Tube1

Created Dienstag 06 Juni 2017

A stationary model of a tube computing the inlet pressure.

1. Purpose of Model


The model is supposed to be used for the simplified simulation of static cases. Its main purpose is to provide appropriate start or nominal values for similar dynamic model versions. The tube model calculates the inlet pressure in dependence of the set load point. It considers frictional and geodatic pressure losses.

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 because the model only computes a set of parameters stationary in time for the given conditions.

2.2 Physical Effects Considered


3. Limits of Validity


The model is only able to calculate stationary situations. Adiabatic conditions are assumed.

4. Interfaces


4.1 Steam Signals


For details see SteamSignal_blue, SteamSignal_red and SteamSignal_green.

Inlet: Blue connector
Outlet: Blue connector

4.2 Medium Models


VLE medium model

5. Nomenclature


6. Governing Equations


The governing equations consider mainly the pressure difference at the connection ports.

6.1 Governing Model Equations


The inlet pressure is computed from considering a frictional pressure loss and a geodatic pressure loss.

The fricional pressure loss is calculated with the nominal internal pressure loss and a user defined table which is dependent on the target power of the system in which the tube will be used.

The geodatic pressure loss is calculated as follows

The outlet density is calculated by calling the density media function

Summary

A summary is available including the following:

7. Remarks for Usage


The model can only be connected with components with matching connector colour (see Example of Usage in StaticCycles).


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

Date - Version - Description of changes - author/revisor