Buildings.Fluid.Sensors.Conversions

Information

Package Content

Name	Description
To_VolumeFraction	Model to convert between mass fraction and volume fraction
Examples	Collection of models that illustrate model use and test models

Buildings.Fluid.Sensors.Conversions.To_VolumeFraction

Information

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.

Extends from Buildings.BaseClasses.BaseIcon (Base icon).

Parameters

Type	Name	Default	Description
MolarMass	MMMea		Molar mass of measured substance [kg/mol]
MolarMass	MMBul	Modelica.Media.IdealGases.Co...	Molar mass of bulk medium [kg/mol]

Connectors

Type	Name	Description
input RealInput	m	Mass fraction
output RealOutput	V	Volume fraction

Modelica definition

model To_VolumeFraction 
  "Model to convert between mass fraction and volume fraction"
  extends Buildings.BaseClasses.BaseIcon;

  Modelica.Blocks.Interfaces.RealInput m "Mass fraction";
  Modelica.Blocks.Interfaces.RealOutput V "Volume fraction";

 parameter Modelica.SIunits.MolarMass MMMea "Molar mass of measured substance";
 parameter Modelica.SIunits.MolarMass MMBul=Modelica.Media.IdealGases.Common.SingleGasesData.Air.MM 
    "Molar mass of bulk medium";
protected 
 parameter Real con = MMBul/MMMea 
    "Conversion coefficient from mass to volume fraction";
equation 
  V = con * m;
end To_VolumeFraction;