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장벽 방전형 공기 펌프의 이온풍 발생에 미치는 방전전극 형상의 영향
황덕현(Deok-hyun Hwang),문재덕(Jae-Duk Moon) 대한전기학회 2009 전기학회논문지 Vol.58 No.5
Existing cooling technologies no longer provide adequate heat dissipation due to excessive heat generation caused by the growing component density on electronic devices. An ionic gas pump can be used for the thermal management of micro-electronic devices, since the size of pump can be reduced to a micrometer scale. In addition, the gas pump allows for gas flow control and generation without moving parts. This ideal property of gas pump gives rise to a variety of applications. However, all these applications require maximizing the wind velocity of gas pump. In this study a barrier discharge type gas pump, with a needle-shaped corona electrode instead of a plate-shaped corona electrode, has been investigated by focusing on the corona electrode shape on the wind velocity and wind generation yield. As a result, the enhanced wind velocity and wind generation yield of 1.76 and 3.37 times were obtained with the needle-shaped corona electrode as compared with the plate-shaped corona electrode of the proposed barrier discharge type gas pump.
황덕현(Deok-hyun Hwang),문재덕(Jae-Duk Moon),김진규(Jin-Gyu Kim),이우석(Woo-Seok Lee) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
현재 고밀도 전자 장치에 적용되고 있는 송풍기식 냉각 방식은 장치의 특성상 효율이 낮은 문제점을 지니고 있다. 따라서 이러한 문제점을 해결하고자 다양한 형태의 연구가 다방면에서 수행되고 있으며 그중 코로나 방전중에 발생되는 이온풍을 이용한 송풍장치는 풍속발생 및 제어가 쉽고, 소음이 적으며, 구조가 간단하여 초소형화를 실현할 수 있는 특성을 가지고 있다. 이러한 장점은 다방면에서 응용될 수 있으며, 이온풍의 유속의 세기와 효율이 향상되면 더욱더 응용범위는 확대가 가능하게 될 것이다. 본 연구는 침대 그물형 이온풍 발생장치에서 방전침전극의 형상이 이온풍속의 크기와 발생효율에 미치는 영향을 실험적으로 검토하였다.
황덕현(Deok-hyun Hwang),문재덕(Jae-Duk Moon) 대한전기학회 2010 전기학회논문지 Vol.59 No.3
An electric fan for cooling high density electronic devices is limited and operated in very low efficiency. The corona discharge is utilized as the driving mechanism for an ionic gas pump, which allows for air flow control and generation with low noise and no moving parts. These ideal characteristics of ionic pump give rise to variety applications. However, all of these applications would benefit from maximizing the flow velocities and yields of the ionic pump. In this study, a needle-mesh type ionic pump has been investigated by focusing on the radius of curvature of corona needle points elevating the ionic wind velocity and efficiency. It is found that the radius of curvature of the corona discharge needle point influences significantly to produce the ionic wind and efficiency. As a result, an elevated ionic wind velocity and increased ionic wind generation yield can be obtained by optimized the radius of curvature of the corona needle electrode.
황덕현 ( Deok-hyun Hwang ),박소영 ( So-young Park ),배지선 ( Ji-seon Bae ),정송주 ( Song-ju Jeong ),홍진근 ( Jin-keun Hong ),박현주 ( Hyun-joo Park ) 한국정보처리학회 2020 한국정보처리학회 학술대회논문집 Vol.27 No.2
본 논문에서는 딥웹 환경에서 사이버 범죄 활동에 대한 정보를 중심으로 분석한다. 분석된 정보는 사이버 수사기관에 범죄 분석을 위한 보조정보로 활용될 수 있도록 지원하는 것과 청소년들의 사이버 범죄에 대한 위중성 및 범법성을 인지시키기 위한 교육을 목적으로 활용될 수 있도록 연구되었다. 따라서 본 논문에서는 크롤링, 파싱, 시각화 3가지 과정을 기반으로 딥웹 환경에서 활동하고 있는 정보를 키워드를 중심으로 수집하고 분석하는 솔루션 환경을 구현하였다. 분석된 정보는 사이버에서 일어나는 많은 범죄활동 가운데 가장 일어나기 쉬운 범죄 유형과 주의 깊게 수사가 이루어져야 할 범죄들을 정리하며, 수사의 방향성을 캐치 할 수 있도록 지원하는 기능을 포함한다.
침대 그물전극간의 제3전극이 이온풍 발생에 미치는 영향
黃德賢(Deok-Hyun Hwang),文在德(Jae-Duk Moon) 대한전기학회 2008 전기학회논문지 Vol.57 No.11
Cooling technologies using natural and forced convection are limited and operated in very low efficiency. The corona discharge is utilized as the driving mechanism for an ionic pump, which allows for air flow control and generation with low noise and no moving parts. These ideal characteristics of ionic pump give rise to variety applications. However, all of these applications would benefit from maximizing the flow velocities and efficiencies of the pumps. In this study a needle-mesh type ionic pump, with a ring type third electrode installed just near the needle point, has been investigated by focusing on elevating the ionic wind velocity and efficiency. As a result, the enhanced ionic wind velocity and increased power yield can be obtained with the proposed ionic pump with the third electrode.
황덕현(Deok-hyun Hwang),정회원(Hoi-won Jung),문재덕(Jae-Duk Moon) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.5
Cooling systems for electronic equipments are becoming more important. Cooling technologies using natural and forced convection are limited and operated in very low efficiency A corona discharge is utilized as the driving mechanism for an air pump, which allows for airflow generation with low noise and no moving parts. However they do not enhance the flow rate and overcome the control mechanism of the pump. in this study a point-mesh type air pump, with a third electro de installed near the corona point, has been proposed and investigated by focusing on elevating the ionic wind velocity and power yield. As a result, the significantly enhanced ionic wind velocity and tremendously increased power yield can be obtained with the proposed air pump system.
중첩형 다단전극에 의한 효율적인 전해 이온수 발생 특성
신동화(Dong-Hwa Shin),황덕현(Deok-Hyun Hwang),정재승(Jae-Seung Jung),김형표(Hyung-Pyo Kim),김진규(Jin-Gyu Kim) 한국조명·전기설비학회 2016 조명·전기설비학회논문지 Vol.30 No.3
Applications of electrolytic ion water generated by the oxidation-reduction have gradually been expanded due to their strong sterilizing power and a surface active force. We demonstrate the effect of the multi-layer type electrode for effective ion water generation. The multi-layer type electrode has ability to generate stronger acid and alkali water by increase of the electrode reactive area. Also power consumption efficiency enhances because the electrodes disposed in middle position of the reactive cell raise the usage rate by overlapped effect as an electrolysis electrode.