Version 4.1
Modelon Library 4.1 is part of Modelon’s 2022.2 release.
New Features
Modelon.ThermoFluid
- Added a compressor model TenCoefficientsCompressor parameterized by the 10 coefficients according to the AHRI-540 standard.
- Added a low fildeity model for a positive displacement compressor Modelon.ThermoFluid.LowFidelity.IsothermalDisplacementCompressor, parameterized by constant volumetric and isothermal efficiencies.
- In the existing positive displacement compressor model, Modelon.ThermoFluid.Compressors.PositiveDisplacementCompressor, added a compressor characteristic model that allow specifying constant volumetric, isentropic and mechanical efficiencies.
Modelon.Media
- Medium interface GenericMedium has been extended with a sub-package "Stagnation", including models and functions fo facilitate more rigorous compressible flow calculations.
- Added equations of state for ideal gases by Walsh & Fletcher for gas turbine engine calculations including dependency on air - burned fuel ratio.
- In IdealGas and RealGas templates, the isentropicExponent function was modified to compute the property from density, velocity of sound and pressure. The result differs from the previous expression only for RealGas.
- Added a function heatCapacityRatio to return the ratios of specific heats, cp/cv. For ideal gases, results are identical to isentropicExponent.
- Added a function compressibilityFactor to HomogeneousMedium interface, and an implementation of it in IdealGas and RealGas templates.
Improvements/Changes
Minor Improvements
- Corrected errors in calculation of static head in LiquidReceiver and PhaseSeparator.
- Added start attribute to variable p_sat in DistributedTwoPhase channel component.
- Corrected an incorrect derivative annotation on function Modelon.Media.Templates.RealGas.setState_pTX.
Conversion of User Libraries
User libraries will automatically be converted from version 4.0. These conversions are made using the included conversion script: Modelon/Resources/Scripts/Convert_to_4.1.mos.