摘要目的为实现LNG冷能的回收利用、氢气的绿色制取和液态储运的多重目标,提出LNG冷能发电作为电解水制氢的电力来源,同时提供氢液化用能,并辅助氢预冷的一套综合能源系统。方法使用HYSYS软件对LNG冷能发电循环及氢液化进行模拟测算,建立系统中各单元物料与电能匹配关系的数学模型,通过模型求解获得了直接膨胀、朗肯循环、联合循环3种发电方式在不同外输压力下的年液氢产量。结果LNG年接收量为300×10^(4)t时,综合能源系统液氢产量约1420~3790 t/a。结论在相同外输压力下,制氢效率相同时的联合循环发电制氢效益最明显;其他条件相同时,随外输压力的增大,制氢量呈下降趋势;同等条件下,PEM电解制氢效益优于碱性电解法。

Objective In order to achieve the multiple objectives of LNG cold energy recycling,green hydrogen production and liquid hydrogen storage and transportation,an integrated energy system which utilizes LNG cold energy to power generation as a power source for hydrogen production from electrolytic water and hydrogen liquefaction,and meanwhile LNG roles as hydrogen liquefaction pre-refrigerant is proposed.Methods The process of LNG cold energy power generation and hydrogen liquefaction by HYSYS is simulated and calculated.A mathematical model of the relationship between materials in each unit and the distribution of electric energy is established.The annual liquefied hydrogen production are obtained for three power generation modes of direct expansion,Rankine cycle and combined cycle under different export pressures by solving the model.Result When the annual LNG receiving capacity is 3 million tons,the liquid hydrogen output of the integrated energy system is about 1420-3790 tons per year.Conclusions It is found that under the same export pressure and efficiency,the hydrogen production benefit of combined cycle power generation is mostly obvious.When other conditions are same,the hydrogen production decreases with the increase of export pressure,and the benefit of PEM electrolysis is better than that of alkaline electrolysis.

作者王超 孙恒 李兆慈 徐嘉明

Wang Chao;Sun Heng;Li Zhaoci;Xu Jiaming(National Engineering Laboratory for Pipeline Safety,Beijing Key Laboratory of Urban Oil and Gas Distribution Technology,China University of Petroleum,Beijing,China)

机构地区中国石油大学(北京)油气管道输送安全国家工程实验室·城市油气输配技术北京市重点实验室

出处《石油与天然气化工》 CAS CSCD 北大核心 2022年第2期46-52,共7页

Chemical engineering of oil & gas

关键词LNG 冷能发电 制氢 氢液化 综合系统

LNG cold energy power generation hydrogen production hydrogen liquefaction integrated system

分类号TE89 [石油与天然气工程—油气储运工程] TM619 [电气工程—电力系统及自动化]