.BuildingSystems.BoundaryConditions.SkyTemperature.BlackBody

Information

This component computes the black-body sky temperature.

For calTSky = 0, the model uses horizontal infrared irradiation. Otherwise, it uses dry buld temperature, dew point temperature and opaque sky cover.

Revisions

• November 3, 2017, by Michael Wetter:
  Removed import statement.
  This is for #852.
• January 6, 2016, by Moritz Lauster:
  Changed unit and comment of input nOpa for correct display of units in weaBus and input radHorIR to HHorIR for #376.
• May 5, 2015, by Filip Jorissen:
  Converted algorithm section into equation section for easier differentiability.
• August 11, 2012, by Wangda Zuo:
  Renamed radHor to radHorIR.
• October 3, 2011, by Michael Wetter:
  Used enumeration to set the sky temperature computation. Fixed error in if-then statement that led to a selection of the wrong branch to compute the sky temperature.
• March 16, 2011, by Michael Wetter:
  Added types for parameters and attributes for variables. Removed default parameter value.
• March 15, 2011, by Wangda Zuo:
  Use smoothMin() instead of min().
• June 1, 2010, by Wangda Zuo:
  First implementation.