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Investigation on optimal shell-to-tube radius ratio of a vertical shell-and-tube latent heat energy storage system

Citation

Shen, G and Wang, X and Chan, A and Cao, F and Yin, X, Investigation on optimal shell-to-tube radius ratio of a vertical shell-and-tube latent heat energy storage system, Solar Energy, 211 pp. 732-743. ISSN 0038-092X (2020) [Refereed Article]

Copyright Statement

Copyright 2020 International Solar Energy Society

DOI: doi:10.1016/j.solener.2020.10.003

Abstract

This study aims to investigate the optimal shell-to-tube radius ratio in a vertical shell-and-tube latent heat thermal energy storage system with phase change material packed in the annulus and heat transfer fluid circulating in the central tube. A conjugate thermodynamic model is developed and validated, and then applied to investigate two series of system configurations: varying the phase change material shell radius at a fixed heat transfer fluid tube radius and varying the heat transfer fluid tube radius at a fixed shell radius. The numerical investigation compares and evaluates energy storage/retrieval density, energy storage/retrieval rate, and total stored/retrieved energy capacity under different shell-to-tube radius ratios. The results show that the thermal behaviour in both series of units is very similar. The optimal radius ratio slightly increases as the total charging/discharging time increases. The unit height has a gentle effect on the optimal radius ratio in the charging process and a negligible influence in the discharging process. By balancing the energy storage/retrieval density, energy storage/retrieval rate, and storage/retrieval capacity in both charging and discharging processes, the optimal shell-to-tube radius ratio is found to be around 5 for both series of configurations at the studied total charging/discharging times.

Item Details

Item Type:Refereed Article
Keywords:latent heat energy storage, shell-and-tube heat exchanger, thermal performance, energy storage density
Research Division:Engineering
Research Group:Mechanical engineering
Research Field:Energy generation, conversion and storage (excl. chemical and electrical)
Objective Division:Energy
Objective Group:Energy storage, distribution and supply
Objective Field:Energy storage (excl. hydrogen and batteries)
UTAS Author:Shen, G (Mr Gang Shen)
UTAS Author:Wang, X (Professor Xiaolin Wang)
UTAS Author:Chan, A (Professor Andrew Chan)
ID Code:141321
Year Published:2020
Web of Science® Times Cited:1
Deposited By:Engineering
Deposited On:2020-10-14
Last Modified:2021-02-17
Downloads:0

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