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Global sensitivity analysis of the impact of impurities on CO2 pipeline failure

Brown, S; Beck, J; Mahgerefteh, H; Fraga, ES; (2013) Global sensitivity analysis of the impact of impurities on CO2 pipeline failure. RELIABILITY ENGINEERING & SYSTEM SAFETY , 115 43 - 54. 10.1016/j.ress.2013.02.006. Green open access

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Abstract

This paper describes the testing, comparison and application of global sensitivity techniques for the study of the impact of the stream impurities on CO2 pipeline failure. Global sensitivity analysis through non-intrusive generalised polynomial chaos expansion with sparse grids is compared to more common techniques and is found to achieve superior convergence rate to crude Monte Carlo, quasi-Monte Carlo and EFAST for functions with up to a moderate level of “roughness”. This methodology is then applied to the hypothetical full bore rupture of a 1 km CO2 pipeline at 150 bara and 283.15 K. The sensitivity of the ensuing outflow to the composition of a quaternary mixture of CO2 with N2, CH4 and O2 as representative stream impurities. The results indicate that the outflow rate is highly sensitive to the composition during the early stages of depressurisation, where the effect of the impurities on phase equilibria has a significant impact on the outflow.

Type: Article
Title: Global sensitivity analysis of the impact of impurities on CO2 pipeline failure
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.ress.2013.02.006
Publisher version: http://dx.doi.org/10.1016/j.ress.2013.02.006
Additional information: © 2013 Elsevier Ltd. All rights reserved. This work is licensed under a Creative Commons Attribution 3.0 Unported License.
Keywords: Global sensitivity analysis, Generalised polynomial chaos, Sparse grid, Uncertainty quantification, CO2 pipeline failure, Failure consequence analysis
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
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1389382
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