PipeFlowGas L4 Simple
Created Wednesday 12 June 2013
A model for a gas flow in a pipe. A static momentum balance is applied and the kinetic energy terms are neglected. Energy storage in the surrounding wall is not part of the model.
1. Purpose of Model
This model is appropriate if the flow velocities are considerable below the speed of sound and if sound wave effects are negligible. If energy storage in the surrounding wall is of interest consider the combination with Basics:ControlVolumes:SolidVolumes:CylindricalThinWall L4 or Basics:ControlVolumes:SolidVolumes:CylindricalThickWall L4
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 L4 because the system is modelled with the use of balance equations, which are spatially discretised over the component. The discretisation can be defined by the user.
2.2 Physical Effects Considered
- Conservation of Mass
- Conservation of Energy
- Reverse flow
- Heat Transport due to convection
- Pressure loss due to friction
2.3 Level of Insight
Heat Transfer
- Basics:ControlVolumes:Fundamentals:HeatTransport:Generic HT:Adiabat L4
- Basics:ControlVolumes:Fundamentals:HeatTransport:Generic HT:IdealHeatTransfer L4
- Basics:ControlVolumes:Fundamentals:HeatTransport:Generic HT:Constant L4
- Basics:ControlVolumes:Fundamentals:HeatTransport:Generic HT:NominalPoint L4
Pressure Loss
- Basics:ControlVolumes:Fundamentals:PressureLoss:Generic PL:NoFriction L4
- Basics:ControlVolumes:Fundamentals:PressureLoss:Generic PL:LinearPressureLoss L4
- Basics:ControlVolumes:Fundamentals:PressureLoss:Generic PL:QuadraticNominalPoint L4
Geometry
- Pipe_Geometry : Geometry of a pipe
3. Limits of Validity
- Steady flow.
- Fixed control volume.
- Averaging assumption violated.
- The equations imply that the outlet states equal the states in the balance equations - Not true for large volumes and high gradients.
4. Interfaces
4.1 Physical Connectors
Basics:Interfaces:GasPortIn inlet
Basics:Interfaces:GasPortOut outlet
Basics:Interfaces:HeatPort a heat
5. Nomenclature
6. Governing Equations
This component extends the Basics:ControlVolumes:GasVolumes:VolumeGas L4 component with a pipe geometry. Please have a look inside this component for detailed information on the equation system used.
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
- 03.03.2013 - v.0.1 - initial implementation - Lasse Nielsen, TLK Thermo GmbH
Backlinks: ClaRa:Components:Adapters:Scalar2VectorHeatPort