SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 69 ›› Issue (5): 220-226.DOI: 10.1016/j.cjche.2023.12.024

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Supersonic expansion and condensation characteristics of hydrogen gas under different temperature conditions

Xinyue Duan1, Zeyu Zhang2, Ziyuan Zhao2, Yang Liu2, Liang Gong1, Xuewen Cao2, Jiang Bian2   

  1. 1. College of New Energy, China University of Petroleum (East China), Qingdao 266580, China;
    2. College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, China
  • 收稿日期:2023-10-19 修回日期:2023-12-16 出版日期:2024-05-28 发布日期:2024-07-01
  • 通讯作者: Jiang Bian,E-mail:bj@upc.edu.cn
  • 基金资助:
    This study is supported by the National Natural Science Foundation of China (U2241257), the Postdoctoral Science Foundation of China (2022M723497).

Supersonic expansion and condensation characteristics of hydrogen gas under different temperature conditions

Xinyue Duan1, Zeyu Zhang2, Ziyuan Zhao2, Yang Liu2, Liang Gong1, Xuewen Cao2, Jiang Bian2   

  1. 1. College of New Energy, China University of Petroleum (East China), Qingdao 266580, China;
    2. College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, China
  • Received:2023-10-19 Revised:2023-12-16 Online:2024-05-28 Published:2024-07-01
  • Contact: Jiang Bian,E-mail:bj@upc.edu.cn
  • Supported by:
    This study is supported by the National Natural Science Foundation of China (U2241257), the Postdoctoral Science Foundation of China (2022M723497).

摘要: This paper introduced supersonic expansion liquefaction technology into the field of hydrogen liquefaction. The mathematical model for supersonic condensation of hydrogen gas in a Laval nozzle model was established. The supersonic expansion and condensation characteristics of hydrogen gas under different temperature conditions were investigated. The simulation results show that the droplet number rises rapidly from 0 at the nozzle throat as the inlet temperature increases, and the maximum droplet number generated is 1.339×1018 kg-1 at inlet temperature of 36.0 K. When hydrogen nucleation occurs, the droplet radius increases significantly and shows a positive correlation with the increase in the inlet temperature, and the maximum droplet radii are 6.667×10-8 m, 1.043×10-7 m, and 1.099×10-7 m when the inlet temperature is 36.0 K, 36.5 K, and 37.0 K, respectively. The maximum nucleation rate decreases with increasing inlet temperature, and the nucleation region of the Laval nozzle becomes wider. The liquefaction efficiency can be effectively improved by lowering the inlet temperature. This is because a lower inlet temperature provides more subcooling, which allows the hydrogen to reach the thermodynamic conditions required for large-scale condensation more quickly.

关键词: Hydrogen, Liquefaction, Supersonic, Condensation, Laval nozzle, Computational fluid dynamics

Abstract: This paper introduced supersonic expansion liquefaction technology into the field of hydrogen liquefaction. The mathematical model for supersonic condensation of hydrogen gas in a Laval nozzle model was established. The supersonic expansion and condensation characteristics of hydrogen gas under different temperature conditions were investigated. The simulation results show that the droplet number rises rapidly from 0 at the nozzle throat as the inlet temperature increases, and the maximum droplet number generated is 1.339×1018 kg-1 at inlet temperature of 36.0 K. When hydrogen nucleation occurs, the droplet radius increases significantly and shows a positive correlation with the increase in the inlet temperature, and the maximum droplet radii are 6.667×10-8 m, 1.043×10-7 m, and 1.099×10-7 m when the inlet temperature is 36.0 K, 36.5 K, and 37.0 K, respectively. The maximum nucleation rate decreases with increasing inlet temperature, and the nucleation region of the Laval nozzle becomes wider. The liquefaction efficiency can be effectively improved by lowering the inlet temperature. This is because a lower inlet temperature provides more subcooling, which allows the hydrogen to reach the thermodynamic conditions required for large-scale condensation more quickly.

Key words: Hydrogen, Liquefaction, Supersonic, Condensation, Laval nozzle, Computational fluid dynamics