Investigation of structural influence on the thermal energy storage efficiency in phase change capsules

IF 5.4 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2025-09-19 DOI:10.1016/j.tsep.2025.104122

Jinqiu Yu , Zhenguo Zhang , Guangtong Zhang , Xinjian Liu , Zhonghao Rao

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引用次数: 0

Abstract

The encapsulation of phase change materials using phase change capsules enhances thermal energy storage efficiency and minimizes the risk of leakage, offering significant potential for practical applications. The primary factors influencing the thermal properties of capsules include packaging shape, internal structure, and wall thickness. This study evaluates the thermal performance of capsules with various conventional shapes. Results reveal that the ellipsoidal capsule demonstrates superior thermal energy storage efficiency, with improvements of 32.13 %, 36.24 %, and 39.99 % compared to cubic, cylindrical, and spherical shapes, respectively. To further enhance performance, three bionic encapsulation models inspired by bionics principles were proposed: bionic-mitochondrial, bionic-chloroplast, and bionic-golgi capsules. The thermal energy storage efficiencies of these bionic capsules were enhanced by 55.31 %, 26.78 %, and 133.12 %, respectively. Moreover, the effect of wall thickness on the bionic-golgi capsule was analyzed. While wall thickness had minimal impact on melting time, it significantly influenced both thermal energy storage efficiency and capacity. A decrease in thickness enhanced performance; the 0.5 mm capsule achieved 17.43 J/s, surpassing the 1 mm and 1.5 mm capsules by 18.49 % and 40.64 %, respectively. Corresponding capacities were 731.92 J, 588.31 J, and 471.8 J. This research introduces advanced capsule designs, offering insights for optimizing thermal energy storage systems.

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结构对相变胶囊储热效率影响的研究

采用相变胶囊对相变材料进行封装，提高了储热效率，并将泄漏风险降至最低，具有很大的实际应用潜力。影响胶囊热性能的主要因素包括包装形状、内部结构和壁厚。本研究评估了不同常规形状胶囊的热性能。结果表明，椭球型胶囊的储热效率比立方体、圆柱形和球形胶囊分别提高了32.13%、36.24%和39.99%。为了进一步提高性能，根据仿生学原理提出了三种仿生胶囊模型：仿生线粒体、仿生叶绿体和仿生高尔基胶囊。这些仿生胶囊的储热效率分别提高了55.31%、26.78%和133.12%。此外，还分析了壁厚对仿生高尔基胶囊的影响。虽然壁厚对熔化时间的影响较小，但对储热效率和储热容量均有显著影响。减小厚度增强性能；0.5 mm胶囊的速度为17.43 J/s，分别比1 mm和1.5 mm胶囊高18.49%和40.64%。相应的容量分别为731.92 J、588.31 J和471.8 J。本研究引入了先进的胶囊设计，为优化储热系统提供了见解。

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来源期刊

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

期刊介绍： Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.