Sabrina Handayani, Dessy Angga Afriyanti, Egista Wima Al Fauzi
Kendal Regency has problems with passenger bus station services in the transportation sector. Integrating components in Sukorejo Type B Bus Station includes crossing circulation patterns between people and vehicles. The crossing can cause conflicts that endanger the safety of service users. This study aimed to handle circulation conflicts through the integration of the components applied in the Sukorejo Type B Bus Station can be optimal. This study used a methodological approach such as quantitative, explanation, and planning, referring to the field results and observational surveys. This research used 135 respondents of inter-city transportation within the province (AKDP) and 147 respondents of rural transportation (ANGDES). The results showed the integration performance between the components of the Sukorejo Type B Bus Station through the Normalized Score, which got a value of -100 with good information and indicated by the total circulation distance needed to reach each bus station component in 452 meters for 342 seconds. In Bus Station Type B Sukorejo, circulation crossings caused conflict at as many as 10 points due to the pedestrian crossing activities in private vehicle parking, arrival areas, waiting areas, and public transport departures. The research value of PV2 < 108 meant the need for pedestrian facilities indicated that it was not necessary to handle circulation crossings with pedestrian facilities. It was just sufficient to provide pedestrian warning signs to cross, so that vehicle drivers could be careful in crossing each conflict point.
肯德尔区在交通部门的客运汽车站服务方面存在问题。Sukorejo B 型公交车站的集成组件包括人车之间的交叉通行模式。这种交叉可能会导致冲突，危及服务使用者的安全。本研究旨在通过整合苏科雷乔 B 型汽车站中应用的组件，以最佳方式处理流通冲突。本研究采用了定量、解释和规划等方法，并参考了实地结果和观察调查。本研究使用了 135 名省内城市间交通（AKDP）的受访者和 147 名农村交通（ANGDES）的受访者。研究结果通过归一化得分（Normalized Score）显示了苏科雷乔 B 型公交车站各组成部分之间的整合性能，该得分值为-100，表示信息良好，并以到达每个公交车站组成部分所需的总循环距离（452 米，342 秒）来表示。在 B 型 Sukorejo 公交车站，由于私家车停车场、到站区、候车区和公共交通发车区的人行横道活动，造成多达 10 个点的人行横道冲突。研究值 PV2 < 108 意味着对行人设施的需求表明，没有必要用行人设施来处理循环过街通道。設置行人過路警告牌，讓車輛司機小心駛過每個衝突點，便已足夠。
{"title":"INTEGRATION PLANNING BETWEEN COMPONENTS OF TYPE B BUS STATION SUKOREJO","authors":"Sabrina Handayani, Dessy Angga Afriyanti, Egista Wima Al Fauzi","doi":"10.5937/jaes0-45719","DOIUrl":"https://doi.org/10.5937/jaes0-45719","url":null,"abstract":"Kendal Regency has problems with passenger bus station services in the transportation sector. Integrating components in Sukorejo Type B Bus Station includes crossing circulation patterns between people and vehicles. The crossing can cause conflicts that endanger the safety of service users. This study aimed to handle circulation conflicts through the integration of the components applied in the Sukorejo Type B Bus Station can be optimal. This study used a methodological approach such as quantitative, explanation, and planning, referring to the field results and observational surveys. This research used 135 respondents of inter-city transportation within the province (AKDP) and 147 respondents of rural transportation (ANGDES). The results showed the integration performance between the components of the Sukorejo Type B Bus Station through the Normalized Score, which got a value of -100 with good information and indicated by the total circulation distance needed to reach each bus station component in 452 meters for 342 seconds. In Bus Station Type B Sukorejo, circulation crossings caused conflict at as many as 10 points due to the pedestrian crossing activities in private vehicle parking, arrival areas, waiting areas, and public transport departures. The research value of PV2 < 108 meant the need for pedestrian facilities indicated that it was not necessary to handle circulation crossings with pedestrian facilities. It was just sufficient to provide pedestrian warning signs to cross, so that vehicle drivers could be careful in crossing each conflict point.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140232421","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}
Jean Mario Valentino, Agus Sigit Pramono, A. Syaifudin, Helena Kis Agustin, L. Shalahuddin, A. Windharto, Katsuhiko Sasaki
Coupling links and hooked plates constitute the primary components of automatic couplers in trains, enduring substantial tensile and compressive loads during train connections. This study endeavours to enhance the strength of S45C material through heat treatment techniques. The research commenced with the preparation of JIS S45C tensile test specimens adhering to ASTM E8 standards. The material's chemical composition was validated using an Optical Emission Spectrometer (OES). Six heat treatment variations were employed, including quench oil without tempering (QO), quenching water without tempering (QW), quenching oil tempered at 660°C (QOT660), quenching water tempered at 660°C (QWT660), quenching oil tempered at 550°C (QOT550), quenching water tempered at 550°C (QWT550), alongside untreated conditions (NT) for comparison. The efficacy of heat treatment was evaluated through tensile testing, optical metallographic analysis, and micro-Vickers hardness tests. QO and QW scenarios were excluded from the tensile tests. Results revealed that QWT550 demonstrated the most substantial enhancement in material yield, exhibiting a 115% increase. Moreover, hardness testing indicated superior hardness in QWT550 specimens compared to other tempered variants. The metallographic analysis illustrated the formation of identical and smooth martensitic structures. Overall, the combination of cooling heat treatment and tempering proved sufficient to meet the design requirements of hooked plates and coupling links for automatic couplers.
{"title":"ENHANCING S45C STEEL FOR THE PRIMARY COMPONENT OF AN AUTOMATIC COUPLER USING QUENCH-TEMPERING TECHNIQUES","authors":"Jean Mario Valentino, Agus Sigit Pramono, A. Syaifudin, Helena Kis Agustin, L. Shalahuddin, A. Windharto, Katsuhiko Sasaki","doi":"10.5937/jaes0-43988","DOIUrl":"https://doi.org/10.5937/jaes0-43988","url":null,"abstract":"Coupling links and hooked plates constitute the primary components of automatic couplers in trains, enduring substantial tensile and compressive loads during train connections. This study endeavours to enhance the strength of S45C material through heat treatment techniques. The research commenced with the preparation of JIS S45C tensile test specimens adhering to ASTM E8 standards. The material's chemical composition was validated using an Optical Emission Spectrometer (OES). Six heat treatment variations were employed, including quench oil without tempering (QO), quenching water without tempering (QW), quenching oil tempered at 660°C (QOT660), quenching water tempered at 660°C (QWT660), quenching oil tempered at 550°C (QOT550), quenching water tempered at 550°C (QWT550), alongside untreated conditions (NT) for comparison. The efficacy of heat treatment was evaluated through tensile testing, optical metallographic analysis, and micro-Vickers hardness tests. QO and QW scenarios were excluded from the tensile tests. Results revealed that QWT550 demonstrated the most substantial enhancement in material yield, exhibiting a 115% increase. Moreover, hardness testing indicated superior hardness in QWT550 specimens compared to other tempered variants. The metallographic analysis illustrated the formation of identical and smooth martensitic structures. Overall, the combination of cooling heat treatment and tempering proved sufficient to meet the design requirements of hooked plates and coupling links for automatic couplers.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140234088","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}
D. Darmadi, N. Teguh, L. Yuliati, Eko Siswanto, Marco Talice
The primary-secondary air ratio is believed to impact both the combustion process and the overall performance of a power plant. This study aims to investigate how an increase in the primary-secondary air ratio affects the performance of a power plant located in north Gorontalo, South Sulawesi, Indonesia, using a GateCycle model. We conducted simulations of 48 variations based on three primary-secondary ratio values (PA-SA) to determine the optimal proportion of PA-SA. Our findings indicate that the optimal PA-SA ratio under stoichiometric conditions was 25-75%, resulting in a total cost of 108.03 million Rupiah per hour with a fuel burn rate of 22756 kg/h. When operating with 10% excess air, the optimal PA-SA ratio remains 25-75%, and the fuel flow and total cost were 22947 kg/h and 108.94 million Rupiah, respectively. Similarly, under 20% excess air, the optimal PA-SA ratio was also 25-75%, with a fuel flow rate and total cost of 23144 kg/h and 109.87 million Rupiah, respectively.
{"title":"COMBINED IMPACT OF PRIMARY-SECONDARY RATIO AND EXCESS AIR ON COAL-FIRED POWER PLANT PERFORMANCE","authors":"D. Darmadi, N. Teguh, L. Yuliati, Eko Siswanto, Marco Talice","doi":"10.5937/jaes0-44064","DOIUrl":"https://doi.org/10.5937/jaes0-44064","url":null,"abstract":"The primary-secondary air ratio is believed to impact both the combustion process and the overall performance of a power plant. This study aims to investigate how an increase in the primary-secondary air ratio affects the performance of a power plant located in north Gorontalo, South Sulawesi, Indonesia, using a GateCycle model. We conducted simulations of 48 variations based on three primary-secondary ratio values (PA-SA) to determine the optimal proportion of PA-SA. Our findings indicate that the optimal PA-SA ratio under stoichiometric conditions was 25-75%, resulting in a total cost of 108.03 million Rupiah per hour with a fuel burn rate of 22756 kg/h. When operating with 10% excess air, the optimal PA-SA ratio remains 25-75%, and the fuel flow and total cost were 22947 kg/h and 108.94 million Rupiah, respectively. Similarly, under 20% excess air, the optimal PA-SA ratio was also 25-75%, with a fuel flow rate and total cost of 23144 kg/h and 109.87 million Rupiah, respectively.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140235649","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}
Industrial wheels are heavily loaded components that undergo severe cyclic stress conditions. Thus, the design of the rims must include a wide fatigue study which articulates in laboratory and field tests, analytical and numerical analyses and comparison of the experimental and computational results. This paper presents the study approach applied in the study of a 25 in rim for earth-moving machines manufactured by Moveero. The rim was subject to a design update which provided the reduction of the thickness from 11 mm to 9 mm. We decided to study the interaction tire-rim because it’s a critical zone. The failures affected the area of the seat radius of the fixed flange of the rim, which resulted to be the most stressed part of the rim because of the bending actions of the tire on the flange. In order to deepen the cyclic mechanical behaviour of the component, laboratory inflation and rolling tests were carried out in Woodridge USA considering several combinations of inflation pressure and radial load applied to the wheel. The strain data from the tests were analysed to develop a reverse empirical model for the contact pressure between tire and rim. Once the load diagram applied to the flange for each test was estimated, FEM static simulations could be performed on a 3D model of the rim through SolidWorks Simulation. The stress fields obtained were then used for fatigue FEM numerical analyses which could return an evaluation of the predicted life of the component under several load conditions.
{"title":"DEVELOPMENT OF A FEM PROCEDURE FOR EVALUATING THE PRESSURE PROFILE IN THE INDUSTRIAL WHEEL AND FATIGUE STRENGTH ANALYSES","authors":"Luigi Solazzi, Nicola Danzi, M. Cima","doi":"10.5937/jaes0-48184","DOIUrl":"https://doi.org/10.5937/jaes0-48184","url":null,"abstract":"Industrial wheels are heavily loaded components that undergo severe cyclic stress conditions. Thus, the design of the rims must include a wide fatigue study which articulates in laboratory and field tests, analytical and numerical analyses and comparison of the experimental and computational results. This paper presents the study approach applied in the study of a 25 in rim for earth-moving machines manufactured by Moveero. The rim was subject to a design update which provided the reduction of the thickness from 11 mm to 9 mm. We decided to study the interaction tire-rim because it’s a critical zone. The failures affected the area of the seat radius of the fixed flange of the rim, which resulted to be the most stressed part of the rim because of the bending actions of the tire on the flange. In order to deepen the cyclic mechanical behaviour of the component, laboratory inflation and rolling tests were carried out in Woodridge USA considering several combinations of inflation pressure and radial load applied to the wheel. The strain data from the tests were analysed to develop a reverse empirical model for the contact pressure between tire and rim. Once the load diagram applied to the flange for each test was estimated, FEM static simulations could be performed on a 3D model of the rim through SolidWorks Simulation. The stress fields obtained were then used for fatigue FEM numerical analyses which could return an evaluation of the predicted life of the component under several load conditions.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140235437","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 purpose of the research in the article is to obtain analytical and experimental results on the purification of internal combustion engine exhaust gases by an electric pulse, allowing us to determine the main parameters of the muffler operation. The set goal was achieved by performing the following methodology. A mathematical model of the motion of a gas particle in a muffler has been developed and investigated, the relationship between the capacity of the engine combustion chamber, the number of revolutions of the crankshaft, the pulse intensity, and the dynamic viscosity of the medium has been established. The condition of the muffler operation is determined through the parameter – the distance between the electrodes. The optimality criterion is justified – the smokiness of the gas before and after purification. A nonlinear experimental plan has been compiled using the methods of similarity theory and dimension analysis. An experimental stand has been developed and results linking the process parameters have been obtained. The results obtained are the basis for the methodology for calculating the design of electric pulse mufflers with optimal smoke ratios.
{"title":"ESTABLISHING THE PARAMETERS OF THE OPERATION MODE OF THE ELECTRIC PULSE AUTOMOBILE MUFFLER","authors":"A. Kukesheva, Adil Kadyrov, Yevgeniy Kryuchkov","doi":"10.5937/jaes0-45196","DOIUrl":"https://doi.org/10.5937/jaes0-45196","url":null,"abstract":"The purpose of the research in the article is to obtain analytical and experimental results on the purification of internal combustion engine exhaust gases by an electric pulse, allowing us to determine the main parameters of the muffler operation. The set goal was achieved by performing the following methodology. A mathematical model of the motion of a gas particle in a muffler has been developed and investigated, the relationship between the capacity of the engine combustion chamber, the number of revolutions of the crankshaft, the pulse intensity, and the dynamic viscosity of the medium has been established. The condition of the muffler operation is determined through the parameter – the distance between the electrodes. The optimality criterion is justified – the smokiness of the gas before and after purification. A nonlinear experimental plan has been compiled using the methods of similarity theory and dimension analysis. An experimental stand has been developed and results linking the process parameters have been obtained. The results obtained are the basis for the methodology for calculating the design of electric pulse mufflers with optimal smoke ratios.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140235096","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}
Transient displacement of laminated plates under combined load based on Mantari’ s displacement field are investigated. The solution is implemented under transient mechanical load (sinusoidal, step and triangular sinusoidal distributed pressures pulse) and thermal buckling for plates with different layer orientation and thickness ratio. Equations of motion based on higher-order theory are derived through Hamilton’s principle, and solved using Navier-type solution for simply supported laminated plates. The results are presented for many effective parameters such as the number of laminate and orientation on the dynamic response of plates. Results show the validity of this displacement field in studying response of laminated thick and thin plates under varied transient loading and design parameters.
{"title":"TRANSIENT ANALYSIS OF LAMINATED PLATES IN THERMAL ENVIRONMENT","authors":"W. Majeed, I. Sadiq","doi":"10.5937/jaes0-43714","DOIUrl":"https://doi.org/10.5937/jaes0-43714","url":null,"abstract":"Transient displacement of laminated plates under combined load based on Mantari’ s displacement field are investigated. The solution is implemented under transient mechanical load (sinusoidal, step and triangular sinusoidal distributed pressures pulse) and thermal buckling for plates with different layer orientation and thickness ratio. Equations of motion based on higher-order theory are derived through Hamilton’s principle, and solved using Navier-type solution for simply supported laminated plates. The results are presented for many effective parameters such as the number of laminate and orientation on the dynamic response of plates. Results show the validity of this displacement field in studying response of laminated thick and thin plates under varied transient loading and design parameters.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140234631","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}
Kuanysh Alipbayev, Konstantin Ivanov, Aidos Sultan, Arman Komekbayev
Currently, research related to the automation of processes, systems and devices are of high relevance in the scientific and technical field: in the aerospace industry, robotics and electric transport technology. Successful automation of facilities and processes requires simplified control systems, and an adaptive mechanical system operates without a control system, which increases its reliability and efficiency. In particular, the creation of an efficient and reliable transmission of electric autonomous and mobile vehicles can be achieved by an adaptive mechanical drive with two degrees of freedom. Adaptation of the two-mobile system (2-DoF) is achieved by the proposed completely new type of transmission, namely the design of a stepless multi-speed drive with an additional friction coupling. The property of reliable adaptation of a two-mobile self-adjusting mechanical drive is independent adaptability to an external load with the help of a balancing friction coupling that provides a connection between the frictional moment and the relative angular velocity. The article presents a study of the interaction of the parameters of a two- mobile system in order to improve the efficiency of a self-adjusting adaptive drive with a given wide range of regulation based on the use of a friction coupling.
{"title":"RESEARCH AND DESIGN OF AN EFFICIENT ADAPTIVE DRIVE WITH BALANCING FRICTION COUPLING","authors":"Kuanysh Alipbayev, Konstantin Ivanov, Aidos Sultan, Arman Komekbayev","doi":"10.5937/jaes0-44991","DOIUrl":"https://doi.org/10.5937/jaes0-44991","url":null,"abstract":"Currently, research related to the automation of processes, systems and devices are of high relevance in the scientific and technical field: in the aerospace industry, robotics and electric transport technology. Successful automation of facilities and processes requires simplified control systems, and an adaptive mechanical system operates without a control system, which increases its reliability and efficiency. In particular, the creation of an efficient and reliable transmission of electric autonomous and mobile vehicles can be achieved by an adaptive mechanical drive with two degrees of freedom. Adaptation of the two-mobile system (2-DoF) is achieved by the proposed completely new type of transmission, namely the design of a stepless multi-speed drive with an additional friction coupling. The property of reliable adaptation of a two-mobile self-adjusting mechanical drive is independent adaptability to an external load with the help of a balancing friction coupling that provides a connection between the frictional moment and the relative angular velocity. The article presents a study of the interaction of the parameters of a two- mobile system in order to improve the efficiency of a self-adjusting adaptive drive with a given wide range of regulation based on the use of a friction coupling.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140246419","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}
In order to improve the energy efficiency of the vehicle fleets, many countries have introduced laws, regulations and politics that encourage the use of vehicles with lower fuel consumption and lower emissions of harmful gases. Also, many companies have adopted strategies for lowering emissions of harmful gases, maintenance costs and vehicle exploitation, including the use of software packages for operation management and maintenance of vehicle fleets. On the international market there are numerous of already made software packages for the operation management and maintenance of vehicle fleets. Some of the companies, having in mind the specificity of business or vehicle exploitation, have decided to develop their own software packages for operation management and maintenance of vehicle fleets. One of them is the company „SRBOLAB“ DOO. This paper analyzed the impact of the developed software package on the energy efficiency of the company's vehicle fleet. Firstly, it describes the structure of the developed software package, and after that, applied measures next to the software package, in order to improve energy efficiency and obtained results in the form of an analysis of the energy efficiency of the observed vehicle fleet before and after the implementation of software and measures. Analysis has shown that, regardless of the increased business, the total fuel consumption (l) and mileage (km) are higher after the implementation of software, as well as the energy efficiency of the observed vehicle fleet per CE groups which is reduced to specific fuel consumption (l/100km). Obtained results show that the differences in the specific fuel consumption (l/100km), before and after the implementation of software per CE groups, are in the range of 0,32 l/100km to 1,26 l/100km, in other words, fuel savings are from 4,1 % to 16,8%, if you look at this in percentages. Obtained results in comparison to the size, spent fuel (l), are showing savings in the range of 89 l to 342 l. Total fuel savings (l) for the observed vehicle fleet in the period of January to April 2023 is 626 l.
{"title":"IMPACT OF DEVELOPED SOFTWARE PACKAGE APPLICATION FOR THE OPERATION AND MAINTENANCE MANAGEMENT ON IMPROVING THE VEHICLE FLEET ENERGY EFFICIENCY","authors":"Nikola Petrović, D. Vujanovic","doi":"10.5937/jaes0-47972","DOIUrl":"https://doi.org/10.5937/jaes0-47972","url":null,"abstract":"In order to improve the energy efficiency of the vehicle fleets, many countries have introduced laws, regulations and politics that encourage the use of vehicles with lower fuel consumption and lower emissions of harmful gases. Also, many companies have adopted strategies for lowering emissions of harmful gases, maintenance costs and vehicle exploitation, including the use of software packages for operation management and maintenance of vehicle fleets. On the international market there are numerous of already made software packages for the operation management and maintenance of vehicle fleets. Some of the companies, having in mind the specificity of business or vehicle exploitation, have decided to develop their own software packages for operation management and maintenance of vehicle fleets. One of them is the company „SRBOLAB“ DOO. This paper analyzed the impact of the developed software package on the energy efficiency of the company's vehicle fleet. Firstly, it describes the structure of the developed software package, and after that, applied measures next to the software package, in order to improve energy efficiency and obtained results in the form of an analysis of the energy efficiency of the observed vehicle fleet before and after the implementation of software and measures. Analysis has shown that, regardless of the increased business, the total fuel consumption (l) and mileage (km) are higher after the implementation of software, as well as the energy efficiency of the observed vehicle fleet per CE groups which is reduced to specific fuel consumption (l/100km). Obtained results show that the differences in the specific fuel consumption (l/100km), before and after the implementation of software per CE groups, are in the range of 0,32 l/100km to 1,26 l/100km, in other words, fuel savings are from 4,1 % to 16,8%, if you look at this in percentages. Obtained results in comparison to the size, spent fuel (l), are showing savings in the range of 89 l to 342 l. Total fuel savings (l) for the observed vehicle fleet in the period of January to April 2023 is 626 l.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140247957","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}
Alfan Sarifudin, I. Yaningsih, Budi Kristiawan, Aditya Wibawa, Takahiko Miyazaki, K. Thu, A. Silitonga, Hwai Chyuan Ong
The development of cost-effective and environmentally friendly solar thermal technologies that deliver high performance poses several challenges, where the collector and absorber components play a pivotal role. This research addresses these issues by investigating enhanced temperature generation using a 30 cm × 30 cm Fresnel lens collector under solar illumination from a xenon lamp. Natural stone materials (andesite, coal, and pumice), characterized by granular structures with an average diameter of 1.68–2.00 mm, were selected because of their abundance and eco-friendliness. This research is focused on evaluating the effect of Fresnel lens on temperature generation performance. Two types of temperature generation tests were carried out: wet tests (where the natural stone materials were immersed in distilled water) and dry tests (where the natural stone materials were used in dry conditions). The morphologies of the natural stone materials were examined using an optical microscope and scanning electron microscope. Furthermore, the optical properties of the natural stone materials were analyzed using an ultraviolet–visible (UV–VIS) spectrophotometer. The findings revealed that there were significant improvements in the photothermal absorber performance with the use of a Fresnel lens in dry tests, where the highest temperature was achieved for coal (103.25 °C), followed by andesite (89.00 °C) and pumice (73.00 °C). The impurities varied between the materials, where the impurities were most dominant for pumice while coal was more uniform. Further examination using scanning electron microscope showed that all materials had light-trapping structures in the form of rough surfaces, pores, and crack gaps. Andesite was dominated by rough surfaces, while coal and pumice were dominated by crack gaps and pores, respectively. However, based on the UV–VIS spectrophotometric results, there were no correlations between the optical properties (absorbance, reflectance, and transmittance) and temperature achieved by the photothermal absorber materials. This research demonstrates the potential of using natural stone materials as photothermal absorbers in combination with a Fresnel lens collector for low-to-medium temperature solar thermal applications.
{"title":"INVESTIGATION OF GRANULAR NATURAL STONE MATERIALS AS PHOTOTHERMAL ABSORBERS FOR SUSTAINABLE AND ENVIRONMENTALLY FRIENDLY ENERGY HARVESTING","authors":"Alfan Sarifudin, I. Yaningsih, Budi Kristiawan, Aditya Wibawa, Takahiko Miyazaki, K. Thu, A. Silitonga, Hwai Chyuan Ong","doi":"10.5937/jaes0-47834","DOIUrl":"https://doi.org/10.5937/jaes0-47834","url":null,"abstract":"The development of cost-effective and environmentally friendly solar thermal technologies that deliver high performance poses several challenges, where the collector and absorber components play a pivotal role. This research addresses these issues by investigating enhanced temperature generation using a 30 cm × 30 cm Fresnel lens collector under solar illumination from a xenon lamp. Natural stone materials (andesite, coal, and pumice), characterized by granular structures with an average diameter of 1.68–2.00 mm, were selected because of their abundance and eco-friendliness. This research is focused on evaluating the effect of Fresnel lens on temperature generation performance. Two types of temperature generation tests were carried out: wet tests (where the natural stone materials were immersed in distilled water) and dry tests (where the natural stone materials were used in dry conditions). The morphologies of the natural stone materials were examined using an optical microscope and scanning electron microscope. Furthermore, the optical properties of the natural stone materials were analyzed using an ultraviolet–visible (UV–VIS) spectrophotometer. The findings revealed that there were significant improvements in the photothermal absorber performance with the use of a Fresnel lens in dry tests, where the highest temperature was achieved for coal (103.25 °C), followed by andesite (89.00 °C) and pumice (73.00 °C). The impurities varied between the materials, where the impurities were most dominant for pumice while coal was more uniform. Further examination using scanning electron microscope showed that all materials had light-trapping structures in the form of rough surfaces, pores, and crack gaps. Andesite was dominated by rough surfaces, while coal and pumice were dominated by crack gaps and pores, respectively. However, based on the UV–VIS spectrophotometric results, there were no correlations between the optical properties (absorbance, reflectance, and transmittance) and temperature achieved by the photothermal absorber materials. This research demonstrates the potential of using natural stone materials as photothermal absorbers in combination with a Fresnel lens collector for low-to-medium temperature solar thermal applications.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140254734","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}
Georgy Guryanov, M. Doudkin, Alina Kim, A. Vavilov, Yelibek Asangaliev, Vladimir Yakovlev, O.Ya. Vasilyeva, Oleg Vavilov
The article addresses the interaction of disc vibration working elements of a seed drill with soil to reduce traction resistance and energy consumption in soil processing. Regularities characterizing the impact of vibrations on the soil are identified, and a mechanical-mathematical model of soil cutting by the vibrational disc-working element of a seed drill is developed. Mathematical dependencies for determining the parameters of vibro-impact interaction of the cutting edge of the disc-working element with the soil are obtained. The efficiency conditions of the vibro-cutting process, in terms of reducing traction resistance and energy consumption, are established. A methodology for selecting rational parameters for vibro-cutting soil in the design and operation of the disc-working element of seeding equipment is developed. Experimental results of a prototype vibrational working equipment are presented, confirming theoretical findings and demonstrating the effectiveness and feasibility of vibrational soil cutting by the disc-working element for reducing traction resistance and energy costs. The research, the results of which are presented in this article, is funded by the Committee on Science of the Ministry of Science and Higher Education of the Republic of Kazakhstan (grant AP14869252 "Development of the universal sowing complex with increased productivity for the agro-industrial production of the Republic of Kazakhstan").
{"title":"JUSTIFICATION OF RATIONAL OPERATING PARAMETERS OF VIBRATION DISC-WORKING ENGINES OF SEEDING UNITS TO IMPROVE ENERGY-TECHNOLOGICAL INDICATORS","authors":"Georgy Guryanov, M. Doudkin, Alina Kim, A. Vavilov, Yelibek Asangaliev, Vladimir Yakovlev, O.Ya. Vasilyeva, Oleg Vavilov","doi":"10.5937/jaes0-48227","DOIUrl":"https://doi.org/10.5937/jaes0-48227","url":null,"abstract":"The article addresses the interaction of disc vibration working elements of a seed drill with soil to reduce traction resistance and energy consumption in soil processing. Regularities characterizing the impact of vibrations on the soil are identified, and a mechanical-mathematical model of soil cutting by the vibrational disc-working element of a seed drill is developed. Mathematical dependencies for determining the parameters of vibro-impact interaction of the cutting edge of the disc-working element with the soil are obtained. The efficiency conditions of the vibro-cutting process, in terms of reducing traction resistance and energy consumption, are established. A methodology for selecting rational parameters for vibro-cutting soil in the design and operation of the disc-working element of seeding equipment is developed. Experimental results of a prototype vibrational working equipment are presented, confirming theoretical findings and demonstrating the effectiveness and feasibility of vibrational soil cutting by the disc-working element for reducing traction resistance and energy costs. The research, the results of which are presented in this article, is funded by the Committee on Science of the Ministry of Science and Higher Education of the Republic of Kazakhstan (grant AP14869252 \"Development of the universal sowing complex with increased productivity for the agro-industrial production of the Republic of Kazakhstan\").","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140257259","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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