Buildings.Utilities.Psychrometrics.BaseClasses

Information

This package contains base classes that are used to construct the models in Buildings.Utilities.Psychrometrics.

Package Content

Name	Description
HumidityRatioVaporPressure	Humidity ratio for given water vapor pressure

Buildings.Utilities.Psychrometrics.BaseClasses.HumidityRatioVaporPressure

Information

Partial Block to compute the relation between humidity ratio and water vapor partial pressure.

If use_p_in is false (default option), the p parameter is used as atmospheric pressure, and the p_in input connector is disabled; if use_p_in is true, then the p parameter is ignored, and the value provided by the input connector is used instead.

Parameters

Type	Name	Default	Description
Boolean	use_p_in	true	Get the pressure from the input connector
Pressure	p	101325	Fixed value of pressure [Pa]

Connectors

Type	Name	Description
input RealInput	p_in	Atmospheric Pressure [Pa]

Modelica definition

partial block HumidityRatioVaporPressure 
  "Humidity ratio for given water vapor pressure"
  extends Modelica.Blocks.Interfaces.BlockIcon;
  parameter Boolean use_p_in = true "Get the pressure from the input connector";

  parameter Modelica.SIunits.Pressure p = 101325 "Fixed value of pressure";
  Modelica.Blocks.Interfaces.RealInput p_in(final quantity="Pressure",
                                         final unit="Pa",
                                         min = 0) if  use_p_in 
    "Atmospheric Pressure";

protected 
  Modelica.Blocks.Interfaces.RealInput p_in_internal 
    "Needed to connect to conditional connector";
equation 
  connect(p_in, p_in_internal);
  if not use_p_in then
    p_in_internal = p;
  end if;
end HumidityRatioVaporPressure;