Hydraulic characteristics and calculation of the innovative systems of surface runoff disposal

2021 ◽  
pp. 46-51
Author(s):  
Ю.В. Брянская ◽  
А.Э. Тен ◽  
Н.Т. Джумагулова ◽  
Г.Н. Громов
Keyword(s):  
Cross Sections ◽  
Surface Runoff ◽  
Experimental Studies ◽  
Drainage System ◽  
Anthropogenic Pollution ◽  
Hydraulic Characteristics ◽  
Regulatory Requirements ◽  
The Subject ◽  
Intensive Development ◽  
Selection Of

В условиях интенсивного развития новых отечественных и зарубежных технологий, материалов и оборудования, применяемых для защиты окружающей природной среды от загрязнений техногенного происхождения, особую актуальность приобретают разработки новых систем отвода и очистки поверхностных сточных вод. Эти системы позволяют использовать последние достижения отраслевой науки и оптимизировать алгоритм выполнения операций и практических приемов их гидравлического расчета. Примером является инновационная система отвода поверхностных сточных вод АСО Qmax, которая относится к открытой системе каналов (лотков) для сбора и отведения поверхностных сточных вод, формирующихся при выпадении атмосферных осадков. Однако широкому применению данного вида конструкций в России препятствует отсутствие методики их гидравлического расчета, в том числе таблиц для подбора сечений (диаметров) каналов, которая бы удовлетворяла требованиям российской нормативно-методической базы проектирования систем отведения поверхностных сточных вод. В этой связи предметом данной статьи явилась оценка гидравлических характеристик трубопроводов, каналов (лотков) системы водоотвода АСО Qmax. Приведены результаты теоретических и экспериментальных исследований гидравлических характеристик системы АСО Qmaxс учетом адаптации для российских условий и нормативных требований, а также обоснование рекомендуемых параметров для их использования. In the context of the intensive development of new domestic and foreign technologies, materials and equipment used to protect the environment from anthropogenic pollution, the development of advanced systems for surface runoff removal and treatment is of special actuality. These systems provide for using the latest achievements of the sectoral science and optimizing the algorithm for performing operations and practical methods for the hydraulic calculations. An example of the innovative surface runoff disposal system is ASO Qmax, that refers to an open system of channels for the collection and disposal of surface runoff formed during precipitation. However, the widespread use of these facilities in Russia is hampered by the lack of a method for the hydraulic calculations, including tables for the selection of cross-sections (diameters) of channels that meet the requirements of the Russian guidelines and regulations for the design of surface runoff disposal systems. In this regard, the subject of this paper is the estimation of the hydraulic characteristics of pipelines, channels of ASO Qmax drainage system. The results of theoretical and experimental studies of the hydraulic characteristics of ASO Qmax system with account of the adaptation for the Russian conditions and regulatory requirements, as well as the justification of the recommended parameters for their use are presented.

scholarly journals Study of Energy Consumption of a Bucket Conveyor in a Jig Concentrator Plant in a Hard Coal Mine

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5706
Author(s):  
Sebastian Jendrysik ◽  
Sławomir Bartoszek ◽  
Dominik Bałaga ◽  
Gabriel Kost ◽  
Agnieszka Sękala
Keyword(s):  
Energy Consumption ◽  
Predictive Control ◽  
Coal Mine ◽  
Experimental Studies ◽  
Electricity Consumption ◽  
Movement Speed ◽  
Hard Coal ◽  
Predictive Algorithm ◽  
The Subject ◽  
Selection Of

The subject of the discussion is oriented toward limiting the energy consumption of the bucket conveyor used in jig concentrator plants by controlling its speed. A method of predictive control of the bucket conveyor speed is presented. It allows for reducing the energy consumption due to appropriate selection of bucket movement speed to ensure the nominal filling of buckets along the entire length of the conveyor. This approach enables limiting the idling speed of the conveyor, extend its life, and also reduce the electricity consumption of the entire system. Experimental studies, carried out at the “Sośnica” Coal Mine working facility, confirmed that the use of a predictive algorithm for controlling the bucket conveyor speed and adapting the bucket speed to the current load decreased in energy consumption n by 9.6%, with 80% of the filling conveyor.

scholarly journals Results of hydraulic tests of the ACO Qmax system pipeline

2021 ◽  
Vol 264 ◽  
pp. 03073
Author(s):  
Yuliya Bryanskaya ◽  
Aleksandra Ostyakova
Keyword(s):  
Water Flow ◽  
Surface Runoff ◽  
Experimental Studies ◽  
Drainage System ◽  
Resistance Coefficient ◽  
Computational Method ◽  
Hydraulic Calculation ◽  
Roughness Coefficient ◽  
Calculation Methods ◽  
Residential Areas

Polymer corrugated pipelines are a very promising type of construction that has many advantages over concrete and reinforced concrete structures that are widely used today for collecting and diverting surface runoff from residential areas and enterprise sites. To collect and divert surface runoff from residential areas and enterprise sites, the hydraulic characteristics of the drainage system made of corrugated polymer culverts of ACO Qmax are studied by computational and experimental methods. The experiments were carried out in the laboratory of Hydraulics and hydro-mechanics at different flow rates and different slopes. The kinematic and dynamic characteristics of the water flow in the pipeline were determined: the velocity, the roughness coefficient, and the hydraulic resistance coefficient were measured at different values of the pipeline filling. It is found that the characteristics of the water flow obtained by the computational method using a computer program differ from the experimental values, the reason for which, apparently, in the shortcomings of the computational program and the lack of accuracy of experimental measurements. Experimental studies were conducted to adjust the calculation methods of such pipelines used in the design and verification of hydraulic calculation methods of corrugated pipelines based on the software product ACO Qmax.

Modern Regulatory Requirements for Gas Fire Extinguishing to Improve the Safety of Facilities

2020 ◽  
pp. 55-60
Author(s):  
N.V. Smirnov ◽  
◽  
A.V. Kazakov ◽  
D.V. Bukhtoyarov ◽  
◽  
...  
Keyword(s):  
Experimental Studies ◽  
Combustion Time ◽  
Regulatory Requirements ◽  
Fire Extinguishing ◽  
Eurasian Economic Union ◽  
Flammable Liquids ◽  
Fire Experiment ◽  
Economic Union ◽  
Selection Of

To implement the technical regulations of the Eurasian Economic Union «On the requirements for fire safety and fire extinguishing equipment» (TR EAEU 043/2017), modern regulatory requirements were developed based on the advanced domestic and foreign research in order to increase the efficiency of using automatic gas fire extinguishing installations. The domestic methodology of experimental determination of the gas extinguishing concentration in the fire chamber has a number of advantages in comparison with the foreign analogues. It is established that it is necessary to take into account the conditions of fire experience for the selection of equipment for a fire extinguishing installation with FK-5-1-12 in the process of its design, in order to ensure more complete evaporation of the liquid phase of FK-5-1-12 after leaving the nozzles. An assumption was substantiated that allows setting the normative concentration of fire extinguishing gases at the level of heptane without conducting a fire experiment to extinguish fires of flammable liquids with a flash point of more than 61 оC. In this case, the concentration value can be taken 15 % less than according to the requirements of ISO 12854: 2009. Experimental studies on extinguishing smoldering materials with gases were conducted. It was established that nitrogen, CO2, freons 114B2 and 227ea at a concentration for extinguishing heptane eliminate not only flame combustion, but also smoldering if the free combustion time does not exceed 3 min. With free combustion for more than 6 minutes, reliable suppression of smoldering is achieved when the oxygen content in the volume of the fire chamber is up to 2.5 % vol. The results of the experiments were taken into account in the draft norms for the design of fire extinguishing installations. Additional requirements were developed for gas fire extinguishing containers and selector valves, which will make it possible to exclude the use of low-quality or obsolete products as part of gas fire extinguishing installations in the territory of the Eurasian Economic Union. The developed modern requirements are included in the drafts of new regulatory documents, which were publicly discussed, and are at the approval stage.

Методика гидравлического расчета инновационных конструкций системы отвода поверхностных сточных вод

2019 ◽  
pp. 56-61
Author(s):  
L. Vereshchagina ◽  
A. Ten ◽  
G. Gromov ◽  
D. Khudiakova
Keyword(s):  
Surface Runoff ◽  
Urban Areas ◽  
Open Systems ◽  
Heavy Traffic ◽  
Experimental Studies ◽  
Drainage System ◽  
Hydraulic Calculation ◽  
Water Runoff ◽  
Open Drainage ◽  
The Eu

Представлена методика гидравлического расчета открытых каналов (лотков) системы водоотвода АСО Qmax. Каналы предназначены для сбора и отведения поверхностных (дождевых, талых и поливомоечных) сточных вод с городских территорий различного функционального назначения: паркингов, складских комплексов, торговых центров, транспортных терминалов, автомагистралей, объектов дорожного сервиса, промышленных зон с интенсивным движением грузового автотранспорта, морских и речных причалов, аэродромов, спортивных объектов, внутриквартальных, парковых и других территорий, где допускается использование открытых систем водостока. Методика разработана специалистами АО МосводоканалНИИпроект с учетом законодательства и нормативнометодических документов Российской Федерации, регламентирующих проектирование систем отведения и очистки поверхностных сточных вод с территории поселений. В основе методики результаты экспериментальных исследований по определению гидравлических характеристик каналов системы водоотвода АСО Qmax, которые являются разновидностью открытых лотковых систем и широко используются в странах ЕС для благоустройства территорий.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.

scholarly journals Regional Policy Financial Instruments in the Szczecin Metropolitan Area

e-Finanse ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. 66-72
Author(s):  
Elżbieta Ociepa-Kicińska
Keyword(s):  
Metropolitan Area ◽  
Regional Policy ◽  
Business Environment ◽  
Financial Instruments ◽  
Rate Of Development ◽  
Academic Literature ◽  
The Subject ◽  
Intensive Development ◽  
Selection Of ◽  
Stimulation Of

Abstract The progressing “metropolisation” of the economy is connected with the intensive development of some cities considered to be metropolises or potential metropolises. One of the prerequisites needed to achieve a good rate of development is providing support to enterprises in the form of financial instruments constructed in such a way that their implementation will contribute to stimulation of the economy within a given area. The aim of this paper is to review and systematise the concept of regional policy financial instruments operating in the Szczecin Metropolitan Area (SMA). In the academic literature on the subject, the concept is rarely addressed, and it accounts for only some areas of financing or focuses on selected sources of finance. On that basis, an analysis was made along with a selection of regional policy financial instruments that are in place in the SMA. The specific entities functioning within the business environment institutions in the SMA are discussed along with the kinds of financial instruments offered by them.The analysis resulted in identifying 11 institutions whose range of operations include offering regional policy financial instruments to entrepreneurs.

3-D reconstruction and analysis of mammalian mitotic spindle structure

1992 ◽  
Vol 50 (1) ◽  
pp. 578-579
Author(s):  
Kent McDonald ◽  
David Mastronarde ◽  
Rubai Ding ◽  
Eileen O'Toole ◽  
J. Richard McIntosh
Keyword(s):  
Cross Sections ◽  
Mitotic Spindle ◽  
Experimental Studies ◽  
Video Camera ◽  
Three Dimensions ◽  
Mitotic Spindles ◽  
Black And White ◽  
Reconstruction Methods ◽  
Spindle Structure ◽  
Tissue Culture Line

Mammalian spindles are generally large and may contain over a thousand microtubules (MTs). For this reason they are difficult to reconstruct in three dimensions and many researchers have chosen to study the smaller and simpler spindles of lower eukaryotes. Nevertheless, the mammalian spindle is used for many experimental studies and it would be useful to know its detailed structure.We have been using serial cross sections and computer reconstruction methods to analyze MT distributions in mitotic spindles of PtK cells, a mammalian tissue culture line. Images from EM negatives are digtized on a light box by a Dage MTI video camera containing a black and white Saticon tube. The signal is digitized by a Parallax 1280 graphics device in a MicroVax III computer. Microtubules are digitized at a magnification such that each is 10-12 pixels in diameter.

Experimental Studies Of Multilayer Glass Structures On Compression, Compression With Bending And Simple Bending

2019 ◽  
pp. 22-30
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Applied Load ◽  
Experimental Studies ◽  
Strength Properties ◽  
Research Topic ◽  
Normative Values ◽  
Laminated Glass ◽  
The Cross ◽  
Experimental Values

The work of multilayer glass structures for central and eccentric compression and bending are considered. The substantiation of the chosen research topic is made. The description and features of laminated glass for the structures investigated, their characteristics are presented. The analysis of the results obtained when testing for compression, compression with bending, simple bending of models of columns, beams, samples of laminated glass was made. Overview of the types and nature of destruction of the models are presented, diagrams of material operation are constructed, average values of the resistance of the cross-sections of samples are obtained, the table of destructive loads is generated. The need for development of a set of rules and guidelines for the design of glass structures, including laminated glass, for bearing elements, as well as standards for testing, rules for assessing the strength, stiffness, crack resistance and methods for determining the strength of control samples is emphasized. It is established that the strength properties of glass depend on the type of applied load and vary widely, and significantly lower than the corresponding normative values of the strength of heat-strengthened glass. The effect of the connecting polymeric material and manufacturing technology of laminated glass on the strength of the structure is also shown. The experimental values of the elastic modulus are different in different directions of the cross section and in the direction perpendicular to the glass layers are two times less than along the glass layers.

Thomas More’s Correspondence in a Spanish Ambiance

Moreana ◽  
2002 ◽  
Vol 39 (Number 149) (1) ◽  
pp. 41-60 ◽  
Author(s):  
Eugenio M. Olivares Merino
Keyword(s):  
The Subject ◽  
Selection Of

The recent reprinting of Álvaro de Silva’s 1998 edition of a selection of More’s letters prompts the author to examine the subject of Spanish translations of More, and of de Silva’s general commentary on More’s correspondence and on his relationship to other humanists. The author reflects on aspects of More’s personality as exposed in his letters and uses what he finds as a corrective to several biographical misconceptions. He points out the strengths and weaknesses of de Silva’s work and compares it with that of other translators, particularly Elizabeth Rogers, and notes the particularly Spanish quality of de Silva’s edition.

Tanks in the Spa Town. The New Book about the Events of the Year 1968 in Czechoslovakia

2019 ◽  
Vol 14 (1-2) ◽  
pp. 278-282
Author(s):  
Kirill A. Popov
Keyword(s):  
Fiftieth Anniversary ◽  
Warsaw Pact ◽  
Scientific Event ◽  
The Social ◽  
Prague Spring ◽  
The Subject ◽  
Scientific Terms ◽  
Selection Of ◽  
Regional Perspective ◽  
The Way

This review is devoted to the monograph by Jan Nedvěd “We do not decline our heads. The events of the year 1968 in Karlovy Vary”. The Karlovy Vary municipal museum coincided its publishing with the fiftieth anniversary of the Prague spring which, considering the way of the presentation, turned the book not only to scientific event but also to the social one. The book describes sociopolitical trends in the region before the year 1968, the development of the reformist movement, the invasion and advance of the armies of the Warsaw Pact countries, and finally the decline of the reformist mood and the beginning of the normalization. Working on his writing, the author deeply studied the materials of the local archive and gathered the unique selection of the photographs depicting the passage of the soviet army through the spa town and the protest actions of its inhabitants. In the meantime, Nedvěd takes undue freedom with scientific terms, and his selection of historiography raises questions. The author bases his research on the Czech papers and scarcely uses the books of Russian origin. He also did not study the subject of the participating of the GDR’s army in the operation Danube, although these troops were concentrated on the borders of Karlovy Vary region as well. Because of this decision, there are no materials from German archives or historiography in the monograph. In general, the work lacks the width of studying its subject, but it definitively accomplishes the task of depicting the Prague spring from the regional perspective.

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