Constant L3
Created Donnerstag 15 Oktober 2015
A heat transfer model based on the mean heat transfer coefficient (htc) which is a user-defined parameter
1. Purpose of Model
This model allows a simple and robust definition of the heat transfer coefficient. The model is appropriate when dependencies of the fluid properties and mass flow rate on the heat transfer are negligible or the affected component is not limiting the heat transfer as other components feature a significant lower heat transfer coefficient.
2. Physical Insight
This replaceable model is compatible to models of level of detail L3 according to Brunnemann et al. [1] since no spacial resolution of the heat transfer is assumed.
3. Limits of Validity
- no dependencies of fluid properties, e.g. from density or Prandtl - number
4. Interfaces
The model communicates via outer models and records. Thus its expects to have:
- an outer model named geo as defined Fundamentals:Geometry:GenericGeometry
- an outer record named iCom as defined in Basics:Records:IComBase L2
5. Nomenclature
6. Governing Equations
The heat transfer coefficient array α is equal to the user-defined nominal heat transfer coefficient:
7. Remarks for Usage
- Avoid very large values for
as it will cause numerical problems without gaining extra precision. Use IdealHeatTransfer L3 instead.
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
Backlinks: ClaRa:Components:MechanicalSeparation:BalanceTank L3 ClaRa:Components:MechanicalSeparation:Bottle L3 ClaRa:Components:MechanicalSeparation:Drum L3 ClaRa:Components:MechanicalSeparation:FeedWaterTank L3 ClaRa:Basics:ControlVolumes:FluidVolumes:VolumeVLE L3 TwoZonesNPort