• 제목/요약/키워드: 3Electrodes-2Gaps

검색결과 12건 처리시간 0.032초

동축형 전극길이 변화시의 연면무성방전에 의한 오존발생특성(I) (Ozone Generation Characteristics by Surface-Silent Discharge According to the Length of Coaxial Electrode)

  • 조국희;김영배;서길수;이형호;이상근;이광식
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제48권12호
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    • pp.791-797
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    • 1999
  • Recently the ozone generation system is well used for cleaning the contaminated water by using the strong oxidization effects of ozone. In this paper the concentration, yield and generation quantity of the ozone by the Surface-Silent Discharge According to the Length of Coaxial Electrode is described. The electrodes composed of 3 electrodes-2 gaps are coaxial type and the ozone generation tube were designed and fabricated from the point of view of the energy efficiency, stability and easy control. To investigate the ozone generation dependency on electrode length, a few discharge tubes with different lengths were fabricated. The experimental equipments were provided with cooling system and dehumidifier for the many testing conditions. The main results show that the concentration, yield and generation quantity of ozone are improved by decreasing gas temperatures and increasing electrode lengths.

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무성방전형 오존발생장치 제작 및 수질 개선 특성 (Trial Manufacture of Ozone Generator Using Silent Discharge Type and Improvement Properties of the Water Quality in the Lake)

  • 임헌찬;김진규;우성훈
    • 전기학회논문지P
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    • 제50권3호
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    • pp.125-129
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    • 2001
  • ln this paper, a ozone generator using superimposition of silent discharge has been designed and manufactured. This type ozone generator is equipped with three electrodes and two gaps. Ozone is generated by superimposition of silent discharge, which is respectively come from two gaps. The maximum values of ozone concentration, ozone generation flow and ozone energy field were obtained 4,750[ppm], 2.37[g/h], 102.3[g/kWh]. Also, the result of reaction of 1,8921ppm] ozone and the sampling water from the lake, the water quality was improved from IV grade to In grade, and obtained 100[%] sterilization rate of Escherichia coli within 5.0(min).

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레이저 웰딩 기술을 이용한 ECL용 유리 기판 접합에 대한 고찰 (Investigation of Glass Substrate Sealing for ECL Application using Laser Welding Technology)

  • 성열문
    • 조명전기설비학회논문지
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    • 제29권12호
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    • pp.28-32
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    • 2015
  • In this work, we reported fabrication of sealing the glass substrate using laser treatment at low temperature for electrochemical luminescence (ECL) cell. The laser treatment at temperature is using laser diode. The glass substrate sealing by laser treatment tested at 3-10W, 2-5 mm/s for build and tested. The sealing laser treatment method will allow associate coordination between the two glass substrate was enclosed. The effect of laser treatment to sealing the glass substrate was found to have cracks and air gap at best thickness of about 550-600 im for condition 3 W, 3 mm/s. The surface of sealing was roughness which was not influent to electrodes It can reduce the cracks, crevices and air gaps as well, improves the performance viscosity in butter bus bar electrodes. Therefore, it is more effective viscosity between two FTO glasses substrate.

환경개선용 기체전기방전을 이용한 오존발생기술 개발 (Development of Ozone Generation Technology Using Gaseous Electrical Discharge for Environment Improvement)

  • 이동헌;송현직;구건효
    • 조명전기설비학회논문지
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    • 제15권3호
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    • pp.25-34
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    • 2001
  • 본 논문에서는 방전관을 채용하여 전기적 기체방전의 중침을 이용한 새로운 방전형식의 환경개선용 오존발생 기술을 개발하였다. 방전관형 오존발생기(DLO)는 설치된 3개의 전극중 접지전극인 중심전극으로 방전관을 사용 하였으며, 나머지 2개의 메쉬형 내부전극과 나선형 외부전극에 180[$^{\circ}$]의 위상차를 가진 2개의 교류고전압 전원을 인가함으로써 방전관과 내부전극, 방전관과 외부전극사이의 방전공간에서 각각 발생되는 무성방전의 중침에 의하여 오존이 발생되는 구조이다. 이때, 원료가스의 유량, 방전전력 및 DLO의 사용 개수 변화에 따른 방전특성과 오존생성특성을 연구검토하였으며, DLO로부터 생성된 오존을 대기오염물질인 NO 가스에 접촉시켰을 때 NO 제거특성이 우수하여 방전관형 오존발생기가 대기환경개선 설비로 적용가능함을 확인하였다.

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삼각 팁을 이용한 저전압 구동형 정전방식 마이크로액추에이터 (Electrostatic Microactuators operated at low drive voltages Using Triangular Tip)

  • 김봉환;성우경;전국진
    • 대한전자공학회논문지SD
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    • 제38권9호
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    • pp.605-610
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    • 2001
  • 본 연구에서는 저전압 구동형 정전방식을 이용하여 마이크론 이하 간격(sub-micron gap)을 갖는 마이크로액추에이터를 제작하였다. 사각 팁과 삼각 팁의 두 가지 방식으로 마이크로액추에이터를 제작하여 비교하였다. 삼각 팁으로 제작된 마이크로액추에이터의 gap은 0.55㎛∼l.35㎛었다. 0.55㎛ gap을 갖는 제작된 마이크로액추에이터의 경우에 13V의 낮은 전압에서 1㎛의 변위와 2.3μN의 발생력을 나타내었다. 이 마이크로액추에이터의 1차 공진주파수의 측정값의 23kHz이었다.

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3상전압을 이용한 중첩방전형 오존발생기의 특성 (The Characteristics of Superposed Ozonizer using Three-Phase Voltage)

  • 김영훈;전병준;송현직;윤영대;이광식
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1999년도 하계학술대회 논문집 E
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    • pp.2259-2261
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    • 1999
  • In this paper, an ozonizer, which can generate individual and superposed silent discharge, using three-phase voltage has been designed and manufactured. The ozonizer consists of 3 electrodes(Central Electrode, Internal Electrode and External Electrode) and 2 gaps(gap between Central Electrode and Internal Electrode, gap between Internal Electrode and External Electrode). Ozone is generated according to voltage supplying method to each electrode by individual silent discharge and three-phase superposed discharge. The characteristics of ozone generation were investigated with variation of discharge power and the quantity of supplied gas($O_2$). In case of individual silent discharge, the maximum values of ozone concentration, ozone generation and ozone yield were obtained between internal electrode and external electrode, and its values were 2300[ppm], 570[mg/h] and 745[g/kWh] respectively. Each maximum values was 5039[ppm], 1773[mg/h] and 851[g/kWh] respectively, when three-phase superposed silent discharge was employed. Therefore, characteristics of ozone generation with three-phase voltage are improved compared with single-phase voltage because silent discharge is generated continuously.

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PLASMA-SULFNITRIDING USING HOLLOW CATHODE DISCHARGE

  • Urao, Ryoichi;Hong, Sung-pill
    • 한국표면공학회지
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    • 제29권5호
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    • pp.443-448
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    • 1996
  • In order to plasma-sulfnitride by combining ion-nitriding of a steel and sputtering of MoS$_2$, chromium-molybdenum steel was plasma-sulfritrided using hollow cathode discharge with parallel electrodes which are a main of the steel and a subsidiary cathode of $MoS_2$. The treatment was carried out at 823K for 10.8ks under 665Pa in a 30% $N_2$-70% $H_2$ gas atmosphere. Plasma-sulfnitriding layers formed of the steel were characterized with EDX, XRD, micrographic structure observation and hardness measurement. A compound layer of 8-15$\mu\textrm{m}$ and nitrogen diffusion layer of about 400$\mu\textrm{m}$ were formed on the surface of plasma-sulfnitrided steel. The compound layer consisted of FeS containing Mo and iron nitrides. The nitrides of $\varepsilon$-$Fe_2_3N$ and $\gamma$'-$Fe_4N$ formed under the FeS. The thickness of compound layer and surface hardness were different with the gaps between main and subsidiary cathodes even in the same sulfnitriding temperature. The surface hardnesses after plasma-sulfnitriding were distributed from 640 to 830Hv. The surface hardness was higher in the plasma-sulfnitriding than the usual sulfnitriding in molten salt. This may be due to Mo in sulfnitriding layer.

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내부전극 조밀도 변화에 따른 중첩방전형 오존발생기의 특성 (The Characteristics of a Superposed Discharge Type Ozonizer with Variation of Mesh in Internal Electrode)

  • 송현직
    • 조명전기설비학회논문지
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    • 제19권5호
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    • pp.87-93
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    • 2005
  • 본 논문에서는 고농도$\cdot$고수율 오존발생기를 개발할 목적으로 망사형 내부전극과 무성방전의 중첩을 이용한 중첩방전형 오존발생기를 설계$\cdot$제작하였다. 중첩방전형 오존발생기는 방전공간에 3개의 전극(중심전극, 내부전극 및 외부전극)과 2개의 gap(중심전극과 내부전극 사이의 gap과 내부전극과 외부전극 사이의 gap)으로 구성되어있다. 중첩방전형 오존발생기의 중심전극을 공통접지하고 내부전극과 외부전극에 $180{[^\circ]}$의 위상차를 가진 역극성의 교류 고전압을 각각 인가하면 각각의 방전 gap에서 발생하는 무성방전이 중첩되면서 오존이 발생된다. 이때, 내부전극의 조밀도가 증가할수록 방전전극의 면적이 확대되고 방전공간의 전력밀도가 억제되어 오존생성특성이 상승하였다. 그 결과 최대 17,720[ppm], 5.4[g/h] 및 250[g/kwh]의 오존을 얻을 수 있었다.

냉간 금형용 공구강의 Cu 전극을 이용한 방전 홀에 관한 연구 (Electron Discharge Machining (EDM) and Hole EDM of Cold Heat-treated Tool Steel Molds (STD11) by using Cu Electrodes)

  • 박인수;이은주;김화정;왕덕현
    • 한국기계가공학회지
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    • 제17권4호
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    • pp.76-82
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    • 2018
  • 3D formed Electrical Discharge Machining (EDM) and hole EDM were conducted for die and mold manufacturing with electrodes which were made by mechanical machining and wire EDM. It is difficult to machine the hardened material after heat treatment and quenching with traditional machining. The only method of machining hardened material is die-sinking EDM. In this research, hole EDM was conducted for heat-treated cold-worked tool steel (SKD11) for use as a die material. The EDM surfaces were analyzed by pulse-on time and peak current of EDM current, according to the machining conditions of EDM. The EDM surface profiles were affected by the peak current. The contribution of each factor is peak current (91.63%) and pulse-on time (0.93%). The best surface roughness was obtained with a $130{\mu}s$ pulse-on time and a 14.2 A peak current. With uniform EDM processing, the surface deteriorated with increasing pulse-on time and peak current. The thickness of the solidified layer induced by EDM was increased as the peak current, crater shapes, and erupted shapes of EDM surfaces were increased. Therefore, microcracking gaps induced by surface tension were increased.

3상 전압을 사용한 중첩방전형 오존발생기의 오존생성 및 방전잡음특성 (The Ozone Generation and Discharge Noise Characteristics of Superposed Discharge Noise Characteristics of Superposed Discharge Type Ozonizer Using Three-Phase Voltage)

  • 전병준;송현직;김영훈;최상태;이광식
    • 조명전기설비학회논문지
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    • 제14권2호
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    • pp.59-67
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    • 2000
  • 본 논문에서는 단목무성방전과 3상 전압을 사용한 중첩무성방전을 인가할 수 있는 오존발생기를 설계.제작하였다. 오존발생기는 3개의 전극(중심천극, 내부천극 및 외부전극)과 2개의 방전갭(중심전극과 내부전극 사이의 갭 및 내부전극과 외부전극 사이의 갭)으로 구성되어 있으며, 단목무성방전과 3상 중접방전이 인가되는 방식에 따라 오존화 가스가 생성된다. 이때 방전전력과 원료가스($O_2$)의 유량의 변화에 따른 오존생성특성을 연구한 결과, 단독무성방전의 경우, 최대 2300[ppm], 570[mg/h] 및 745[g/kWh]의 오존생성특성을 얻을 수 있었으며,3상 전압을 인가한 경우에는 5039[ppm], 1773[mg/h] 및 851[g/kWh]을 각각 얻을 수 있었다. 따라서 3상 중첩무성방전 이 단독무성방전에 비하여 오존생성특성올 향상시킬 수 있음을 확인하였다.

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