MATTRAN - Work Package 3

WORK PACKAGE 3: PIPELINE SPECIFICATION

LEADER: PROF M. DOWNIE

In terms of the pipeline system, the presence of impurities impacts on the pipeline design, compressor power, pumping distance, pipeline capacity and dehydration requirements. Pipeline transport simulation software packages for static and transient analysis are available to model the pipeline network, but these have not been validated for use with CO₂ containing impurities. There is therefore a requirement to provide guidance to the industry on the best practice for using these packages for CO₂ pipeline design. This requires a precise understanding of the phase behaviour of the impure CO₂ and the specification or development of appropriate flow equations and equations of state.

This task will provide the required validation of the models developed in WP2 against actual pipeline data and will also provide inputs into WP6 for modelling the transient behaviour of the CO₂ during a release from the pipeline. Newcastle University are currently conducting research related to the hydraulic modelling of CO₂ pipelines, working closely with the providers of modelling software and interested stakeholders in the US and UK to validate the methodology, currently used for modelling oil and gas pipelines, for CO₂.

It is anticipated that this work package will be conducted in two phases; the first phase will provide a feedback loop to WP1 by conducting hydraulic modelling of pipelines carrying process streams identified in WP1 and identifying particularly beneficial or detrimental levels of impurity. In this phase Newcastle University will also work closely with University of Nottingham to validate the equations of state used in the hydraulic models (WP2.2). In phase 2 of the work package, the models developed in WP2.2 will be used in the hydraulic models to validate these approaches against actual pipeline data. Once validated, the models will be used to investigate the static and dynamic hydraulic behaviour of different CO₂ impurity streams and the combinations of CO₂ streams that could occur in an integrated transport network, including slugging, line packing and multiphase flow. The intended output from this phase would be a CO₂ quality specification that was appropriate for pipeline transport. The final output from this work package will provide physical property models for the fracture propagation modelling of WP6.2.

Work Package 1	WORK PACKAGE 3: PIPELINE SPECIFICATION LEADER: PROF M. DOWNIE In terms of the pipeline system, the presence of impurities impacts on the pipeline design, compressor power, pumping distance, pipeline capacity and dehydration requirements. Pipeline transport simulation software packages for static and transient analysis are available to model the pipeline network, but these have not been validated for use with CO₂ containing impurities. There is therefore a requirement to provide guidance to the industry on the best practice for using these packages for CO₂ pipeline design. This requires a precise understanding of the phase behaviour of the impure CO₂ and the specification or development of appropriate flow equations and equations of state. This task will provide the required validation of the models developed in WP2 against actual pipeline data and will also provide inputs into WP6 for modelling the transient behaviour of the CO₂ during a release from the pipeline. Newcastle University are currently conducting research related to the hydraulic modelling of CO₂ pipelines, working closely with the providers of modelling software and interested stakeholders in the US and UK to validate the methodology, currently used for modelling oil and gas pipelines, for CO₂. It is anticipated that this work package will be conducted in two phases; the first phase will provide a feedback loop to WP1 by conducting hydraulic modelling of pipelines carrying process streams identified in WP1 and identifying particularly beneficial or detrimental levels of impurity. In this phase Newcastle University will also work closely with University of Nottingham to validate the equations of state used in the hydraulic models (WP2.2). In phase 2 of the work package, the models developed in WP2.2 will be used in the hydraulic models to validate these approaches against actual pipeline data. Once validated, the models will be used to investigate the static and dynamic hydraulic behaviour of different CO₂ impurity streams and the combinations of CO₂ streams that could occur in an integrated transport network, including slugging, line packing and multiphase flow. The intended output from this phase would be a CO₂ quality specification that was appropriate for pipeline transport. The final output from this work package will provide physical property models for the fracture propagation modelling of WP6.2.
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