Iterative method for least-cost design and operation of pumping water distribution systems

This study is aimed at developing an economical dimensioning model for a water distribution system. The optimal solution minimises the system's total cost, which comprises the hydraulic network investment, plus the capitalised cost of pumping energy. The developed model, called Lenhsnet, may also be used to economically dimension projects to expand existing hydraulic networks. The methodology developed includes an iterative dynamic calculation process as well as a hydraulic simulation model. This model was tested in WDS The R-9 Network. The results obtained show the feasibility of this model, presenting it as a viable alternative for water distribution systems. The method is easily used, once it is performed under EPANET2 software interface.