Ultra high performance heat sink using minute-tube-fin array of 100% fin efficiency

超高%20high%20性能%20heat%20sink%20using%20分钟管鳍%20array%20of%20100%%20fin%20效率

基本信息

项目摘要

The increasing power consumption of the CPUs has made the thermal management one of the critical factors in their design. In order to deal with the high power density, the present investigators proposed a new type of heat transport device, called parallel tube heat transport device (PTH) consisting of several capillary tubes and headers on both ends. The objective of this study is to understand the physical phenomena occurring in the PTH and to show its feasibility.In the heat transport experiments, at first, two-dimensional test sections made of copper were used. The working fluid was R-134a, and the tube inner diameter and tube length were 0.51-2mm and 100mm, respectively. The followings were parameters : temperature difference between the headers, header inner diameter, and number of tubes (2-12). The peak effective thermal conductivity (k_<ef>) was larger for the smaller tube diameter, and the maximum value was 200times larger than that of copper. The PTH gave more than 10times larger k_<ef> than that of the meandering closed loop type. Next, the three-dimensional test section was manufactured using 0.51mm inner-diameter tubes, and its thermal resistance was reduced by 80% at most by the effect of the inside working fluid.In the flow visualization experiments, two-dimensional test sections made of glass were used. The working fluids were water and ethanol, and the tube inner diameter and tube number were 1.0-4.4mm and 1-6, respectively. When the tube number was 2-6, the upward and downward convections of both vapor and liquid were observed, which indicated that heat was transported by both sensible and latent heats.In the numerical analysis, one-dimensional compressible gas-liquid two phase flow analysis was performed. The CIP method was adopted, and the liquid plug motion due to the gas pressure difference was reproduced.
CPU功耗的不断增加使得热管理成为其设计中的关键因素之一。为了适应高功率密度的要求,提出了一种新型的传热装置--平行管传热装置(PTH)。本研究的目的是了解发生在PTH的物理现象,并显示其可行性。在热传输实验中,首先,二维测试部分由铜制成。工作介质为R-134 a,管内径为0.51 ~ 2 mm,管长为100 mm。以下是参数:集管之间的温差、集管内径和管数(2-12)。管径越小,峰值有效导热系数<ef>越大,最大值为铜的200倍。PTH的k_(max)<ef>比弯曲闭合回路型的k_(max)大10倍以上。其次,采用内径为0.51mm的圆管制作了三维实验段,在内部工质的作用下,其热阻最多可降低80%。工作介质为水和乙醇,管内径为1.0-4.4mm,管数为1-6根。当管数为2-6时,汽液两相均存在上下对流,表明显热和潜热都参与了传热过程。数值分析中采用一维可压缩气液两相流分析。采用CIP方法,再现了气体压差作用下的液塞运动。

项目成果

期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Characteristics of Parallel Tube Heat Transport Devices with Phase Change
平行管相变传热装置的特点
相変化を利用した並列細管熱輸送デバイスの熱輸送特性
相变平行管传热装置的传热特性
Flow Phenomena in Parallel Tube Heat-Transport Device with Phase Change
相变平行管传热装置中的流动现象
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MOCHIZUKI Sadanari其他文献

MOCHIZUKI Sadanari的其他文献

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{{ truncateString('MOCHIZUKI Sadanari', 18)}}的其他基金

Heat Transport Characteristics and its Mechanism of Heat Transport Device Using Parallel Tubes
平行管传热装置的传热特性及其机理
  • 批准号:
    18360099
  • 财政年份:
    2006
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Gas Exchange Mechanism in Conducting Airways of Human Lung
人肺气道传导的气体交换机制
  • 批准号:
    13450080
  • 财政年份:
    2001
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Local Heat Transfer Measurement in an Internal Cooling Passage of a Gas Turbine Blade and its Direct Numerical Simulation
燃气轮机叶片内冷通道局部传热测量及其直接数值模拟
  • 批准号:
    07455091
  • 财政年份:
    1995
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Development of Cooling Technology by Using a Very Minute Pin-Fin and a Micro-Channel
利用极微小的针翅和微通道的冷却技术的开发
  • 批准号:
    07555384
  • 财政年份:
    1995
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)

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使用结构化表面增强沸腾传热
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    2014
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Advanced boiling heat transfer enhancement and its mechanism using nanofluid and heat transfer surface made by shockwave
利用纳米流体和冲击波制成的传热表面的先进沸腾传热强化及其机理
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    24656142
  • 财政年份:
    2012
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Study on heat exchange with low temperature difference for high heat flux by boiling heat transfer enhancement surface with microstructure
微结构沸腾传热强化面低温差高热流换热研究
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均匀受热管内临界热流密度与强制对流沸腾传热实验研究
  • 批准号:
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  • 财政年份:
    2011
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Experimental study of critical heat flux and forced convection boiling heat transfer enhancement in uniformly heated tubes
均匀受热管内临界热流密度与强制对流沸腾传热实验研究
  • 批准号:
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应用多孔结构沸腾传热强化表面的先进传热设备基础研究
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Experimental study of critical heat flux and forced convection boiling heat transfer enhancement in uniformly heated tubes
均匀受热管内临界热流密度与强制对流沸腾传热实验研究
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A study on improvement of wettability on heating surface and boiling heat transfer enhancement by thermal spray coating
热喷涂改善受热面润湿性及强化沸腾传热的研究
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