Treatment of water‐CO2 mixtures including fluid flow
Project period2014 – 2015
This project is split in two phases. The first phase is a prolongation of the CLIMIT project no. 208553/E20 "Simulation of CO2 behaviour in flow and depressurization" (SolidCO2Sim) and will be carried out in 2014. The target of the 208553/E20 project was:
"Predict behaviour of CO2 during flow and pressure changes under different conditions and applications. The aspect that additional effects might influence the behaviour of CO2 rich mixture, such as exposure or not exposure of heat (fire), shall be included. One of the key parameters is to be able to predict formation of solid CO2 and the influence on the flow in reservoir formations and 3‐dimensional pipe network as well as in process facilities (vessels, distillation columns. etc.)."
"The objective for 2014 is to utilise the technology that has been developed during the SolidCO2Sim project to establish tools and services that shall be available for the sponsors of the project. The objective for 2014 is to fulfil the objective of the SolidCO2Sim project."
Following activities will be performed during 2014:
• Implementation of the DB‐SIMPLE method for multiphase simulation in Brilliant. Brilliant is a general purpose, multi‐physic CFD (Computational Fluid Dynamic) system with seamless integration of a FEM (Finite Element) system for linear and nonlinear stress analyses. ThermoProp is integrated in Brilliant. Brilliant also includes flow in porous media.
• Implementation of the DB‐SIMPLE method for use in VessFire 2.0. VessFire 2.0 is a general system for simulation of blowdown of process segments. VessFire 2.0 will, by use of DB‐SIMPLE, be
able to handle multiphase flow including phase changes. For CO2, phase changes in the triple point, liquid‐solid‐gas, shall be included. The 2.0 version will be compared with experiments.
• Development of specialised GUI for VessFire 2.0. To make VessFire available for industrial application a specialised user interface will be developed.
Besides the ability to treat all phases of CO2 VessFire will be able to predict dynamic behaviour of flow and phase changes in a flare system during blowdown. That will contribute to better design of one of the most important safety system in process plants.
The technical challenge is to create an efficient system that is stable and performs well within a reasonable simulation time. To get a correct picture of the fluid flow behaviour in the three
dimensional pipe net, the connection between the process components, such as pipes and vessels, must be handled correctly and efficient.
Present status is:
Connections between components has been implemented and tested. The connection is based on "virtual connections" that gives a flexible and precise representation of the physics. 3D pipes and vessels in implemented and the project is well into the GUI development.