Burner2

Created Montag 08 April 2019


Stationary model of a burner computing the values for outlet enthalpies, temperatures, mass flow rates and pressure for vle and flue gas media from given values.

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.

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 under specific conditions i.e. stationary.

2.2 Physical Effects Considered


3. Limits of Validity


The model is only able to calculate stationary situations.

4. Interfaces


4.1 Steam Signals


For details see SteamSignal_blue, SteamSignal_red and SteamSignal_green.

Flue gas inlet: Grey connector
Flue gas outlet: Grey connector
Wall inlet: Blue connector
Wall outlet: Blue connector
Bundle inlet: Red connector
Bundle outlet: Green connector

4.2 Medium Models


VLE medium model
Flue gas medium model

5. Nomenclature


6. Governing Equations


In general the derived equations for the model consider stationary balance of energy.

6.1 Governing Model Equations

The signal directions at the connectors of the flame room are illustrated below:

The relevant equations for the unknown connector parameters are listed below. All other connector parameters are given via the parameter dialogue of the component or from neighbouring components.

Please note: This component serves as a loop breaker at vle side as on both ports m_flow is given. Please check if both values equal each other.

The heat flow to the wall is calculated as follows:


The friction pressure loss is set by the user via a parameter. A load dependent table is used to calculate the part load pressure drop.


The geodetic pressure loss is calculated using the component inlet and outlet height.


The wall inlet pressure is calculated with the pressure differences due to friction and geodetic height.

The inlet mass flow of the primary air is calculated with the excess air ratio and the inlet fuel mass flow.







The flue gas inlet mass flow is calculated as follows.

The flue gas composition is calculated using a function and the the given inlet compositions and mass flows.

The primary air and flue gas inlet pressures equal the outlet pressure.


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 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

04.05.2016 - Version 1.1.1 - Friedrich Gottelt, XRG Simulation GmbH
06.06.2017 - Version 1.2.2 - Added summary, Timm Hoppe XRG Simulation GmbH