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Supercooling and heat storage characteristics of phase change emulsion as general purpose heat strorage and transfer medium

Research Project

Project/Area Number 17H07073
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Thermal engineering
Research InstitutionAoyama Gakuin University

Principal Investigator

Morimoto Takashi  青山学院大学, 理工学部, 助手 (30803259)

Project Period (FY) 2017-08-25 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords蓄熱 / 固液相変化 / 過冷却 / 熱伝達 / 凝固 / 凝固熱伝達 / 核生成 / 界面活性剤 / 相変化物質 / エマルション / 潜熱蓄熱 / 相変化 / 熱工学
Outline of Final Research Achievements

In this study, supercooling characteristics and heat transfer characteristics with solidification of dispersoid of a phase change emulsion were studied. Phase change emulsion is a dispersion which is a phase change material is dispersed inside water as fine particle by the action of surfactant. As an experimental result, it was found that the surfactant is important for control of supercooling of the dispersoids inside the emulsion. When the lipophilic group of surfactant is consisted from single bound, solidification of phase change material was promoted. Furthermore, phase change material particles inside phase change emulsion keep supercooling state even though it flows and shear stress is applied to the particles. The heat transfer coefficient of phase change emulsion with solidification of phase change material particles became 1.4 times higher than that of without solidification. The potential of phase change emulsion as heat storage and heat transfer medium was suggested.

Academic Significance and Societal Importance of the Research Achievements

本研究により,微細な粒子状で液中に分散した物質の過冷却という物理現象を明らかにすることができ,更には,その過冷却の抑制手法について提案することができた.さらに,液中に分散した物質が,粒子にせん断応力がかかるような流動場においても,過冷却状態を維持するという新たな知見を得ることができた.過冷却状態を維持することは,蓄熱熱輸送媒体として利用する際には欠点となるが,外的要因により過冷却状態を解除するような仕組みを考案できた場合,必要な時に熱量を取り出すことのできるパッシブなシステムを構築できる可能性がある.

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • Research Products

    (5 results)

All 2019 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Supercooling characteristics of phase change material particles within phase change emulsions2019

    • Author(s)
      Takashi Morimoto, Yusuke Kawana, Kaoru Saegusa, Hiroyuki Kumano
    • Journal Title

      International Journal of Refrigeration

      Volume: 99 Pages: 1-7

    • DOI

      10.1016/j.ijrefrig.2018.11.039

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Solidification heat transfer characteristics of phase change emulsion in turbulent flow region2018

    • Author(s)
      Takashi Morimoto, Kai Suzuki, Hiroyuki Kumano
    • Organizer
      16th International Heat Transfer Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 二重管型熱交換器を用いた相変化エマルションの凝固熱伝達特性の評価2018

    • Author(s)
      鈴木海,森本崇志,熊野寛之
    • Organizer
      第8回潜熱工学シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Study on supercooling characteristics of phase change material particles inside a phase change emulsion2018

    • Author(s)
      Takashi Morimoto, Yusuke Kawana, Hiroyuki Kumano
    • Organizer
      The 9th Asian Conference on Refrigeration and Air-Conditioning
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study on supercooling phenomenon of normal paraffin particles inside a phase change emulsion2017

    • Author(s)
      Takashi Morimoto, Kaoru Saegusa, Masatoshi Midorikawa, Kenichi Togashi, Hiroyuki Kumano
    • Organizer
      5th IIR International Conference on Thermophysical Properties and Transfer Processes of Refrigerants
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research

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Published: 2017-08-25   Modified: 2020-03-30  

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