CO<sub>2</sub> Pipeline Integrity: A Coupled Fluid-structure Model Using a Reference Equation of State for CO<sub>2</sub>

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CO₂ Pipeline Integrity: A Coupled Fluid-structure Model Using a Reference Equation of State for CO₂

Aursand, E. / Aursand, P. / Berstad, T. / Dörum, C. / Hammer, M. / Munkejord, S.T. / Nordhagen, H.O.

We present a coupled fluid-structure model to study crack propagation and crack arrest in pipelines. Numerical calculations of crack arrest, crack velocity and pressure profiles have been performed for steel pipes with an outer diameter of 267 mm and a wall thickness of 6 mm. The pipe material and fracture propagation have been modelled using the finite-element method with a local ductile fracture criterion and an explicit time-integration scheme. An in-house finite-volume method has been employed to simulate the fluid dynamics inside the pipe, and the resulting pressure profile was for each time step applied as a load in the finite-element model. Choked-flow theory was used for calculating the flow through the pipe opening as the crack propagated. Simulations were performed with both methane and CO₂, pressurized at 75, 120 and 150 bar. Initial results indicate that crack arrest does not necessarily occur with CO2 under circumstances where it would occur with methane.

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Dokumentinformationen

Titel :

CO₂ Pipeline Integrity: A Coupled Fluid-structure Model Using a Reference Equation of State for CO₂

Beteiligte:

Aursand, E. (Autor:in) / Aursand, P. (Autor:in) / Berstad, T. (Autor:in) / Dörum, C. (Autor:in) / Hammer, M. (Autor:in) / Munkejord, S.T. (Autor:in) / Nordhagen, H.O. (Autor:in)

Erschienen in:

GHGT, International Conference on Greenhouse Gas Control Technologies, 11 ; 3113-3122

Energy Procedia (online) ; 37

Erscheinungsdatum :

2013

Format / Umfang :

10 Seiten, 19 Quellen

ISSN :

1876-6102

DOI :

https://doi.org/10.1016/j.egypro.2013.06.197

Medientyp :