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Mixed Hydrogen Gas Generator용 전력변환장치 개발
정장근(Jang-Gun Jung),문상필(Sang-Pil Mun),조길제(Gil-Je Cho),김장일(Chang-Il Kim) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
In this paper, the basic experiment, electrolytic cell design and basic manufacturing have been made to interpret the characteristics of Hydrogen-Oxygen-Gas-Generator. As for the detailed matters, the data research on basic technology on Hydrogen-Oxygen-Gas and analysis on characteristics of Hydrogen-Oxygen-Gas from basic experiment. Also the experiment of characteristics and comparative evaluation between constant current source using IGBT converter from existing method and constant current source using new rnase shift PWM control method converter. As results wren it has injected constant DC current, we has compared Gas quantities by variable ripple frequencies using phase shift PWM control method converter. Therefore, in linear region, it has not different Gas quantities by constant DC current and by phase shift PWM control method converter. Also, it has increased Gas quantities wilder linear region when put ripple frequency at saturation region Through, Gas quantities and input power, it has acquired higher input power per Gas quantities at rut pulse curren. Therefore, wren designing converter or inverter for electrolysis, which has ripple current.
코로나 방전-EGR 조합시스템에 의한 디젤기관의 배기 가스 특성
박재윤,정장근,김종석,하현진,Park, Jae-Yoon,Jung, Jang-Gun,Kim, Jong-Suk,Ha, Hyun-Jin 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.7
고연료 중 대부분이 수소와 탄소의 결합물이다. 연료들은 엔진 내부에서 완전 연소되었을 경우는 수분인 증기와 $CO_2$가 발생된다. 그러나 대개 불완전 연소가 일어나 $NO_x$나 Smoke가 발생되어진다. 그리고 이 물질은 인해에 매우 해로운 물질들이다. 본 논문에서는 EGR과 상용주파수를 이용한 플라즈마 장치를 조합하여 배기가스 유해물질 제거 특성을 연구하였다. $NO_x$의 경우에는 전압과 EGR율이 증가할수록 유해물질 제거 특성이 우수하였고, Smoke의 경우에는 EGR 율이 증가하게 되면 Smoke의 발생율이 증가하였으나 전압이 증가하게 되면 발생율이 감소하였다. A great part of flint fuel is Hydrogen and carbon's combination, they should be generated steam and carbon gas when combine with oxygen for perfect combustion in the inside of engine but, the pollutive material are discharged, even though perfect combustion condition especially $NO_x$ and Smoke. they are really harmful for health. In this paper was shown the result of discharging gas' reduction quality. which used combination of corona discharge using the high voltage source of common frequency with EGR. $NO_x$ is increased in entire load erea in proportion to increasing of EGR rate and impression voltage. Smoke is increased slowly under 75[%] in load rate but it is increased rapidly in entire load erea and the reduction rate of Smoke is increased in proportion to increasing of impression voltage.
고주파 플라즈마 시스템에 의안 디젤기관의 배기가스 특성
박재윤,정장근,김종석,하현진,Park, Jae-Yoon,Jung, Jang-Gun,Kim, Jong-Suk,Ha, Hyun-Jin 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.5
NOx, Soot and other exhausted components already became a dangerous state as principal materials of the air pollution. Therefore, the exhausted regulations are getting strict in the many countries. In this paper, reduction characteristic of NOx Soot and CO from diesel engine are investigated when MF plasma system is put to the diesel engine. NOx is decreased in all measured load and applied voltage to plasma reactor. 자동차에서 발생되어지는 NOx, Soot 그리고 기타 배출 가스는 대기오염의 주요한 원인물질이다. 그래서 많은 나라에서 이를 점점 더 엄격하게 규제하고 있는 실정이다. 본 논문에서는 디젤 엔진에서 발생되어진 NO, Soot 그리고 CO를 고주파 플라즈마 시스템을 이용하여 제거특성을 연구 하였다. 전반적으로 유해 물질들이 전압이 증가함에 따라 그 제거특성이 우수하게 나타났다.
플라즈마 살균효과 향상을 위한 공진형 인버터 전원시스템
서기영,문상필,정장근,김주용,Suh, Ki-Young,Mun, Sang-Pil,Jung, Jang-Gun,Kim, Ju-Yong 한국조명전기설비학회 2004 조명·전기설비학회논문지 Vol.18 No.3
전기 에너지를 이용한 살균장치는 화학적인 과정이 없으며, 2차적인 환경 오염도 발생시키지 않는 장점을 가지고 있다. 또한 전력변환회로에는 영전류 스위칭과 영전압 스위칭을 사용한 소프트 스위칭 토폴로지에 의하여 스위칭 손실을 감소시키고, 장치의 크기를 소형화시킬 수 있는 장점이 있다. 제안한 전원장치는 기존의 장치들보다 출력전류가 매우 적어 전원 시스템으로 제작할 경우 소형화가 가능하며 가격이 저감될 수 있다. 따라서 이 전원 장치는 전력 소비가 적고 전력 변환이 급격한 곳에 적합하다. A sterilizer equipment by using electrical energy has metrits that no process of chemical and no second environmental pollution, Also, the power conversion circuit for sterilizer equipment has mertis that are reducing switching loss for soft switching topology by using zero current and zero voltage switching, and miniaturizing size of equipment. The proposed power device which has lower output current than other devices is possible to be compacted in it's size reduced it's price if the proposed power device is used for power system. Therefore, it is adapted for both less power consumption and sudden power conversion
MF 플라즈마-EGR 조합시스템에 의한 디젤기관의 배기 가스 특성
하현진,박재윤,정장근,김종석,Ha, Hyun-Jin,Park, Jae-Yoon,Jung, Jang-Gun,Kim, Jong-Suk 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.6
NOx Smoke and other exhausted components already became a dangerous state as principal materials of the air pollution. Therefore, the exhausted regulations are getting strict in the many countries. In this paper, reduction characteristic of NOx Smoke and CO from diesel engine are investigated, when MF plasma-EGR hybride system is put to the diesel engine NOx is decreased in all measured load and applied voltage to plasma reactor. However Smoke is increased as increasing EGR rate and it is decreased as increasing applied voltage. 디젤 자동차 배출 가스인 NOx Soot 그리고 기타 가스들은 주요한 대기 오염의 물질들이다. 그러므로 여러 많은 나라들이 이에 관련된 규제 법규를 점점 더 엄격하게 규제하고 있는 실정이다. 본 논문에서는 디젤 자동차에서 발생되어지는 NOx, 매연 그리고 CO를 고주파 플라즈마와 EGR 시스템을 조합하여 그 제거 특성을 연구하였다. NOx는 부하와 전압이 증가하게 되면 NOx는 감소하고 매연의 경우에는 EGR율이 증가함으로 인해서 증가 하였다. 그러나 전압이 증가함에 따라서는 감소하였다.
박재윤,김종석,정장근,고희석,박상현,이현우,Park, Jae-Yoon,Kim, Jong-Seok,Jung, Jang-Gun,Goh, Hee-Seok,Park, Sang-Hyun,Lee, Hyun-Woo 한국전기전자재료학회 2004 전기전자재료학회논문지 Vol.17 No.11
This paper is investigated about the effect of carrier gas type and the humidity for generating hydrogen gas. The vibration of the water surface is more powerful with increasing applied voltage. In this experimental reactor which is made of multi-needle and plate, the maximum acquired hydrogen production rate is about 3500 ppm. In the experimental result of generating hydrogen gas by non-thermal plasma reactor, the rate of generating hydrogen gas is different with what kind of carrier gas is. We used two types of carrier gas, such as $N_2$ and He. $N_2$ as carrier gas is more efficient to generate hydrogen gas than He because $N_2$ is reacted with $O_2$, which is made from water dissociation. In comparison with water droplet by humidifier and without water droplet by humidifier, the generation of hydrogen gas is decreased in case of water droplet by humidifier. That is the result that the energy for water dissociation is reduced on water surface because a part of plasma energy is absorbed at the small water molecular produced from humidifier.
김주용(Ju-Yong Kim),문상필(Sang-Pil Mun),정장근(Jang-Gun Jung),이현우(Hyun-Woo Lee),서기영(Ki-Young Suh) 한국조명·전기설비학회 2003 한국조명·전기설비학회 학술대회논문집 Vol.2003 No.-
A resonant type voltage source and power device and a control method using Pulse Density Modulation(PDM) power control and Pulse Width Modulation(PWM) voltage control for plasma sterilization are described. For the stability of discharge in the generating tube, it is desirable that the peak apply voltage is constant. The PDM power control is employed for sustaining the voltage constant at any generating tube input power. Moreover, to avoid the influence of input AC voltage fluctuation etc., PWM voltage control with generating tube peak voltage feedback is used. Both functions were confirmed by the experiment with 6.5[kHz], 1.8[kW] inverter and generating tube. The effect of input synchronous PDM method for input current stabilizing confirmed also.