THERMAL SCIENCE

International Scientific Journal

COMPARATIVE INVESTIGATION OF PHASE CHANGE MATERIAL ON HEAT TRANSFER CHARACTERISTICS UNDER THEORETICAL AND PRACTICAL PERIODIC TEMPERATURE BOUNDARY

ABSTRACT
In this paper, heat transfer characteristics of phase change material in rectangular containers are numerically analyzed. The inclination angles of the container refer to 0°, 90°, and 180°. Both theoretical and practical periodic temperature boundary conditions are taken into consideration, in which the periodic temperature boundary conditions include 50-80°C and 65-80°C. The comparison study is carried out through the liquid fraction and temperature histories during the heat transfer process under these different boundary conditions. It is indicated that there are large differences between the calculated results under the theoretical and the practical periodic temperature boundary conditions when the temperature boundary is 50-80°C, while the theoretical and the practical periodic temperature boundary conditions of 65-80°C have relatively little effect on the numerical results of the heat transfer process of the phase change material. Furthermore, compared with the temperature increasing stage, the numerical results calculated under the theoretical and the practical boundary conditions have more significant differences in the temperature decreasing stage. The research conclusion of this paper can provide a theoretical basis for the application of phase change material under periodic temperature boundary conditions.
KEYWORDS
PAPER SUBMITTED: 2021-08-25
PAPER REVISED: 2021-11-06
PAPER ACCEPTED: 2021-11-08
PUBLISHED ONLINE: 2022-01-02
DOI REFERENCE: https://doi.org/10.2298/TSCI210825351W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 4, PAGES [3171 - 3186]
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© 2022 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