modelDelayFirstOrder

Delay element, approximated by a first order differential equation

Extends from AixLib.Fluid.MixingVolumes.MixingVolume.

Information

This model approximates a transport delay using first order differential equations.

The model consists of a mixing volume with two ports. The size of the mixing volume is such that at the nominal mass flow rate m_flow_nominal, the time constant of the volume is equal to the parameter tau.

The heat flux connector is optional and need not be connnected.

Parameters

TypeNameDefaultDescription
Delay time
Modelica.Units.SI.Timetau60Time constant at nominal flow

Revisions

  • July 12, 2024, by Michael Wetter:
    Moved parameter tau to the main parameter tab.
    This is for #1906.
  • March 7, 2022, by Michael Wetter:
    Set final massDynamics=energyDynamics.
    This is for #1542.
  • September 14, 2013, by Michael Wetter:
    Renamed V0 to V_nominal to use consistent notation.
  • September 24, 2008, by Michael Wetter:
    Changed base class from Modelica.Fluid to AixLib library. This was done to track the auxiliary species flow mC_flow.
  • September 4, 2008, by Michael Wetter:
    Fixed bug in assignment of parameter sta0. The earlier implementation required temperature to be a state, which is not always the case.
  • March 17, 2008, by Michael Wetter:
    First implementation.