Análise técnica e econômica da captação e uso de águas pluviais em uma edificação com diferentes tipos de coberturas

Abstract

Rainwater harvesting systems are sustainable solutions that help in the rational use of water, conserving this resource, thus aiming at the present study of technical and economic feasibility analysis of rainwater harvesting for non-potable consumption. in a residential building located in the Municipality of Formiga, Minas Gerais State, Brazil, comparing as technical particularities between capture in accessory roofs, wood structure and ceramic tile, and metal structure and steel tile, performing the hydraulic sizing and materials required, making a cost and economic analysis of rainwater catchment systems in both types of cover. It was used, as the object of study, the same residence with different coverage, which generated different water catchment areas and positions. By analyzing historical rainfall data of the municipality, it is estimated an average monthly production of rainwater. In addition, the demand for non-potable water was estimated, making it possible, therefore, to design the rainwater storage reservoir. When sizing or reservoir volume, it should be noted that there is no conventional roof in wood structure and ceramic tile, the Ripping method is most appropriate, while there is no roof in metal structure and steel tile, or the calculation model. most convenient is the English Practical Method. An economic savings made by the Simple Payback Method has already been analyzed, noting that the rainwater harvesting system is not economically viable for the simulated conditions, but it is viable when it comes to the environmental issue.