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Pore-scale analysis of diffusion transport parameters in digitally reconstructed SOFC anodes with gradient porosity in the main flow direction

Espinoza-Andaluz, M. LU ; Sundén, B. LU and Andersson, M. LU (2017) 15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 In ECS Transactions 78. p.2785-2796
Abstract

One of the promising devices to obtain electrical and thermal energy with considerable high efficiency is the solid oxide fuel cell (SOFC). The electrical energy is the result of the electrochemical reactions that occur inside the fuel cell (FC) when the reactant gases reach the so-called three-phase boundary (TPB). The nonhomogeneous and anisotropic characteristics of the layer between the gas channel and the TPB region require a pore-scale analysis to understand the effect of microstructural configurations. The purpose of this paper is to provide understanding of the behavior of the fluid flow through the digitally reconstructed SOFC anodes, with gradient porosity in the main flow direction, using the lattice Boltzmann method (LBM).... (More)

One of the promising devices to obtain electrical and thermal energy with considerable high efficiency is the solid oxide fuel cell (SOFC). The electrical energy is the result of the electrochemical reactions that occur inside the fuel cell (FC) when the reactant gases reach the so-called three-phase boundary (TPB). The nonhomogeneous and anisotropic characteristics of the layer between the gas channel and the TPB region require a pore-scale analysis to understand the effect of microstructural configurations. The purpose of this paper is to provide understanding of the behavior of the fluid flow through the digitally reconstructed SOFC anodes, with gradient porosity in the main flow direction, using the lattice Boltzmann method (LBM). The impact of the porosity distribution over the fluid behavior is determined for different digitally created SOFC anodes. The SOFC anodes are analyzed keeping the total porosity constant, but varying the local porosity in the flow direction. The impact of a gradient porosity over the gas-phase tortuosity and the normalized effective diffusion coefficient are presented.

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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
ECS Transactions
volume
78
pages
12 pages
publisher
Electrochemical Society Inc.
conference name
15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017
external identifiers
  • scopus:85028472940
DOI
10.1149/07801.2785ecst
language
English
LU publication?
yes
id
25d7f34d-f49c-4901-bc92-793b594877f5
date added to LUP
2017-09-07 14:48:19
date last changed
2017-09-12 10:40:52
@inproceedings{25d7f34d-f49c-4901-bc92-793b594877f5,
  abstract     = {<p>One of the promising devices to obtain electrical and thermal energy with considerable high efficiency is the solid oxide fuel cell (SOFC). The electrical energy is the result of the electrochemical reactions that occur inside the fuel cell (FC) when the reactant gases reach the so-called three-phase boundary (TPB). The nonhomogeneous and anisotropic characteristics of the layer between the gas channel and the TPB region require a pore-scale analysis to understand the effect of microstructural configurations. The purpose of this paper is to provide understanding of the behavior of the fluid flow through the digitally reconstructed SOFC anodes, with gradient porosity in the main flow direction, using the lattice Boltzmann method (LBM). The impact of the porosity distribution over the fluid behavior is determined for different digitally created SOFC anodes. The SOFC anodes are analyzed keeping the total porosity constant, but varying the local porosity in the flow direction. The impact of a gradient porosity over the gas-phase tortuosity and the normalized effective diffusion coefficient are presented.</p>},
  author       = {Espinoza-Andaluz, M. and Sundén, B. and Andersson, M.},
  booktitle    = {ECS Transactions},
  language     = {eng},
  month        = {05},
  pages        = {2785--2796},
  publisher    = {Electrochemical Society Inc.},
  title        = {Pore-scale analysis of diffusion transport parameters in digitally reconstructed SOFC anodes with gradient porosity in the main flow direction},
  url          = {http://dx.doi.org/10.1149/07801.2785ecst},
  volume       = {78},
  year         = {2017},
}