v1.6.0
Created Thursday 03 September 2020
This release is planned for November 2020
Overview
- The major part of the new release includes subsystems.
- The new version of ClaRa comes with lots of enhancement improving usability for setting up coal power plant model, particularly boiler model.
- Visualizers for control system was introduced in order to ease the debugging of the control system. This implementation have great impact on the overall time of debugging the model.
- The new version of ClaRa is compatible with the Modelica Standard Library 4.0.0 (MSL 4.0.0) which is not backward compatible to previous versions of MSL.
New Features
- Lots of compounded components which shall ease the building up models and greatly reduced time and effort for parametrization.
- Improvement for the non-linear pressure drop models QuadraticNominalPoint_L4 (VLE and Gas) in order to remove an extra non-linear system.
- Added option for axial heat conduction for CylindricalThinWall L4 and ThinWall L4.
- Added option for 2 heat ports in VolumeGas L4 Advanced.
- Lots of minor changes which improve usability of ClaRa and make models more robust and widen the scope of application
New Models
- BurnerSlice L4 A burner model considering heat exchange with neighbouring furnace models and cooled walls.
- ConvectiveSlice L4 A furnace model for the convective heat transfer areas of a furnace with neighbouring furnace models, cooled walls, a cooled tube bundle and carrier tubes.
- FreeboardSlice L4 A furnace freeboard model considering heat exchange with neighbouring furnace models and cooled walls.
- HopperSlice L4 A hopper model considering heat exchange with neighbouring furnace models and cooled walls.
- Header A header distribution pipe e.g. for superheater in boilers.
- TubeBundle L4H1 A tube bundle model for a fluid flow inside a pipe with wall.
- RecalculateComposition A model which recalculates composition based on one changed species.
- Volume Gas L2 advanced A model of a gas volume with dynamic energy, mass and momentum balances.
- Lots of new sensors and adapters.
- Lots of new StaticCycle models.
- New visualizers for control system.
Bugfixes
- Bugfix for density calculation of last cell in the non-linear pressure loss model QuadraticNominalPoint_L4 (VLE and Gas).
- Add modifier mediumModel=gasType to summary.vent in VolumeVLEGas_L3 otherwise flue gas was used
- Fixed summary of fluid in VolumeVLEGas_L3 for 1 composition gas
- In gas volumes fixed default values of nominal and start parameters for mass fractions
Detailed Release Notes
Basics
Gas Volumes
- Fixed summary of fluid in VolumeVLEGas_L3 for 1 composition gas which has condensingIndex=0
- In gas volumes fixed default values of nominal and start parameters for mass fractions xi_nom and xi_start to medium.xi_default
- Volume Gas L2 advanced A model of a gas volume with dynamic energy, mass and momentum balances with 2 heat ports.
- Volume Gas L4 advanced Added additional heat ports.
Solid Volumes
Added option for axial heat conduction for CylindricalThinWall L4 and ThinWall L4.
Components
Pipes
- Header A header distribution pipe e.g. for superheater in boilers. This is usually limiting component for the speed of start-up and shut down from the stress point of view and so lifetime.
- TubeBundle L4H1 A tube bundle model for a fluid flow inside a pipe with wall.
- Improvement for the non-linear pressure drop models QuadraticNominalPoint_L4 (VLE and Gas) in order to remove an extra non-linear system.
- Bugfix for density calculation of last cell in the non-linear pressure loss model QuadraticNominalPoint_L4 (VLE and Gas).
Sensors
- Lots of new sensors and adapters.
Adapters
- Lots of new sensors and adapters.
Utilities
- RecalculateComposition A model which recalculates composition based on one changed species.
SubSystems
- Lots of compounded components which shall ease the building up models and greatly reduced time and effort for parametrization. So it eases the parametrization (users now do not need to specify e.g. length of wall and length of the adjacent pipe 2 times) and prevent additional errors.
Furnace
- BurnerSlice L4 A burner model with dynamic mass and energy balance considering heat exchange with neighbouring furnace models and cooled walls.
- ConvectiveSlice L4 A furnace model for the convective heat transfer areas of a furnace with dynamic mass and energy balance considering heat exchange with neighbouring furnace models, cooled walls, a cooled tube bundle and carrier tubes.
- FreeboardSlice L4 A furnace freeboard model with dynamic mass and energy balance considering heat exchange with neighbouring furnace models and cooled walls.
- HopperSlice L4 A hopper model with dynamic mass and energy balance considering heat exchange with neighbouring furnace models and cooled walls.
Visualisation
- Visualizers for control system was introduced in order to ease the debugging of the control system. This tiny implementation have great impact on the overall time of debugging the model.
StaticCycles
- Lots of new StaticCycle models.
Documentation
BoundaryConditions
- added documentation to Ambience.
Pipes
- added documentation to Header, TubeBundle L4H1.
Furnace
- added documentation to BurnerSlice L4, ConvectiveSlice L4, FreeboardSlice L4, HopperSlice L4.
Utilities
- added documentation to RecalculateComposition.
Aknowledgement
The ClaRa developemnt team would like to thank Friedrich Gottelt, (Forschungszentrum für Verbrennungsmotoren und Thermodynamik Rostock GmbH) for large contribution to the ClaRa 1.6.0 contribution and also special thanks to Lausitz Energie Kraftwerke AG who sponsored his effort.