Eficiência Energética em Lojas da Zona Central de Pelotas, RS: Análise de Envoltórias e Proposição de Medidas de Conservação de Energia.

Abstract

The current energy situation causes concern worldwide towards the natural resources conservation. Several countries have already implemented policies for energy conservation breaking paradigms and changing the way of designing buildings. Brazil resumed its journey in search of guidelines for thermal performance of buildings after the energy crisis in 2001, and thereafter rules and regulations were created in order to increase the energy performance of buildings. This study aims at assessing the level of energy efficiency of commercial buildings envelope- shops of Pelotas city center, RS, identifying ECM - Energy Conservation Measures to assist the improvement of energy performance of these buildings. It also checks the efficiency of MCE uses in coverage, based on the results by computer simulation. The study was divided into four parts, namely: surveys; simulation of the energy level efficiency of the envelope for each chosen building; proposal of measures for energy conservation; economic analysis of corrective measures. Of the 3.206 buildings present in Pelotas city center, it was possible to observe that the up two-story buildings, built in lots, until the 1980s, predominantly in light-colored facades, the percentage of medium transparency in the facades (30 to 70%) characterize the central zone of the city. From these buildings, 16 were chosen and simulated with levels of energy efficiency ranging from A to D, with average consumption of 109,84 kWh/m² per year. As for ECM, three measures were tested: changes in the solar absorptance of the cover; isolation of the coverage and the sum of the two previous measures. For the small stores analyzed, the association of two ECM had the best results, namely the isolation of the coverage and the reduction of the solar absorptance to 0,20. In the big stores, the best results were obtained only by reducing the solar absorptance.