An experimental investigation of supercritical CO2 accidental release from a pressurized pipeline

An experimental investigation of supercritical CO2 accidental release from a pressurized pipeline

Type	Journal Article
Author	Kang Li
Author	Xuejin Zhou
URL	http://www.sciencedirect.com/science/article/pii/S0896844615301376
Volume	107
Pages	298-306
Publication	The Journal of Supercritical Fluids
Date	January 2016
Abstract	Reports experiments at laboratory scales to examine the behavior of the release of supercritical CO2 from pipelines, including the rapid depressurization process and jet flow phenomena at various sizes of the leakage nozzle. The dry ice bank formed near the leakage nozzle was affected by the size of the leakage nozzle. The local Nusselt numbers at the leakage nozzle were calculated. Data suggest enhanced convective heat transfer for larger leakage holes. The mass outflow rates for various sizes of leakage holes were obtained and compared with two typical accidental gas release mathematical models. Results revealed that the hole model has a better prediction than the modified model for small leakage holes. The experiments provide fundamental data for the CO2 supercritical-gas multiphase flows in the leakage process. The data can be used to guide the development of the leakage detection technology and risk assessment for the CO2 pipeline transportation.