Finite element modeling of the glass sealing process for solid oxide cell stacks

Fitzpatrick, James F.; Meinhardt, Kerry D.; Karri, Naveen K.; Koeppel, Brian J.; Bao, Jie; Jin, Tongan; Seymour, Lorraine M.; Royer, Nathan D. J.; Marina, Olga A.

doi:10.1016/j.cej.2024.155452

Title: Finite element modeling of the glass sealing process for solid oxide cell stacks

Journal Article · Mon Sep 02 00:00:00 UTC 2024 · Chemical Engineering Journal

DOI: https://doi.org/10.1016/j.cej.2024.155452 · OSTI ID:2447190

Fitzpatrick, James F. ^[1]; Meinhardt, Kerry D. ^[1];

^[1];

^[1]; Bao, Jie ^[1];

^[1]; Seymour, Lorraine M. ^[1]; Royer, Nathan D. J. ^[1];

^[1]

Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

The sealing process for solid oxide fuel cell (SOFC) and solid oxide electrolysis cell (SOEC) stacks is a vital step in the assembly and manufacturing of these systems. The cell seal and stack seal serve to prevent leakage and the mixing of air with hydrogen and steam during operation. Good seals are critical for reporting accurate cell and stack performance and durability, as leaks can mask degradations and manifest as performance improvement. Predictive modeling of seal materials during sealing processes for SOFC and SOEC stacks has been largely unexplored and could provide design and manufacturing insights for these systems. In this work, finite element modeling was conducted to simulate the assembly and stack sealing of planar cells to capture the densification, viscous flow, and crystallization behavior of the G18 glass ceramic seal material during full scale stack fabrication. The Skorohod-Olevsky viscous sintering material model was implemented in the ANSYS finite element program and modified to account for crystallization effects to simulate the response of the G18 seal material. The effects of initial cell/stack curvature were captured via preliminary stack manufacturing simulations, and its influence on stack sealing quality was studied. Effects of compressive loading sequence and configuration were investigated.

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Hydrogen Fuel Cell Technologies Office (HFTO); USDOE Office of Fossil Energy and Carbon Management (FECM)

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 2447190

Report Number(s):: PNNL-SA--192179

Journal Information:: Chemical Engineering Journal, Journal Name: Chemical Engineering Journal Vol. 498; ISSN 1385-8947

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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25 ENERGY STORAGE
FEA
Finite element analysis (FEA)
Finite element method (FEM)
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crystallization
sintering
solid oxide electrolysis
solid oxide electrolyzer cell
solid oxide fuel cell (SOFC)
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Title: Finite element modeling of the glass sealing process for solid oxide cell stacks

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