Modelling the impact of stream impurities on ductile fractures in CO2 pipelines

Mahgerefteh, H; Brown, Solomon; Denton, Garfield

doi:10.1016/j.ces.2012.02.037

Cited by 69 publications

(49 citation statements)

References 24 publications

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“…Bishnoi [21,22], PipeTech [23,24] and CFD-DECOM [25]. These are based entirely on assumptions of one-dimensional homogeneous-equilibrium fluid flow.…”

Section: Computational Fluid Dynamics (Cfd) Technique Have Been Develmentioning

confidence: 99%

Decompression wave speed in CO2 mixtures: CFD modelling with the GERG-2008 equation of state

et al. 2015

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The development of CO2 pipelines for Carbon Capture and Storage (CCS) raises new questions regarding the control of ductile fracture propagation and fracture arrest toughness criteria. The decompression behaviour in the fluid must be determined accurately in order to estimate the proper pipe toughness. However, anthropogenic CO2 may contain impurities that can modify the fluid decompression characteristics quite significantly. To determine the decompression wave speed in CO2 mixtures, the thermodynamic properties of these mixtures must be determined by using an accurate equation of state. In this paper we present a new decompression model developed using the Computational Fluid Dynamics (CFD) package ANSYS Fluent. The GERG-2008 Equation of State (EOS) was implemented into this model through User Defined Functions (UDF) to predict the thermodynamic properties of CO2 mixtures. The model predictions were in good agreement with the experimental data of two 'shock tube' tests. A range of representative CO2 mixtures was examined in terms of the changes in fluid properties from the initial conditions, with time and distance, immediately after a sudden pipeline opening at one end. Phase changes that may occur within the fluid due to condensation of 'impurities' in the fluid were also investigated. Simulations were also conducted to examine how the initial temperature and impurities would affect the decompression wave speed.

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“…Bishnoi [21,22], PipeTech [23,24] and CFD-DECOM [25]. These are based entirely on assumptions of one-dimensional homogeneous-equilibrium fluid flow.…”

Section: Computational Fluid Dynamics (Cfd) Technique Have Been Develmentioning

confidence: 99%

Decompression wave speed in CO2 mixtures: CFD modelling with the GERG-2008 equation of state

et al. 2015

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“…Recently several authors have developed methodologies to couple pipeline outflow and crack propagation models (Greenshields et al, 2000;Aursand et al, 2014;Mahgerefteh et al, 2012;Nordhagen et al, 2012). These methodologies are largely based on the Homogenous Equilibrium Mixture (HEM) model of pipe flow and utilise various models describing the pipe wall rupture, ranging from HLP-type models (Makino et al, 2001;Mahgerefteh et al, 2012) to FEM models accounting for ductile fracture of elasto-plastic material (Aursand et al, 2014). While the above studies have been focused on simulation of ductile fractures, modelling of the brittle mode of pipeline failure has not received as much attention yet.…”

Section: Introductionmentioning

confidence: 99%

Hybrid fluid–structure interaction modelling of dynamic brittle fracture in steel pipelines transporting CO 2 streams

Talemi

Brown

Martynov

et al. 2016

International Journal of Greenhouse Gas Control

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Using the proposed model, a study is performed to evaluate the rate of brittle fracture propagation in a real-scale 48 diameter API X70 steel pipeline. The model was verified by comparing the obtained numerical results against available semi-empirical approaches from the literature. The simulated results are found to be in good correlation with the simulations using a simple semi-empirical model accounting for the fracture toughness, indicating the capability of the proposed approach to predict running brittle fracture in a CO 2 pipeline.

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“…This is understandable to a point, since the transport of CO 2 will have similarities to the natural gas transport pipelines, and therefore can be considered a mature technology. Nevertheless, when considering CO 2 transport there are some technical challenges to be addressed, 10 such as the presence of corrosive elements, in the CO 2 stream, such as H 2 O or O 2 which lead to an increased risk of ductile fracture [3], [4], the variability of flow and the need for establishing a single set of standards and specifications for a network where the CO 2 is originated from different sources and capture technologies. Another important challenge is the cost-optimal design of the CO 2 15 transport system [5].…”

Section: Introductionmentioning

confidence: 99%