Method of computer-aided profiling of components of flow passages of centrifugal pumps for fuel and energy complex

2020 ◽  
Vol 12 (4) ◽  
pp. 260-267
Author(s):  
A. A. Vikhlyantsev ◽  
A. V. Volkov ◽  
Yu. V. Yavorovsky ◽  
A. A. Druzhinin
Keyword(s):  
Nuclear Power ◽  
Oil Refining ◽  
Thermal Engineering ◽  
Centrifugal Pumps ◽  
Flow Passage ◽  
Energy Complex ◽  
Russian Economy ◽  
Production And Distribution ◽  
Technical Solutions ◽  
The Given

Today, the fuel and energy complex (FEC) is the basis of Russian economy. It includes the most dynamically developing industries, such as petrochemical, oil refining, etc., associated with the production, transportation and processing of various fuels, as well as industries engaged in the production and distribution of electricity: thermal engineering, hydropower engineering and nuclear power engineering. The nomenclature of FEC centrifugal pumps includes a wide list of names: singleand multistage centrifugal pumps of low, medium and high pressure for clean water, water with impurities and various aggressive media [1, 2], pumps for oil production and transportation (trunk, booster, electric centrifugal production pumps, pumps for pumping leaks, etc.) and special pumps used in oil refining (cracking, cantilever chemical, etc.) [3]. The development of technical solutions aimed at improving energy efficiency as well as reliability and durability is one of the trends in the development of centrifugal pumps FEC that are most widely covered in engineering literature [4.9]. Along with this, reducing the complexity and cost of production of these pumps due to the automation of the design process remain just as important. In the given article, questions of development of a method of automated profiling of components of flow passage of centrifugal pumps for needs of FEC are considered. The description of the proposed method and the results of its approbation on the example of profiling of the flow passage of the impeller of the centrifugal cantilever chemical pump AH 12.5/50 are presented. Comparison with other known methods is carried out. The estimation of time costs for design works is carried out. It has been found that the automated profiling of the flow passage of the impeller according to the presented method took 720 times less time than manual profiling using conventional methods.

Improvement of the System of Statistical Indicators of the State and Development of the Fuel and Energy Complex of the Russian Federation

2019 ◽  
Vol 26 (12) ◽  
pp. 27-38
Author(s):  
M. R. Еfimova ◽  
N. A. Korolkova
Keyword(s):  
Oil Production ◽  
The State ◽  
Production Costs ◽  
Energy Resources ◽  
Oil Refining ◽  
Steady Increase ◽  
Development Trends ◽  
Energy Complex ◽  
Statistical Indicators

The article proposes an improved system of statistical indicators for assessing the state and development of the fuel and energy complex of Russia, which defines a methodological approach to identifying factors and trends in its development. The introduction highlights the relevance of modernization of information and methodological support for reaching decisions on new tasks, including those related to the digitalization of the economy and implementation of the national projects’ portfolio. The body of the article critically examines the current configuration of official and departmental statistical information, based on which the authors selected 85 key indicators reflecting the state and development level of the fuel and energy complex of Russia. All of them can be delineated by sectors and analysis tasks. This evaluation system includes 7 blocks: general block characterizing the role of the fuel and energy complex in the economic system; key industry performance indicators; indicators of the production structure by industry; technological indicators of industries; prices for fuel and energy resources; production costs by industry; distribution indicators of fuel and energy resources. The paper analyses development trends in the fuel and energy sectors for 2008-2018. In particular, the authors’ research showed that modern oil production is characterized by a change in the territorial structure, as well as the reinstatement of the role of vertically integrated companies in the development of oil production. The article presents findings on the technological upgrading of Russian oil refining. However, the authors’ research proved that oil refining depth has ceased to be a reliable indicator of the level of technological equipment and modernization level of oil refineries. With regard to the development of the gas industry, there has been a steady increase in gas production, which is supported by maintaining a steady increase in demand for Russian gas in the domestic and foreign markets. The all-time high domestic consumer demand for gas fuel, associated with the Russian Regions Gasification Program implemented by the Ministry of Energy of Russia, was recorded. At the same time, the authors identified the main risk factors in the development of the industry related to Gazprom (a backbone of the energy sector) activities. The persistent positive growth dynamics in commodity production of associated petroleum gas was established. It was also noted that the highest percentage of its beneficial use is characteristic of operators of production sharing agreements. As for the results of the analysis of the coal industry, a matter of interest is the growth of domestic prices for coal products and related derivative trends. Particular attention is paid to the development of the possibilities of using over-the-counter coal price indicators. Replacement of coal with natural gas at a thermal power station in most regions of the country is of interest within the identified development trends of the electric power industry in Russia, which is explained by the environmental friendliness of electricity generation.

scholarly journals Automatic Monitoring System Designed for Controlling the Stability of Underground Excavation

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Piotr MAŁKOWSKI ◽  
Zbigniew NIEDBALSKI ◽  
Łukasz BEDNAREK
Keyword(s):  
Rock Mass ◽  
Underground Mining ◽  
Automatic Monitoring ◽  
Mass Movements ◽  
Support Design ◽  
Automatic Monitoring System ◽  
Underground Workings ◽  
The Stability ◽  
Technical Solutions ◽  
The Given

Ensuring the stability of mining excavations is a crucial aspect of underground mining. For thispurpose, appropriate shapes, dimensions, and support of workings are designed for the given mining andgeological conditions. However, for the proper assessment of the adequacy of the used technical solutions,and the calibration of the models used in the support design, it is necessary to monitor the behavior of theexcavation. It should apply to the rock mass and the support. The paper presents the automatic systemdesigned for underground workings monitoring, and the example of its use in the heading. Electronicdevices that measure the rock mass movements in the roof, the load on the standing support, and on bolts,the stress in the rock mass, are connected to the datalogger and can collect data for a long of time withoutany maintenance, also in hard-to-reach places. This feature enables the system to be widely used, inparticular, in excavations in the vicinity of exploitation, goafs, or in the area of a liquidated exploitationfield.

Centrifugal Pump Leak-Free Technology Introduction and Its Applications in EPR Nuclear Power Plant

2010 ◽  
Author(s):  
Guohui Cong ◽  
Ling Zhang
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Centrifugal Pump ◽  
Nuclear Power ◽  
Operating Conditions ◽  
Critical Conditions ◽  
Mechanical Seal ◽  
Centrifugal Pumps ◽  
Canned Motor ◽  
Magnetic Drive

Environmental protection requirement is more and more critical now, and it increases the request to prevent dangerous liquid to leak outside in nuclear power plant too. Centrifugal pumps are the most important active equipments in nuclear power plant, but there is a shaft clearance between rotor and stator of centrifugal pump. The shaft clearance can lead pumped fluid to the outside, so the environment may be polluted by the leakage. In some critical conditions such as transferring high radioactive fluid in the pump, the leakage shall be totally forbidden. So solutions have to be found to make centrifugal pumps totally leak-free for applications in nuclear power plant. Normally there are three leak-free technologies for centrifugal pumps: mechanical seal with auxiliary system, canned motor and magnetic drive. In this paper, all the three leak-free technologies and some of their applications in EPR 3rd generation PWR nuclear power plants are presented and discussed. The results show that in EPR nuclear power plant, canned motor pumps can be preferably used for strict environmental requirement of leak-free if the pump power and operating conditions are applicable. For other conditions, pumps with double mechanical seal can also be used with additional sealing water system support. For centrifugal pumps with magnetic drive are not so applicable in high pressure condition, and the safety aspect is weaker than canned motor pumps, generally they are not used in EPR nuclear power plant at present.

Mechanical Seal Efficiency Considerations for Pumps in Utilities: Economics of Seals vs. Packing, and Savings With Best Available Seal Flush Arrangements

2008 ◽  
Author(s):  
Richard Smith ◽  
Alan Roddis ◽  
Heinz P. Bloch
Keyword(s):  
Case Studies ◽  
Best Practice ◽  
Energy Savings ◽  
Cooling Water ◽  
Oil Refining ◽  
Feed Water ◽  
Mechanical Seal ◽  
Centrifugal Pumps ◽  
Power Generators ◽  
Water Pumps

Applicable industrial standards for centrifugal pumps endorse several different sealing options as “best practice.” However, the overall acceptance of best practice techniques seems slow and is linked to the fact that sealing devices account for only a small fraction of the energy consumed by pumps. Yet, regardless of perception, significant energy conservation has been achieved by thoughtful sealing practices, as this paper will show. It will highlight case studies that provide guidance on issues of increasing technical and societal concerns relating to fluid emissions. Special attention will be directed to barrier fluid circulation devices used in dual mechanical seal arrangements as described by API-682 (Ref.1), a Standard widely used in the oil refining and petrochemical industries. The applicability of these ciculation devices to the Power Industry will be explained. Comparisons of three of the most widely used conventional integral flow induction/pumping ring devices will be made and the results of extensive testing presented. The paper and presentation also quantifies the value of advanced sealing technologies for pumps and highlights configurational differences between the newer and the more traditional (older) devices. Without exception, international utilities and power producers know that both energy and maintenance expenditures are affected by availability and reliability considerations relating to power generators and their turbine drivers. But feed water pumps and cooling water issues play their part as well. Consequently, a measure of attention has been given to “other big ticket items”, such as cooling tower losses and the like. However, there is compelling evidence that additional, less prominent or less obvious opportunities exist and that these can no longer be overlooked. Pump sealing falls into that category, although sealing devices and seal cooling account for only a small fraction of the energy consumed by pumps. In can be readily shown that significant energy savings have been achieved by thoughtful sealing practices. The general narrative and the implications conveyed by our case studies give visibility to the issues and provide guidance to the user.

Troița - „Răstignire” - lucrare monumentală cu caracter religios, de for public - mozaic - abordare plastică de factură contemporană amplasată în spațiul ambiental urban

2018 ◽  
Vol 32 ◽  
pp. 14-28
Author(s):  
Andrei Florian ◽  
Keyword(s):  
Technical Difficulty ◽  
Basic Structure ◽  
Stained Glass ◽  
High Complexity ◽  
Divine Inspiration ◽  
Religious Theme ◽  
Technical Solutions ◽  
The Given ◽  
Elaboration Process ◽  
Made In

The article presents briefly, in a personal vision, the execution of a public monumental work, with a religious theme, namely The Wayside Cross, with a step-by-step description of the phases of design and execution of the necessary components resulting from the project. The entire work is realized in a contemporary, personal innovative vision, and the variety of materials and techniques that were used are meant to emphasize the complexity of its building. The paper highlights the difficulties in establishing formal motives for the given theme and describes the moments when the Divine inspiration and protection were felt during the elaboration process, giving a very special note to the evolution and completion of the whole artistic approach. The mosaic - of pictorial type - is different from the slightly monochrome chromatics characteristic for the tradition of this type of monument-size representation. The basic structure of the cross pedestal, with candle shelves; the perfectly symmetrical, metallic, laced grids, of great technical difficulty; the side windows carefully made in the stained-glass technique – the Tiffany technique; the whole range of technical solutions for their installation inside the edifice that shelters the work, as well as the harmonic insertion of the complex into the ambiental atmosphere of the site, all these were challenges of high complexity. The result of this long execution process of about 5 months and its assembling in a unitary religious complex, namely the Wayside Cross, was received with real appreciation both by the priests of the parish in which it is located and by its parishioners, inhabitants of Între Lacuri district from Cluj-Napoca.

scholarly journals System/engineering Regularities of the Municipal Water Sector Development

2013 ◽  
Author(s):  
Keyword(s):  
Water Supply ◽  
Environmental Safety ◽  
System Engineering ◽  
Water Supply Systems ◽  
Structural Form ◽  
Water Sector ◽  
Municipal Water ◽  
Technical Solutions ◽  
The Given ◽  
Supply Systems

System engineering laws of big cities’ centralized water supply functioning and development have been stated in a structural form. This enables to define strategy of scientific research and updating of enginnering infrastructures of the municipal water sector. The given approach is applicable for substantiation of priority directions in the process of development and adoption of technical solutions on providing environmental safety for drinking water supply systems.

scholarly journals The current state and prospects of the nuclear power industry of China

2021 ◽  
pp. 104-108
Author(s):  
F. F. Sharipov
Keyword(s):  
International Economic ◽  
National Economy ◽  
Nuclear Power ◽  
Nuclear Energy ◽  
Power Industry ◽  
Nuclear Industry ◽  
Nuclear Power Industry ◽  
Current State ◽  
International Economic Cooperation ◽  
Technical Solutions

China’s nuclear energy ambitions, backed by the strong financial potential of the national economy, and the consequent desire to extend its successes in international economic cooperation to the nuclear industry have attracted the researchers’ attention to a closer examination of the current state and nuclear industry prospects of China, taking into account its technological component. The unfulfilled development plan for nuclear power in the 13th Five-Year Plan, as a result of systemic mistakes and failures in the projects selected for implementation, leads to the conclusion that it is necessary to involve foreign leaders in this field, including “Rosatom” corporation, which has in its portfolio virtually verified modern technical solutions. 

Institutional Structure of Modern Russia: Evolutionary Modernization

2004 ◽  
pp. 89-98
Author(s):  
S. Kirdina
Keyword(s):  
Economic Development ◽  
Main Idea ◽  
Institutional Structure ◽  
State Regulation ◽  
Self Organization ◽  
State Control ◽  
Strong State ◽  
Russian Economy ◽  
Socioeconomic Structure ◽  
The Given

The main idea of the paper is to explain the essence of transformation of the Russian economy on the basis of the new institutional matrices theory developed by the author. The paper focuses on the objective process of self-organization of socioeconomic structure on the given stage of Russia's development. It concludes that centralized regulation of the process of economic development will strengthen; at the same time, market elements will ever more actively be infused and spread; the result will be the expanded liberalization of market together with strong state regulation but acting under a more strict, flexible and committed system of state control.

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