.BuildSysPro.BoundaryConditions.Weather.Functions.CalculTsky_withRH

Information

This function returns the sky temperature from the water vapor pressure and the dry bulb temperature.

Hypothesis and equations

This function returns the sky temperature based on the following equation:

with:

• Kt defined as the ratio between the global horizontal received to the ground and the global horizontal received outside atmosphere.
• Pvap the water vapor pressure.

Bibliography

Longwave sky radiation parameterizations , M. Aubinet, Solar Energy n°53 (version 2) pp. 147-154, 1994

Instructions for use

none

Known limits / Precautions for use

This sky temperature estimation is more precise than the one obtained with CalculTsky_withoutRH model.

Of course, there are other correlations to calculate the sky temperature.

Validations

Validated model - Amy Lindsay 03/2014

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Licensed by EDF under a 3-clause BSD-license
Copyright © EDF 2009 - 2023
BuildSysPro version 3.6.0
Author : Amy LINDSAY, EDF (2014)
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Interface

function CalculTsky_withRH
  input Modelica.Units.SI.Time t "Time";
  input Real T_seche "Dry  bulb temperature [K]";
  input Real G[10] "Solar information vector";
  input Real Pvap "Water vapor pressure [Pa]";
  output Real T_ciel "Sky tempereture [K]";
end CalculTsky_withRH;