Journal of Siberian Federal University: Engineering & Technologies最新文献

{"title":"Use of Mixed Fuel Based on Brown Coal and its Thermal Processing Products in Energy Boilers","authors":"A. V. Zhuikov, A. Matiushenko, D. Loginov, A. Zhizhaev, P. N. Kuznetsov, Lyudmila S. Tarasova, G. R. Mongush","doi":"10.17516/1999-494X-0291","DOIUrl":"https://doi.org/10.17516/1999-494X-0291","url":null,"abstract":"The work investigated the thermal behavior of Borodino coal, brown coal coke and mixed fuel, consisting of 80 % Borodino brown coal and 20 % brown coal coke during the combustion process using thermogravimetric analysis. The chemical composition of the samples is presented. When analyzing the TG-DTG curves, combustion characteristics were determined, such as: ignition temperature (Ti) and coke burnout temperature (Te), flammability index, integral combustion parameter. To determine Ti and Te, the technique of crossing the TG and DTG curves was applied and justified. An electron microscopic study of the cross-section of a lignite coke particle has been carried out. The results of the study showed that the addition of lignite coke to brown coal has a positive effect on its combustion characteristics","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"9 1","pages":"106-117"},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85125881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk-Based Models of Equipment Repair Management in Power Supply Systems with a Mono Consumer","authors":"Y. Sekretarev, V. Levin","doi":"10.17516/1999-494X-0295","DOIUrl":"https://doi.org/10.17516/1999-494X-0295","url":null,"abstract":"An adequate description of reliability in decision-making models for managing the restoration of its properties is a complex scientific task. Quite a lot of attention has been paid to the correct solution of this problem in various fields of technology. The article proposes and implements a probabilistic approach to calculating the circuit reliability of the power supply system using an assessment of the actual state of its main elements. The assessment of the state of the equipment of the power supply system is carried out using an integral indicator of the technical condition. This creates the basis for applying a risk-based approach to the management of maintenance and repairs to assess the consequences and feasibility of repair and restoration work of power equipment while minimizing possible damage from power outages to consumers. The article presents two methods for calculating reliability, focused on both recoverable and non-recoverable elements of the power supply system. In addition, a decision-making model for managing repairs of power equipment in power supply systems is proposed. A separate case is considered when the power supply system provides electricity to a mono-consumer, which is typical for oil and gas production. Based on the analysis of scenarios for the implementation of the risk-based approach, the influence of various degrees of severity of the consequences of failure on the assessment of decisions made is studied. The developed models and methods are illustrated by computational examples from the practice of operating electrical equipment in power supply systems with a monoconsumer","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"33 1","pages":"17-32"},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90811134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the Perspective of Transfer of Omsk Thermal Power Plants to Combustion of Fired Coals","authors":"Ainur A. Kuandykova, V. Lebedev","doi":"10.17516/1999-494x-0292","DOIUrl":"https://doi.org/10.17516/1999-494x-0292","url":null,"abstract":"The existing issues during the combustion of Kazakh coal from the Ekibastuz basin in the Omsk energy system are noted. The environmental problems of coal generation in Omsk are outlined. The possibility of transferring the Omsk coal-fired thermal power plants to the combustion of domestic coals is considered. The options for increasing the efficiency of using solid fossil fuel in the production of electric and thermal energy are given. The existing problem of storing ash and slag wastes obtained by burning high-ash Ekibastuz coals is noted. The transfer of the Omsk CHPPs to the combustion of brown coal from the Kansk-Achinsky deposit, provided that highly effective environmentally friendly technologies are used It is noted that the technology of combustion of fuels in a circulating fluidized bed (CFB) has been industrially developed and implemented in power boilers. The results of operation of the first in Russia CFB boiler of unit No. 9 with a capacity of 330 MW at the Novocherkasskaya SDPP are presented","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90219121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling the Heat Scheme of the Combined Heat and Power Plants Using the Software Product “Boiler Designer”","authors":"K. Shtym, Y. B. Goncharenko, T. Soloveva, D. Bibikov, P. Vasilyev","doi":"10.17516/1999-494X-0293","DOIUrl":"https://doi.org/10.17516/1999-494X-0293","url":null,"abstract":"This article describes the rationale for the development of a mathematical model of the thermal scheme of Vladivostok thermal power plant. Four types of turbines are installed at this plant, boiler units operate on coal and natural gas. This makes it difficult to effective load distribution between the turbine units. Application of simplified dependencies, built on the basis of the reporting data, allows to analyse the correctness of the load distribution between the units. The article provides an example of comparing the actual parameters of the plant and calculating based on the simplified characteristics of turbines. This example showing the loss of fuel equivalent from non-optimal load distribution. However, the use of such simplified characteristics has several shortcomings. These shortcomings do not allow using this as a universal method. There is a need to create a full-fledged mathematical model of thermal power plants. The model is developing on the basis of the Boiler Designer software package. The program has a modular structure and allows you to create mathematical models of each unit of equipment, and then, through the purpose of connections, assemble the thermal scheme of the station. This approach is actual for cross-linked heat and power plants, since it allows us to evaluate the efficiency of thermal scheme connections, and not just the operation of the equipment itself. The article provides a simplified model of the station, its advantages and disadvantages","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"9 1","pages":"130-139"},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81828125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Control of a Wind Power Plant with a Synchronous Permanent Magnet Generator and a Magnetic Variator","authors":"A. Achitaev, Konstantin A. Barkhatov, S. N. Udalov","doi":"10.17516/1999-494X-0289","DOIUrl":"https://doi.org/10.17516/1999-494X-0289","url":null,"abstract":"Currently, the use of wind power plants with magnetic speed reduction is beginning to develop in the world literature. Features of the application of these systems in combination with a wind power plant allows you to solve the issue of its interface with the electric power system. The controlled flexible connection between the turbine and the generator makes it possible to coordinate the control of the load angle of the synchronous generator. In this paper, we consider a developed controller that provides integrated control of a wind turbine with a magnetic variator with a variable pitch of the blade angle and a variable speed of rotation of the wind turbine. A promising direction for the construction of wind power systems is currently the use of electromagnetic variators as part of wind power plants. This work is devoted to the study of electric power systems that include wind turbines with electromagnetic variators. The variator is built between the wind turbine and the generator, instead of a mechanical gearbox. The high-speed change in the torque of the electromagnetic variator allows you to keep the speed of the generator. Due to the inherent non-linearity of the wind turbine and CVT, a set of operational and emergency modes was defined and then the controller was designed for each operating point. In addition, the aerodynamic torque and effective wind speed are estimated online and a planned variable schedule for the controller implementation is obtained. Was tested by simulating with MATLAB/Simulink","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"20 7","pages":"72-96"},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91420133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Study of Temperature Distribution in a Cyclone-Vortex Furnace","authors":"A. V. Kulik, Evgenij Iu. Dorogov, T. Soloveva, K. Shtym","doi":"10.17516/1999-494X-0294","DOIUrl":"https://doi.org/10.17516/1999-494X-0294","url":null,"abstract":"This article describes the experience and results of experimental study of the temperature distribution in the refractory lining of the gas and liquid fuel cyclone-vortex furnace (CVF). Temperatures were measured with type K thermocouples. Most of the thermocouples are located a depth of 25 mm from the surface combustion chamber. With increasing boiler load observed decrease in temperature and increase of plating unevenness of the temperature distribution in the combustion chamber. This is due to the redistribution of heat generated between the combustion chamber and the firebox as the load increases. The results of heat transfer studies in CVF will lead to a reduction in the thickness of the lining, modernization of the CVF structure. In the future, abandon the use of refractory lining in CVF","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"146 3 1","pages":"140-145"},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91120303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Load Flow and Transient Stability Analyses for an Integrated Solar Combined Cycle Station in Iraqi Southern by Using ETAP","authors":"A. Z. Abass, D. Pavlyuchenko, A. Prokopov, Saadallah Hussain Zozan","doi":"10.17516/1999-494X-0285","DOIUrl":"https://doi.org/10.17516/1999-494X-0285","url":null,"abstract":"Analyses of a power system are important for designing and operating phase execution monitoring and to ensure reliable grid operations by sufficient protection projects settings. In this paper, electrical model of a 340 MW integrated solar combined cycle (ISCC) located in the south of Iraq, is developed by Electrical Transient Analyzer Program (ETAP) and load flow, voltage stability and short circuit analyses are performed. Impact of power grid voltage instability on system buses of the power plant is estimated. Using load flow analysis that use Newton-Raphson algorithm, buses operating at under voltage due to power grid voltage instability are specified and their voltages are improved according to given voltage limitation that are based on buses criticality with regard to loads. On-load tap changers and reactive power compensation are used to improve steady state voltage stability. Optimal position for capacitor banks placement and number of capacitor banks are proposed by using optimal capacitor placement module of ETAP. The use of modern technology and advance planning have a big impact on reducing losses. The article shows that the lack of planning is one of the main causes of energy losses. The parameters of the module also indicate the voltage limits, bus voltage and ratings of available capacitor banks. The voltage limit is set at 95% ≤ V ≤ 110%, and it is global for all buses","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"49 1 1","pages":"5-16"},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83844450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solar Parabolocilindrical Installations, Constructive Features and Calculation of Individual Parameters","authors":"S. F. Ergashev, U. Nigmatov","doi":"10.17516/1999-494X-0286","DOIUrl":"https://doi.org/10.17516/1999-494X-0286","url":null,"abstract":"The article gives a brief description of a solar parabolic-cylindrical installation and its main element, an optical concentrator. The analysis is based on the most simplified and sufficiently accurate methodology for calculating the coefficient of geometric concentration of parabolic-cylindrical mirrors. The cases of an ideal parabolic-cylindrical concentrator having a small aperture are considered. A variant of calculating the concentration coefficient of a parabolic cylindrical concentrator for cylindrical and flat receivers is presented. :","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"2016 1","pages":"33-41"},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86138393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Model of Reliability Optimization of a Stand-Alone Electric Power System with Constraints on Dynamic Stability of the Wind Turbine","authors":"Sergej M. Perzhabinsky, D. Karamov, A. Achitaev","doi":"10.17516/1999-494X-0288","DOIUrl":"https://doi.org/10.17516/1999-494X-0288","url":null,"abstract":"The relevance of the study is due to the development herein of a model for reliability optimization of stand-alone power systems with wind turbines and electrochemical power storage devices, with special emphasis within this model put on the specifics of power equipment operation. The key feature of the model developed is that it enables us to factor in the requirements to be met by the equipment as arising from the considerations of dynamic stability of the stand-alone system. When simulating battery storage operating modes, the charge-discharge limits as well as the remaining charge in the storage are taken into account. Thus, the reduction of the total number of considered mixes of the equipment being commissioned is achieved, the computational efficiency of the reliability optimization method is increased, while the validity of modeling results is improved. Development of methods for optimization of reliability of stand-alone electric power systems with wind turbine installations and electrochemical power storage devices while meeting requirements for electrodynamic stability. A stand-alone power system that is assumed to be located in the coastal area of Lake Baikal in the Kabansky State Nature Reserve, Republic of Buryatia, Russia, serves as the object of the study. Calculations are based on multiple simulation of modes of operation of the electric power system by means of the Monte Carlo method. The values of random variables are modeled as per specified laws of distribution and fault rate indicators of power equipment. Modeling of power generation at wind turbines is based on a detailed analysis of real-life weather data (average hourly wind speed, air density and humidity). The method of reliability optimization of stand-alone power systems with wind turbines and electrochemical energy storage devices was developed so as to take into account the requirements to be met by electric power equipment in terms of dynamic stability. The optimization criterion is the minimum expected value of the cost of produced electricity. Power redundanct and energy storage devices are used as means of reliability assurance. The results of calculations attest to the fact that for the natural and climatic zone under consideration, the use of vertical axis wind turbines in a stand-alone power system proves more efficient than the use of horizontal axis wind turbines","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"111 1","pages":"55-71"},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80630392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Approach to Analysis of the Properties of Disordered Structures in Hydrodynamic Acoustics as Supplement to Technology and Detection Theory","authors":"P. A. Starodubtsev, Evgeny P. Starodubtsev, Roman N. Alifanov, G. Dorofeev","doi":"10.17516/1999-494x-0310","DOIUrl":"https://doi.org/10.17516/1999-494x-0310","url":null,"abstract":"The article presents the results of the analysis of the properties of disordered structures in hydrodynamic acoustics, associated with the process of detecting physical phenomena and marine objects based on the results of their mechanical impact on the marine environment, in which acoustic vibrations propagate. If vortices, attractors, fractals arise as a result of complex interactions of forces of nature (upwellings, seiches, Coriolis forces, currents, convection flows, rotation of the Earth) and are essentially mechanical effects on the environment of formation and propagation of an acoustic field, then mechanical sources of sound introduced into the hydrosphere (water) should repeat fractal iterations on a smaller scale at the sound field level. Recognizing the equations of hydrodynamics (the equation of motion, the equation of continuity, and the equation of state) as the fundamental equations of hydroacoustics, the nonlinearity of these equations is proposed to be considered the theory of the hydroacoustic field as nonlinear, and the linearity of the processes in this study is considered a special case. The principle of superposition also becomes a special case, and the Fourier transform, remaining necessary, loses its sufficiency. Fractal analysis in combination with wavelet analysis should be involved to help him","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83634098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}