Effects of geometrical and mechanical properties of various components on stresses of the seals in SOFCS

W. N. Liu, B. J. Koeppel, X. Sun, M. A. Khaleel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In this paper, numerical modeling was used to understand the effects of the geometry and mechanical properties of various components in SOFCs on the magnitude and distribution of stresses in the stack during operating and cooling processes. The results of these modeling analyses will help stack designers reduce high stresses in the seals of the stack so that structural failures are prevented and high stack mechanical reliability is achieved to meet technical targets. In general, it was found that the load carrying capacity of the cathode contact layer was advantageous for reducing the transmitted loads on the cell perimeter seal under operating environments of SOFCs, but the amount of reduction depends upon the relative stiffness values of the cell, interconnect, porous media, and support structures. Comparison to a frictionless sliding interface, a fully bonded interface resulted in 30-50% less transmitted load through the perimeter seal, with the greater reductions due to stiffer contact/media/interconnect structures. These results demonstrate that the mechanical contribution of the contact layer can be substantial and warrant design consideration.

Original languageEnglish
Title of host publicationAdvances in Solid Oxide Fuel Cells VI - A Collection of Papers Presented at the 34th International Conference on Advanced Ceramics and Composites, ICACC
Pages53-62
Number of pages10
Edition4
Publication statusPublished - 1 Dec 2010
EventAdvances in Solid Oxide Fuel Cells VI - 34th International Conference on Advanced Ceramics and Composites, ICACC - Daytona Beach, FL, United States
Duration: 24 Jan 201029 Jan 2010

Publication series

NameCeramic Engineering and Science Proceedings
Number4
Volume31
ISSN (Print)0196-6219

Other

OtherAdvances in Solid Oxide Fuel Cells VI - 34th International Conference on Advanced Ceramics and Composites, ICACC
CountryUnited States
CityDaytona Beach, FL
Period24/1/1029/1/10

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Liu, W. N., Koeppel, B. J., Sun, X., & Khaleel, M. A. (2010). Effects of geometrical and mechanical properties of various components on stresses of the seals in SOFCS. In Advances in Solid Oxide Fuel Cells VI - A Collection of Papers Presented at the 34th International Conference on Advanced Ceramics and Composites, ICACC (4 ed., pp. 53-62). (Ceramic Engineering and Science Proceedings; Vol. 31, No. 4).