O Brise-Soleil na zona bioclimática 3 sob avaliação dos requisitos da qualidade para o nível de eficiência energética de edifícios comerciais, de serviços e públicos (RQT-C).

Abstract

The present work evaluated the sensitivity of the RTQ-C prescriptive method to the use of brise-soleil compared with the simulation method in the category energy efficiency (EE) for a representative building of offices belonging to the bioclimatic zone 3, in the city of Porto Alegre - RS. Briefly describing, the process consisted in contrasting these two methods by comparing the level of EE and energy consumption of models with and without the brise-soleil, in which the orientation of the longest facades was varied. The results compared were obtained by computer simulation using the program Design Builder. The models were shaded with brises so as to reach envelope label "A", sometimes by the simulation method, others by the prescriptive one. Each model was always assessed by both methods. In no case there was agreement on the level of energy efficiency obtained by the different methods. Envelopes that had Level "A" by simulation did not obtain it by the prescriptive method; envelopes that had Level "A" by the prescriptive method did not obtain it when by simulation. The greatest difference, however, was concerning the energy consumption values of the air conditioner in the models that had EE Level "A" by either method. The models that had level "A" by simulation in the orientations North/South and East/ West generated, respectively, an energy savings of 44% and 47% comparing to the models without brise. On the other hand, the models obtaining Level "A" by the prescriptive method in the orientations North/South and East/West generated, respectively, an energy savings of 34% and 37% with respect to the models without brise. This difference was attributed to the disregard of solar orientation in the evaluation by the prescriptive method, which has advantages regarding the ease of application and positive responses to the use of brises, but also disadvantages by not detecting a higher energy savings of the building.