scholarly journals Planning of heat supply of territories: model and algorithms

2018 ◽  
Vol 39 ◽  
pp. 02001
Author(s):  
Ekaterina E. Mednikova
Keyword(s):  
Mathematical Model ◽  
Heat Supply ◽  
District Heating ◽  
Systems Development ◽  
Important Task ◽  
Heat Supply Systems ◽  
The Mathematical Model ◽  
Supply Systems

The choice of direction of heat supply systems development in cities is an important task for the authorities, district heating companies and consumers. The author focuses on two main problems in heat supply development questions: territory zoning by type of heat supply and determination of economically feasible heat supply systems sizes. For the solution of these problems, the mathematical model and algorithms were developed. For the solution of this task algorithms were developed.

scholarly journals Determination of additional factors in assessing the reliability of heat supply systems

2019 ◽  
Vol 288 ◽  
pp. 012076 ◽  
Author(s):  
I G Akhmetova ◽  
A A Kalyutik ◽  
A V Fedukhin ◽  
O V Derevianko ◽  
L R Mukhametova
Keyword(s):  
Heat Supply ◽  
Heat Supply Systems ◽  
Supply Systems

scholarly journals Improving the efficiency of heat release regulation in centralized heat supply systems

2020 ◽  
pp. 81-97
Author(s):  
O Shelimanova ◽  
◽  
A. Kolienko ◽  
Keyword(s):  
Energy Source ◽  
Energy Efficiency ◽  
Control Systems ◽  
Heat Supply ◽  
Heat Dissipation ◽  
District Heating ◽  
Heating Systems ◽  
District Heating Systems ◽  
Heat Supply Systems ◽  
Supply Systems

Ensuring optimal hydraulic and thermal regimes in district heating systems (DHS) in the regulation of heat supply is an important factor in improving the energy and economic efficiency of DHS. In addition, high efficiency of the HS system is a factor that can ensure the preservation of its vital functions. Solving the problem of increasing the energy efficiency of the heat supply system is a complex problem that requires changes at all stages of heat transformation: in the energy source, heating networks and subscriber heating systems of heat consumers. The purpose of this study is to identify the impact of heat dissipation control processes in district heating systems on their energy and economic efficiency, provide recommendations for improving control processes taking into account modern challenges and regulatory requirements, analyze heat dissipation temperature schedules and select the optimal temperature schedule. It is shown that the optimal is the combined quantitative and qualitative regulation of heat release, which should be carried out both at the energy source and at consumers. The paper considers the possibility of using combined control systems in the existing district heating systems of Ukrainian cities. It is shown that the achievement of high energy efficiency is possible only with the introduction of automatic individual heating points with weather control and pressure drop regulators at the inlet to the buildings in the subscriber heating systems. Calculations of the amount of heat consumption reduction of centralized heat supply systems with the introduction of optimal control systems are performed.

On the feasibility and possibility of heating water for district heating systems through the use of heat of the main condensate after cogeneration turbines

2018 ◽  
Vol 11 (2) ◽  
pp. 117-125
Author(s):  
M. E. Orlov ◽  
M. M. Zamaleev ◽  
A. V. Kuz’min ◽  
V. I. Sharapov
Keyword(s):  
Energy Efficiency ◽  
Heat Supply ◽  
District Heating ◽  
Feed Water ◽  
Regression Equations ◽  
Regeneration System ◽  
District Heating System ◽  
Makeup Water ◽  
Heat Supply Systems ◽  
Supply Systems

The possibilities of increasing the efficiency of cogeneration turbines of CHP plants through the use of low-potential heat carriers for water heating in district heat supply systems and increasing the generation of CHP electricity are considered. The existing technologies of heating the makeup water of the district heating system upstream water treatment apparatuses do not always provide the required heating temperature and do not have the sufficient energy efficiency. The technologies of using the main condensate of the exhaust steam in the turbine to heat the feed water in additional heaters included in the system of regeneration of cogeneration turbines are developed. The use of these technologies contributes to increasing the flow rate and reducing the enthalpy of the steam of regenerative outlets of the turbine used to heat this condensate, and, therefore, increases the combined heat and power generation. In order to determine the industrial applicability of the proposed solutions, experimental studies of the regeneration systems of turbo-units under the conditions of Ulyanovsk СHPPs-1 have been carried out. Multiparameter data arrays on operation of turbine condensate-feed path have been collected, and regression equations have been obtained to calculate the main condensate flow temperatures depending on various factors. On the basis of experimental data there have been calculated the minimum and maximum flow rates of feed water that can be heated to the desired temperature in the surface heaters included in the regeneration system of the turbines, the flow graphs of the heated feed water are constructed depending on the temperature of the main condensate after the turbines. The fields of application of the proposed technological solutions in operating heat supply systems are defined. The evaluation of energy efficiency is carried out using the method of specific generation of CHP electricity and conventional fuel economy at the implementation of the proposed solutions is calculated.

Experimental Research of Thermo-Hydraulic Separators and Dispatchers in Heat Supply Systems

2018 ◽  
Vol 284 ◽  
pp. 1385-1389 ◽  
Author(s):  
Y.V. Yavorovsky ◽  
D.O. Romanov ◽  
V.G. Khromchenkov
Keyword(s):  
Low Temperature ◽  
Experimental Research ◽  
Heat Supply ◽  
District Heating ◽  
Ansys Fluent ◽  
Heating Systems ◽  
Experimental Part ◽  
District Heating Systems ◽  
Heat Supply Systems ◽  
Supply Systems

This article is concerned with the research of thermos-hydraulic separators and dispatchers (THD) in heat supply systems and focuses on the experimental part of the research. Тhe experiments allowed to develop the ANSYS Fluent model in terms of accuracy and veracity. The developed model allows to predict operation of THD in different regimes. The results may be used for designing the systems with THD. Such systems may be low temperature district heating systems, where THD allow to hydraulically separate the circuits from each other.

scholarly journals Analyzing the Tendencies in the Development of Centralized Heat Supply in Ukraine

2021 ◽  
Vol 8 (523) ◽  
pp. 68-81
Author(s):  
M. O. Kyzym ◽  
◽  
Y. I. Kotliarov ◽  
V. Y. Khaustova ◽  
◽  
...  
Keyword(s):  
Heat Supply ◽  
District Heating ◽  
Climatic Conditions ◽  
Heat Energy ◽  
Investment Projects ◽  
Current State ◽  
Technological Modernization ◽  
Legislative Framework ◽  
Heat Supply Systems ◽  
Supply Systems

The article is aimed at defining the main tendencies in the development of centralized heat supply in Ukraine. Objective prerequisites for the use of centralized heating sources, as well as levels of development of heat supply systems of settlements are identified. It is determined that the development of heat supply systems largely depends on climatic conditions and the climatic characteristics of certain cities of Ukraine are considered. The main stages of construction of district heating systems in localities of Ukraine are formed. Types of heat supply of cities of Ukraine are identified. The genesis of development of heat generation and heat supply processes in Ukraine is researched. The peculiarities of formation of the national legislative framework for regulation of issues on production and consumption of heat energy are analyzed. The provisions of the Concept for the implementation of the State policy in the sphere of heat supply are analyzed. Based on the carried out analysis, it is determined the following: firstly, the imbalance of financial capabilities and needs for financing investment projects of heat supplying enterprises, as well as a shortage of investment resources, which requires careful substantiation of investment programs, directions and order of modernization and reconstruction of available capacities; secondly, shifting the focus to the powers of local authorities (through decentralization of public administration), which received broad powers to license and set tariffs for heat energy, but at the same time received a wider range of obligations to maintain heat supply systems in working condition; thirdly, the lack of medium- and long-term planning for the development of heat supply systems in localities, which largely explains the current state of the heat supply sector. It is substantiated that such features of the current state of heat supply in Ukraine require the development of new approaches to planning and implementation of works on organizational-technological modernization of heat supply in conditions of limited financial resources.

scholarly journals Modernization for cogeneration and district heating systems in urban areas: objectives and practice

2018 ◽  
Vol 11 (3) ◽  
pp. 184-191
Author(s):  
V. I. Sharapov ◽  
M. E. Orlov ◽  
M. M. Zamaleev ◽  
P. E. Chaukin
Keyword(s):  
Urban Areas ◽  
Heat Supply ◽  
Power Plants ◽  
District Heating ◽  
Combined Heat And Power ◽  
Heat Sources ◽  
Heating Systems ◽  
District Heating Systems ◽  
Heat Supply Systems ◽  
Supply Systems

The factors determining the need for modernization of urban district heating systems with combined heat and power are considered. It is noted that these factors include a significant reduction in thermal loads, new technical and technological opportunities for improving district heating systems, the change in legislation in the field of energy and heat supplying. It is shown that the main disadvantage of the current state of Russian cogeneration systems is a decrease in the combined production of heat and power, leading to a decrease in the efficiency of fuel use, due to unreasonably extensive use of autonomous heat supply sources in many regions. Besides, combined heat and power plants (CHPP) experience a lack of a level playing field in competition with other power plants in the electricity market, with a technically and economically unjustified ban imposed on open heat supply systems. For effective use of the benefits of cogeneration and district heating, the following top priority measures are recommended. It is required to legislate the economic benefits for the combined production of electricity and heat. It is necessary to adjust the model of the wholesale electric energy and power market to eliminate discrimination of CHPP in this market. The construction of autonomous heat sources in urban areas with CHPPs is to be prohibited unless substantiated with an adequate feasibility study. Decommissioning of CHPPs and heat sources, which are used to back up CHPPs, must only be permitted subject to a mandatory feasibility study, including assessment of effects on reliability of heat supply of urban consumers. The Russian Federal Law “On heat supply” is to be adjusted to lift the total ban on the use of open heat supply systems. It is required to create a national body with sufficient authority to control and coordinate the activities of energy companies to modernize cogeneration and district heating systems.

scholarly journals Methodology for the Optimal Development of District Heating Systems: Theoretical and Practical Research

2020 ◽  
Vol 209 ◽  
pp. 02028
Author(s):  
Ivan Postnikov ◽  
Andrey Penkovskii ◽  
Ekaterina Mednikova
Keyword(s):  
Heat Supply ◽  
District Heating ◽  
Heating Systems ◽  
Fuel Supply ◽  
Market Participants ◽  
Irkutsk Region ◽  
District Heating Systems ◽  
Comprehensive Reliability ◽  
Supply Systems

The paper presents a synthesis of research results on the development of scientific and methodo-logical support for the comprehensive solution of the main technical, economic and organizational problems of designing, functioning and development of modern district heating systems (DHS). These studies were conducted at the Melentiev Energy Systems Institute of SB RAS (Irkutsk city) by the scientific team of the Laboratory of Heat Supply Systems. Within the framework of the developed scientific and methodological support, the following basic problems were solved: optimization of levels of district heating in DHS with feasibility study for connecting new consumers, selection of optimal forms and models of heating market for DHS, comprehensive analysis and ensuring (optimization) reliability of DHS taking into account the fuel supply of heating sources (HS), and other additional problems. Based on the developed scientific and methodological ensuring following practical researches were carried out on existing DHS schemes of cities of the Irkutsk region: optimal management of DHS in Angarsk, Irkutsk region, taking into account the diverging interests of heating market participants; determination of the optimal scale of development of the existing DHS in Irkutsk based on the optimization of the effective heat supply radius taking into account the reliability of heating to consumers; comprehensive reliability analysis of DHS in Shelekhov of Irkutsk region, taking into account the fuel supply to HS.

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