The technology of tubular solid oxide fuel cells of cylindrical geometry has advanced enough such that several demonstration units are currently being tested. This paper presents a simple analytical model for the determination of the current density as a function of axial active cell length under idealized conditions. In addition, a current density axial profile under generator conditions obtained from modeling work is used and compared to the simpler approach. The resulting current density axial profiles are then used to design current takeoff in bus bars where the losses in the power leads are minimized. The result is an optimal scenario where bus bars can be considered to be surfaces that do not significantly affect the natural current density of the solid oxide fuel cell.
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May 2008
This article was originally published in
Journal of Fuel Cell Science and Technology
Research Papers
Optimal Design of Current Takeoff in Bus Bars for Tubular Solid Oxide Fuel Cells
Robert Draper
Robert Draper
Siemens Power Generation
, Pittsburgh, PA 15235
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Gianfranco DiGiuseppe
Robert Draper
Siemens Power Generation
, Pittsburgh, PA 15235J. Fuel Cell Sci. Technol. May 2008, 5(2): 021013 (9 pages)
Published Online: April 21, 2008
Article history
Received:
November 22, 2005
Revised:
April 19, 2007
Published:
April 21, 2008
Citation
DiGiuseppe, G., and Draper, R. (April 21, 2008). "Optimal Design of Current Takeoff in Bus Bars for Tubular Solid Oxide Fuel Cells." ASME. J. Fuel Cell Sci. Technol. May 2008; 5(2): 021013. https://doi.org/10.1115/1.2784280
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