Avaliação do desempenho luminoso de uma sala comercial com fachada dupla por meio de simulação computacional

Abstract

The building sector is responsible for more than a third of the global energy consumption and almost 40% of CO2 emissions and the emergence of a global concern related to energy consumption has caused a search for more efficient energy strategies. Given this context, in the last decades, there has been a growing interest in the use of double facades in buildings as an alternative to improve the environmental comfort to users aiming the reduce of energy consumption. In view of the small number of studies about the influence of double facades on the internal daylighting of buildings in the national context, the aim of this work was to evaluate the illumination performance of an office space, for São Paulo. A double skin facade and a single glass facade were considered in the study both with and without windowsill. The simulations of natural light were carried out using Climate Based Dinamic Modeling, through the use of Rhinoceros software and DIVA plugin. The results showed that the use of the double skin façade in most cases did not impair the lighting performance within the considered environment and can even be said to be advantageous in specific situations. The conclusions of the work can serve as a guide and reference on how the double skin facade influences the daylight performance in the built environment, thus contributing to the discussions on the theme that is still little addressed in the scientific field. Future studies may include more locations, surroundings analysis, facade orientation variations and other reflectance and transmissivity índices.