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

Khalifa, A, Tan, L, Date, A and Akbarzadeh, A 2014, 'A numerical and experimental study of solidification around axially finned heat pipes for high temperature latent heat thermal energy storage units', Applied Thermal Engineering, vol. 70, no. 1, pp. 609-619.


Document type: Journal Article
Collection: Journal Articles

Title A numerical and experimental study of solidification around axially finned heat pipes for high temperature latent heat thermal energy storage units
Author(s) Khalifa, A
Tan, L
Date, A
Akbarzadeh, A
Year 2014
Journal name Applied Thermal Engineering
Volume number 70
Issue number 1
Start page 609
End page 619
Total pages 11
Publisher Pergamon-Elsevier
Abstract 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%.
Subject Computational Heat Transfer
Keyword(s) Fins
Heat pipes
Phase change material
Solidification
Thermal storage
DOI - identifier 10.1016/j.applthermaleng.2014.05.080
Copyright notice © 2014 Elsevier Ltd. All rights reserved.
ISSN 1359-4311
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