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Heat transfer enhancement of phase change materials by fins under simultaneous charging and discharging

Citation

Joybari, MM and Haghighat, F and Seddegh, S and Al-Abidi, AA, Heat transfer enhancement of phase change materials by fins under simultaneous charging and discharging, Energy Conversion and Management, 152 pp. 136-156. ISSN 0196-8904 (2017) [Refereed Article]

Copyright Statement

© 2017 Elsevier Ltd. All rights reserved.

DOI: doi:10.1016/j.enconman.2017.09.018

Abstract

Due to the inherent intermittency of renewable energy sources such as solar, latent heat thermal energy storagein phase change materials (PCMs) has received considerable attention. Among several techniques to enhance PCMs’ thermal conductivity, the majority of studies have focused on fin integration due to its simplicity, ease of manufacturing, and low cost. In this study, utilization of extended surfaces (by longitudinal fins) was investigated by development of a numerical model to study the performance of a triplex tube heat exchanger (TTHX) equipped with a PCM under simultaneous charging and discharging (SCD). Governing equations were developed and numerically solved using ANSYS Fluent v16.2. Three conventional fin geometries and six developed fin configurations were compared based on the temperature, liquid fraction, and natural convectionbehavior under both SCD and non-SCD conditions. The intensity of natural convection was investigated for different fins for the inside heating/outside cooling scenario based on the solid–liquid interface evolution overtime. The results indicated that since the buoyancy forces induce upward melted PCM motion, the inner hot tube requires fins on its lower half, while the outer cold one should be extended from its upper half. It was concluded that the case with 3 hot tube fins and 1 cold tube fin is most compatible with natural convection and provides the best performance under SCD conditions.

Item Details

Item Type:Refereed Article
Keywords:triplex tube heat exchanger, phase change material, natural convection, simultaneous charging and discharging, heat transfer enhancement, fin
Research Division:Engineering
Research Group:Electrical engineering
Research Field:Electrical energy generation (incl. renewables, excl. photovoltaics)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in engineering
UTAS Author:Seddegh, S (Mr Saeid Seddegh Kiyaroudi)
ID Code:126652
Year Published:2017
Web of Science® Times Cited:42
Deposited By:Engineering
Deposited On:2018-06-20
Last Modified:2018-08-24
Downloads:0

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