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Experimental investigation of 3D woven Cu lattices for heat exchanger applications

机译:用于热交换器的3D编织铜晶格的实验研究

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摘要

Stochastic metallic foams and periodic porous media have been used extensively in heat transfer applications. A relatively new cellular material, 3D woven Cu lattices, show potential for increased thermal performance, due to their high specific surface areas, high thermal conductivity and regular micro-pore distributions. This work investigates the performance of these lattices in both a "standard" and a topology "optimized" architecture using three flow patterns (axial, focused bifurcated and full bifurcated) and two working coolants (water and air). We characterize and compare three performance metrics: pressure drop, average surface temperature and temperature uniformity for the various lattices, flow patterns, and coolants. The optimized weave shows lower pressure drops but higher average surface temperatures and higher temperature variations compared to the standard weave for all flow patterns and both coolants. The bifurcated flow patterns demonstrate lower pressure drops and lower temperature variations but higher average surface temperatures compared to the axial flow pattern for the two weaves and coolants. We also compare the fluidic and thermal performance of the weaves to other common heat dissipation media using the axial flow pattern and both coolants by plotting friction factors, Nusselt numbers and thermal efficiencies as a function of Reynolds numbers that range from 3 to 125. The standard and optimized weaves exhibit relatively high values in flow resistance and heat transfer, and similar values in thermal efficiency compared to other heat exchangers when using water or air. In addition, the weaves provide excellent temperature uniformity in the bifurcated flow patterns, suggesting they are great candidates for applications requiring both high heat removal and uniform temperature distributions such as the cooling of high power laser diodes.
机译:随机金属泡沫和周期性多孔介质已广泛用于传热应用中。相对较新的蜂窝材料3D编织Cu晶格具有较高的比表面积,高导热率和规则的微孔分布,因此具有提高热性能的潜力。这项工作使用三种流动模式(轴向,聚焦分叉和完全分叉)和两种工作冷却剂(水和空气)在“标准”和拓扑“优化”架构中研究了这些晶格的性能。我们表征和比较三个性能指标:压降,平均表面温度和各种晶格,流动形式和冷却剂的温度均匀性。与所有流型和两种冷却剂的标准编织相比,优化的编织显示出更低的压降,但更高的平均表面温度和更高的温度变化。与两种编织和冷却剂的轴向流态相比,分叉流态表现出较低的压降和较低的温度变化,但平均表面温度较高。我们还通过绘制摩擦系数,努塞尔数和热效率随雷诺数(从3到125)变化的函数,比较了使用轴向流模式和两种冷却剂的织物与其他常见散热介质的流体和热性能。标准与使用水或空气时的其他热交换器相比,优化的编织在流阻和传热方面显示出较高的值,在热效率方面显示出相似的值。此外,编织物在分叉流型中提供了出色的温度均匀性,表明它们是需要高散热和均匀温度分布(例如大功率激光二极管的冷却)的应用的理想选择。

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  • 作者单位

    Johns Hopkins University, Department of Materials Science and Engineering, 3400 N. Charles Street, Maryland Hall 205, Baltimore, MD 21218, USA;

    Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA;

    Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA;

    Department of Civil Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA,Department of Ocean Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-Gu, Busan 606-791, Republic of Korea;

    SAERTEX USA, LLC., Huntersville, NC 28078, USA;

    Department of Civil Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA,Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA;

    Department of Mechanical Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA,Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA;

    Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA,Department of Mechanical Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    3D woven Cu lattices; Heat transfer; Pressure drop; Thermal efficiency; Multi-directional flow; Multi-functionality;

    机译:3D编织铜晶格;传播热量;压力下降;热效率;多向流;多功能性;

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