期刊
APPLIED THERMAL ENGINEERING
卷 118, 期 -, 页码 817-825出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2017.02.102
关键词
Sodium acetate trihydrate; Thermal storage materials; Undercooling; Phase stratification; Thermal conductivity
As phase change thermal storage material, sodium acetate trihydrate (SAT) exhibits certain problems such as large undercooling, stratification in phase change, and small thermal conductivity. To overcome these problems, in this study, a new composite phase change thermal storage material was prepared by adding a certain amount of nucleating agent, thickening agent, and high thermal conductivity medium. The research results showed that addition of an appropriate proportion of nucleating agent disodium phosphate dodecahydrate(DSP) and thickening agent carboxymethyl cellulose(CMC) or gelatin led to a good restrain to the undercooling of SAT, while maintaining the heat storage capacity of sample, and avoiding the phenomenon of phase stratification at room temperature cooling. A certain proportion of expanded graphite could also be used in combination with the thermal storage materials, which resulted in relatively small undercooling of the SAT thermal storage materials and a relatively large thermal conductivity. (C) 2017 Elsevier Ltd. All rights reserved.
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