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345㎸급 SF?/N₂ 혼합가스 GIL설계를 위한 불평등 전계에서 최대전계 계산방법 비교
이해영(H.Y.Lee),김철호(J.C.Jung),정재철(J.C.Jung),장용무(Y.M.Chang),김정태(J.T.Kim),구자윤(J.Y.Koo) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.11
Gas Insulated transmission -Line(GIL) is effective for underground power transmission. SF" is widely used for GIL due to its plausible insulation characteristics. However, high greenhouse gas emission of SF6 is one of the hot environmental issues. Therefore, an appropriate ratio of SF?(20%)/N₂(80%) gas mixture is our concern for the insulation material. This paper present an investigation on breakdown characteristics by maximum electric field of the rod-plane electrode of SF?/N₂ gas mixture as a design parameter of 345㎸ class GIL.
디젤엔진에서 국소 순간 화염온도와 Soot 농도에 관한 연구
이선봉(S.B. Lee),이태원(T.W. Lee),정재철(J.C. Jung),이상석(S.S. Lee),하종률(J.Y. Ha) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
The instantaneous flame temperature and soot formation and oxidation in a D. I. Diesel engine are easured using a two-color method. The proposed method based on the continuous spectral radition from the soot particles in flames is applicable to industrial Diesel engines without major modifications of their main characteristics. Measurements are performed at one location inside the combustion chamber of a D. 1. Diesel engine. Effects of diffrent engine speeds and loads, injection timings, piston cavitys on flame temperature and KL factor which is an index of soot concentrations were examined. A Little temperature change were observed with increasing rpm, while increased with loads. The higher the flame temperature is, the lower the KL factor is.<br/>
디젤엔진에서 국소 순간 화염온도와 Soot 농도에 관한 연구
이선봉,이태원,정재철,이상석,하종률 동아대학교 공과대학부설 생산기술연구소 1996 生産技術硏究所硏究論文集 Vol.1 No.2
The instantaneous flame temperature and soot formation and oxidation in a D.I. diesel engine are measured using a two-color method. The proposed method based on the continuous spectral radiation from soot particles in flames is applicable to industirial diesel engines without major modifications of their main characteristics. Measurements are performed at one location inside the combustion chamber of a D.I. diesel engine. Effects of different engine speeds and loads, injection timings, piston cavity types on flame temperature and KL factor which is an index of soot concentrations were examied. A little temperature change were observed with increasing engine speeds, while apparently increased with loads. The higher the flame temperature is, the lower the KL factor is.