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Heat transfer mechanism in solar thermal energy storage systems using phase change materials

Citation

Seddegh, S and Wang, X and Henderson, AD, Heat transfer mechanism in solar thermal energy storage systems using phase change materials, Proceedings of 5th Annual International Conference on Sustainable Energy and Environmental Science (SEES2016), 22-23 February 2016, Singapore, pp. 1-10. ISSN 2251-189X (2016) [Refereed Conference Paper]


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Copyright 2016 GSTF

DOI: doi:10.5176/2251-189X_SEES16.3

Abstract

The main objective of this research is to study the heat transfer processes and phase change behaviour of a phase change material (PCM) in shell and tube latent heat thermal energy storage (LHTES) systems. The thermal behaviour in a vertical and horizontal shell-and-tube heat energy storage system using using a pure thermal conduction model and a combined conduction-convection heat transfer model is compared in this paper. The model is first validated using published experimental data available in literature and then used to study the temperature variation, solid-liquid interface, phase distribution, total melting and solidification time during melting and solidification processes of PCMs. The simulated results show that the combined convection and conduction model can better describe the energy transfer in PCMs during melting process. In contrast, heat transfer by conduction is more significant during the solidification process since the two models show little difference. Also, it was concluded that during the charging process for the horizontal orientation, convective heat transfer has a strong effect on melting of the upper part of the solid PCM and is less significant during melting of the lower half of the solid PCM. However, in the vertical orientation, convective heat transfer is the same active during the entire charging process. In the solidification process, the thermal behavior does not show any difference between horizontal and vertical systems.

Item Details

Item Type:Refereed Conference Paper
Keywords:latent heat energy storage, phase change material, natural convection, melting, solidification
Research Division:Engineering
Research Group:Mechanical Engineering
Research Field:Energy Generation, Conversion and Storage Engineering
Objective Division:Energy
Objective Group:Energy Storage, Distribution and Supply
Objective Field:Energy Storage (excl. Hydrogen)
Author:Seddegh, S (Mr Saeid Seddegh Kiyaroudi)
Author:Wang, X (Associate Professor Xiaolin Wang)
Author:Henderson, AD (Dr Alan Henderson)
ID Code:108562
Year Published:2016
Deposited By:Engineering
Deposited On:2016-04-22
Last Modified:2017-08-04
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