BuildSysPro.BoundaryConditions.Weather.Functions.CalculTsky_withoutRH

# .BuildSysPro.BoundaryConditions.Weather.Functions.CalculTsky_withoutRH

Compute the sky temperature not knowing the relative humidity

## Information

This function returns the sky temperature from the clearness index Kt 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.

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 less precise than the one obtained with CalculTsky_withRH model.

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

Validations

Validated model - Amy Lindsay 03/2014

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

#### Interface

>     function CalculTsky_withoutRH
>       input Modelica.Units.SI.Time t "Time";
>       input Real T_seche "Dry bulb temperature [K]";
>       input Real G[10] "Solar information vector";
>       output Real T_ciel "Sky tempereture [K]";
>     end CalculTsky_withoutRH;

Generated at 2026-05-12T20:19:03Z by OpenModelicaOpenModelica 1.26.7 using GenerateDoc.mos