Measures for reducing the probability of damages in water distribution networks

Summary

Measures for reducing the probability of damages in water distribution networks under certain technological operating conditions are considered. The experience of using a valve that prevents water surge in combination with a pressure relief valve is presented. Installing a valve that prevents water surge in the pressure manifold of pumping stations provides for the effective protection against damages of pressure water conduits in case of a sudden stop of pumps, as well as in case of a sharp uncontrolled pressure increase in them. Analyzing the operation of a multifunctional water surge protection valve with the remote control and function of maintaining the set pressure upstream proved a smoother pressure change at the outlet of the booster pumping station, as well as smaller deviations of the actual value from the set value as the volume of process water supplied changes. It is shown that the equipment is effective in the absence of variable speed control units, as well as in emergency situations.

Key words

water supply networks , pressure reducing valve , surge protection , surge protection valve

Optimization of water supply system of the left bank districts of Novosibirsk

Summary

For the past 15 years a package of measures has been implemented in the Novosibirsk water supply system with the introduction of advanced equipment and technologies that provided for significant improving the reliability and efficiency of operations. The measures included installing variable-speed drives on pumping units; changing-over the operation of the pumping station to the remote control point operation, introducing pressure control system etc. To ensure the control over the water supply operation the activities on establishing automated pressure control in the water distribution network were initiated. At present 32 pressure control points have been established in the city left bank districts that allow real-time tracking the network operation parameters. All the pumping stations and most important points of the water distribution network were equipped with pressure sensors. The experts of Gorvodokanal of Novosibirsk MUE introduced a software package with the purpose of: monitoring and analyzing water consumption in water supply zones; analyzing the energy efficiency of equipment operation; monitoring and analyzing pressure losses in the water distribution network. The measures on optimizing the water supply system operation implemented in Gorvodokanal confirm that the systems designed and built in 1960–1980-ies have a big potential for upgrade. The upgrade will provide for significant reduction of operating costs and improvement of the water supply quality.

Key words

water supply system , frequency converter , hydraulic model , remote control point of the network , pressure reducing valve

Improving the operation of the Novosibirsk water supply system

Summary

In Novosibirsk over the past 20 years a set of measures has been implemented using equipment and technologies that have significantly improved the reliability and efficiency of the water supply system. Networks and facilities of the water supply system designed and built in the 1960–1980-ies have a large reserve for upgrade that will allow significantly improving their efficiency, reducing operating costs and improving the quality of water supply. As a result of the measures taken the company not only provides for the high-level water supply in the context of limited financial resources but also ensures the development of the city.

Key words

water supply system , energy efficiency , frequency converter , pressure reducing valve , most remote point , water consumption monitoring