Hungarian Journal of Industry and Chemistry最新文献_第5页

A Framework for Demonstration Devices Used in Distance-Learning Environments 用于远程学习环境的演示设备框架

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Hungarian Journal of Industry and Chemistry Pub Date : 2021-09-21 DOI: 10.33927/hjic-2021-03

Péter Decsi, Ádám Bors, Péter Kocsor, Bálint Vörös, B. Horváth, S. Guba, Z. Gugolya, S. Mester, I. Szalai

引用次数: 1

Modelling of the Pyrolysis Zone of a Downdraft Gasification Reactor 下吸式气化反应器热解区模拟

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Hungarian Journal of Industry and Chemistry Pub Date : 2021-09-21 DOI: 10.33927/hjic-2021-09

Márta Kákonyi, Ágnes Bárkányi, T. Chován, S. Németh

引用次数: 0

Polyvinylpyrrolidone as a Corrosion Inhibitor for Carbon Steel in a Perchloric Acid Solution: Effect of Structural Size 聚乙烯吡咯烷酮作为碳钢在高氯酸溶液中的缓蚀剂:结构尺寸的影响

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Hungarian Journal of Industry and Chemistry Pub Date : 2021-09-21 DOI: 10.33927/hjic-2021-08

A. Benchadli, T. Attar, Boulanouar Messaoudi, E. Choukchou-Braham

{"title":"Polyvinylpyrrolidone as a Corrosion Inhibitor for Carbon Steel in a Perchloric Acid Solution: Effect of Structural Size","authors":"A. Benchadli, T. Attar, Boulanouar Messaoudi, E. Choukchou-Braham","doi":"10.33927/hjic-2021-08","DOIUrl":"https://doi.org/10.33927/hjic-2021-08","url":null,"abstract":"Polymers are materials composed of macromolecules characterized by duplicates of smaller molecules that are covalently bonded together to provide a set of properties. Corrosion inhibition by such compounds is usually attributed to their adsorption on the metal-solution interface. The inhibition effect of different sizes of polyvinylpyrrolidone (PVP) on the corrosion of carbon steel (C-steel) in solutions of perchloric acid was investigated. The inhibition efficiency increases as the size of the inhibitor and its concentration increases, but decreases as the temperature increases and can reach a value of 81.53% and 5.0x10^-3 mol L^-1(PVP: 58,000 g mol^-1) at 30°C. The most remarkable inhibition efficiency was confirmed by the presence of the film formed on the metal surface by scanning electron microscopy. The kinetic and thermodynamic parameters for the corrosion of C-steel and adsorption of the inhibitor were determined and discussed. The combination of PVP with potassium iodide produced a strong synergistic effect on the inhibition of C-steel corrosion leading to a significant improvement in the inhibition efficiency. Quantum chemical parameters were studied using density functional theory to determine the possible relationship between the inhibitor and its electronic properties.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45093188","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}

引用次数: 7

Electric Vehicle Modelling and Simulation of a Light Commercial Vehicle Using PMSM Propulsion 基于PMSM推进的轻型商用车电动汽车建模与仿真

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Hungarian Journal of Industry and Chemistry Pub Date : 2021-09-21 DOI: 10.33927/hjic-2021-06

Aminu Babangida, P. Szemes

{"title":"Electric Vehicle Modelling and Simulation of a Light Commercial Vehicle Using PMSM Propulsion","authors":"Aminu Babangida, P. Szemes","doi":"10.33927/hjic-2021-06","DOIUrl":"https://doi.org/10.33927/hjic-2021-06","url":null,"abstract":"Even though the Internal Combustion Engine (ICE) used in conventional vehicles is one of the major causes of global warming and air pollution, the emission of toxic gases is also harmful to living organisms. Electric propulsion has been developed in modern electric vehicles to replace the ICE.The aim of this research is to use both the Simulink and Simscape toolboxes in MATLAB to model the dynamics of a light commercial vehicle powered by electric propulsion. This research focuses on a Volkswagen Crafter with a diesel propulsion engine manufactured in 2020. A rear-wheel driven electric powertrain based on a Permanent Magnet Synchronous Motor was designed to replace its front-wheel driven diesel engine in an urban environment at low average speeds.In this research, a Nissan Leaf battery with a nominal voltage of 360 V and a capacity of 24 kWh was modelled to serve as the energy source of the electric drivetrain. The New European Driving Cycle was used in this research to evaluate the electric propulsion. Another test input such as a speed ramp was also used to test the vehicle under different road conditions. A Proportional Integral controller was applied to control the speed of both the vehicle and synchronous motor. Different driving cycles were used to test the vehicle. The vehicle demonstrated a good tracking capability in each type of test. In addition, this research determined that the fuel economy of electric vehicles is approximately 19% better than that of conventional vehicles.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49422540","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}

引用次数: 10

Daphnia Magna Acute Immobilization Test: an Opportunity to Test the Ecotoxicity of Alternative Fuels 水蚤麦格纳急性固定试验:一个机会，以测试替代燃料的生态毒性

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Hungarian Journal of Industry and Chemistry Pub Date : 2021-09-21 DOI: 10.33927/hjic-2021-10

K. Hubai

引用次数: 0

3D Scanning and Model Error Distribution-Based Characterisation of Welding Defects 基于三维扫描和模型误差分布的焊接缺陷表征

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Hungarian Journal of Industry and Chemistry Pub Date : 2021-01-01 DOI: 10.33927/hjic-2021-13

János Hegedűs-Kuti, József Szőlősi, Dániel Varga, G. Farkas, Tamás Ruppert, J. Abonyi, M. Andó

引用次数: 0

Editorial Preface to the Special Issue Dedicated to the Manufacturing_2021 Conference 专门针对制造业2021会议的特刊社论序言

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Hungarian Journal of Industry and Chemistry Pub Date : 2021-01-01 DOI: 10.33927/hjic-2021-12

I. Gyurika

引用次数: 0

Mechanical Deburring of Drilling-Induced Exit Burrs in Carbon Fibre Reinforced Polymer Composites 碳纤维增强聚合物复合材料钻削出口毛刺的机械去毛刺

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Hungarian Journal of Industry and Chemistry Pub Date : 2021-01-01 DOI: 10.33927/hjic-2021-20

András Gödri, A. Helle, N. Geier

{"title":"Mechanical Deburring of Drilling-Induced Exit Burrs in Carbon Fibre Reinforced Polymer Composites","authors":"András Gödri, A. Helle, N. Geier","doi":"10.33927/hjic-2021-20","DOIUrl":"https://doi.org/10.33927/hjic-2021-20","url":null,"abstract":"Carbon fibre reinforced polymer (CFRP) composites have excellent specific mechanical properties, which have contributed to the replacement of metallic structural components in high-tech sectors. However, the anisotropic and inhomogeneous properties of CFRPs render them difficult to cut. Burr is one of the main machining-induced macro-geometrical defects in CFRPs. Even though burr does not weaken the resultant strength of the composites (unlike delamination), its removal is time-consuming and costly. The main aim of the present paper is to investigate the efficiency of the mechanical deburring method. Deburring experiments were carried out on unidirectional CFRP, based on a full factorial experimental design using a special solid carbide cutting tool. The effects of feed and cutting speed were analysed using digital image processing and visual evaluation of high-resolution images. The experimental results show that the examined factors seem to have no significant effect on the results over the applied parameter range, because the exit burrs were successfully removed at each parameter setting. Furthermore, during the deburring process, the formation of a significant amount of chamfers was observed. Since the size of the chamfers depends on the size of delamination-induced material deformation and process control, it should be either compensated for or monitored in the future to develop a more reliable deburring process.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69557561","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}

引用次数: 0

Comparative Analysis of Burrs in UD-CFRP Composites Using Advanced Hole Machining Technologies 先进孔加工技术对UD-CFRP复合材料毛刺的对比分析

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Hungarian Journal of Industry and Chemistry Pub Date : 2021-01-01 DOI: 10.33927/hjic-2021-21

A. Helle, C. Pereszlai, András Gödri, N. Geier

{"title":"Comparative Analysis of Burrs in UD-CFRP Composites Using Advanced Hole Machining Technologies","authors":"A. Helle, C. Pereszlai, András Gödri, N. Geier","doi":"10.33927/hjic-2021-21","DOIUrl":"https://doi.org/10.33927/hjic-2021-21","url":null,"abstract":"Machining of carbon fibre reinforced polymer (CFRP) composites is challenging due to their inhomogeneous and anisotropic structure as well as the strong effect of the carbon fibres on wear. Burrs are critical machining-induced macro-geometrical defects in the case of the machining of CFRP composites, which may lead to assembly difficulties. Nowadays, although novel hole-machining technologies reduce the likelihood of burrs occurring, these technologies are often more costly and require longer machining times. The current experimental study focuses on the analysis of burrs induced by advanced hole machining technologies (helical milling, tilted helical milling and wobble milling) and comparison with a conventional one (conventional drilling).A total of 32 experiments were carried out in a VHTC 5-axis machining centre using uncoated solid carbide end mills. Furthermore, these technologies are compared and discussed based on the burrs experienced and average material removal rate (AMRR). Experimental results show that conventional drilling caused the lowest amount of burrs, followed by wobble milling, tilted helical milling and helical milling. Even though wobble milling is one of the most advantageous technologies in terms of burrs, the AMRR of conventional drilling is twenty times larger than that of wobble milling, therefore, the further development of wobble milling is recommended.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69557568","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}

引用次数: 0

Analysis of Formed Chips in the Case of Turning Different Polymer Materials 不同高分子材料车削成形切屑分析

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Hungarian Journal of Industry and Chemistry Pub Date : 2021-01-01 DOI: 10.33927/hjic-2021-25

Ádám Sarankó, G. Kalácska, R. Keresztes

引用次数: 0