Development Of Supply Systems Research Articles

Development of a Genetic Algorithm Optimization Model for Biogas Power Electrical Generation

Biogas power generation is renewable energy made from biological materials. Biogas power production is technology which helps in development of sustainable energy supply systems. This paper develops Genetic Algorithm optimization model for Biogas electrical power generation of Ilora in Oyo, Oyo state. The production is done using co-digestion system of pig dung and Poultry dung under the process of anaerobic digestion. The pig dung and poultry dung were mixed 50:50%. MATLAB and VISUAL BASIC Software was used to carry out simulations to develop optimized Genetic Algorithm model for Biogas power production with aims to improving electricity accessibility and durability of the community. The results of the research reveal the Empirical Biogas power production without and with Genetic Algorithm optimization. The Result showed that biogas electrical power generated without and with Genetic Algorithm Optimization were 5KW and 11.18KW respectively. The biogas power generation was increased by 6.18KW, which is 38.2% increase after Genetic Algorithm optimization. The results show the application of the Genetic Algorithm optimization model which can be used to improving Biogas power generation when amount of methane gas produced from the animal dung varies with speed of thermal rotating shaft.

Analysis of the energy policy establishment: the case of East Asia

The energy infrastructure is a complex and evolving technical system, vital for the very existence of modern civilization. The example of Japan highlighted the main actors and considered the basic mechanisms of energy policy as an institution for the development of energy supply systems at the national and sub-national levels. The knowledge of such institution is important for monetizing Russia’s energy resources, considering East Asia as leading energy import market. The article analyse energy policy formation on the example of Japan as economy with the most mature energy institutions among other East Asian economies, and implications to the prospective energy export from the Russian Federation.

Features of Estimation of Structural Reliability of Power Supply Systems

Development and operation of modern power supply systems of consumers which are the part of distributed generation (DG) systems with their communication with electric power system (EPS) and renewable energy sources (RES) demand changes in estimation of their reliability indicators on the basis of corresponding mathematical apparatus. It is shown that DG systems refer to structures with several overlapping zones of action, which determines their peculiarities, which are represented by some integral characteristic - efficiency of operation, which characterizes the degree of expediency of use of the DG system in different modes. The approach based on evaluation of effectiveness of such systems is offered. Examples of calculation of relatively simple structures of DG systems performing several tasks simultaneously are given.

The analysis of international experience in the energy market formation and economic mechanisms for management of the gas supply systems

The article assesses the foreign countries experience in formation of the energy market and the basics of managing the development of gas supply systems. The creation of a system in order to provide access to gas transport services for gas consumers, gas producers and its suppliers, as well as the creation of favorable conditions for investment is a significant stage in the implementation of effective market transformations. One of the fundamental points for carrying out the reforms in gas industry in the market conditions should be the arrangement of trade system for reserved capacities. The positive results of the reform include: reduction or stabilization of prices for end-users, diversification of gas supply sources, improvement of the gas supply reliability.

Decision Making Support for Selecting Structure of Generating Capacities at Development of Local Power Supply Systems

This paper considers the problem of multi-criteria option selection for the purpose of developing generating capacities for local power supply systems. The authors suggest a 2-stage method of multi-criteria analysis. At the 1st stage one conducts a multi-criteria selection of the most prospective power generation technology. At the 2nd stage one conducts a multi-criteria assessment of options for power station capacity ratio on the basis of the selected efficient technology of power generation. At the first stage the authors suggest a modified method of hierarchy analysis allowing for the decrease in the number of requests to a decision-maker (DM). At the second stage the authors use the modified method TOPSIS with the application of value functions for calculating non-linear change of the DM preferences in relation to the assessment of options by the criteria.

Problems of energy efficiency of heat supply systems

The main task of energy-efficient heat supply is to ensure full compliance between the produced and consumed thermal power, subject to a minimum of reduced costs. To achieve this goal, various methods of central and local regulation are applied. Analysis of the thermal schemes of some cities in Russia showed that most of the heat sources of centralized heat supply systems are not able to support the design hightemperature graphs with central regulation. Therefore, the area of centralized qualitative method of regulation of heat load has decreased substantially. A perspective direction for the further development of heat supply systems is to appeal to the experience of foreign countries, i.e. the use of qualitative-quantitative and quantitative methods of central regulation and low-temperature heat supply. There is also an acute problem of the complete use of heat by consumers, since overstating of the temperature of the return water substantially reduces the efficiency of heat sources. A new formula has been obtained which makes it possible to predict the temperature of the return network water in variable operating modes of heating points. The resulting formula can be used to set up programmable regulators and will allow correcting irrational modes of operation of heat supply systems.

Экономический механизм управления развитием систем газоснабжения регионов Российской Федерации

Экономический механизм управления развитием систем газоснабжения регионов Российской Федерации

Impact of gas supply system development scenarios on natural gas demand in the Baikal region

The paper presents a methodology and results of studies on assessment of natural gas demand, its competitive price, gas cost and potential gas demand for different scenarios of gas supply system development in the Baikal region. The options of gas pipeline systems of different capacities from the Kovykta gas-condensate field and the non-pipeline gas supply systems are focused on.

Informacionno-analiticheskaja tehnologija optimalnogo upravlenija ustojchivym razvitiem i funkcionirovaniem sistem vodosnabzhenija

Informacionno-analiticheskaja tehnologija optimalnogo upravlenija ustojchivym razvitiem i funkcionirovaniem sistem vodosnabzhenija

ИНФОРМАЦИОННО-ВЫЧИСЛИТЕЛЬНЫЙ КОМПЛЕКС «АНГАРА-ТС» ДЛЯ АВТОМАТИЗАЦИИ РАСЧЕТА И АНАЛИЗА ЭКСПЛУАТАЦИОННЫХ РЕЖИМОВ ПРИ УПРАВЛЕНИИ КРУПНЫМИ МНОГОКОНТУРНЫМИ СИСТЕМАМИ ТЕПЛОСНАБЖЕНИЯ

Development of a software package for calculating and operation analyzing of large district heating systems under state control. Theory of hydraulic circuits. Graph the ory. System research in energy. Multilevel modeling. The method of nodal pressures for the calculation of hydraulic conditions. Computational Mathematics. Linear Algebra. Methods of non-linear programming. Information Technology. The analysis of the directions of centralized heat supply systems (HSS) development in Russia and in a number of countries of northern Europe is made. Types of HSS operation conditions are classified, as well as goals and tasks of their calculation at different stages of control. Adaptation of the mathematical model for the solution of the adjustment calculation problem and thermal-hydraulic conditions analysis and the features of its implementation are proposed. The functions and properties of the developed information and computing complex "ANGARA-HS" are described and its differences from analogues are analyzed. The questions of the relevance of the construction of multi-level computer models of hierarchical structure HSS for the problems of calculating conditions are examined. Possibilities of graphical analysis of a priori information and calculation results by means of the developed tool are explored. Automation of control, increase of reliability, economy and quality of HSS operation require the introduction of modern mathematical modeling methods and information technologies. Calculation of thermal-hydraulic condition is a necessary element for assessing the feasibility of decisions taken at all stages of control. An information and computer complex "ANGARA-HS" of the fourth generation was developed to solve traditional and new problems from the analysis and control of large HSS conditions.

Conceptual design of water supply systems based on low-power nuclear desalination complex

The concept of environmentally friendly and energy-efficient water supply systems development on the basis of a desalination complex is considered to solve the problem of water deficiency, reduce the ecological load on the environment and provide fresh water to regions in which a lack of fresh water is found out. In the paper, a brand-new hybrid scheme of the water supply system is proposed, with the production of water containing reduced deuterium, based on desalination technology and recirculated water supply (recycling) with the help of membrane and distillation methods, as well as improved pretreatment and water purification technology.

COMBINED MOBILE POWER SYSTEM FOR THE STANDBY POWER SUPPLY OF THE LOW AND AVERAGE ELECTRICAL FACILITIES

Purpose. The objective of research is to develop a version of combined mobile system of the main and backup power supply based on renewable and traditional energy sources for low-power consumers in regions distant from the main electricity grid; to describe the design of the proposed system; to develop a block diagram of the control and management algorithm for the system elements aimed at achieving more efficient energy supply to consumers in case of further implementation of the system,.Methodology. To attain the research objective, the following methods have been employed: the method of analytical processing of the reviewed materials on current state of alternative energetics, on problems related to energy supply for low-power remote consumers, and on ways of solving the problems identified by means of simulating potential uninterruptible power systems; the method of system analysis of complex estimation based on modern computer technologies as for the combined mobile system of the main and backup power supply potential.The results obtained. The expediency of development and further improvement of such combined power supply systems intended for low-power consumers with the purpose of providing the energy balance in the Dnipro region (Ukraine) has been revealed and proved. A version of the combined system based on traditional and renewable sources of power is proposed and described. The block diagram of the combined system controller algorithm is developed. The mechanism of action of the presented algorithm is determined, as well as the graphical dependences of the power factor on the speed of the wind turbine CP=f(Z), and of mechanical torque of the wind turbine on the coefficient of its speed M=f(Z) are obtained and analyzed. The results of calculation as for electric power generated by potential wind power plant W, [kWh] during the year are presented.Scientific novelty consists in the proposed block diagram of the control and management algorithm as regards the combined backup power supply system, that allows wind turbine engines and diesel units to alternately operate on a single generating unit.The practical value of study is further development of the system which provides guaranteed uninterruptible energy supply and distribution of electric energy intended for low-power energy consumers to satisfy their needs; increasing the efficiency, flexibility and reliability of the system and, ultimately, reducing the energy dependence of the country on the import of traditional fossil energy resources, the conversion of which leads to negative consequences for the country's ecology. The implementation of the proposed block diagram of the control and management algorithm will reduce the cost of the system and the cost of its maintenance, for example, current repairs, etc.

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

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.

Considerations on Drinking Water Management in the Moldavian Plateau and Plain Region

Abstract The Moldavian Plateau and Plain have few drinking water sources (the case of Iaşi and Vaslui Counties). The main type of fresh water sources are groundwater and surface water. The Moldavian Plateau rural settlements are affected the most by the lack of viable, unpolluted water sources to ensure a volume able to cover the consumers’ demand. The pollution phenomenon induced by the non-availability of rural sewerage systems and also by the settlements’ areas foundation rocks have decreased the groundwater and surface water sources quality parameters. The adduction, transport and distribution networks of water supply systems are affected by the „water loss“ phenomenon. Water management in a transmission and distribution network must correlate the number of water sources, available volume, acceptable quality parameters and inherent water losses from networks with the consumers’ demands. The optimisation of water management in a given geographic space has led to the establishment of „regional water supply systems“. This process relies on the minimisation of water losses. The case study carried out in Iaşi County shows the importance of the regional water supply system development through optimal exploitation of Moldavian Plateau and Plain water sources.

Methane, kerosene and hydrogen comparative as a rocket fuel for launch vehicle pneumohydraulic supply system development

Methane, kerosene and hydrogen comparative as a rocket fuel for launch vehicle pneumohydraulic supply system development

ВИЗНАЧЕННЯ ЕКОНОМІЧНОЇ ЕФЕКТИВНОСТІ ВИКОРИСТАННЯ СОНЯЧНОЇ ЕНЕРГІЇ НА ДАХАХ ТОРГОВЕЛЬНО-РОЗВАЖАЛЬНИХ ЦЕНТРІВ

In Ukraine, the annual flow of solar radiation is on par with the countries that are actively using solar collectors today (Sweden, Germany, USA, etc.). The entire territory of Ukraine is suitable for the development of heat supply systems with the use of solar energy. The most promising regions of the country for the development of solar een-ruget is the Crimean peninsula and steppe Ukraine Generation of electricity allows solving current energy saving issues. The roofs of shopping and entertainment centers, supermarkets, industrial premises, logistical complexes, railway stations, airports and other objects have a fairly large area, so they can be effectively used as a site for the installation of power plants on solar photovoltaic modules. For the variant comparison two variants of modules, the first FER EnerGenie EG-SP-M300W-33V9A with the capacity of 300 W are selected. the second FEM Risen RSM72-6-330P TR1 with a power of 330 W. The constructive scheme of using the area of the shopping center in the city of Irpin is proposed. The calculation of photovoltaic modules and the economic potential of a solar power station have been carried out. Estimated generation of the station is given during the year. The electricity produced by the photovoltaic station is economically profitable to sell to the state at a green tariff. When designing a solar power station in the city of Irpin, one of the most important indicators, the angle of inclination of the modules is taken into account, which is established by a detailed analysis of the intensity of solar radiation during the year. The analysis and calculations of the given data shows that the development of a set of constructive measures for the installation of SES of two variants on the roof of the shopping and entertainment center will enable to effectively use the roof area and it is economically advantageous to sell electricity to the general network under the "green" tariff, which will enable to pay SES (375 kW ) in the period up to 4,5 years, and SES (412 kW) in the period up to 3,2 years.

Выбор предпочтительного решения по развитию электрических сетей на основе нейросетевых технологий

The decision on the development of electrical supply systems is based on the analysis of a large amount of information, comparison of multiple options, and the evaluation of the solution long-term impact. This complicates the selection process for the alternative to the development of the electrical network (ADEN). Thus an automated decision support system, facilitating the determination of the preferred ADEN, is required. The article presents the selection procedure for the mathematical apparatus to solve the specified task, and substantiates its characteristics. It is suggested to use the technology of artificial neural networks (ANN), based on the developed multi-criteria system for estimating ARES, which allows ranking the alternatives based on the degree of their preference. The architecture of the ANN, the algorithm for optimizing weights, and their efficiency at various parameters are substantiated. The F-measure and the percentage of correctly accepted decisions were selected as efficiency indicators. They amounted to 0.9794 and 97.83 %, respectively, for optimal network parameters. The received INS was successfully tested in the software package.

Regression model for heat consumption monitoring and forecasting

Heat supply is socially and economically important in our country. In this regard, high-quality monitoring and planning of the development of heat supply systems are a strategic vector of scientific research. This paper is focused on the studies demonstrating how to choose a methodological approach to describe changes in heat consumption in the retrospective. The change in heat consumption is described using multiple regression models. In the first part of the paper, the parameters for the regression model are determined and a statistical analysis of the obtained model is performed. In the second part of the paper, to eliminate the multicollinearity of the regression equation, the number of dependent variables in the model is reduced. A statistical analysis of the new regression model and the exponential regression model are carried out. The heat consumption values obtained using these models are compared with the statistical data. The conclusions about the quality of the obtained regression models are made. In the third part of the article, we make a forecast of heat consumption in the medium term by using a linear regression model and an exponential model.

Prospects for development of heat supply systems in high-rise districts

The article analyzes the main advantages and disadvantages of centralized and decentralized heat supply systems in high-rise districts. The main schemes of centralized heat supply systems are considered. They include centralized heat supply from boiler houses, centralized heat supply from autonomous heat sources, heat supply from roof boiler houses and door-to-door heating supply. For each of these variant, the gas distribution systems are considered and analyzed. These systems vary depending on the heat source location. For each of these systems, technical and economic indicators are taken into account, the analysis of which allows choosing the best option for districts where high-rise buildings predominate.

Planning of heat supply of territories: model and algorithms

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.