TY - JOUR
T1 - Investigation of gas purging process in pipeline by numerical method
AU - Ma, Denglong
AU - Zhang, Zaoxiao
AU - Li, Yun
N1 - Publisher Copyright:
© 2014 The Institution of Chemical Engineers.
PY - 2015
Y1 - 2015
N2 - Gas purging processes in pipeline safety maintenance were studied using the Computational Fluid Dynamics (CFD) methods. A new model (model 1) closer to actual working conditions and another two-side injection model were investigated. The simulation results showed that the relative purging efficiency of model 1 decreases compared to the ideal model (model 0), and two-sided injection model increases the efficiency relative to the single sided purging model. In addition, the models with different intake methods, outlet positions, outlet sizes and outlet pressures were simulated. If the outlet is opened after delaying some time, purging efficiency is improved. Furthermore if "relay purging" method is adopted, the efficiency is increased by 18% with two gas inlets and by 11% with a single inlet. The outlet position affects the average velocity in the last purging time. If the outlet diameter is equal or larger than that of the inlet, the purging efficiency is much higher.
AB - Gas purging processes in pipeline safety maintenance were studied using the Computational Fluid Dynamics (CFD) methods. A new model (model 1) closer to actual working conditions and another two-side injection model were investigated. The simulation results showed that the relative purging efficiency of model 1 decreases compared to the ideal model (model 0), and two-sided injection model increases the efficiency relative to the single sided purging model. In addition, the models with different intake methods, outlet positions, outlet sizes and outlet pressures were simulated. If the outlet is opened after delaying some time, purging efficiency is improved. Furthermore if "relay purging" method is adopted, the efficiency is increased by 18% with two gas inlets and by 11% with a single inlet. The outlet position affects the average velocity in the last purging time. If the outlet diameter is equal or larger than that of the inlet, the purging efficiency is much higher.
KW - Gas purging
KW - Hot work
KW - Nitrogen replacement
KW - Oil and gas transportation
KW - Pipeline
UR - https://www.scopus.com/pages/publications/84925660430
U2 - 10.1016/j.psep.2014.04.013
DO - 10.1016/j.psep.2014.04.013
M3 - 文章
AN - SCOPUS:84925660430
SN - 0957-5820
VL - 94
SP - 274
EP - 284
JO - Process Safety and Environmental Protection
JF - Process Safety and Environmental Protection
IS - C
ER -