.Modelica.Media.Examples.PsychrometricData .Modelica.Media.Examples.PsychrometricDataThis model produces psychrometric data from the moist air model
in this library to be plotted in charts. The two most common chart
varieties are the Mollier Diagram and the Psychrometric Chart. The
first is widely used in some European countries while the second is
more common in the Anglo-American world. Specific enthalpy is
plotted over absolute humidity in the Mollier Diagram, it is the
other way round in the Psychrometric Chart.
It must be noted that the relationship of both axis variables is
not right-angled, the absolute humidity follows a slope which
equals the enthalpy of vaporization at 0 °C. For better reading and
in order to reduce the fog region the humidity axis is rotated to
obtain a right-angled plot. Both charts usually contain additional
information as isochores or auxiliary scales for e.g., heat ratios.
Those information are omitted in this model and the charts below.
Other important features of psychrometric chart data are that all
mass specific variables (like absolute humidity, specific enthalpy
etc.) are expressed in terms of kg dry air and that their baseline
of 0 enthalpy is found at 0 °C and zero humidity.
Legend: blue - constant specific enthalpy, red - constant temperature, black - constant relative humidity
The model provides data for lines of constant specific enthalpy, temperature and relative humidity in a Mollier Diagram or Psychrometric Chart as they were used for the figures above. For limitations and ranges of validity please refer to the MoistAir package description. Absolute humidity x is increased with time in this model. The specific enthalpies adjusted for plotting are then obtained from:
| Name | Description |
|---|---|
 Medium |
Used medium package |