Heat transfer and parametric studies of an encapsulated phase change material based cool thermal energy storage system

被引：34

作者：

Cheralathan M. ^{[1
]}

Velraj R. ^{[2
]}

Renganarayanan S. ^{[2
]}

机构：

[1] School of Mechanical Engineering, S.R.M. Engineering College, SRM University, Kattankulathur

[2] Institute for Energy Studies, Anna University

来源：

Journal of Zhejiang University-SCIENCE A | 2006年 / 7卷 / 11期

关键词：

Cool thermal energy storage (CTES); Energy storage; Freezing; Heat transfer analysis; Phase change materials (PCMs); Refrigeration;

D O I：

10.1631/jzus.2006.A1886

中图分类号：

学科分类号：

摘要：

This work investigates the transient behaviour of a phase change material based cool thermal energy storage (CTES) system comprised of a cylindrical storage tank filled with encapsulated phase change materials (PCMs) in spherical container integrated with an ethylene glycol chiller plant. A simulation program was developed to evaluate the temperature histories of the heat transfer fluid (HTF) and the phase change material at any axial location during the charging period. The results of the model were validated by comparison with experimental results of temperature profiles of HTF and PCM. The model was also used to investigate the effect of porosity, Stanton number, Stefan number and Peclet number on CTES system performance. The results showed that increase in porosity contributes to a higher rate of energy storage. However, for a given geometry and heat transfer coefficient, the mass of PCM charged in the unit decreases as the increase in porosity. The St number as well as the Ste number is also influential in the performance of the unit. The model is a convenient and more suitable method to determine the heat transfer characteristics of CTES system. The results reported are much useful for designing CTES system.

引用

页码：1886 / 1895

页数：9

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