Importance of appropriated sectorization to reduce real water loss in public supply system. / Importância da setorização adequada para combate às perdas reais de água de abastecimento público.

AUTOR(ES)

Renato Gonçalves da Motta

DATA DE PUBLICAÇÃO

2010

RESUMO

The following study aims to present the effect of pressure reducing in the distribution networks over the water real loss. For development of the studies, were collected field data that allowed to evaluate the distribution systems conditions and build mathematical models for hydraulic simulations. From the hydraulics models, were developed cases for the Water Supply Ermelino Matarazzo District (in São Paulo) and the Fonte District (in Araraquara). In the Ermelino Districts case, in fact were deployed pressure reducing valves (PRVs) sub-districts, resulting in significant reductions in the supplied flow to the distribution system. For the Fonte District, studies were developed to reformulate the existing sectorization and the subdivision into District Meter Areas (DMAs) taking into account all the activities for improvement and adjustment of the distribution system. The proposal to subdivide the Fonte District had not been effectively implemented, but the models developed showed that only the sub-sector division is enough to reduce the pressure distribution and therefore reduce real losses. For Ermelino District was chosen the solution with immediate results through the installation of the valves: the actual losses have been reduced, meaning that although 80% of the network extension of the High Service Area has been protected by PRVs, which suggests an energy waste. In the Fonte District sought an embracing solution for the distribution system optimizing and gain the best hydraulic balance of the piezometric plan, that also provides satisfactory results in the reduction of real losses. Finally, it was concluded through the results obtained in both studies that, the pressure reduction in distribution system is closely linked to the real losses reduction. The difference between them is the scope of the studies. It is desirable that the immediate results achieved by the PRVs installation be compared with long-term actions and, the use of PRVs should be an accessory to the distribution system and not used indiscriminately.

ASSUNTO(S)

distribuição de água water distribution perdas de água water loss

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