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An experimental investigation on pressure response and phase transition of supercritical carbon dioxide releases from a small-scale pipeline
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Indexed by:期刊论文

First Author:Yan, Xingqing

Correspondence Author:Yu, JL (reprint author), Dalian Univ Technol, Sch Chem Machinery & Safety, Dalian 116024, Peoples R China.

Co-author:Zhu, Hailong,Yu, Jianliang,Chen, Shaoyun,Mahgerefteh, Haroun

Date of Publication:2018-05-01

Journal:ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING

Included Journals:SCIE

Volume:13

Issue:3

ISSN No.:1932-2135

Key Words:phase transition; pressure response; small-scale pipeline; supercritical CO2 release

Abstract:The prediction of the pressure response and phase transition in the event of an accidental carbon dioxide (CO2) release from a ruptured pipeline is of significant importance for understanding the depressurization behaviour and hence the fracture behaviour. This article presented a small-scale experimental investigation on the pressure response and phase transition of supercritical CO2 release from a pressurized pipeline with a relief orifice. High-frequency transducers and thermocouples were used to measure the evolution of CO2 pressures and temperatures at different locations after release. The results indicated that pressures at different locations decreased nearly synchronously after release. No vapour bubble and pressure rebound generated in larger scale release experiments were found in our small-scale release experiments. The depressurization rate was greatly affected by the phase transition. During the release process, the supercritical CO2 firstly turned into an unstable gas with a very great depressurization rate, then changed into the gas-liquid phase with a lower depressurization rate, and finally changed into gaseous CO2. The larger the relief diameter was, the longer the gas-liquid phase state lasted.

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Gender:Male

Alma Mater:大连理工大学

Degree:Doctoral Degree

School/Department:化工学院

Discipline:Industrial Catalysis. Chemical Technology

Business Address:大连理工大学西部校区化工实验楼B219

Contact Information:高新区凌工路2号大连理工西校区化工实验楼B219 Tel:0411-84986322

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