Dimensionamento de um sistema predial de água fria com medição individualizada e aproveitamento de água de chuva

Abstract

Throughout history, rain had been used in various ways by humans to supply their water needs. The use of rainfall in buildings is a relatively new practice as a measure of water conservation and its viability can be explained by the reduction of the demand for potable water from sanitation companies, and by consequence the lowering of costs related to potable water and the minimization of flooding risks during precipitation periods. Within this context, the present work, by promoting the dimensioning of rainwater harvesting system of a residential building, allows to know the elements of this system, the methods of sizing of the reservoirs and the distribution system of potable and non-potable water. This work establishes the fundamental concepts for the understanding of the project whose analysis and dimensioning were performed using mostly the Brazilian standards ABNT NBR 5626:1998 and ABNT NBR 15527:2007. Finally, the viability of the system was detected by observing the water volume saved by the use of rain water in the actuation of flushing valve of sanitary basins. So, was esteemed a possible recovery of investment in about 9 years.