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Research on utilization of high-performance heat transport device

Research Project

Project/Area Number 09555069
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Thermal engineering
Research InstitutionThe University of Tokyo

Principal Investigator

NISHIO Shigefumi  The University of Tokyo, Institute of industrial science, Prof., 生産技術研究所, 教授 (00111568)

Co-Investigator(Kenkyū-buntansha) SHIRAKASHI Ryo  The University of Tokyo, Institute of industrial science, Lecturer, 生産技術研究所, 講師 (80292754)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥7,600,000 (Direct Cost: ¥7,600,000)
Fiscal Year 1998: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1997: ¥6,300,000 (Direct Cost: ¥6,300,000)
KeywordsHeat Transport Tube / Dream Pipe / Oscillatory Flow / Heat Pipe / Bubble / Condensation / Evaporation / utilization / 熱工学 / 熱輸送 / 半導体素子 / 振動制御型熱輸送管 / 加振機
Research Abstract

Oscillation-controlled heat transfer device(OC-HTD)is a promising alternative to gravity-driven heat transfer devices or capillary-driven heat transfer devices. When cooling of electronic devices is considered as an application of OC-HTD, two types of HTDs are necessary to be developed, in order to popularize OC-HTD :
(C) Forced oscillation controlled HTD(FOC-HTD), including a compact oscillation inducing mechanism
(D) Self-excited oscillation controlled HTD, with no oscillation inducing mechanism
In this research, these two kinds of HTDs are experimentally manufactured and analyzed, and the following results were obtained.
[3] A phase-shifted oscillation controlled HTD with external miniature motor as oscillation-inducing mechanism, was successfully manufactured and operated. The effective thermal conductivity of this HTD was in good agreement with the result of theoretical analysis, reported earlier. The transient performance of this HTD was experimentally found good.
[4] A bubble driven HTD consisted with 12-turn closed loop was manufactured and operated, and some operating conditions inducing self-excited oscillation was found. By utilizing this self-excited oscillation, the OC-HTD with no mechanism for inducing oscillation can be made. The stability of operation of this HTD was experimentally investigated. With constant tube inner diameter and temperature difference and liquid volume fraction, wider range of stable operating condition could be obtained by using working fluids with shorter capillary length. The possibility of simulating vapor plug propagation phenomenon, by homogeneous flow model, was indicated.
[5] An integrated type of FOC-HTD, with build-in diaphragm actuator was successfully manufactured and operated. The effective thermal conductivity of this HTD was in good agreement with theoretical analysis reported earlier.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (1 results)

All Other

All Publications (1 results)

  • [Publications] 西尾 茂文: "閉ループ式熱輸送管(管径の影響)" 第36回日本伝熱シンポジウム講演論文集. (発売予定). (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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