scholarly journals Geothermal heat supply systems

2019 ◽  
pp. 85-86
Author(s):  
Anna Aleksandrovna Malysheva
Keyword(s):  
Heat Supply ◽  
Geothermal Heat ◽  
Heating Systems ◽  
Geothermal Heating ◽  
Hydrogeological Parameters ◽  
Heat Supply Systems ◽  
Supply Systems

The issues of evaluating the effectiveness of geothermal heating systems are regarded. These options indicate the possibility of obtaining different energetic effect with the same hydrogeological parameters.

scholarly journals Heat Pump Cycle Efficiency for Heat Supply

2020 ◽  
pp. 136-142
Author(s):  
Mykola Bosiy ◽  
◽  
Olexandr Kuzyk ◽  
Keyword(s):  
Heat Pump ◽  
Heat Supply ◽  
Exergy Analysis ◽  
Conversion Factor ◽  
Working Fluid ◽  
Heating Systems ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Heat Supply Systems ◽  
Supply Systems

The aim of the article is to analyze the literature and scientific publications on the effectiveness of the heat pump in heat supply systems and to study the efficiency of using the steam compression cycle of a heat pump in a heat supply system. Тo conduct energy and exergy analysis of heat pump efficiency indicators, the working fluid of which is freon R134a, when using natural waters as a source of low-potential thermal energy. The article analyzes the literature sources and scientific publications on the effectiveness of the heat pump in heat supply systems. The results of research of efficiency of application of the heat pump in systems of heat supply at use of natural waters as a source of low-potential thermal energy are presented. Energy and exergy analysis of heat pump efficiency indicators, the working fluid of which is R134a freon, was performed. The energy efficiency of the heat pump cycle was determined by the conversion factor of the heat pump. The thermodynamic efficiency of the heat pump in heat supply systems was evaluated using exergetic efficiency, which is one of the main indicators of the efficiency of heat pump processes and cycles. The calculation of energy indicators of the heat pump, such as: specific heat load in the evaporator and condenser, as well as the conversion factor of the heat pump. The calculation of exergetic efficiency for ambient temperature from +10 to -10 ºC. Thus, the energy and exergy analysis of the efficiency of the heat pump, the working fluid of which is Freon R134a with a conversion factor = 4.8. This indicates that the heat pump is a reliable, highly efficient, environmentally friendly source of energy for use in heating systems. A heat pump heating system will always consume less primary energy than traditional heating systems if natural water is used as a low-temperature heat source for the heat pump. The efficiency of the steam compression cycle of the heat pump largely depends on the temperature of low-potential heat sources. The use of HV in heating systems reduces greenhouse gas emissions compared to conventional types of heat supply, which is relevant to the ecological state of the environment.

FORMATION OF STRUCTURAL GRAPHS FOR SOLVING LOAD FLOW ANALYSIS IN THE PROBLEMS OF SECURITY OF HEAT SUPPLY SYSTEMS

2016 ◽  
Vol 8 (4) ◽  
pp. 49-53
Author(s):  
Мезенцев ◽  
A. Mezentsev ◽  
Сазонова ◽  
Svetlana Sazonova
Keyword(s):  
Heat Supply ◽  
Flow Analysis ◽  
Flow Distribution ◽  
Load Flow ◽  
Practical Implementation ◽  
Heating Systems ◽  
Structural Graph ◽  
Load Flow Analysis ◽  
Heat Supply Systems ◽  
Supply Systems

The article is devoted to the formation of structural graph technology for heating systems in solving problems of analysis. Variants subscriber subsystem hardware design of heating systems and the corresponding fragments of the structural graph to solve the problems of the analysis of flow distribution in the unperturbed and perturbed states, respectively. Analysis of flow distribution is required for the practical implementation of tasks in order to ensure the safety of the systems under consideration.

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.

Experience and Prospects of Using Solar Energy for Heating Supply in Russia

2018 ◽  
pp. 26-60
Author(s):  
Vitaliy A. Butuzov ◽  
Vitaly V. Butuzov ◽  
Elena Bryantceva ◽  
Ilya Gnatyuk
Keyword(s):  
Solar Radiation ◽  
Solar Collector ◽  
Heat Supply ◽  
Solar Collectors ◽  
Heating Systems ◽  
Solar Heat ◽  
Diffuse Solar Radiation ◽  
Weather Stations ◽  
Heat Supply Systems ◽  
Supply Systems

Approaches to the organization of solar heat supply in Russia have a number of differences in comparison with the global experience, in particular, in the field of processing solar radiation data, designing solar collector designs, design techniques, construction and testing of solar heating systems, and the practice of creating and using solar plants. Examples of implementation of projects for creating heat supply systems in different regions of Russia are presented, from the southern (Krasnodar Territory) to the northern (Yakutia). A methodology for converting data for direct and diffuse solar radiation of NASA by taking into account the results of measurements of weather stations, which provides the possibility of their practical use, is presented. Data on the number, types, annual volumes of supplies, and names of producers of solar collectors in Russia are presented. Methodical approaches to the development of solar collectors structures based on the results of comparing the energy consumption for their production with the amount of energy produced by them during their lifetime are considered. A comparative analysis of solar design methodology in Russia and in Europe has been performed. Prospects for the construction of solar heat installations in Russia up to 2030 are considered.

CURRENT STATE OF RESEARCH AND OPERATION GEOTHERMAL HEAT SUPPLY SYSTEMS IN DAGESTAN

2020 ◽  
Author(s):  
A.B. Alkhasov ◽  
◽  
V.A. Butuzov ◽  
R.M. Aliev ◽  
G.B. Badavov ◽  
...  
Keyword(s):  
Heat Supply ◽  
Geothermal Heat ◽  
Current State ◽  
Heat Supply Systems ◽  
State Of Research ◽  
Supply Systems

Дагестан в России занимает первое место по разведанным запасам геотермальных вод и второе после Камчатки по их добыче. На 13 разведанных месторождениях пробурено 141 геотермальная скважина, из которых 4 эксплуатируется с 48 скважинами. Отмечено, что в Дагестане пробурены самые глубокие геотермальные скважины – 5500 м с дебитами до 7000 м3/сутки, а максимальная добыча геотермальной воды была достигнута в 1988 г – 9,4 млн. м3 в год. Анализируются достижения дагестанской геотермальной научной школы. Преемником академической геотермии Дагестана в настоящее время является Институт проблем геотермии и возобновляемой энергетики ОИВТ РАН. Описаны производственные структуры по бурению и эксплуатации геотермальных месторождений. Наибольшие успехи геотермии в СССР связаны с деятельностью НПО «Союзбургеотермия» (г. Махачкала) и его шестью региональными управлениями. Максимальная добыча геотермальной воды в СССР была в 1988 г. – 60 млн. м3. Геотермальные ресурсы Дагестана определяются тремя основными структурно-гидрогеологическими этажами [4]: плиоценовым, миоценовым и мезозойским, изолированными друг от друга пластами глин. Анализ добычи геотермальной воды с 1966-2019 гг. (55 лет) показал, что с 1997 г он изменялся от 3500 до 4500 тыс. м3 в год. Приведены основные характеристики разведанных и эксплуатируемых месторождений Дагестана: Кизлярского, Тернаирского, Избербашского. Описаны структуры и способы разработки месторождений. Указано, что наиболее полную информацию содержат отчеты института «ВНИПИгеотерм». Анализируется опыт создания Дагестанской ГеоТЭС, геотермальных циркуляционных систем (ГЦС), совместно-раздельной добычи геотермальной воды разных геологических горизонтов. Приведен пример успешной реализации поверхностной системы геотермального теплоснабжения (СГТ) с гелиоустановкой на полигоне ИПГВЭ в Махачкале. Представлены данные об опыте предотвращения отложений солей и коррозии оборудования и трубопроводов, а также нейтрализации фенолов при сбросе отработанной геотермальной воды в поверхностные водоемы. Описана концепция создания в Дагестане СГТ, их основные характеристики. Представлены типовые схемы эксплуатируемых термораспределительных станций (ТРС) в Махачкале, Кизляре, Избербаше общей тепловой мощностью 35 МВт с годовым отпуском тепловой энергии 148 тыс. МВт·ч/год. Предложена перспективная схема геотермального теплоснабжения для условий Дагестана.

The Use of Phosphate Compositions for Chemical Treatment of Make-Up Water in Centralized Heat Supply Systems

2021 ◽  
Vol 316 ◽  
pp. 605-609
Author(s):  
I.V. Ponurko ◽  
S.A. Krylova ◽  
A.S. Limarev ◽  
I.Y. Mezin
Keyword(s):  
Chemical Treatment ◽  
Heat Supply ◽  
Improve Quality ◽  
Water Heating ◽  
Heating Systems ◽  
Heat Supply Systems ◽  
Corrosive Activity ◽  
Supply Systems ◽  
Positive Effect

The paper investigates two different protective phosphate compositions for the chemical treatment of water and the use of them with a view to improve quality of “make-up” water in water heating systems. The research proved a positive effect of reducing the corrosive activity of water and the amount of scale.

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.

MATHEMATICAL MODELING OF THE PARAMETRIC RESERVE OF HEAT SUPPLY SYSTEMS TO ENSURE OPERATIONAL SAFETY

2019 ◽  
Vol 12 (3) ◽  
pp. 71-77
Author(s):  
Светлана Сазонова ◽  
Svetlana Sazonova ◽  
Сергей Николенко ◽  
S. Nikolenko ◽  
Алла Звягинцева ◽  
...  
Keyword(s):  
Mathematical Models ◽  
Heat Supply ◽  
Computational Experiment ◽  
Safe Operation ◽  
Heating Systems ◽  
Emergency Situations ◽  
Heat Supply Systems ◽  
Object Of Study ◽  
The Impact ◽  
Supply Systems

The procedure of forming a transport (parametric) reserve for heating systems of cities and settlements in cases of increasing line diameters with a constant network configuration is considered. For functioning heat supply systems, the formation of a reserve will ensure uninterrupted and safe operation. Safe operation is supposed to be ensured through analysis and prevention of possible emergency situations. The development of mathematical models of the transport reserve is based on the energy equivalent of subscriber subsystems of heating systems, which distinguishes the obtained mathematical models from existing analogues. To evaluate the impact of parametric optimization results on economic indicators, a computational experiment was conducted. As an object of study, the design scheme of a residential microdistrict was considered. The analysis of the obtained results of the computational experiment proved the operability of the obtained mathematical models of transport reservation for functioning heat supply systems. It is possible to make transport reservation for systems of any sizes and configurations or for the studied fragments of these systems. For practical application, it is of interest to calculate the parametric reserve of individual houses that have autonomous boiler rooms.

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.

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