SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 32 ›› Issue (4): 17-26.DOI: 10.1016/j.cjche.2020.09.068

• Fluid Dynamics and Transport Phenomena • Previous Articles     Next Articles

An experimental study on the choked flow characteristics of CO2 pipelines in various phases

Yuxing Li1, Shuaiwei Gu2, Datong Zhang1, Qihui Hu1, Lin Teng1, Cailin Wang1   

  1. 1 Shandong Provincial Key Laboratory of Oil&Gas Storage and Transportation Security, China University of Petroleum(East China), Qingdao 266555, China;
    2 Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
  • Received:2019-11-13 Revised:2020-07-12 Online:2021-06-19 Published:2021-04-28
  • Contact: Yuxing Li
  • Supported by:
    The presented work was funded by Key laboratory of oil & gas storage & transportation PetroChina (GDGS-KJZX-2016-JS-379), and supported by the National Science and Technology Special Project (2016ZX05016-002).

An experimental study on the choked flow characteristics of CO2 pipelines in various phases

Yuxing Li1, Shuaiwei Gu2, Datong Zhang1, Qihui Hu1, Lin Teng1, Cailin Wang1   

  1. 1 Shandong Provincial Key Laboratory of Oil&Gas Storage and Transportation Security, China University of Petroleum(East China), Qingdao 266555, China;
    2 Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
  • 通讯作者: Yuxing Li
  • 基金资助:
    The presented work was funded by Key laboratory of oil & gas storage & transportation PetroChina (GDGS-KJZX-2016-JS-379), and supported by the National Science and Technology Special Project (2016ZX05016-002).

Abstract: High pressure pipeline transportation has been an established technology for economically transporting large amounts of CO2. However, there are still issues and associated risks that have to be effectively addressed and adequately understood. It is well known that a strong Joule-Thomson Cooling effect can occur when pressurized CO2 flows through a choke valve. Thus, to investigate the choking characteristics especially the temperature drop of high pressure CO2, a new laboratory scale experimental setup (total length of 14.85 m and the inner diameter of 15 mm) was constructed. Steady choked flow and transient choked flow tests were carried out respectively for pressurized CO2 in various initial phases. The phase transitions and temperature drop characteristics were then studied following the choked flow and the results show that the phase transitions in steady choked flow differs significantly from that in transient choked flow. For transient choked flow of various initial phases, all the flows downstream would transfer from single phase to gas-liquid two-phase flow. Furthermore, the effect of water on transient choked flow of supercritical CO2 pipeline was investigated, and the phenomena of solid particles deposition was captured which was paramount importance of ensuring the safety operation of CO2 pipelines when throttling by the choke valves.

Key words: CO2 pipeline, Steady choked flow, Transient choked flow, Water, Temperature drop

摘要: High pressure pipeline transportation has been an established technology for economically transporting large amounts of CO2. However, there are still issues and associated risks that have to be effectively addressed and adequately understood. It is well known that a strong Joule-Thomson Cooling effect can occur when pressurized CO2 flows through a choke valve. Thus, to investigate the choking characteristics especially the temperature drop of high pressure CO2, a new laboratory scale experimental setup (total length of 14.85 m and the inner diameter of 15 mm) was constructed. Steady choked flow and transient choked flow tests were carried out respectively for pressurized CO2 in various initial phases. The phase transitions and temperature drop characteristics were then studied following the choked flow and the results show that the phase transitions in steady choked flow differs significantly from that in transient choked flow. For transient choked flow of various initial phases, all the flows downstream would transfer from single phase to gas-liquid two-phase flow. Furthermore, the effect of water on transient choked flow of supercritical CO2 pipeline was investigated, and the phenomena of solid particles deposition was captured which was paramount importance of ensuring the safety operation of CO2 pipelines when throttling by the choke valves.

关键词: CO2 pipeline, Steady choked flow, Transient choked flow, Water, Temperature drop