Fuel System Library - Release Information

Release Notes for Fuel System Library 4.2.2

New versions of Modelon libraries are sold and distributed directly from Modelon, as well as approved resellers. 

New features

  • Implemented a new advanced option for smoothing enthalpy and/or medium composition between control volumes across zero flow. The feature can be enabled with the parameters useSmoothEnthalpy and useSmoothComposition found in the system_AFS block as well as in each components with a dynamic volume.

Improvements

  • Performance improvement for lumped pipe instances that use wall friction only (no lumped losses). The simulation can be twice as fast if all lumped pipes in a model use wall friction only.
  • Performance improvement for lumped pipe and static pipe that uses lumped losses through modifications to SimplePipeResistance models. The simulations can be upto twice as fast in models involving these resistances.

Fixed issues

  • Modelica-based geometry kernels now support physical heat transfer computations.
  • Corrected sign error in acceleration vector of external code geometry kernel.
  • Physical heat transfer models now contain an option to use a beta parameter instead of a beta value computed by the thermodynamic property models. This is set by default. It is useful for non-evaporating media that use an exaggerated beta value in the thermodynamic property models for real-time capability. Due to the exaggerated beta value for real time capability the tank temperature may not drop below 20 degC when using the beta value computed by the thermodynamic property models.

Requirements

  • Fuel System Library 4.2.2 is based on Modelon Base Library 3.0 and Modelica Standard Library 3.2.2. 

Release Notes for Fuel System Library 4.2

Fuel System Library 4.2 is part of Modelon’s 2017.2 release.  

New versions of Modelon libraries are sold and distributed directly from Modelon, as well as approved resellers.

New features

  • Implemented free convection heat transfer correlation based on Nusselt number for the complex tank model
  • Implemented 3D visualization for pipes, boundary conditions, valves, simple tank and pumps

Improvements

  • Added compressibility to non-evaporating and evaporating fuels. Package constant ‘legacyConstants’ when set true, will implement legacy density code for JetA_RT, otherwise it will use a mixture of the CRC data for temperature dependence and the legacy code for pressure dependence. Evaporating fuels will use the same pressure dependence as the non-evaporating fuels.

Fixed issues

  • Fixed initialization of volumes for ‘liquidAtStart’. Reverted to old implementation that uses a lower limit for the gas fraction.

Renamed classes

  • FuelSystem.FluidProperties.Predefined.LiquidGasMixture.NonEvaporatingLiquidGasMixtures -> FuelSystem.FluidProperties.Predefined.LiquidGasMixture.NonEvaporating
  • FuelSystem.FluidProperties.Predefined.LiquidGasMixture.EvaporatingLiquidGasMixtures.EvaporatingJetADryAir -> FuelSystem.FluidProperties.Predefined.LiquidGasMixture.Evaporating.JetADryAir  
  • FuelSystem.FluidProperties.Predefined.LiquidGasMixture.EvaporatingLiquidGasMixtures.EvaporatingJP4DryAir -> FuelSystem.FluidProperties.Predefined.LiquidGasMixture.Evaporating.JP4DryAir 
  • FuelSystem.FluidProperties.Predefined.LiquidGasMixture.EvaporatingLiquidGasMixtures.EvaporatingJP5DryAir -> FuelSystem.FluidProperties.Predefined.LiquidGasMixture.Evaporating.JP5DryAir 
  • FuelSystem.FluidProperties.Predefined.LiquidGasMixture.EvaporatingLiquidGasMixtures.EvaporatingJP8DryAir ->  FuelSystem.FluidProperties.Predefined.LiquidGasMixture.Evaporating.JP8DryAir
  • FuelSystem.FluidProperties.Templates.LiquidGasMixture.NonEvaporatingLiquidGasMixtures -> FuelSystem.FluidProperties.Templates.LiquidGasMixture.NonEvaporating
  • FuelSystem.FluidProperties.Templates.LiquidGasMixture.EvaporatingLiquidGasMixtures.PartialCondensingLiquidGasMixtures -> FuelSystem.FluidProperties.Templates.LiquidGasMixture.Evaporating.PartialCondensing  
  • FuelSystem.FluidProperties.Interfaces.LiquidGasMixture.NonEvaporatingLiquidGasMixtures -> FuelSystem.FluidProperties.Interfaces.LiquidGasMixture.NonEvaporating
  • FuelSystem.FluidProperties.Interfaces.LiquidGasMixture.EvaporatingLiquidGasMixtures -> FuelSystem.FluidProperties.Interfaces.LiquidGasMixture.Evaporating
  • FuelSystem.FluidProperties.EquationsOfState.Interfaces.LiquidGasMixture.EvaporatingLiquidGasMixture -> FuelSystem.FluidProperties.EquationsOfState.Interfaces.LiquidGasMixture.Evaporating

Conversion of user libraries

  • Automatic conversion from previous versions is not supported.

Requirements

  • Fuel System Library is based on Modelon Base Library 3.0 and Modelica Standard Library 3.2.2.