scholarly journals Principles of process modeling of the heat supply systems operation

2018 ◽  
Vol 196 ◽  
pp. 02052
Author(s):  
Anna Doroshenko ◽  
Anastasiya Yusupova
Keyword(s):  
Process Modeling ◽  
Heat Supply ◽  
Heat Supply System ◽  
Qualitative Assessment ◽  
System Operation ◽  
Special Software ◽  
Simulated System ◽  
Pipeline Route ◽  
Heat Supply Systems ◽  
Supply Systems

The problem of process modeling of heat supply systems operation with the appropriate of the special software is presented in the article. The purpose of the simulation is to identify the most likely and dangerous accidents, the quantitative and qualitative assessment of them, the frequency of their occurrence, the size of the damage, etc. The implementation of the solution presented in the work is already useful at present to improve the design and further operation of heat supply systems, and as a consequence also for consumers of thermal energy. The use of simulated modeling of heat supply system operation processes significantly reduces the strength calculation time, allows simulating various pipeline route configurations, performing their comparative analysis, and choosing optimal characteristics for the simulated system.

Improvement of the methodology assessment of reliability heat supply systems at the facilities of main pipelines

2021 ◽  
pp. 198-202
Author(s):  
Марина Николаевна Ильина ◽  
Дмитрий Васильевич Ларюшкин
Keyword(s):  
Cluster Analysis ◽  
Heat Supply ◽  
Network Reliability ◽  
Reliability Assessment ◽  
Heat Supply System ◽  
Operating Conditions ◽  
Heat Network ◽  
Heat Networks ◽  
Heat Supply Systems ◽  
Supply Systems

Источником информации о техническом состоянии трубопроводов тепловых сетей объектов магистральных нефтепроводов ПАО «Транснефть» являются результаты их обслуживания и ремонта, технического освидетельствования, гидравлических испытаний и т. д. На основании этих данных проводятся расчеты показателей надежности, по итогам анализа которых осуществляется планирование дальнейшего технического обслуживания и ремонта. Однако при оценке надежности систем теплоснабжения необходимо учитывать не только срок эксплуатации и величину амортизационного износа, но и реальное состояние в конкретных условиях функционирования. Учесть многообразие факторов, которые влияют на работоспособность трубопроводов системы теплоснабжения, и тем самым повысить точность расчетов при оценке их остаточного ресурса позволяет применение кластерного анализа в дополнение к используемой методике оценки надежности тепловых сетей. В рамках настоящей работы оценка надежности объектов АО «Связьтранснефть» с применением кластерного анализа проведена на примере равнозначных участков тепловых сетей двух узлов связи, расположенных в Краснодарском крае и Республике Саха (Якутия). Currently, information about technical condition of pipelines of heat supply systems at the facilities of the main oil pipelines of PJSC Transneft is formed based on the results of maintenance and repair, technical inspection, hydraulic tests, etc. Upon these data, calculations of reliability indicators of heat networks are carried out, based on the analysis of calculations further maintenance and repairs are planned. However, when assessing the reliability of heat supply systems, it is necessary to take into account not only the service life and the amount of depreciation wear of heat network elements, but also their real state in specific operating conditions. The use of cluster analysis in addition to the currently used method of heat network reliability assessment allows us to take into account the variety of factors that affect the operability of pipelines of the heat supply system, and thereby increase the accuracy of calculations when assessing their residual resource. Within the framework of this work, the reliability assessment of Svyaztransneft JSC facilities using cluster analysis was carried out on the example of equivalent sections of heat networks of two communication nodes located in the Krasnodar Territory and the Republic of Sakha (Yakutia).

scholarly journals Efficiency of systems of heat supply with introduction of automated individual heating substations

2019 ◽  
Vol 124 ◽  
pp. 01026
Author(s):  
Yu. N. Zvonareva ◽  
Sh. G. Ziganshin ◽  
E. V. Izmaylova ◽  
A. S. Gavrilov ◽  
A. V. Moryashev ◽  
...  
Keyword(s):  
Performance Indicators ◽  
System Performance ◽  
Heat Supply ◽  
Heat Supply System ◽  
Supply System ◽  
Research Results ◽  
Heat Supply Systems ◽  
Supply Systems

Article is devoted to increasing efficiency of heat supply systems. We demonstrate research results and an analysis of dependences of overall heat supply system performance indicators at various levels of equipment of consumers with the automated individual heating substations.

scholarly journals ABOUT THE ALIGNMENT DESIGN OF HEAT SUPPLY SYSTEMS ON THE BASIS OF SYSTEM ANALYSIS

2020 ◽  
pp. 35-45
Author(s):  
A. V. Loboda ◽  
A. A. Chuikina
Keyword(s):  
Heat Supply ◽  
Optimization Problem ◽  
System Analysis ◽  
Heat Supply System ◽  
Supply System ◽  
Optimal Solutions ◽  
Mathematical Problems ◽  
Heat Supply Systems ◽  
Supply Systems ◽  
Weight Coefficients

Statement of the problem. The aim of the article is to develop procedures for translating practical questions about the choice of optimal routes of the heat supply system into mathematical problems of multi-criteria optimization and the study of these problems taking into account a large number of different parameters of the system and their connections.Results and conclusions. A mathematical description is compiled of the route choosing problem for the heat supply system based on the methods of system analysis. As optimized criteria, the integrated parameters are discussed describing the main characteristics of the systems under consideration. Unification of the problem where some of the criteria must be minimized and the other one maximized is carried out by replacing the minimized criteria with inverse values. Using the example of the modeling problems the procedures are shown for finding optimal solutions. The visibility of such procedures is provided by the use of a quadratic (Euclidean) norm instead of the traditional summation of weight coefficients. The importance of correct scaling and choice of weight factors is shown in the study of the discussed multi-criteria optimization problem.

scholarly journals Reconstruction of power systems of small cities and rural settlements

2020 ◽  
pp. 91-93
Author(s):  
Natalya Anatolyevna Kharlamova
Keyword(s):  
Power Systems ◽  
Heat Supply ◽  
Heat Supply System ◽  
Supply System ◽  
Investment Policy ◽  
Rural Settlements ◽  
Small Cities ◽  
Basic Principles ◽  
Heat Supply Systems ◽  
Supply Systems

The basic principles of developing measures for the reconstruction of elements that make up the heat supply system, including heat consumers, heat networks and heat supply sources, are considered. Some issues of organizing the reconstruction and modernization of heat supply systems for the purpose of energy saving and the specifics of investment policy are analyzed.

scholarly journals INCREASING THE RELIABILITY OF HEATING SYSTEMS

2020 ◽  
Vol 46 (4) ◽  
pp. 197-204
Author(s):  
R. A. Shershenov ◽  
A. Yu. Efimov ◽  
V. Yu. Shmakov
Keyword(s):  
Heat Supply ◽  
High Efficiency ◽  
Heat Supply System ◽  
Heating System ◽  
Supply System ◽  
The State ◽  
Additional Costs ◽  
Heat Supply Systems ◽  
Reliability Of Operation ◽  
Supply Systems

Objectives. The study was aimed at improving the reliability of heat supply systems. At present, this is one of the most relevant topics in the field of heat supply. The issue of reliability of heat supply is of great importance in terms of the safety of citizens and the state as a whole. Due to the severity of winter conditions and risk of hypothermia, heat supply security can be considered to be as critical as food security. Therefore, the reliability of heat supply systems becomes one of the most important aspects of the security of the state.Method. The study was carried out using the method of reservation of the heat supply system by looping.Result. In order to avoid the defrosting of the heat supply system and reduce additional costs, a redundancy scheme was proposed with one-way connection to the looped main pipelines, additionally looping the pipelines of the heat supply systems between two boiler rooms. The calculation of losses in the event of an emergency in the heating system was carried out.Conclusion. The most important problem requiring immediate solution is how to increase the reliability and redundancy of the heat supply system itself, in order to achieve minimal discomfort for consumers of heat energy at the time of failure of the source or transmission of the heat supply system. The proposed method for increasing the reliability of operation of heat supply systems is characterized by a high efficiency, since allows the number of idle hours and the total amount of short-received heat to be reduced. 

Optimal Expansion and Reconstruction of Heat Supply Systems

2013 ◽  
Vol 2 (4) ◽  
pp. 59-79 ◽  
Author(s):  
V. A. Stennikov ◽  
T. B. Oshchepkova ◽  
N. V. Stennikov
Keyword(s):  
Heat Supply ◽  
Optimal Allocation ◽  
Heat Supply System ◽  
Real Problem ◽  
Supply Networks ◽  
System A ◽  
Pumping Stations ◽  
Heat Supply Systems ◽  
Integrated Technique ◽  
Supply Systems

The paper addresses the issue of optimal expansion and reconstruction of heat supply systems, which includes a set of general and relatively specific problems. Therefore, a comprehensive approach to their solving is required to obtain a technically admissible and economically sound result. Solving the problem suggests search for effective directions in expansion of a system in terms of optimal allocation of new heat sources, their type, output, operating area; construction of new heat networks, their schemes and parameters; optimal detection of “bottlenecks” in the system and ways of their elimination (expansion, dismantling, replacement, strengthening of heat pipeline sections, construction of pumping stations and other components of heat supply networks). The authors present a mathematical statement of the problem, its decomposition into separate subproblems and an integrated technique to solve it. Consideration is given to a real problem solved for a real heat supply system. A set of arising problems is presented. The application of developed methodological and computational tools is shown.

scholarly journals Pathways for sustainable development of urban heat supply systems

2020 ◽  
Vol 208 ◽  
pp. 04001
Author(s):  
Dalia Štreimikienė ◽  
Wadim Strielkowski ◽  
Evgeny Lisin ◽  
Galina Kurdiukova
Keyword(s):  
Sustainable Development ◽  
Heat Supply ◽  
Heat Supply System ◽  
Heat Sources ◽  
Maximum Heat ◽  
The Sustainable Development ◽  
Economic Relations ◽  
Urban Heat ◽  
Heat Supply Systems ◽  
Supply Systems

Our paper focuses on the development of effective pathways for ensuring sustainable development of urban heat supply systems in the context of liberalization of economic relations in the energy sector. Using the example of the Moscow region, we reveal regularities in the change in the structure of heat sources and the organization of the main elements of the heat supply system. In addition, we propose an improved method for the formation of the marginal tariff for heat taking into account the structure of heat sources and allowing to eliminate the existing disadvantages of introducing market-based pricing methods. Moreover, we develop a mechanism for the sustainable development of centralized heat supply systems based on the organization of competitive selection of heat suppliers and the method of forming the maximum heat tariff.

scholarly journals Calculation of Nodal Prices for Heat Energy in Heat Supply Systems

2020 ◽  
Vol 209 ◽  
pp. 06020
Author(s):  
Andrey Penkovskii ◽  
Oleg Khamisov ◽  
Angelica Kravets
Keyword(s):  
Heat Supply ◽  
Flow Distribution ◽  
Heat Supply System ◽  
Supply System ◽  
Heat Energy ◽  
Network Distance ◽  
Practical Research ◽  
Heat Supply Systems ◽  
Nodal Prices ◽  
Supply Systems

The article is devoted to the calculation of nodal prices for heat energy in heat supply systems. The problem, mathematical model and method of calculating nodal prices of heat energy for all consumers of the heat supply system considered, taking into account the different cost of heat production by sources, optimal flow distribution, and placement of consumers in the heat network (distance from the source). As the main computational tool for calculating nodal prices for heat energy, the Lagrange multiplier method used in the problem of modes optimizing in heat supply system, which allows explaining in detail the formation of the price for heat energy in each node. With the help of the proposed methodological support, practical research has been carried out for real heat supply system.

scholarly journals ENERGY EFFICIENT SOLAR HEAT SUPPLY SYSTEMS FOR BUILDINGS AND STRUCTURES

2021 ◽  
Vol 2021 (1) ◽  
pp. 137-142
Author(s):  
Vasyl Zhelykh ◽  
◽  
Mariana Kasynets ◽  
Khrystyna Myroniuk ◽  
Uliana Marushchak ◽  
...  
Keyword(s):  
Solar Energy ◽  
Solar Collector ◽  
Heat Supply ◽  
Heat Supply System ◽  
Solar Collectors ◽  
Actual Problem ◽  
Solar Heat ◽  
Advantages And Disadvantages ◽  
Heat Supply Systems ◽  
Supply Systems

Today, the energy sector of Ukraine requires significant consumption of traditional energy sources (oil, gas, coal, nuclear energy). However, their use is associated with a number of difficulties, including thermal, chemical, and radioactive contamination of the environment and the exhaustion of their reserves. The paper is devoted to solving the actual problem of improving the efficiency of solar heat supply systems with solar collectors. An analysis of the potential of solar energy and existing solar heat supply systems is presented. The advantages and disadvantages of various solar collector designs and methods of their research are analyzed. The analysis of the main directions for improving the efficiency of solar collectors and solar heat supply systems, in general, is presented. An improved solar heat supply system with the proposed design of a solar collector is obtained and its temperature characteristics are established depending on the intensity of solar energy intake.

scholarly journals INVESTIGATION OF THE POSSIBILITY OF USING A VORTEX HEAT GENERATOR IN HEAT SUPPLY SYSTEMS FOR RESIDENTIAL, INDUSTRIAL AND PUBLIC BUILDINGS

2018 ◽  
Vol 61 (2) ◽  
pp. 159-166 ◽  
Author(s):  
I. L. Iokova ◽  
E. N. Tarasevich
Keyword(s):  
Energy Conversion ◽  
Rotational Speed ◽  
Heat Supply ◽  
Conversion Factor ◽  
Rotation Frequency ◽  
Heat Supply System ◽  
National Academy Of Sciences ◽  
Heat Generator ◽  
Heat Supply Systems ◽  
Supply Systems

In a number of foreign countries, vortex heat generators have become widespread in decentralized heat supply systems. For Belarus, vortex heat generators are quite new sources of heat supply. The article considers the possibility of using vortex heat generators for heat supply systems for residential, public and industrial buildings. Vortex heat generators are based on the principle of cavitation in a turbulent water flow. For many devices cavitation is not desirable, but in a vortex heat generator it is used as a favorable phenomenon. The authors carried out a series of full-scale experiments to determine the efficiency of the “VTG-2.2” vortex heat generator when different operating modes were applied. The performance of the vortex heat generator can be estimated by the energy conversion factor. Energy conversion factor is the ratio of the amount of thermal energy that a vortex heat generator generates to the amount of electrical energy consumed. Experiments conducted in a number of research organizations (including the National Academy of Sciences of Ukraine and MPEI) have demonstrated that energy conversion factor can exceed 1. The authors conducted experimental tests with the use of an experimental installation simulating a heat supply system. According to the obtained experimental data, the energy conversion coefficients for each mode were calculated. The constructed graphical dependencies clearly demonstrate that, with increasing rotational speed of the vortex heat generator, the efficiency of its use increases. The highest energy conversion factor value was 61.1 % with a rotation frequency of 40 Hz. It was also found that with increasing the rotational speed of the vortex heat generator, a significant increase in noise and vibration occurs.

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