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 

机构地区：[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

出　　处：《Chinese Journal of Chemical Engineering》2021年第4期17-26,共10页中国化学工程学报（英文版）

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).

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.

关 键 词：CO^(2)pipeline Steady choked flow Transient choked flow Water Temperature drop 

分 类 号：TQ022.115[化学工程]