bbk 000000
УДК 628.179
Strelkov A. K., Biriukov V. V., Egorova Yu. A., Zaiko V. A., Bykova P. G.
Analysis and assessment of water distribution network failures in Samara
Summary
The main task of the water distribution network maintenance and operation service is improving the quality and reliability of supplying water to the customers. The analysis of the water distribution network state in the urban district of Samara showed that the majority of the pipelines had been significantly depreciated. This is caused by fact that they were laid and put into operation during the period of large-scale housing construction (1960–1980-ies) without due account of the requirements to the durability of the materials applied and technical and organizational capacity of the operating companies. According to the statistics lately the rate of failures in the water distribution networks has been gradually but sustainably reducing. The assessment of the data on the operation and maintenance of the water distribution networks showed 22% reduction of the total number of failures in 2015 compared to 2013; accordingly water losses also decreased. Achieving these results was possible due to the timely repair and maintenance works in 2013–2015.
Key words
water supply network , breakdown rate , water leaks , pipe material , pipeline failure
|
bbk 000000
UDC 628.17.001.4
JUDIN M. Iu., Melnik E. A., Hyamyalyainen M. M., Smirnova S. V.
Hydraulic model in the water distribution network operation control in the city of Saint-Petersburg
Summary
The experience of Saint-Petersburg Vodokanal applying hydraulic models of the water distribution network in tackling most complicated technical problems is described. The process of establishing a comprehensive system of water supply management includes multioption hydraulic calculations and assignment of the control points to control the operation of pumping stations. The investigations of the network resistance are carried out, models are specialized and new simulation trends are developed. The development of information systems that supply the initial data for the models as well as data exchange provide for improving the accuracy of the calculation results and introducing new calculation types.
Key words
water supply network , information system , breakdown rate , hydraulic model , control points in the distribution network
|
bbk 000000
UDC 628.1:3:65.012
Biriukov V. V., Strelkov A. K., Atanov N. A., Zaiko V. A.
Criteria for evaluation of the «Samarskie Kommunal’nye Sistemy»’s activities for 2012–2015 period
Summary
The data on the activities of «Samarskie Kommunal’nye Sistemy» LLC in achieving the criteria set in the municipal property – Samara water supply and wastewater disposal systems – leasing contract of March 14, 2012, for three years are quoted. The criteria include: reduction of the failure rate of the water supply system; reduction of sewer blockages; reduction of the specific power consumption in water supply; reduction of the specific power consumption in wastewater disposal; reduction of water losses. The actual data on the operation of «Samarskie Kommunal’nye Sistemy» LLC for 2012–2015 period proves conclusively that all the five criteria of the technical performance indicators set in the leasing contract have been fulfilled by the target date. The amounts of finance and measures that provided for meeting the requirements of the tender application are presented.
Key words
losses of water , breakdown rate , criteria of water supply and wastewater disposal , specific power consumption , sewer blockage
|
bbk 000000
UDC 628.15.004.69
Radetskii Mikhail, Davydov A. B., Kolevatov I. A.
Optimization of Operation of a City Water Supply System
Summary
Methods of the optimization of operation of a municipal water supply network of the city of Novosibirsk are presented. A number of variants of installation of reducing valves on different sites of the water supply network at the neighbourhoods Pashino (to itself) and Severny (after itself) of the Kalininsky District of the city are considered in detail. The results of the operation of various pressure regulators and frequency converters used at water supply pumping stations during the last few years are given. As a result of the installation of pressure regulators on sections of the water supply network of the Pashino and Severny neighbourhoods of Novosibirsk the total pumping capacity of stations Drinking Centre and Heat-and-Power Station-4 (HPS-4) has been cut by 10–15% and the pressure at the fourth-stage pumping station (HPS-4) has been reduced by 10 m H2O. At the same time the breakdown rate of the water supply networks of the neighbourhoods has dropped by 10–20%.
Key words
water supply network , pumping station , pressure regulator , frequency converter , excessive head , breakdown rate
|
|
