• 제목/요약/키워드: Microchannel waterblock

검색결과 7건 처리시간 0.024초

전자기기 냉각용 마이크로채널 워터블록의 냉각성능에 관한 수치해석 (A Numerical Analysis on Cooling Performance of Microchannel Waterblock for Electronic Devices Cooling)

  • 최미진;권오경;차동안;윤재호;이찬
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2007년도 춘계학술대회B
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    • pp.2426-2431
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    • 2007
  • The microchannel waterblock has a good capability in the cooling of electronic devices. The object of this paper is to estiblish the scheme of design for the microchannel waterblock. The effects of flow rate and channel size on the cooling performances are investigated. It was found that the optimum flow rates were ragned from 0.7 lpm to 1.4 lpm. The thermal resistance at 2.0 lpm and 100 W was 0.13 $^{\circ}C$/W. Decrease in the width of channels is more effective for the improvement in the cooling performances of microchannel waterblock than increase in the height of channels. The increase of pressure drop resulted from decrease in the width of channels can be decreased by increasing the hight of channels.

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컴퓨터 CPU 냉각용 미세채널 워터블록의 열성능에 관한 연구 (A Study on Thermal Performance of Microchannel Waterblock for Cooling of CPU in Desktop)

  • 최미진;권오경;차동안;윤재호
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2007년도 동계학술발표대회 논문집
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    • pp.264-269
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    • 2007
  • The microchannel waterblock has a good capability in the cooling of electronic devices. The object of this paper is to study on thermal performance of microchannel water block for cooling of CPU in desktop. The effects of header shape, liquid flow rate, and inlet temperature on the thermal performances of microchannel waterblock are investigated experimentally. Three types of waterblock with different header shape are manufactured from the micro milling and brazing processing. The experiments are conducted using water, over a liquid flow rate ranging from 0.7 to 2.0 LPM and inlet temperature ranging from 20 to $35^{\circ}C$. Waterblocks are attached both horizontally and vertically on the test section to anticipate a performance of waterblock under the actual state in computer. The base temperature and thermal resistance decrease with increasing of liquid flow rate. It was found that the sample #1 was appropriate for the prototype of liquid cooling system.

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전자기기 냉각용 마이크로채널 워터블록의 냉각성능에 관한 실험적 연구 (An Experimental Study on Cooling Performance of Microchannel Waterblock for Electronic Devices Cooling)

  • 권오경;최미진;차동안;윤재호
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2007년도 춘계학술대회B
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    • pp.2432-2437
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    • 2007
  • The demand of high speed and miniaturization of electronic devices results in increased power dissipation requirement for thermal management. In this work, the effects of microchannel width, height and liquid flowrate on the cooling performances of microchannel waterblock are investigated experimentally. The microchannel waterblock considered ranged in width from 0.5 to 0.9 mm, with the channel height being nominally 1.7 to 9 times the width in each case. The experiments were conducted using water, over a liquid flow rate ranging from 0.2 to 2.0 lpm. The base temperature, thermal resistance and pressure drop increase with increasing of liquid flow rate. The measured thermal resistances ranged from 0.10 to 0.23 $^{\circ}C$/W for the channel 5.

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패스변화에 따른 워터블록의 열전달 및 유동특성 평가 (Heat Transfer and Fluid Flow Evaluation of Microchannel Waterblock with Pass Variations)

  • 최진태;권오경;최미진;윤재호;김용찬
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2009년도 하계학술발표대회 논문집
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    • pp.1135-1140
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    • 2009
  • The present study has been studied on a thermal and flow characteristic of the microchannel waterblock with pass variations in 8 samples. Results of a numerical analysis using the CFX-11 were compared with results of an experiment. Numerical analysis and experiment were conducted under an input power of 150 W, inlet temperature of $35^{\circ}C$ and mass flow rates of $0.7{\sim}2.0\;kg/min$. The numerical results showed reasonably good agreement with the experimental results within about $3{\sim}5%$. Also, the numerical results showed that the sample 2 types with the 2 pass gave better performance than the sample 1 types with the 1 pass from the viewpoints of heat transfer and pressure drop.

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미세채널 워터블록의 채널 내 유량분배에 따른 열유동 특성 (Thermal and Flow Characteristic of the Microchannel Waterblock with Flow Distributions)

  • 최미진;권오경;차동안;윤재호
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2008년도 동계학술발표대회 논문집
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    • pp.269-274
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    • 2008
  • The present study has been studied on a thermal and flow characteristic of the microchannel waterblock with flow distributions in each channels. Results of a numerical analysis using the CFX-11 are compared with results of an experiment. Numerical analysis and experiment are conducted under a heat transfer rate of 150W, inlet temperature of $20^{\circ}C$ and mass flow rates of $0.7{\sim}2.0\;kg$/min. Base temperature and pressure drop are investigated with standard deviations of mass flow rates in each channels of samples at 0.7 kg/min.

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미세채널 워터블록의 유입부 형상에 따른 유량분배 및 열유동 특성 (Flow Distribution and Heat Transfer Characteristic of the Microchannel Waterblock with Different Shape of Inlet)

  • 최미진;권오경;윤재호
    • 설비공학논문집
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    • 제21권7호
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    • pp.386-393
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    • 2009
  • The present study has been studied on a thermal and flow characteristic of the microchannel waterblock with flow distributions in each channels. Results of a numerical analysis using the CFX-11 are compared with results of an experiment. Numerical analysis and experiment are conducted under an input power of 150 W, inlet temperature of $20^{\circ}C$ and mass flow rates of $0.7{\sim}2.0$ kg/min. Base temperature and pressure drop are investigated with standard deviations of mass flow rates in each channels of samples. The flow distribution and j/f factor of the sample 4 is increased by about 65.7% and 42.6%, compared to that of the reference model sample 3.