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Effect of fabrication parameters on capillary performance of composite wicks for two-phase heat transfer devices

机译:制造参数对两相传热装置复合灯芯毛细管性能的影响

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摘要

Advanced thermal management solutions for various applications have promoted the development of composite wicks for two-phase heat transfer devices (TPHTDs). In this study, a number of composite wicks by covering a layer of sintered copper powder on micro V-grooves were developed. A plough-ing-extrusion (P-E) method, as a material-saving fabrication means, was utilized to process the micro V-grooves on copper plate as the base of composite wicks. Using an infrared (1R) thermal imaging method, the capillary rate-of-rise tests with ethanol and acetone were carried out to characterize the capillary performance, which integrates both capillary pressure and permeability. The effects of fabrication parameters, including groove depth and pitch, sintering temperature and time, on the capillary performance of composite wicks were focused on and examined for the purpose of design optimization. Test results show that there is an optimal groove geometry with the groove depth of 0.85 mm and pitch of 0.45 mm to achieve the maximum capillary performance, and sintering processes of 950 ℃ along with 30 min should be chosen. Both working liquid test results exhibit fairly good agreement and demonstrate that the IR thermal imaging provides an accurate means to evaluate the hydraulic properties of composite wicks.
机译:适用于各种应用的先进热管理解决方案促进了两相传热设备(TPHTD)复合芯的发展。在这项研究中,通过在微型V型槽上覆盖一层烧结铜粉,开发了许多复合芯。作为一种节省材料的制造方法,采用犁挤挤压(P-E)方法在作为复合灯芯基础的铜板上加工微型V型槽。使用红外(1R)热成像方法,用乙醇和丙酮进行毛细管上升速率测试,以表征毛细管性能,该性能综合了毛细管压力和渗透率。为了优化设计目的,重点研究了制造参数(包括凹槽深度和间距,烧结温度和时间)对复合灯芯毛细性能的影响。测试结果表明,为了获得最佳的毛细管性能,存在最佳的沟槽几何形状,沟槽深度为0.85 mm,节距为0.45 mm,应选择950℃烧结30分钟。两种工作液体测试结果均显示出良好的一致性,并表明红外热成像提供了一种评估复合芯吸水性能的准确方法。

著录项

  • 来源
    《Energy Conversion & Management》 |2013年第2期|66-76|共11页
  • 作者单位

    Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, School of Mechanical and Automotive Engineering,South China University of Technology, Guangzhou 510640, China;

    Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, School of Mechanical and Automotive Engineering,South China University of Technology, Guangzhou 510640, China,Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA;

    Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, School of Mechanical and Automotive Engineering,South China University of Technology, Guangzhou 510640, China;

    Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, School of Mechanical and Automotive Engineering,South China University of Technology, Guangzhou 510640, China;

    Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, School of Mechanical and Automotive Engineering,South China University of Technology, Guangzhou 510640, China;

  • 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

    two-phase heat transfer devices; heat pipes; composite wick; capillary performance; permeability; capillary rise;

    机译:两相传热装置;热管;复合灯芯毛细管性能渗透性毛细血管上升;

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