modelTraceSubstancesTwoPort

Ideal two port sensor for trace substance
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Extends from Annex60.Fluid.Sensors.BaseClasses.PartialDynamicFlowSensor, Modelica.Icons.RotationalSensor.

Information

This model outputs the trace substance of the passing fluid. The sensor is ideal, i.e., it does not influence the fluid. If the parameter tau is non-zero, then its output is computed using a first order differential equation. Setting tau=0 is not recommend. See Annex60.Fluid.Sensors.UsersGuide for an explanation.

Parameters

TypeNameDefaultDescription
StringsubstanceName"CO2"Name of trace substance
Initialization
RealC_start0Initial or guess value of output (= state)

Components

TypeNameDefaultDescription
Modelica.Blocks.Interfaces.RealOutputCTrace substance of the passing fluid

Revisions

  • January 26, 2016, by Michael Wetter:
    Avoided assignment of CMed(nominal=0) as this is not allowed.
  • January 18, 2016 by Filip Jorissen:
    Using parameter tauInv since this now exists in Annex60.Fluid.Sensors.BaseClasses.PartialDynamicFlowSensor. This is for #372.
  • June 10, 2015, by Michael Wetter:
    Reformulated assignment of s and assert statement. The reformulation of the assignment of s was done to allow a model check in non-pedantic mode. This is for issue 268.
  • May 22, 2015, by Michael Wetter:
    Corrected wrong sensor signal if allowFlowReversal=false. For this setting, the sensor output was for the wrong flow direction. This is for issue 249.
  • September 10, 2013, by Michael Wetter:
    Corrected syntax errors in setting nominal value for output signal and for state variable. This eliminates a compilation error in OpenModelica.
  • August 30, 2013, by Michael Wetter:
    Added default value C_start=0.
  • November 3, 2011, by Michael Wetter:
    Moved der(C) := 0; from the initial algorithm section to the initial equation section as this assignment does not conform to the Modelica specification.
  • June 3, 2011 by Michael Wetter:
    Revised implementation to add dynamics in such a way that the time constant increases as the mass flow rate tends to zero. This significantly improves the numerics.
  • February 22, by Michael Wetter:
    Improved code that searches for index of trace substance in medium model.
  • September 29, 2009, by Michael Wetter:
    First implementation.