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Materials 2017, 10(4), 391; doi:10.3390/ma10040391

Design and Preparation of Carbon Based Composite Phase Change Material for Energy Piles

1
College of Civil Engineering, Shenzhen University, Shenzhen 518060, China
2
Department of Civil Engineering, School of Engineering, Nazarbayev University, Astana 010000, Kazakhstan
*
Author to whom correspondence should be addressed.
Academic Editor: Thomas Fiedler
Received: 26 January 2017 / Revised: 21 March 2017 / Accepted: 5 April 2017 / Published: 7 April 2017
(This article belongs to the Section Energy Materials)
View Full-Text   |   Download PDF [6443 KB, uploaded 7 April 2017]   |  

Abstract

Energy piles—A fairly new renewable energy concept—Use a ground heat exchanger (GHE) in the foundation piles to supply heating and cooling loads to the supported building. Applying phase change materials (PCMs) to piles can help in maintaining a stable temperature within the piles and can then influence the axial load acting on the piles. In this study, two kinds of carbon-based composite PCMs (expanded graphite-based PCM and graphite nanoplatelet-based PCM) were prepared by vacuum impregnation for potential application in energy piles. Thereafter, a systematic study was performed and different characterization tests were carried out on two composite PCMs. The composite PCMs retained up to 93.1% of paraffin and were chemically compatible, thermally stable and reliable. The latent heat of the composite PCM was up to 152.8 J/g while the compressive strength of cement paste containing 10 wt % GNP-PCM was found to be 37 MPa. Hence, the developed composite PCM has potential for thermal energy storage applications. View Full-Text
Keywords: composite phase change materials; expanded graphite; graphite nanoplatelet; energy storage; energy piles composite phase change materials; expanded graphite; graphite nanoplatelet; energy storage; energy piles
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yang, H.; Memon, S.A.; Bao, X.; Cui, H.; Li, D. Design and Preparation of Carbon Based Composite Phase Change Material for Energy Piles. Materials 2017, 10, 391.

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