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DEVELOPMENT OF POLTRATION-FREE INSULATING OILS AND UTILIZATION TO ENVIRONMENT FRIENDLY POWER APPARATUS

Research Project

Project/Area Number 18560288
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 電力工学・電気機器工学
Research InstitutionKanazawa Institute of Technology

Principal Investigator

HANAOKA Ryoichi  Kanazawa Institute of Technology, COLLEGE OF ENGINEERING, PROFESSOR (90148148)

Co-Investigator(Kenkyū-buntansha) TAKATA Sinzo  KANAZAWA INSTITUTE OF TECHNOLOGY, COLLEGE OF ENGINEERING, PROFESSOR (70064467)
FUKAMI Tadashi  KANAZAWA INSTITUTE OF TECHNOLOGY, COLLEGE OF ENGINEERING, PROFESSOR (60247434)
Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥2,940,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2006: ¥1,900,000 (Direct Cost: ¥1,900,000)
KeywordsRapeseed ester oil / HFC134a gas / Electrical insulation characteristics / EHD pumping / Liquid jet / Conical cone to rod electrode / Pure conduction pumping mechanism / HFC43-10 / HFCガス / 同軸円錐型電極系 / 変性菜種エステル油 / 変性シリコーン油 / 沿面放電特性 / 標準雷インパルス電圧 / 交流絶縁破壊電圧
Research Abstract

The properties of electrohydrodynamic (EHD) pumping and dielectric strength were examined for two insulating oils, rapeseed ester oil and silicone oil, which were denatured by a bonding of hydrofluorocarbon (HFC134a) gas components decomposed using a barrier discharge reactor. The results obtained from this study are as follows.
1. By taking the difference between spectrums of standard oil and denatured oil using a FT-IR ATR method, it was found that C-F and C-O radicals and C-H and C-O radicals were formed respectively in the denatured rapeseed ester oil and silicone oil.
2. The electrical pumping ability in denatured oils was reinforced significantly compared with standard oils by a slight addition of ionic components. In the electrode geometry (quasi-doughnut to plane type) used in the experiment, the current level was less than 1 μA for the applied voltage up to 20 kV. The potential distribution measured at parallel plane electrodes in denatured oils also showed that there existed a … More heterocharge layer near the electrodes, which suggested that the powerful pumping was attributable to the pure conduction pumping mechanism.
3. Impulse creeping discharges were affected sensitively by the ionic component in denatured oils. In denatured oils, the streamer propagated longer compared to standard oils, but the lengths of positive streamer did not exceed±15% of those in standard transformer oil. The ac breakdown voltage in denatured oils also reduced compared to those of standard oils. The dielectric strength of denatured rapeseed ester oil, however, was comparable to that of standard transformer oil.
On the other hand, the coaxial cone to rod electrode assembly was devised newly and the properties of the liquid jet were experimentally examined. When a positive dc voltage was applied to the rod electrode, the liquid spouted forcibly from the glass tube outlet installed in the top of grounded conical electrode. This EHD pumping comes from the accumulation of ionic charges in the vicinity of rod electrode. It is also shown that a partial insulator coating of rod electrode surface leads to a rising of the pumping pressure and a reduction of the conduction current. An EHD pumping is expected largely as a new cooling technique in the oil-filled power apparatus, but there is need to take into consideration a reciprocal relation between the EHD mechanism and the electrical insulation. Less

Report

(3 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • Research Products

    (29 results)

All 2007 2006

All Journal Article (12 results) (of which Peer Reviewed: 4 results) Presentation (13 results) Book (2 results) Patent(Industrial Property Rights) (2 results)

  • [Journal Article] EHD液体ジェット発生用の実用的電極系と液体ポンピング特性2007

    • Author(s)
      花岡 良一, 細谷 直樹, 高橋 尉治朗, 高田 新三, 深見 正
    • Journal Title

      電気学会論文誌A Vol.127,No.12

      Pages: 769-776

    • NAID

      10019978613

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Practical Electrical System for EHD Liquid Jet Generation and Properties of Liquid Pumping.2007

    • Author(s)
      R. Hanaoka, N. Hosodani, I, Takahashi, S. Takata, T. Fukami
    • Journal Title

      Trans. IEE of Japan Vol.127, No.12

      Pages: 769-776

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] EHD液体ジェット発生用の実用的電極系と液体ポンピング特性2007

    • Author(s)
      花岡良一、細谷直樹、高橋尉治朗、高田新三、深見正
    • Journal Title

      電気学会論文誌A VOL.127,No.12

      Pages: 769-776

    • NAID

      10019978613

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impulse Creeping Discharge Characteristics in Insulating Oils with EHD Function Reinforced by Addid HFC Gas Components2006

    • Author(s)
      R.Hanaoka, H.Nakamichi, S.Takata, H.Koide and Y.Hatta
    • Journal Title

      IEEE Trans.Dielectrics and Electrical Insulation Vol.13,No.3

      Pages: 526-531

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Distinctive Flow Properties of Liquid Jet Generated by EHD Pump and Conical Nozzle2006

    • Author(s)
      R.Hanaoka, H.Nakamichi, S.Takata and T.Fukami
    • Journal Title

      Electrical Engineering in Japan Vol.154,No.1

      Pages: 9-19

    • NAID

      10012885493

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Impulse Creeping Discharge Characteristics in Insulating Oils with EHD Function Reinforced by Added HFC Gas Components.2006

    • Author(s)
      R. Hanaoka, H. Nakamichi, S. Takata, H. Koide, Y. Hatta
    • Journal Title

      IEEE Trans. Dielectrics and Electrical Insulation Vol.13, No.3

      Pages: 526-531

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Distinctive Flow Properties of Liquid Jet Generated by EHD Pump and Conical Nozzle.2006

    • Author(s)
      R. Hanaoka, H. Nakamichi, S. Takata, T. Fukami
    • Journal Title

      Electrical Engineering in Japan Vol.154, No.1

      Pages: 9-19

    • NAID

      10012885493

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Impulse Creeping Discharge characteristics in Insulating Oils EHD Function Reinforced by Added HFC Gas Components2006

    • Author(s)
      R.Hanaoka, H.Nakamichi, S.Takata, H.Koide, Y.Hatta
    • Journal Title

      IEEE Trans. Dielectries and Electrical Insulation Vol. 13・No. 3

      Pages: 526-531

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Influence of Applied Voltage Waveform on Impulse Creeping Discharges in Rapeseeds Ester Oil2006

    • Author(s)
      R.Hanaoka, H.Ishino, S.Takata, H.Yamamoto, Y.Nakagami
    • Journal Title

      Book of Abstract- 6th International Conference On Electric Charges In Non-Conductive Materials(CSC-6), Tour(France)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Properties of EHD Liquid Jet caused by Coaxial Cone to Rod Electrode2006

    • Author(s)
      R.Hanoka, N.Hosodani, N.Nakamichi, S.Takata, T.Fukami
    • Journal Title

      Proceedings of the 2006 International Symposium on Electrohydrodynamics(2006 ISEHD), Buenos Aires, Argentine

      Pages: 277-280

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 同軸円錐型電極によるEHD液体ジェットの特性2006

    • Author(s)
      細谷直輝, 花岡良一, 高田新三, 深見 正
    • Journal Title

      平成18年電気学会基礎・材料・共通部門大会 講演論文集

      Pages: 475-475

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 同軸円錐型電極の角度によるEHD液体ジェットの特性の相違2006

    • Author(s)
      高橋尉治朗, 細谷直輝, 花岡良一, 高田新三, 深見 正
    • Journal Title

      平成18年電気関係学会北陸支部連合大会 講演論文集

    • Related Report
      2006 Annual Research Report
  • [Presentation] 同軸円錐型電極によるEHDポンピング特性の経時変化2007

    • Author(s)
      高橋 尉治朗, 花岡 良一, 高田 新三, 深見 正
    • Organizer
      平成19年電気学会基礎・材料・共通部門大会
    • Place of Presentation
      大阪
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Temporal Change on Properties of EHD Pumping Caused by Coaxial Cone to Rod Electrode2007

    • Author(s)
      I. Takahashi, R. Hanaoka, S. Takata, T. Fukami
    • Organizer
      2007 Annual Conference Fundamentals and Materials Society LEE Japan
    • Place of Presentation
      Osaka
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 同軸円錐型電極によるEHDポンピング特性の経時変化2007

    • Author(s)
      高橋尉治朗、花岡良一、高田新三、深見正
    • Organizer
      平成19年電気学会基礎・材料・共通部門大会予稿集
    • Place of Presentation
      日本(大阪)
    • Related Report
      2007 Annual Research Report
  • [Presentation] 同軸円錐型電極によって生じるEHD液体ジェットの流動特性2006

    • Author(s)
      細谷 直輝, 中道 裕之, 花岡 良一, 高田 新三, 深見 正
    • Organizer
      平成18年度電気学会全国大会講演概要集[7]
    • Place of Presentation
      横浜
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Influence of Applied Voltage Waveform on Impulse Creeping Discharges in Rapeseed Ester Oil2006

    • Author(s)
      R.Hanaoka, H.Ishino, S.Takata, H.Yamamoto and Y.Nakagami
    • Organizer
      Book of Abstract- 6th International Conference On Electric Charges In Non-Conductive Materials(CSC-6)
    • Place of Presentation
      Tour(France)
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 同軸円錐型電極によるEHD液体ジェットの特性2006

    • Author(s)
      細谷 直輝, 花岡 良一, 高田 新三, 深見 正
    • Organizer
      平成18年電気学会基礎・材料・共通部門大会
    • Place of Presentation
      熊本
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 同軸円錐型電極の角度によるEHD液体ジェットの特性の相違2006

    • Author(s)
      高橋 尉治朗, 細谷 直輝, 花岡 良一, 高田 新三, 深見 正
    • Organizer
      平成18年度電気関係学会北陸支部連合大会
    • Place of Presentation
      金沢
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Properties of EHD Liquid Jet Caused by Coaxial Cone to Rod Electrode2006

    • Author(s)
      R.Hanaoka, N.Hosodani, N.Nakamichi, S.Takata and T.Fukami
    • Organizer
      Proceedings of the 2006 International Symposium on Electrohydrodynamics (2006 ISEHD), Buenos Aires, Argentine
    • Place of Presentation
      Buenos Aires(Argentine)
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Flow Properties of EHD Liquid Jet Generated by Coaxial Cone to Rod Electrode Assembly2006

    • Author(s)
      N. Hosodani, H. Nakamichi, R. Hanaoka, S. Takata, T. Fukami
    • Organizer
      2006 National Convention Record 1EE Japan, Vol.[7]
    • Place of Presentation
      Yokohama
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Influence of Applied Voltage Waveform on Impulse Creeping Discharges in Rapeseed Ester Oil.2006

    • Author(s)
      R. Hanaoka, H. Ishino, S. Takata, H. Yamamoto, Y. Nakagami
    • Organizer
      Book of Abstract-6th International Conference On Electric Charges In Non-Conductive Materials(CSC-6)
    • Place of Presentation
      Tour(France)
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Properties of EHD Liquid Jet Generated by Coaxial Cone to Rod Electrode Assembly.2006

    • Author(s)
      N. Hosodani, R. Hanaoka, S. Takata, T. Fukami
    • Organizer
      2006 Annual Conference Fundamentals and Materials Society IEE Japan
    • Place of Presentation
      Kumamoto
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Difference on Properties of EHD Liquid Jet Due to Angle of Cone Electrode.2006

    • Author(s)
      I. Takahashi, N. Hosodani, R. Hanaoka, S. Takata, T. Fukami
    • Organizer
      2006 Joint Conference Hokuriku Chapters of Electrical Societies
    • Place of Presentation
      Kanazawa
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Properties of EHD Liquid Jet Caused by Coaxial Cone to Rod Electrode.2006

    • Author(s)
      R. Hanaoka, N. Hosodani, N. Nakamichi, S. Takata, T. Fukami
    • Organizer
      2006 International Symposium on Electro-hydrodynamics(2006 ISEHD)
    • Place of Presentation
      Buenos Aires(Argentine)
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] 高電圧工学2007

    • Author(s)
      花岡 良一
    • Total Pages
      202
    • Publisher
      森北出版株式会社
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary 2006 Annual Research Report
  • [Book] 高電圧工学2007

    • Author(s)
      花岡良一
    • Total Pages
      202
    • Publisher
      森北出版株式会社
    • Related Report
      2007 Annual Research Report
  • [Patent(Industrial Property Rights)] 電気流体力学ポンプ2006

    • Inventor(s)
      花岡 良一, 高田 新三, 深見 正
    • Industrial Property Rights Holder
      金沢工業大学
    • Industrial Property Number
      2006-325678
    • Filing Date
      2006-12-01
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 電気流体力学ポンプ2006

    • Inventor(s)
      花岡良一, 高田新三, 深見 正
    • Industrial Property Rights Holder
      金沢工業大学
    • Industrial Property Number
      2006-325678
    • Filing Date
      2006-12-01
    • Related Report
      2006 Annual Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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