| Resumo: | The energy costs due to pumps operation in Water Supply Systems (WSSs) constitute a large quota of the global costs. Pumps control optimisation can provide considerable improvements in WSSs efficiency since most of the times their operation reveals to be completely inefficient. A numerical methodology to optimise both the rotational speed and the operating time of variable-speed pumps is proposed. For the automatic application of such methodology in distinct networks, a computational tool combining EPANET 2.0 with an optimisation module was developed using C++ language. In the presented case-study, the use of a Particle Swarm Optimisation (PSO) algorithm with the proposed methodology allowed to reduce significantly the energy costs associated to water pumping.
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