Abstract
Leakage reduction can save the energy consumption of the pump for water transport and chemical costs in accordance with the water purification. To reduce the environmental load siginificantly, it is important to minimise excess pressures of distribution netwroks with water distribution system as a fundamental aspect of leakage management strategy. Generally, the preventive maintenance schemes such as updating aging pipes and repairing water leakage can effectively reduce leakage, however, these scheme requires a large cost. On the other hand, the operation control schemes such as operating supply pumps and pressure reducing valves expect to contribute a large effect with respect to low cost.
In this paper, we focus on the operational control schemes and propose the idea to operate pressure reducing valves with relatively simple analysis. We have checked the excess pressure in a distribution network by analyzing the limited data acquired by a monitoring system and proposed an improved operation of pressure reducing valve. Through the solution above, the field data show the reduction of the minimum night flow, as a result , it brings about the effect of the leakage reduction.
