VCL Version 2.11

Vapor Cycle Library 2.11 is part of Modelon's 2023.2 release. New versions of Modelon's libraries are sold and distributed directly from Modelon, as well as approved resellers.

Version 2.11 contains the changes described below.

Build 1 (2023-06-21)

New features

  • Spline-based Table-lookup medium for psuedo-pure fluids.
  • Characterization of variable speed, positive displacement compressor using look-up tables from standard ASHRAE test data (i.e., power [W], capacity [W], and mass flow rate [kg/s] as a function of condensing and evaporation temperature [K] and speed [rps]).
  • Added example of filling of an ampient temperature tank with cryogenic liquid hydrogen, representing the tank wall temperature dynamics and profile from bottom to top. The example model is avaialble at VaporCycle.Experiments.CryogenicH2.TankFillingVerticalCylinder
  • Added models for cyogenic hydrogen tank sizing computations with relatively simple models in the package VaporCycle.Experiments.CryogenicH2.TankSizing.

New classes

  • FixedDisplacementTableBased_ASHRAE
  • TablesAtFixedDisplacement_ASHRAE
  • Air_to_Air_HeatPump
  • R744SBTL
  • R744SBTL_ExtendedRange


  • Compressor functions VaporCycle.Compressors.Characteristics.VolumetricEfficiency and VaporCycle.Compressors.Characteristics.IsentropicCompressorEfficiency have had derivative functions added to them.
  • Assertions were added to Medium properties for state variables to be within package limits to improve initializatoin robustness. By default, the assertion level is ERROR, but for PbS it is overridden as WARNING. When not using PbS, this can be changed with the inner Settings_TF block using the parameter limitsAction
  • For the VaporCycle.Experiments.HeatPumpSteadyState examples, the documentation has updated and includes predefined Experiments and Views.

Fixed issues

  • In the suction line heat exchanger one error was corrected in the thermal resistnace between capillary and suction line.