Análise de viabilidade econômica de sistemas fotovoltaicos em empreendimentos habitacionais de interesse social

Through bibliographic research and investigation of real market values, the investment involved in the construction of a residence with the basic standard project of COHAB (MG-90-I-2-41) was assessed and the financial viability of the addition of a photovoltaic microgeneration system in the project or its inclusion in replacement of the thermosolar heating system. Social projects aim to reduce the inequality among society levels and to restore the dignity of the most sacrificed” (FONTES, 2019). In the state of Minas Gerais there is a very well succeeded program developed by COHAB (Social Housing Company of the State of Minas Gerais) created in the 60's and lasting until the present day giving access to owning houses to the low income people from Minas Gerais. The standard project used by COHAB (Social Housing Company of the State of Minas Gerais) in the construction of these houses was updated in 2012, which included a solar-based water heating system. This was an important change for the social project, in addition to determining the reduction in energy demand for the network where these projects are installed, reducing the electric bill of the resident and increasing value to the project. This work intends to verify the economic feasibility of the installation of an energy microgeneration system based on Photovoltaic plates in one of the COHAB design patterns. As well as to verify the option of replacing the solar thermal plates with the use of electric showers and their financial implications in the initial investment for the project and in the amount money to be paid by the beneficiary, taking into account the consequent reduction in the electricity bill of the proposed change. Both situations showed feasible form the economic perspective, as their respective payback were set as ten years and one month and four years and tree months respectively, considering a system lifespan of twenty five years.