scholarly journals Regional Gas Supply System Considered from the Standpoint of System Analysis and Regularities of its Functioning

2018 ◽  
Vol 61 (4) ◽  
pp. 359-371
Author(s):  
D. R. Mоroz ◽  
N. V. Hruntovich
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
System Analysis ◽  
Heating System ◽  
Supply System ◽  
Gas Flow Rate ◽  
Gas Consumption ◽  
Balance Structure ◽  
Supply Systems ◽  
Gas Supply

Investigation of the structure and the functional patterns of the regional gas supply systems is necessary for addressing a number of operational tasks, the main ones being the following: preparing requisitions for the planned volume of gas deliveries, project design for development and reconstruction of gas supply systems and gas storage facilities, developing of functional gas tariffs for different groups of customers. The regional gas supply system is considered from the standpoint of system analysis and presented as a complex dynamic system consisting of several subsystems. The balance structure of gas consumption in the region for the ten-year period and the patterns of daily gas consumption in the region depending on the average daily outdoor temperature for the two-year period have been studied. It is discovered that the power economy, industry and agriculture account for the largest share in the total gas consumption. The values of correlation coefficients between the outdoor air temperature and gas flow rate according to the elements of the balance structure are calculated. For the daily values of gas consumption for the needs of the population and housing-and-communal services, the highest correlation coefficient between the studied characteristics R is noted = (–0,98‒(–0,96)). Analysis of the matching fields of daily gas consumption in the region to the daily average temperature over a given one-year timeframe made it possible to identified two key areas, viz.: the area of operation of the heating system and the area of positive temperatures (the cheating system is off). For each of the areas, the dependences of the daily gas flow rate on the temperature and the effect of temperature changes on the gas consumption alteration were determined. It was found out that the temperature range from 0 to 10 °C corresponds to the zone of uncertain state of the regional gas supply system, since two areas overlap in this zone, viz.: the area of operation of the heating system and the area of positive temperatures.

scholarly journals The study of structural fields of daily gas consumption of the balance groups of the regional gas supply system

2020 ◽  
Vol 178 ◽  
pp. 01066 ◽  
Author(s):  
Deniz Moroz ◽  
Nadzeya Hruntovich ◽  
Nikolay Hruntovich ◽  
Svetlana Jhukovets ◽  
Aleksey Kapansky ◽  
...  
Keyword(s):  
Gas Flow ◽  
Balance Sheet ◽  
Supply System ◽  
Outdoor Temperature ◽  
Gas Consumption ◽  
Conducting Research ◽  
Balance Structure ◽  
Quantitative Indicators ◽  
Information Database ◽  
Gas Supply

The study of the balance sheet structure of the regional gas supply system is necessary to solve a number of operational tasks. An information database has been created for conducting research. It includes information on daily gas consumption and the actual average daily outdoor temperature for a six-year period for more than 539 elements of the balance structure of the regional gas supply system. The most significant factors determining gas consumption were identified for 7 enlarged balance groups. It´s investigated the dynamics of factors in time. The article presents the types of daily fields “gas flow – average daily outdoor temperature” for enlarged groups of the balance structure of the regional gas supply system. Four temperature areas were identified and substantiated in the daily fields. The assessment of qualitative and quantitative indicators characterizing the temperature areas is presented in the article.

scholarly journals Transformation of a mathematical model of gas flow distribution to solve the problems of gas supply system development

2020 ◽  
Vol 219 ◽  
pp. 02001
Author(s):  
Nikolay Ilkevich ◽  
Tatyana Dzyubina ◽  
Zhanna Kalinina
Keyword(s):  
Mathematical Model ◽  
Gas Flow ◽  
System Development ◽  
Flow Distribution ◽  
Supply System ◽  
Economic Environment ◽  
Gas Flows ◽  
Supply Systems ◽  
New Criteria ◽  
Gas Supply

This paper proposes taking into account new properties of gas supply systems in a mathematical model of flow distribution in comparison with the traditional formulation. The approach suggests introducing an arc coefficient, which allows for changes in the magnitude of gas flow passing along the arc, a vector of an increase in the arc throughput, and lower constraints on the gas flow along the arc. We also propose considering a new economic environment, namely, new criteria for optimizing the flow distribution and setting fictitious gas prices for consumers. These criteria enable us to take account of the priority gas supply to a definite group of consumers. As an example, the calculation of gas flows for the aggregated Unified Gas Supply System (UGSS) for 2030 is considered. This calculation takes into account the arc coefficients and the increase in the throughput of arcs.

scholarly journals THEORETICAL SUBSTANTIATION OF THE USE OF BIOMETHANE IN GAS SUPPLY SYSTEMS

2021 ◽  
Vol 6 (11) ◽  
pp. 49-57
Author(s):  
D. Suslov
Keyword(s):  
Alternative Energy ◽  
Supply System ◽  
Operating Conditions ◽  
Technological Parameters ◽  
Gas Network ◽  
Theoretical Substantiation ◽  
Gas Consumption ◽  
Effective Use ◽  
Supply Systems ◽  
Gas Supply

The work is devoted to the urgent problem of using an alternative energy source of biomethane for gas supply to settlements. The effective use of biomethane in gas supply systems requires scientific substantiation, considering the entire range of technological parameters and operating conditions. The methods of graphs and parametric optimization are used to minimize the total reduced costs to the gas supply system to carry out the research. Based on the analysis of gas consumption by the municipal districts of the Belgorod region, a graphical dependence is built and an expression is obtained to determine the annual gas consumption by the population on the population size. The calculation of the mass of organic waste and the density of substrate formation is made, on the basis of which the potential for biomethane production in the municipal districts of the Belgorod region is determined. It has been established that the potential volume of biomethane in the Belgorod region is 633194 thousand m3 / year, or 11% of the total gas consumption. A diagram of the location of biomethane plants and gas pipelines for supplying biomethane to gas networks has been built. The optimal values of the technological parameters of the biomethane gas supply system have been established: the operating range of the biomethane plant depending on the substrate formation density, the length of the gas network for biomethane supply, depending on the gas consumption density.

scholarly journals Environmental safety of the gas distribution system

2019 ◽  
Vol 91 ◽  
pp. 07016
Author(s):  
Elena Solovyeva
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Environmental Safety ◽  
Supply System ◽  
Operating Conditions ◽  
Gas Distribution ◽  
Complex Index ◽  
Gas Consumption ◽  
Supply Systems ◽  
Gas Supply

This article analyzes the causes of accidents on overhead gas pipelines. Special attention is paid to the operating conditions of gas distribution and gas consumption systems. The main measures aimed at reducing the environmental danger of gas supply systems operation have been identified. The main methods of increasing the reliability of gas distribution systems in the design of gas networks are considered. The complex index of reliability of gas distribution systems is used, which allows choosing the optimal version of the gas supply system.

scholarly journals Experimental Study on the Influence of Moisture Content during Gas Depressurization Extraction

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Yuexia Chen ◽  
Xuexi Chen ◽  
Jiang Xu ◽  
Tingxiang Chu
Keyword(s):  
Moisture Content ◽  
Flow Rate ◽  
Gas Flow ◽  
Effective Permeability ◽  
System Analysis ◽  
Volumetric Strain ◽  
Gas Pressure ◽  
Gas Flow Rate ◽  
Coal Deformation ◽  
The Relationship

Although there are many reports about the influence of moisture in the process of gas extraction, studies about the influence of moisture on gas flow, permeability, and coal deformation by experimental system analysis are lacking. Physical simulations of gas depressurization extraction using triaxial servo-controlled seepage equipment for hot-fluid-solid coupling were conducted. The gas flow rate, permeability, and strain were analysed during gas depressurization extraction. The relationship between gas flow rate and gas pressure was a quadratic polynomial. Permeability and strain changed continuously with the decrease of gas pressure and interacted with each other during gas depressurization extraction. In the initial stage, the effective permeability decreased. With the continuous decrease of gas pressure, the permeability gradually recovered. When the gas pressure dropped to about 0.6 MPa, the permeability increased rapidly and the corresponding volumetric strain increased gradually. With the increase of moisture content, the relationship between gas flow rate and gas pressure became less significant. The experiments showed that the higher the moisture content, the lower the effective permeability and the larger the volumetric strain.

scholarly journals Regularities of the formation of structural fields of daily gas consumption of the regional gas supply system

2020 ◽  
Vol 220 ◽  
pp. 01076
Author(s):  
Deniz Moroz ◽  
Nadzeya Hruntovich ◽  
Nikolay Hruntovich ◽  
Aliaksei Kapanski ◽  
Larisa Markaryants ◽  
...  
Keyword(s):  
Air Temperature ◽  
Moving Average ◽  
Heating System ◽  
Sensitivity Coefficient ◽  
Supply System ◽  
Outdoor Air ◽  
Temperature Ranges ◽  
Gas Consumption ◽  
Relative Change ◽  
Gas Supply

Daily statistics on the volume of gas consumption and the average daily outdoor air temperature for a six-year period were adopted as an information basis for scientific research with the matter of studying the functioning and developing of the regional gas supply system. For the regional gas supply system, the type of structural fields “daily gas consumption – average daily outdoor air temperature” was determined and their constancy over time was proved. For structural fields, 4 temperature ranges are allocated and a system of characterizing indicators was proposed. The regularities of the formation of daily gas consumption from the average daily outdoor air temperature for the proposed temperature ranges were established, the sensitivity coefficient of the relative change in the daily gas consumption with a relative daily change in the outdoor air temperature was determined. Daily models of the gas consumption dependence on the outdoor air temperature was developed, smoothed by a moving average over 30 days for two temperature regions: 1 - the area of the connected state of the heating system, 2 - the area of the disconnected state of the heating system. The seasonal coefficient of gas consumption was assessed.

DEVELOPMENT OF THE VISUALIZATION PROGRAM LOW NATURAL GAS FLOW MEASUREMENTS “CONTROL OF ENERGY RESOURCES: KER2 – HIGHWAY”

2020 ◽  
pp. 24-31
Author(s):  
О. А. Гнездилова
Keyword(s):  
Measurement Error ◽  
Flow Rate ◽  
Gas Flow ◽  
Energy Resources ◽  
Gas Flow Rate ◽  
Gas Industry ◽  
Flow Rates ◽  
Absolute Value ◽  
Operation Algorithm ◽  
Gas Consumption

Постановка задачи. Требуется усовершенствовать алгоритм программы «Контроль энергетических ресурсов: КЭР1 - газ», предназначенной для быстрого вычисления максимально допустимой погрешности измерения счетчиком газа в относительных единицах (%) и в абсолютном значении (м/ч) по текущему заданному расходу газа для различных типов счетчиков. Результаты. Рассмотрены основные проблемы программирования физических процессов измерения малых расходов газа. Показано описание программы измерения малых расходов газа. Разработана программа для ЭВМ и алгоритм работы «Контроль энергетических ресурсов: КЭР2 - магистраль», автоматизирующая вычисление максимально допустимой погрешности измерения счетчиком газа в относительных единицах (%) и в абсолютном значении (м/ч) по текущему заданному расходу газа, диаметру, давлению для различных типов счетчиков с учетом линейной скорости частиц в газовом потоке. Выводы. Впервые разработана программа ЭМВ «Контроль энергетических ресурсов: КЭР2 - магистраль», предназначенная для быстрого вычисления максимально допустимой погрешности измерения счетчиком газа в относительных единицах (%) и в абсолютном значении (м/ч) по текущему заданному расходу газа, диаметру трубопровода, давлению для различных типов счетчиков, что упрощает проверку их работоспособности во время периодической поверки. Полученные результаты отвечают задачам, поставленным в «Энергетической стратегии России на период до 2030 года» (№ 1715-р от 13.10. 2009), и предназначаются для использования при модернизации систем газопотребления и учета малых расходов энергоносителя. Проведенные исследования предполагают адаптацию базовых методик оценки надежности, рисков и безопасности систем в теории газоснабжения и регулирования учета расхода газа, используемых для работы региональными предприятиями газовой отрасли. Statement of the problem. It is required to improve the algorithm of the program “Control of Energy Resources: KEP 1-Gas” designed to quickly calculate the maximum permissible error of measurement by the gas meter in relative units (%) and in absolute value (m/h) at the current set gas flow rate for various types of meters. Results. The major issues of programming physical processes for measuring low gas flow rates are investigated. A description of the program for measuring low gas flow rates is shown. A software package and an operation algorithm “Energy Resources Control: KER2-Main” have been developed which automate the calculation of the maximum permissible measurement error by the gas meter in relative units (%) and in absolute value (m/h) at the current specified gas flow rate, diameter, pressure for various types of counters considering the linear velocity of particles in the gas flow. Conclusions. For the first time, the EMV software “Energy Resources Control: KER 2-Main” has been developed which is designed to quickly calculate the maximum permissible measurement error of the gas meter in relative units (%) and in absolute value (m/h) for the current specified gas flow rate, pipeline diameter, pressure for various types of meters, which makes it easier to check their performance during periodic verification. The results obtained are in compliance with the objectives specified in “Energy Strategy of Russia for the Period Up to 2030” (No. 1715-r from October 13, 2009) and are intended for use in the modernization of gas consumption systems and accounting for low energy costs. The studies assume the adaptation of the basic methods for assessing the reliability, risks and safety of systems in the theory of gas supply and regulation of gas consumption metering used for the operation of regional enterprises of the gas industry. Statement of the problem. It is required to improve the algorithm of the program “Control of Energy Resources: KEP 1-Gas” designed to quickly calculate the maximum permissible error of measurement by the gas meter in relative units (%) and in absolute value (m3/h) at the current set gas flow rate for various types of meters. Results. The major issues of programming physical processes for measuring low gas flow rates are investigated. A description of the program for measuring low gas flow rates is shown. A software package and an operation algorithm “Energy Resources Control: KER2-Main” have been developed which automate the calculation of the maximum permissible measurement error by the gas meter in relative units (%) and in absolute value (m3/h) at the current specified gas flow rate, diameter, pressure for various types of counters considering the linear velocity of particles in the gas flow. Conclusions. For the first time, the EMV software “Energy Resources Control: KER 2-Main” has been developed which is designed to quickly calculate the maximum permissible measurement error of the gas meter in relative units (%) and in absolute value (m3/h) for the current specified gas flow rate, pipeline diameter, pressure for various types of meters, which makes it easier to check their performance during periodic verification. The results obtained are in compliance with the objectives specified in “Energy Strategy of Russia for the Period Up to 2030” (No. 1715-r from October 13, 2009) and are intended for use in the modernization of gas consumption systems and accounting for low energy costs. The studies assume the adaptation of the basic methods for assessing the reliability, risks and safety of systems in the theory of gas supply and regulation of gas consumption metering used for the operation of regional enterprises of the gas industry.

scholarly journals Study of gas consumption patterns for sheet glass enterprises

2020 ◽  
Vol 178 ◽  
pp. 01039
Author(s):  
Yauhen Shenets ◽  
Deniz Moroz ◽  
Nadzeya Hruntovich ◽  
Mikhail Malashanka ◽  
Alexei Tsvetkov
Keyword(s):  
Construction Industry ◽  
Sheet Glass ◽  
Gas Flow ◽  
Factor Model ◽  
Glass Production ◽  
Heating System ◽  
Furnace Lining ◽  
Factors Affecting ◽  
Gas Consumption ◽  
Gas Supply

A study of the gas consumption modes of the subgroup “Enterprises of construction industry and architecture” of the regional gas supply system, as well as the production of sheet glass, which forms gas consumption in the subgroup by 94%, was carried out. The field type “daily gas consumption outside temperature” is set for the subgroup and the plant for production of sheet glass. This is a field with a weak dependence on the growth of daily gas consumption when outside temperature decreases and without an obvious stratification into temperature regions determined by the state of the heating system (“on” or “off”) and a significant vertical spread of daily gas flow at the same values of outside temperature. Additional factors affecting gas consumption were searched. The created database of 14 technological indicators over a seven-year period allowed to identify factors forming daily and annual gas consumption regimes using correlation-regression analysis. The importance of the “time worked by the line” factor and its contribution to the formation of the annual volume of gas consumption was assessed. Invention proposes a simplified method of estimating the rate of aging of furnace lining and wear of enclosing structures on the basis of a single-factor model of gas consumption from productivity by comparing the daily average annual values of specific gas consumption for sheet glass production with the same volume of output.

scholarly journals OPTIMIZATION OF DIFFERENTIAL PRESSURE DISTRIBUTION BETWEEN GAS SUPPLY SYSTEM SECTIONS

2020 ◽  
Vol 22 (6) ◽  
pp. 141-153
Author(s):  
O. N. Medvedeva ◽  
N. S. Bessonova
Keyword(s):  
Pressure Distribution ◽  
Pressure Loss ◽  
Distribution Systems ◽  
Gas Flow ◽  
Unit Length ◽  
Supply System ◽  
Differential Pressure ◽  
Strategic Factors ◽  
Supply Systems ◽  
Gas Supply

The paper proposes the optimum distribution of the differential pressure between gas supply system sections and gas consumption, depending on the settlement planning and development. This provides a 10–15 % reduction in metal and material consumption of gas supply systems and a 4–5 % cost reduction. The hydraulic analysis of differential pressure distribution does not allow to purposefully distribute the calculated pressure drop. The pipeline diameter is usually selected according to the estimated gas flow rate and specific pressure loss per unit length of gas supply system sections. Then, in accordance with the State standard, the condition of compliance and non-exceedance of the obtained differential pressure is checked with the standard value. If this condition is not met, the pipeline diameter is adjusted for design reasons.This work conducts additional research into the differential pressure distribution between gas supply system sections. Materials and methods include the assessment methodology for the effectiveness of differential pressure distribution between gas supply system sections.Although many publications are devoted to the optimization of gas pressure distribution systems, the proposed solutions and the recommendations developed in this paper are fragmentary, often contradictory, since they do not consider the completeness and diversity of strategic factors.The paper shows that the pressure loss values obtained for domestic gas-based units with a reduced nominal pressure, are much less than those given in regulatory documents. According to the analysis, the settlement development, population density in gas-supplied territories, and technical conditions of gas-supplied buildings, have a decisive influence on the unit costs of gas supply systems.

SCIENTIFIC AND ENGINEERING PRINCIPLES OF EFFICIENT FUEL USE AND ENVIRONMENTALLY FRIENDLY GAS COMBUSTION IN STOVE PLATES. PART 1. MODERN STATE-OF-THE-ART AND DIRECTIONS FOR IMPROVEMENT THE GAS BURNING IN DOMESTIC GAS COOKERS

2017 ◽  
pp. 3-18 ◽  
Author(s):  
B.S. Soroka ◽  
V.V. Horupa
Keyword(s):  
Natural Gas ◽  
Flow Rate ◽  
Gas Flow ◽  
Renewable Energy Sources ◽  
Combustion Process ◽  
Orifice Diameter ◽  
Firing Process ◽  
Gas Flow Rate ◽  
Gas Combustion ◽  
Gas Stoves

Natural gas NG consumption in industry and energy of Ukraine, in recent years falls down as a result of the crisis in the country’s economy, to a certain extent due to the introduction of renewable energy sources along with alternative technologies, while in the utility sector the consumption of fuel gas flow rate enhancing because of an increase the number of consumers. The natural gas is mostly using by domestic purpose for heating of premises and for cooking. These items of the gas utilization in Ukraine are already exceeding the NG consumption in industry. Cooking is proceeding directly in the living quarters, those usually do not meet the requirements of the Ukrainian norms DBN for the ventilation procedures. NG use in household gas stoves is of great importance from the standpoint of controlling the emissions of harmful components of combustion products along with maintenance the satisfactory energy efficiency characteristics of NG using. The main environment pollutants when burning the natural gas in gas stoves are including the nitrogen oxides NOx (to a greater extent — highly toxic NO2 component), carbon oxide CO, formaldehyde CH2O as well as hydrocarbons (unburned UHC and polyaromatic PAH). An overview of environmental documents to control CO and NOx emissions in comparison with the proper norms by USA, EU, Russian Federation, Australia and China, has been completed. The modern designs of the burners for gas stoves are considered along with defining the main characteristics: heat power, the natural gas flow rate, diameter of gas orifice, diameter and spacing the firing openings and other parameters. The modern physical and chemical principles of gas combustion by means of atmospheric ejection burners of gas cookers have been analyzed from the standpoints of combustion process stabilization and of ensuring the stability of flares. Among the factors of the firing process destabilization within the framework of analysis above mentioned, the following forms of unstable combustion/flame unstabilities have been considered: flashback, blow out or flame lifting, and the appearance of flame yellow tips. Bibl. 37, Fig. 11, Tab. 7.

Sign in / Sign up

Export Citation Format

Share Document