Relação custo-benefício de medidas de conservação de energia em retrofit de edifício de escritórios na zona bioclimática 02.

Abstract

The design of buildings adapted to the climate is essential, mainly due to the need to reduce energy consumption in buildings. In the case of existing and energy-inefficient buildings, retrofit is indicated to raise the level of energy efficiency and improve thermal comfort. According to the Building Performance Standard, retrofit is defined as the "Remodeling or upgrading of the building or systems, through the incorporation of new technologies and concepts, usually aimed at valuing the property, change of use, increase of the useful life, Operational efficiency and energy "(NBR 15575-1, 2013, page 07). In this context, the objective of this work is to produce suggestions of possible energy conservation measures (MCE) in retrofit for an office building in the bioclimatic zone 02, relating the level of energy efficiency and its economic analysis, verifying the cost-benefit ratio of possible MCEs. The method is composed of the following steps: literature review, typological analysis of buildings in height with commercial use in the central area of Pelotas, choice of case study, analysis of the conditions of use and occupation of the chosen building, modeling and configuration of the existing building , Verification of the energy efficiency of the existing building (RTQ-C), energy diagnosis and verification of the possible MCEs applicable to retrofit, implementation of MCEs with analysis of the energy efficiency level (RTQ-C) and analysis of the economic feasibility of each MCE. The results of the work demonstrate the measures that provided greater energy savings and better cost-benefit, within the envelope, of the lighting system, air conditioning, equipment, and systems. The measures that were most advantageous with significant gains and that offset the investment were: the use of the XPS thermal insulation in the roof, the installation of the dimerization system and the implantation of photovoltaic panels in the roof of the building.