2022 8th International Youth Conference on Energy (IYCE)最新文献

{"title":"Numerical study of a duct-type ESP with W-type collecting electrodes and different circular corona electrodes radius","authors":"Mo’ath Bani Fayyad, A. A. González, T. Iváncsy","doi":"10.1109/IYCE54153.2022.9857530","DOIUrl":"https://doi.org/10.1109/IYCE54153.2022.9857530","url":null,"abstract":"Electrostatic precipitators (ESPs) have become one of the most essential instruments for removing harmful particles from a wide range of industries. Many ongoing investigations in this field are continually improving because of the inherent privileges that emerge from the usage of an ESP. Different configurations of collecting and discharge electrodes must be studied in order to improve the performance of ESPs. Many researchers are working on enhancing current models in a variety of ways. The purpose of this research is to investigate the W-type configuration of collecting electrodes with various corona electrode diameters in a single-stage ESP. Using the COMSOL Multiphysics simulation tool, the results obtained with W-type are compared in two cases, case A is for 3 corona wires and case B is for 7 corona wires, with 0.75mm, 1mm, and 1.25mm. The consequences of this work show the influence of changing the corona radius size on the electric potential distribution, electric field strength, current density distribution, space charge density distribution, and collecting efficiency when W-type collecting electrodes are used for two cases.","PeriodicalId":248738,"journal":{"name":"2022 8th International Youth Conference on Energy (IYCE)","volume":"390 1-3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114016079","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":"New concept in dynamic line rating computation","authors":"D. Szabó, G. Göcsei, B. Németh, T. Mátrai","doi":"10.1109/IYCE54153.2022.9857534","DOIUrl":"https://doi.org/10.1109/IYCE54153.2022.9857534","url":null,"abstract":"Dynamic line rating (DLR) is a state-of-the-art technology for flexible transmission capacity allocation of overhead lines both in the main distribution and transmission systems. Based on a systematic implementation, DLR technology is not only used to uprate power lines, but also effectively can be applied against the risk posed by the extreme environmental conditions, such as thermal overload of the phase conductors or ice formation. Therefore, the practical usability of this methodology is widely researched, moreover several pilot projects had been implemented for that purpose, too. The international line rating calculation models are based on the thermal equilibrium of the phase conductors. Contrarily, a new calculation method is proposed in this article, which is based on the thermal monitoring of the phase conductors instead of the measurement of the environmental factors. The practical applicability, the advantages and limitations of the model are also discussed in this paper.","PeriodicalId":248738,"journal":{"name":"2022 8th International Youth Conference on Energy (IYCE)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126329879","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":"Failures of Electrical Machines - Review","authors":"Jan Leffler, P. Trnka","doi":"10.1109/IYCE54153.2022.9857519","DOIUrl":"https://doi.org/10.1109/IYCE54153.2022.9857519","url":null,"abstract":"In general, there are many types of electrical rotating machines and transformers within various classes of power range and duty cycles. These machines are operated under either industrial or civil conditions. It is a matter of fact that every machine can eventually fail and both damage and losses can occur. Therefore it is necessary to evaluate failure rates and their distribution over certain types of electrical machines and their subsystems. This paper presents an analysis based on the publicly available data, summarizes and compares results obtained from the studies which have been carried out in the past years. In this paper, important machines' subsystems in terms of failure rate are identified. The failure rate is presented in examples. The cause and location of the faults are discussed. Furthermore, this paper suggests general possible procedures for failure elimination or mitigation of the risks. Outcomes of this paper may be important in the field of maintenance, diagnostics and testing, project management and asset management.","PeriodicalId":248738,"journal":{"name":"2022 8th International Youth Conference on Energy (IYCE)","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121718528","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":"Effective Replacement of the Heating Network Distribution of Central Heating and Hot Water Distribution in Direct Heating System Networks","authors":"Eva Svarcová, Robert Štefanec","doi":"10.1109/IYCE54153.2022.9857537","DOIUrl":"https://doi.org/10.1109/IYCE54153.2022.9857537","url":null,"abstract":"In the reconstruction of distribution heating networks of the direct heating systems, a new heating network is necessary to meet the current heat demand. Old original thermal networks do not meet operating requirements. The solved study we assessed the heat distribution of central heating was originally in steel, and hot water distribution was originally in galvanised steel. This distribution network has been assessed for the city in eastern Slovakia, where the new proposal aim to save operating costs, by reducing heat losses in pipe distribution. The reconstruction of heating networks had the nature of the need for pipeline replacement. Central heating, which was originally designed in steel pipes, we compared with new preinsulated steel pipes and with preinsulated flexible plastic pipes. Final design for central heating, which was with the lowest heat losses was designed in combination in steel and plastic. Part of the distribution above DN 100 has been designed in preinsulated steel pipe and smaller dimensions under DN 100 were designed in preinsulated flexible plastic pipes. This combination of steel and plastic is called a hybrid system. After calculation heat loses in distribution for hot water, we compare new polypropylene pipes to preinsulated flexible plastic pipes. Final design was rated for preinsulated flexible plastic pipes. By modernizing the heat distribution, there will be a significant increase in the efficiency of heat energy distribution into sampling sites. By reducing heat looses to the surroundings, it can be saved in the production and transmission of the heat transfer substance. Due to the correct design for a particular project, we can reduce heat losses in heating networks by 26-46% compared to originally proposed steel pipes. Reducing heat losses in hot water distribution optimization would reduce by 23 to 43% of the original proposal that was designed in polypropylene. The new pipe distribution is provided by the desired parameters of the heat transfer substance for end users and contributes to the overall improvement in the operation of the heating network.","PeriodicalId":248738,"journal":{"name":"2022 8th International Youth Conference on Energy (IYCE)","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130807984","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":"200 Contributors IYCE 22","authors":"","doi":"10.1109/iyce54153.2022.9857539","DOIUrl":"https://doi.org/10.1109/iyce54153.2022.9857539","url":null,"abstract":"","PeriodicalId":248738,"journal":{"name":"2022 8th International Youth Conference on Energy (IYCE)","volume":"17 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123782760","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":"Utilization of Additive Manufacturing in Nuclear Power Industry","authors":"Štěpán Jedlan, M. Ševeček, A. Prantl, M. Brázda, J. Hodek, P. Podaný","doi":"10.1109/IYCE54153.2022.9857541","DOIUrl":"https://doi.org/10.1109/IYCE54153.2022.9857541","url":null,"abstract":"The technology of additive manufacturing (AM) offers great opportunities, such as complex geometries and shapes of desired products. In contrast to other conventional methods, specifically subtractive and formative, where the material is subtracted or filled into a form, the principle of AM is material addition. The material is added in thin layers, one on top of the other, and then sintered, usually using a laser or an electron beam. The process is then continuously repeated until the product is finished. The presented paper discusses AM methods that use metal materials and it describes the application of these methods in the nuclear power industry. The most common technologies are powder bed fusion (PBF) and direct energy deposition (DED). This contribution also discusses the materials AISI 316L and 08CH18N10T, as they are widely used in the nuclear industry and are part of future experiments.","PeriodicalId":248738,"journal":{"name":"2022 8th International Youth Conference on Energy (IYCE)","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115617714","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":"Overview of the EROI, a tool to measure energy availability through the energy transition","authors":"Kevin Pahud, Greg De Temmerman","doi":"10.1109/IYCE54153.2022.9857542","DOIUrl":"https://doi.org/10.1109/IYCE54153.2022.9857542","url":null,"abstract":"The importance of energy consumption to allow societies to thrive is well established and prospects of energy needs is well derived through the scientific literature. Yet, lesser discussions persist on the future availability of energy for current industrial economies, a crucial indicator for development. It is defined as net-energy analysis, where one must appropriate more energy than required to get it. The most common indicators are the energy payback time and the EROI (Energy Return of Investment). These indicators are used throughout literature either for energy vectors, energy systems or for broader societal applications. Following growing concerns about climate change, and with the increasing difficulty of extraction of fossil fuels, EROIs became tools to study the global energy transition with a focus on a possible minimum EROI required to maintain a complex society. However, the indicator is used with a large variety of methods, definitions, and boundaries. This led to a lack of consensus on whether a transition to renewable-based energy systems could still provide sufficient net energy for societies to thrive. The concepts of EROI were studied by compiling its various definitions, boundaries, and limits, allowing a clear view of the indicator to understand where and how it could be used. This led to finding three main classes of indicators: the physical EROI, an indicator based on energy consumption, a price-based societal EROI, an indicator using monetary expenditures to look at energy-related expenditures, and finally a socioeconomic EROI which looks at energy expenditures within a nation's economy. A detailed review of those use cases led to understanding that the EROI is often badly calculated through wrong boundaries, goals, or with old data and that no norm exists for its calculation. These inconsistencies tend to negatively bias renewable technologies as a solution to the energy transition. Furthermore, most calculations of minimal EROIs are based on fossil fuel infrastructure, with current energy systems being highly inefficient. The previously calculated minimal EROIs through literature, penalizing renewable technologies, are challenged. The study discusses the possibility of transitioning away from fossil fuels' dependence based on updated data and literature to finally conclude that renewable can offer sufficient energy through the energy transition. This sufficiency however comes with short-term limits followed by a possible drop in net-energy due to the transitory nature of the global shift to mitigate climate change.","PeriodicalId":248738,"journal":{"name":"2022 8th International Youth Conference on Energy (IYCE)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114789920","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":"Study and Numerical Simulation of Particle Collection and Trajectory of Particle Motion in a Duct-type Electrostatic Precipitator with Seven Circular Corona Wires","authors":"A. A. González, Iváncsy Tamás","doi":"10.1109/IYCE54153.2022.9857533","DOIUrl":"https://doi.org/10.1109/IYCE54153.2022.9857533","url":null,"abstract":"An electrostatic precipitator (ESP) is an industrial equipment used for many years. Its main objective has been to mitigate the environmental impact due to the emission of gases that are produced in large industries. Mathematical models have been established for most of the physical phenomena that happen inside ESP. In this research work, the ESP geometrical dimensions are defined based on an ESP prototype, for instance, flat collecting plates and seven circular corona wires are used, and the corresponding models, parameters, operating conditions, and boundary conditions are described and simulated in a Multiphysics software. As relevant results found are the resolution of the transport equation and trajectory of particle motion. Besides, a comparison among the models for particle charging is shown in the results section, emphasizing when the particle radius is about 0.2 μm, where Lawless's model is used as a reference, which has been mentioned in most research works.","PeriodicalId":248738,"journal":{"name":"2022 8th International Youth Conference on Energy (IYCE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128974213","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":"Comparison of Different Heuristic Algorithms in a Centralized Implementation of a Distributed Power Flow Control System","authors":"Hadi Ibrahim, O. Pohl, U. Häger","doi":"10.1109/IYCE54153.2022.9857517","DOIUrl":"https://doi.org/10.1109/IYCE54153.2022.9857517","url":null,"abstract":"Today, congestion management on higher voltage levels is almost exclusively done preventively. However, integrating curative measures which utilize flexible power and innovative control equipment such as Impedance Controllers (ICs) can leverage significant benefits for grid operation. To ensure these curative measures take effect in due time, they should be activated by an automated system. In this work, a centralized replica of a distributed Multi-Agent System (MAS) is developed as a kind of simplified digital twin. The MAS uses heuristic search algorithms based on dc sensitivity analysis to eliminate grid congestion. By centrally replicating the underlying control algorithms, control interventions of the distributed system can be predicted. Also, testing and troubleshooting of new Heuristic Control Algorithms (HCAs) is facilitated by the centralized version. This way, in addition to the existing HCA, alternative heuristics are developed, implemented and tested in this centralized version. The proposed heuristics focus on the differences in the calculation of IC sensitivities and their accuracies for overload control. Besides, they make a broader range of choices of Flexible Power Units (FPUs) available to solve overloads in the grid, making the algorithm more efficient. Furthermore, the control heuristics are validated with Optimal Power Flow (OPF) approaches. For the validation of the system, the IEEE 39 New England Test-Bus system is used in Matlab MATPOWER.","PeriodicalId":248738,"journal":{"name":"2022 8th International Youth Conference on Energy (IYCE)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124618238","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":"Practical experience with induced voltages and currents in double-circuit transmission lines","authors":"László Székely, László Gyergyádesz, R. Cselkó, G. Göcsei, B. Németh","doi":"10.1109/IYCE54153.2022.9857529","DOIUrl":"https://doi.org/10.1109/IYCE54153.2022.9857529","url":null,"abstract":"On a double circuit transmission line, maintenance work can be performed using conventional working methods on the de-energized system while the other one is still energized. Due to capacitive and inductive effects, induced voltages and currents appear on the phase conductors of the passive side. The induction rate depends on the geometrical position of each wire, the voltage and current conditions on the active side, and the inductive impedance parameters of the ground and wires. Our study presents the phenomena of induced voltage and current and their influential parameters in case of double circuit transmission lines. Aside from the theoretical calculations, we conducted on-site measurements on two different typical tower layouts in Hungary. The results of these measurements differ from the theoretical values, which are discussed in the paper.","PeriodicalId":248738,"journal":{"name":"2022 8th International Youth Conference on Energy (IYCE)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116897808","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}