Eficiência energética em edificações públicas: aplicação em projeto padrão de fóruns do poder judiciário alagoano

Abstract

The concept of environmental quality has been gradually incorporated to the field of civil construction, due to the increased discussion about sustainable development. This field is responsible for majority of the natural resources consumption in the planet, especially at buildings, which account for the consumption of 50% of the electrical energy produced in the world. In Brazil, systems development and environmental evaluation tools for civil construction are better advanced than its accession by the users. Behavior changes grow slowly and spontaneously. The contracts for public constructions, however, has mechanisms that can make compulsory the adoption of tools for reducing the consumption of natural resources in this activity, and can still stimulate this process in other sectors. Following this scenario, this research aimed to evaluate the energetic efficiency of a standard project for one branch forums of the Judicial Power of Alagoas. The Technical Regulation of Quality for Energetic Efficiency Level for Commercial, Services and Public Buildings (RTQ-C) was considered, targeting to reach “A” Level in the Brazilian Labeling Program. Labeling the energetic efficiency of buildings became mandatory, since 2014, for new federal public buildings by the Brazilian Government or for those buildings getting retrofit. The methodological procedures included: i) the survey of standard project design characteristics for one branch forums of the Judicial Power in Alagoas; and ii) classification of energetic efficiency of the enclosure, of the lightening, and the air conditioning system of the standard project building. The prescriptive method of the RTQ-C was applied with the aid of the WebPrescritivo tool. The results indicated the general classification of “C” Level for the standard project, considering the classifications for the building enclosure, lightening system, and air conditioning. From this point a set of solution were applied, resulting in an adjusted project, which reached the “A” Level. The changes proposed in the adjusted project resulted in a financial increase of 1.54% of the total budget of the standard project. This can be considered a small financial impact when facing the reduction in the energy consumption, which reached 50% for new buildings and 30%, in case of remodeling existing buildings. This financial increase in the final budget of the building should not represent an obstacle to joining the Brazilian Labeling Program, when the goal is to search for the highest "A" Level of energetic efficiency, thus resulting in a project with higher quality and efficiency.