Investigations on the thermal stability, long-term reliability of LiNO3/KCl - expanded graphite composite as industrial waste heat storage material and its corrosion properties with metals

被引：56

作者：

Huang, Zhaowen ^{[1
]}

Luo, Zigeng ^{[1
]}

Gao, Xuenong ^{[1
]}

Fang, Xiaoming ^{[1
]}

Fang, Yutang ^{[1
]}

Zhang, Zhengguo ^{[1
]}

机构：

[1] South China Univ Technol, Sch Chem & Chem Engn, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ, Guangzhou 510640, Guangdong, Peoples R China

来源：

APPLIED ENERGY | 2017年 / 188卷

基金：

中国国家自然科学基金;

关键词：

Phase change material; Inorganic salt; Thermal stability; Corrosion resistance; PHASE-CHANGE MATERIAL; ENERGY-STORAGE; TRANSPORTATION SYSTEM; LINO3-NANO3-KNO3; SALT; DIFFERENT ATMOSPHERES; CONDUCTIVITY; KNO3/NANO3; RECOVERY; MIXTURE;

D O I：

10.1016/j.apenergy.2016.12.010

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：

The aim of this work was to investigate the properties of LiNO3/KCl-expanded graphite (EG) composite phase change material (PCM) concerning its long-term usage for industrial waste heat storage. Studies on the thermal stability and long-term reliability of this composite PCM as well as its compatibility with metals that commonly used in industries were conducted. By means of thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC), the initial thermal decomposition temperature of the composite PCM was found to be 315 degrees C, and less than 1% and arotind 4% changes in phase change temperature and phase change latent heat, respectively, were obtained after repeated melting/solidification cycles. Gravimetric analysis of different metal specimens after endtring 500 thermal cycles in contact with the composite PCM revealed that stainless steel 304L and carbon steel C20 could be considered as more suitable containment materials than brass H68 for long-term use. The results of this work not only confirmed the great potential of LiNO3/KCl-EG composite PCM to be used as industrial waste heat storage medium, but also could facilitate experimental and numerical researches on the LiNO3/KCl-EG composite PCM-assisted latent heat storage systems in future. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：521 / 528

页数：8

共 26 条

[1] KNO3/NaNO3 - Graphite materials for thermal energy storage at high temperature: Part I. - Elaboration methods and thermal properties [J].