Thermal Performance and Dehydration Kinetics of KAl(SO4)2•12H2O as Phase Change Material

被引：9
|
作者：
Dai, Jianfeng [1 ]
Ling, Runqiang [1 ]
Wang, Kezhen [1 ]
机构：
[1] Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China
来源：
MATERIALS PROCESSING TECHNOLOGY, PTS 1-3 | 2012年 / 418-420卷
关键词：
phase change material; Aluminum potassium sulfate dodecahydrate; dehydration kinetics; supercooling; nucleating agent; HEAT-STORAGE MATERIALS; ENERGY-STORAGE; TEMPERATURE;
D O I：
10.4028/www.scientific.net/AMR.418-420.282
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The dehydration kinetics of phase change material KAl(SO4)(2)center dot 12H(2)O was studied under non-isothermal conditions and the Kissinger's method was applied to analyze the TG and DSC data in order to calculation of activation energies and pre-exponential factors for different heating rates. It was concluded that dehydration of KAl(SO4)(2)center dot 12H(2)O occurred in three steps. The activation energies and pre-exponential factors were calculated as 95.9 kJ/mol and 1.95x 10(10)min(-1) for step I, 128.8kJ/mol and 3.67x10(12) min(-1) for step II, 159.6kJ/mol and1.92x10(13)min(-1) for step III, respectively. In addition, various materials have been tested to prevent the KAl(SO4)(2)center dot 12H(2)O supercooling.
引用
收藏
页码：282 / 285
页数：4
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