• Proceedings of the Optical Society of Korea Conference
• /
• 1988.06a
• /
• pp.37-40
• /
• 1988

보조전극을 사용하여 전기방전을 궤환 조절하여 연속출력 탄산가스 출력을 안정화하였다. 보조전극은 양극과 접지되어 있는 음극사이에서 음그근처에 설치하였으며 레이저 출력을 HgCdTe-detector로 측정하여 레이저 출력의 요동에 따라 보조전극에 인가되는 전압이 변화되도록 하였다. 보조전극을 사용하여 레이저 출력을 안정화시킨 결과 레이저 출력의 요동은 안정화하지 않았을때의 레이저출력 요동의 1/10 이하로 감소하였다.

• LP가스
• /
• s.95
• /
• pp.27-30
• /
• 2005

에너지및자원사업특별회계법 제5조제2항제2호의 규정에 의거 2005년도 에너지및자원사업특별회계로부터 보조되는 가스안전기기보급지원사업의 운영지침을 다음과 같이 공고합니다.

• Proceedings of the KWS Conference
• /
• 1994.10a
• /
• pp.27-28
• /
• 1994

• Proceedings of the KWS Conference
• /
• 2001.05a
• /
• pp.176-177
• /
• 2001

• Journal of the KSME
• /
• v.54 no.8
• /
• pp.43-46
• /
• 2014

이 글에서는 국내 유일의 가스터빈 제작 업체인 두산중공업의 가스터빈 사업 소개 및 보조 기기시스템의 핵심인 윤활 시스템 국산화에 대한 내용을 소개하고자 한다.

• Journal of the Korean Society of Manufacturing Process Engineers
• /
• v.9 no.5
• /
• pp.14-19
• /
• 2010

A computational study was carried out to analyze the characteristics of supersonic (Mach 2.0) coaxial/off-axis jet's impingements on a slanted kerf surface in laser machining. The effects of various parameters such as gas pressure, distance between nozzle exit and kerf edge surface, and application of off-axis nozzles on the impingement phenomena of the assist-gas on kerf surface were observed. The present study showed that simply increasing the assist-gas pressure for coaxial supersonic nozzle was not effective to alleviate the strength of flow separation on kerf surface. It also presented the optimized operating condition of the coaxial nozzle to have the highest skin friction values over kerf surface.

• Journal of the Korean Society for Precision Engineering
• /
• v.12 no.3
• /
• pp.15-22
• /
• 1995

This paper presents the effects of assistant gas pressure on laser cutting. To investigate the effects of assistant gas pressure, pressure measuring system was constructed with good handling and precision at low price. The measured results discussed compare with that of laser cutting of STS304. The assistant gas pressure varied with the variation of distance between nozzle and workpiece. The peak pressure existed at some distance and could be known by using the deviced pressure measuring system. The higher assistant gas pressure helps to remove the dross and the exothermic energy out of the material. The quantity of dross beneath the workpiece decreases and the kerf width narrows at measured peak pressure.

• Proceedings of the Materials Research Society of Korea Conference
• /
• 1999.11a
• /
• pp.195-195
• /
• 1999

• 월간 기계설비
• /
• no.8 s.205
• /
• pp.53-53
• /
• 2007

한국가스안전공사는 하반기부터 신 규격 PE배관은 4열 보조선(검정색) 표시 배관 사용을 원칙으로 하되, 4열 보조선이 없는 신 규격 PE배관을 사용할 경우 로케팅와이어를 따라 길이방향으로 100% 검정색 PE Tape를 1열로 부착할 것을 권고했다. 한국가스안전공사의 이같은 조치는 지난 2006년 12월 1일부터 PE배관 KS규격(KSM 3514)이 ISO규격을 인용한 신 KS규격으로 변경됨에 따라 신·구 규격 PE배관 상호 접합시 안전성 확보방안이 요구됨에 따른 것이다.

• Journal of the Korean Institute of Gas
• /
• v.10 no.4 s.33
• /
• pp.17-22
• /
• 2006

Both of district heating(DH) system and natural gas(NG) supply system have benefits in clean energy supply and having energy efficiency and savings. The issue of duplicate investment and supply requirement of only for cook occur several conflicts such as destruction of the Beneficiary Pays Principle and Cross Subsidization, etc. Under the circumstance, the purposes of this research are to consider several issues of cross subsidization in NG and DH industries and to present the following alternatives for resolving related problems. First of all, a charging mechanism in the energy cost must be improved so as to maintain the positive relation between cost and benefit. That is, the beneficiary-pay principle must be strictly applied. Secondly, the extended supply of DH through HOB(Heat Only Boiler) must be strictly limited. Finally, we need to improve efficiency for the benefit of market participants.