基于HYSYS的船用双燃料发动机高压供气系统仿真
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摘要
以针对某25 000 DWT LNG动力散货船设计的高压供气系统为例,采用油气系统工艺过程仿真软件Aspen HYSYS和换热器仿真单元软件Shell & Tube Exchanger对系统在典型负荷下的工艺过程进行仿真,通过仿真值与设计值的对比,对高压供气系统的设计、设备选型及供气系统性能的影响因素等进行分析。分析结果表明,高压供气系统的供气能力满足系统的设计要求,LNG高压气化/加热器的选型满足换热能力的要求且具有一定冗余。此外,高压泵增压过程带来的能量输入以及减压阀节流效应产生的燃气温度降低等影响因素应在供气系统设计中进行充分考虑。
Taking a high pressure fuel gas supply system designed for a LNG-fuelled 25 000 DWT bulk carrier as an example, simulation of the system processes under typical loads are performed by using the commercial simulation software Aspen HYSYS and Shell & Tube Exchanger. By comparing the design and the simulated values, analysis on the system design and equipment selection are carried out for the high pressure fuel gas supply system. The results show that the capacity of the high pressure fuel gas supply system can fulfill the design requirement, and the type selection of the high pressure LNG vaporizer/heater can meet the required heat exchange capability with a certain degree of redundancy. In addition, the energy input from the high pressure pump pressurization process and the gas temperature drop resulting from the throttling effect of the pressure reducing valve, which are influencing factors for the fuel gas supply system, should be fully considered in the system design.
Taking a high pressure fuel gas supply system designed for a LNG-fuelled 25 000 DWT bulk carrier as an example, simulation of the system processes under typical loads are performed by using the commercial simulation software Aspen HYSYS and Shell & Tube Exchanger. By comparing the design and the simulated values, analysis on the system design and equipment selection are carried out for the high pressure fuel gas supply system. The results show that the capacity of the high pressure fuel gas supply system can fulfill the design requirement, and the type selection of the high pressure LNG vaporizer/heater can meet the required heat exchange capability with a certain degree of redundancy. In addition, the energy input from the high pressure pump pressurization process and the gas temperature drop resulting from the throttling effect of the pressure reducing valve, which are influencing factors for the fuel gas supply system, should be fully considered in the system design.
引文
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[2]马义平,曾向明,魏海军,等.国内外船用LNG动力发动机发展现状[J].中国航海,2016,39(3):20-25.
[3]马义平,王忠诚,时继东,等.曼恩和瓦锡兰船用二冲程双燃料发动机之比较[J].船舶,2015,26(5):94-99.
[4]Winterthur Gas&Diesel Ltd.Application of WinGD X-DFEngines for LNG Fuelled Vessels[R].2017.
[5]BATTISTELLI A.Boil Off Gas Handling on LNG Fuelled Vessels with High Pressure Gas Injected Engines[D].Norway:Norwegian University of Science and Technology2015.
[6]MAN Diesel&Turbo.Cost-optimised Designs of ME-GIFuel Gas Supply Systems[R].2017.
[7]刘明辉,刘玉兰,黄家文.大功率船用发动机高压燃气供气系统[J].机电设备,2018(1):4-6.
[8]李博洋,邱力强,田东方,等.基于VLCC船LNG燃料供给系统设计[J].舰船科学技术,2015,37(12):68-71.
[9]王涛,李善从,吴璇,等.双燃料低速发动机供气系统分析[J].柴油机,2014,36(6):22-25.
[10]杨波,牛志刚.船舶LNG供气单元汽化器结构型式选择[J].船海工程,2016,45(5):6-10.
[11]石艳娟,付建民,郑晓云,等.基于HYSYS和HAZOP的工艺参数偏差模拟与后果量化[J].中国安全科学学报,2015,25(12):75-80.
[12]鹿晓斌,郭雷,曲顺利.利用HYSYS模拟计算接收站BOG蒸发量[J].化工进展,2015,34(S1):47-50.