Paredes verdes : vegetação como qualidade ambiental no espaço construido / Green walls : environmental quality in the buildings




The use of vegetation as bioclimatic strategy is well-known by researchers and professionals from the construction sector. There are few studies, however, about the effectiveness of the green walls in creating comfortable environments. As façade element, the vegetation can minimize heat gain, providing a better thermal comfort condition in the buildings. The adoption of this façade element should be present from the beginning of the program for elaboration of architectural project. In this work it was accomplished a survey and analysis of the green wall behavior and its contribution to attenuate the heat gain inside the construction having in mind the following indicators: thermal comfort, orientation of the façade, aesthetics, maintenance and preservation of the construction and vegetation. The research was accomplished in two segments. First, a study case in the city of Campinas, through evaluation of the thermal performance of two buildings with identical construction, the only difference between them being the presence of creeper in the façade. The behavior of the creeper Parthenocissus Tricuspidata (Japanese -ivy), was evaluated and its effects on air temperature, relative humidity and air speed, as well as superficial temperature of the internal and external wall. The analysis of the external and internal environment temperatures was compared with the answers about thermal comfort and sensation obtained through interviews applied to the inhabitants of the constructions, allowing determining the limits of thermal comfort conditions. In the second moment it was accomplished an experimental study in three cells-tests, by comparing the performance of a wall without creeper, a wall with creeper in the façade, and in the last case a wall with creeper on latticework 20 cm distant from the wall. The results allow the conclusion that the use of the vegetation creeper in façades attenuates the heat gain in buildings in hotter periods. The study also demonstrated that, as referring to thermal performance, the creeper directly in the façade as well as on the 20 cm distant latticework is equally indicated


conforto termico human comfort vegetation and climate vegetação e clima thermal comfort conforto humano

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