Development of granular expanded perlite/paraffin phase change material composites and prevention of leakage

被引：110
作者：
Li, Xiangyu [1 ]
Chen, Huisu [2 ]
Liu, Lin [3 ]
Lu, Zeyu [1 ]
Sanjayan, Jay G. [4 ]
Duan, Wen Hui [5 ]
机构：
[1] Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China
[2] Southeast Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Construct Mat, Nanjing 211189, Jiangsu, Peoples R China
[3] Hohai Univ, Coll Civil & Transportat Engn, Nanjing 210098, Jiangsu, Peoples R China
[4] Swinburne Univ Technol, Ctr Sustainable Infrastruct, Fac Engn & Ind Sci, Mail H38,POB 218, Hawthorn, Vic 3122, Australia
[5] Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia
来源：
SOLAR ENERGY | 2016年 / 137卷
基金：
澳大利亚研究理事会;
关键词：
Phase change material; Expanded perlite; Paraffin; Leakage; Cement; THERMAL-ENERGY STORAGE; PARAFFIN/EXPANDED PERLITE COMPOSITE; PCM LEAKAGE; FORM; BUILDINGS; FABRICATION; STABILITY; BEHAVIOR;
D O I：
10.1016/j.solener.2016.08.012
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
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.
引用
收藏
页码：179 / 188
页数：10
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