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Development of Practical TiO_2 Heat Transfer Surface by Advanced Coating Technique

Research Project

Project/Area Number 17360097
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

TAKATA Yasuyuki  Kyushu University, Faculty of Engineering, Professor, 大学院工学研究院, 教授 (70171444)

Co-Investigator(Kenkyū-buntansha) KOHNO Masamichi  Kyushu University, Faculty of Engineering, Associate Professor, 大学院工学研究院, 助教授 (50311634)
KUBOTA Hiromi  Kyushu University, Faculty of Engineering, Research Associate, 大学院工学研究院, 助手 (10117103)
Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥15,600,000 (Direct Cost: ¥15,600,000)
Fiscal Year 2006: ¥5,400,000 (Direct Cost: ¥5,400,000)
Fiscal Year 2005: ¥10,200,000 (Direct Cost: ¥10,200,000)
KeywordsPhase Change / Titanium Dioxide / Superhydrophilicity / Heat Transfer Enhancement / Heat Exchanger
Research Abstract

Titanium dioxide, one of photocatalysts, has been in spotlight since it has a strong oxidation power to harmful substances with the aid of UV light. In this research project, we tried to develop a practical TiO2 heat transfer surface by making use of flame coating technique. The four kinds of experiments have been performed and the results are summarized as follows.
1) In pool boiling, heat transfer coefficient and critical heat flux for hydrophilic surface become larger than those for normal surface.
2) In falling film evaporation, thin stable water film can be realized on the surface and resultant heat transfer coefficient increased by 40 times as the normal surface at its maximum case.
3) In immersion cooling, hot metal with hydrophilic coating is cooled down more rapidly than normal surface. The time required to cool down is tremendously shorten.
4) In water drop evaporation experiment, life time of water drop on superhydrophilic surface becomes much shorter than that on normal surface especially in lower temperature region. The wetting limit temperature increased for superhydrophilic surface.
Pool boiling experiment using flame coating surface was conducted. For comparison, experiments using sputtered and mirror surfaces were also tested and the following results were obtained.
a) Critical heat flux for flame coating increased by 1.5 times compared with the normal surface. However, heat transfer coefficient at higher heat flux decreased.
b) In higher heat flux region, heat transfer characteristic is much influenced by the thickness of coating layer.
We also conducted experiment of falling film evaporation using flame coating, sputtering and mirror surfaces and found the followings.
a) In lower temperature region, flame coating surface is the best among three surfaces.
b) In higher temperature region, thickness of coating layer and its structure influence the heat transfer characteristics.

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • Research Products

    (22 results)

All 2007 2006 2005

All Journal Article (21 results) Book (1 results)

  • [Journal Article] プラズマ照射による濡れ性改善と相変化伝熱への応用2007

    • Author(s)
      高田 保之
    • Journal Title

      伝熱 46-194

      Pages: 34-39

    • NAID

      10018576059

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] プラズマ照射による漏れ性改善と相変化伝熱への応用2007

    • Author(s)
      高田 保之
    • Journal Title

      伝熱 46-194

      Pages: 34-39

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Enhanced Nucleate Boiling by Superhydrophilic Coating with Checkered and Spotted Patterns2006

    • Author(s)
      Y.Takata, S.Hidaka, M.Kohno
    • Journal Title

      Proceedings of the 6the International Conference on Boiling Heat Transfer (CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Surface Wettability Effects in Heat and Fluid Flow2006

    • Author(s)
      Y.Takata
    • Journal Title

      Proceedings of the 4th International Conference on Nanochannels, Microchannels and Minichannels

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Hydrophilicity of TiO_2 thin films obtained by RF magnetron sputtering deposition2006

    • Author(s)
      X.-T.Zhao, K.Sakka, N.Kihara, Y.Takata, M.Arita, M.Masuda
    • Journal Title

      Current Applied Physics 6-5

      Pages: 931-933

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Boiling Feature on a Super Water-Repellent Surface2006

    • Author(s)
      Y.Takata, S.Hidaka, T.Uraguchi
    • Journal Title

      Heat Transfer Engineering 27-8

      Pages: 25-30

    • NAID

      110002525404

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Effect of Contact Angle on Wetting Limit Temperature2006

    • Author(s)
      S.Hidaka, A.Yamashita, Y.Takata
    • Journal Title

      Heat Transfer -Asian Research 35-7

      Pages: 513-526

    • NAID

      110005051670

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Boiling Feature on a Super Water-Repellent Surface2006

    • Author(s)
      Yasuyuki Takata, Sumitomo Hidaka, Takashi Uraguchi
    • Journal Title

      Heat Transfer Engineering Vol.27,No.8

      Pages: 25-30

    • NAID

      110002525404

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Effect of Contact Angle on Wetting Limit Temperature2006

    • Author(s)
      Sumitomo Hidaka, Akimitsu Yamashita, Yasuyuki Takata
    • Journal Title

      Heat Transfer-Asian Research Vol.35,No.7

      Pages: 513-526

    • NAID

      110005051670

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Hydrophilicity of TiO2 thin films obtained by RF magnetron sputtering deposition2006

    • Author(s)
      Xiu-Tian Zhao, Kenji Sakka, Naoto Kihara, Yasuyuki Takata, Makoto Arita, Masataka Masuda
    • Journal Title

      Current Applied Physics Vol.6,No.5

      Pages: 931-933

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Surface Wettability Effects in Heat and Fluid Flow2006

    • Author(s)
      Y.Takata
    • Journal Title

      Proceedings of the 4th International Conference on Nanochannels, Microchannels and Minichannels Paper No.ICNMM2006-96031

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Enhanced Nucleate Boiling by Superhydrophilic Coating with Checkered and Spotted Patterns2006

    • Author(s)
      Y.Takata, S.Hidaka, M.Kohno
    • Journal Title

      Proceedings of the 6th International Conference on Boiling Heat Transfer

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Hydrophilicity of Tio_2 thin films obtained by RF magnetron sputtering deposition2006

    • Author(s)
      X.-T.Zhao, K.Sakka, N.Kihara, Y.Takata, M.Arita, M.Masuba
    • Journal Title

      Current Applied Physics 6-5

      Pages: 931-933

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Effect of Contact Angle on Wetting Limit Temperature2006

    • Author(s)
      S.Hidaka, A.Yamashita, Y.Takata
    • Journal Title

      Heat Transfer-Asian Research 35-7

      Pages: 513-526

    • NAID

      110005051670

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Boiling from a Super-Water-Repellent Surface, Proceedings of the Fifth International Conference on Enhanced2005

    • Author(s)
      Y.Takata, S.Hidaka, M.Kohno
    • Journal Title

      Compact and Ultra-Compact Heat Exchangers : Science, Engineering and Technology

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Effect of Surface Wettability on Phase Change Phenomena2005

    • Author(s)
      Y.Takata
    • Journal Title

      Proceedings of the HARFKO 2005 International Symposium

      Pages: 3-7

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Boiling Heat Transfer from a Super-Water-Repellent Surface2005

    • Author(s)
      Y.Takata, S.Hidaka, M.Kohno
    • Journal Title

      Proceedings of the 6th World Conference on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Boiling Heat Transfer from a Super-Water-Repellent Surface2005

    • Author(s)
      Y.Takata, S.Hidaka, M.Kohno
    • Journal Title

      Proceeding of the 6th World Conferene on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics (CD-ROM)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 濡れ限界温度に及ぼす接触角の影響2005

    • Author(s)
      日高澄具, 山下秋満, 高田保之
    • Journal Title

      日本機械学会論文集(B) 71-709

      Pages: 2309-2315

    • NAID

      110005051670

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Pool Boiling from a Super-Water-Repellent Surface2005

    • Author(s)
      Y.Takata, S.Hidaka, M.Kohno
    • Journal Title

      Proceedings of the 3rd Korea-Japan Joint Seminar on Heat Transfer : Challenging Researches in Thermal Engineering

      Pages: 65-69

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Boiling from a Super-Water-Repellent Surface2005

    • Author(s)
      Y.Takata, S.Hidaka, M.Kohno
    • Journal Title

      Proc.of the Fifth Int.Conf.on Enhanced, Compact and Ultra-Compact Heat Exchangers : Science, Engi.and Tech. (CD-ROM)

    • Related Report
      2005 Annual Research Report
  • [Book] 光触媒 基礎・材料開発・応用(橋本・大谷・工藤監修)2005

    • Author(s)
      高田 保之(分担執筆)
    • Publisher
      6-4 親水性を利用した相変化伝熱の制御
    • Related Report
      2005 Annual Research Report

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Published: 2005-04-01   Modified: 2016-04-21  

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