Thermal-stress analyses of an operating planar solid oxide fuel cell with the bonded compliant seal design

Tsung-Leo Jiang, Ming Hong Chen

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

A thermo-electrochemical-structure model has been proposed in the present work to investigate the thermal behavior and the thermal-stress of a solid oxide fuel cell (SOFC) with the bonded compliant seal (BCS) design. A comprehensive numerical simulation model, employing the finite-volume approach, has been developed for the three-dimensional, multi-component, electrochemically, and chemically reacting flow of a single planar SOFC unit cell. The cell temperature predicted by the finite-volume model is imported to a finite-element model to estimate the thermal-stress with the BCS design. Effects of the cell voltage and the temperature non-uniformity on the thermal-stress of the SOFC have been investigated. Numerical results obtained from the present study show that an assumed isothermal SOFC configuration leads to an underestimate of the thermal-stress by 28% for the cell and 37% for the metal frame in comparison with those in practical operating conditions. Two factors are identified to be responsible for the thermal-stress. One is the residual stress, and the other is the temperature gradient. The dominant factor for the thermal-stress depends on the location and the cell voltage.

Original languageEnglish
Pages (from-to)8223-8234
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume34
Issue number19
DOIs
Publication statusPublished - 2009 Oct 1

Fingerprint

solid oxide fuel cells
thermal stresses
Solid oxide fuel cells (SOFC)
Thermal stress
Seals
cells
reacting flow
Electric potential
electric potential
Model structures
nonuniformity
Thermal gradients
residual stress
Residual stresses
temperature gradients
Temperature
temperature
Computer simulation
estimates
configurations

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

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abstract = "A thermo-electrochemical-structure model has been proposed in the present work to investigate the thermal behavior and the thermal-stress of a solid oxide fuel cell (SOFC) with the bonded compliant seal (BCS) design. A comprehensive numerical simulation model, employing the finite-volume approach, has been developed for the three-dimensional, multi-component, electrochemically, and chemically reacting flow of a single planar SOFC unit cell. The cell temperature predicted by the finite-volume model is imported to a finite-element model to estimate the thermal-stress with the BCS design. Effects of the cell voltage and the temperature non-uniformity on the thermal-stress of the SOFC have been investigated. Numerical results obtained from the present study show that an assumed isothermal SOFC configuration leads to an underestimate of the thermal-stress by 28{\%} for the cell and 37{\%} for the metal frame in comparison with those in practical operating conditions. Two factors are identified to be responsible for the thermal-stress. One is the residual stress, and the other is the temperature gradient. The dominant factor for the thermal-stress depends on the location and the cell voltage.",
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Thermal-stress analyses of an operating planar solid oxide fuel cell with the bonded compliant seal design. / Jiang, Tsung-Leo; Chen, Ming Hong.

In: International Journal of Hydrogen Energy, Vol. 34, No. 19, 01.10.2009, p. 8223-8234.

Research output: Contribution to journalArticle

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