Hybrid Surfaces with Capillary Wick and Minichannels for Enhancement of Phase-Change Immersion Cooling of Power Electronics

IF 1.3 4区工程技术 Q2 ENGINEERING, AEROSPACE

Microgravity Science and Technology Pub Date : 2024-05-09 DOI:10.1007/s12217-024-10117-9

Hongqiang Chen, Wanbo Liu, Yonghai Zhang, Jinjia Wei, Wangfang Du, Zhiqiang Zhu, Bin Li, Shuai Wang

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引用次数: 0

Abstract

The pool boiling heat transfer (phase-change immersion cooling) phenomenon holds significant importance in the energy consumption management of large-power electronics. However, the optimization of surface structure for achieving stable and efficient heat transfer during boiling process remains a significant challenge. Herein, we propose a simplified and direct hybrid surface strategy that combines crossed mini channels and a capillary wick to address the cooling issues faced by high-performance power devices. The copper capillary wick is combined with the crossed mini channel to form a hybrid surface by a simple integrated sintering method. This study investigates the combined effects of different parameters of the capillary wick (average diameter size and powder addition) and minichannels (depth and width) on enhancing the nucleate boiling performance on these hybrid surfaces. The working fluid used in this investigation is HFE-7100. At ΔT_sub = 30 K, the CHF achieved by the hybrid surfaces combining capillary wicks and minichannels can reach 131 W/cm², while the highest HTC is measured at 2.32 W/(cm²·K), both CHF and HTC achieve multiplicative enhancement compared to smooth surfaces. Furthermore, we have developed a CHF prediction model for the hybrid surfaces, which exhibits a prediction error of less than 15%.

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带有毛细管吸芯和微型通道的混合表面，用于增强电力电子器件的相变浸入冷却效果

池沸腾传热（相变浸入冷却）现象在大功率电子设备的能耗管理中具有重要意义。然而，如何优化表面结构以实现沸腾过程中稳定高效的热传递仍然是一个重大挑战。在此，我们提出了一种结合交叉微型通道和毛细管芯的简化而直接的混合表面策略，以解决高性能功率器件所面临的冷却问题。通过一种简单的集成烧结方法，铜毛细管芯与交叉微型通道结合形成了混合表面。本研究探讨了毛细管芯（平均直径尺寸和粉末添加量）和微型通道（深度和宽度）的不同参数对提高这些混合表面的成核沸腾性能的综合影响。本次研究使用的工作流体是 HFE-7100。在 ΔTsub = 30 K 的条件下，毛细管芯和微型通道相结合的混合表面实现的 CHF 达到 131 W/cm2，测得的最高 HTC 为 2.32 W/(cm2-K)，与光滑表面相比，CHF 和 HTC 都实现了成倍的增强。此外，我们还为混合表面开发了一个 CHF 预测模型，其预测误差小于 15%。

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来源期刊

Microgravity Science and Technology 工程技术-工程：宇航

CiteScore

3.50

自引率

44.40%

发文量

期刊介绍： Microgravity Science and Technology – An International Journal for Microgravity and Space Exploration Related Research is a is a peer-reviewed scientific journal concerned with all topics, experimental as well as theoretical, related to research carried out under conditions of altered gravity. Microgravity Science and Technology publishes papers dealing with studies performed on and prepared for platforms that provide real microgravity conditions (such as drop towers, parabolic flights, sounding rockets, reentry capsules and orbiting platforms), and on ground-based facilities aiming to simulate microgravity conditions on earth (such as levitrons, clinostats, random positioning machines, bed rest facilities, and micro-scale or neutral buoyancy facilities) or providing artificial gravity conditions (such as centrifuges). Data from preparatory tests, hardware and instrumentation developments, lessons learnt as well as theoretical gravity-related considerations are welcome. Included science disciplines with gravity-related topics are: − materials science − fluid mechanics − process engineering − physics − chemistry − heat and mass transfer − gravitational biology − radiation biology − exobiology and astrobiology − human physiology