The work is devoted to considering the possibility of using the Fourier law and the data of tribological tests for the approximate determination of the thermophysical characteristics of the sheet metal-fluoroplastic material on a steel substrate. The thermal conductivity coefficient of two different fluoroplastic materials was determined by tribological method using the temperature difference in the friction zone. It was shown that friction conditions change from viscoelastic to plastic
{"title":"Thermal Conducting Properties of Metal-fluoroplastic Material Determined by Tribological Method","authors":"V. N. Kornopoltsev, B. Damdinov","doi":"10.17516/1999-494x-0318","DOIUrl":"https://doi.org/10.17516/1999-494x-0318","url":null,"abstract":"The work is devoted to considering the possibility of using the Fourier law and the data of tribological tests for the approximate determination of the thermophysical characteristics of the sheet metal-fluoroplastic material on a steel substrate. The thermal conductivity coefficient of two different fluoroplastic materials was determined by tribological method using the temperature difference in the friction zone. It was shown that friction conditions change from viscoelastic to plastic","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"85 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87575980","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}
The article discusses the power supply system of an industrial enterprise, which included a turbine generator plant operating on the basis of a synchronous generator equipped with predictive voltage and rotor speed controllers, as well as a high-power electric energy storage device. A description of the models of this plant, predictive controllers and energy storage, as well as the results of modeling when the system goes into an isolated mode of operation are given. Simulation was performed in MATLAB environment using Simulink and SimPowerSystems packages. The purpose of the work was to study the behavior of the proposed predictive controllers during the transition of the power supply system to the island (isolated) mode. Based on the results of computer simulation, it was concluded that the use of predictive controllers improves the damping properties of the system. The use of an energy storage device that is automatically connected to the network when the voltage drops, allows to reduce the overvoltage at the terminals of the generator during its unloading, as well as to reduce the required mechanical power on the turbine shaft in comparison with a permanently connected device. Predictive controllers can be recommended to increase the stability of distributed generation plants when switching to an isolated mode. It is advisable to conduct further research in the direction of creating algorithms for coordinated operation of controllers
{"title":"Research of Operation of Predictive Controllers of Distributed Generation Plant in Power Supply System with Energy Storage","authors":"Yu. N. Bulatov, A. Kryukov, K. Suslov","doi":"10.17516/1999-494x-0325","DOIUrl":"https://doi.org/10.17516/1999-494x-0325","url":null,"abstract":"The article discusses the power supply system of an industrial enterprise, which included a turbine generator plant operating on the basis of a synchronous generator equipped with predictive voltage and rotor speed controllers, as well as a high-power electric energy storage device. A description of the models of this plant, predictive controllers and energy storage, as well as the results of modeling when the system goes into an isolated mode of operation are given. Simulation was performed in MATLAB environment using Simulink and SimPowerSystems packages. The purpose of the work was to study the behavior of the proposed predictive controllers during the transition of the power supply system to the island (isolated) mode. Based on the results of computer simulation, it was concluded that the use of predictive controllers improves the damping properties of the system. The use of an energy storage device that is automatically connected to the network when the voltage drops, allows to reduce the overvoltage at the terminals of the generator during its unloading, as well as to reduce the required mechanical power on the turbine shaft in comparison with a permanently connected device. Predictive controllers can be recommended to increase the stability of distributed generation plants when switching to an isolated mode. It is advisable to conduct further research in the direction of creating algorithms for coordinated operation of controllers","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87494476","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}
David V. Beknazaryan, Georgij E. Kanewets, K. Strogonov
The optimal operation of high temperature reactors such as glass furnaces requires many factors to be considered. These are, for example, the duration of the campaign, operating costs, heat losses, trouble-free operation of units and many others, presented in the article. The aim of this study is to synthesize an efficiency criterion for optimizing the heat-insulating construction of a glass-melting furnace (HICGF), as well as obtaining the optimal values of the efficiency criterion for HICGF, which for the furnace under study are about 3.8 billion rubles. In the course of the study, the phenomenological heuristic-evolutionary optimization method by G. E. Kanevets (PHEOM.GEK), which has a number of advantages over other evolutionary methods. As the main generalizing criterion, taking into account the most significant production (volume, cost of the produced glass mass) and financial (costs for the construction and operation of the HICGF, the monetary equivalent of heat losses) indicators, the maximum gross income for the furnace campaign was adopted, which differs from prototypes in that it allows to take into account most fully the peculiarities of the work of the insulated side fence of the glass furnace. Using the software complex created on the basis of PHEOM.GEK complex systems for the side fence of a glass-melting furnace, the optimal set (sequence of location and thickness) of thermal insulation materials HICGF was determined, which allow maximizing the furnace campaign with minimal heat losses. The reliability of the data obtained is achieved by the correct use of the theory of heat and mass transfer and PHEOM.GEK. An efficiency criterion is proposed, which, by solving an optimization problem, made it possible to determine the optimal HICGF. The solution of the optimization problem in conjunction with the calculation of the duration of the furnace campaign makes it possible to form recommendations for the development of optimal HICGFs in the construction of new and cold repair of existing glass furnaces by specialized institutes and industrial companies
玻璃炉等高温反应器的优化运行需要考虑很多因素。例如，文章中介绍的活动持续时间、运行成本、热损失、机组无故障运行等。本研究的目的是综合优化玻璃熔窑(HICGF)隔热结构的效率标准，并获得HICGF效率标准的最优值，所研究的炉约为38亿卢布。在研究过程中，G. E. Kanevets (PHEOM.GEK)提出的现象学启发式进化优化方法与其他进化方法相比具有许多优点。作为主要的通用标准，考虑到最重要的生产(体积，生产玻璃质量的成本)和财务(HICGF的建设和运营成本，相当于热损失的货币)指标，采用了熔炉活动的最大总收入，这与原型不同，因为它允许最充分地考虑到玻璃炉隔热侧栅栏工作的特殊性。使用基于PHEOM创建的软件复合体。GEK复合系统用于玻璃熔窑的侧栅栏，确定了隔热材料HICGF的最佳设置(位置和厚度的顺序)，从而在最小的热损失下最大限度地提高了熔炉的使用寿命。通过正确使用传热传质理论和PHEOM.GEK，获得了可靠的数据。提出了一个效率准则，通过求解一个优化问题来确定最优的HICGF。优化问题的解决与炉期持续时间的计算相结合，可以为专业机构和工业公司在建造新玻璃炉和冷修复现有玻璃炉时开发最佳HICGFs提供建议
{"title":"Efficiency Criteria for Thermal Insulation Structures of Glass Furnaces","authors":"David V. Beknazaryan, Georgij E. Kanewets, K. Strogonov","doi":"10.17516/1999-494x-0326","DOIUrl":"https://doi.org/10.17516/1999-494x-0326","url":null,"abstract":"The optimal operation of high temperature reactors such as glass furnaces requires many factors to be considered. These are, for example, the duration of the campaign, operating costs, heat losses, trouble-free operation of units and many others, presented in the article. The aim of this study is to synthesize an efficiency criterion for optimizing the heat-insulating construction of a glass-melting furnace (HICGF), as well as obtaining the optimal values of the efficiency criterion for HICGF, which for the furnace under study are about 3.8 billion rubles. In the course of the study, the phenomenological heuristic-evolutionary optimization method by G. E. Kanevets (PHEOM.GEK), which has a number of advantages over other evolutionary methods. As the main generalizing criterion, taking into account the most significant production (volume, cost of the produced glass mass) and financial (costs for the construction and operation of the HICGF, the monetary equivalent of heat losses) indicators, the maximum gross income for the furnace campaign was adopted, which differs from prototypes in that it allows to take into account most fully the peculiarities of the work of the insulated side fence of the glass furnace. Using the software complex created on the basis of PHEOM.GEK complex systems for the side fence of a glass-melting furnace, the optimal set (sequence of location and thickness) of thermal insulation materials HICGF was determined, which allow maximizing the furnace campaign with minimal heat losses. The reliability of the data obtained is achieved by the correct use of the theory of heat and mass transfer and PHEOM.GEK. An efficiency criterion is proposed, which, by solving an optimization problem, made it possible to determine the optimal HICGF. The solution of the optimization problem in conjunction with the calculation of the duration of the furnace campaign makes it possible to form recommendations for the development of optimal HICGFs in the construction of new and cold repair of existing glass furnaces by specialized institutes and industrial companies","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78326904","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}
The results of work on increasing the efficiency of heat energy production in standard boiler units using the «TERMOKOKS-KS» technology by intensifying the energy-technological processing of coal in a fluidized bed are presented. A significant increase in productivity has been established when removing small grades from coal and subsequent drying of coal, which makes it possible to reduce the cost of the obtained heat energy. The coarsening of the particles of the obtained browncoal coke with a decrease in the moisture content of the coal was revealed, which increases its transport characteristics. The range of temperatures of stable operation of the fluidized bed has been increased, due to which the product range of the «TERMOKOKS-KS» process has been expanded. The heat and material balances of the processes of combined production of heat energy and carbon-containing products are presented
{"title":"Increasing the Efficiency of the Autothermal Processing of Coal in a Fluidized Bed","authors":"D. Loginov, S. Demenchuk, S. Islamov","doi":"10.17516/1999-494x-0321","DOIUrl":"https://doi.org/10.17516/1999-494x-0321","url":null,"abstract":"The results of work on increasing the efficiency of heat energy production in standard boiler units using the «TERMOKOKS-KS» technology by intensifying the energy-technological processing of coal in a fluidized bed are presented. A significant increase in productivity has been established when removing small grades from coal and subsequent drying of coal, which makes it possible to reduce the cost of the obtained heat energy. The coarsening of the particles of the obtained browncoal coke with a decrease in the moisture content of the coal was revealed, which increases its transport characteristics. The range of temperatures of stable operation of the fluidized bed has been increased, due to which the product range of the «TERMOKOKS-KS» process has been expanded. The heat and material balances of the processes of combined production of heat energy and carbon-containing products are presented","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75944331","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}
Kh.I. Kholov, N. T. Sharifboev, Sh.R. Samikhov, Sh R Dzhurakulov, M. Zarifova
The article discusses four alternative cyanide substitutes for the recovery of gold from ores and concentrates. Cyanide has been the premier gold leach reagent for over 100 years due to its high recovery, low cost and reliability. However, environmental damage from improper management has led to widespread research aimed at identifying and developing less toxic leaching agents. The article discusses the most widely researched cyanide substitutes, but it is clear that none of them has yet made any significant incursion into the dominance of cyanide as the preferred reagent in the vast majority of gold mines around the world
{"title":"Gold Leaching by Various Solutions, Alternative of Cyanide and Their Prospects in the Future","authors":"Kh.I. Kholov, N. T. Sharifboev, Sh.R. Samikhov, Sh R Dzhurakulov, M. Zarifova","doi":"10.17516/1999-494x-0324","DOIUrl":"https://doi.org/10.17516/1999-494x-0324","url":null,"abstract":"The article discusses four alternative cyanide substitutes for the recovery of gold from ores and concentrates. Cyanide has been the premier gold leach reagent for over 100 years due to its high recovery, low cost and reliability. However, environmental damage from improper management has led to widespread research aimed at identifying and developing less toxic leaching agents. The article discusses the most widely researched cyanide substitutes, but it is clear that none of them has yet made any significant incursion into the dominance of cyanide as the preferred reagent in the vast majority of gold mines around the world","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77012000","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}
V. I. Karpenok, V. Murko, V. P. Mastikhina, Y. A. Loboda
The article presents results of improvement of physicochemical model of coal-water fuel ignition and combustion processes, taking into account ash content and release of volatile substances of solid phase. In this case, model of ignition and combustion of two systems of atomized coal-water fuel: drops and pure coal particles is taken as a basis. As a result of the analysis, the influence of ash content of coal-water fuel on output of combustible gases and content of water vapor in furnace atmosphere was established. Based on comparison of the diffusion coefficients of gases and the calculated values of equilibrium constants of reaction in combustion zone, conclusion has been of the leading role of water vapor oxidation of carbon in vortex adiabatic furnace. Performed numerical calculations have shown that combustion process of the above inhomogeneous systems (droplets and particles) in an adiabatic furnace within a short time becomes identical. Concentrations of volatile substances, oxygen (O2) and carbon dioxide (CO2) in various sections of the furnace have been established
{"title":"Thermodynamic and Chemical Analysis of Water-Coal Fuel Ignition and Combustion in Adiabatic Combustion Chamber","authors":"V. I. Karpenok, V. Murko, V. P. Mastikhina, Y. A. Loboda","doi":"10.17516/1999-494x-0319","DOIUrl":"https://doi.org/10.17516/1999-494x-0319","url":null,"abstract":"The article presents results of improvement of physicochemical model of coal-water fuel ignition and combustion processes, taking into account ash content and release of volatile substances of solid phase. In this case, model of ignition and combustion of two systems of atomized coal-water fuel: drops and pure coal particles is taken as a basis. As a result of the analysis, the influence of ash content of coal-water fuel on output of combustible gases and content of water vapor in furnace atmosphere was established. Based on comparison of the diffusion coefficients of gases and the calculated values of equilibrium constants of reaction in combustion zone, conclusion has been of the leading role of water vapor oxidation of carbon in vortex adiabatic furnace. Performed numerical calculations have shown that combustion process of the above inhomogeneous systems (droplets and particles) in an adiabatic furnace within a short time becomes identical. Concentrations of volatile substances, oxygen (O2) and carbon dioxide (CO2) in various sections of the furnace have been established","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82070798","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}
With the help of a computational model, the cooling modes of a block of a thermoelectric refrigeration unit designed for ship's provision and freezing chambers are studied. The computational model, based on the numerical solution of a system of nonlinear algebraic equations, takes into account the operating characteristics of a serial thermoelectric module and the thermal resistances of heat removal and supply devices. The dependences of the cooling power and the coefficient of performance of the block on the supply current of the thermoelectric modules are calculated. The analysis of the cooling modes of the thermoelectric block is carried out and recommendations for regulating the current strength depending on the current temperature conditions in the provision and freezing chambers are developed
{"title":"Regulation of Cooling Mode of Thermoelectric Bloc","authors":"E. Vasil'ev","doi":"10.17516/1999-494x-0322","DOIUrl":"https://doi.org/10.17516/1999-494x-0322","url":null,"abstract":"With the help of a computational model, the cooling modes of a block of a thermoelectric refrigeration unit designed for ship's provision and freezing chambers are studied. The computational model, based on the numerical solution of a system of nonlinear algebraic equations, takes into account the operating characteristics of a serial thermoelectric module and the thermal resistances of heat removal and supply devices. The dependences of the cooling power and the coefficient of performance of the block on the supply current of the thermoelectric modules are calculated. The analysis of the cooling modes of the thermoelectric block is carried out and recommendations for regulating the current strength depending on the current temperature conditions in the provision and freezing chambers are developed","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86227736","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}
The problems in the design, operation, and reconstruction of earthen channels analyzed on the example of Mirishkor canal. The need for a new approach to the reconstruction have been defined using the results of field study and HEC-RAS modelling software. Recommendations are given for improving the hydraulic calculation of irrigation canals
{"title":"Hydraulic Calculations of Earthen Channels for Reconstruction","authors":"A. N. Khazratov","doi":"10.17516/1999-494x-0327","DOIUrl":"https://doi.org/10.17516/1999-494x-0327","url":null,"abstract":"The problems in the design, operation, and reconstruction of earthen channels analyzed on the example of Mirishkor canal. The need for a new approach to the reconstruction have been defined using the results of field study and HEC-RAS modelling software. Recommendations are given for improving the hydraulic calculation of irrigation canals","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"140 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80014921","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}
We report on the results of optimizing a single flat heat pipe into an arrangement of heat pipes. A comparison is drawn at the same temperatures and occupied volumes and for a specific maximum temperature of radio-electronic devices. The end result of our studies is that the limiting heat transfer capacity has been found for a single heat pipe and two- and three-level heat pipe assemblies with various heat transfer media. Versatility of the mathematical model enhanced by the optimization method has been proved
{"title":"Heat Pipe System as a Component of Spacecraft Electronics","authors":"N. Sokolov, V. Kulagin, D. Nesterov","doi":"10.17516/1999-494x-0317","DOIUrl":"https://doi.org/10.17516/1999-494x-0317","url":null,"abstract":"We report on the results of optimizing a single flat heat pipe into an arrangement of heat pipes. A comparison is drawn at the same temperatures and occupied volumes and for a specific maximum temperature of radio-electronic devices. The end result of our studies is that the limiting heat transfer capacity has been found for a single heat pipe and two- and three-level heat pipe assemblies with various heat transfer media. Versatility of the mathematical model enhanced by the optimization method has been proved","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"109 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91454063","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}
The process of thermal processing of brown coals of grades 1B and 2B under external overpressure of gases in the range of 0–4.0 MPa is investigated. The dependences of the main characteristics of the obtained products – semi-coke and combustible gas-on the pressure are established. The material and energy balances of the process of thermal processing of both coal grades are given
{"title":"Thermal Processing of Thermal Coal Under Pressure to Produce Semi-Coke and Thermal Energy","authors":"D. Loginov, A. P. Chernykh, S. Islamov","doi":"10.17516/1999-494x-0320","DOIUrl":"https://doi.org/10.17516/1999-494x-0320","url":null,"abstract":"The process of thermal processing of brown coals of grades 1B and 2B under external overpressure of gases in the range of 0–4.0 MPa is investigated. The dependences of the main characteristics of the obtained products – semi-coke and combustible gas-on the pressure are established. The material and energy balances of the process of thermal processing of both coal grades are given","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89101430","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}
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