Thermal analysis of the novel throat-type micro-channel heat sink: Achieving minimal power consumption and maximal thermal performance

IF 2.6 3区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Heat and Fluid Flow Pub Date : 2025-09-20 DOI:10.1016/j.ijheatfluidflow.2025.110077

De-Xin Zhang , Lai-Shun Yang , Xiao Lu

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Abstract

This study numerically investigates, for the first time, the enhanced heat transfer and energy-saving performance of throat-type microchannel heat sinks (TMCSH). Unlike previous works that primarily focused on heat transfer improvement, this research introduces energy conservation efficiency as a new evaluation metric, enabling a joint analysis of thermal and energy-saving characteristics. By comparing with conventional straight-channel structures, the effects of throat opening size, throat length, and throat number on maximum temperature reduction, temperature control efficiency, and energy conservation efficiency are systematically analyzed. The results show that the optimal converging acceleration microchannel (CAM) configuration reduces the maximum temperature by 27 K and lowers energy consumption by 36.4 %. Furthermore, optimal nondimensional design ratios (L_c/D_h = 0.30 and L_t/L_x2 = 0.1) are identified, and multi-throat configurations are shown to further enhance thermal management, achieving up to 80 % energy-saving efficiency. These findings provide new theoretical and practical guidance for designing energy-efficient microchannel heat sinks in high heat flux electronics cooling applications.

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新型喉型微通道散热器的热分析：实现最小功耗和最大热性能

本文首次对喉型微通道散热器（TMCSH）的强化传热和节能性能进行了数值研究。与以往主要关注传热改善的工作不同，本研究引入了节能效率作为一种新的评价指标，实现了热特性和节能特性的联合分析。通过与传统直道结构的比较，系统分析了喉道开口尺寸、喉道长度和喉道个数对最大降温率、控温效率和节能效率的影响。结果表明，优化后的收敛加速微通道（CAM）结构可使最高温度降低27 K，能耗降低36.4%。此外，确定了最佳的无因次设计比（Lc/Dh = 0.30和Lt/Lx2 = 0.1），并显示了多喉道结构进一步加强热管理，实现高达80%的节能效率。这些研究结果为在高热流密度电子器件冷却应用中设计高能效微通道散热器提供了新的理论和实践指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Heat and Fluid Flow 工程技术-工程：机械

CiteScore

5.00

自引率

7.70%

发文量

131

审稿时长

33 days

期刊介绍： The International Journal of Heat and Fluid Flow welcomes high-quality original contributions on experimental, computational, and physical aspects of convective heat transfer and fluid dynamics relevant to engineering or the environment, including multiphase and microscale flows. Papers reporting the application of these disciplines to design and development, with emphasis on new technological fields, are also welcomed. Some of these new fields include microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.