ThreeWayValveVLE L1 simple

Created Montag 16 November 2015

A model for three way valves with a linear distribution of the mass flow according to the input.

1. Purpose of Model

This model can be used for distributing a mass flow according to the input. No valve characteristic is considered.

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 L1.

2.2 Physical Effects Considered

adiabatic
conservation of mass (no storage, steady flow).
conservation of energy, no losses, no storage

3. Limits of Validity

no pressure loss
no backflow

4. Interfaces

4.1 Physical Connectors

Inlet and outlet connectors combined for:
- Mass flow rate in the connection ports [kg/s].
- Thermodynamic pressure in the connection ports [Pa].
- Specific thermodynamic enthalpy close to the connection port s [J/kg].
- Medium properties at the ports.

4.2 Inputs

Real Input value for the mass flow

distribution.

4.2 Medium Models

Fluid Medium Model at the inlet and outlet ports.

5. Nomenclature

6. Governing Equations

Energy Balance

For an Isenthalpic state transformation (no storage and no loss of energy, no changes of flow velocity) the enthalpies are equal, that is,

Mass Balance

The mass balance for steady flow neglecting mass storage and linear distribution according to the split ratio input reads

Chemistry

No chemical reaction is taking place:

Summaries

A summary is available including the following:

Three records of type FlangeVLE named inlet, outlet1 and outlet2.

7. Remarks for Usage

activate or

deactivate the control signal input by setting openingInputIsActive to true

access additional summary information by setting showExpertSummary to true
create a connector for a cross-shaped visualiser by setting showData to true

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

2013-07-04 - v0.1 - initial implementation - Friedrich Gottelt, XRG Simulation
2017-07-20 - v1.3.0 - rearranged energy conservation equation to avoid division by zero - Timm Hoppe, XRG Simulation