http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
LNG 저장탱크 내조용 9% Ni강의 GTAW 용접열영향부내 파괴인성 변화 평가
김영균(Young-Kyun Kim),양영철(Young-Chul Yang),양영명(Yong-Myung Yang),김재훈(Jae-Hoon Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
To confirm the safety perfomance of LNG storage tank, the change in fracture toughness and within the X-grooved weld heat-affected zone (HAZ) of newly developed 9% Ni steel, which was GTAW welded, was investigated. The weld metal specimens were prepared by taking the same weld procedure applied in actual LNG storage tank inner shell. All the tests were performed in the temperature ranging from room temperature to -162℃ The crack initiation fracture toughness was evaluated by performing the crack tip opening displacement (CTOD) tests. The lowest CTOD values were obtained at the region of W.M due to the effect of weld.
스트레인 게이지를 이용한 Pilot LNG 저장탱크 멤브레인 실 변형 거동 측정
김영균(Young Kyun Kim),윤인수(Byoung Taek Oh),오병택(Seong Ho Hong),홍성호(Young Myung Yang),양영명(Ihn Soo Yoon) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
Korea Gas Corp. has developed the design technology of the LNG storage tank. The membrane to be applied inside of the LNG storage tank is provided with corrugations to absorb thermal contraction and expansion caused by LNG temperature changes. It is very important to measure their thermal strains under LNG temperatures by analytical and experimental stress analysis of the membrane. We have developed a stress measurement system using strain gages and measured the strain during cooldown and storing the LNG. We also analyzed the measured data by comparison with the FEM data. On the basis of these results, we could design and assure the application of the Kogas Membrane to large scale LNG storage.
장기 운전 환경에서의 지하식 LNG저장탱크 온도 분포 및 변화 특성 분석
김영균(Kim Young kyun),김지훈(Kim Ji Hun),이강원(Lee Kang Won),양영명(Yang Young Myung) 대한토목학회 2007 대한토목학회논문집 A Vol.27 No.2A
지하식 LNG 저장탱크는 루프 외의 전체 구조가 지표면 아래에 건설되며 토압과 지하수압을 지지하는 지중연속벽을 가지고 있어 안정적인 조건에서 LNG를 저장한다. 콘크리트 탱크 내에 단열재를 설치하였으나 장기간 운전에 따른 초저온 LNG의 냉열 전파로 지하식 저장탱크 주변 지반까지 동결이 발생하게 된다. 본 논문에서는 LNG탱크 콘크리트 외조 및 주변 지반의 온도 분포 및 변화를 유한요소해석과 실제 측정 결과 값을 비교 분석 하였다. 설계서의 정확도를 분석하기 위하여 유한요소해석에 필요한 경계 조건 및 물성치는 실제 탱크 설계문서로부터 선택하여 적용하였다. 해석과 측정 결과 값 분석을 통해 지하식 LNG 저장탱크 콘크리트 구조 및 지반에서의 온도변화 거동을 예측 그리고 저장탱크 설계 및 기존 탱크 유지관리에 유용하게 사용할 수 있다는 것을 보였다. In-ground type LNG storage tank is constructed below the ground level except its roof, and has a slurry wall bearing soil and water pressure to store LNG in safe condition. During the long term operation, soil freezing occurs around the in-ground storage tank despite the insulation provided inside of the concrete tank due to the cryogenic temperature of LNG. This study compares the result of FE analysis and measured data to investigate the temperature distribution and variation in and outside the LNG tank. In order to validate the design documents, boundary conditions and material properties for FE analysis have been taken from the design documents for tank construction. The comparative observation between analyses and measurements has revealed that the temperature variation of concrete structure and soil is predictable and the results are applicable to designing the in-ground storage tank.
오병택(Byungtaek Oh),양영명(Young-myung Yang) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
In-ground LNG storage tanks are buried in ground except for the roof, and contact directly with soil at the outside surface of concrete structures. So, a kind of anti-freezing system should be needed to prevent the soil from freezing. A soil’s freezing heavily caused by heat transfer from cryogenic LNG might bring out serious safety problems. That’s the why the additional heating system is installed for the in-ground LNG storage tank. But, this heating system could be used as a freezing system in order to keep the freezing front when a storage tank should be needed to be repaired. The freezing front means the boundary between frozen zone and non-frozen zone. The freezing front should be located near the outside wall of the storage tank to prohibit the underground water’s permeation. In this paper, the way of keeping the freezing front will be introduced to repair the inside of the storage tank. This is a completely contrary concept against the normal operation of a storage tank.
이상규(Sanggyu Lee),이철구(Chulgu Lee),양영명(Young-myung Yang) 한국가스학회 2009 한국가스학회 학술대회논문집 Vol.2009 No.4
천연가스가 가스전에서부터 사용자에게 전달되는 방법은, 대단위 배관으로 전달하는 PNG (Pipeline Natural Gas) 방식과 액화해서 전달하는 LNG (Liquified Natural Gas) 방식으로 크게 분류된다. LNG 방식으로 천연가스를 이송할 경우, 천연가스를 약 -162 ℃로 액화해야 한다. 천연가스 액화플랜트는 크게 전처리설비, 중질분 분리설비, 액화설비, 그리고 저장설비로 분리되는데, 그중에 액화설비는 공정 형태에 따라, C3MR, Cascade, DMR 등 여러 공정으로 분류된다. 본 논문에서는 액화공정 중 세계적으로 가장 널리 적용된 C3MR공정에 대한 Simulation을 구성하고 액화 용량 변화에 따른 특성에 대한 연구결과를 설명하였다. There are two ways in the transportation methods of the natural gas from the gas wells to the end users: first, the PNG (Pipeline Natural Gas) method delivering the natural gas through the large-scale pipelines, and the second, the LNG (Liquified Natural Gas) method delivering the LNG after the liquefaction process. When using the LNG method to transport the natural gas, it is essential to liquefy the natural gas to -162℃. The natural gas liquefaction plant consists of a pre-processing process, fractionation process, liquefaction process, and storage tank. The natural gas liquefaction processes are classified into several kinds such as C3MR, Cascade, DMR and others. In this study, it is explained that the simulation study of the C3MR process which is applied worldwide and how the characteristics get changed according to train capacity.