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LNG冷能回收及梯级利用研究进展
李俊,陈煜
0
(上海工程技术大学机械与汽车工程学院能源与动力工程系)
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、CO2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。
关键词:  液化天然气  冷能  梯级利用  温位区间利用
DOI:
投稿时间:2021-07-22修订日期:2021-10-01
基金项目:
Research Progress of Cold Energy Recovery and Cascade Utilization of LNG
Li Jun,Chen Yu
(Department of Energy and Power Engineering, School of Mechanical and Automotive Engineering, Shanghai University of Engineering and Science)
Abstract:
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, CO2 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.
Key words:  liquefied natural gas  cold energy  cascade utilization  temperature range of utilization

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