scholarly journals Reliability of water fittings in operating conditions

2021 ◽  
Vol 263 ◽  
pp. 04010
Author(s):  
Alexander Svintsov ◽  
Evgeniy Alekseev ◽  
Svetlana Shambina ◽  
Roman Fediuk ◽  
Vladislav Fominov
Keyword(s):  
Water Supply ◽  
Residential Buildings ◽  
Operational Reliability ◽  
Probability Of Failure ◽  
Technical Condition ◽  
Supply System ◽  
Operating Conditions ◽  
Random Coincidence ◽  
Reliability Indicators ◽  
Residential Neighborhood

Water fittings are an integral part of the internal water supply system. The reliability of their work under operating conditions largely influence on the continuity of water supply to the population. The reliability indicators of sanitary fittings allow the services responsible for the technical condition of the indoor water supply of houses to pay priority attention to the factors that determine the uninterrupted water supply of the population and reduce the loss of drinking water. In this study, the results of indicators of operational reliability of faucets for sinks in kitchens and washbasins in toilet rooms of apartments of multi-store residential buildings in a residential neighborhood are presented. The study was performed based on the analysis of records in the logs of data on valve failures for 2016-2018. The main malfunctions are established, the random coincidence of which leads to failures. The reliability of sanitary fittings is affected not only by their structure and the characteristics of the materials, as well as by the exploitation conditions. The probability of failure-free operation of sanitary fittings in exploitation conditions for a time not exceeding the duration of the reduction of water supply to consumers in residential buildings is the basic parameter of its reliability.

scholarly journals The Analysis of Water Supply Operating Conditions Systems by Means of Empirical Exponents

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2452
Author(s):  
Justyna Stańczyk ◽  
Ewa Burszta-Adamiak
Keyword(s):  
Water Supply ◽  
Flow Rate ◽  
Analysis Data ◽  
Technical Condition ◽  
Supply System ◽  
Water Supply System ◽  
Operating Conditions ◽  
Water Supply Systems ◽  
Diagnostic Systems ◽  
Water Companies

The stochastic character of water consumption by consumers and the technical condition of water supply systems are the main deterministic random factors influencing the observed changes in flow rate and pressure. The implementation of Supervisory Control and Data Acquisition (SCADA) systems resulted in the creation of dispersed data sets coming from the devices controlling the operation of the water supply system. Thanks to the use of metadata and advanced computer systems of analysis, data from various sources can be analyzed to detect the operating conditions of the water supply system. The aim of the research was to analyze an empirical exponent, determined on the basis of flow rate and pressure measurements for one of the District Metered Areas (DMAs). Modern supervised and unsupervised machine learning systems were implemented to classify the obtained results. The results of the research showed that on the basis of the established empirical exponent in the systems in which the pressure is reduced at night, it is possible to qualify the operating conditions of the water supply system in the DMA with accuracy of up to 90%. The conducted tests may be implemented as a component of expert diagnostic systems in water companies.

scholarly journals Improving of the quality and reliability of water supply systems on the basis of modern information and computing technologies

2018 ◽  
Vol 39 ◽  
pp. 04003 ◽  
Author(s):  
Aleksandr V. Alekseev
Keyword(s):  
Water Supply ◽  
Operational Reliability ◽  
Operating Conditions ◽  
Mode Analysis ◽  
Water Supply Systems ◽  
Common Information ◽  
Quality Of Water ◽  
Common Information Space ◽  
Hydraulic Conditions ◽  
Supply Systems

The article deals with the issues of increasing the reliability and quality of water supply systems operation on the basis of modern methods and software complexes for the analysis and development of hydraulic conditions. Against the backdrop of the analysis of the literature on the problem of reliability, the relevance and insufficiency of attention to maintaining the required level of reliability at the stage of water supply systems operation are revealed. The main factors that affect on operational reliability are considered. These factors are largely associated with the competent organization of operating conditions of water supply systems. A brief description of the «Angara-WS» computer program for solving the problems of analyzing and developing of hydraulic conditions, as well as the experience of its practical application, is given. A special feature of this complex is its universality, the possibility of multilevel representation of models, the execution of one-and multi-level calculations, integration into a common information space of the enterprise, automation of the processes of mode analysis, accumulation and analysis of damage statistics.

scholarly journals Influence of residential complex construction on the condition of the sewage collector and the underground water supply system in Kyiv on A. Barbyusa st.

2018 ◽  
Vol 2 (51) ◽  
pp. 115-123
Author(s):  
Valerii Shuminskiy ◽  
Serhiy Stepanchuk ◽  
Yaroslav Dombrovskyi ◽  
Svitlana Kostetzkay ◽  
Yegor Kostochka
Keyword(s):  
Water Supply ◽  
Strain State ◽  
Underground Water ◽  
Technical Condition ◽  
Supply System ◽  
Water Supply System ◽  
Design Features ◽  
Stress Strain ◽  
Complex Construction ◽  
Main City

The article presents the design features of a residential complex located in the Barbyus street in Kyiv. The main city sewer and water supply is the basis of the residential designed complex. It is necessary to consider the possible impact of new residential complex construction on the sewer and water supply. To assess this effect, the stress-strain state in the soil around the collector and water supply system has been analyzed. Conclusions are drawn concerning the technical condition of the sewer and water supply system after residential complex construction  and its further operation.

scholarly journals RESEARCH AND EVALUATION OF FUNCTIONAL PARAMETERS OF LOW VOLTAGE DEVICES

2018 ◽  
Vol 20 (5-6) ◽  
pp. 13-21
Author(s):  
E. Gracheva ◽  
A. Safin ◽  
R. Sadykov
Keyword(s):  
Contact Resistance ◽  
Low Voltage ◽  
Experimental Studies ◽  
Threshold Value ◽  
Probability Of Failure ◽  
Technical Condition ◽  
Operating Conditions ◽  
Switching Device ◽  
Predicting Performance ◽  
Complete Contact

To assess the operability and technical condition of low-voltage devices, it is proposed to use the resistance of contact connections. The probability of failure-free operation is proposed to be evaluated by the dependence of the resistance of the contact connections of the apparatus on the number of switching operations. As a result of wear, the initial value of the contact resistance of the switching device increases and reaches a critical value at which the switching device fails. Due to the fact that in the process of research there are both complete contact failures and short-term switching of only one time, the contact resistance is exceeded by the contact resistance of the threshold value. For magnetic starters, circuit breakers and contactors, based on the results of the experimental studies carried out, in order to achieve the critical resistance value of the apparatus, аn average of three times the initial resistance. At the same time, the quantitative characteristics of the functioning efficiency are determined by the methods of probability theory and mathematical statistics. The set of the obtained quantitative indicators allows to determine the actual level of reliability of contacting, and also extends the possibility of predicting performance ratings in the design.  In the present article, a method for the complex evaluation of the efficiency of low-voltage apparatus has been developed and the laws of the change in the resistance of contact connections and the probability of failure-free operation of low-voltage switching devices have been revealed, depending on the operating conditions.

Bayesian model of urban water safety management

2014 ◽  
Vol 16 (4) ◽  
pp. 667-675 ◽  
Keyword(s):  
Water Supply ◽  
Tap Water ◽  
Water System ◽  
Operational Reliability ◽  
Supply System ◽  
Water Supply System ◽  
Main Task ◽  
Urban Water ◽  
Water Safety ◽  
Operational Conditions

<p>Water supply system is a critical infrastructure. Main task of urban water system is to provide consumers with drinking water in adequate quantity, at the required quality and pressure corresponding to current standards.</p> <p>For the purposes of this paper, operational reliability of the water supply system is defined as the ability to supply a constant flow of water for various groups of consumers, with a specific quality and specific pressure, according to consumers demands, in specific operational conditions, at any or at a specific time.</p> <div> <p>The main aim of this paper is to present a method for risk analysis using Bayesian process. The proposed method made it possible to estimate risk associated with the possibility of partial or total loss of the ability of water supply system operation. The paper proposes to consider two types of risk: the first type, associated with the possibility of interruptions in water supply and the second type, associated with the possibility of tap water contamination.&nbsp;</p> </div> <p>&nbsp;</p>

scholarly journals Rational designing of the internal water supply system in reconstructed residential buildings of mass standard series

2018 ◽  
Vol 144 ◽  
pp. 01016
Author(s):  
Evgeny Orlov
Keyword(s):  
Water Supply ◽  
Residential Buildings ◽  
Supply System ◽  
Water Supply System ◽  
Water Supply Systems ◽  
Resource Saving ◽  
Water Line ◽  
Head Losses ◽  
System Reconstruction ◽  
Water Mains

The issues of water supply system reconstruction in mass series buildings are reviewed with consideration of water- and resource saving. Principal points for location of plumbing cells in apartments, arrangement of water devices and wastewater receivers, selection of pipelines for reconstructed water line are described. Comparative analysis of design variants of inner water line before and following reconstruction are given. It was found that applying the developed system design approaches the head losses in the inner water supply line will be significantly decreased as well as the water mains length will be decreased with material and installation saving. Based on the data the conclusions on necessity to review standard arrangement solutions of water supply systems in the reconstructed buildings were made. Recommendations on water loss reduction in the system by installation of special water saving fittings on water devices and touchless faucets.

scholarly journals Assessment of leakage management in small water supplies using performance indicators

2021 ◽  
Author(s):  
Iwona Klosok-Bazan ◽  
Joanna Boguniewicz-Zablocka ◽  
Aneta Suda ◽  
Ewelina Łukasiewicz ◽  
Dorota Anders
Keyword(s):  
Water Supply ◽  
Water Loss ◽  
Performance Indicators ◽  
Supply System ◽  
Water Supply System ◽  
Lessons Learned ◽  
Operating Conditions ◽  
Water Losses ◽  
Leakage Reduction ◽  
Small Water

AbstractThe revision of the Drinking Water Directive (DWD), which the process of consultation by the European Parliament is coming to the end, includes a commitment for all Member States to assess the level of water leakage. The overarching aim of this action is to reduce water loss through leaks. In regard to this, use of performance indicators as suitable to enable assessment of water utility performance with regard to leakage reduction, including impacts on environment and cost-efficiency, is recommended. The paper provides results from water losses evaluation with the set of performance indicators (PI), considering dependence on the availability of resources and specific operating conditions. An analysis of different PI that are necessary to evaluate in most of leakage reduction methods was conducted considering step-by-step approach. Furthermore, the most relevant data for leakage analysis and management on a network level was determined. Presented PI can be used to improve leakage management of small water supply system. Similarly as in the Deming cycle, the described tool provides for planning activities, executing activities in accordance with the plan, checking the degree of execution of objectives included in the plan, and on the basis of conducted analyses and lessons learned, the so-called improvement. The results of the analysis lead to the conclusion that through a comprehensive, systematically improved strategy, the high effectiveness of the system could be reach. The reliable monitoring does not have to be based on advanced technological methods, which are often unavailable for small water supply system, due to high investment and operating costs. The results indicate that integrated IT systems, as SCADA, might not be directly beneficial to water loss management in small networks with moderate leakage levels.

scholarly journals Water Loss Analysis as an Element of Operation Management of Water Supply System

2019 ◽  
Vol 49 (2) ◽  
pp. 55-77
Author(s):  
Jakub Żywiec ◽  
Barbara Tchórzewska-Cieślak
Keyword(s):  
Water Supply ◽  
Failure Rate ◽  
Water Loss ◽  
Technical Condition ◽  
Supply System ◽  
Water Supply System ◽  
International Standards ◽  
Water Losses ◽  
Safety Level ◽  
Water Supply Company

Abstract The aim of the study was an cause and effect analysis of water losses in the collective water supply system of the city located in south-eastern Poland. The exploitation data provided by the water supply company from 2012 - 2016 was used for the analysis. The study uses the recommendations of the IWA (International Water Association) for the water balance making and determination of water loss indicators. The values of water loss indicators were compared to international standards and the technical condition of the network was determined. In addition, failure rate analysis of the water supply network was performed based on the failure rate index λ. Based on the performed analysis, it was found that the water supply company should consider renovation or replacement of the main network pipelines to increase the safety level of water supply, reduce the amount of water losses and the company exploitation costs.

scholarly journals Prognosis of the technical condition of masonry walls in residential buildings

2014 ◽  
Vol 13 (3) ◽  
pp. 027-032 ◽  
Author(s):  
Beata Nowogońska
Keyword(s):  
Distribution Function ◽  
Residential Buildings ◽  
Rayleigh Distribution ◽  
Operational Reliability ◽  
Technical Condition ◽  
Masonry Walls ◽  
Similar Materials ◽  
Structure Strength ◽  
Computational Procedures ◽  
Periodic Inspections

The basis for diagnosis of technical buildings includes information collected by the measurement system and generated by suitable computational procedures. In the case of residential buildings, the parameter describing the symptoms of efficiency / inefficiency of components of a building is defined as the degree of wear, determined during periodic inspections. The degrees of wear of components of a building performed in the same technology. i.e. similar structure-strength systems, and with similar materials are the key figures in the prediction of the reliability of a building.The article presents the methodology of predicting operational reliability of masonry walls. The predictions of the degree of wear for walls, described with the Rayleigh distribution function, have been verified with the assessment of the technical condition of buildings in Zielona Góra.

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