Package with conversions for sensor models


This package contains models to convert sensor output.

Extends from Modelica.Icons.Package (Icon for standard packages).

Package Content

Name Description
Buildings.Fluid.Sensors.Conversions.To_VolumeFraction To_VolumeFraction Conversion from mass fraction to volume fraction
Buildings.Fluid.Sensors.Conversions.Examples Examples Collection of models that illustrate model use and test models

Buildings.Fluid.Sensors.Conversions.To_VolumeFraction Buildings.Fluid.Sensors.Conversions.To_VolumeFraction

Conversion from mass fraction to volume fraction



This component converts mass fraction to volume fraction for an ideal gas. The default value for the parameter MMBul assumes that the bulk medium is air. The model assumes that the concentration of the measured substance is small enough to be neglected in the molar mass of the mixture.


MolarMassMMMea Molar mass of measured substance [kg/mol]
MolarMassMMBulModelica.Media.IdealGases.Co...Molar mass of bulk medium [kg/mol]


input RealInputmMass fraction
output RealOutputVVolume fraction

Modelica definition

model To_VolumeFraction "Conversion from mass fraction to volume fraction" parameter Modelica.Units.SI.MolarMass MMMea "Molar mass of measured substance"; parameter Modelica.Units.SI.MolarMass MMBul=Modelica.Media.IdealGases.Common.SingleGasesData.Air.MM "Molar mass of bulk medium"; Modelica.Blocks.Interfaces.RealInput m "Mass fraction"; Modelica.Blocks.Interfaces.RealOutput V "Volume fraction"; protected parameter Real con = MMBul/MMMea "Conversion coefficient from mass to volume fraction"; equation V = con * m; end To_VolumeFraction;