Balanço hídrico e energético de um sistema predial de aproveitamento de água de chuva / Water and energy balance of a rainwater harvesting system for a building gutter
AUTOR(ES)
Aline Chieka Jó
FONTE
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia
DATA DE PUBLICAÇÃO
29/04/2011
RESUMO
The use of rainwater as an alternative source of water supply is a practice on the rise, mainly for its importance in conservation of water resources. However, the user often ignores the energy that this system may require, and depending on its design, can be considered a relevant factor in its application. The conceptions and components of a rainwater harvesting system vary depending on the needs of each user and its final destination. There are simple systems made with basic equipaments and reservation processing, and complex systems involving automated equipments, which generally require energy, such as lifting pumps and disinfection systems. Therefore, this paper presents a theoretical and equational model, applicable at any building to realize a rainwater harvesting system, from which you get an energy value index for each volume of rainwater effectively utilized by the system. From this model, it is also possible to check the system s efficiency and viability, both in conservation and economic question. As an example of an applied model, the rainwater harvesting building system installed on the campus of the Institute for Technological Research of São Paulo (IPT) was used, which directs rain water to wash the kitchen floor and the cafeteria of this site. An average rate of 3,17 kWh/m³ was obtained, considered elevated when compared to public supply systems, that on average attains rates of 0,60 kWh/m³, and other systems with 0,05kWh/m³. This high rate is related to the energy consumption of the ozone disinfection system, not with the hydraulic pump, as had been assumed initially. The payback period is five to six years. In conclusion, the theoretical model will serve as an evaluating tool of the rainwater harvesting system in study, so that the designer or user can optimize it, considering the particularities of each situation
ASSUNTO(S)
Água energia balanço energético water energy energy balance
ACESSO AO ARTIGO
http://libdigi.unicamp.br/document/?code=000801450Documentos Relacionados
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