Abstract In this study, the effect of surface areas of heat transfer fins on the melting and solidification process of phase change material in thermal energy storage was investigated. The melting and solidification process of the PCM in the test domain was investigated by experimental and numerical analysis. Non-melting regions in TES were identified and special heat transfer fins were designed to melt these regions. The designed fins were compared with the heat transfer fins which are highly preferred in the literature. The results showed that the surface area of fins has positive effects on heat transfer, but negative effects on natural convection current. The surface area of Fin 1_C extending throughout the TES is 5 times the surface area of Fin 2 designed in the scope of the study. PCM melted with Fin 2 in 64 min, but it melted with Fin 1_C in 60 min. The best melting process in the melting of PCM (Paraffin wax - RT 55) in the TES was provided with Fin 4 design. The melting time has been improved by 65% with the specially designed Fin 4. In all thermal energy storage designed and considered during the solidification process, no significant difference could be obtained. The main reason for this is thought to be the effect of overcooling.

中文翻译：

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PCM熔化凝固传热翅片设计新方法

摘要 在本研究中，研究了传热翅片表面积对热能储存相变材料熔化和凝固过程的影响。通过实验和数值分析研究了测试域中 PCM 的熔化和凝固过程。确定了 TES 中的非熔化区域，并设计了特殊的传热翅片来熔化这些区域。设计的翅片与文献中高度优选的传热翅片进行了比较。结果表明，翅片表面积对传热有积极影响，但对自然对流有消极影响。在整个 TES 中延伸的鳍 1_C 的表面积是研究范围内设计的鳍 2 表面积的 5 倍。PCM 与 Fin 2 在 64 分钟内熔化，但它在 60 分钟内用 Fin 1_C 融化。在 TES 中熔炼 PCM（石蜡 - RT 55）的最佳熔炼工艺提供了 Fin 4 设计。使用专门设计的 Fin 4，熔化时间提高了 65%。在凝固过程中设计和考虑的所有热能存储中，没有获得显着差异。其主要原因被认为是过冷的影响。