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Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins
Authors
JM Mahdi
HS Majdi
+4 more
HI Mohammed
X Sun
P Talebizadehsardari
W Zixiong
Publication date
1 November 2021
Publisher
'MDPI AG'
Doi
Abstract
Copyright: © 2021 by the authors. This work evaluates the influence of combining twisted fins in a triple-tube heat exchanger utilised for latent heat thermal energy storage (LHTES) in three-dimensional numerical simulation and comparing the outcome with the cases of the straight fins and no fins. The phase change material (PCM) is in the annulus between the inner and the outer tube, these tubes include a cold fluid that flows in the counter current path, to solidify the PCM and release the heat storage energy. The performance of the unit was assessed based on the liquid fraction and temperature profiles as well as solidification and the energy storage rate. This study aims to find suitable and efficient fins number and the optimum values of the Re and the inlet temperature of the heat transfer fluid. The outcomes stated the benefits of using twisted fins related to those cases of straight fins and the no-fins. The impact of multi-twisted fins was also considered to detect their influences on the solidification process. The outcomes reveal that the operation of four twisted fins decreased the solidification time by 12.7% and 22.9% compared with four straight fins and the no-fins cases, respectively. Four twisted fins improved the discharging rate by 12.4% and 22.8% compared with the cases of four straight fins and no-fins, respectively. Besides, by reducing the fins’ number from six to four and two, the solidification time reduces by 11.9% and 25.6%, respectively. The current work shows the impacts of innovative designs of fins in the LHTES to produce novel inventions for commercialisation, besides saving the power grid.Jiangsu Provincial Basic Research Program (Natural Science Fund); Natural Science Research Project of Jiangsu Province Colleges and Universities; Philosophy and Social Science Project of Jiangsu Province Colleges and Universitie
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Last time updated on 15/11/2021