An experimental study on the choked flow characteristics of CO_(2) pipelines in various phases

作     者：Yuxing Li Shuaiwei Gu Datong Zhang Qihui Hu Lin Teng Cailin Wang Yuxing Li;Shuaiwei Gu;Datong Zhang;Qihui Hu;Lin Teng;Cailin Wang

作者机构：Shandong Provincial Key Laboratory of Oil&Gas Storage and Transportation SecurityChina University of Petroleum(East China)Qingdao 266555China Department of Energy and Power EngineeringTsinghua UniversityBeijing 100084China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2021年第34卷第4期

页      面：17-26页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 0703[理学-化学] 

基　　金：Key laboratory of oil&gas storage&transportation PetroChina(GDGS-KJZX-2016-JS-379) supported by the National Science and Technology Special Project(2016ZX05016-002). 

主　　题：CO^(2)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 CO_(2).However,there are still issues and associated risks that have to be effectively addressed and adequately understood.It is well known that a strong JouleThomson Cooling effect can occur when pressurized CO_(2) flows through a choke valve.Thus,to investigate the choking characteristics especially the temperature drop of high pressure CO_(2),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 CO_(2) 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 twophase flow.Furthermore,the effect of water on transient choked flow of supercritical CO_(2) pipeline was investigated,and the phenomena of solid particles deposition was captured which was paramount importance of ensuring the safety operation of CO_(2)pipelines when throttling by the choke valves.