Avaliação econômica do sistema de iluminação externa do bloco CJ.

Abstract

This work presents a case study involving the CJ building of the university, focusing on the design and economic evaluation of a new external lighting system, powered by an off-grid photovoltaic generator. With energy costs rising, concerns about energy efficiency becoming increasingly evident and the growing trend experienced by distributed generation, in the case in particular of photovoltaic solar generation, the possibility of doing a study combining these three situations, being the main motivation in the development of this work. For the elaboration of the same, were used data of the consumption of the building, simulations in modeling program and spreadsheets of calculation, always observing the norms and conventions in force. The results obtained in the study showed that, the system is economically feasible, contributing to a reduction of up to 15% of the monthly energy consumed in the building and saving, over its useful life, just over 57 thousand reais, being about 3,7 thousand only in the first year of operation. However, it was observed that, compared to the total energy expenditure of the institution, this economy would be equivalent to a monthly reduction in the electricity bill of only 0.11%, it takes more than this project to have a truly expressive economy.