Martynov, S;
Brown, S;
Mahgerefteh, H;
Sundara, V;
Chen, S;
Zhang, Y;
(2014)
Modelling three-phase releases of carbon dioxide from high-pressure pipelines.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
, 92
(1)
36 - 46.
10.1016/j.psep.2013.10.004.
![[thumbnail of PSEP-D-13-00111R2_-_final.pdf]](https://discovery.ucl.ac.uk/style/images/fileicons/application_pdf.png) Preview |
PDF
PSEP-D-13-00111R2_-_final.pdf Download (11MB) |
Abstract
This paper describes the development and experimental validation of a three-phase flow model for predicting the transient outflow following the failure of pressurised CO2 pipelines and vessels. The choked flow parameters at the rupture plane, spanning the dense-phase and saturated conditions to below the triple point, are modelled by maximisation of the mass flowrate with respect to pressure and solids mass fraction at the triple point. The pertinent solid/vapour/liquid phase equilibrium data are predicted using an extended Peng–Robinson equation of state. The proposed outflow model is successfully validated against experimental data obtained from high-pressure CO2 releases performed as part of the FP7 CO2PipeHaz project (www.co2pipehaz.eu). The formation of solid phase CO2 at the triple point is marked by a stabilisation in pressure as confirmed by both theory and experimental observation. For a fixed diameter hypothetical pipeline at 100 bar and 20 °C, the flow model is used to determine the impact of the pipeline length on the time taken to commence solid CO2 discharge following its rupture.
| Type: | Article |
|---|---|
| Title: | Modelling three-phase releases of carbon dioxide from high-pressure pipelines |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.psep.2013.10.004 |
| Additional information: | NOTICE: this is the author’s version of a work that was accepted for publication in Process Safety and Environmental Protection. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Process Safety and Environmental Protection, Volume 92, Issue 1, January 2014, Pages 36–46 DOI: http://dx.doi.org/10.1016/j.psep.2013.10.004 |
| Keywords: | Pipeline transportation, Accidental discharge, CO2, Choked flow, Triple point, Homogenous equilibrium model |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1409767 |
Archive Staff Only
 |
View Item |
