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Development of high-performance electrostatic filter utilizing coagulating effect of a. c. electric field

Research Project

Project/Area Number 14550123
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 設計工学・機械要素・トライボロジー
Research InstitutionToyohashi University of Technology

Principal Investigator

YANADA Hideki  Toyohashi University of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (90166554)

Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2003: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2002: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsElectrostatic filter / A. C, electric field / D.C. electric field / Insulating liquid / Coagulation / Reuse / Decrease in waste / Contamination control / 静電ブィルタ / 静電ろ過 / 凝集促進 / 汚染粒子
Research Abstract

In this research, three types of a new electrostatic liquid filter that utilizes both a. c. and d. c. electric fields, which has been proposed by Yanada, were manufactured on an experimental basis. Two filters are cylindrical in shape and one has a rectangular cross-section : Those three filters consist of the coagulating part, where an a, c. electric field is applied to make minute contaminant particles be coagulated, and of the capturing part, where a d. c. electric field is applied to capture the particles. In the cylindrical filters, the coagulating part is arranged on the outer part of the cylinder and the capturing part in the inner part of the cylinder. Only the difference in the two cylindrical filters is the flow direction in the coagulating part, that of one filter is the direction of the axis and that of another one is circumferential. The difference in the flow direction in the coagulating part leads to a difference in the magnitude of the velocity gradient in the passage there. The rectangular filter was manufactured to examine the effects of the shape and arrangement of the collector and electrode in the capturing part on the filter performance. It is shown that the filtration speed can be approximately doubled by utilizing both the a. c. and d, c. electric fields compared to the case where only the d. c. electric field is used, and the usefulness of the electrostatic liquid filter proposed is demonstrated. The comparison between the performance of the two cylindrical filters shows that the magnitude of the velocity gradient in the passage in the coagulating part strongly affects the filter performance. In addition, it is shown that the filter performance can be increased by appropriately designing the shape and arrangement of the collectors and electrodes in the capturing part.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 今泉, 川上, 松田, 大久保, 柳田: "交流電界の凝集促進効果を利用した液体用静電フィルタ(実機モデルの試作と性能評価)"日本機械学会講演論文集. No.043-1. 159-160 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 柳田, 吉田, 今泉, 大久保: "交流電界と直流電界を併用した絶縁性液体用静電フィルタ"平成16年度春季フルードパワーシステム講演会講演論文集. 49-51 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Imaizumi, T., Kawakami, Y., Matsuda, K., Ohkubo, F., Yanada, H.: "Electrostatic Liquid Filter Utilizing Coagulating Effect of A. C. Electric Field (Performance Evaluation of Actual Filter Models)"Proceedings of the 53rd Annual Meeting of Tokai Branch, the Japan Society of Mechanical Engineers. No.043-1. 159-160 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yanada, H., Yoshida, Y., Imaizumi, T., Ohkubo, F.: "Electrostatic Filter for Insulating Liquids Utilizing A. C. and D. C. Electric Fields."Proceedings of the 2004 Spring-Term, Meeting of Fluid Power Systems, the Japan Fluid Power System Society. 49-51 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 今泉, 川上, 松田, 大久保, 柳田: "交流電界の凝集促進効果を利用した液体用静電フィルタ(実機モデルの試作と性能評価)"日本機械学会講演論文集. No.043-1. 159-160 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 柳田, 吉田, 今泉, 大久保: "交流電界と直流電界を併用した絶縁性液体用静電フィルタ"平成16年春季フルードパワーシステム講演会講演論文集. (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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