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Abstract The liquefaction process is regarded as primary among all topside systems in liquefied natural gas floating production storage and offloading (LNG FPSO) applications. The liquefaction process, which typically accounts for 70% of the capital cost of topside process systems and 30 to 40% of the overall cost of LNG FPSO plants, condenses the separated and pre-treated natural gas into LNG. The volume of liquid occupies about 1/600th the volume of the natural gas. The cycles in the liquefaction process consist of seven main pieces of equipment: compressor, sea water cooler, expansion valve, heat exchanger, phase separator, tee, and common header. Many different types of liquefaction cycles are determined according to their respective synthesis and optimized operating conditions. This study first proposes the generic liquefaction model to represent various types of liquefaction cycles. Twenty-seven feasible liquefaction configurations derived from the generic model are selected to perform the most effective synthesis for the optimization of the liquefaction cycle. With the minimum amount of power required for the compressors, the optimized liquefaction cycle then is proposed by obtaining optimal operating conditions in 27 cases. The optimized liquefaction cycle is compared with the dual mixed refrigerant (DMR) cycle, which is considered for the application of LNG FPSO. Finally, the results show that the amount of power required for the operating conditions is decreased by 1.2% compared with that of the DMR cycle.
Publication Date 2012-06-17

Ji-Hyun Hwang, Nam-Kug Ku, Joon-Chae Lee, Myung-Il Roh, Kyu-Yeul Lee, "Optimal Synthesis of LNG FPSO Liquefaction Cycles", Proceedings of ISOPE(International Society of Offshore and Polar Engineers) 2012, Rhodes, Greece, pp. 927-935, 2012.06.17-22


List of Articles
번호 분류 제목 Publication Date
120 International Conference Sol Ha, Ki-Su Kim, Seung-Ho Ham, Myung-Il Roh, Nam-Kug Ku, "Co-simulation of Multibody System Dynamics and Moving Particle Semi-implicit Method for Heavy Load Lifting Operations in Shipyards", Proceedings of ISOPE 2015, Hawaii, USA, 2015.06.21-26 file 2015-06-25
119 International Conference Seung-Min Lee, Myung-Il Roh, Ki-Su Kim, Seung-Ho Ham, "Optimization of Tugboats Operation for Transporting an Offshore Floating Crane in Environmental Disturbance", International Conference on Mechanical Design and Engineering, 2017.01.20-22 file 2017-01-21
118 International Conference Seung-Ho Ham, Myung-Il Roh, Xing Li, Luman Zhao, "Collaborative Simulation of the Block Turn-over Operation Based on Multibody System Dynamics and Virtual Reality", Proceedings of SUTTC 2015, Bejing, China, 2015.10.23-25 file 2015-10-24
117 International Conference Seung-Ho Ham, Myung-Il Roh, Luman Zhao, Sol Ha, "Drillship Simulation Based on the Integration of Motion Analysis, Virtual Reality, and Motion Platform", Proceedings of TEAM 2015, Vladivostok, Russia, 2015.10.12-15 file 2015-10-13
116 International Conference Seung-Ho Ham, Myung-Il Roh, Ki-Su Kim, Luman Zhao, Sol Ha, "Integrated Simulation Framework Based on Multibody Dynamics, Realistic Visualization, and Hardware for Shipbuilding Production and Offshore Installation", Proceedings of MARSIM 2015, UK file 2015-09-10
115 International Conference Seung-Ho Ham, Myung-Il Roh, Jong-Hyuk Lee, Sung-Jun Lee, "Multi-purpose Simulator for Ships and Offshore Structure", Proceedings of ACDDE 2018, Okinawa, Japan, 2018.11.1-3 file 2018-11-01
114 International Conference Seung-Ho Ham, Myung-Il Roh, Hye-Won Lee, Jeong-Woo Hong, "Multi-physics Simulation Framework for Design and Production of Ships and Offshore Plants", Proceedings of PRADS 2016, Copenhagen, Denmark, 2016.09.04-09.08 file 2016-09-07
113 International Conference Seung-Ho Ham, Myung-Il Roh, Hye-Won Lee, Dong-Hoon Jeong, "Physics-based Simulation Considering Collision During Production and Installation of Ships and Offshore Plants", Proceedings of ICCGS 2016, Ulsan, Korea, 2016.06.15-18 file 2016-06-16
112 International Conference Seung-Ho Ham, Myung-Il Roh, Hye-Won Lee, "Physics-based Simulation and Its Applications for Design, Production, and Installation of Ships and Offshore Structures", Proceedings of SUTTC 2017, Haikou, China, pp. 1, 2017.11.23-24 file 2017-11-24
111 International Conference Seung-Ho Ham, Myung-Il Roh, Hye-Won Lee, "Lifting Design for Ships and Offshore Structures Using Non-interpenetration Constraints and Flexible Multibody System Dynamics", Proceedings of ISOPE 2018, Sapporo, Japan, pp. 910-913, 2018.06.10-15 file 2018-06-11
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