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

Darkwa, Jo; Su, O.; Zhou, T.

Authors

JO DARKWA J.Darkwa@nottingham.ac.uk
Professor of Energy Storage Technologies

O. Su

T. Zhou



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.

Citation

Darkwa, J., Su, O., & Zhou, T. (2015). Evaluation of thermal energy dynamics in a compacted high-conductivity phase-change material. Journal of Thermophysics and Heat Transfer, 29(2), https://doi.org/10.2514/1.T3911

Journal Article Type Article
Acceptance Date Nov 5, 2014
Online Publication Date Jan 28, 2015
Publication Date Apr 30, 2015
Deposit Date Oct 24, 2017
Publicly Available Date Oct 24, 2017
Journal Journal of Thermophysics and Heat Transfer
Print ISSN 0887-8722
Electronic ISSN 1533-6808
Publisher American Institute of Aeronautics and Astronautics
Peer Reviewed Peer Reviewed
Volume 29
Issue 2
DOI https://doi.org/10.2514/1.T3911
Keywords Phase change material; Non-deformed; Tablet; Energy storage density
Public URL http://eprints.nottingham.ac.uk/id/eprint/47493
Publisher URL https://doi.org/10.2514/1.T3911
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf
Additional Information Copyright © 2015 by the American Institute of Aeronautics and Astronautics

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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