Studying the Effects of Private Water Storage Tanks on Pump Scheduling Optimization and Leakage Control

The use of pumps in water distribution networks is very useful when there is a need for additional pressure head. However, the functioning of pumps can be influenced by the presence of private storage tanks in the network, which alters the way the users draw water due to their compensation ability. This condition is very common in areas affected by the historical scarcity of water resources or intermittent supply (Mediterranean Area, Arabian Peninsula, etc.). This paper studies the effects of private tanks on the performance of pumps in a network model, considering different retention times and evaluating possible effects on background leakages. A sample network and two real water distribution networks in the UAE will be analyzed. The results show that low retention time (i.e., 12 h) leads to a decrease in pump running time, thus lowering the energy consumption and carbon footprint, which gives a sustainable solution. These results, therefore, suggest that considering the presence of private storage tanks for the pump design in network models is of crucial economic importance, as well as for efficient designs and sustainable water distribution systems.