http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
기술사례 : 선대구경 수평보링 발파공법(PLHBM)의 설계 연구
백종현 ( Jong Hyun Beak ),백상현 ( Sang Hyun Beak ),한동훈 ( Dong Hun Han ),원아람 ( Ah Ram Won ),김창섭 ( Chang Seop Kim ) 대한화약발파공학회 2012 화약발파 Vol.30 No.2
Blasting technology aims to maximize digging efficiency as well as minimize vibration and noise. So, it is key point of blasting technology to raise blasting effect as much as possible and reduce vibration and noise and the design of PLHBM that is the tunnel blasting method having such merit was studied in this paper. PLHBM has the excellent blasting efficiency as it drills the empty hole with high caliber of 250∼1,000mm at centre cut, contributes to blasting vibration reduction effect much and can be usefully applied to tunnel blasting sites. So it is judged that it enables the development of tunnel blasting method to be advanced one more step by studying and suggesting the design method of PLHBM.
준평등전계중 Dry Air내 산소의 농도에 따른 절연파괴 및 연면방전 특성 연구
백종현(Jong-Hyun Beak),석정후(Jeong-Hoo Seok),최병주(Byoung-Ju Choi),배성우(Sungwoo Bae),김기채(Ki-Chai Kim),박원주(Won-Zoo Park) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.11
This study was conducted to discover a substitute of SF<SUB>6</SUB> gas. SF<SUB>6 </SUB>gas is widely used across the industries. Thanks to superior electrical properties, in particular, it has been commonly used in electrical industry. However, there have been a lot of studies on its serious effect on global warming. As a substitute of this synthetic gas, a mixture of dry air and N₂/O₂ was chosen in this study. In case of N₂/O₂, dielectric strength differs depending on the mixing ratio. This study examined dielectric breakdown and flashover after adjusting oxygen percentage in the dry air. This test was conducted in a quasi-uniform electric field depending on pressure, oxygen concentration and gas mixtures. The test results found that dielectric voltage and flashover voltage were the highest at a certain oxygen concentration. It is the results of this photoionization and electron attachment of oxygen.
Dry Air/O<sub>2</sub> 혼합가스의 혼합비에 따른 절연파괴 및 연면방전 특성 연구
석정후,백종현,임동영,배성우,김기채,박원주,Seok, Jeong-Hoo,Beak, Jong-Hyun,Lim, Dong-Young,Bae, Sungwoo,Kim, Ki-Chai,Park, Won-Zoo 한국조명전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.6
This paper presents the discharge characteristics and economic feasibility of a Dry $Air/O_2$ and a $N_2/O_2$ mixture gas in order to review $SF_6$ alternative. From AC discharge experiment in an quasi-uniform field, it was found that the optimal $N_2/O_2$ mixing ratio which breakdown voltage and surface flashover voltage were the highest was 70/30 and that the pressure dependence on the breakdown voltage was higher than that of the surface flashover voltage in the Dry $Air/O_2$ and the $N_2/O_2$ mixture gas. The mixing ratio (70/30) and the tendency of the pressure dependence were described in detail based on physical factors (impact ionization coefficient, electron attachment coefficient, secondary electron emission coefficient) involved in discharge mechanism and a electron source, respectively. In addition, the performance insulation and the economic feasibility of the Dry $Air/O_2$ and the $N_2/O_2$ mixture gas were discussed so that Dry $Air/O_2$ mixture gaswas more suitable than $N_2/O_2$ mixture gas to the $SF_6$ alternative.
Dry Air/O₂ 혼합가스의 혼합비에 따른 절연파괴 및 연면방전 특성 연구
석정후(Jeong-Hoo Seok),백종현(Jong-Hyun Beak),임동영(Dong-Young Lim),배성우(Sungwoo Bae),김기채(Ki-Chai Kim),박원주(Won-Zoo Park) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.6
This paper presents the discharge characteristics and economic feasibility of a Dry Air/O₂ and a N₂/O₂ mixture gas in order to review SF6 alternative. From AC discharge experiment in an quasi-uniform field, it was found that the optimal N₂/O₂ mixing ratio which breakdown voltage and surface flashover voltage were the highest was 70/30 and that the pressure dependence on the breakdown voltage was higher than that of the surface flashover voltage in the Dry Air/O₂ and the N₂/O₂ mixture gas. The mixing ratio (70/30) and the tendency of the pressure dependence were described in detail based on physical factors (impact ionization coefficient, electron attachment coefficient, secondary electron emission coefficient) involved in discharge mechanism and a electron source, respectively. In addition, the performance insulation and the economic feasibility of the Dry Air/O₂ and the N₂/O₂ mixture gas were discussed so that Dry Air/O₂ mixture gaswas more suitable than N₂/O₂ mixture gas to the SF6 alternative.
개선된 Dry Air와 SF<SUB>6</SUB>의 혼합비에 따른 절연파괴 특성 연구
석정후(Jeong-Hoo Seok),백종현(Jong-Hyun Beak),임동영(Dong-Young Lim),배성우(Sungwoo Bae),김기채(Ki-Chai Kim),박원주(Won-Zoo Park) 한국조명·전기설비학회 2016 조명·전기설비학회논문지 Vol.30 No.3
It is very desirable that a mixture gas possessing excellent insulation performance is suggested for insulation on increasing high voltage. This paper proposes a SF<SUB>6</SUB> mixture gas based on the factors including dielectric strength, environmental impact and economic feasibility of manufacture for the insulation in eco-friendly power equipment. A suitable-SF<SUB>6</SUB> content was determined to improve the dielectric strength in N₂ and Dry Air. The examination results of the factors revealed that a SF<SUB>6</SUB>/Dry Air mixture gas possessing the SF<SUB>6</SUB> content was more appropriate than a SF<SUB>6</SUB>/N₂ mixture gas to the eco-friendly power equipment. In addition to the selection of the suitable SF<SUB>6</SUB> mixture gas, insulation characteristics as a function of SF<SUB>6</SUB> content were described from electron-detachment mechanism.