INFLUÊNCIA DE PARÂMETROS DA ENVOLTÓRIA NA CLASSIFICAÇÃO DE EFICIÊNCIA ENERGÉTICA DE EDIFICAÇÕES DE ESCRITÓRIO COM BASE NO NOVO MÉTODO DE AVALIAÇÃO SIMPLIFICADO DO PBE EDIFICA (INI-C)

Abstract

The goal of this paper is to assess the influence of envelope parameters in the energy efficiency classification of two office buildings. The buildings were evaluated in two cities (Curitiba/PR and Cuiabá/MT) regarding the new EPC simplified method of the Inmetro Normative Instruction for commercial buildings (INI-C), PBE Edifica. Two buildings with ten floors were studied, with different areas and form factors: geometry 1 with 500 m² (20 m x 25 m, and FF of 0.22) and geometry 2, with 2,500 m² (50 m x 50 m, and FF of 0.12). Therefore, the envelope parameters varied were the solar heat gain coefficient of the glass (SHGC = 0.82 and SHGC = 0.27), the window-to-wall ratio (40% and 80%), shading angle (30° VSA) and lighting density (8.5 W/m² and 14.1 W/m²). The main results were the cooling load density, envelope efficiency classification and reduction of cooling load percentage to each configuration. Results show that the best configurations were LD A, 40% WWR and laminated glass (SHGC - 0.27). However, the reference glass with shading reaches the highest classification only for Cuiabá. On the other hand, buildings located in Curitiba with reference glass and shading do not reach the highest class. Regarding lighting density, LD D to A improvement is satisfactory in all geometries and cases. Nevertheless, the highest impact happens in the lower FF geometry (geometry 2), which has a larger internal zone area, reaching 20% less cooling load density in Curitiba (decrease of 12.1 kWh/(m².year)) and 6% in Cuiabá (decrease of 11.0 kWh/(m².year)).