Growth of the Phase Change Enthalpy Induced by the Crystal Transformation of an Inorganic-Organic Eutectic Mixture of Magnesium Nitrate Hexahydrate-Glutaric Acid

被引：26

作者：

Li, Suimin ^{[1
]}

Lin, Shao ^{[1
]}

Ling, Ziye ^{[1
,2
]}

Fang, Xiaoming ^{[1
,2
]}

Zhang, Zhengguo ^{[1
,2
]}

机构：

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

[2] South China Univ Technol, Guangdong Engn Technol Res Ctr Efficient Heat Sto, Guangzhou 510640, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2020年 / 59卷 / 14期

基金：

中国国家自然科学基金;

关键词：

LATENT-HEAT; EXPERIMENTAL EXPLORATION; THERMAL-PROPERTIES; PORE STRUCTURE; HYDRATE SALT; ENERGY; STORAGE; COMPOSITE; TEMPERATURES; ENHANCEMENT;

D O I：

10.1021/acs.iecr.0c01029

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Developing phase change materials (PCMs) with high latent heat is significant for latent heat storage technolo Herein, an inorganic-organic eutectic mixture PCM of Mg-(NO3)(2)center dot 6H(2)O (MNH) and glutaric acid (GA) exhibited a melting enthalpy of 189.0 J.g(-1), which is higher than that of each raw material. The characterizations of the structure and crystallization behavior revealed that the increase in latent heat was associated with the crystalline transformation of the MNH-GA eutectic. Additionally, the thermal stability of the MNH-GA eutectic was enhanced because the decreased melting temperature of 66.7 degrees C was lower than the dehydration temperature. Compared with expanded graphite (EG), expanded perlite (EP) with a larger pore size is a more suitable supporting material for the MNH-GA eutectic because the small layer gaps within EG hinder the phase transformations of the MNH-GA eutectic. The thermal reliability of MNH-GA/EP could have a high stability, and the latent heat only decreased by 2.3 J.g(-1) after 100 thermal cycles.

引用

页码：6751 / 6760

页数：10