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Comprendre la physique des fuites massives de CO2

Abstract : Carbon capture and storage (CCS) is seen a short term solution to limit global warming by capturing CO2 in the plant and injecting it into a geological reservoir. Pipelines are expected to be used to transfer CO2 under high pressure and in dense phase from the plant to the storage site. Hundreds of tons of CO2 might be contained in a pipeline. Since CO2 and the impurities contained in it are toxic, what would be the consequences of a catastrophic failure of such a pipe. The EU project CO2pipehaz [1], intended to answer this question by targeting particularly the key questions of the pipe blowdown giving the flowrate of the leakage [2] and of the early fate of the fluid immediately downstream from the leakage point since the momentum/density/ temperature of the flow dictates the subsequent dilution process in the atmosphere [3]. INERIS contributed in the experimental and theoretical work in support of the numerical simulations. It was found Figure 1 that Homogeneous Equilibrium Models describing the pipe blowdown may be used only in case of a complete failure of the pipe and may become quantitative when heat exchanges between the fluid and the surrounding are accounted for. The classical (even compressible) k-epsilon model and the thermodynamic equilibrium assumption, as traditionally used in Computational Fluid Dynamic codes are not sufficient Figure 2 to fully represent the formation of the jet. Progress is expected in the ongoing CO2QUEST project.
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https://hal-ineris.archives-ouvertes.fr/ineris-01869491
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  • HAL Id : ineris-01869491, version 1

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Christophe Proust. Comprendre la physique des fuites massives de CO2. Rapport Scientifique INERIS, 2014, 2013-2014, pp.14-15. ⟨ineris-01869491⟩

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