期刊
SOLAR ENERGY
卷 137, 期 -, 页码 179-188出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2016.08.012
关键词
Phase change material; Expanded perlite; Paraffin; Leakage; Cement
资金
- Australian Research Council
- National Nature Science Foundation of China [51461135001, 51308187]
- Ministry of Science and Technology of China 973 plan [2015CB655102]
- Natural Science Foundation of Jiangsu Province [BK20130837]
In this study, granular phase change material (PCM) composites were developed by absorbing paraffin into the pores of expanded perlite particles with two grades of particle size. Because of the different particle sizes and pore structures, the absorption mechanisms of the expanded perlite particles were found to differ. A significant amount of paraffin leakage was found when the PCM composites were applied directly into the cement mixture. To prevent such leakage, a new method by using hydrophobic silane was investigated as surface modification for the PCM composites. The method was then compared with nanosilica deposition method. Although both methods prevented leakage effectively, cement composites incorporating silane-modified PCM composites had lower compressive strength than those incorporating nanosilica modified PCM composites. Thermal performances of expanded perlite/paraffin composites were compared with that of microencapsulated PCM and the results showed expanded perlite/paraffin composites were superior under certain conditions. (C) 2016 Elsevier Ltd. All rights reserved.
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