Modelon Library 3.7 is part of Modelon’s 2021.2 release.
New features using
spline-based table lookup (SBTL):
- Added new R134a SBTL media based on RefProp with extended range. Here is the R134aSBTL Media.
- All functions from the media interface are implemented, so that SBTL media can replace Helmholtz-energy based media in any model without changes to that model.
- Added derivatives, so that tools can generate analytic Jacobians.
- Added support for compressibility effects in pipe components. See an overview on this page.
- Added new type of heat exchanger StaticEffectivenessFromQTable. The rate of heat transfer is mapped directly from the mass flow rates of both mediums via a look-up table using linear interpolation.
- Introduced a set of basic interfaces and components for modeling multi-phase AC (alternating currents) and magnetic circuits.
- Introduced a feature for defining stochastic parameters based on statistical distributions.
- Improved the Equation of state of Helmholtz media to perform in the critical pressure.
- Improved the Equation of state of Helmholtz and SBTL by moving the fluid constant, limits, extendedFluidConstants and supercritical use from the templates to the interface of Helmholtz and SBTL EOS.
- Major improvements using spline-based table lookup (SBTL):
- Increased range where media can be used.
- Improved robustness and better test coverage.
- Restructuring to reduce code duplication.
- In the AirDataImplementations package, an additional template model has been added and the common variables and equations have been moved from XYZ and AED to the Base model.
- AirData models have been updated to follow the standard naming convention.
- A wide range of temperature functions like coldDay and hotDay has been added as users choice for the US76 atmosphere.
Drive Cycle Source Blocks
Almost 60 pre-defined, industry-standard source data blocks have been added. The new drive cycle blocks can be found in
- Added new friction model ReentrantIntake
- The following friction models have been updated to account for bidirectional flow:
- Flow coefficients in valves:
- Move options for flow coefficient parametrization to a dedicated model
- Add a separate model to calculate the resulting valve area based on the parametrization choice.
- Apply these parametrization templates to the compressible and incompressible valves.
- In FlowCoeffCalc, define conversions between different parametrization options based on unit conversion constants.
- As a consequence of the gain in precision in the conversions, some minor differences can be observed in results. Previous valve models have been moved to a deprecated packages.
- Fix sign error in logMean function for the case where input arguments have small difference.
For result continuity only - updated models remain available at the same path:
- Modelon.ThermoFluid.Valves.ValveCompressible → Modelon.ThermoFluid.Valves.Deprecated.ValveCompressible
- Modelon.ThermoFluid.Valves.ValveIncompressible → Modelon.ThermoFluid.Valves.Deprecated.ValveIncompressible
Classes that were duplicates of those in the Modelica Standard Library:
- Modelon.Mechanics.MultiBody.Interfaces.Frame_a → Modelica.Mechanics.MultiBody.Interfaces.Frame_a
- Modelon.Mechanics.MultiBody.Interfaces.Frame_b → Modelon.Mechanics.MultiBody.Interfaces.Frame_b
- Modelon.Mechanics.MultiBody.Interfaces.Frame_resolve → Modelon.Mechanics.MultiBody.Interfaces.Frame_resolve
Conversion of User Libraries
User libraries will automatically be converted from version 3.6. These conversions are made using the included conversion script: Modelon/Resources/Scripts/Convert_to_3.7.mos.