LinearPressureLoss L2

Created Monday 10 June 2013

A very robust pressure drop model - depending only of nominal values of pressure difference and mass flow rate and the actual mass flow rate

1. Purpose of Model

This model is appropriate if a pressure drop due to friction, depending on the load is needed (either due to numerical or technical reasons), but if the numerical robustness of the model is more important than accuracy. The model is parametrized by choosing a nominal load point and the corresponding pressure loss.

2. Physical Insight

This replaceable model is compatible to models of level of detail L2 according to Brunnemann et al. [1] since the friction losses are lumped over the component.

3. Limits of Validity

no supercritical flow conditions are supported
no significant changes of inlet density over time
significant deviations from nominal point

4. Interfaces

The model communicates via outer models and records. Thus, it expects to have:

an outer record named iCom as defined in Basics:Records:IComBase L2

5. Nomenclature

a table referencing the nomenclature in the source code, the descriptions of variables and the "human-readable"

6. Governing Equations

7. Remarks for Usage

The model can be used as long as a huge deviation for the mass flow from nominal point is not expected. For operating points which differ significantly from nominal point the accuracy can be very poor. However, the numerical robustness of the model is very good.

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 Simulationof 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

2012 - v 0.1 - initial implementation - Friedrich Gottelt, XRG Simulation