functionCalculTsky_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:

T_ciel=-29-19.9*K_t+1.09*T_seche

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)
--------------------------------------------------------------

Inputs

TypeNameDefaultDescription
Modelica.Units.SI.TimetTime
RealT_secheDry bulb temperature [K]
Real[10]GSolar information vector

Outputs

TypeNameDefaultDescription
RealT_cielSky tempereture [K]