LNG动力船燃料舱动态保压模拟
Dynamic pressure control simulation of LNG fuel tanks on LNG-powered vessels
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- 引用格式:
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徐常安,张辉,沈鼎盛,朱建鲁,张树森,姜庆华.LNG动力船燃料舱动态保压模拟[J].天然气与石油,2026,44(2):1-8.doi:10.3969/j.issn.1006-5539.2026.02.001
Xu Chang'an, Zhang Hui, Shen Dingsheng, Zhu Jianlu, Zhang Shusen, Jiang Qinghua.Dynamic pressure control simulation of LNG fuel tanks on LNG-powered vessels[J].Natural Gas and Oil,2026,44(2):1-8.doi:10.3969/j.issn.1006-5539.2026.02.001
- DOI:
- 10.3969/j.issn.1006-5539.2026.02.001
- 作者:
- 徐常安1 张辉1 沈鼎盛2 朱建鲁3 张树森3 姜庆华4
Xu Chang'an1, Zhang Hui1, Shen Dingsheng2, Zhu Jianlu3, Zhang Shusen3, Jiang Qinghua4
- 作者单位:
- 1. 招商局海洋装备研究院有限公司, 广东 深圳 518067; 2. 招商局重工(江苏)有限公司, 江苏 南通 226005; 3. 中国石油大学(华东)储运与建筑工程学院学院, 山东 青岛 266580; 4. 东营市建筑工程质量检测站有限公司, 山东 东营 257000
1. China Merchants Marine Equipment Research Institute Co., Ltd., Shenzhen, Guangdong, 518067, China; 2. China Merchants Heavy Industry(Jiangsu) Co., Ltd., Nantong, Jiangsu, 226005, China; 3. College of Pipeline and Civil Engineering, China University of Petroleum(East China), Qingdao, Shandong, 266580, China 4. Dongying Construction Engineering Quality Inspection Station Co., Ltd., Dongying, Shandong, 257000, China
- 关键词:
- LNG动力船;航程模拟;动态模拟;BOG管理;压力控制
LNG-powered vessel; Voyage simulation; Dynamic simulation; BOG management; Pressure control
- 摘要:
在全球碳中和目标的驱动下,液化天然气(Liquefied Natural Gas,LNG)凭借高热值与低碳排放特性成为船舶领域的重要替代燃料;然而,LNG在储存与运输过程中因自然蒸发产生的自然蒸发天然气(Natural Boil-off Gas,NBOG)会导致舱内压力持续升高,带来安全隐患,因此对舱压变化的精确预测与闪蒸气(Boil-off Gas,BOG)处理策略的优化具有重要意义。以6 000 m3双舱C型LNG动力船为研究对象,基于典型往返航线,系统模拟了压载、满载、进出港及装卸等工况下的燃料消耗与舱压动态变化。基于Peng-Robinson立方型状态方程建立LNG蒸发热力学模型,并通过MATLAB实现燃料供给与压力控制的联动仿真。结果表明,舱内压力在蒸发阶段呈先升后降规律,当舱内压力达到临界值时,再液化系统自动介入并有效抑制压力增长,满载航行较压载航行,LNG消耗速率在 9.5节和11.0节航速下分别提高14.0%与25.3%;当舱内压力＞0.208 MPa触发BOG替代供能后,LNG消耗速率降低19.5%。研究表明,分阶段压力控制与燃料动态切换策略能够在保障安全的同时有效提升燃料利用效率,为LNG动力船优化运营提供理论依据与技术参考。
Driven by global carbon neutrality goals, Liquefied Natural Gas(LNG) has emerged as a key alternative fuel in the maritime sector owing to its high calorific value and low carbon emissions. However, Natural Boil-off Gas(NBOG) generated by natural evaporation during LNG storage and transportation causes continuous pressure buildup in fuel tanks, posing safety risks. Therefore, accurate prediction of tank pressure variations and optimization of Boil-off Gas(BOG) management strategies are of significant importance. A 6 000 m3 Type-C twin-tank LNG-powered vessel is taken as the research object. Based on a representative round-trip route, fuel consumption and tank pressure dynamics under typical operating conditions, including ballast voyage, laden voyage, port entry/departure, and cargo loading/unloading, are systematically simulated. A thermodynamic evaporation model is developed based on the Peng-Robinson equation of state, and a coupled simulation of fuel supply and pressure control is implemented in MATLAB. Results indicate that tank pressure follows a rise-then-fall pattern during the evaporation phase. When tank pressure reaches the critical threshold, the reliquefaction system automatically intervenes to effectively suppress further pressure growth. Compared with ballast voyages, LNG consumption rates during laden voyages increase by 14.0% and 25.3% at speeds of 9.5 and 11.0 knots, respectively. When tank pressure exceeds 0.208 MPa, BOG is triggered to replace LNG as auxiliary fuel supply, reducing the LNG consumption rate by 19.5%. The findings demonstrate that phased pressure control strategy combined with dynamic fuel switching can enhance fuel utilization efficiency while ensuring operational safety, providing theoretical basis and technical reference for optimized operation of LNG-powered vessels.
