Simulação termoenergética para conversão de uma edificação pré-existente em uma edificação com energia líquida zero

Abstract

Due to the high costs related to energy consumption and the increasingly stringent environmental requirements regarding the emission of pollutants, the search for incre-asingly energy efficient buildings has been an issue increasingly addressed both in the design phases of new buildings, and in the improvement of existing buildings. The present work seeks economically and structurally viable alternatives to improve the energy efficiency of a single-family residence built in the 1980s, in the city of Itaqui, RS. In addition, we seek to dimension a photovoltaic energy system that can supply the entire annual energy demand of the residence, so that the net energy balance is zero, thus making it an NZEB (Net Zero Energy Building). Through the thermoenergetic analysis program EnergyPlus v9.5, it was possible to simulate the thermal behavior of the building for the climate of the West Frontier of the state of Rio Grande do Sul. After determining that the most economically viable improvements would be to change the painting of the building, the implementation of new glass and the implementation of thermal insulation, an estimate of the reduction in the structure’s annual energy consumption was obtained. As a result for the Energy Baseline, the simulation obtained an annual consumption of 11899.73kWh. After implementing the improvements, a reduction of 11.84% was achieved, reducing annual consumption to 10640.36kWh.