http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
LNG선 Ballast Tank Mud Flushing System의 최적설계
박상협,송유석,김영복,Park, Sang Hyeop,Song, Yoo Seok,Kim, Young Bok 대한기계학회 2016 대한기계학회 논문집. Transactions of the KSME. C, 산업기술과 혁신 Vol.4 No.2
LNG선의 발라스트 탱크에 해수를 유입할 때 해수에 부유하고 있는 해저면의 머드 입자가 탱크 안으로 유입되고 탱크내에 침전되는 문제가 발생한다. 탱크에서 해수를 배출 할 때에 침전된 머드를 함께 제거할 수 있도록 발라스트 탱크 내에 머드 플러싱 시스템을 적용하였다. 본 연구에서는 플러싱 시스템의 머드 제거 효과를 평가하기 위해 입자 크기 분석기를 통해 머드의 입자 크기를 측정 하였으며, 입자 크기와 전단 응력의 관계를 바탕으로 수치해석을 통해 머드의 부유 성능을 평가하였다. 탱크내 머드 플러싱 배관 시스템을 최적화하여 탱크내 머드 부유 성능을 극대화하였다. During ballast of a LNG carrier, the mud at the sea floor can enter the tanks together with the ballast water if the LNG terminal is located at shallow water region. In order to remove the mud deposited on the tank floor during deballasting, the mud flushing system in the ballast tanks is applied. In this study, various analyses to conform the efficiency in the mud removal are performed. In order to design the mud flushing system, the particle size of the mud is measured by particle size analyzer. Flushing performance is evaluated by numerical analysis. From the results of numerical analysis including flow field and piping system network, the optimized flushing system is determined.
HRSG의 start-up/shutdown curve에 따른 시스템 동특성 해석
차훈(Cha Hoon),김규종(Kim Kyu Jong),송유석(Song Yoo Seok),김정래(Kim Jung Rae) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
HRSG(Heat Recovery Steam Generator) is one of the main components of CCPP(Combined Cycle Power Plant) and should be operated by appropriate procedure in case of start-up or shutdown. If an abnormal operation of HRSG occurs, the problem including fatigue failure can arises. Therefore, the performance of HRSG by dynamic analysis should be investigated. In this study, dynamic analysis for the HRSG system was carried out by commercial software, ProTRAX. The main variable for the analysis was the change of temperature and mass flow rate from gas turbine according to start-up(cold/warm/hot) and shutdown curve to dynamic analysis. The results showed that the exhaust gas condition of gas turbine was a main factor for performance of HRSG such as flow rate and temperature of main steam from final superheater.