Theoretical analysis of convective heat transfer enhancement of microencapsulated phase change material slurries

被引：66

作者：

Zhang, YP ^{[1
]}

Hu, XX ^{[1
]}

Wang, X ^{[1
]}

机构：

[1] Tsing Hua Univ, Inst Heating Ventilating & Airconditioning, Beijing 100084, Peoples R China

来源：

HEAT AND MASS TRANSFER | 2003年 / 40卷 / 1-2期

关键词：

phase change material slurries; microcapsule; heat transfer enhancement;

D O I：

10.1007/s00231-003-0410-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper analyzes the convective heat transfer enhancement mechanism of microencapsulated phase change material slurries based on the analogy between convective heat transfer and thermal conduction with thermal sources. The influence of each factor affecting the heat transfer enhancement for laminar flow in a circular tube with constant wall temperature is analyzed using an effective specific heat capacity model. The model is validated with results available in the literature. The analysis and the results clarify the heat transfer enhancement mechanism and the main factors influencing the heat transfer. In addition, the conventional Nusselt number definition of phase change slurries for internal flow is modified to describe the degree of heat transfer enhancement of microencapsulated phase change material slurries. The modification is also consistent evaluation of the convective heat transfer of internal and external flows.

引用

页码：59 / 66

页数：8