Effects of anode porosity on thermal stress and failure probability of planar solid oxide fuel cell with bonded compliant seal

A three dimensional numerical model of a practical planar solid oxide fuel cell (SOFC) stack based on the finite element method is constructed to analyze the thermal stress generated at different uniform temperatures. Effects of cell positions, different compressive loads, and coefficient of thermal expansion (CTE) mismatch of different SOFC components on the thermal stress distribution are investigated in this work. Numerical results indicate that the maximum thermal stress appears at the corner of the interface between ceramic sealants and cells. Meanwhile the maximum thermal stress at high temperature is significantly larger than that at room temperature (RT) and presents linear growth with the increase of operating temperature. Since the SOFC stack is under the combined action of mechanical and thermal loads, the distribution of thermal stress in the components such as interconnects and ceramic sealants are greatly controlled by the CTE mismatch and scarcely influenced by the compressive loads.

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Thermal stress and probability of survival investigation in a multi-bundle integrated-planar solid oxide fuel cells IP-SOFC (integrated-planar solid oxide fuel cell)

Energy ◽

10.1016/j.energy.2014.01.017 ◽

2014 ◽

Vol 66 ◽

pp. 378-386 ◽

Cited By ~ 15

Author(s):

Hamid Mounir ◽

Mohamed Belaiche ◽

Abdellatif El Marjani ◽

Abdellah El Gharad

Keyword(s):

Fuel Cells ◽

Thermal Stress ◽

Fuel Cell ◽

Solid Oxide Fuel Cells ◽

Solid Oxide Fuel Cell ◽

Solid Oxide ◽

Oxide Fuel ◽

Probability Of Survival

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Effects of Flow Channel Arrangement and Electrolyte Thickness on Thermal Stress for Planar Solid Oxide Fuel Cell Stacks

ECS Transactions ◽

10.1149/10301.0767ecst ◽

2021 ◽

Vol 103 (1) ◽

pp. 767-784

Author(s):

Jianmin Zheng ◽

Liusheng Xiao ◽

Ming Chen ◽

Jinliang Yuan

Keyword(s):

Thermal Stress ◽

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Flow Channel ◽

Solid Oxide ◽

Oxide Fuel

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Effect of the geometrical size on time dependent failure probability of the solid oxide fuel cell

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2019.02.155 ◽

2019 ◽

Vol 44 (21) ◽

pp. 11033-11046 ◽

Cited By ~ 2

Author(s):

Yu-Cai Zhang ◽

Min-Jie Lu ◽

Wenchun Jiang ◽

Shan-Tung Tu ◽

Xian-Cheng Zhang

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Failure Probability ◽

Solid Oxide ◽

Time Dependent ◽

Oxide Fuel ◽

Geometrical Size ◽

Dependent Failure

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Thermal Stress Analysis of Solid Oxide Fuel Cell with Z-type and Serpentine-Type Channels Considering Pressure Drop

Journal of The Electrochemical Society ◽

10.1149/1945-7111/ab79aa ◽

2020 ◽

Vol 167 (4) ◽

pp. 044517

Author(s):

Congying Jiang ◽

Yuchen Gu ◽

Wanbing Guan ◽

Meng Ni ◽

Junkang Sang ◽

...

Keyword(s):

Thermal Stress ◽

Fuel Cell ◽

Pressure Drop ◽

Solid Oxide Fuel Cell ◽

Stress Analysis ◽

Solid Oxide ◽

Oxide Fuel ◽

Thermal Stress Analysis

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Effect of Temperature Fluctuation on Creep and Failure Probability for Planar Solid Oxide Fuel Cell

Journal of Fuel Cell Science and Technology ◽

10.1115/1.4031697 ◽

2015 ◽

Vol 12 (5) ◽

Cited By ~ 11

Author(s):

Wenchun Jiang ◽

Yun Luo ◽

Weiya Zhang ◽

Wanchuck Woo ◽

S. T. Tu

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Creep Strain ◽

Failure Probability ◽

Temperature Fluctuation ◽

Thermal Stresses ◽

Solid Oxide ◽

Effect Of Temperature ◽

Oxide Fuel ◽

Creep Failure

The creep and failure probability of a planar solid oxide fuel cell (SOFC) through a duty cycle is calculated by finite element method (FEM) and Weibull method, respectively. Two sealing methods, namely, rigid seal and bonded compliant seal (BCS), are compared. For the rigid seal, failure is predicted in the glass ceramic because of a failure probability of 1 and maximum creep strain. For the BCS design, the foil can absorb part of thermal stresses in the cell by its own elastoplastic deformation, which considerably decreases failure probability and creep strain in the SOFC. The creep strength of BCS method is achieved by sealing foil with excellent creep properties. Temperature fluctuation during the operating stage leads to the increase in thermal stress and failure probability. In particular, temperature change from low-power to high-power state results in a considerable increase in the creep strain, leading to creep failure for the rigid seal. A failure probability of 1 is generated during start-up and shut-down stages. Therefore, temperature fluctuation should be controlled to ensure structural integrity, and lowering the operating temperature can decrease failure probability and creep failure.

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