A numerical and experimental study of solidification around axially finned heat pipes for high temperature latent heat thermal energy storage units

被引：60
作者：
Khalifa, Abdulmajed [1 ,2 ]
Tan, Lippong [1 ]
Date, Abhijit [1 ]
Akbarzadeh, Aliakbar [1 ]
机构：
[1] RMIT Univ, Sch Aerosp Mech & Mfg Engn, Energy Conservat & Renewable Energy Grp, Bundoora, Vic 3083, Australia
[2] Zawia Univ, Dept Mech & Ind Engn, Zawia, Libya
来源：
APPLIED THERMAL ENGINEERING | 2014年 / 70卷 / 01期
关键词：
Fins; Heat pipes; Phase change material; Thermal storage; Solidification; SOLAR POWER APPLICATIONS; PERFORMANCE ENHANCEMENT; SYSTEM; TUBE; PCM;
D O I：
10.1016/j.applthermaleng.2014.05.080
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A numerical and experimental investigation was conducted on the thermal performance of latent heat thermal energy storage (LHTES) systems which use heat pipes (HPs) for solar thermal power generation. The aim of this study was to quantify the advantages of utilising axially finned HPs rather than bare HPs in LHTES systems. The numerical model uses the effective heat capacity formulation to simulate the solidification process in the phase change material (PCM) and adopts the thermal resistance network approach simulate the heat transfer phenomena through the HPs. The experimental measurements were conducted on a bare heat pipe and on an identical heat pipe with four axial fins. The numerical predictions and the experimental measurements were found to be in good agreement. The benefits of finning the HPs can be seen by considering the enhancement of the rate of energy extraction from the PCM as well as the HP effectiveness. The results have shown the energy extracted increased by 86% and the heat pipes effectiveness increased by 24%. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：609 / 619
页数：11
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