.BuildingSystems.Utilities.Psychrometrics.Functions.pW_X

Information

Function to compute the water vapor partial pressure for a given humidity ratio.

Interface

function pW_X
  extends Modelica.Icons.Function;
  input Modelica.Units.SI.MassFraction X_w(min = 0, max = 0.99999, nominal = 0.01) "Species concentration at dry bulb temperature";
  input Modelica.Units.SI.Pressure p = 101325 "Total pressure";
  output Modelica.Units.SI.Pressure p_w(displayUnit = "Pa") "Water vapor pressure";
end pW_X;

Revisions

• March 9, 2012 by Michael Wetter:
  Added smoothOrder=99 and displayUnit for pressure.
• February 17, 2010 by Michael Wetter:
  Renamed block from VaporPressure_X to pW_X.
• April 14, 2009 by Michael Wetter:
  Converted model to block because RealInput are obsolete in Modelica 3.0.
• August 7, 2008 by Michael Wetter:
  First implementation.