Sun patch impact for the evaluation of operative temperatures distributions
Résumé
A numerical model has been developed in order to accurately simulate the transient thermal behavior of a building (a single room). This model has already been described in (Rodler et al., 2013): the energy balance equations consider irradiation, convection, air enthalpy and three‐dimensional heat conduction. The particularity of the program is that it projects the sun patch on the inner walls.
The operative and mean radiant temperature are important parameters for the evaluation of comfort indices. Their calculations require the air temperature values and the surfaces temperatures field which vary in the sunspace as a function of position and disposition of the person. We show the importance of the knowledge of the operative temperature distribution and its consequences on the thermal comfort. The refined 3D model is compared to the one obtained by the classical distribution of the solar radiation with a 1D conduction approach and by assuming all incoming radiation touches the floor. The sun patch impact and its three dimension effect are finally discussed for the comfort evaluation of a low inertia cell.