THERMAL SCIENCE

International Scientific Journal

Menglin Yang

,

Fengli Liang

,

Zaixing Wang

,

Junkui Mao

,

Zhenzong He

REDUCING TEMPERATURE DIFFERENCE OF A DIRECT NH3 TUBULAR SOLID OXIDE FUEL CELL TO 1K

ABSTRACT
In this study, a 3-D direct NH3 solid oxide fuel cell was numerically modeled to investigate the effects of NH3 inlet flow velocity, tube structure, and catalyst filling on the internal temperature distribution of the cell. The results show that shortening the length of the NH3 inlet tube and increasing the inlet flow velocity leads to an increase in the temperature difference inside the cell. By perforating the NH3 inlet tube, the temperature difference can be further reduced, and the low temperature zone inside the cell gradually decreases with the perforated area percentage increasing. In addition, placing NH3 decomposition catalyst inside the perforated inlet tube can further improve the temperature difference between the electrodes inside the cell, reducing it from 30 K to about 1 K. Furthermore, the temperature distribution pattern inside the fuel cell with metal supports was investigated, and it was found that the metal support can better export the heat generated inside the fuel cell. This study provides a new idea to improve the temperature distribution of direct NH3 solid oxide fuel cell and enhance the stability and reliability of cell operation.
KEYWORDS
solid oxide fuel cells, Direct ammonia, Three-dimensional numerical simulation, Ammonia inlet tube, Catalytic decomposition
PAPER SUBMITTED: 2023-08-10
PAPER REVISED: 2023-11-28
PAPER ACCEPTED: 2023-12-18
PUBLISHED ONLINE: 2024-03-10
DOI REFERENCE: https://doi.org/10.2298/TSCI230810054Y
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 4, PAGES [3195 - 3208]
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Reducing temperature difference of a direct NH3 tubular solid oxide fuel cell to 1K

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence