基于多物理场耦合的密封开关柜热管冷却系统数值模拟与优化

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2025-05-08 DOI:10.1016/j.ijthermalsci.2025.109983

Haodong Yu, Pengsen Yang, Hongwang Yao, Haodong Li, Yannan Li, Hanzhong Tao

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引用次数: 0

摘要

建立了一个多物理场耦合的数值模型，研究了强制对流条件下带有三个热管换热器的密封大电流开关柜的热性能。该研究评估了不同气流配置下的温度分布、雷诺数（Re）、努塞尔数（Nu）和传热系数(h)。结果表明，方案IV的热性能最好，最大降温16.82°C，冷却效率提高15%，这主要是由于方案IV形成了强大的内循环，减少了涡流的产生。方案II的局部h值最高，为21.96 W/m2·K，而方案III的单位风机功率热效率最高，质量因子（QF）为2.25。热交换器系统还将故障郁金香触点的温升降低了95.7%，证明了其在缓解局部过热方面的有效性。这项工作为密封电气外壳的对流增强和热优化提供了定量的见解，为先进的热管理设计提供了实用的指导。

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Multi-physics coupling-based numerical simulation and optimization of heat pipe cooling systems for sealed switchgear

A multi-physics coupled numerical model was developed to investigate the thermal performance of sealed high-current switchgear integrated with three heat pipe heat exchangers (HEs) under forced convection. The study evaluates the temperature distribution, Reynolds number (Re), Nusselt number (Nu), and heat transfer coefficient (h) across various airflow configurations. Results show that Scheme IV achieves the best thermal performance, with a maximum temperature drop of 16.82 °C and a 15 % increase in cooling efficiency, attributed to the formation of a strong internal circulation and reduced vortex generation. The highest local h value of 21.96 W/m²·K was obtained in Scheme II, while Scheme III exhibited the highest thermal efficiency per unit fan power, with a quality factor (QF) of 2.25. The heat exchanger system also reduced the temperature rise at faulty tulip contacts by up to 95.7 %, demonstrating its effectiveness in mitigating localized overheating. This work provides quantitative insight into convective enhancement and thermal optimization in sealed electrical enclosures, offering practical guidance for advanced heat management design.

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.