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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.

Journal Article Type Article
Publication Date Apr 30, 2015
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
APA6 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
DOI https://doi.org/10.2514/1.T3911
Keywords Phase change material; Non-deformed; Tablet; Energy storage density
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.nottingh.../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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