Thermal Residual Stress and Failure Probability of Functionally Grade Ni-YSZ Anode of Solid Oxide Fuel Cells Using a Finite Element Analysis

2021 ◽  
Vol 103 (1) ◽  
pp. 2217-2231
Author(s):  
Xi Zhang ◽  
Zilin Yan ◽  
Yexin Zhou ◽  
Zheng Zhong
Keyword(s):  
Residual Stress ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Failure Probability ◽  
Functionally Grade ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Element Analysis

scholarly journals Residual Stress Analysis of Cylindrical Solid Oxide Fuel Cells

1997 ◽  
Vol 105 (1228) ◽  
pp. 1057-1061 ◽  
Author(s):  
Tohru KATO ◽  
Akihiko MOMMA ◽  
Susumu NAGATA ◽  
Yasuhiro KASUGA
Keyword(s):  
Residual Stress ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Stress Analysis ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Cylindrical Solid ◽  
Residual Stress Analysis

Leakage Studies With Seals for Solid-Oxide Fuel Cells

2007 ◽  
Author(s):  
Christopher K. Green ◽  
Jeffrey L. Streator ◽  
Comas Haynes ◽  
Edgar Lara-Curzio
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Steel Substrate ◽  
Vertical Direction ◽  
Solid Oxide ◽  
Physical Parameters ◽  
Oxide Fuel ◽  
Element Analysis ◽  
Gas Leakage ◽  
Interfacial Gap

This research seeks to characterize the gas leakage of a mica-based compressive seal assembly in planar solid-oxide fuel cells through modeling and experiment. In particular, it is of interest to assess how certain physical parameters (i.e., seal material composition, compressive applied stress, and surface finish) affect leakage rates. Finite element analysis is used to determine the macroscopic stresses and deformations in the sealing interface, while a microscale contact mechanics analysis is employed to model the role of surface roughness on the mean interfacial gap at the interface. An averaged Reynolds equation from mixed lubrication theory is applied to model the leakage flow across the sealed interface, which is of nanometer to micrometer dimensions in the vertical direction. In conjunction with the mathematical modeling, leakage results are reported. For these tests, an annular Inconel tube was pressed against a stainless steel substrate, creating an annular sealing zone. The inside of the tube is pressurized with a test gas, the mass of which is monitored during the leakage experiment. Test results are compared to model predictions.

Modeling Leakage With Mica-Based Compressive Seals for Solid Oxide Fuel Cells

Tribology ◽  
2006 ◽  
Author(s):  
Christopher K. Green ◽  
Jeffrey L. Streator ◽  
Comas Haynes
Keyword(s):  
Finite Element ◽  
Fuel Cells ◽  
Finite Element Model ◽  
Solid Oxide Fuel Cells ◽  
Element Model ◽  
High Energy ◽  
Solid Oxide ◽  
Physical Parameters ◽  
Oxide Fuel ◽  
Predictive Tool

Fuel cells represent a promising energy alternative to the traditional combustion of fossil fuels. In particular, solid oxide fuel cells (SOFCs) have been of interest due to their high energy densities and potential for stationary power applications. One of the key obstacles precluding the maturation and commercialization of planar SOFCs has been the lack of a robust sealant. This paper presents a computational model of leakage with the utilization of mica-based compressive seals. A finite element model is developed to ascertain the macroscopic stresses and deformations in the interface. In conjunction with the finite element model is a microscale contact mechanics model that accounts for the role of surface roughness in determining the mean interfacial gap at the interface. An averaged Reynolds equation derived from mixed lubrication theory is applied to model the leakage flow across the rough, annular interface. The composite model is applied as a predictive tool for assessing how certain physical parameters (i.e., seal material composition, compressive applied stress, surface finish, and interfacial conformity) affect seal leakage rates.

Sign in / Sign up

Export Citation Format

Share Document