Abstract: The gasification process is the core of the marine fuel gas supply system, whose simulation research is critical for ensuring the rational design of the gasification system and the safe operation of the fuel gas supply system.The optimization of gasification scheme was carried out based on the high- and low-pressure fuel gas supply system of a large LNG-powered vessel. A method for simulating the gasification process using Aspen HYSYS software under the maximum operating condition was proposed, to verify the rationality of the gasification scheme. And, the gasification process under various typical operating conditions was then simulated and validated. The influence of LNG methane concentration and inlet pressure on the design of the gasification scheme was explored. It was found that the heat duty of the vaporizer increased with LNG methane concentration and decreased with inlet pressure. This provides a theoretical basis for the optimal design of the gasification process in marine fuel gas supply systems and contributes to the safe and stable operation of dual-fuel power systems.

Key words: marine fuel gas supply system, gasification process, process simulation, HYSYS, vaporizer

摘要： 气化流程是船用供气系统工艺的核心流程,其仿真研究是验证气化系统设计合理性、保障供气系统安全运行的关键。该文基于某大型液化天然气（liquefied natural gas,LNG）动力船舶的高低压供气系统,完成了气化方案的优化设计。该方案以船舶最大运行工况为依据,提出了利用Aspen HYSYS软件模拟气化流程以验证方案合理性的方法,并对不同典型工况下的气化流程进行了仿真验证;探究了LNG甲烷浓度、进口压力对气化方案设计的影响,发现气化器所需换热量随LNG甲烷浓度增加而增加,随进口压力增加而降低。该研究为船用供气系统气化流程的优化设计提供了理论依据,对保障双燃料动力系统的安全稳定运行具有参考价值。

关键词: 船用供气系统, 气化流程, 流程模拟, HYSYS, 气化器