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Impact on Diffusion Parameters Computation in Gas Diffusion Layers, Considering the Land/Channel Region, Using the Lattice Boltzmann Method

ESPINOZA ANDALUZ, MAYKEN LU ; Sundén, Bengt LU and Andersson, Martin LU (2016) In ECS Transactions 75(14). p.521-530
Abstract
Diffusion phenomena through the gas diffusion layer (GDL) at the microscale are one of the most complex physical phenomena to be described in proton exchange fuel cell (PEFC) numerical models. Predicting transport parameter behavior in GDLs is a valuable stage to propose micro-architectural designs, which can improve the efficiency and performance of fuel cells (FCs). The purpose of this paper is to propose an expression to estimate parameters involved in the diffusion process such as gas-phase tortuosity and effective diffusion coefficient when the effects of the land/channel region are considered. Three-dimensional GDL approximations are generated considering real characteristics of micro-porous layers employed in FCs. The fluid behavior... (More)
Diffusion phenomena through the gas diffusion layer (GDL) at the microscale are one of the most complex physical phenomena to be described in proton exchange fuel cell (PEFC) numerical models. Predicting transport parameter behavior in GDLs is a valuable stage to propose micro-architectural designs, which can improve the efficiency and performance of fuel cells (FCs). The purpose of this paper is to propose an expression to estimate parameters involved in the diffusion process such as gas-phase tortuosity and effective diffusion coefficient when the effects of the land/channel region are considered. Three-dimensional GDL approximations are generated considering real characteristics of micro-porous layers employed in FCs. The fluid behavior through the porous media is simulated using the Lattice Boltzmann method (LBM), and the mentioned parameters are studied. The incidence of the land/channel presence over the gas-phase tortuosity is determined, and its effects over the effective diffusion are estimated. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
ECS Transactions
volume
75
issue
14
pages
10 pages
publisher
The Electrochemical Society
external identifiers
  • scopus:84991594283
ISSN
1938-6737
DOI
10.1149/07514.0521ecst
language
English
LU publication?
yes
id
76657e4f-aa85-4a98-becc-dde50aff12f8
date added to LUP
2016-10-08 00:52:03
date last changed
2017-09-10 05:10:17
@article{76657e4f-aa85-4a98-becc-dde50aff12f8,
  abstract     = {Diffusion phenomena through the gas diffusion layer (GDL) at the microscale are one of the most complex physical phenomena to be described in proton exchange fuel cell (PEFC) numerical models. Predicting transport parameter behavior in GDLs is a valuable stage to propose micro-architectural designs, which can improve the efficiency and performance of fuel cells (FCs). The purpose of this paper is to propose an expression to estimate parameters involved in the diffusion process such as gas-phase tortuosity and effective diffusion coefficient when the effects of the land/channel region are considered. Three-dimensional GDL approximations are generated considering real characteristics of micro-porous layers employed in FCs. The fluid behavior through the porous media is simulated using the Lattice Boltzmann method (LBM), and the mentioned parameters are studied. The incidence of the land/channel presence over the gas-phase tortuosity is determined, and its effects over the effective diffusion are estimated.},
  author       = {ESPINOZA ANDALUZ, MAYKEN and Sundén, Bengt and Andersson, Martin},
  issn         = {1938-6737},
  language     = {eng},
  month        = {08},
  number       = {14},
  pages        = {521--530},
  publisher    = {The Electrochemical Society},
  series       = {ECS Transactions},
  title        = {Impact on Diffusion Parameters Computation in Gas Diffusion Layers, Considering the Land/Channel Region, Using the Lattice Boltzmann Method},
  url          = {http://dx.doi.org/10.1149/07514.0521ecst},
  volume       = {75},
  year         = {2016},
}