A Numerical Investigation of the Thermal Stresses of a Planar Solid Oxide Fuel Cell
A typical operating temperature of a solid oxide fuel cell (SOFC) is quite high above 750 °C and affects the thermomechanical behavior of the cell. Thermal stresses may cause microstructural instability and sub-critical cracking. Therefore, a joint analysis by the computational fluid dynamics (CFD)...
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doaj-1b78ee62583a4055abaf88a25d9b2c472020-11-24T23:23:09ZengMDPI AGMaterials1996-19442016-09-0191081410.3390/ma9100814ma9100814A Numerical Investigation of the Thermal Stresses of a Planar Solid Oxide Fuel CellPaulina Pianko-Oprych0Tomasz Zinko1Zdzisław Jaworski2Institute of Chemical Engineering and Environmental Protection Processes, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin 71-065, PolandInstitute of Chemical Engineering and Environmental Protection Processes, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin 71-065, PolandInstitute of Chemical Engineering and Environmental Protection Processes, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin 71-065, PolandA typical operating temperature of a solid oxide fuel cell (SOFC) is quite high above 750 °C and affects the thermomechanical behavior of the cell. Thermal stresses may cause microstructural instability and sub-critical cracking. Therefore, a joint analysis by the computational fluid dynamics (CFD) and computational structural mechanics based on the finite element method (FEM) was carried out to analyze thermal stresses in a planar SOFC and to predict potential failure locations in the cell. A full numerical model was based on the coupling of thermo-fluid model with the thermo-mechanical model. Based on a temperature distribution from the thermo-fluid model, stress distribution including the von Mises stress, shear stress as well as the operating principal stress were derived in the thermo-mechanical model. The FEM calculations were performed under different working conditions of the planar SOFC. The highest total stress was noticed at the lower operating voltage of 0.3 V, while the lowest total stress was determined at the voltage of 0.7 V. The obtained stress distributions allowed a better understanding of details of internal processes occurring within the SOFC and provided helpful guidance in the optimization of a new SOFC design.http://www.mdpi.com/1996-1944/9/10/814thermal and residual stressesplanar solid oxide fuel cell (SOFC)computational fluid dynamics (CFD)finite element method (FEM) calculations |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Paulina Pianko-Oprych Tomasz Zinko Zdzisław Jaworski |
spellingShingle |
Paulina Pianko-Oprych Tomasz Zinko Zdzisław Jaworski A Numerical Investigation of the Thermal Stresses of a Planar Solid Oxide Fuel Cell Materials thermal and residual stresses planar solid oxide fuel cell (SOFC) computational fluid dynamics (CFD) finite element method (FEM) calculations |
author_facet |
Paulina Pianko-Oprych Tomasz Zinko Zdzisław Jaworski |
author_sort |
Paulina Pianko-Oprych |
title |
A Numerical Investigation of the Thermal Stresses of a Planar Solid Oxide Fuel Cell |
title_short |
A Numerical Investigation of the Thermal Stresses of a Planar Solid Oxide Fuel Cell |
title_full |
A Numerical Investigation of the Thermal Stresses of a Planar Solid Oxide Fuel Cell |
title_fullStr |
A Numerical Investigation of the Thermal Stresses of a Planar Solid Oxide Fuel Cell |
title_full_unstemmed |
A Numerical Investigation of the Thermal Stresses of a Planar Solid Oxide Fuel Cell |
title_sort |
numerical investigation of the thermal stresses of a planar solid oxide fuel cell |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2016-09-01 |
description |
A typical operating temperature of a solid oxide fuel cell (SOFC) is quite high above 750 °C and affects the thermomechanical behavior of the cell. Thermal stresses may cause microstructural instability and sub-critical cracking. Therefore, a joint analysis by the computational fluid dynamics (CFD) and computational structural mechanics based on the finite element method (FEM) was carried out to analyze thermal stresses in a planar SOFC and to predict potential failure locations in the cell. A full numerical model was based on the coupling of thermo-fluid model with the thermo-mechanical model. Based on a temperature distribution from the thermo-fluid model, stress distribution including the von Mises stress, shear stress as well as the operating principal stress were derived in the thermo-mechanical model. The FEM calculations were performed under different working conditions of the planar SOFC. The highest total stress was noticed at the lower operating voltage of 0.3 V, while the lowest total stress was determined at the voltage of 0.7 V. The obtained stress distributions allowed a better understanding of details of internal processes occurring within the SOFC and provided helpful guidance in the optimization of a new SOFC design. |
topic |
thermal and residual stresses planar solid oxide fuel cell (SOFC) computational fluid dynamics (CFD) finite element method (FEM) calculations |
url |
http://www.mdpi.com/1996-1944/9/10/814 |
work_keys_str_mv |
AT paulinapiankooprych anumericalinvestigationofthethermalstressesofaplanarsolidoxidefuelcell AT tomaszzinko anumericalinvestigationofthethermalstressesofaplanarsolidoxidefuelcell AT zdzisławjaworski anumericalinvestigationofthethermalstressesofaplanarsolidoxidefuelcell AT paulinapiankooprych numericalinvestigationofthethermalstressesofaplanarsolidoxidefuelcell AT tomaszzinko numericalinvestigationofthethermalstressesofaplanarsolidoxidefuelcell AT zdzisławjaworski numericalinvestigationofthethermalstressesofaplanarsolidoxidefuelcell |
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