Fire and explosion modelling following the accidental failure of high pressure ethylene transportation pipelines

Jianhao Yu, Haroun Mahgerefteh, Sergey Martynov, Tomasz Olewski, Ioannis Economou, Luc Vechot

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents the development and application of a failure consequence mathematical model for predicting the incident heat flux and explosion over-pressure following the accidental rupture of high pressure ethylene transportation pipelines. The transient discharge rate and the fluid phase at the pipe breach are determined based on the numerical solution of the conservation equations using the Method of Characteristics. The flow model accounts for the important processes taking place during the depressurization process; these include real fluid behaviour, fluid/wall heat transfer and frictional effects. To model the immediate ignition of the escaping high pressure ethylene released, the transient outflow model serving as the source term is linked to the widely established Chamberlain semi-empirical jet fire model to predict the resulting jet flame characteristics including its dimensions and incident heat flux as function of time and distance from the breach location. To deal with a delayed ignition, the source term flow model is linked to the TNO Multi-Energy Vapour Cloud Explosion model to predict the resulting explosion over-pressure and hence the subsequent harm to people and surrounding structures. Simulation results using the model are presented and discussed for the full rupture of a typical 20 km long, 250 mm i.d steel pipeline transporting ethylene at 50 bar and 5 oC.

Original languageEnglish
Title of host publication4th Thermal and Fluids Engineering Conference, TFEC 2019
PublisherBegell House Inc.
Pages195-198
Number of pages4
ISBN (Electronic)9781567004724
DOIs
Publication statusPublished - 1 Jan 2019
Event4th Thermal and Fluids Engineering Conference, TFEC 2019 - Las Vegas, United States
Duration: 14 Apr 201917 Apr 2019

Publication series

NameProceedings of the Thermal and Fluids Engineering Summer Conference
Volume2019-April
ISSN (Electronic)2379-1748

Conference

Conference4th Thermal and Fluids Engineering Conference, TFEC 2019
CountryUnited States
CityLas Vegas
Period14/4/1917/4/19

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Keywords

  • Fire and explosion
  • High pressure ethylene transportation
  • Multiphase flow modelling

ASJC Scopus subject areas

  • Mechanical Engineering
  • Electrical and Electronic Engineering
  • Fluid Flow and Transfer Processes
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment

Cite this

Yu, J., Mahgerefteh, H., Martynov, S., Olewski, T., Economou, I., & Vechot, L. (2019). Fire and explosion modelling following the accidental failure of high pressure ethylene transportation pipelines. In 4th Thermal and Fluids Engineering Conference, TFEC 2019 (pp. 195-198). (Proceedings of the Thermal and Fluids Engineering Summer Conference; Vol. 2019-April). Begell House Inc.. https://doi.org/10.1615/TFEC2019.cbf.028909