Avaliação de desempenho térmico do sistema de vedação vertical de habitações de interesse social para atendimento da ABNT NBR 15575:2013

Abstract

ABNT NBR 15575: 2013 addresses performance in residential buildings based on user requirements for the building and its systems. Among all the evaluations proposed by the standard, we have the thermal performance, which is analyzed from the comparison between internal and external temperatures for performance evaluation in summer and winter, in addition to providing a reference temperature of a “typical day" according to the bioclimatic zone in which the building is inserted. In this context, the goal of this work is to evaluate the thermal performance of a building, based on the analysis of its walls, one of the simplest to be altered and / or adapted to obtain the minimum requirements. The research conducted in this work evaluated the thermal performance of a housing of social interest (HIS) built with molded concrete walls in loco in Uberlândia/ MG. The analyzes were performed using the Energy Plus software by simulating the real project, to verify if there is a hotter or colder location in its interior. It was tried to justify the behavior of the building by simulating also the inexistence of external frames, and the four possibilities of facades orientation in relation to the sun. As results, it was observed that the minimum thermal performance in winter was attended easily. In the summer, however, the minimum performance was only reached when internal average temperatures were compared with the temperature of the "typical day", as for the average external temperature, while the maximum, internal and external, the performance presented unsatisfactory. Alternatives were then analyzed to increase project performance. By isolating the roof and using external ventilated façade, the minimum thermal performance in the summer was not reached. Regarding the operating temperatures in the real project, it was verified that they are only within the comfort zone of the user when they are compared with the average ones.