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Title: Using Longitudinal Fins to Improve the Melting Performance of Stearic Acid in Thermal Energy Storage Devices
题目：使用热能储存装置中的纵向翅片提高硬脂酸的熔化性能
Authors: YAN Suying, LIU Yiran, AO Ci, ZHAO Xiaoyan, ZHANG Na, ZHANG Ruiying, AHMADI Mohammad Hossein
作者：闫素英，刘一然，敖慈，赵晓燕，张娜，张瑞英，穆罕默德-侯赛因-艾哈迈迪
单位：内蒙古工业大学能源与动力工程学院,中国科学院工程热物理研究所,中国科学院大学,内蒙古工业大学材料科学与工程学院,沙赫鲁德理工大学机械工程学院
Journal of Thermal Science, 2024, 33(5): 1672-1687.
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摘要
Abstract: The heat transfer efficiency of a thermal energy storage unit (TESU) can be improved by the addition of novel longitudinal fins. A series of TESUs are analyzed using the finite volume method (FVM) to determine the effect of fin angle on the heat transfer performance. As the fin angle increases, the TES rate first increases, then decreases, reaching a maximum rate at 60°, where the melting time is less by 30.9%, 28.58%, 21.99%, 9.02%, and 18.1% than at 0°, 15°, 30°, 45°, and 80°, respectively. In addition, it is found that the melting time of the phase change material is significantly greater at the bottom of the TESU. The time percentage of this stage decreases as the fin angle increases through these percentages by 7%, 14%, 23%, 33%, and 20%, respectively. Further, the response surface methodology (RSM) is applied to optimize the longitudinal fin by minimizing the total melting time. The analysis concludes that a fin angle of 58.68° reduces the complete melting time of the stearic acid by 44% below the time at 0°. These findings fill a gap in knowledge of the effect on melting performance of the design angle of longitudinal fins and provide a reference for the design of horizontally placed longitudinal finned thermal energy storage units.
摘要：通过添加新型纵向翅片，可以提高热能储存装置（TESU）的传热效率。本研究使用有限体积法（FVM）分析了一系列TESU，以确定翅片角度对传热性能的影响。结果表明：随着翅片角度的增大，TESU率先增大后减小，在 60° 时达到最大值，与0°、15°、30°、45°和 80°相比，硬脂酸的熔化时间分别减少了30.9%、28.58%、21.99%、9.02% 和 18.1%。此外，还发现相变材料在TESU底部的熔化时间明显更长。随着翅片角度的增大，这一阶段的时间百分比也随之减小，分别为 7%、14%、23%、33% 和 20%。此外，还采用了响应面方法 (RSM)，通过最小化总熔化时间来优化纵向翅片。分析结果表明：当翅片角度为 58.68°时，硬脂酸的完全熔化时间比0°时缩短了44%。这些发现弥补了纵向翅片设计角度对熔化性能影响的不足，为水平放置纵向翅片热能储存装置的设计提供了参考。
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引用格式
YAN Suying, LIU Yiran, AO Ci, ZHAO Xiaoyan, ZHANG Na, ZHANG Ruiying, AHMADI Mohammad Hossein, Using Longitudinal Fins to Improve the Melting Performance of Stearic Acid in Thermal Energy Storage Devices, Journal of Thermal Science, 2024, 33(5): 1672-1687.
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