Metodologia de planejamento de planta fotovoltaica integrada à edificação: estudo de caso para o Instituto da Primeira Infância (IPREDE)

Abstract

This paper aims at comparing and demonstrating the financial feasibility of the electric power generation by photovoltaic (PV) modules in addition to the electricity of the local utility of the State of Ceará. The performance of a hypothetical PV system connected to the network and integrated with the architecture of the Instituto de Primeira Infância (IPREDE) is evaluated. RETScreen and SketchUp are used to analyze the financial feasibility of the project and to assist in deciding the location of the PV panels, respectively. SketchUp allows you to model the building under study and then perform shading analysis. Shading analysis is done by varying the months of the year and the time of day to see how the shadows on the roof of the building behave. At the end of the modeling RETScreen is used, a didactic tool and easy to use, because with the result of financial feasibility and modeling together it is possible to decide more precisely which case is the best to choose. In the study, three cases are proposed, in which the former aims to meet 75% of IPREDE's electricity demand through FV generation, in the second case to meet 50% of the account and finally, the third case that intends to supply 25% of the demand. The best case to choose is case 2, since it has a lower payback time than case 3, and, according to the modeling, it occupies less area than case 1. Thus, the PV panels do not have to stay in places of low efficiency. Case 2 has 47.74 kWp with a total cost of R $ 294,140.00, a time of capital return of 5.3 years and occupies an area of 341 m². The efficiency of the methodology used is proven at the end of the study, because it was possible to define the most efficient case for IPREDE.