船舶深冷BOG再液化工艺参数影响分析  

he influence analysis of process parameters for deep-cooling BOG re-liquefaction of LNG carrier

作　　者：李恩道[1] 程昊[1] 刘淼儿[1] 邓晨庆 Li Endao;Cheng Hao;Liu Miaoer;Deng Chenqing(CN00C Gas and Power Group Co.Ltd,Beijing 100028,China)

机构地区：[1]中海石油气电集团有限责任公司,北京100028

出　　处：《低温与超导》2024年第3期96-101,共6页Cryogenics and Superconductivity

基　　金：国家自然科学基金(U21B2085)资助。

摘　　要：近年来一种小型船用深冷BOG(Boil-Off-Gas)再液化装置受到市场的青睐,成为LNG运输船的主流配置。本文采用HYSYS软件对深冷BOG再液化工艺进行了多工况模拟,以系统最小功耗为评价指标,分析了冷剂氮氦组分配比、冷剂膨胀前后压力等工艺参数对系统功耗的影响。结果表明:膨胀后压力小于9 bar时,氮氦气冷剂最优配比约为50%:50%;提高冷剂系统操作压力和增加氦气组分含量有利于降低系统能耗;高压力下,氦气组分越多,能耗越低;与现有的液化装置相比,优化后的液化装置能耗低于800 kWh/t,为再液化装置研制提供理论参考。In recent years,a small deep-cooling BOG re-liquefaction device has been favored by the market and has become one of the mainstream configurations of LNG carriers.HYSYS software was used to simulate the cryogenic re-liquefaction process in multiple cases.The minimum power consumption of the system was used as the evaluation index.The influence of the nitrogen and heliumre frigerant proportion and the pressure before and after expansion of the refrigerant on the power consumption was discussed.The results show that the optimal nitrogen helium refrigerant distribution ratio is about 50%:50%when the pressure after expansion is less than 9 bar.Increasing the operating pressure of the refrigerant system and the helium content is beneficial for reducing system power consumption;when the system pressure is high,the more helium components there is,the lower the power consumption.Compared with existing devices,the energy consumption of the optimized liquefaction devices is less than 800 kWh/t,which providing guidance for the development of re-liquefaction unit.

关 键 词：LNG运输船 BOG 再液化 深冷装置 氮氦混合冷剂 

分 类 号：U473.24[机械工程—车辆工程]