Energy asymmetry in melting and solidifying processes of PCM

被引：43

作者：

Jin, Xing ^{[1
,2
]}

Hu, Huoyan ^{[3
]}

Shi, Xing ^{[1
,2
]}

Zhang, Xiaosong ^{[3
]}

机构：

[1] Southeast Univ, Sch Architecture, Nanjing 210096, Jiangsu, Peoples R China

[2] Southeast Univ, Minist Educ, Key Lab Urban & Architectural Heritage Conservat, Nanjing 210096, Jiangsu, Peoples R China

[3] Southeast Univ, Sch Energy & Environm, Nanjing 210096, Jiangsu, Peoples R China

来源：

ENERGY CONVERSION AND MANAGEMENT | 2015年 / 106卷

关键词：

Phase change material (PCM); Enthalpy; DSC; Thermal analysis; PHASE-CHANGE MATERIALS; OF-THE-ART; THERMAL PERFORMANCE; STORAGE; ENTHALPY; STATE; DSC;

D O I：

10.1016/j.enconman.2015.10.001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The solidifying process of phase change material (PCM) was usually recognized as the exact inverse process of its melting process, especially when building the heat transfer model of PCM. To figure out that whether the melting process and the solidifying process of PCM were symmetrical, several kinds of PCMs were tested by a differential scanning calorimeter (DSC) in this paper. The experimental results showed that no matter using the DSC dynamic measurement method or the DSC step measurement method, the melting process and the solidifying process of PCM were asymmetrical. Because of the energy asymmetry in the melting and solidifying processes of PCM, it was also found that the enthalpy and the state of PCM were not only dependent on its temperature, but also affected by its "previous state". (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：608 / 614

页数：7

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