Accuracy improvement of T-history method for measuring heat of fusion of various materials

被引：144

作者：

Hong, H ^{[1
]}

Kim, SK

Kim, YS

机构：

[1] Kyung Hee Univ, Sch Mech & Ind Syst Engn, Kyunggi 449701, South Korea

[2] Kyung Hee Univ, Sch Architecture & Civil Engn, Kyunggi 449701, South Korea

[3] Univ Incheon, Dept Architectural Engn, Inchon 402749, South Korea

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2004年 / 27卷 / 04期

关键词：

material; phase change; process; calculation; latent heat; fusion;

D O I：

10.1016/j.ijrefrig.2003.12.006

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

T-history method, developed for measuring heat-of-fusion of phase change material (PCM) in sealed tubes, has the advantages of a simple experimental device and convenience with no sampling process. However, some improper assumptions in the original method, such as using a degree of supercooling as the end of latent heat period and neglecting sensible heat during phase change, can cause significant errors in determining the heat of fusion. This problem has been improved in order to predict better results by us. The present study shows that the modified T-history method is successfully applied to a variety of PCMs such as paraffin and lauric acid having no or a low degree of supercooling. Also it turned out that selected periods for sensible and latent heat do not significantly affect the accuracy of heat-of-fusion. As a result, the method can provide an appropriate means to assess a newly developed PCM by a cycle test even if a very accurate value cannot be obtained. (C) 2004 Published by Elsevier Ltd and IIR.

引用

页码：360 / 366

页数：7