摘要
氢气液化所需温度远低于天然气,需要设置更繁琐的深冷环节,液化流程复杂、占地面积大、投资成本高。超声速膨胀液化是一种新兴的气体液化分离技术,具有流程密闭、节能环保、成本低等优势。因此,提出将超声速膨胀液化技术引入氢气液化领域,并且为探究其可行性,基于流体力学计算软件FLUENT中的SIMPLE算法和k-ω湍流模型,采用Gyarmathy液滴生长模型,研究了氢气在不同入口压力(1.05 MPa、1.10 MPa、1.15 MPa)条件下的超声速流动与凝结特性。结果表明,氢气高速膨胀引起的低温效应将使氢气自发凝结,导致在短距离内快速形成液滴,证实了超声速氢气液化技术的可行性;氢气入口压力的提高,可有效增加氢气在Laval喷管入口的过冷度,从而使得气体凝结起始位置前移,增大液滴粒径,提高Laval喷管液化效率。
Due to the fact that the temperature required for hydrogen liquefaction is much lower than that of natural gas,more cumbersome cryogenic processes need to be set up,resulting in complex processes,large floor space,and high investment costs.Supersonic expansion liquefaction technology is an emerging gas liquefaction and separation technology with the advantages of process confinement,energy saving and environmental protection,and low cost.Therefore,the paper proposes to introduce the supersonic expansion liquefaction technology into the field of hydrogen liquefaction.In order to investigate the feasibility of this technology in the field of hydrogen liquefaction,it adopts the Gyarmathy droplet growth model to study the supersonic flow and condensation characteristics of hydrogen gas under different inlet pressure conditions(1.05 MPa、1.10 MPa、1.15 MPa)based on the SIMPLE algorithm and k-ωturbulence model in FLUENT software.The results show that the low-temperature effect caused by the rapid expansion of hydrogen gas will cause spontaneous condensation of hydrogen gas,leading to the rapid formation of liquid droplets over a short distance,which confirmed the feasibility of supersonic hydrogen liquefaction technology.At the same time,the degree of supercooling of hydrogen at the Laval nozzle inlet can be effectively increased,which can make the gas condensation start position move forward,increase the droplet size,and improve the liquefaction efficiency of the Laval nozzle with the increase of hydrogen inlet pressure.
作者
边江
张泽瑜
甘宇
杨文
赵子源
曹学文
BIAN Jiang;ZHANG Zeyu;GAN Yu;YANG Wen;ZHAO Ziyuan;CAO Xuewen(College of Pipeline and Civil Engineering,China University of Petroleum(East China),Qingdao 266580,China;Gas Management Office,PetroChina Southwest Oil&Gas field Company,Chengdu 610215,China;South China Branch,National Pipe Network Group,Guangzhou 510620,China)
出处
《油气与新能源》
2024年第2期50-57,共8页
Petroleum and new energy
基金
国家自然科学基金青年项目“基于超声速膨胀的重烃结晶促进天然气凝结液化机理”(52104071)
中国博士后科学基金项目“基于超声速膨胀的氢气非均质凝结液化机理研究”(2022M723497)。
关键词
氢气
液化
超声速
凝结特性
Laval喷管
Hydrogen
Liquefaction
Supersonic
Condensation characteristics
Laval nozzle
