SplitVLE L2 Y

Created Freitag 20 November 2015

Adiabatic VLE-fluid split model describing an ideally stirred fluid volume with dynamic energy and mass balance including pressure losses at each port.

1. Purpose of Model



The model is used as separating component with a constant volume for two inlets.

2. Level of Detail, Physical Effects Considered and Physical Insight


2.1 Level of Detail


Referring to Brunnemann et al. [1], this model refers to the level of detail L2.

2.2 Physical Effects Considered


2.3 Level of Insight


Pressure Loss


Inlet

Outlet 1

Outlet 2

3. Limits of Validity

4. Interfaces


4.1 Physical Connectors


5. Nomenclature



6. Governing Equations


6.1 System Description and General model approach


The model describes an ideally stirred volume element with two outlets and one inlet port.

6.2 Governing Model Equations


Conservation of Mass

The mass balance for the constant volume considers mass flows through the inlet and outlet connectors. The balance equation reads:

Conservation of Momentum

We use balance of stationary momentum to model the frictional pressure losses in the join.

Conservation of Energy

The energy balance for the control volume considers incoming and outgoing enthalpy flow rates. Please note, there are two terms in the equations below that take the derivatives of density and pressure into account. These terms are derived from the total derivative of the inner energy of the zone and appear here due to the special choice of state variables as discussed in Basic Concepts of Modelling. The term with the density derivative can be deactivated with setting the parameter preciseTwoPhase in the expert setting dialog to false. Thus, the influence of h is removed from the right hand side of the equation.

The model's density is taken as an explicit function of the states its total derivative should be used for completeness of the model given by:

Chemistry

no chemistry is considered:

Summary

A summary is available including the following:



7. Remarks for Usage

8. Validation


9. References

[1] Johannes Brunnemann and Friedrich Gottelt, Kai Wellner, Ala Renz, André Thüring, Volker Röder, Christoph Hasenbein, Christian Schulze, Gerhard Schmitz, Jörg Eiden: "Status of ClaRaCCS: Modelling and Simulation of Coal-Fired Power Plants with CO2 capture", 9th Modelica Conference, Munich, Germany, 2012

10. Authorship and Copyright Statement for original (initial) Contribution

Author:
DYNCAP/DYNSTART development team, Copyright 2011 - 2022.
Remarks:
This component was developed during DYNCAP/DYNSTART projects.
Acknowledgements:
ClaRa originated from the collaborative research projects DYNCAP and DYNSTART. Both research projects were supported by the German Federal Ministry for Economic Affairs and Energy (FKZ 03ET2009 and FKZ 03ET7060).
CLA:
The author(s) have agreed to ClaRa CLA, version 1.0. See https://claralib.com/pdf/CLA.pdf
By agreeing to ClaRa CLA, version 1.0 the author has granted the ClaRa development team a permanent right to use and modify his initial contribution as well as to publish it or its modified versions under the 3-clause BSD License.

11. Version History