石油与天然气化工2026，Vol.55Issue(4)：26-35,10.DOI:10.3969/j.issn.1007-3426.2026.04.004
基于LNG冷能的氢液化系统分析与优化
Analysis and optimization of a hydrogen liquefaction system based on LNG cold energy
摘要
Abstract
Objective This study aims to enhance the efficiency of a hydrogen liquefaction system,recover high-temperature waste heat from the steam methane reforming(SMR)hydrogen production process,reduce CO2 emissions,and meet future energy demands.Method A hydrogen liquefaction system precooled by liquefied natural gas(LNG)cold energy and combined with a subcritical CO2 regenerative Rankine cycle was proposed to recover high-temperature waste heat from SMR and capture CO2.The influence of key parameters on the system was determined through parametric analysis.The composite curves of heat exchangers and the exergy losses of the equipment were particularly analyzed.The system was optimized based on particle swarm optimization,and its superiority was demonstrated through comparative analysis.Result The results show that the specific energy consumption of the system is 6.82 kWh/kg,the coefficient of performance is 0.195,the exergy efficiency is 59.66%,and the CO2 capture rate is 60.15%.The total exergy loss of the system is 1071.28 kW,mainly distributed in steam turbines and heat exchangers.Conclusion The hydrogen liquefaction system with waste heat recovery has a specific energy consumption that is 0.66 kWh/kg lower,while the exergy efficiency is 3.53 percentage points higher and the energy efficiency ratio is 13.37%higher than that of the conventional system.The research results can serve as a reference for future hydrogen liquefaction processes.关键词
液化天然气/氢液化/㶲分析/蒸汽甲烷重整/梯级利用Key words
LNG/hydrogen liquefaction/exergy analysis/steam methane reforming/cascade utilization引用本文复制引用
侯君卫,王长顺,孙小虎,何亚彬..基于LNG冷能的氢液化系统分析与优化[J].石油与天然气化工,2026,55(4):26-35,10.基金项目
辽宁省科学技术厅"揭榜挂帅"科技攻关专项"煤矿气动定向钻进排渣及防灭火一体化智能制氮装备及技术"(2023JH1/10400016) （2023JH1/10400016）
