Análise econômica entre dois sistemas fotovoltaicos, integrados à edificação e em posição ideal, no município de Cacequi - RS

Abstract

The present study exposes the equipment and fundamentals of photovoltaic microgeneration, synthesizes the design steps and system design for two installation situations of the modules: scenario (1) - modules installation integrated with the existing building - and, scenario (2) Modules installed in the ideal position of maximum generation - also economically analyzes each of the situations comparing them. Such comparison was made in a mixed use building in the city of Cacequi - RS. The method developed to perform the work was divided into four steps: data collection, photovoltaic system design, economic analysis for both situations and comparison between them. The economic analysis shows the profitability of the systems proposed in both the scenario (1) and the installation in scenario (2), based on the economic indicators of discounted payback, NPV and IRR. Regarding this analysis, for the two situations of installation of the proposed modules, economic differences are practically irrelevant. It is assumed that the scenario (2) configuration provided a reduction of 2.79% in the initial installation cost. In addition, investment was slightly more viable, with a reduction of about one month in its turnaround time, a 0.29% NPV reduction and an increase in the IRR of 1.05% when compared to the scenario (1). Finally, it is concluded that even buildings not designed to have the maximum potential of photovoltaic generation can receive these systems without changes in their volumetry and yet have near-ideal cost and time of return without compromising generation.