functionTDewPoi_pW
Function to compute the water vapor partial pressure for a given dew point temperature of moist air
Extends from Modelica.Icons.Function (Icon for functions).
Information
Dew point temperature calculation for moist air above freezing temperature.
The correlation used in this model is valid for dew point temperatures between 0°C and 200°C. It is the correlation from 2005 ASHRAE Handbook, p. 6.2. In an earlier version of this model, the equation from Peppers has been used, but this equation yielded about 15 Kelvin lower dew point temperatures.
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Pressure | p_w | Water vapor partial pressure |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Temperature | T | Dew point temperature |
Contents
| Name | Description |
|---|---|
 pW_TDewPoi_inversionprotected | Internal function to solve eps=f(NTU, Z) for NTU for cross flow unmixed |
Revisions
-
February 28, 2020, by Michael Wetter:
Replaced call toMedia.Common.OneNonLinearEquationto use Modelica.Math.Nonlinear.solveOneNonlinearEquation becauseMedia.Common.OneNonLinearEquationwill be obsolete in MSL 4.0.0.
This is for issue 1299. -
April 29, 2014 by Michael Wetter:
Added dummy argument toInternal.solveto avoid a warning in Dymola 2015. -
March 9, 2012 by Michael Wetter:
AddedsmoothOrder=99anddisplayUnitfor pressure. -
February 17, 2010 by Michael Wetter:
Renamed function fromdewPointTemperaturetopW_TDewPoi. -
February 6, 2010 by Michael Wetter:
Fixed derivative implementation. -
September 4, 2008 by Michael Wetter:
Changed from causal to acausal ports, needed, for example, for Buildings.Fluid.Examples.MixingVolumeMoistAir. -
August 7, 2008 by Michael Wetter:
First implementation.