Constrained melting heat transfer of composite phase change materials inside spherical container

被引：1
|
作者：
Liu M.-J. [1 ]
Zhu Z.-Q. [1 ]
Xu C.-L. [1 ]
Fan L.-W. [1 ]
Lu H. [1 ,2 ]
Yu Z.-T. [1 ]
机构：
[1] Institute of Thermal Science and Power Systems, Zhejiang University, Hangzhou
[2] Electric Power Research Institute, Yunnan Electric Power and Research Institute (Group), Kunming
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2016年 / 50卷 / 03期
关键词：
Constrained melting heat transfer; Graphite nanoplatelets; Natural convection; Phase change materials; Spherical container;
D O I：
10.3785/j.issn.1008-973X.2016.03.011
中图分类号：
学科分类号：
摘要：
The constrained melting heat transfer of dodecanol-based composite phase change materials (PCM) with addition of graphite nanoplatelets inside a spherical container, as a typical shape, was analyzed quantitatively by experiments in order to examine the influence of highly-conductive fillers on melting heat transfer of composite PCM. By adopting the transient melt fraction by mass during melting as a means for comparison, a parametric study was conducted on the mass fraction of graphite nanoplatelets as well as the isothermal heating boundary condition. Results show that the melting heat transfer of the composite PCM experiences a transition from convection-dominated to conduction-dominated with the mass fraction increasing. And within the studied cases, although the thermal conductivity of the composite PCM is enhanced to some extent, such enhancement is not sufficient to compensate the loss of natural convection due to the increased viscosity but to slow down the melting process. An experimental correlation for the melt fraction was proposed in terms of the characteristic dimensionless groupings, such as the Fourier, Stefan and Grashof numbers, with predictive deviation less than 15%. © 2016, Zhejiang University Press. All right reserved.
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页码：477 / 484
页数：7
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