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Cell integrated multi-junction thermocouple array for Solid Oxide Fuel Cell temperature sensing: N+1 architecture

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journal contribution
posted on 13.01.2016, 12:00 by Jung-Sik Kim, Manoj Ranaweera
Understanding the cell temperature distribution of Solid Oxide Fuel Cells (SOFC) stacks during normal operation has multifaceted advantages in performance and degradation studies. Present efforts on measuring temperature from operating SOFC stacks measure only gas channel temperature and do not reveal the cell level temperature distribution, which is more important for understanding cell’s performance and its temperature-related degradation study. Authors propose a cell integrated multi-junction thermocouple array for in-situ cell surface temperature monitoring from an operating SOFC. The proposed thermocouple array requires far fewer numbers of thermo-elements than thermocouples would require for the same number of temperature sensing points. Hence, it causes far less disturbance to the cells’ performance during sensing. The array was sputter deposited on the cathode of a commercial SOFC using alumel (Ni:Al:Mn:Si – 95:2:2:1 by wt.) and chromel( Ni:Cr – 90:10 by wt.) as thermo-element materials. The thermocouple array was tested in a furnace covering the entire operating temperature range of a typical SOFC. Each sensing point of the array could measure temperature independently, and as accurately as a thermocouple. Thus, the concept of multi-junction thermocouples is experimentally validated and its stability on a porous SOFC cathode is confirmed.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Journal of Power Sources

Citation

KIM, J.-S. and RANAWEERA, M.P., 2016. Cell integrated multi-junction thermocouple array for Solid Oxide Fuel Cell temperature sensing: N+1 architecture. Journal of Power Sources, 315, pp. 70-78.

Publisher

© Elsevier

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC-BY 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Publication date

2016

Notes

This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

ISSN

1873-2755

Language

en

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