Evaluation of thermal energy dynamics in a compacted high-conductivity phase-change material

Darkwa, Jo and Su, O. and Zhou, T. (2015) Evaluation of thermal energy dynamics in a compacted high-conductivity phase-change material. Journal of Thermophysics and Heat Transfer, 29 (2). pp. 291-296. ISSN 1533-6808

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Abstract

This study evaluates the concept of developing a nondeform phase-change energy storage material possessing higher thermal conductivity and energy storage density through a pressure compaction process. The theoretical and experimental investigations have shown that the technique is able to reduce porosity and increase conductivity and energy storage density of a composite material. Even though there was some measure of plastoelasticity due to decompression, the average porosity was reduced from 62 to 23.8% at a relatively low compaction pressure of 2.8 MPa without any structural damage to the tested sample. The mean energy storage density increased by 97%, and the effective thermal conductivity also increased by 25 times, despite a 10% reduction in its latent heat capacity. There is, however, the need for further development toward minimizing the effect of decompression and achieving stronger energy storage tablets at a relatively low compaction force.

Item Type: Article
Additional Information: Copyright © 2015 by the American Institute of Aeronautics and Astronautics
Keywords: Phase change material; Non-deformed; Tablet; Energy storage density
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Architecture and Built Environment
Identification Number: 10.2514/1.T3911
Depositing User: Eprints, Support
Date Deposited: 24 Oct 2017 07:42
Last Modified: 24 Oct 2017 12:27
URI: http://eprints.nottingham.ac.uk/id/eprint/47493

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