Resumo

SOLORZANO-VILLARREAL, Johan Oswaldo; GOMEZ-NUNEZ, Jersain  e  PENARANDA-OSORIO, Caudex Vitelio. Methodology to estimate the relationship of water consumption and rainwater harvesting system in a building located at the Universidad Autónoma Metropolitana, Azcapotzalco, Mexico. Tecnol. cienc. agua [online]. 2019, vol.10, n.6, pp.178-196.  Epub 15-Maio-2020. ISSN 2007-2422.  https://doi.org/10.24850/j-tyca-2019-06-07.

The Azcapotzalco campus, belonging to the Universidad Autónoma Metropolitana located in Mexico City, has been experiencing a shortages of drinking water in recent years. This paper is the result of searching for mitigation alternatives, where a methodology is presented to estimate the ratio: rainwater volume collection, storage and usage in a building within the University. The amount of rainwater that can be collected, is estimated by performing a statistical analysis over the historical data representing rainfall, and the same time, by evaluating effective collecting areas over the rooftop of the building. A demand curve is obtained by obtaining samples in the toilets at different days and hours, which are believed to be representative of common periods in the University. The implementation of a storage tank, will allow the storage of rainwater when this is abundant, thus enabling for its usage when scarce. To this end, three tank are studied, with the purpose of evaluating which one will be the most suitable. This paper presents a methodology intended to identify the viability of a rainwater harvesting system and different capacities of storage tanks. Finally, the system is simulated with rain records corresponding to the year 2015 to figure it out what the system performance would have been. The results present the conditions for which the system is self-sufficient or needs an external endowment.

Palavras-chave : Rainwater harvesting; estimation of water self-sufficiency; simulation of tank operation; supply and demand in school buildings.