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A comparative study of the effect of varying wall heat flux on melting characteristics of phase change material RT44HC in rectangular test cells

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journal contribution
posted on 10.07.2019, 13:33 by Mohamed Fadl, Philip C. Eames
Results of an extensive experimental investigation performed to study the effect of different values of wall heat flux in a rectangular PCM (phase change material) test cell on the melting process are presented. A new experimental system consisting of a rectangular cross-section test cell formed from polycarbonate sheet, copper plates and mica heaters was constructed. During experiments uniform wall heat flux (q″wall = 675, 960 and 1295 W/m2) were applied to both the left and right sides of the test cell. Thermocouples were used to measure the temperature at different locations inside the PCM and on the surface of the copper plates and an infrared camera was used to measure the polycarbonate sheet external surface temperature distribution. The results show the expected strong correlation between the magnitude of wall heat flux and the melt fraction in the PCM as it drives the convective heat transfer. The transparent polycarbonate wall makes it possible to observe the location of the solid/liquid interface and determine melt fractions. The experiments have produced a significant experimental data set for the validation of numerical models simulating the solid/liquid phase change process and PCM melting in geometrical configurations relevant to, for example, latent heat thermal energy storage systems.

Funding

Engineering and Physical Sciences Research Council (EPSRC) through Grant references EP/N021304/1 and EP/K011847/1.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

International Journal of Heat and Mass Transfer

Volume

141

Pages

731 - 747

Citation

FADL, M.S. and EAMES, P.C., 2019. A comparative study of the effect of varying wall heat flux on melting characteristics of phase change material RT44HC in rectangular test cells. International Journal of Heat and Mass Transfer, 141, pp.731-747.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This paper was accepted for publication in the journal International Journal of Heat and Mass Transfer and the definitive published version is available at https://doi.org/10.1016/j.ijheatmasstransfer.2019.07.038.

Acceptance date

05/07/2019

Publication date

2019-07-10

Copyright date

2019

ISSN

0017-9310

Language

en

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