摘要
本文在分析LNG冷能利用特点的基础上,根据“高能高用、低能低用、温度对口、梯级利用”原理,总结了LNG冷能用于发电、空气分离、海水淡化、CO_(2)捕获和低温冷库等单元利用的工艺方法、温位区间、工质选择以及优缺点,对比了现有的LNG冷能梯级利用工艺温度范围,以实现温位的良好匹配。并分别针对大型LNG气化站、小型LNG气化站和大型远洋LNG船舶,给出LNG冷能梯级利用的具体方案。
In this study,the amount and grade of cold energy in liquefied natural gas(LNG)were analyzed.According to the principles of"high-grade-demand with high-grade-energy,low-grade-demand with low-grade-energy,temperature matching,and cascade utilization",LNG cold energy can be used in power generation,air separation,seawater desalination,CO_(2) capture,and low-temperature cold storage,and the process methods,temperature range of utilization,working fluid properties,and advantages and disadvantages of LNG cold energy were discussed.The temperature ranges of existing LNG cold energy cascade utilization processes were compared to achieve more suitable temperature level matching.Specific schemes for cascade utilization of LNG cold energy were provided for large LNG gasification stations,small LNG gasification stations,and large ocean-going LNG ships.
作者
李俊
陈煜
Li Jun;Chen Yu(Department of Energy and Power Engineering, School of Mechanical and Automotive Engineering, Shanghai University of Engineering and Science, Shanghai, 201620, China)
出处
《制冷学报》
CAS
CSCD
北大核心
2022年第2期1-12,共12页
Journal of Refrigeration
关键词
液化天然气
冷能
梯级利用
温位区间利用
liquefied natural gas
cold energy
cascade utilization
temperature range of utilization
