Pub Date : 2022-10-03DOI: 10.1109/KhPIWeek57572.2022.9916373
A. Kokorev, Oleg Avrunin
In the present work the existing one-dimensional mathematical model of wound healing angiogenesis was wrapped into the computer program with a convenient interface. The model considers two variables: capillary tip density and endothelial cells density. The model is continuous and consists of two PDEs. Our program allows to find the speed and the time of wound healing as well as the distribution of the variables at any stage of healing, from the small set of measured (or estimated) input parameters. The usage of the program was demonstrated on the different sets of input parameters: those that considered to be “normal” ones and “pathological” ones.
{"title":"Simple Wound Healing Simulation Program Based on Mathematical Model of Angiogenesis","authors":"A. Kokorev, Oleg Avrunin","doi":"10.1109/KhPIWeek57572.2022.9916373","DOIUrl":"https://doi.org/10.1109/KhPIWeek57572.2022.9916373","url":null,"abstract":"In the present work the existing one-dimensional mathematical model of wound healing angiogenesis was wrapped into the computer program with a convenient interface. The model considers two variables: capillary tip density and endothelial cells density. The model is continuous and consists of two PDEs. Our program allows to find the speed and the time of wound healing as well as the distribution of the variables at any stage of healing, from the small set of measured (or estimated) input parameters. The usage of the program was demonstrated on the different sets of input parameters: those that considered to be “normal” ones and “pathological” ones.","PeriodicalId":197096,"journal":{"name":"2022 IEEE 3rd KhPI Week on Advanced Technology (KhPIWeek)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122334998","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}
Pub Date : 2022-10-03DOI: 10.1109/KhPIWeek57572.2022.9916498
Y. Romasevych, V. Loveikin, A. Loveikin
Particle swarm optimization (PSO) performance is greatly influenced by the size of a swarm and the number of iterations. In order to define the reasonable ratio,, swarm size - iteration number” in PSO four well-known benchmark functions were used during poor calculation resources. Multiplication of swarm size and iterations number was used as the calculation resources indicator. It was found, that an application of the swarms, which include up to 50 particles, is reasonable for poor calculation resources.
{"title":"Investigation of an Influence of a Ratio,, Swarm Size - Iterations Number” on Particle Swarm Optimization Performance","authors":"Y. Romasevych, V. Loveikin, A. Loveikin","doi":"10.1109/KhPIWeek57572.2022.9916498","DOIUrl":"https://doi.org/10.1109/KhPIWeek57572.2022.9916498","url":null,"abstract":"Particle swarm optimization (PSO) performance is greatly influenced by the size of a swarm and the number of iterations. In order to define the reasonable ratio,, swarm size - iteration number” in PSO four well-known benchmark functions were used during poor calculation resources. Multiplication of swarm size and iterations number was used as the calculation resources indicator. It was found, that an application of the swarms, which include up to 50 particles, is reasonable for poor calculation resources.","PeriodicalId":197096,"journal":{"name":"2022 IEEE 3rd KhPI Week on Advanced Technology (KhPIWeek)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130725736","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}
Pub Date : 2022-10-03DOI: 10.1109/KhPIWeek57572.2022.9916412
V. Busher, O. Chornyi, V. Tytiuk, O. Glazeva, Oleksandr Rozlutskyi, Vitaliy Kuznetsov
Purpose. The aim of this work is to compare the effectiveness of various methods for correcting cell failures in cascade high voltage frequency converters. These methods provide the smallest voltage drop on the motor, the least loads and oscillation of electromagnetic torque in an accident modes, and evaluate the effectiveness of pulse width modulation (PWM) methods with the injection of third harmonic and space-vector PWM in normal and emergency modes. Methodology. We use mathematical and geometrical interpretation of all analysed methods - Sinusoidal PWM (SPWM), Balanced sinusoidal PWM (BSPWM), Balanced PWM with injected 3rd harmonic (THPWM) and Balanced Space Vector PWM (SVPWM). Results. The method of balancing the phase-to-phase voltages by to such a shift of the zero point and rotation of the phase vectors, in which the amplitude of the phase-to-phase voltage decreases to the minimum possible value. Injection of the 3rd harmonic allows you to further increase the utilisation factor of power supplies in terms of voltage. But the violation of the symmetry of the phase voltages leads to the need to reduce the voltage amplitude to exclude saturation of the power supplies, which reduces this coefficient compared to the theoretically possible 15.6%. A distinctive feature of the method of balanced Space Vector PWM is that the amplitude of the 1st harmonic is always greater than the radius of the circle by 15.6%. Comparison of methods of space vector PWM (SVPWM), balancing of phase-to-phase voltage with the injection of the 3rd harmonic (THPWM) with sinusoidal PWM shows that SVPWM is the best method. Despite the more complex mathematical software for the implementation of this method, it provides the best performance in all considered emergency modes of 3…6 cascade converters. The Table of indicators for all methods are presented in the article. The use of a balanced SVPWM in combination with field oriented control makes it possible to obtain an electric drive in which, in the event of an accident, there are practically no shock mechanical and electromagnetic processes. After damage of cells the currents, electromagnetic torque and motor speed change along the required trajectory.
{"title":"Methods of Pulse Width Modulation in Cascaded High Voltage Frequency Converters","authors":"V. Busher, O. Chornyi, V. Tytiuk, O. Glazeva, Oleksandr Rozlutskyi, Vitaliy Kuznetsov","doi":"10.1109/KhPIWeek57572.2022.9916412","DOIUrl":"https://doi.org/10.1109/KhPIWeek57572.2022.9916412","url":null,"abstract":"Purpose. The aim of this work is to compare the effectiveness of various methods for correcting cell failures in cascade high voltage frequency converters. These methods provide the smallest voltage drop on the motor, the least loads and oscillation of electromagnetic torque in an accident modes, and evaluate the effectiveness of pulse width modulation (PWM) methods with the injection of third harmonic and space-vector PWM in normal and emergency modes. Methodology. We use mathematical and geometrical interpretation of all analysed methods - Sinusoidal PWM (SPWM), Balanced sinusoidal PWM (BSPWM), Balanced PWM with injected 3rd harmonic (THPWM) and Balanced Space Vector PWM (SVPWM). Results. The method of balancing the phase-to-phase voltages by to such a shift of the zero point and rotation of the phase vectors, in which the amplitude of the phase-to-phase voltage decreases to the minimum possible value. Injection of the 3rd harmonic allows you to further increase the utilisation factor of power supplies in terms of voltage. But the violation of the symmetry of the phase voltages leads to the need to reduce the voltage amplitude to exclude saturation of the power supplies, which reduces this coefficient compared to the theoretically possible 15.6%. A distinctive feature of the method of balanced Space Vector PWM is that the amplitude of the 1st harmonic is always greater than the radius of the circle by 15.6%. Comparison of methods of space vector PWM (SVPWM), balancing of phase-to-phase voltage with the injection of the 3rd harmonic (THPWM) with sinusoidal PWM shows that SVPWM is the best method. Despite the more complex mathematical software for the implementation of this method, it provides the best performance in all considered emergency modes of 3…6 cascade converters. The Table of indicators for all methods are presented in the article. The use of a balanced SVPWM in combination with field oriented control makes it possible to obtain an electric drive in which, in the event of an accident, there are practically no shock mechanical and electromagnetic processes. After damage of cells the currents, electromagnetic torque and motor speed change along the required trajectory.","PeriodicalId":197096,"journal":{"name":"2022 IEEE 3rd KhPI Week on Advanced Technology (KhPIWeek)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133115771","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}
Pub Date : 2022-10-03DOI: 10.1109/KhPIWeek57572.2022.9916382
O. Bialobrzheskyi, Maxim Oliynichenko, O. Todorov, I. Reva, M. Bezzub, A. Postil
Study of electricity consumption in the workshop of an industrial enterprise with a furnace drive electrical complex, the power part of which is made by a semiconductors rectifier - DC motor system. The study was conducted on a model compiled in a visual programming environment. Guided by the calculation formulas recommended by the IEEE 1459–2010 standard for determining of active and reactive power components, the corresponding measuring subsystem was introduced into the model. A number of experiments were carried out under the condition of control angle changing a semiconductors converter. The values of the fundamental and higher harmonics in active and reactive power are determined. It has been established that the reactive power of higher harmonics generated by a controlled semiconductors converter is transmitted through a step-down transformer without changes. The proposed procedure of separating the higher harmonics active and reactive power is rational to apply in the electric energy technical accounting systems an industrial enterprises.
{"title":"The Electricity Distribution of Alternating Current and Voltage Higher Harmonics Research in Network with Electrical Complex of Direct Current Drive","authors":"O. Bialobrzheskyi, Maxim Oliynichenko, O. Todorov, I. Reva, M. Bezzub, A. Postil","doi":"10.1109/KhPIWeek57572.2022.9916382","DOIUrl":"https://doi.org/10.1109/KhPIWeek57572.2022.9916382","url":null,"abstract":"Study of electricity consumption in the workshop of an industrial enterprise with a furnace drive electrical complex, the power part of which is made by a semiconductors rectifier - DC motor system. The study was conducted on a model compiled in a visual programming environment. Guided by the calculation formulas recommended by the IEEE 1459–2010 standard for determining of active and reactive power components, the corresponding measuring subsystem was introduced into the model. A number of experiments were carried out under the condition of control angle changing a semiconductors converter. The values of the fundamental and higher harmonics in active and reactive power are determined. It has been established that the reactive power of higher harmonics generated by a controlled semiconductors converter is transmitted through a step-down transformer without changes. The proposed procedure of separating the higher harmonics active and reactive power is rational to apply in the electric energy technical accounting systems an industrial enterprises.","PeriodicalId":197096,"journal":{"name":"2022 IEEE 3rd KhPI Week on Advanced Technology (KhPIWeek)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130097608","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}
Pub Date : 2022-10-03DOI: 10.1109/KhPIWeek57572.2022.9916439
S. Gavrylenko, Oleksii Hornostal, V. Chelak
Peculiarities of constructing ensemble bagging classifiers for identifying the state of a computer system under conditions of noisy data are studied. Decision trees and multilayer perceptron were used as basic classifiers. It was found that the accuracy of the bagging algorithm with decision trees as basic classifiers with standard settings ranges from 84.4% to 88.7%. The use of Bootstrap algorithms for the formation of data samples: Pasting, Bootstrapping, Random Subspace, Random Patches Ensemble and the selection of the number of basic classifiers in the ensemble made it possible to increase the classification accuracy to 90.2%. The following parameters were added to improve the accuracy of bagging classifiers based on the multilayer perceptron: the algorithm for forming data samples, the number of basic classifiers in the ensemble, the function of optimizing the neural network, the function of activating hidden layer, size of hidden layers. The recommendation was made to choose the value of the analyzed parameters for the creation of bagging ensembles with multilayer perceptrons, which made it possible to increase the accuracy of computer system identification up to 92.2%. The obtained results have further practical significance and can be used in improving the methods of identifying the state of computer systems.
{"title":"Research of Methods of Identifying the Computer Systems State based on Bagging Classifiers","authors":"S. Gavrylenko, Oleksii Hornostal, V. Chelak","doi":"10.1109/KhPIWeek57572.2022.9916439","DOIUrl":"https://doi.org/10.1109/KhPIWeek57572.2022.9916439","url":null,"abstract":"Peculiarities of constructing ensemble bagging classifiers for identifying the state of a computer system under conditions of noisy data are studied. Decision trees and multilayer perceptron were used as basic classifiers. It was found that the accuracy of the bagging algorithm with decision trees as basic classifiers with standard settings ranges from 84.4% to 88.7%. The use of Bootstrap algorithms for the formation of data samples: Pasting, Bootstrapping, Random Subspace, Random Patches Ensemble and the selection of the number of basic classifiers in the ensemble made it possible to increase the classification accuracy to 90.2%. The following parameters were added to improve the accuracy of bagging classifiers based on the multilayer perceptron: the algorithm for forming data samples, the number of basic classifiers in the ensemble, the function of optimizing the neural network, the function of activating hidden layer, size of hidden layers. The recommendation was made to choose the value of the analyzed parameters for the creation of bagging ensembles with multilayer perceptrons, which made it possible to increase the accuracy of computer system identification up to 92.2%. The obtained results have further practical significance and can be used in improving the methods of identifying the state of computer systems.","PeriodicalId":197096,"journal":{"name":"2022 IEEE 3rd KhPI Week on Advanced Technology (KhPIWeek)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132712066","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}
Pub Date : 2022-10-03DOI: 10.1109/KhPIWeek57572.2022.9916319
O. Shutenko, O. Kulyk
The article deals with the authors' most recent methods of defect type recognition based on the results of dissolved gas analysis. The analysis of diagnostic criteria used by these methods for defect type recognition is performed. The results of comparative analysis of reliability of defect recognition of different types with the considered methods are given. It is found that recognition reliability for all analysed methods is approximately at the same level, but there are differences in recognition reliability of different methods in relation to defects of different types.
{"title":"Comparative Analysis of New Methods for Defect Type Recognition by Dissolved Gas Analysis","authors":"O. Shutenko, O. Kulyk","doi":"10.1109/KhPIWeek57572.2022.9916319","DOIUrl":"https://doi.org/10.1109/KhPIWeek57572.2022.9916319","url":null,"abstract":"The article deals with the authors' most recent methods of defect type recognition based on the results of dissolved gas analysis. The analysis of diagnostic criteria used by these methods for defect type recognition is performed. The results of comparative analysis of reliability of defect recognition of different types with the considered methods are given. It is found that recognition reliability for all analysed methods is approximately at the same level, but there are differences in recognition reliability of different methods in relation to defects of different types.","PeriodicalId":197096,"journal":{"name":"2022 IEEE 3rd KhPI Week on Advanced Technology (KhPIWeek)","volume":"22 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114038273","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}
Pub Date : 2022-10-03DOI: 10.1109/KhPIWeek57572.2022.9916376
B. Gorkunov, Y. Borysenko, S. Lvov, I. Chahine, N. Pavlova
In the article the authors consider the electromagnetic transducer for multiparameter non-destructive testing of metal cylinders. The publications review shows that the task of monitoring the stress-strain state of cylindrical metal elements of machinery is relevant. The detection of such a state is carried out by measuring the electrophysical parameters of these cylinders. It is shown that these parameters are arguments of the functions of the magnetic flux density vector components, which are considered in a 2D cylindrical coordinate system. A distribution of the tangential and radial components of the electromagnetic field in the space surrounding the tested object is obtained. The zones of the non-informative output signal of the measuring coils are determined for the case of their placement on a circle of a fixed radius. Such zones are also defined when normalized signals are used.
{"title":"Aspects of the design of the electromagnetic transducer for diagnosing machinery elements","authors":"B. Gorkunov, Y. Borysenko, S. Lvov, I. Chahine, N. Pavlova","doi":"10.1109/KhPIWeek57572.2022.9916376","DOIUrl":"https://doi.org/10.1109/KhPIWeek57572.2022.9916376","url":null,"abstract":"In the article the authors consider the electromagnetic transducer for multiparameter non-destructive testing of metal cylinders. The publications review shows that the task of monitoring the stress-strain state of cylindrical metal elements of machinery is relevant. The detection of such a state is carried out by measuring the electrophysical parameters of these cylinders. It is shown that these parameters are arguments of the functions of the magnetic flux density vector components, which are considered in a 2D cylindrical coordinate system. A distribution of the tangential and radial components of the electromagnetic field in the space surrounding the tested object is obtained. The zones of the non-informative output signal of the measuring coils are determined for the case of their placement on a circle of a fixed radius. Such zones are also defined when normalized signals are used.","PeriodicalId":197096,"journal":{"name":"2022 IEEE 3rd KhPI Week on Advanced Technology (KhPIWeek)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128309324","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}
Pub Date : 2022-10-03DOI: 10.1109/KhPIWeek57572.2022.9916499
S. Dovgyi, O. Trofymchuk, O. Lebid, I. Kaliukh, V. Berchun, Y. Berchun
Vertical bladeless wind turbine looks like a huge baseball bat fixed on a handle and swaying in the wind. The vortices are created in this flow at the back of the body and periodically are separated from either side of the body. This effect is called Von Kármán vortex street. It is destructive for civil structures. The Vortex Bladeless engineers decided to make use of this destructive effect. Vertical bladeless wind turbine starts to oscillate at the lower speeds of the wind. It is possible to locate stations much closer to each other. The turbines of the classical design with a dense arrangement do not receive enough wind flow, but this bladeless generator only benefits from a dense placement as its oscillatory effect is amplified by the vortices from the generators ahead. Also, it produces almost no harmful noise, it is safe for birds and doesn't close the horizon. The reasons and the set of parameters leading to aeroelastic flutter oscillations in distributed systems (DS) are investigated. The instability is caused by the combined influence of three factors: the disturbances drift along the DS in the flow, the bending stiffness, and the influence of an inertial force, which is a distributed load moving along the DS. The described mathematical concept and numerical algorithm, as well as the achieved results can be used to design and optimize the bladeless wind turbines operation modes.
{"title":"Aeroelastic Flutter Oscilations of Distributed Systems","authors":"S. Dovgyi, O. Trofymchuk, O. Lebid, I. Kaliukh, V. Berchun, Y. Berchun","doi":"10.1109/KhPIWeek57572.2022.9916499","DOIUrl":"https://doi.org/10.1109/KhPIWeek57572.2022.9916499","url":null,"abstract":"Vertical bladeless wind turbine looks like a huge baseball bat fixed on a handle and swaying in the wind. The vortices are created in this flow at the back of the body and periodically are separated from either side of the body. This effect is called Von Kármán vortex street. It is destructive for civil structures. The Vortex Bladeless engineers decided to make use of this destructive effect. Vertical bladeless wind turbine starts to oscillate at the lower speeds of the wind. It is possible to locate stations much closer to each other. The turbines of the classical design with a dense arrangement do not receive enough wind flow, but this bladeless generator only benefits from a dense placement as its oscillatory effect is amplified by the vortices from the generators ahead. Also, it produces almost no harmful noise, it is safe for birds and doesn't close the horizon. The reasons and the set of parameters leading to aeroelastic flutter oscillations in distributed systems (DS) are investigated. The instability is caused by the combined influence of three factors: the disturbances drift along the DS in the flow, the bending stiffness, and the influence of an inertial force, which is a distributed load moving along the DS. The described mathematical concept and numerical algorithm, as well as the achieved results can be used to design and optimize the bladeless wind turbines operation modes.","PeriodicalId":197096,"journal":{"name":"2022 IEEE 3rd KhPI Week on Advanced Technology (KhPIWeek)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128628988","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}
Pub Date : 2022-10-03DOI: 10.1109/KhPIWeek57572.2022.9916338
T. Haikova, V. Puzyr, D. Kovalchuk, Denys Havrylov, Roman Haikov, Anna Haikova
It is shown that metals and alloy binary systems are widely used in technology due to the uniqueness of their mechanical, physical and chemical properties. Anisotropy of mechanical and electrical properties, which is due to cold plastic deformation, is not unimportant. Binary systems use is not limited to the mechanical engineering industry but also finds application in electrical engineering, automobile, aircraft, and rocket production. In this case, many parts are obtained by metal forming methods, which are characterized by ultimate plastic strain, heating, and hardening. Therefore, to predict the quality of products made of bimetallic compositions, it is necessary to be able to control the stress and deformation fields in the form alteration process. This is achieved by analyzing the component's initial mechanical properties, threshold deformation, anisotropy, hardness, and plasticity, and electrical conductivity. Based on this information, it is possible to find the system deformation regularities in which there is an inextricable layer connection. It is shown that as a result of the binary system deformation, the soft layer deformation becomes more difficult, and the hard layer deformation is facilitated, which leads to the convergence of the soft and hard layers deformation, and, consequently, to a decrease in the uneven bimetal deformation. This circumstance affects the electrical resistance of the bimetal and leads to anisotropy of electrical conductivity, which consequently contributes to an increase in heat losses due to eddy currents in electrical grids and devices.
{"title":"Control of Electrical Conductivity of Bimetal by Joint Plastic Deformation and Heat Treatment","authors":"T. Haikova, V. Puzyr, D. Kovalchuk, Denys Havrylov, Roman Haikov, Anna Haikova","doi":"10.1109/KhPIWeek57572.2022.9916338","DOIUrl":"https://doi.org/10.1109/KhPIWeek57572.2022.9916338","url":null,"abstract":"It is shown that metals and alloy binary systems are widely used in technology due to the uniqueness of their mechanical, physical and chemical properties. Anisotropy of mechanical and electrical properties, which is due to cold plastic deformation, is not unimportant. Binary systems use is not limited to the mechanical engineering industry but also finds application in electrical engineering, automobile, aircraft, and rocket production. In this case, many parts are obtained by metal forming methods, which are characterized by ultimate plastic strain, heating, and hardening. Therefore, to predict the quality of products made of bimetallic compositions, it is necessary to be able to control the stress and deformation fields in the form alteration process. This is achieved by analyzing the component's initial mechanical properties, threshold deformation, anisotropy, hardness, and plasticity, and electrical conductivity. Based on this information, it is possible to find the system deformation regularities in which there is an inextricable layer connection. It is shown that as a result of the binary system deformation, the soft layer deformation becomes more difficult, and the hard layer deformation is facilitated, which leads to the convergence of the soft and hard layers deformation, and, consequently, to a decrease in the uneven bimetal deformation. This circumstance affects the electrical resistance of the bimetal and leads to anisotropy of electrical conductivity, which consequently contributes to an increase in heat losses due to eddy currents in electrical grids and devices.","PeriodicalId":197096,"journal":{"name":"2022 IEEE 3rd KhPI Week on Advanced Technology (KhPIWeek)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134365230","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}
Pub Date : 2022-10-03DOI: 10.1109/KhPIWeek57572.2022.9916399
K. Minakova, R. Zaitsev, M. Kirichenko, B. Vorobiov
In paper, solar collectors and thermophotoelectric systems (PV/T) are considered, which are one of the most promising systems for instilling energy. Electricity, which is vibrated by photovoltaic panels, has a great potential, but there may be technological shortcomings, which do not give maximum efficiency. The meta of our research is the development of a universal model of heat exchange processes for optimizing the design features of PV/T systems at the stages of design and variability, which allows us to increase the term of service of such systems and increase their efficiency. The expanded model allows you to change more practical parameters for two coordinates of a flat collector, such as to change the consumption of thermal energy, thermal support of the absorber plate, heat exchange, operating temperature, etc. The results of the model investigations correlate with the experimental data. On the basis of the proposed model, a software product for the model-bath of PV/T systems was developed and tested on the experimental results of those ready-to-wear PV/T systems. In the course of carrying out the expansions, depending on the basic parameters, the heating of heat was removed when one segment of the collector was passed by approximately 1.5 °C. The designated in-crease in temperature is reached at a heat transfer rate of 0.6 m/s, which is to achieve a great rate. The most optimal will be the heating of heat when passing through the collector by 5 °C, which will allow to re-duce the speed of heat transfer to 0.2 m/s and significantly reduce the amount of electricity consumed by the pump. The variation of the expanded model allows to implement a wide range of optimization tasks at the stages of designing and optimizing solar collectors and PV/T systems, to take the optimal design parame-ters to achieve the greatest efficiency and minimum occupancy.
{"title":"Heat Balance Model for PV/T Systems","authors":"K. Minakova, R. Zaitsev, M. Kirichenko, B. Vorobiov","doi":"10.1109/KhPIWeek57572.2022.9916399","DOIUrl":"https://doi.org/10.1109/KhPIWeek57572.2022.9916399","url":null,"abstract":"In paper, solar collectors and thermophotoelectric systems (PV/T) are considered, which are one of the most promising systems for instilling energy. Electricity, which is vibrated by photovoltaic panels, has a great potential, but there may be technological shortcomings, which do not give maximum efficiency. The meta of our research is the development of a universal model of heat exchange processes for optimizing the design features of PV/T systems at the stages of design and variability, which allows us to increase the term of service of such systems and increase their efficiency. The expanded model allows you to change more practical parameters for two coordinates of a flat collector, such as to change the consumption of thermal energy, thermal support of the absorber plate, heat exchange, operating temperature, etc. The results of the model investigations correlate with the experimental data. On the basis of the proposed model, a software product for the model-bath of PV/T systems was developed and tested on the experimental results of those ready-to-wear PV/T systems. In the course of carrying out the expansions, depending on the basic parameters, the heating of heat was removed when one segment of the collector was passed by approximately 1.5 °C. The designated in-crease in temperature is reached at a heat transfer rate of 0.6 m/s, which is to achieve a great rate. The most optimal will be the heating of heat when passing through the collector by 5 °C, which will allow to re-duce the speed of heat transfer to 0.2 m/s and significantly reduce the amount of electricity consumed by the pump. The variation of the expanded model allows to implement a wide range of optimization tasks at the stages of designing and optimizing solar collectors and PV/T systems, to take the optimal design parame-ters to achieve the greatest efficiency and minimum occupancy.","PeriodicalId":197096,"journal":{"name":"2022 IEEE 3rd KhPI Week on Advanced Technology (KhPIWeek)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132981763","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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