.BuildingSystems.Fluid.Sensors.TraceSubstancesTwoPort

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 BuildingSystems.Fluid.Sensors.UsersGuide for an explanation.

Revisions

• February 25, 2020, by Michael Wetter:
  Changed icon to display its operating state.
  This is for #1294.
• 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 BuildingSystems.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.