Abstract
One of the main responsible for the heat flux between the exterior and the interior space is the building’s envelope. In order to achieve better interior thermal comfort conditions, it is necessary to control heat gains and losses through it. The aim of this paper is to analyze the role of the façade and the roof in a habitable volume exposed to the celestial vault and their energetic behavior due to the conductive and the radiative exchanges. A volume with no windows, no thermal insulation, no internal gains and with an approximate sky view factor (SVF) of 80% was used as the study case. The case study was modeled on a digital simulation program. Then it was calibrated and validated with measurements of indoor temperature and relative humidity taken on site for approximately three years. Heat flux values were obtained from the simulation program. With the envelope heat flux analysis, it can be concluded that the roof is the enclosure of the envelope that has the greatest influence on the heat flux balance, consequently also on the indoor temperature behavior.
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