SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 60 ›› Issue (8): 37-45.DOI: 10.1016/j.cjche.2023.01.016

• Full Length Article • 上一篇    下一篇

Study on two-phase cloud dispersion from liquefied CO2 release

Chaojie Li1, Xianxin Fang2, Meiling Sun3, Jihai Duan2, Weiwen Wang2   

  1. 1. College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
    2. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
    3. Himile Chemical Technology (ShanDong) Co.Ltd, Qingdao 266000, China
  • 收稿日期:2022-08-26 修回日期:2022-12-29 出版日期:2023-08-28 发布日期:2023-10-28
  • 通讯作者: Weiwen Wang,E-mail:wwwang@qust.edu.cn
  • 基金资助:
    This work is supported by the Natural Science Foundation of Shandong Province (ZR2021QB144).

Study on two-phase cloud dispersion from liquefied CO2 release

Chaojie Li1, Xianxin Fang2, Meiling Sun3, Jihai Duan2, Weiwen Wang2   

  1. 1. College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
    2. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
    3. Himile Chemical Technology (ShanDong) Co.Ltd, Qingdao 266000, China
  • Received:2022-08-26 Revised:2022-12-29 Online:2023-08-28 Published:2023-10-28
  • Contact: Weiwen Wang,E-mail:wwwang@qust.edu.cn
  • Supported by:
    This work is supported by the Natural Science Foundation of Shandong Province (ZR2021QB144).

摘要: The knowledge of two-phase cloud dispersion mechanism from HLG (hazardous liquefied gas) release is the prerequisite for accurate assessment and precise rescue of such accidents. In this paper, an experiment of two-phase cloud dispersion from liquefied CO2 hole release is performed. The source terms, such as vapour mass fraction, release velocity and mean droplet diameter, are calculated based on thermodynamic theory. Taking phase transition of CO2 droplets to gas into account, CFD (computational fluid dynamics) model for two-phase cloud dispersion is established. The predicted cloud temperatures at the downstream agree well with the experimental data, with the maximum relative error of 5.8% and average relative error of 2.3%. The consequence distances in the downstream direction and in the crosswise direction calculated through two-phase model are larger than those through single-phase model, with the relative differences of 57.8% and 53.6% respectively. CO2 concentration calculated by two-phase model is smaller in the vicinity of release hole, and larger beyond 0.135 m downstream. A smaller leakage rate results in a lower CO2 concentration and a higher cloud temperature.

关键词: Two-phase cloud, Carbon dioxide, CFD, Dispersion, Phase change

Abstract: The knowledge of two-phase cloud dispersion mechanism from HLG (hazardous liquefied gas) release is the prerequisite for accurate assessment and precise rescue of such accidents. In this paper, an experiment of two-phase cloud dispersion from liquefied CO2 hole release is performed. The source terms, such as vapour mass fraction, release velocity and mean droplet diameter, are calculated based on thermodynamic theory. Taking phase transition of CO2 droplets to gas into account, CFD (computational fluid dynamics) model for two-phase cloud dispersion is established. The predicted cloud temperatures at the downstream agree well with the experimental data, with the maximum relative error of 5.8% and average relative error of 2.3%. The consequence distances in the downstream direction and in the crosswise direction calculated through two-phase model are larger than those through single-phase model, with the relative differences of 57.8% and 53.6% respectively. CO2 concentration calculated by two-phase model is smaller in the vicinity of release hole, and larger beyond 0.135 m downstream. A smaller leakage rate results in a lower CO2 concentration and a higher cloud temperature.

Key words: Two-phase cloud, Carbon dioxide, CFD, Dispersion, Phase change