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Materials 2016, 9(1), 59; doi:10.3390/ma9010059

Development of Hollow Steel Ball Macro-Encapsulated PCM for Thermal Energy Storage Concrete

1
Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil Engineering, Shenzhen University, Shenzhen 518060, China
2
School of Architecture and Built Environment, University of Newcastle, Callaghan, NSW 2308, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Luisa F. Cabeza
Received: 7 December 2015 / Revised: 7 January 2016 / Accepted: 13 January 2016 / Published: 19 January 2016
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Abstract

The application of thermal energy storage with phase change materials (PCMs) for energy efficiency of buildings grew rapidly in the last few years. In this research, octadecane paraffin was served as a PCM, and a structural concrete with the function of indoor temperature control was developed by using a macro-encapsulated PCM hollow steel ball (HSB). The macro-encapsulated PCM-HSB was prepared by incorporation of octadecane into HSBs through vacuum impregnation. Test results showed that the maximum percentage of octadecane carried by HSBs was 80.3% by mass. The macro-encapsulated PCM-HSB has a latent heat storage capacity as high as 200.5 J/g. The compressive strength of concrete with macro-encapsulated PCM-HSB at 28 days ranged from 22 to 40 MPa. The indoor thermal performance test revealed that concrete with macro-encapsulated octadecane-HSB was capable of reducing the peak indoor air temperature and the fluctuation of indoor temperature. It can be very effective in transferring the heating and cooling loads away from the peak demand times. View Full-Text
Keywords: phase change materials; hollow steel ball; macro-encapsulated; thermal properties; mechanical properties; structural-functional integrated concrete phase change materials; hollow steel ball; macro-encapsulated; thermal properties; mechanical properties; structural-functional integrated concrete
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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Dong, Z.; Cui, H.; Tang, W.; Chen, D.; Wen, H. Development of Hollow Steel Ball Macro-Encapsulated PCM for Thermal Energy Storage Concrete. Materials 2016, 9, 59.

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