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Immersion cooling nucleate boiling of high power computer chips

机译:大功率计算机芯片的浸入式冷却成核沸腾

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This paper presents experimental results of saturation and subcooled boiling of FC-72 and HFE-7100 dielectric liquids on uniformly heated, 10 x 10 mm porous graphite (PC) surfaces for potential applications to immersion cooling of high power computer chips. The experiments investigated the effects of surface inclination, from upward-facing (0°) to downward-facing (180°), and liquid subcooling from 0 to 30 K on nucleate boiling heat transfer coefficient and critical heat flux. The presented experimental data and correlations for natural convection of dielectric liquids on PC and plane surfaces are important for cooling chips while in the standby mode when surface heat flux <20 kW/m~2. The experimental curves of the nucleate boiling heat transfer coefficient for FC-72 dielectric liquid in the upward-facing orientation are used in 3-D thermal analysis for sizing and quantifying the performance of copper (Cu), PC and PG-Cu composite spreaders for removing the dissipated thermal power by an underlying 10×10 mm computer chip with non-uniform heat dissipation. The 2 mm-thick spreaders are cooled by either saturation or 30 K subcooled nucleate boiling of FC-72 and the composite spreader consists of 0.4 mm-thick surface layer of PC and 1.6 mm-thick Cu substrate.
机译:本文介绍了在均匀加热的10 x 10 mm多孔石墨(PC)表面上FC-72和HFE-7100电介质液体的饱和度和过冷沸腾的实验结果,它们可能用于大功率计算机芯片的浸入式冷却。实验研究了表面倾斜度(从向上(0°)到向下(180°)以及从0到30 K的液体过冷)对成核沸腾传热系数和临界热通量的影响。所呈现的实验数据及其在PC和平面表面上的介电液自然对流的相关性对于在待机模式下当表面热通量<20 kW / m〜2时的冷却芯片非常重要。将FC-72电介质液体朝上定向的成核沸腾传热系数的实验曲线用于3-D热分析,用于确定和量化铜(Cu),PC和PG-Cu复合散布器的性能。通过具有不均匀散热功能的底层10×10 mm计算机芯片消除散热功率。通过FC-72的饱和或30 K过冷核沸腾来冷却2 mm厚的摊铺机,复合摊铺机由0.4 mm厚的PC表层和1.6 mm厚的Cu基板组成。

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