In order to satisfy the material supply needs of large scale shop-floors and production systems, various logistics solutions are applied. In lean manufacturing enterprises, the material supply is pulled by the demands of manufacturing/assembly processes; therefore, a milkrun service is often applied to support the production without glitches. The milkrun logistics planning is a special case for vehicle routing problem (VRP), and requires effective approach to solution in order to satisfy various constraints, and minimize the cost of service. This study gives an overview about lean logistics as well as the most efficient VRP solver algorithms. Furthermore, a novel initial solution with generation heuristics is proposed, which is specially focused on flexible milkrun planning. In order to demonstrate the capabilities of the solution, a software environment is developed as a demonstration that focuses on the main industrial requirements of logistics planning like effective layout definition, quick response of the delivery service and effective order handling.
{"title":"Vehicle Routing Approach for Lean Shop-Floor Logistics","authors":"Dávid Gyulai, L. Monostori","doi":"10.1515/330","DOIUrl":"https://doi.org/10.1515/330","url":null,"abstract":"In order to satisfy the material supply needs of large scale shop-floors and production systems, various logistics solutions are applied. In lean manufacturing enterprises, the material supply is pulled by the demands of manufacturing/assembly processes; therefore, a milkrun service is often applied to support the production without glitches. The milkrun logistics planning is a special case for vehicle routing problem (VRP), and requires effective approach to solution in order to satisfy various constraints, and minimize the cost of service. This study gives an overview about lean logistics as well as the most efficient VRP solver algorithms. Furthermore, a novel initial solution with generation heuristics is proposed, which is specially focused on flexible milkrun planning. In order to demonstrate the capabilities of the solution, a software environment is developed as a demonstration that focuses on the main industrial requirements of logistics planning like effective layout definition, quick response of the delivery service and effective order handling.","PeriodicalId":13010,"journal":{"name":"Hungarian Journal of Industrial Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85634055","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}
A novel model-based fault detection and diagnosis method is proposed that is based on following event sequences measured in a discrete dynamic process. The model of the nominal and faulty operation modes is given in the form of event sequences, that are decomposed according to the components and sub-components present in the process system. The faulty event sequences are defined using extended procedure HAZID tables. A diagnostic algorithm is also presented that uses a component-wise decomposed form of the event sequences. The operation of the algorithm is illustrated on a simple example of a process system consisting of three similar tanks.
{"title":"A Structured Model-Based Diagnosis Method for Discrete Dynamic Processes Using Event Sequences","authors":"Attila Tóth, K. Hangos, A. Werner-Stark","doi":"10.1515/339","DOIUrl":"https://doi.org/10.1515/339","url":null,"abstract":"A novel model-based fault detection and diagnosis method is proposed that is based on following event sequences measured in a discrete dynamic process. The model of the nominal and faulty operation modes is given in the form of event sequences, that are decomposed according to the components and sub-components present in the process system. The faulty event sequences are defined using extended procedure HAZID tables. A diagnostic algorithm is also presented that uses a component-wise decomposed form of the event sequences. The operation of the algorithm is illustrated on a simple example of a process system consisting of three similar tanks.","PeriodicalId":13010,"journal":{"name":"Hungarian Journal of Industrial Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82327933","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}
Megameter-III is a special vehicle designed and constructed for international competitions by our team. A crucial part of the vehicle is the internal combustion engine, which ought to have extremely low fuel consumption. The experiences of previous competitions confirmed that it is necessary to develop a professional telemetry system, which allows tracking and logging online important parameters of the engine and the vehicle. In this paper, we discuss results for estimating of several parameters of the engine (angular velocity, angular acceleration, the Coulomb-Morin external friction torque and the damping constant). In our work, injector-pulses and inductive sensor’s signals were monitored.
{"title":"Estimation of Parameters for an Extremely Low Fuel Consumption Internal Combustion Engine-based Megameter-III Vehicle","authors":"István Pintér, Mihály Bagány","doi":"10.1515/335","DOIUrl":"https://doi.org/10.1515/335","url":null,"abstract":"Megameter-III is a special vehicle designed and constructed for international competitions by our team. A crucial part of the vehicle is the internal combustion engine, which ought to have extremely low fuel consumption. The experiences of previous competitions confirmed that it is necessary to develop a professional telemetry system, which allows tracking and logging online important parameters of the engine and the vehicle. In this paper, we discuss results for estimating of several parameters of the engine (angular velocity, angular acceleration, the Coulomb-Morin external friction torque and the damping constant). In our work, injector-pulses and inductive sensor’s signals were monitored.","PeriodicalId":13010,"journal":{"name":"Hungarian Journal of Industrial Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83114971","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}
Carbon dioxide is the air pollutant emitted in the greatest volume nowadays. Capturing and deposition of carbon dioxide require great financial effort. Spontaneous processes exist in nature that can be the basis of re-introducing CO2 into the biological system. A number of valuable products can be obtained including motor propellants. Nowadays petrol companies all over the world invest increasingly more funds into algae technology research, and there are researches going on in the energy, cosmetics, pharmaceutical, and food industry for marketable microalgae components. The viability of the technology is determined by its energy-needs which are mainly affected by the separation of the biomass from the reproduction medium. In this paper, we look into the circumstances as well as the effects of flocculationdensification and ultrafiltration on the algae suspension.
{"title":"SEPARATION METHODS IN THE ALGAE TECHNOLOGY","authors":"Z. Hodai, G. Horváth, L. Hanák, R. Bocsi","doi":"10.1515/310","DOIUrl":"https://doi.org/10.1515/310","url":null,"abstract":"Carbon dioxide is the air pollutant emitted in the greatest volume nowadays. Capturing and deposition of carbon dioxide require great financial effort. Spontaneous processes exist in nature that can be the basis of re-introducing CO2 into the biological system. A number of valuable products can be obtained including motor propellants. Nowadays petrol companies all over the world invest increasingly more funds into algae technology research, and there are researches going on in the energy, cosmetics, pharmaceutical, and food industry for marketable microalgae components. The viability of the technology is determined by its energy-needs which are mainly affected by the separation of the biomass from the reproduction medium. In this paper, we look into the circumstances as well as the effects of flocculationdensification and ultrafiltration on the algae suspension.","PeriodicalId":13010,"journal":{"name":"Hungarian Journal of Industrial Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77447880","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}
Glow discharge sources have been used for analytical purpose for several years. Recently the pulsed operation mode has gained an increasing importance. Operating the source in current-controlled mode instead of the traditional voltage-feed method may have the advantage of precise control of the source’s state and it provides a convenient way to study the relationship among the emitted line intensity and the key parameters of the plasma such as the pressure of the filling gas, the voltage-drop on the source as well as the current flowing through the device. In the following the brief description of the system, the relationship among the voltage drop on the source, the pressure of the filling gas (Ar), the current of the DC pulses as well as the line intensities are presented and discussed.
{"title":"Study of the Properties of a Plain Cathode Grimm-Type Dc Glow Discharge Source Operated in a Current-controlled Pulse Regime","authors":"O. Bánhidi","doi":"10.1515/349","DOIUrl":"https://doi.org/10.1515/349","url":null,"abstract":"Glow discharge sources have been used for analytical purpose for several years. Recently the pulsed operation mode has gained an increasing importance. Operating the source in current-controlled mode instead of the traditional voltage-feed method may have the advantage of precise control of the source’s state and it provides a convenient way to study the relationship among the emitted line intensity and the key parameters of the plasma such as the pressure of the filling gas, the voltage-drop on the source as well as the current flowing through the device. In the following the brief description of the system, the relationship among the voltage drop on the source, the pressure of the filling gas (Ar), the current of the DC pulses as well as the line intensities are presented and discussed.","PeriodicalId":13010,"journal":{"name":"Hungarian Journal of Industrial Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88322453","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}
Recently, the requirements for decreasing the tool costs have been increased in forging technologies. These costs could be decreased by increasing the lifetime of the tools. In hot-forming there is a new possibility to increase the lifetime, namely: Physical Vapour Deposition (PVD) coating of the tools. Participants in testing the effects of coating were the employees of the Universtiy Szechenyi Istvan, Raba Axle Ltd., Fraunhofer Institut fur Schicht- und Oberflachentechnik Braunschweig and Westsachsische Hochschule Zwickau. Lately, pre-upsetting used in production lines served by robots – as upsetting made between parallel pressure plates used frequently in die-forging – was used to make wear tests. In the wear tests, the friction work according to the energetic model was calculated by applying a kinematically admissible velocity field, which takes into account the friction coefficient and the local displacements. Expectable friction coefficient – using the results of previous researches – has been determined based on geometrical data of the pre-upset work-piece.
近年来，锻压工艺对降低刀具成本的要求越来越高。这些成本可以通过增加工具的使用寿命来降低。在热成形中，有一种新的增加寿命的可能性，即:工具的物理气相沉积(PVD)涂层。测试涂层效果的参与者是Szechenyi Istvan大学、Raba车轴有限公司、Fraunhofer Schicht- and Oberflachentechnik braunschweik和Westsachsische Hochschule Zwickau的员工。最近，在由机器人服务的生产线上使用的预镦粗——如模锻中经常使用的平行压力板之间的镦粗——被用于进行磨损试验。在磨损试验中，采用考虑摩擦系数和局部位移的运动允许速度场，根据能量模型计算摩擦功。根据预镦粗工件的几何数据，利用前人的研究结果确定了预期的摩擦系数。
{"title":"Pvd Coating and Up-to-date Wear Test of Hot-Forming Tools","authors":"F. Tancsics, E. Halbritter","doi":"10.1515/313","DOIUrl":"https://doi.org/10.1515/313","url":null,"abstract":"Recently, the requirements for decreasing the tool costs have been increased in forging technologies. These costs could be decreased by increasing the lifetime of the tools. In hot-forming there is a new possibility to increase the lifetime, namely: Physical Vapour Deposition (PVD) coating of the tools. Participants in testing the effects of coating were the employees of the Universtiy Szechenyi Istvan, Raba Axle Ltd., Fraunhofer Institut fur Schicht- und Oberflachentechnik Braunschweig and Westsachsische Hochschule Zwickau. Lately, pre-upsetting used in production lines served by robots – as upsetting made between parallel pressure plates used frequently in die-forging – was used to make wear tests. In the wear tests, the friction work according to the energetic model was calculated by applying a kinematically admissible velocity field, which takes into account the friction coefficient and the local displacements. Expectable friction coefficient – using the results of previous researches – has been determined based on geometrical data of the pre-upset work-piece.","PeriodicalId":13010,"journal":{"name":"Hungarian Journal of Industrial Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78299743","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 main advantage of hybrid vehicles and their electric drive systems that they reduce local pollutant emissions – especially in urban usage. The vehicle called E-VAN-09 was developed at Szechenyi Istvan University which serves understanding and optimization potential of operational processes.
{"title":"COMPUTER AIDED MODELLING OF HYBRID MINI VAN","authors":"I. Lakatos, V. Nagy, P. Kőrös, T. Orbán","doi":"10.1515/319","DOIUrl":"https://doi.org/10.1515/319","url":null,"abstract":"The main advantage of hybrid vehicles and their electric drive systems that they reduce local pollutant emissions – especially in urban usage. The vehicle called E-VAN-09 was developed at Szechenyi Istvan University which serves understanding and optimization potential of operational processes.","PeriodicalId":13010,"journal":{"name":"Hungarian Journal of Industrial Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81248404","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}
A. Vazid, V. Urvashi, K. Jyotsna, S. A. Faroun, I. Mohd
Physico-chemical properties and optical characterization of synthesized polyol explores the possibility to understand the mechanism and controlling the reaction parameters in a suitable manner during the production of polyurethane products. Castor (Ricinus Communis) is generally grown for its oil yielding seeds, which contains ricinoleic acid and only the oil with hydroxyl group in molecular structure due to this castor oil can be exploited as modified polyol. In the present study, castor oil has been modified with blending phenolic resin and reacted with diethanolamine (DEA) and diethyleneglycol (DEG) to synthesize the polyol. Various physico-chemical properties of synthesized polyol such as acid value, OH value, and moisture content have been measured. UV-VIS, FTIR and NMR spectroscopic studies of the synthesized castor oil based polyol are carried out. Optical properties such as absorption coefficient (α), extinction coefficient (k) and optical band gap (Eg) of polyols were determined. FTIR studies show the information of changes in the functional group with changing concentration of diethanolamine (DEA), diethyleneglycol (DEG), and phenolic resin (Ph. resin). Infrared spectroscopy (IR) is used to understand the characterization worth with suitable standards in view of chemical and structural characterization of synthesized polyol.
{"title":"Synthesis, Physico-Chemical Properties, and Spectroscopic Characterization of Phenolic Modified Castor Oil Based Polyol","authors":"A. Vazid, V. Urvashi, K. Jyotsna, S. A. Faroun, I. Mohd","doi":"10.1515/315","DOIUrl":"https://doi.org/10.1515/315","url":null,"abstract":"Physico-chemical properties and optical characterization of synthesized polyol explores the possibility to understand the mechanism and controlling the reaction parameters in a suitable manner during the production of polyurethane products. Castor (Ricinus Communis) is generally grown for its oil yielding seeds, which contains ricinoleic acid and only the oil with hydroxyl group in molecular structure due to this castor oil can be exploited as modified polyol. In the present study, castor oil has been modified with blending phenolic resin and reacted with diethanolamine (DEA) and diethyleneglycol (DEG) to synthesize the polyol. Various physico-chemical properties of synthesized polyol such as acid value, OH value, and moisture content have been measured. UV-VIS, FTIR and NMR spectroscopic studies of the synthesized castor oil based polyol are carried out. Optical properties such as absorption coefficient (α), extinction coefficient (k) and optical band gap (Eg) of polyols were determined. FTIR studies show the information of changes in the functional group with changing concentration of diethanolamine (DEA), diethyleneglycol (DEG), and phenolic resin (Ph. resin). Infrared spectroscopy (IR) is used to understand the characterization worth with suitable standards in view of chemical and structural characterization of synthesized polyol.","PeriodicalId":13010,"journal":{"name":"Hungarian Journal of Industrial Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88883743","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}
A review of all magnetorheological brake types was presented. Based on overall braking torque analytical comparison for all magnetorheological brake types and other relevant parameters, the most promising design was selected. A test rig, utilizing selected brake type filled with magnetorheological fluid – Basonetic 5030 was manufactured and then tested. To analyze the effect produced by magnetic field on magnetorheological fluid and hence at overall braking torque, the authors used amplification factor. Results were discussed and the magnetic field efficiency improvements were proposed.
{"title":"Magnetorheological Fluid Brake – Basic Performances Testing with Magnetic Field Efficiency Improvement Proposal","authors":"A. Poznić, A. Zelić, L. Szabó","doi":"10.1515/351","DOIUrl":"https://doi.org/10.1515/351","url":null,"abstract":"A review of all magnetorheological brake types was presented. Based on overall braking torque analytical comparison for all magnetorheological brake types and other relevant parameters, the most promising design was selected. A test rig, utilizing selected brake type filled with magnetorheological fluid – Basonetic 5030 was manufactured and then tested. To analyze the effect produced by magnetic field on magnetorheological fluid and hence at overall braking torque, the authors used amplification factor. Results were discussed and the magnetic field efficiency improvements were proposed.","PeriodicalId":13010,"journal":{"name":"Hungarian Journal of Industrial Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87296588","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}
Bio-paraffin containing mixtures produced from different natural triglycerides (conventional and improved vegetable oils, used cooking oils and fats, etc.) have high cetane number (95-105 units), but their freezing points are high (between +15 and +32°C). This property can be improved by catalytic hydroisomerization. Products obtained over 0.5% Pt/SAPO-11 catalysts (T = 280–380°C; P = 20–80 bar; LHSV = 0.25–4.0 h-1; apparent contact time: between 1/3 and 4.0 h (at LHSV = 3.0 h-1; H2/feedstock = 400 Nm3/m3) had CFPP values of +5°C; -20°C and -32°C. At the same time, there was decreased cetane number of the isomerates (87, 70 and 65 unit, respectively) relative to the feedstock. These biogasoils are suitable for bio-components of premium quality diesel fuel or for the improvement of cetane number. They can also reduce the density of low grade components providing some economic savings and some flexibility to refineries.
{"title":"Application of Improved Bio-Paraffins in Diesel Fuels","authors":"T. Kasza, C. Tóth, J. Hancsók","doi":"10.1515/314","DOIUrl":"https://doi.org/10.1515/314","url":null,"abstract":"Bio-paraffin containing mixtures produced from different natural triglycerides (conventional and improved vegetable oils, used cooking oils and fats, etc.) have high cetane number (95-105 units), but their freezing points are high (between +15 and +32°C). This property can be improved by catalytic hydroisomerization. Products obtained over 0.5% Pt/SAPO-11 catalysts (T = 280–380°C; P = 20–80 bar; LHSV = 0.25–4.0 h-1; apparent contact time: between 1/3 and 4.0 h (at LHSV = 3.0 h-1; H2/feedstock = 400 Nm3/m3) had CFPP values of +5°C; -20°C and -32°C. At the same time, there was decreased cetane number of the isomerates (87, 70 and 65 unit, respectively) relative to the feedstock. These biogasoils are suitable for bio-components of premium quality diesel fuel or for the improvement of cetane number. They can also reduce the density of low grade components providing some economic savings and some flexibility to refineries.","PeriodicalId":13010,"journal":{"name":"Hungarian Journal of Industrial Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90416333","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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