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Control and enhancement of microbubble emission boiling by designing the wettability of a heat transfer surface with a nanostructure

Research Project

Project/Area Number 19K14912
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionTokyo University of Science, Yamaguchi

Principal Investigator

Unno Noriyuki  山陽小野田市立山口東京理科大学, 工学部, 准教授 (70721356)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords沸騰伝熱 / 気泡微細化沸騰 / ナノ構造 / ぬれ性 / サブクールプール沸騰 / 狭隘空間 / 減圧環境 / 冷却技術 / 減圧沸騰 / めっき / 沸騰冷却 / 熱工学
Outline of Research at the Start

次世代電子機器は高性能化・小型化に伴い発熱密度が増加している。高発熱電子機器の故障を防ぐため、冷却性能の高い沸騰冷却技術が注目されている。さらに、通常の沸騰冷却限界を超える高発熱負荷の冷却が可能となる気泡微細化沸騰(MEB)技術がある。実使用環境条件下で安定してMEBを発現させるにはその発生メカニズムを学術的に理解する必要がある。未だ発生メカニズムの詳細は明確でない中、MEBの発生には伝熱面ぬれ性が影響していることが近年明らかになってきた。そこで本研究では、制御されたナノ構造を伝熱面に形成し、表面ぬれ性を任意にデザインすることでMEBと伝熱面ぬれ性との関連性を明らかにする。

Outline of Final Research Achievements

Microbubble emission boiling (MEB) was investigated by changing the wettability of a heat transfer surface. In particular, the wettability of the heat transfer surface was modified by using a nanostructure. For practical use, in addition, the onset of MEB was also studied at a low pressure and confined space condition. As a result, MEB is also observed with the heat transfer surface coated by black chrome plating, which has a nanostructure. Moreover, the experimental result found that the threshold of liquid subcooling at atmospheric pressure for the onset of MEB with the black chrome surface was similar to that with a copper surface. The wettability design of the heat transfer surface was also useful for the onset of MEB at a low pressure and confined space condition.

Academic Significance and Societal Importance of the Research Achievements

現在、高発熱電子機器の熱による故障を防ぐには、大流量水冷ポンプを使った冷却が主流である。しかし、ポンプ消費電力や水資源の浪費が問題視されている。電子機器の冷却に要する資源の無駄遣いを削減し、世界の持続可能な発展を支えるためには、環境に配慮した新規冷却技術の開発が必須である。本研究は、気泡微細化沸騰と呼ばれる次世代電子機器にも対応可能な冷却技術について、その可用性を広げる研究に取り組んだ。学術的意義として、これまであまり着目されていなかった表面ぬれ性と気泡微細化沸騰遷移との関連を実験的に明らかにした。この研究成果は、省エネルギーかつ高性能な次世代電子機器冷却デバイス開発に応用できると考えている。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2022 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 1 results) Presentation (7 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Effects of surface properties on wall superheat at the onset of microbubble emission boiling2022

    • Author(s)
      Unno Noriyuki、Noma Ryotaro、Yuki Kazuhisa、Satake Shin-ichi、Suzuki Koichi
    • Journal Title

      International Journal of Multiphase Flow

      Volume: 155 Pages: 104196-104196

    • DOI

      10.1016/j.ijmultiphaseflow.2022.104196

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Subcooled boiling in a liquid chamber for high heat flux cooling2022

    • Author(s)
      Murabe Kodai、Unno Noriyuki、Yuki Kazuhisa、Suzuki Koichi
    • Journal Title

      Proc. of 2022 International Conference on Electronics Packaging (ICEP2022)

      Volume: - Pages: 101-102

    • DOI

      10.23919/icep55381.2022.9795426

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Low Pressure Subcooled Boiling in a Compact Vessel for Cooling Technology2021

    • Author(s)
      Noriyuki Unno, Kazuhisa Yuki, Risako Kibushi, Koichi Suzuki
    • Journal Title

      Proc. of 2021 International Conference on Electronics Packaging(ICEP2021)

      Volume: ICEP51988.2021.9451924 Pages: 1-2

    • DOI

      10.23919/icep51988.2021.9451924

    • Related Report
      2021 Research-status Report
  • [Journal Article] サブクールプール沸騰中における銅伝熱面性状変化の金属めっき膜による抑制2020

    • Author(s)
      海野 德幸, 結城 和久, 木伏 理沙子, 佐竹 信一, 鈴木 康一
    • Journal Title

      第57回 日本伝熱シンポジウム講演論文集

      Volume: -

    • Related Report
      2020 Research-status Report
  • [Presentation] Subcooled boiling in a liquid chamber for high heat flux cooling2022

    • Author(s)
      Kodai Murabe, Noriyuki Unno, Kazuhisa Yuki, Koichi Suzuki
    • Organizer
      2022 International Conference on Electronics Packaging (ICEP2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 冷却器構造がリキッドチャンバーのサブクール度に及ぼす影響2022

    • Author(s)
      村部 晃大, 海野 德幸, 結城 和久, 鈴木 康一
    • Organizer
      日本機械学会 熱工学コンファレンス2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] 気泡微細化沸騰促進のための表面コーティング技術2022

    • Author(s)
      野間 遼太郎, 海野 德幸, 結城 和久, 佐竹 信一, 鈴木 康一
    • Organizer
      第59回 日本伝熱シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Low Pressure Subcooled Boiling in a Compact Vessel for Cooling Technology2021

    • Author(s)
      Noriyuki Unno, Kazuhisa Yuki, Risako Kibushi, Koichi Suzuki
    • Organizer
      2021 International Conference on Electronics Packaging (ICEP 2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 金属めっき膜上で生じる気泡微細化沸騰の伝熱特性2021

    • Author(s)
      海野德幸, 野間遼太郎, 結城和久, 木伏理紗子, 佐竹信一, 鈴木康一
    • Organizer
      第58回 日本伝熱シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] SUBCOOLED POOL BOILING IN A LIQUID CHAMBER AT LOW PRESSURE2021

    • Author(s)
      Kodai Murabe, Noriyuki Unno, Kazuhisa Yuki and Koichi Suzuki
    • Organizer
      The 32nd International Symposium on Transport Phenomena(ISTP-32)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Microbubble emission boiling with a metal coated surface2021

    • Author(s)
      Ryotaro Noma, Noriyuki Unno, Kazuhisa Yuki, Shin-ichi Satake and Koichi Suzuki
    • Organizer
      The 32nd International Symposium on Transport Phenomena(ISTP-32)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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