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Planar and tubular solid oxide fuel cells: A comparison of transient process behaviors

Kemm, Miriam LU ; Stiller, Christoph; Selimovic, Azra LU ; Thorud, Bjorn; Torisson, Tord LU and Holland, Olav (2005) 9th International Symposium on Solid Oxide Fuel Cells, SOFC IX In Solid Oxide Fuel Cells: SOFC IX PV 2005-07. p.659-669
Abstract
Two typical configurations of solid oxide fuel cells (SOFCs) are planar cross-flow and tubular counter-flow. Even though their performance is based on the same physical principles, their operation characteristics and parameters vary considerably due to different geometries. The goals of this paper are to detect the particularities of the cell geometries at transient operation and to identify their applicability for stationary power generation. This has been achieved by investigating the thermal and electrochemical performance of a planar and a tubular cell at different operation modes, i.e. load change, start-up, and shut-down. As the most relevant results of the transient SOFC analysis, the comparison of relaxation times and transient... (More)
Two typical configurations of solid oxide fuel cells (SOFCs) are planar cross-flow and tubular counter-flow. Even though their performance is based on the same physical principles, their operation characteristics and parameters vary considerably due to different geometries. The goals of this paper are to detect the particularities of the cell geometries at transient operation and to identify their applicability for stationary power generation. This has been achieved by investigating the thermal and electrochemical performance of a planar and a tubular cell at different operation modes, i.e. load change, start-up, and shut-down. As the most relevant results of the transient SOFC analysis, the comparison of relaxation times and transient temperature gradients within the cell as well as the transients of the power density are presented and discussed. Relaxation times for different processes are shorter for the planar geometry, caused by its compactness. However, due to its longer spatial extension the tubular geometry is more advantageous concerning the level of temperature gradients within the cell. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Power density, Transient temperature, Tubular counter-flow, Tubular cells
in
Solid Oxide Fuel Cells: SOFC IX
volume
PV 2005-07
pages
659 - 669
publisher
Electrochemical Society
conference name
9th International Symposium on Solid Oxide Fuel Cells, SOFC IX
external identifiers
  • Scopus:31744441657
ISBN
1566774659
language
English
LU publication?
yes
id
c86ca793-3eea-4b75-8eea-ee82c0aaffb7 (old id 616056)
date added to LUP
2007-11-25 13:10:10
date last changed
2017-01-01 07:55:06
@inproceedings{c86ca793-3eea-4b75-8eea-ee82c0aaffb7,
  abstract     = {Two typical configurations of solid oxide fuel cells (SOFCs) are planar cross-flow and tubular counter-flow. Even though their performance is based on the same physical principles, their operation characteristics and parameters vary considerably due to different geometries. The goals of this paper are to detect the particularities of the cell geometries at transient operation and to identify their applicability for stationary power generation. This has been achieved by investigating the thermal and electrochemical performance of a planar and a tubular cell at different operation modes, i.e. load change, start-up, and shut-down. As the most relevant results of the transient SOFC analysis, the comparison of relaxation times and transient temperature gradients within the cell as well as the transients of the power density are presented and discussed. Relaxation times for different processes are shorter for the planar geometry, caused by its compactness. However, due to its longer spatial extension the tubular geometry is more advantageous concerning the level of temperature gradients within the cell.},
  author       = {Kemm, Miriam and Stiller, Christoph and Selimovic, Azra and Thorud, Bjorn and Torisson, Tord and Holland, Olav},
  booktitle    = {Solid Oxide Fuel Cells: SOFC IX},
  isbn         = {1566774659},
  keyword      = {Power density,Transient temperature,Tubular counter-flow,Tubular cells},
  language     = {eng},
  pages        = {659--669},
  publisher    = {Electrochemical Society},
  title        = {Planar and tubular solid oxide fuel cells: A comparison of transient process behaviors},
  volume       = {PV 2005-07},
  year         = {2005},
}