Principle of Equireliability at the Internal Water-Supply System Design

Novokhatniy, V.; Matyash, O.; Kostenko, S.; Epoian, Stepan

doi:10.1007/978-3-030-42939-3_65

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Ефективність роботи подавальнорозподільного комплексу систем водопостачання була і залишається постійно у полі зору українських науковців та фахівців з експлуатації систем водопостачання -від класичних робіт [1][2][3][4] до сьогодення [5][6][7][8][9][10][11]. Зрозуміло, що ці питання не меншою увагою користуються і у закордонних фахівців з водопостачання [12,13]…”

Section: Aналіз останніх дослідженьunclassified

Energy Saving Through Improved Topology of the City Water Network

Novokhatniy

Matyash

Usenko

2023

MEC

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This article compares the operation of the existing water supply system in the city Kremenchuk, Poltava region, namely the giving-distributive complex (GDC), which includes the main water network and the pumping station of the 2-nd lift, with the GDC, in which the topological structure has been improved by introducing a new section of the network. During the operation of the GDC, the tasks of repairing or replacing pipes of individual sections the water network constantly arise. At the same time, attention should also be paid to the topological structure of the water network during its reconstruction. The need to improve the topological structure is clearly seen after performing hydraulic calculations and building piezometric maps. For comparison, piezometric maps need to build before and after the reconstruction of the water network. At the nodal points of the network, a geodetic mark, free pressure and piezometric mark are shown. Considering that water moves from a larger piezometric mark to a smaller one, the directions of water movement and water network nodes with minimal free pressures are determined. At the same time, flaws in the topological structure are found on the piezomap, which should be eliminated in order to increase its dependebility. It is known that dependebility includes 3 components: reliability, maintainability and durability. Durability is ensured by the choice of pipe material during design. If we take into account simultaneously reliability and maintainability, then a complex indicator should be used, namely, the availability factor Ka. It estimates the probability that at any given time the section of water network is in working condition. According to the topological structure, the water network of the city should be looped and have more connections between nodes. But in practice, this principle can not always be maintained, given the planning structure of the streets the city. Graphical representation of hydraulic calculations using piezomaps allows you to identify overloaded sections of the water network and increase its dependebility. When improving the topological structure, it is necessary to use the prof. Novokhatniy principle, namely, new sections must be introduced so that they unite the existing nodes of the existing water network. Hydraulic calculations have shown that by improving the topological structure of the water network the city Kremenchuk, the annual energy saving is about 452 thousand kWh, which corresponds to a saving of about UAH 2.7 million per year (at the cost of electricity 6 UAH per 1 kWh). Keywords: water supply system, giving-distributive complex, water network, topology, energy saving.

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Section: Aналіз останніх дослідженьunclassified

Energy Saving Through Improved Topology of the City Water Network

Novokhatniy

Matyash

Usenko

2023

MEC

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“…І, накінець, в Україні питання надійності як споруд водопостачання, так і систем водопостачання у цілому не находять свого теоретичного вирішення за необхідності використання високого математичного апарату та відповідного рівня фахівців. Існують тільки рішення окремих питань, які свідчать про постійний інтерес до проблеми надійності [5][6][7][8][9][10][11][12][13] фахівців з водопостачання. За кордоном дані питання отримали набагато більше кінцевих рішень, про що свідчить видання навіть довідника [14,15].…”

Section: аналіз останніх дослідженьunclassified

Reliability of Water Treatment Facilities According to Operating Data

Novokhatniy

Kostenko

Matyash

et al. 2021

MEC

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The centralized water supply system from the water source to the consumer includes 3 main complexes: water intake, water treatment and supply and distribution. The reliability of water supply in the area depends on the reliability of each of these complexes, which, in turn, consist of a number of structures. The paper develops the developed principle of assessing the reliability of water treatment plants (WPP) by quantitative indicators of the quality of treated water. The assessment of the reliability of the current WPP was performed to reflect its work, which implements the "black box" model. That is, some process parameters have one value at the input and other values at the output. The disadvantage of this method is that it is impossible to assess the reliability if the process does not occur. In addition, it is impossible to assess the reliability of the BOC for another set of individual structures. And the advantage is the sufficient simplicity of calculating the reliability indicator. Data on the purification of the Dnieper water at the Kremenchug WPP in terms of turbidity and chromaticity are used. Graphs of average variable indicators of turbidity and chromaticity of Dnieper water at the entrance of the WPP and graphs of exceedances of maximum permissible concentrations of treated water are constructed. The main indicator of reliability for municipal water supply facilities is the coefficient of readiness of KD, and the basic indicators of reliability are the average operating time for failure T and the average recovery time of the TR. The possibility of calculating the coefficients KD downtime and KR readiness in case of exceeding the MPC treated water is shown. After analyzing the graphs of water quality indicators, it was determined that the greatest turbidity and chromaticity of the Dnieper water is observed in the autumn.

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