Tag:hydraulic design

№9|2016

PIPELINE SYSTEMS

bbk 000000

UDC 628.144:532.542:691.175

Averkeyev I. A., Gimazieva D. R.

Analysis of methods of hydraulic calculation of pressure pipelines  made of polymer materials

Summary

The analysis of the most pressing for today methods of hydraulic calculations used in domestic design of pressure pipeline systems made of polymer materials was carried out. The methods of hydraulic calculation of pressure pipes were considered on the basis of: pipe friction number formula for hydraulically smooth pipes suggested by F. A. Shevelev; Kolbruk formula (widely used overseas); formula suggested by A. Ia. Dobromyslov. The analysis of the methods was carried out in relation to the applicability and validity of the results of the hydraulic calculations of pressure pipelines. The aim of the analysis was to assist the designer in choosing the most comfortable method of hydraulic calculations of pressure pipes made of polymer materials.

Key words

, , , ,

 

№11|2016

PIPELINE SYSTEMS

bbk 000000

UDC 532.542.9

Boldyrev Vladimir Vasil'evich

Hydraulic calculations of a water curtain as a pipeline with cocurrent flow

Summary

The need for water curtains arises at over load of any toxic and explosive liquids and gases; and with account for the continuous growth of overload amounts owing to the construction of new terminals it is necessary to design water curtains more and more often. The ana­lysis of hydraulic calculations of a water curtain in a distribution pipeline is presented. When calculating through nozzles the expediency of using the widely known flow rate coefficient instead of an unknown departmental coefficient is shown. At present formulas for calculating the total flow through the water curtain nozzles and head loss in a distribution pipeline are lacking. The method of calcula­ting such a pipeline (pipeline with concurrent flow) is known from the hydraulics. However, it cannot be used because it is suitable for the constant specific flow rate, and the specific flow rate of the water curtain is not constant. The task of making hydraulic calculations of a water curtain for a distribution pipeline has been formulated as follows: determining such pressure and flow rate values that provide for the set flow and pressure for the last (most remote) nozzle is required. When determining head losses in a distribution pipeline the flow rate value before the pipeline multiplied by the decreasing coefficient is used. It was stated that this coefficient depended on the ratio of the diameter of the distribution pipeline to the nozzle diameter. The diagram and formula describing the above-noted dependency are presented together with an example of the calculations illustrating the use of the obtained dependencies.

Key words

, , , , ,

 

№10|2019

FIREFIGHTING WATER SUPPLY

DOI 10.35776/MNP.2019.10.04
УДК 614.844

Yepifanov S. P., Zorkaltsev V. I., Baranchikova N. I., Korel’stein L. B.

Hydraulic calculation of automatic firefighting systems
combined with internal fire water pipeline system

Summary

In recent decades the construction of large buildings has risen sharply: shopping and entertainment centers, multifunctional high-rise buildings for residential and public purposes with underground parking lots, storage facilities for the storage of combustible materials. During construction finishing materials are often used that emit toxic substances if ignition occurs. Fires can result in fatalities and substantial material losses. For the fire safety of buildings and structures the use of firefighting water supply – both outdoor and internal is most effective. Due to the inability to provide for outdoor firefighting of a large part of the premises of the upper floors of high-rise buildings, the effectiveness and reliability of internal firefighting systems is of particular importance. Water consumption for fire water supply can be 200 l/s or more. To supply water in such a volume to the fire points, effective internal fire water supply systems are required: automatic firefighting systems (sprinkler and deluge), internal fire water pipelines, deluge water curtains. Combined internal firefighting systems include automatic firefighting installations and internal firefighting water pipeline. The method of hydraulic calculation of each of these systems is available in the regulatory and specialized literature. However, in the process of hydraulic calculations of combined (integrated) firefighting water supply systems, their essential features should be taken into account. In this regard, a mathematical model of flow distribution in automatic firefighting systems combined with an internal fire water pipeline system is considered. The technique of hydraulic calculation of arbitrary combined firefighting water supply systems is given. The proposed model allows you to get an actual value of water abstraction through nozzles (sprayers) and hand control branch pipes.

Key words

, , , , , , ,

 

№9|2018

WATER DISTRIBUTION NETWORKS

bbk 000000

UDC 628.14:004.415.53

Primin O. G., Gromov G. N., Stepanov D. L., Kozlova O. V.

Calibration of an electronic model of a water supply system
(through the example of the water distribution network of Salavat city)

Summary

In accordance with the RF legislation within the frames of the water supply schemes development for the Russian cities designing an electronic model of a water supply system is envisaged. In order to obtain trustworthy results of modeling the model verification is required that is carried out by the calibration on the basis of operation and statistic data of the water supply system. The action of the electronic model calibration through the example of the Salavat water distribution network is described (Republic of Bashkortostan). The calibration was aiming at maintaining hydraulic head at the nodal points of the design model according to the assumed calculation as well as maintaining water source flows according to the assumed estimation hour. The calibration of the electronic model of the water supply system was carried out by varying the maximum values of steel and cast iron pipeline roughness that corresponded to their maximum working lifespan. The calibration process involved a considerable amount of hydraulic calculations (256). The mean total difference of hydraulic head between the estimated values and actual measurements was 4.03%; the mean total difference of water source flows – 0.31%. With the purpose of the calibration process automation an algorithm based on VBA language with the use of Excel tables and ActiveX library of «ZuLuNetTools» was developed. The developed algorithm of automated calibration of the electronic model is applicable to «ZuLu» Russian software.

Key words

, , , , ,

 

№8|2019

ОЧИСТКА ПОВЕРХНОСТНОГО СТОКА

DOI 10.35776/MNP.2019.08.06

UDC 628.22

Vereshchagina L. M., Ten A. E., Gromov G. N., Khudiakova Dar’ia

Method of hydraulic calculation of the innovative designs
of surface runoff disposal

Summary

The method of hydraulic calculation of open canals of the surface runoff drainage system ACO Qmax is presented. The canals are designed to collect and drain surface (rain, snowmelt and street flush water) runoff from urban areas of various functional purposes: parking lots, warehouse complexes, shopping centers, transport terminals, highways, service area facilities, industrial areas with heavy traffic, marine and river terminals, airfields, sports facilities, local park and other areas where the use of open drainage systems is allowed. The method was developed by the experts of MosvodokanalNIIproject JSC taking into account the legislative, regulatory and procedural documents of the Russian Federation governing the design of systems for the removal and treatment of surface runoff from the territory of settlements. The method is based on the results of experimental studies on determining the hydraulic characteristics of canals of the ACO Qmax drainage system that are a sort of open systems and are widely used in the EU countries for land improvements.

Key words

, , , ,

Скачать/download (PDF) free access

 

№4|2013

ADVANCED TECHNOLOGIES AND EQUIPMENT

bbk 000000

UDC 696.117.001.24

Svintsov A. P., MUKARZEL S. A., Shchesnyak L. E.

The method of designing a tap head for water supply fittings

Summary

The method of hydraulic designing a tap head for water supply fittings with a flat locking couple with a passageway made in the form of a curved drop is presented. The developed design is characterized with a high regulating capacity that provides for changing the water flow proportional to the turn of the tap handle. With this wastage of water is decreased.

Key words

, , , , ,

 

№8|2013

WATER DISTRIBUTION NETWORKS

bbk 696.115.005

UDC

Zotova I. Yu., Zotov Yu. N., Strelkov A. K.

Methodic procedures of hydraulic designing plumbing systems in tenement buildings

Summary

Changes in the current water and wastewater regulatory legislation establishing unambiguous requirements to the development of methodic procedures are considered. The guidelines on creating methodic procedures that being implemented will ensure the legitimacy of the methods are given. It is shown that using utility facilities of the entire apartment as a primary element and introducing two new concepts, i. e. master service connection and maximum momentary flow, allowed developing advanced methods of determining design flows and required water head for the master service connection.

Key words

, , ,

 

№7|2010

PROBLEMS, PERSPECTIVES

bbk 000000

UDC 628.22:532.542

Chupin V. R., Melekhov E. S., Chupin R. V.

Pressure Movement of Flows in Gravity Manifolds

Summary

A new approach to the design of water disposal systems based on their simulation with hydraulic chains with unrecorded withdrawals and inflows of runoffs is offered. It makes it possible, on one hand, to determine the presence of counterflows in the network, possible effusions of flows on the ground surface, volumes of runoffs running out, carrying capacity of a water disposal system and, on the other hand, to simulate various conditions of flow transportation with due regard for possible cloggings, encrustation of pipes and other violations which can occur during the operation.

Key words

, , , , , ,

 

№12|2015

WATER DISTRIBUTION NETWORKS

bbk 000000

UDC 628.1

GALPERIN E. M.

On hydraulic calculations of a loop water distribution network
(to be discussed)

Summary

During the operation a loop water distribution network is subject to both disturbing impact and control activities. Disturbing impact aims at changing the state of the network. At that the operating personnel try to maintain the network in 100% working conditions at minimum costs by the control activities. Disturbing impact is caused by water consumption alterations and pipeline failures that arise stochastically. In the process of hydraulic designing water consumption variations are simulated with so called specific modes chosen at the most crucial moments of the water network operation. Hydraulic calculations of the specific modes are carried out provided the network is in complete function. The model of a loop water distribution network operation does not take into account the disturbing impact of failures. The construction rules and regulations determine only the level of the network operation in case of a single section cutoff. For simulating the process of failure occurrence and elimination the use of the mathematical tools of a queue system is suggested. The calculations show that at the existing water network failure rate and repair time the loop water distribution network is in non-operating condition at least for three and more weeks over a year. The procedure of hydraulic calculation of a loop water distribution network with account of occurring failures and repair time is suggested.

Key words

, , , , ,

 

№3|2020

LAWS, STANDARDS, REGULATIONS

DOI 10.35776/MNP.2020.03.05
UDC 696.11

Strelkov A. K., Zotov Yu. N., Mikhailova I. I.

On improving Code of Rules (CR) 30.13330.2016 «Water supply and drains of buildings. Revised edition of SNiP 2.04.01-85*» (for the discussion)

Summary

The article is explaining the amendments to Code of Rules (CR) 30.13330.2016 «Water supply and drains of buildings. Revised edition of SNiP 2.04.01-85*». The results of the analysis of the interconnections of the system of technical regulation in construction business and the system of regulating the provision of public services are presented. In order to create a legitimate methodological toolkit, the experts of the Academy of Civil Engineering and Architecture, Samara State Technical University developed amendments to CR 30.13330.2016 that will clarify the content of the regulatory document and specify certain elements of the design and calculation of the internal water supply systems of an apartment building. The methodology of designing drinking water supply systems for apartment buildings is considered. Methodological procedures and their practical implementation in the design of internal drinking water supply systems of an apartment building are given.

Key words

, , ,

 

№12|2019

PIPELINE SYSTEMS

DOI 10.35776/MNP.2019.12.05

UDC 628.144:532.542

Averkeyev I. A.

On special features of determining the coefficient
of equivalent polymer pipe roughness
(to be discussed)

Summary

The criteria of estimating the condition of the inner surface of water and wastewater pipelines are considered and appraised. In particular, the feasibility of using equivalent roughness Кэ coefficient as such a criterion is substantiated. Two main methods of determining Кэ parameter are presented and described: with the help of hydraulic experiments with subsequent processing of the results by Prandtl and Colebrook–White equations; direct measurement by a proficorder of the arithmetic mean deviation of the profile of the inner surface of the pipe from the midline Ra with the subsequent conversion to Кэ using the empirical dependence obtained by A. Ia. Dobromyslov. An assessment of the reliability of the results obtained by these methods is given. The feasibility of developing a standard regulating the procedure of determining the parameter Кэ and the mandatory in-process monitoring of it are considered.

Key words

, , ,

 

№11|2017

DESIGNING WATER AND WASTEWATER SYSTEMS

 

bbk 000000

UDC 65.012.45:628.1/.2

Chupin V. R., Chupin R. V., Alekseev A. V., Novitskii N. N.

Prospective development scheme of the water supply
and wastewater disposal systems in the city of Irkutsk
and Irkutsk Area

Summary

According to the national legislation all the communities in Russia shall have prospective development schemes of the water supply and wastewater disposal systems. In the process of developing the schemes the electronic models and software for the assessment of the options of the development and decision making related to their implementation shall be used. Using the example of developing the scheme of the water supply and wastewater disposal systems in the city of Irkutsk and Irkutsk Area the efficiency of using «ANGARA» information computer complex that have been used for several years in the operating activities of Irkutsk «Vodokanal» MUE is shown. The main tool used in the scheme development was the electronic model of the pipeline system – the data base and software complex. The data bases contain the information on the site plans, schemes and parameters of the network elements and structures required for hydraulic calculations. The use of this complex provided for developing within fairly short time a radically new scheme of the water supply and wastewater disposal systems of the city of Irkutsk and Irkutsk Area for the period until 2025. The scheme provides for connecting 28 communities of the Irkutsk Area to the public water supply and wastewater disposal systems of Irkutsk.

Key words

, , , ,

 

№2|2011

WATER SUPPLY

bbk 000000

UDC 628.142.001.24

Belyaev N. N., Sukacheva I. N., Radetsky M. Yu.

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

, , ,

 
Toggle Text

№4|2018

WATER DISTRIBUTION NETWORKS

bbk 000000

UDC 628.144

Luk'ianchuk M. Iu., Hyamyalyainen M. M., Smirnova S. V., JUDIN M. Iu.

Hydraulic model use-case in the operation of a water and wastewater services utility

Summary

Hydraulic models are used at the water and wastewater services utilities for addressing different tasks related to improving the operation of water distribution networks. Practitioners have been continuously looking for possible ways of using the models for daily needs of the utilities and their technical execution with the use of software. The advanced software includes an adequate number of functions that ensure completing routine tasks of water distribution network operation, management and development. An example of modeling a fault pipeline section shutoff with sequential valve shifting is presented; a method of basic data generation and presentation of the modeling results is shown. In the viewed example during the routine work execution the hydraulic head is slightly changed. During the pipeline section cutoff pressure monitoring in the control points of the pressure zone and additionally in the sections where pressure reduction is expected based on the results of modeling is carried out. In appropriate cases pressure reduction in the network can be balanced by increasing the output pressure of the pumping station. Changing flow directions will influence to a small extent separate network sections that could be additionally flushed before the cutoff. Following the pipeline cutoff procedure together with the recommendations based on the results of hydraulic modeling provides for eliminating the disruption of water supply to the customers.

Key words

, , , ,

 

№10|2016

WATER DISTRIBUTION NETWORKS

bbk 000000

UDC 628.32:62-192

GALPERIN E. M., Egorova Yu. A., Vas'kovskii A. V., Konevskii E. V.

Ways to improve the municipal water supply and distribution system

Summary

Simulation of all possible switch-overs in the municipal water distribution network caused by fault section cutoffs is practically unfeasible because of the large number of simulation cases. For the implementation a method of the distribution network dividing into separate districts (zones) with water flow rate measured at the input and outlet is suggested in a similar way to the elimination of leaks. Within the limits of each district including up to 50 km pipelines the search of the isolated sections becomes feasible. At that determi­ning the reliability of the water supply in each district as a part of the annual period when the customer receives water on a regular basis is possible. This is achieved with the use of Markov model for determining the period of the water distribution network being operational and in the state with simultaneously isolated sections. Then by hydraulic calculations the parameters of the network in non-operating conditions are determined; at that it is determined which parameters are related to the operation period with normal or lowered level of performance.

Key words

, , , , ,

 

№4|2016

PIPELINE SYSTEMS

bbk 000000

UDC 628(14+21):66.011

Primin O. G., Gromov G. N.

Designing an electronic model of water supply and wastewater disposal systems and model implementation by the example of a Russian city

Summary

Basing on the requirements set by the Russian legislation the development of the water industry and municipal utilities infrastructure shall be implemented in accordance with water supply and wastewater disposal plans. In case the city population exceeds 150 thousand inhabitants these plans shall include electronic models of water supply and wastewater disposal systems. The practical experience of «MosvodokanalNIIproject» JSC in the field of designing water supply and wastewater disposal plans for Russian cities shows that designing a proper electronic model requires significant scope of information including topological data for all the existing pipelines, geodesic marks of the pipelines, water consumer and pump characteristics, etc. Full data acquisition and displaying in electronic format can take a lot of time. In case the operator of the water and wastewater systems does not have a detailed electronic model at the first stage usually a decision is made within the frames of water supply and wastewater disposal systems engineering to design an enlarged version that will provide for estimating and analyzing the operation of water mains, main pumping stations and regulation facilities. Further on, based on the model analysis and approbation and on the city Masterplan and urban infrastructure the prospective models are developed. The experts of «MosvodokanalNIIproject» JSC successfully designed electronic models of water supply and wastewater disposal systems of Ufa, Irkutsk, Penza, and Orenburg. The experience of designing an electronic model of water supply and wastewater disposal systems by the example of a Russian city is presented.

Key words

, , , ,

 

№8|2014

DRINKING WATER SUPPLY

bbk 000000

UDC 696.115

Strelkov A. K., Zotov Yu. N., Mikhailova I. I.

Calculation of hydraulic operation mode of in-door plumbing systems in tenement houses

Summary

The results of analytical investigation of selecting the characteristics and equipment for the in-door plumbing systems with the purpose of providing for the safe living conditions in tenement houses are presented. The algorithm of hydraulic calculations with account of the regulatory requirements to the advanced energy efficient domestic water supply and characteristics of the modern equipment is described. The necessity of making hydraulic calculations at the maximum and minimum water flow is shown. The mechanism of selecting optimal solutions for determining hydraulic characte­ristics of plumbing systems is considered. The recommendations for developing methodical procedures the fulfillment of which will ensure the legitimacy of the methods of making hydraulic calculations of the in-door plumbing systems in tenement houses are given. The main requirement to determining the pipe diameter in automated water supply systems is ensuring the compliance of the controlled medium parameters to the technical characteristics of the control valve to provide for the proper operation. The traditional method of selecting a pressure reducing valve provides for an approximate result because some basic data used in calculations is undefined until the hydraulic design is completed. Therefore, the implementation of this method involves design and check hydraulic calculations. Selecting a pressure reducing valve is significantly simplified when using the method developed in the Samara State University of Architecture and Civil Engineering. In contrast to the traditional in the method developed in Samara State University of Architecture and Civil Engineering all the basic data can be uniquely determined before making hydraulic calculations.

Key words

, , , ,

 

№6|2017

WATER DISTRIBUTION NETWORK RELIABILITY

bbk 000000

UDC 628.152

GALPERIN E. M., Bukhman N. S.

Calculation of loop network reliability

Summary

The reliability of loop water distribution network operation has been its primary property. However, until now the regulatory documents for designing water distribution networks lack the reliability indices. There is no consensus among the experts related to these indices. Earlier proposed set of reliability indices of a loop water network is considered and one of the possible methods of their calculation is suggested. The data on the time of the water mains 325.78 km long operating in serviceable and unserviceable conditions is set by the example of the Samara municipal water network (the data for 2014). For the theoretical determination of the time of the water mains being in serviceable and unserviceable conditions Markovian model was used with discrete states and continuous time. To decrease the dimensionality of the current task all the states with equal number of isolated sections were curtailed into one state (subset). The feasibility of this solution was prompted by the practice of water network operation. The model verification by Pearson’s Chi-square criterion allows accepting the hypothesis of the theoretical results corresponding to the available experimental data.

Key words

, , , ,

 

№7|2019

WATER DISTRIBUTION NETWORKS

bbk 000000

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

, , , , , , , , ,

 

№5|2016

PIPELINE SYSTEMS

bbk 000000

UDC 628.144:532.542

Prodous O. A., Terekhov L. D.

Comparative evaluation of using charts by different authors  for hydraulic calculation of pressure polyethylene pipelines

Summary

The results of hydraulic calculations carried out with the use of charts compiled by different authors are compared. The example of hydraulic calculations of a pipeline with a diameter of 160 mm for certain flow rate and pressure as well as the analysis of the hydraulic characteristics obtained from the charts by different authors for hydraulic calculations of pressure polyethylene pipes with practical conclusions are presented. The demand for such a comparison is driven by the inquiries from engineering companies busy with designing pressure polyethylene pipelines and experiencing difficulties with choosing the right charts for precise hydraulic calculations; and by the significant errors in the process of determining specific head losses along the length – hydraulic resistance that ultimately influences energy consumption of pumps during water transportation.

Key words

, , , ,

 
<< Start < Prev 1 2 Next > End >>
Page 1 of 2

vstmag engfree 200x100 2

mvkniipr ru

Российская ассоциация водоснабжения и водоотведения

Конференция итог

ecw20 200 300

VAK2