Effect of interconnect creep on long-term performance of SOFC of one cell stacks

W. N. Liu, X. Sun, M. A. Khaleel

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

1 Citation (Scopus)

Abstract

High temperature ferritic alloys are potential candidates as interconnect (IC) materials and spacers due to their low cost and CTE compatibility with other SOFC components for most of the solid oxide fuel cells (SOFC) under development in the SECA program. Possible creep deformation of IC under the typical cell operating temperature should not be neglected. In this paper, the effects of interconnect creep behavior on stack geometry change and stress redistribution of different cell components are predicted and summarized. The goal of the study is to investigate the performance of the fuel cell stack by obtaining the fuel and air channel geometry changes due to creep of the ferritic stainless steel interconnect, therefore indicating possible SOFC performance change under long term operations. IC creep models were incorporated into SOFC-MP and Mentat FC, and finite element analyses were performed to quantify the deformed configuration of the SOFC stack under the long term steady state operating temperature. It is found that creep behavior of the ferritic stainless steel IC contributes to narrowing of both the fuel and the air flow channels. In addition, stress re-distribution of the cell components suggests the need for a compliant sealing material that also relaxes at operating temperature.

Original languageEnglish
Title of host publicationCeramic Engineering and Science Proceedings
Pages53-63
Number of pages11
Volume29
Edition5
Publication statusPublished - 27 Mar 2009
Externally publishedYes
EventAdvances in Solid Oxide Fuel Cells IV - 32nd International Conference on Advanced Ceramics and Composites - Daytona Beach, FL, United States
Duration: 27 Jan 20081 Feb 2008

Other

OtherAdvances in Solid Oxide Fuel Cells IV - 32nd International Conference on Advanced Ceramics and Composites
CountryUnited States
CityDaytona Beach, FL
Period27/1/081/2/08

Fingerprint

Solid oxide fuel cells (SOFC)
Creep
Stainless Steel
Ferritic steel
Stainless steel
Temperature
Geometry
Sealants
Channel flow
Air
Fuel cells
Cells
Costs

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Liu, W. N., Sun, X., & Khaleel, M. A. (2009). Effect of interconnect creep on long-term performance of SOFC of one cell stacks. In Ceramic Engineering and Science Proceedings (5 ed., Vol. 29, pp. 53-63)

Effect of interconnect creep on long-term performance of SOFC of one cell stacks. / Liu, W. N.; Sun, X.; Khaleel, M. A.

Ceramic Engineering and Science Proceedings. Vol. 29 5. ed. 2009. p. 53-63.

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

Liu, WN, Sun, X & Khaleel, MA 2009, Effect of interconnect creep on long-term performance of SOFC of one cell stacks. in Ceramic Engineering and Science Proceedings. 5 edn, vol. 29, pp. 53-63, Advances in Solid Oxide Fuel Cells IV - 32nd International Conference on Advanced Ceramics and Composites, Daytona Beach, FL, United States, 27/1/08.
Liu WN, Sun X, Khaleel MA. Effect of interconnect creep on long-term performance of SOFC of one cell stacks. In Ceramic Engineering and Science Proceedings. 5 ed. Vol. 29. 2009. p. 53-63
Liu, W. N. ; Sun, X. ; Khaleel, M. A. / Effect of interconnect creep on long-term performance of SOFC of one cell stacks. Ceramic Engineering and Science Proceedings. Vol. 29 5. ed. 2009. pp. 53-63
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