Solidification analysis of a single particle with encapsulated phase change materials

被引：12
|
作者：
Yang, J. [1 ]
Zhao, C. Y. [2 ]
机构：
[1] Univ Warwick, Sch Engn, Coventry CV4 7AL, W Midlands, England
[2] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China
来源：
APPLIED THERMAL ENGINEERING | 2013年 / 51卷 / 1-2期
基金：
英国工程与自然科学研究理事会;
关键词：
Phase change material (PCM); Single particle; Microcapsule; Spherical solidification; Finite difference; DIMENSIONAL STEFAN PROBLEM; FINITE-DIFFERENCE SOLUTION; BOUNDARY-CONDITIONS; SATURATED LIQUID; GALERKIN METHOD; SPHERES; TIME; CYLINDERS;
D O I：
10.1016/j.applthermaleng.2012.09.020
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The melting or solidification behavior of a single particle with encapsulated phase change material (PCM) is essential in analyzing the heat transfer effect of encapsulated PCM suspension slurries, particularly in mini-channels or high flow speed applications. Accordingly, the heat diffusion equation of a sphere with a liquid-solid moving interface model is used to analyze the solidification of PCM within a single encapsulated particle. The nonlinearities associated with a moving boundary problem are simplified via the transformation of dimensionless variables of equations. A technique which combines Explicit Euler method and Implicit Euler method in finite difference scheme is thus developed to solve the Stefan problem. The result is compared with an iterative analytical series solution and a good agreement is obtained. The evolution of solidification and the moving front surface are predicted for different size particles with core paraffin encapsulated, and the solidified volume fraction as a function of time is also determined. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：338 / 346
页数：9
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