Fuel cells Leakage flows
Content Type	Text
Resource Type	Article

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