Levent DORUK, Nuri MERZI IWRA Member, Middle East Technical University, Civil Engineering Department, 06531 Ankara, Turkey
Energy costs regarding pumping discharge lines constitute the most important item in the budget of the water utilities in relation to municipal water distribution networks. Selection of the efficient pump combination during operation might reduce energy costs. For the correct choice of pump selection, characteristics of the transmission lines and network pipes, actual pump performance curves, daily demand curve should be known for defining the task. The definition of the task denotes the increase of the storage tank of the system from a given level to a certain level during a specific period of the day. Different examples were worked out using SCADA data using geographic information systems (GIS). It was found out that efficient pump combinations reduces energy costs considerably. The magnitude of the savings varies 5%-10% depending on the case studied.