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Melting-solidification cycle of finned heat storage tank: Optimization of fin structure by response surface method
Institute of the Building Environment & Sustainability Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
Institute of the Building Environment & Sustainability Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
Institute of the Building Environment & Sustainability Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
Institute of the Building Environment & Sustainability Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
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2023 (English)In: Case Studies in Thermal Engineering, E-ISSN 2214-157X, Vol. 52, article id 103759Article in journal (Refereed) Published
Abstract [en]

The impact of the enhanced heat transfer performance of longitudinal fins on the entire process of melting and solidification in a phase change heat storage unit is investigated through experiments and numerical simulations in this paper. The position and structure of the longitudinal fins are optimized by using the response surface method while ensuring that the total volume of the heat storage medium remains unchanged. Studies have identified that some challenging zones in melting and solidification significantly impact the heat transfer of the entire heat storage cycle. Specifically, the challenging zone in melting primarily exists in the lower part of the unit during the charing process, while the challenging zone in solidification is mainly distributed around the unit during the discharging process. Through optimization, the optimized structure (fin spacing is 22.5 mm, fin width is 6.05 mm) can reduce the charging and discharging time by 16.94 % and 45.90 %, respectively. Additionally, the round trip time is significantly reduced by 39.19 %, and the mean heat absorption rate during the melting process is enhanced by 20.28 %. Moreover, the mean heat release rate during solidification is enhanced by 80.23 %.

Place, publisher, year, edition, pages
Elsevier Ltd , 2023. Vol. 52, article id 103759
Keywords [en]
Latent heat energy storage, Melting-solidification process, Optimal design, Temperature response, Fins (heat exchange), Heat storage, Heat transfer, Melting, Structural optimization, Surface properties, Heat storage tanks, Longitudinal fin, Melting and solidification, Optimisations, Response surfaces methods, Solidification process, Solidification
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-65199DOI: 10.1016/j.csite.2023.103759ISI: 001125789800001Scopus ID: 2-s2.0-85179627406OAI: oai:DiVA.org:mdh-65199DiVA, id: diva2:1822119
Available from: 2023-12-21 Created: 2023-12-21 Last updated: 2024-12-06Bibliographically approved

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