Heat Transfer in Completely and Partially Filled Spherical Phase Change Thermal Energy Storage Modules

被引：39
作者：
Rahman, Muhammad Mustafizur [1 ]
机构：
[1] Wichita State Univ, Dept Mech Engn, Wichita, KS 67260 USA
来源：
PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING (ICME 2015) | 2016年 / 1754卷
关键词：
NATURAL-CONVECTION; ENCLOSURE; GRAVITY; REGION;
D O I：
10.1063/1.4958343
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A comprehensive investigation of heat transfer and induced fluid flow interactions during melting in a confined storage medium is reported in this paper. This study focuses on thermal characterization of a single constituent storage module rather than an entire storage system to precisely capture the energy exchange contributions of all fundamental heat transfer mechanisms during phase change process. Two-dimensional, axisymmetric, transient equations for mass, momentum and energy conservation were solved numerically by the finite volume scheme. Results report the influence of the Grashof, Stefan and Prandtl numbers on the melting dynamics of capsules with various diameters (20, 30, 40, and 50 mm). Also the effects of the shell material have been analyzed. Correlating equations for melt fraction and Nusselt number have been developed for possible general design applications.
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页数：12
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