In this study, the main elements of a hydrostatic regenerative braking system have been modeled. The model which has been created, the elements in the system and the relationship of the system with the vehicle has been studied. In order to measure the performance of the regenerative system, driving cycles for accelerating and stopping the vehicle using only the hydraulic system have been simulated. Simulation studies have indicated that by using this system, a vehicle such as a heavy truck can be accelerated up to 4m/s velocity and moved more than 100m. The energy needed for this motion can again be stored by the regenerative braking system. Results indicate that accumulator can be fully charged in seconds with initial speed of 15 m/s. This model can be used in determining hydraulic elements that can be used in experimental studies. The calculation of losses is also planned to be incorporated to the model in the future.
{"title":"Modeling the Vehicle Movement and Braking Effect of the Hydrostatic Regenerative Braking System","authors":"M. Karaman, S. Korucu","doi":"10.29228/eng.pers.69826","DOIUrl":"https://doi.org/10.29228/eng.pers.69826","url":null,"abstract":"In this study, the main elements of a hydrostatic regenerative braking system have been modeled. The model which has been created, the elements in the system and the relationship of the system with the vehicle has been studied. In order to measure the performance of the regenerative system, driving cycles for accelerating and stopping the vehicle using only the hydraulic system have been simulated. Simulation studies have indicated that by using this system, a vehicle such as a heavy truck can be accelerated up to 4m/s velocity and moved more than 100m. The energy needed for this motion can again be stored by the regenerative braking system. Results indicate that accumulator can be fully charged in seconds with initial speed of 15 m/s. This model can be used in determining hydraulic elements that can be used in experimental studies. The calculation of losses is also planned to be incorporated to the model in the future.","PeriodicalId":234309,"journal":{"name":"Engineering Perspective","volume":"411 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124388951","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":"Investigation of Natural Frequency Values of Composite Cover Design with Different Laying Angles","authors":"Mehmet Can Katmer, A. Akkurt, T. Kocakulak","doi":"10.29228/eng.pers.66826","DOIUrl":"https://doi.org/10.29228/eng.pers.66826","url":null,"abstract":"","PeriodicalId":234309,"journal":{"name":"Engineering Perspective","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127943675","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}
Prestressed concrete sleepers play an essential role in the railway track’s performance and safety responses, having an important function of transferring and distributing loads from the track’s superstructure to ballast bed. Cracks on the prestressed concrete sleepers are mainly caused by impact loadings form wheel and rail interactions. Thus, the excessive railway track maintenance cost. The effect and optimization of different prestressed sleeper shape under static and impact loadings has not been previously well investigated. Therefore, this paper focused on the optimization of prestressed concrete sleepers (PCS) shape looking at sleeper safety and sleeper volume. ANSYS 16 was used to analyze the static and impact loading on sleepers. The concrete part of the sleeper was modelled using a three-dimensional solid element, SOLID65 and the pre-stressing wires by truss elements, LINK180, to withstand the initial strain attributed to pre-stressing forces. This paper revealed that irregular hexagon sleeper shape with different width at rail seat and center section having 251 mm and 175 mm center width and height respectively; 281 mm and 200 mm end and rail seat width and height respectively is safe. This paper; thus, point out to irregular hexagonal shape sleeper are more economical and safe unlike the other modelled shapes.
{"title":"Optimization of concrete sleepers subjected to static and impact loadings","authors":"Ndabamenye Theogene","doi":"10.29228/eng.pers.52117","DOIUrl":"https://doi.org/10.29228/eng.pers.52117","url":null,"abstract":"Prestressed concrete sleepers play an essential role in the railway track’s performance and safety responses, having an important function of transferring and distributing loads from the track’s superstructure to ballast bed. Cracks on the prestressed concrete sleepers are mainly caused by impact loadings form wheel and rail interactions. Thus, the excessive railway track maintenance cost. The effect and optimization of different prestressed sleeper shape under static and impact loadings has not been previously well investigated. Therefore, this paper focused on the optimization of prestressed concrete sleepers (PCS) shape looking at sleeper safety and sleeper volume. ANSYS 16 was used to analyze the static and impact loading on sleepers. The concrete part of the sleeper was modelled using a three-dimensional solid element, SOLID65 and the pre-stressing wires by truss elements, LINK180, to withstand the initial strain attributed to pre-stressing forces. This paper revealed that irregular hexagon sleeper shape with different width at rail seat and center section having 251 mm and 175 mm center width and height respectively; 281 mm and 200 mm end and rail seat width and height respectively is safe. This paper; thus, point out to irregular hexagonal shape sleeper are more economical and safe unlike the other modelled shapes.","PeriodicalId":234309,"journal":{"name":"Engineering Perspective","volume":"520 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123074384","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":"Modeling of an Electric Bus Using MATLAB/Simulink and Determining Cost Saving for a Realistic City Bus Line Driving Cycle","authors":"Og̃uzhan Karakaş, Umut Buğra Şeker, H. Solmaz","doi":"10.29228/eng.pers.51422","DOIUrl":"https://doi.org/10.29228/eng.pers.51422","url":null,"abstract":"","PeriodicalId":234309,"journal":{"name":"Engineering Perspective","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132053911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With the increase in global energy demand, air pollution becoming uncontrollable does not fall off the agenda. It is inevitable to use and spread of renewable energy sources to make energy production cleaner, more reliable and sustainable. In studies for this purpose, the use of fuel cell systems comes to the forefront thanks to its many advantages. The use of hybrid systems is becoming more common day by day in order to minimize the efficiency losses that may occur in the energy production, use and waste management process, to ensure energy reliability and to prevent systemic problems. In this study, hybrid systems created with fuel cells are discussed in detail, and examined under three main headings: hybrid systems created with renewable energy sources, created with storage devices, and created for energy recovery. It has been observed that the main purpose of hybrid systems created with renewable energy sources is to ensure energy reliability. In addition, the electrical energy required for the electrolysis of hydrogen used as fuel in fuel cells can be provided by photovoltaic panels or wind turbines, thus eliminating fuel storage and transportation problems. In hybrid systems created with storage devices, it is aimed to prevent instantaneous interruptions in the system by meeting the instantaneous power needed by the system and successful results have been achieved. In the hybrid systems created for energy recovery, it has been seen that it is possible to recover the heat and unburned fuel energy released from the fuel cell with thermophotovoltaic cells, gas turbines and heat exchangers.
{"title":"Investigation of the use of fuel cell hybrid systems for different purposes","authors":"T. Kocakulak, Turan Alp Arslan","doi":"10.29228/eng.pers.68466","DOIUrl":"https://doi.org/10.29228/eng.pers.68466","url":null,"abstract":"With the increase in global energy demand, air pollution becoming uncontrollable does not fall off the agenda. It is inevitable to use and spread of renewable energy sources to make energy production cleaner, more reliable and sustainable. In studies for this purpose, the use of fuel cell systems comes to the forefront thanks to its many advantages. The use of hybrid systems is becoming more common day by day in order to minimize the efficiency losses that may occur in the energy production, use and waste management process, to ensure energy reliability and to prevent systemic problems. In this study, hybrid systems created with fuel cells are discussed in detail, and examined under three main headings: hybrid systems created with renewable energy sources, created with storage devices, and created for energy recovery. It has been observed that the main purpose of hybrid systems created with renewable energy sources is to ensure energy reliability. In addition, the electrical energy required for the electrolysis of hydrogen used as fuel in fuel cells can be provided by photovoltaic panels or wind turbines, thus eliminating fuel storage and transportation problems. In hybrid systems created with storage devices, it is aimed to prevent instantaneous interruptions in the system by meeting the instantaneous power needed by the system and successful results have been achieved. In the hybrid systems created for energy recovery, it has been seen that it is possible to recover the heat and unburned fuel energy released from the fuel cell with thermophotovoltaic cells, gas turbines and heat exchangers.","PeriodicalId":234309,"journal":{"name":"Engineering Perspective","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125056598","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":"Review of semi-active suspension based on Magneto-rheological damper","authors":"M. Josee","doi":"10.29228/eng.pers.50853","DOIUrl":"https://doi.org/10.29228/eng.pers.50853","url":null,"abstract":"","PeriodicalId":234309,"journal":{"name":"Engineering Perspective","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131384139","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}
Turan Alp Arslan, Faruk Emre Aysal, I. Çelik, H. Bayrakçeken, T. Öztürk
{"title":"Quarter Car Active Suspension System Control Using Fuzzy Controller","authors":"Turan Alp Arslan, Faruk Emre Aysal, I. Çelik, H. Bayrakçeken, T. Öztürk","doi":"10.29228/eng.pers.66798","DOIUrl":"https://doi.org/10.29228/eng.pers.66798","url":null,"abstract":"","PeriodicalId":234309,"journal":{"name":"Engineering Perspective","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125058047","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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