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Comparison of Humidified Hydrogen and Partly Pre-Reformed Natural Gas as Fuel for Solid Oxide Fuel Cells applying Computational Fluid Dynamics

Andersson, Martin LU ; Nakajima, Hironori; Kitahara, Tatsumi; Shimizu, Akira; Koshiyama, Takahiro; Paradis, Hedvig LU ; Yuan, Jinliang LU and Sundén, Bengt LU (2014) In International Journal of Heat and Mass Transfer 77. p.1008-1022
Abstract
A three-dimensional computational fluid dynamics (CFD) approach based on the finite element method (FEM) is used to investigate a solid oxide fuel cell (SOFC). Governing equations for heat, gas-phase species, electron, ion and momentum transport are implemented and coupled to kinetics describing electrochemical as well as internal reforming reactions. The model cell design is based on a cell from Ningbo Institute of Material Technology and Engineering in China and the electrochemical area-to-volume ratios are based on experimental work performed at Kyushu University in Japan.



A parameter study is performed focusing on the inlet fuel composition, where humidified hydrogen, 30 % pre-reformed natural gas (as defined by IEA)... (More)
A three-dimensional computational fluid dynamics (CFD) approach based on the finite element method (FEM) is used to investigate a solid oxide fuel cell (SOFC). Governing equations for heat, gas-phase species, electron, ion and momentum transport are implemented and coupled to kinetics describing electrochemical as well as internal reforming reactions. The model cell design is based on a cell from Ningbo Institute of Material Technology and Engineering in China and the electrochemical area-to-volume ratios are based on experimental work performed at Kyushu University in Japan.



A parameter study is performed focusing on the inlet fuel composition, where humidified hydrogen, 30 % pre-reformed natural gas (as defined by IEA) and 50 % pre-reformed natural gas (as defined by Kyushu University) are compared. It is found that when 30 % pre-reformed natural gas is supplied as fuel the air mass flow rate is halved, compared to the case with humidified hydrogen, keeping the inlet and outlet temperatures constant. The current density is decreased but the fuel utilization is kept at 80 %. It is found that the cathode support layer has a significant oxygen gas-phase resistance in the direction normal to the cathode/electrolyte interface (at positions under the interconnect ribs), as well as an electron resistance inside the cathode (at positions under the air channel) in the same direction. The methane steam reforming reaction is shown, both according to the experiments and to the models, to proceed along the main flow direction throughout the cell. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
SOFC, 3D, FEM, modeling, cell scale, internal reforming, methane steam reforming reaction, water-gas shift reaction.
in
International Journal of Heat and Mass Transfer
volume
77
pages
1008 - 1022
publisher
Pergamon
external identifiers
  • wos:000340302400092
  • scopus:84904015949
ISSN
0017-9310
DOI
10.1016/j.ijheatmasstransfer.2014.06.033
language
English
LU publication?
yes
id
99063c11-6a23-45f4-b4ee-b9cdaa8c6ce0 (old id 4522884)
date added to LUP
2014-07-03 16:47:25
date last changed
2017-01-08 03:31:18
@article{99063c11-6a23-45f4-b4ee-b9cdaa8c6ce0,
  abstract     = {A three-dimensional computational fluid dynamics (CFD) approach based on the finite element method (FEM) is used to investigate a solid oxide fuel cell (SOFC). Governing equations for heat, gas-phase species, electron, ion and momentum transport are implemented and coupled to kinetics describing electrochemical as well as internal reforming reactions. The model cell design is based on a cell from Ningbo Institute of Material Technology and Engineering in China and the electrochemical area-to-volume ratios are based on experimental work performed at Kyushu University in Japan.<br/><br>
<br/><br>
A parameter study is performed focusing on the inlet fuel composition, where humidified hydrogen, 30 % pre-reformed natural gas (as defined by IEA) and 50 % pre-reformed natural gas (as defined by Kyushu University) are compared. It is found that when 30 % pre-reformed natural gas is supplied as fuel the air mass flow rate is halved, compared to the case with humidified hydrogen, keeping the inlet and outlet temperatures constant. The current density is decreased but the fuel utilization is kept at 80 %. It is found that the cathode support layer has a significant oxygen gas-phase resistance in the direction normal to the cathode/electrolyte interface (at positions under the interconnect ribs), as well as an electron resistance inside the cathode (at positions under the air channel) in the same direction. The methane steam reforming reaction is shown, both according to the experiments and to the models, to proceed along the main flow direction throughout the cell.},
  author       = {Andersson, Martin and Nakajima, Hironori and Kitahara, Tatsumi and Shimizu, Akira and Koshiyama, Takahiro and Paradis, Hedvig and Yuan, Jinliang and Sundén, Bengt},
  issn         = {0017-9310},
  keyword      = {SOFC,3D,FEM,modeling,cell scale,internal reforming,methane steam reforming reaction,water-gas shift reaction.},
  language     = {eng},
  pages        = {1008--1022},
  publisher    = {Pergamon},
  series       = {International Journal of Heat and Mass Transfer},
  title        = {Comparison of Humidified Hydrogen and Partly Pre-Reformed Natural Gas as Fuel for Solid Oxide Fuel Cells applying Computational Fluid Dynamics},
  url          = {http://dx.doi.org/10.1016/j.ijheatmasstransfer.2014.06.033},
  volume       = {77},
  year         = {2014},
}