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전기영동을 이용한 미세 플라스틱 입자 크기별 집진 효율 특성
윤웅희,김성훈,이헌경,김진규 한국조명.전기설비학회 2022 조명·전기설비학회논문지 Vol.36 No.8
Recently, due to the increase in global plastic production and consumption, micro plastics was being detected not only in the ocean but also in the atmosphere. Although research results on environmental pollution and harmfulness to the human body due to micro plastics floating in the air have been reported, existing studies related to particle collection using electrophoresis were mainly conducted from sub-micro to nano size dust. Therefore, in this study, the collection efficiency for particle size was measured by conducting a collection experiment on micro plastic particles using electrophoresis. As a result of measurement, in the experiment of corona current characteristics, the negative discharge had higher breakdown voltage, corona current and more stable corona discharge than the positive discharge. In the collection characteristic experiment, 30 and 100mesh particles had higher collection efficiency than 50 and 70mesh particles, and ‘U’ shape of a characteristic was shown. The maximum collection efficiency was measured at 100mesh particle size and 98.7% at 20kV applied voltage.
코로나 전극의 육각 배치에 따른 이온풍 분포 및 추력 특성 연구
윤웅희(Ung-Hui Yun),이헌경(Heon-Gyeong Lee),정재승(Jae-Seung Jung),권기진(Ki-Jin Kwon),김진규(Jin-Gyu Kim) 한국조명·전기설비학회 2018 조명·전기설비학회논문지 Vol.32 No.1
Ionic wind is an electro-hydrodynamic phenomenon that occurs when a corona discharge occurs between two asymmetric electrodes. Because the ionic wind does not need mechanical rotating parts unlike conventional motors and has a high energy efficiency to generate the wind, various researches have been conducted to apply ion wind to the fields of electrostatic precipitators, air purifiers, fluid pumps, cooling, propulsion. This study is for basic research of ion thruster and we investigated the characteristics of ionic wind distribution and Thrust according to hexagonal arrangement of corona electrodes. Experimental results show that the ionic wind distribution was strongest at the part where the corona electrode was disposed, and weakened at the part farther away, indicating a ‘V’ shape. The calculated thrust force using ionic wind distribution was weaker than the thrust force using corona current and the thrust force patterns were also completely different.
윤웅희(Ung-Hui Yun),이헌경(Heon-Gyeong Lee),김상준(Sang-Jun Kim),김진규(Jin-Gyu Kim) 한국조명·전기설비학회 2021 조명·전기설비학회논문지 Vol.35 No.7
This study is a basic research on the ionic wind propulsion technique, and the thrust characteristics of the ionic wind propulsion device of a two-stage series structure with an acceleration electrode applied with a negative voltage are studied based on various theoretical equations suggested in previous studies. Experimental results show that the current measured at the acceleration electrode increased as the amount of corona current decreased as the negative voltage applied to the accelerating electrode increased. The ionic wind velocity increased as the negative voltage applied to the acceleration electrode increased, and the thrust increased by up to 72.9%. In the condition of the applied voltage with the maximum thrust, the thrust efficiency decreased rapidly, but the kinetic energy efficiency decreased less.
인가전압 파형에 따른 표면 유전체 장벽 방전의 에너지 및 전력 소모량 특성
윤웅희(Ung-Hui Yun),김성훈(Seong-Hun Kim),김진규(Jin-Gyu Kim) 한국조명·전기설비학회 2024 조명·전기설비학회논문지 Vol.38 No.1
Dielectric barrier discharge(DBD) is categorized into volumetric dielectric barrier discharge (VDBD) and surface dielectric barrier discharge(SDBD). In the field of particle charging, VDBD devices have a complex structure compared to SDBD devices, and the plasma’s generation direction hinders the flow of particles. In addition, the research on the waveform of the applied voltage is limited to relatively regular non-sinusoidal waves such as square waves and triangular waves. Therefore, in this study, the energy and power consumption characteristics of SDBD under four low-frequency applied voltage waveforms were studied. The results of the study show that Type 4 has a higher energy and power consumption than other types of applied voltage waveforms, 4.75W and 6.10W, respectively, according to the calculation method using the Lissajous curve and voltage × current, and this can be visually verified through discharge photograph.