Article (Scientific journals)
Optimal design and performance investigation of latent heat thermal energy storage system integrated with nonuniformed topology fins
Zhang, Zhaoli; Chen, Xinyu; Zhang, Nan et al.
2025In Journal of Energy Storage, 121, p. 116564
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Keywords :
Latent heat thermal energy storage; Phase transition; Topology optimization; Nonuniform structure; Heat transfer enhancement
Abstract :
[en] The intrinsic low thermal conductivity of PCM restricts performance of phase change systems. Incorporation of metal fins represents an efficacious strategy to remediate the inferior thermal performance. In order to establish more efficient heat transfer, a nonuniform topology-based fin structure fitting for a rounded rectangle shell-tube phase change unit is designed in this paper. This paper investigated the effect of nonuniform tree-like fins on the melting characteristics of phase change units. The topology domain is achieved based on a density-based optimization methodology, with a heat source varying along the vertical direction innovatively. Numerical results reveal that the tree-like fin structure is distributed within the design domain. The varying heat source induces more metal fins placed in the bottom part of the phase change unit. Topology fins are capable of reducing the unmelted “dead zone” appearing in the bottom corners of the no-fin or even-fin phase change unit. The balance between thermal transient conduction and convection reduces the total melting time of PCMs in the topology phase change unit approximately 52.78 % and 23.62 % when compared to the no-fin and even-fin cases. The phase change unit with nonuniformly topologized fins (n = 2) is optimal with fastest melting rate and lowest average temperature of PCM. Fin volume, tube-shell ratio and heat flux are found to have positive effect on phase transition of the phase change unit. The melting rate of phase change unit is significantly accelerated by an increase in fin volume, tube-shell ratio and heat flux. In conclusion, this paper illustrates the heat transfer enhancement of a phase change unit integrated with the nonuniform topology fins, with noticeable benefit to the optimal design of phase change system.
Disciplines :
Energy
Author, co-author :
Zhang, Zhaoli
Chen, Xinyu
Zhang, Nan
Yuan, Yanping
Dzhonova-Atanasova, Daniela
Attia, Shady  ;  Université de Liège - ULiège > Département ArGEnCo > Techniques de construction des bâtiments
Language :
English
Title :
Optimal design and performance investigation of latent heat thermal energy storage system integrated with nonuniformed topology fins
Publication date :
15 June 2025
Journal title :
Journal of Energy Storage
ISSN :
2352-1538
eISSN :
2352-152X
Publisher :
Elsevier, Oxford, United Kingdom
Volume :
121
Pages :
116564
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
11. Sustainable cities and communities
13. Climate action
Available on ORBi :
since 11 April 2025

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