Solution of the Span–Wagner Equation of State Using a Density–Energy State Function for Fluid-Dynamic Simulation of Carbon Dioxide
Journal article, Peer reviewed
Accepted version
Permanent lenke
http://hdl.handle.net/11250/2644005Utgivelsesdato
2012Metadata
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Originalversjon
Industrial & Engineering Chemistry Research. 2012, 51 (2), 1006-1014. 10.1021/ie201748aSammendrag
With the introduction of carbon capture and storage (CCS) as a means to reduce carbon emissions, a need has arisen for accurate and efficient simulation tools. In this work, we propose a method for dynamic simulations of carbon dioxide using the Span–Wagner reference equation of state. The simulations are based on using the density and internal energy as states, which is a formulation naturally resulting from mass and energy balances. The proposed numerical method uses information about saturation lines to choose between single-phase and two-phase equation systems, and is capable of handling phase transitions. To illustrate the potential of the method, it is applied to simulations of tank depressurization, and to fluid-dynamic simulations of pipe transport.