为保障LNG动力船在锚地采用船对船方式冷舱作业的安全,需计算分析冷舱作业时LNG泄漏扩散的范围。选取20000 m 3LNG加注船和15000 TEU双燃料集装箱船为分析对象,针对气相/液相软管发生破裂泄漏、加注船/受注船法兰接头处发生泄漏两处高...为保障LNG动力船在锚地采用船对船方式冷舱作业的安全,需计算分析冷舱作业时LNG泄漏扩散的范围。选取20000 m 3LNG加注船和15000 TEU双燃料集装箱船为分析对象,针对气相/液相软管发生破裂泄漏、加注船/受注船法兰接头处发生泄漏两处高风险场景,采用三维流体仿真软件FLACS对LNG泄漏后扩散波及范围进行模拟分析,对比分析不同泄漏位置对LNG泄漏扩散的影响。结果表明,气相软管破裂形成的可燃蒸气云覆盖范围较小,基本不会对船舶造成影响;加注船法兰接头处发生的液相泄漏形成的可燃蒸气云会大面积积聚在加注船船艏,应采取安全措施避免此类泄漏;法兰接头处发生液相泄漏产生的后果较软管破裂更为严重,并结合上述分析结果,确定锚地冷舱作业时的安全间距,为行业实施相关作业提供参考依据和安全保障。展开更多
舟山市鱼山绿色石化基地是我国七大石化基地的重要组成部分,也是打造全国首个绿色发展标杆的石化基地,液化天然气(LNG)码头建设对基地发展十分重要。通过挖掘水域优势,将LNG船舶移动安全区设定为前1 n mile、后0.5 n mile、左右各1倍船...舟山市鱼山绿色石化基地是我国七大石化基地的重要组成部分,也是打造全国首个绿色发展标杆的石化基地,液化天然气(LNG)码头建设对基地发展十分重要。通过挖掘水域优势,将LNG船舶移动安全区设定为前1 n mile、后0.5 n mile、左右各1倍船长(约300 m),给对向船舶预留了约360 m宽的通道,解决了LNG船舶航行过程中对向封控的问题。通过使用代入法,分区段定量分析LNG船舶进出港过程中需要协调避让的船舶数量,形成LNG码头建设后的交通场景。通过对沪舟通道岱山北航道桥、LNG船舶和周围水域的三维建模,采用操纵试验手段,得出LNG专用航道转向点与跨海大桥的安全间距不宜小于6倍船长。展开更多
研制可换箱的移动式20 ft LNG船用燃料罐箱,实现可换箱的“罐箱燃料电池”模式。主要介绍供液系统的组成、关键技术参数和营运后的优缺点。整体系统中LNG船用燃料罐箱和供气冷箱分别独立设计,实现了LNG罐箱的独立运行、容积的最大化。LN...研制可换箱的移动式20 ft LNG船用燃料罐箱,实现可换箱的“罐箱燃料电池”模式。主要介绍供液系统的组成、关键技术参数和营运后的优缺点。整体系统中LNG船用燃料罐箱和供气冷箱分别独立设计,实现了LNG罐箱的独立运行、容积的最大化。LNG罐箱为船舶提供清洁的动力燃料,推进绿色智能航运的发展。展开更多
Investigating how COVID-19 has influenced Liquefied Natural Gas(LNG)is significant for benefits evaluation for shipping companies and safety management for sustainable LNG shipping in case of accidents.This paper prop...Investigating how COVID-19 has influenced Liquefied Natural Gas(LNG)is significant for benefits evaluation for shipping companies and safety management for sustainable LNG shipping in case of accidents.This paper proposes a quantitative method to model the impact of COVID-19 on global LNG shipping efficiency based on the spatiotemporal characteristics of behavior mining for LNG ships.The time cost for LNG carriers serving inside LNG terminals is calculated based on the status of LNG carriers specifically based on arrival and departure times.Then,the time series analysis method is employed to extract the statistical characteristics of the COVID-19 severity index and time cost for LNG carriers inside LNG terminals.Finally,the impact of COVID-19 on global LNG shipping is explored through the Vector Autoregressive Model(VAR)combined with the sliding window.The results demonstrate that the COVID-19 pandemic has a certain influence on the service time for LNG carriers with time lags worldwide.The impact is spatial heterogeneity on a large scale or small scale across global,countries,and trading terminals.It can be used for decision-making in energy safety and LNG intelligent shipping management under unexpected global public health events in the future.The results provide support for intelligent decision-making for safety management under unexpected public health events,such as reducing the seafarer’s explosion to risk events and taking efficient actions to ensure the shipping flow to avoid the energy supply shortage.展开更多
文摘为保障LNG动力船在锚地采用船对船方式冷舱作业的安全,需计算分析冷舱作业时LNG泄漏扩散的范围。选取20000 m 3LNG加注船和15000 TEU双燃料集装箱船为分析对象,针对气相/液相软管发生破裂泄漏、加注船/受注船法兰接头处发生泄漏两处高风险场景,采用三维流体仿真软件FLACS对LNG泄漏后扩散波及范围进行模拟分析,对比分析不同泄漏位置对LNG泄漏扩散的影响。结果表明,气相软管破裂形成的可燃蒸气云覆盖范围较小,基本不会对船舶造成影响;加注船法兰接头处发生的液相泄漏形成的可燃蒸气云会大面积积聚在加注船船艏,应采取安全措施避免此类泄漏;法兰接头处发生液相泄漏产生的后果较软管破裂更为严重,并结合上述分析结果,确定锚地冷舱作业时的安全间距,为行业实施相关作业提供参考依据和安全保障。
文摘舟山市鱼山绿色石化基地是我国七大石化基地的重要组成部分,也是打造全国首个绿色发展标杆的石化基地,液化天然气(LNG)码头建设对基地发展十分重要。通过挖掘水域优势,将LNG船舶移动安全区设定为前1 n mile、后0.5 n mile、左右各1倍船长(约300 m),给对向船舶预留了约360 m宽的通道,解决了LNG船舶航行过程中对向封控的问题。通过使用代入法,分区段定量分析LNG船舶进出港过程中需要协调避让的船舶数量,形成LNG码头建设后的交通场景。通过对沪舟通道岱山北航道桥、LNG船舶和周围水域的三维建模,采用操纵试验手段,得出LNG专用航道转向点与跨海大桥的安全间距不宜小于6倍船长。
基金National Natural Science Foundation of China(No.42101429 and No.42371415)Young Elite Scientists Sponsorship Program by China Association for Science and Technology(CAST)(No.YESS20220491)+2 种基金Project of Education Department of Hainan Province(No.Hnjg2024-284)Open Fund of State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University(No.21S04)National Key Research and Development Program of China(No.2022YFC3302703).
文摘Investigating how COVID-19 has influenced Liquefied Natural Gas(LNG)is significant for benefits evaluation for shipping companies and safety management for sustainable LNG shipping in case of accidents.This paper proposes a quantitative method to model the impact of COVID-19 on global LNG shipping efficiency based on the spatiotemporal characteristics of behavior mining for LNG ships.The time cost for LNG carriers serving inside LNG terminals is calculated based on the status of LNG carriers specifically based on arrival and departure times.Then,the time series analysis method is employed to extract the statistical characteristics of the COVID-19 severity index and time cost for LNG carriers inside LNG terminals.Finally,the impact of COVID-19 on global LNG shipping is explored through the Vector Autoregressive Model(VAR)combined with the sliding window.The results demonstrate that the COVID-19 pandemic has a certain influence on the service time for LNG carriers with time lags worldwide.The impact is spatial heterogeneity on a large scale or small scale across global,countries,and trading terminals.It can be used for decision-making in energy safety and LNG intelligent shipping management under unexpected global public health events in the future.The results provide support for intelligent decision-making for safety management under unexpected public health events,such as reducing the seafarer’s explosion to risk events and taking efficient actions to ensure the shipping flow to avoid the energy supply shortage.
