The pressure-boosting pumping stationsin modernization of water supply systems
Based on the acknowledged theoretical proofs and experiences in the modernization of water supply systems, it can be concluded that out of the range of available measures to reduce leakages, the regulation and/or reduction of operating pressures is being recommended as the most efficient method thereto. The known proof-theoretical papers on water supply system leakage and the corresponding operating pressure losses advocate thesis on possibility to reduce the level of operating pressures to the range of 3.5-2.5 bars, in all parts of the network where applicable, which is evidenced to be a sufficient level enabling the uninterrupted operations of the large percent of the users. The justification of the previously stated attitude can be proved by means of simple schemes of supply line which correspond to the possible states that can occur in actual operating modes of the water supply system. An analysis was performed with focus on the location and role of the pressure-boosting pumping stations used to increase the pressure in achieving the new low-pressure state and their respective influence on techno-economic parameters upon which a decision is made on economic viability of the solution concerned.