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In-situ temperature sensing of SOFC during anode reduction and cell operations using a multi-junction thermocouple network

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posted on 2016-01-13, 10:01 authored by Manoj Ranaweera, Jung-Sik Kim
Understanding in-situ temperature distribution of a SOFC stack while in operation is very important for its performance and degradation studies. The available efforts in literature are incapable of measuring the temperature of electrodes. The proposed multi-junction thermocouple network, which requires only 2N thermoelements for N2 measuring points, can measure temperature directly from electrodes. A multi-junction thermocouple network having 9 measuring points was fabricated using K-type thermocouple wires (φ 0.5mm) for an in-situ measurement of the temperature distribution on a cathode (50mmx50mm, NextCell-5). The measurements were performed during an anode reduction process and during a normal cell operation while the air/fuel ratio varies. The gas temperature was measured simultaneously using a commercial K-type thermocouple from 7 mm adjacent to the cathode. The monitored cathode temperature via the in-situ sensors was directly correlated with the cell's OCV whilst the commercial thermocouple 7mm adjacent to the electrode showed a dull change to them.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

ECS Transactions

Volume

68

Issue

1

Pages

2637 - 2644

Citation

RANAWEERA, M.P. and KIM, J.S., 2015. In-situ temperature sensing of SOFC during anode reduction and cell operations using a multi-junction thermocouple network. ECS Transactions, 68 (1), pp.2637-2644

Publisher

© The Electrochemical Society

Version

  • AM (Accepted Manuscript)

Publisher statement

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

Publication date

2015

ISSN

1938-5862

eISSN

1938-6737

Language

  • en

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