A análise da influência da cor no desempenho térmico de envoltórias para o RTQ-C: estudo de caso do Edifício Origem

Abstract

This work examines the influence of colors used on the facades of a commercial building, located in the city of Itabira (MG, Brazil), in the classification of the envelope requirement by the method of RTQ-C. The prerequisite evaluated is colors and absorptance of surfaces, whose performance in the attenuation of heat gain is compared with the system used in the building facade. First, the thermal transmittance and absorptance values of the facade of the building are calculeted, according to the RTQ-C. After that, using the simulation program PowerDomus energy, one thermal zone of building was modeled, which is the base for comparison between two different cases. The first case considered using two different facade systems, comparing the performance of standard transmittance and low absorptance with high transmittance and low absorptance. The second case compares the use of different values of absorptance with low transmittance facade. Finally, we present the considerations based on results obtained in calculations and simulations.