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NTU plate L3 standalone

Created Monday 21 February 2022

Heat transfer resistance of a heat exchanger with phase change based on the concepts of Number of Transfer Units (NTU) for plate geometries. This model requires area fractions of the distinct zones which are calculated using PI controllers. The model can be used stand alone.

1. Purpose of Model

Please refer to NTU L3 standalone.

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 L3 because the system is modelled distinguishing three distinct zones, namely the vapour zone, the two-phase zone and the liquid zone.

2.2 Physical Effects Considered

Please refer to NTU L3 standalone.

2.3 Level of Insight

Please refer to NTU L3 standalone.

3. Limits of Validity

Please refer to NTU L3 standalone.

4. Interfaces

Please refer to NTU L3 standalone.

5. Nomenclature

Please refer to NTU L3 standalone.

6. Governing Equations

Please refer to NTU L3 standalone.

6.1 System Description and General model approach

Please refer to NTU L3 standalone.

6.2 General Model Equations

Please refer to NTU L3 standalone.

7. Remarks for Usage

Please refer to NTU L3 standalone.

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
[2] Verein Deutscher Ingenieure: "VDI Heat Atlas", chapter Ca: 'Calculation of Heat Exchangers' (in German), 9th edition, Springer 2002

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

Author:
ClaRa development team, Copyright 2017 - 2022.
Remarks:
This component was developed for ClaRa library.
Acknowledgements:

CLA:

11. Version History

Date - Version - Description of changes - author/revisor
17.01.2022 - v0.1 - initial implementation of the model - Ales Vojacek, XRG Simulation

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Backlinks: ClaRa:A User Guide:Revisions:v1.8.0