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Development of High Efficiency Ozone Generation Using Non-equilibirum Plasma Based on Hydrodynamic Instability

Research Project

Project/Area Number 07650245
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

YOSHIDA Hideo  Tokyo Inst.of Tech., Fac.Eng., Assoc.Prof., 工学部, 助教授 (50166964)

Co-Investigator(Kenkyū-buntansha) TADA Shigeru  Tokyo Inst.of Tech., Fac.Eng., Res.Assoc., 工学部, 助手 (70251650)
KOBAYASHI Kenichi  Tokyo Inst.of Tech., Fac.Eng., Res.Assoc., 工学部, 助手 (10242273)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsOzone / Non-equilibrium Plasma / Hydrodynamic Instability / Taylor Vortex / Centrifugal Separation
Research Abstract

Conventionally, ozone was produced from oxygen using non-equilibrium plasma silent discharge. A new ozone generator has been suggested in order to effectively separate generated ozone from ambient oxygen in non-equilibrium plasma (silent discharge). The separation principle is based on the difference between the centrigugal forces for ozone and oxygen, and the fluid motion associated with Taylor instability. To this end, an annular shaped prototype composed of a fixed outer cylindrical electrode and a rotating inner one was designed. The outer electrode is a copper block with cooling pipes (the inner diameter of the electrode is 42mm) ; the inner electrode is the Pyrex cylinder, the inner side of which is plated with nickel (the outside diameter the electrode is 40mm). Experiments were conducted varying the oxygen flow rate, and the rotation speed of the inner electrode (0-4000rpm), and the supplied electrical current frequency (250-2000Hz) with the fixed voltage of 10kV.The effect of the inner electrode rotation is significant for low flow rate. This is because the residence time of the supplied oxygen inside the discharge section is relatively longer for smaller flow rate. The ozone concentration increases with increasing rotation rate, and the attained maximum ozone concentration is about 1.5 times as large as that without rotation. However, the ozone generation efficiency is not so improved with increasing rotation rate of the inner electrode. Hence, at the present stage, our aim has not been fully realized ; in order to find the optimum condition when the suggested principle works properly, the detailed clarification of the phenomena is necessary as a next step of the present study.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 吉田英生: "流体不安定現象を利用した非平衡プラズマによるオゾン生成" 第33回日本伝熱シンポジウム講演論文集. 1. 125-126 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Yoshida: "Ozone Generation by Non-equilibrium Plasma Using Flow Instability" Proc.33rd Japan Heat Transfer Symp.1. 125-126 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 吉田英生: "流体不安定現象を利用した非平衡プラズマによるオゾン生成" 第33回日本伝熱シンポジウム講演論文集. 1. 125-126 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 吉田英生: "流体不安定現象を利用した非平衡プラズマによるオゾン生成" 第33回日本伝熱シンポジウム講演論文集. (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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