Abstract
The present paper concerns the importance of a combined modelling and experimental effort to develop physicsbased
combined thermodynamic and transient flow models for CO2-transport pipelines. Such models need to handle
both multiple components and two-phase flow, which can occur both during normal operation and transient
situations, such as first fill and depressurization. Moreover, these models can provide useful input to risk analyses and
design of mitigation actions of undesirable incidents like pipeline rupture and well blow-outs. This paper discusses
various physical phenomena, design issues and solutions by using the experience from actual cases encountered by
Vattenfall, Gassco and Statoil. Among the key issues are the minimum temperature in the pipe wall during
depressurization and the magnitude of pressure oscillations during transient operation.
combined thermodynamic and transient flow models for CO2-transport pipelines. Such models need to handle
both multiple components and two-phase flow, which can occur both during normal operation and transient
situations, such as first fill and depressurization. Moreover, these models can provide useful input to risk analyses and
design of mitigation actions of undesirable incidents like pipeline rupture and well blow-outs. This paper discusses
various physical phenomena, design issues and solutions by using the experience from actual cases encountered by
Vattenfall, Gassco and Statoil. Among the key issues are the minimum temperature in the pipe wall during
depressurization and the magnitude of pressure oscillations during transient operation.