TubeBundle L2
Created Friday 01 November 2013
A simple heater/cooler model with ideally stirred phases at the tube bundle side and a heat port for transferring a heat flow. The shell side is not modelled.
1. Purpose of Model
The model is able to transfer a heat flow from/to a fluid via a heat port without modelling the shell side. The model can be used, whether if a known heat flow is transferred to a fluid via a tube bundle or if a heat flow is transferred from a defined temperature boundary.
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 L2 because the system features balance equation for one homogeneous control volume.
2.2 Physical Effects Considered
- dynamic conservation of energy (neglecting kinetic energy terms) in condensating and cooling flows
- dynamic conservation of mass (neglecting kinetic energy terms) in condensating and cooling flows
- strongly reduced momentum balance, taking static pressure differences due to friction losses and geostatic into account
- pressure losses due to friction at tube side
- calculation of heat transfer at tube side
2.3 Level of Insight
Heat Transfer
tube side
- Basics:ControlVolumes:Fundamentals:HeatTransport:Generic HT:Constant L2 : a constant heat transfer coefficient
- Basics:ControlVolumes:Fundamentals:HeatTransport:Generic HT:IdealHeatTransfer L2 : ideal heat transfer, i.e. kc is infinite (see also the remarks for usage)
- Basics:ControlVolumes:Fundamentals:HeatTransport:Generic HT:CharLine L2 : heat transfer coefficient calculated from nominal value and a mass flow dependent correction
- Basics:ControlVolumes:Fundamentals:HeatTransport:VLE HT:NusseltPipe1ph L2 :heat transfer coefficient based on geometry, media data and flow regime - Nusselt number
- Basics:ControlVolumes:Fundamentals:HeatTransport:VLE HT:NusseltPipe2ph L2 :heat transfer coefficient based on geometry, media data and flow regime - Nusselt number
Pressure Loss
tube side
- Basics:ControlVolumes:Fundamentals:PressureLoss:Generic PL:NoFriction L2 : friction free flow between inlet and outlet
- Basics:ControlVolumes:Fundamentals:PressureLoss:Generic PL:LinearPressureLoss L2 : Linear pressure loss based on nominal values, different zones are seen in parallel, pressure loss is located at flanges
- Basics:ControlVolumes:Fundamentals:PressureLoss:Generic PL:QuadraticNominalPoint L2 : Quadratic pressure loss based on nominal values, different zones are seen in parallel, pressure loss is located at flanges, density independent
- Basics:ControlVolumes:Fundamentals:PressureLoss:VLE PL:PressureLossCoefficient L2 : Density dependent pressure loss based on zeta value
- Basics:ControlVolumes:Fundamentals:PressureLoss:VLE PL:QuadraticNominalPoint L2 : Density dependent, quadratic pressure loss based on nominal values
Phase Separation
tube side
Basics:ControlVolumes:Fundamentals:SpatialDistributionAspects:IdeallyStirred : ideally mixed phases
3. Limits of Validity
- ideal stirred phases, i.e. if phase separation at tube side needs to be considered the model loses validity
- no modelling of shell side
4.1 Physical Connectors
Basics:Interfaces:FluidPortIn inlet
Basics:Interfaces:FluidPortOut outlet
Basics:Interfaces:HeatPort a heat
5. Nomenclature
6. Governing Equations
6.1 System Description and General model approach
This model extends from:
- Basics:ControlVolumes:FluidVolumes:VolumeVLE L2 volume of the tube side with a re-declared geometry record: Basics:ControlVolumes:Fundamentals:Geometry:PipeGeometry
7. Remarks for Usage
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 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
- 2012 -v 0.1 - initial implementation - Friedrich Gottelt, XRG Simulation
- 2016 -v 1.1.0 - removed unused parameter orientation - Friedrich Gottelt, XRG Simulation