Sombreamento arbóreo e desempenho termoenergético de edificações

Abstract

The buildings thermoenergetic performances have a relevant role in the paradigm of sustainable development. The aim of this study was to evaluate the effects of trees shades in thermoenergetic performances of public school’s classrooms, in Cuiabá city. The sample was composed of three schools, with the same architectural designs, was implanted in different orientations to the sun and located in different urban sites. In each school, was selected two classrooms, one being fully exposed to solar radiation and other shaded by trees. The methodology consisted by measurements of air temperature, air humidity, globe temperature and illuminance indoor. Outdoor, these measurements were under open sky and under the canopy of trees, in which it was measured also the Leaf Area Index, which allowed to evaluate the attenuation of solar radiation by tree shading units. It was possible demonstrated the importance of shade trees in the mitigation of the external microclimate and in the performance of thermoenergetic environments in warm weather cities. It was found also that there were improvements to the thermal conditions inside the rooms protected by shade trees and natural light losses. These results permitted to quantify the impact of shade tree and equating to an acceptable performance thermoenergetic, using computer simulations of buildings.