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Study of Boiling Refrigerant Transition by Flow Boiling of Immiscible Mixtures

Research Project

Project/Area Number 19K04221
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionUniversity of Hyogo

Principal Investigator

Honda Itsuro  兵庫県立大学, 工学研究科, 教授 (00229254)

Co-Investigator(Kenkyū-buntansha) 河南 治  兵庫県立大学, 工学研究科, 教授 (20382260)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords沸騰 / 熱伝達 / 非共溶性混合媒体 / 流動沸騰 / 伝熱促進 / 非共溶性 / 混合媒体 / 冷媒遷移 / 強制対流沸騰 / 沸騰熱伝達 / 沸騰伝熱 / 非共溶性混合冷媒 / 強制対流
Outline of Research at the Start

様々な冷却対象・冷却条件に対応できる媒体として、高密度低沸点媒体と低密度高沸点媒体を適切な混合割合で組み合わせた非共溶性混合媒体による沸騰冷却が新たに提案され始めている。これは液体混合のみで実現できる画期的な方法で、従来の冷却システムの熱媒体に対する概念を大きく変えるものである。しかし、適切な条件下ではない場合、望むような効果が得られないこともわかっている。本研究では、非共溶性混合媒体を実際の冷却システムを想定した矩形流路内の流動沸騰に対する沸騰冷媒遷移が生じる条件を明らかにする。

Outline of Final Research Achievements

Aiming to dramatically improve the performance from the conventional boiling cooling system, flow boiling experiments using immiscible mixture was conducted. For the test fluid, FC-72 was used as the high-density low-boiling liquid, and water was used as the low-density high-boiling liquid.
As a result, it was found that the boiling refrigerant transition in which the boiling refrigerant is switched on the heat transfer surface basically occurs except when the ratio of the high-density low boiling liquid to the total flow rate is high. It was also found that in the high heat flux region after the transition of the boiling refrigerant, the water became saturated and the critical heat flux was about the same as the saturated boiling of normal water system.

Academic Significance and Societal Importance of the Research Achievements

高い冷却性能が期待できる非共溶性混合媒体を用いた沸騰冷却システムの実用展開のためには、冷媒の組み合わせと液量比を適切に設定することが必須であり、本研究成果による非共溶性混合媒体の流動沸騰熱伝達特性、特に、低熱流束域から中熱流束域において、高密度低沸点媒体から低密度高沸点媒体への沸騰冷媒遷移機構の知見が必須である。

Report

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

    (7 results)

All 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Liquid-liquid interfacial instability model for boiling refrigerant transition by pool boiling of immiscible mixtures2020

    • Author(s)
      Kawanami Osamu、Matsuhiro Kazuki、Hara Yasuhiko、Honda Itsuro、Takagaki Naohisa
    • Journal Title

      International Journal of Heat and Mass Transfer

      Volume: 146 Pages: 118826-118826

    • DOI

      10.1016/j.ijheatmasstransfer.2019.118826

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Characteristics of heat transfer under boiling refrigerant transition by pool boiling of immiscible mixtures (Effects of the height of more-volatile liquid layer)2019

    • Author(s)
      KAWANAMI Osamu、HARA Yasuhiko、TAKAGAKI Naohisa、HONDA Itsuro
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 85 Issue: 879 Pages: 19-00216-19-00216

    • DOI

      10.1299/transjsme.19-00216

    • NAID

      130007751280

    • ISSN
      2187-9761
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 水/FC-72混合媒体による流動沸騰の流体挙動及び熱伝達特性2021

    • Author(s)
      河南 治、高垣 直尚、本田 逸郎、大田 治彦
    • Organizer
      混相流シンポジウム2020
    • Related Report
      2021 Annual Research Report
  • [Presentation] 国際宇宙ステーション沸騰二相流実験における透明伝熱管内壁面温度の導出及び気泡挙動と壁面温度との関連2021

    • Author(s)
      高橋 朋花、池田 直哉、河南 治、浅野 等、今井 良二、井上 浩一、松本 聡、鈴木 康一、大田 治彦
    • Organizer
      日本機械学会熱工学コンファレンス2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Characteristics of Inner-wall Temperature Transition during Flow Boiling in Transparent Heated Tube Section Onboard International Space Station2021

    • Author(s)
      T. TAKAHASHI, N. IKEDA, O. KAWANAMI, K. INOUE, H. ASANO, R. IMAI, S. MATSUMOTO, K. SUZUKI and H. OHTA
    • Organizer
      The 32nd International Symposium on Transport Phenomena
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 国際宇宙ステーション沸騰・二相流実験で得られた透明伝熱管試験部における気泡挙動と壁面温度特性2021

    • Author(s)
      河南 治, 浅野 等, 井上 浩一, 鈴木康一, 今井 良二, 新本 康久, 松本 聡, 大田 治彦
    • Organizer
      日本マイクログラビティ応用学会 第33回学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 矩形流路を用いた非共溶性混合媒体の沸騰熱伝達実験2019

    • Author(s)
      原 靖彦,河南 治,本田 逸郎,高垣 直尚
    • Organizer
      日本混相流学会 混相流シンポジウム2019
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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