Paredes trombe na zona bioclimática 3: uma investigação sobre a influência de elementos construtivos no desempenho térmico

Abstract

The PT wall (TW) is a passive architectural strategy that utilizes solar radiation to enhance the thermal performance of the built environment. However, investigations have predominantly focused on severe cold climates located in the Northern Hemisphere. This study aims to investigate, through computational simulations, the influence of different constructive elements of the TW system on the thermal performance of buildings located in Juiz de Fora, in Bioclimatic Zone 3. Thus, this work intends to examine the impact of the dimensions of the internal layer openings of a TW, the thickness and material of the internal layer, the material of the external layer, the thickness of the air cavity, and the integration of a solar chimney associated with the TW on the thermal performance of an environment during cold and warm periods in a mild mesothermal climate city (Juiz de Fora – MG). Utilizing computational simulations performed with the Design Builder software, the air temperature and adaptive comfort results are compared to a baseline environment without TW and analyzed during winter and summer periods (one week in January and one in July). The results indicate that the TW generally promotes a thermal lag in the air temperatures of the internal environment in the considered climate, both in winter and summer, though to a lesser extent in the latter. The best result observed for winter was the TW configuration associated with a solar chimney with a closed external vent, providing a 21% increase in the comfort rate of the environment. For the summer, the best scenario was with a 30 cm thick configuration of the internal PT layer, presenting a 14% gain in the ambient comfort rate. These results show that PT can provide a thermal improvement in the environment in both stations analyzed. However, it is essential to point out that the ideal configuration for one station may not be the most efficient for another.