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UDC 628.168.3:628.147.22:620.193
Tchoukhin V. A., Bastrykin R. I., Andrianov A. P.
Investigating corrosion deposits in drinking water supply and distribution pipelines
Summary
The results of investigating the sludge and deposit structure in drinking water supply and distribution pipelines are presented. The literature and experimental data on the structure and composition of corrosion deposits on the pipe walls depending on water quality, pipe material, diameter and age were analyzed. The data on physical and chemical composition of deposits and photomicrographs of corrosion deposits received with the help of a scanning electron microscope are presented.
Key words
sludge , water quality , water supply and water distribution system , corrosion deposits , scanning electron microscope
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UDC 628.14:519.6
Novitskii N. N., Mikhailovskii E. A.
ISIGR Innovative software suite for the simulation of the operation modes of water supply systems
Summary
Energy and resource–saving reserves in the systems of water supply and distribution can be largely deployed by rational organization of the hydraulic modes of their operation with the use of advanced methods of mathematical and computer simulation. The description of a programming and computing suite that provides for the opportunity of using remotely the efficient methods of calculating the operation modes of water supply and distribution systems is presented. The principles of the suite implementation allow any number of users to make calculations anytime and anywhere provided the access to global Internet and standard Web browser is available. The suite underlying technologies are stated as well as its user options and computational performance. The results of pilot studies of the programming and computing suite are quoted. The application can be used in different branches (power economy, housing and public utilities, construction etc.) and fields of activities (engineering, operation, studies and education). It can be also useful for the experts of different levels – engineers, research workers, postgraduates, student, etc.
Key words
hydraulic condition , water supply and water distribution system , flow distribution , programming and computing suite , mathematical and computer simulation
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UDC 628.147.2.004.69
Ivashchenko G. I., Moiseev A. V., Riffel E. V., Shevchuk S. V., Yakimov S. Yu., Furmanova Yu. I.
Integrated Approach to Optimization of Operation of the Water Supply and Distribution System of the City of Omsk
Summary
An integrated approach to the optimization of operation of the water supply and distribution system of large cities based on hydraulic modelling with the use of modern software products is proposed. A possibility of adaptation to actual conditions of calculated results obtained by electronic simulation of water supply networks is shown on the example of Omsk. The solution of this problem makes it possible to model the necessary changes in the composition and mode of operation of each of the elements of a water supply network. The result of such an approach is reduction in the accident rate at networks and energy savings at pumping stations. Methods of execution of works, means of the measurement used, sequence of measures to be taken, the results obtained and possible prospects are presented.
Key words
zoning , pumping station , water supply and water distribution system , hydraulic modeling , power saving , reduction in accident rate , water supply reliability
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UDC 628.144:006.015.7
Bivalkevich A. I., Davydov A. B.
Optimization of water supply and distribution in the municipal water supply system
Summary
The integrity of the water distribution system of any city or community has been one of the main factors that provide for the reliability of the entire water supply system. When developing projects for the upgrade of water supply and distribution systems an actual state of movement of water flows in pipelines with steady losses should be obtained. Based on this data the water head in areas with low geodetic marks can be adjusted by installing network pressure regulators. Their use allows increasing the efficiency and integrity of the water supply system by reducing the failure rate in the areas of low and stabilized pressure as well as by reducing the static and dynamic load on the pipelines. The degree of reliability of the water supply and distribution system depends not only on the optimality of the decisions made at the design and construction stages but also on the set of measures for the operation of the facilities. Reduction of operating costs is achieved by optimizing operating modes and maintaining the technical and energy parameters of the structures that change with wear, aging, reducing the throughput capacity of the water supply and distribution system.
Key words
reliability , optimization , water supply and water distribution system , water exchange rate , zoning boundaries
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UDC 628.144.2:62-192
Chupin V. R., Dushin A. S.
Assessment of the customer water supply reliability
Summary
The operation mode of water supply systems is influenced largely not only by the probabilistic nature of the water consumption but also by the emergency situations occurring in the pipeline sections and at the facilities that also have probabilistic nature. Overlapping of these two random processes provides for the actual pattern of the water supply and distribution system operation. A method of determining the probability of trouble-free water supply of every customer on the basis of load flow task solutions with nonfixed water abstraction for all possible combinations of random water abstraction and emergency situation occurrence is proposed. The method provides for calculating for the existing or water supply system under upgrade the probabilities of supplying every customer with water in terms of 100% and 70% assurance, and concluding on the reliability of water supply in whole if the regulatory values are available. The method can be useful both in practical operation and design of prospective plans of water supply system development.
Key words
water supply , water supply and water distribution system , nonfixed water abstraction , probabilistic nature of water consumption and emergency situation occurrence , probability of trouble-free water supply to the customers
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UDC 628.142.001.24
Belyaev N. N., Sukacheva I. N., Radetskii Mikhail
Practice of Сarrying out Hydraulic Calculations on the Example of Water Supply System of the Right-Bank Part of Novosibirsk
Summary
One of the most important problems confronting the heads of water supply-sewerage services enterprises, – the reduction of energy and operating expenses for operation of water supply and water distribution systems, – is considered. Economic reasonability of a multiple-choice hydraulic calculation of the water supply network of the right-bank part of Novosibirsk is shown. As a result of the technological studies and a series of hydraulic calculations, the most rational (in the event of an increase in the volume of water consumption in the future) scheme of development of the water supply network of the city has been developed. In a complex with hydraulic calculations of the water supply and distribution system of the right-bank part of Novosibirsk a check calculation of the sufficiency of pure water tanks capacity has been carried out and the quality of water supplied to the consumer for revealing the corrosive-aggressive properties has been analyzed.
Key words
hydraulic design , water supply and water distribution system , mathematical model , pipelines capacity
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UDC 628.144.22
Riffel E. V., Shishov S. Yu., Tchernyayev D. D., Rodin N. V., Bychkov D. A.
Developing and implementing measures on pressure normalization in the water supply system of Tyumen city
Summary
The experience of introducing pressure regulators in the water distribution network of Tyumen city is presented. The procedure of designing the network operation parameters basing on hydraulic simulation with the use of advanced software is set. The possible efficient long-term use of pressure regulators under subzero weather conditions typical for Siberia is shown. The practical experience of the equipment installation and adjustment is laid out; the specific features of the equipment operation are considered. Based on the pipeline failure number the analysis of the efficiency of the measures on the free head normalization in the network is carried out. The installation of pressure regulators in the Tyumen water distribution network resulted in the failure rate reduction and power saving at the pumping stations.
Key words
water supply and water distribution system , pressure regulator , hydraulic modeling , reduction in accident rate , water supply reliability
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UDC 628.144:006.015.7
Neparidze R. Sh., Urakin M. V., Belyaev N. N., Sokolov A. I., Kovyrshina R. N., Neliubina A. A.
Results of hydraulic calculations of the water supply and distribution system in Tobolsk, the Tyumen Region
Summary
The progress of process surveys and hydraulic calculations of the water supply and distribution system of Tobolsk by the specialists of «RVKN» LLC (Moscow), PAO «Sibirsko-Ural’skaia Energeticheskaia Kompaniia» (Tyumen) and its Tobolsk branch are covered. The work is based on the theoretical foundations and methods in the field of hydraulic calculations of water distribution networks carried out by leading Russian research workers, as well as the rich experience of numerous similar works carried out by the specialists of «RVKN» LLC in previous years. Process surveys included an on-site survey of the water distribution system rating the relevant characteristics of pumping equipment and a manometric survey. In the course of hydraulic calculations 25 different options were considered that involved seasonal changes in the modes of operation of the municipal water supply system with account of the compliance with the fire extinguishing requirements. At the same time special attention was paid to including the newly commissioned (upgraded) Sokolovsky water intake facilities. The analysis of the calculation results showed a low relevant process and structural reliability of the water supply and distribution system, especially of the currently operated Zhukovsky water intake facilities. The stage-by-stage program for the development of the municipal water supply and distribution system (WSDS) provided for the measures aimed at the optimization of the operation in the coming years, as well as the development of a reliable and prospective water supply scheme for Tobolsk.
Key words
assessment of technical state , hydraulic design , mathematic modelling , water supply and water distribution system , manometric survey , detailization and simplification of the calculation model , surplus hydraulic head , inefficient water losses , relevant characteristics of pumping equipment , process and structural reliability
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UDC 628.144.23.001.23
Novitskaia O. S.
Taking into account the actual conditions of water consumption
in hydraulic designing water distribution networks
Summary
Pipeline hydraulic estimation is a basis of the process and technical-and economic, optimization, in particular, design of water supply systems. Improving hydraulic design of the water distribution networks with due account for the actual water consumption is a topical task; whereas estimation of the water flow rate dependence from free head values is an important and essential basis for calculations. The method of hydraulic design of water distribution networks with account of water flow rate dependence from free head values in the zones of both deficient and excessive head was developed and presented. To account for water losses the correlation factors of total water losses and total consumption, between water loss values in residential buildings and between total water loss values were introduced. The exponents reflecting water flow rate variation at nodal points were introduced. GRS NEW software for the hydraulic estimation of the joint operation of the entire system of water supply and distribution was improved. The software takes into account water flow rate increase at every nodal point depending on the available water head and allows identifying the problem points.
Key words
losses of water , water supply network , head , water supply and water distribution system
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