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

doi:10.1016/j.cjche.2020.09.068

中国化学工程学报 ›› 2021, Vol. 32 ›› Issue (4): 17-26.DOI: 10.1016/j.cjche.2020.09.068

• Fluid Dynamics and Transport Phenomena • 上一篇下一篇

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 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

收稿日期:2019-11-13 修回日期:2020-07-12 出版日期:2021-04-28 发布日期:2021-06-19
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).

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 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:2021-04-28 Published:2021-06-19
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).

摘要/Abstract

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

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

Yuxing Li, Shuaiwei Gu, Datong Zhang, Qihui Hu, Lin Teng, Cailin Wang. An experimental study on the choked flow characteristics of CO₂ pipelines in various phases[J]. 中国化学工程学报, 2021, 32(4): 17-26.

Yuxing Li, Shuaiwei Gu, Datong Zhang, Qihui Hu, Lin Teng, Cailin Wang. An experimental study on the choked flow characteristics of CO₂ pipelines in various phases[J]. Chinese Journal of Chemical Engineering, 2021, 32(4): 17-26.

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

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

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