Pub Date : 2023-12-21DOI: 10.1080/23311916.2023.2283320
L. Shbeeb
{"title":"Evaluating road work site safety management: A case study of the Amman bus rapid transit project construction","authors":"L. Shbeeb","doi":"10.1080/23311916.2023.2283320","DOIUrl":"https://doi.org/10.1080/23311916.2023.2283320","url":null,"abstract":"","PeriodicalId":10464,"journal":{"name":"Cogent Engineering","volume":"50 3","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138949613","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}
Pub Date : 2023-12-19DOI: 10.1080/23311916.2023.2287303
Shabina Ghafir, M. A. Alam, Farheen Siddiqui, Sameena Naaz, S. S. Sohail, D. Madsen
{"title":"Toward optimizing scientific workflow using multi-objective optimization in a cloud environment","authors":"Shabina Ghafir, M. A. Alam, Farheen Siddiqui, Sameena Naaz, S. S. Sohail, D. Madsen","doi":"10.1080/23311916.2023.2287303","DOIUrl":"https://doi.org/10.1080/23311916.2023.2287303","url":null,"abstract":"","PeriodicalId":10464,"journal":{"name":"Cogent Engineering","volume":" 653","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138960368","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}
Pub Date : 2023-12-18DOI: 10.1080/23311916.2023.2284534
Buana Ma’ruf, M. I. Mustajib, A. Bisri, Suwahyu Suwahyu, E. Suwarni, N. Nurcholis, Rina Rina, Syaiful Bahri, Moh. Muria Armansyah Sugiarto, Bagus Fadhilah Nur Imani, Shinta Jihar Akif Rahadi
{"title":"Technology capability of Indonesian medium-sized shipyards for ship production using Product-oriented Work Breakdown Structure method (case study on shipbuilding of Mini LNG vessel)","authors":"Buana Ma’ruf, M. I. Mustajib, A. Bisri, Suwahyu Suwahyu, E. Suwarni, N. Nurcholis, Rina Rina, Syaiful Bahri, Moh. Muria Armansyah Sugiarto, Bagus Fadhilah Nur Imani, Shinta Jihar Akif Rahadi","doi":"10.1080/23311916.2023.2284534","DOIUrl":"https://doi.org/10.1080/23311916.2023.2284534","url":null,"abstract":"","PeriodicalId":10464,"journal":{"name":"Cogent Engineering","volume":"130 ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139174870","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}
Pub Date : 2023-12-18DOI: 10.1080/23311916.2023.2293562
Girma Dejene, V. Ancha, A. Bekele
{"title":"NREL Phase VI wind turbine blade tip with S809 airfoil profile winglet design and performance analysis using computational fluid dynamics","authors":"Girma Dejene, V. Ancha, A. Bekele","doi":"10.1080/23311916.2023.2293562","DOIUrl":"https://doi.org/10.1080/23311916.2023.2293562","url":null,"abstract":"","PeriodicalId":10464,"journal":{"name":"Cogent Engineering","volume":"125 ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139175808","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}
Pub Date : 2023-12-12DOI: 10.1080/23311916.2023.2292325
Farhad Zishan, Ehsan Akbari, O. Montoya
{"title":"Analysis of probabilistic optimal power flow in the power system with the presence of microgrid correlation coefficients","authors":"Farhad Zishan, Ehsan Akbari, O. Montoya","doi":"10.1080/23311916.2023.2292325","DOIUrl":"https://doi.org/10.1080/23311916.2023.2292325","url":null,"abstract":"","PeriodicalId":10464,"journal":{"name":"Cogent Engineering","volume":"17 5","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139009509","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}
Pub Date : 2023-12-08DOI: 10.1080/23311916.2023.2288411
Kalyani Makarand Kurundkar, G. Vaidya
Abstract The rising use of electric mobility has weakened the relationship between wholesale energy prices and price-responsive demand such as charging Electric vehicles (EV). This adversely affects network flows. The situation can further worsen, causing congestion in the distribution network and a rise in energy prices. In this paper, an attempt is made to resolve this issue through Distributed generators (DGs) placed in a grid-connected microgrid. The authors propose a methodology based on “Distribution Locational Marginal pricing (DLMP)” and the use of “Hybrid optimal Firefly Particle Swarm Optimization” with “TOPSIS” (HFPSO-TOPSIS) approach for optimal DG sizing in this methodology. The methodology consists of two stages. The first stage is locating DGs on the bus, and the second stage is sizing DGs and their participation in providing ancillary service of congestion management through a grid-connected microgrid. The method is tested on a “modified IEEE 33 bus radial active distribution system”. Two different system conditions in which congestion can occur are analyzed and congestion is successfully removed by this proposed method. Power Loss reduction of more than 75% is achieved in each case after the implementation of the proposed methodology. Minimization of voltage deviation and maximization of voltage stability is achieved. The generation cost is minimized by almost 70%. The results obtained show better performance of HFPSO-TOPSIS as compared with other existing techniques. The results obtained exhibit that the methodology is generic and can be implemented for any congestion condition and can successfully remove congestion with improvement in system performance bringing social welfare.
{"title":"Congestion management ancillary service at the distribution level through grid-connected microgrid based on DLMP and HFPSO-TOPSIS approach","authors":"Kalyani Makarand Kurundkar, G. Vaidya","doi":"10.1080/23311916.2023.2288411","DOIUrl":"https://doi.org/10.1080/23311916.2023.2288411","url":null,"abstract":"Abstract The rising use of electric mobility has weakened the relationship between wholesale energy prices and price-responsive demand such as charging Electric vehicles (EV). This adversely affects network flows. The situation can further worsen, causing congestion in the distribution network and a rise in energy prices. In this paper, an attempt is made to resolve this issue through Distributed generators (DGs) placed in a grid-connected microgrid. The authors propose a methodology based on “Distribution Locational Marginal pricing (DLMP)” and the use of “Hybrid optimal Firefly Particle Swarm Optimization” with “TOPSIS” (HFPSO-TOPSIS) approach for optimal DG sizing in this methodology. The methodology consists of two stages. The first stage is locating DGs on the bus, and the second stage is sizing DGs and their participation in providing ancillary service of congestion management through a grid-connected microgrid. The method is tested on a “modified IEEE 33 bus radial active distribution system”. Two different system conditions in which congestion can occur are analyzed and congestion is successfully removed by this proposed method. Power Loss reduction of more than 75% is achieved in each case after the implementation of the proposed methodology. Minimization of voltage deviation and maximization of voltage stability is achieved. The generation cost is minimized by almost 70%. The results obtained show better performance of HFPSO-TOPSIS as compared with other existing techniques. The results obtained exhibit that the methodology is generic and can be implemented for any congestion condition and can successfully remove congestion with improvement in system performance bringing social welfare.","PeriodicalId":10464,"journal":{"name":"Cogent Engineering","volume":"10 19","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138589869","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}
Pub Date : 2023-12-08DOI: 10.1080/23311916.2023.2288436
G. Chalageri, S. Bekinal, M. Doddamani
Abstract The present work focuses on the rotor dynamic properties of a 650 W roof-top horizontal axis windturbine (HAWT) rotor supported by radial permanent magnet bearings (PMBs). Radial PMBs were designed and optimized concerning the rotor of a wind turbine for maximum stiffness. Initially, a generalized design and optimization process for multi-ring radial PMBs (MrRPMBs) with a radial air gap is presented to get the maximized force and stiffness per magnet volume. The proposed mathematical model is validated using the Finite Element (FE) analysis tool Ansys for chosen rotor dimensions. Then, the same optimization technique was extended for HAWT rotor bearings to extract the optimized multi-ring radial bearing parameters. The dynamic investigation is performed to study the effect of bearing parameters on the rotor-bearing modal frequency and dynamic amplitude of a rotor. Firstly, the dynamic investigation was performed for the conventional deep groove ball bearings (DGBs) supported rotor, considering the effect of bearing span length. Secondly, the dynamic response was analyzed for the rotor system through a hybrid bearing set (HBS) by replacing DGB with PMB. Finally, DGBs are completely replaced by radial PMBs. FEanalysis was performed using the Ansys workbench rotor dynamic tool for all the bearing combinations.
{"title":"Dynamic investigation of 650 W roof-top horizontal wind turbine rotor system supported by radial permanent magnet bearings","authors":"G. Chalageri, S. Bekinal, M. Doddamani","doi":"10.1080/23311916.2023.2288436","DOIUrl":"https://doi.org/10.1080/23311916.2023.2288436","url":null,"abstract":"Abstract The present work focuses on the rotor dynamic properties of a 650 W roof-top horizontal axis windturbine (HAWT) rotor supported by radial permanent magnet bearings (PMBs). Radial PMBs were designed and optimized concerning the rotor of a wind turbine for maximum stiffness. Initially, a generalized design and optimization process for multi-ring radial PMBs (MrRPMBs) with a radial air gap is presented to get the maximized force and stiffness per magnet volume. The proposed mathematical model is validated using the Finite Element (FE) analysis tool Ansys for chosen rotor dimensions. Then, the same optimization technique was extended for HAWT rotor bearings to extract the optimized multi-ring radial bearing parameters. The dynamic investigation is performed to study the effect of bearing parameters on the rotor-bearing modal frequency and dynamic amplitude of a rotor. Firstly, the dynamic investigation was performed for the conventional deep groove ball bearings (DGBs) supported rotor, considering the effect of bearing span length. Secondly, the dynamic response was analyzed for the rotor system through a hybrid bearing set (HBS) by replacing DGB with PMB. Finally, DGBs are completely replaced by radial PMBs. FEanalysis was performed using the Ansys workbench rotor dynamic tool for all the bearing combinations.","PeriodicalId":10464,"journal":{"name":"Cogent Engineering","volume":"46 34","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138588343","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}
Pub Date : 2023-12-07DOI: 10.1080/23311916.2023.2283334
Abla Marie-Josée Nadège Kougnigan, John Mwero, Raphael Mutuku
Abstract This research aims to examine the mechanical characteristics and thermal performance of concrete masonry blocks made from clay waste bricks that have been crushed, used as coarse aggregates, and incorporated plastic bottles. A simulation of the heat transfer of blocks was also made using Finite Element Method. The study uses plastic bottles of 350 ml of volume and clay brick waste as a complete replacement for traditional aggregates to produce lightweight concrete. The blocks utilized in the study were 150 mm × 200 mm×400 mm in size. The blocks underwent testing for various properties such as water absorption, ultrasonic pulse velocity, density, compressive strength, and thermal conductivity to ASTM C140 standards. The incorporation of plastic bottles created 23% voids in the blocks for the density test, and the results revealed that the block’s performance met the ASTM C129 standards for load-supporting blocks with regard to its capacity to absorb water (134.9 kg/m3), lightness, and strength (12MPa). Additionally, the study revealed a decrease in thermal conductivity by more than 50% compared to conventional concrete blocks without bottles; a result which was confirmed by the blocks’ heat transfer simulation. In conclusion, based on the fact that the blocks studied met the mechanical standards for load-bearing masonry units, it is proposed that the construction sector consider incorporating these types of blocks in areas where heat insulation is necessary to reduce building energy consumption related to cooling.
{"title":"Modeling of Thermal Performance and Mechanical Properties of Concrete Blocks Incorporating Plastic Bottle Waste with Crushed Clay Bricks as Coarse Aggregates","authors":"Abla Marie-Josée Nadège Kougnigan, John Mwero, Raphael Mutuku","doi":"10.1080/23311916.2023.2283334","DOIUrl":"https://doi.org/10.1080/23311916.2023.2283334","url":null,"abstract":"Abstract This research aims to examine the mechanical characteristics and thermal performance of concrete masonry blocks made from clay waste bricks that have been crushed, used as coarse aggregates, and incorporated plastic bottles. A simulation of the heat transfer of blocks was also made using Finite Element Method. The study uses plastic bottles of 350 ml of volume and clay brick waste as a complete replacement for traditional aggregates to produce lightweight concrete. The blocks utilized in the study were 150 mm × 200 mm×400 mm in size. The blocks underwent testing for various properties such as water absorption, ultrasonic pulse velocity, density, compressive strength, and thermal conductivity to ASTM C140 standards. The incorporation of plastic bottles created 23% voids in the blocks for the density test, and the results revealed that the block’s performance met the ASTM C129 standards for load-supporting blocks with regard to its capacity to absorb water (134.9 kg/m3), lightness, and strength (12MPa). Additionally, the study revealed a decrease in thermal conductivity by more than 50% compared to conventional concrete blocks without bottles; a result which was confirmed by the blocks’ heat transfer simulation. In conclusion, based on the fact that the blocks studied met the mechanical standards for load-bearing masonry units, it is proposed that the construction sector consider incorporating these types of blocks in areas where heat insulation is necessary to reduce building energy consumption related to cooling.","PeriodicalId":10464,"journal":{"name":"Cogent Engineering","volume":"41 2","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138593618","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}
Pub Date : 2023-12-07DOI: 10.1080/23311916.2023.2289261
Brahim Menacer, Sunny Narayan, Faisal O. Mahroogi
Abstract The main goal of the contemporary automotive industry is to improve efficiency and reduce harmful emissions of internal combustion engines. Approximately 25% of the total mechanical losses in engines are attributed to friction in the piston rings.Therefore, in all modern engines, a twin land oil control ring (TLOCR) is used due to its affordable cost and satisfactory performance in oil regulation under low workload conditions. In this work, a model for the oil control ring (TLOCR) was proposed, which takes into account ring elastic deformation. The TLOCR model was used to evaluate friction produced in piston ring assembly and the results were compared to the experiment data obtained from a single cylinder diesel engine. The model was based on correlation between the lubricating oil pressure and oil film thickness developed. The behavior of lubricant oil was investigated for different engine operational conditions and different tensions in the rings. Both experimental and numerical modeling data showed a good match, thereby validating the proposed model
{"title":"Studying hydrodynamic friction in the oil ring/cylinder liner contact of an internal combustion engine","authors":"Brahim Menacer, Sunny Narayan, Faisal O. Mahroogi","doi":"10.1080/23311916.2023.2289261","DOIUrl":"https://doi.org/10.1080/23311916.2023.2289261","url":null,"abstract":"Abstract The main goal of the contemporary automotive industry is to improve efficiency and reduce harmful emissions of internal combustion engines. Approximately 25% of the total mechanical losses in engines are attributed to friction in the piston rings.Therefore, in all modern engines, a twin land oil control ring (TLOCR) is used due to its affordable cost and satisfactory performance in oil regulation under low workload conditions. In this work, a model for the oil control ring (TLOCR) was proposed, which takes into account ring elastic deformation. The TLOCR model was used to evaluate friction produced in piston ring assembly and the results were compared to the experiment data obtained from a single cylinder diesel engine. The model was based on correlation between the lubricating oil pressure and oil film thickness developed. The behavior of lubricant oil was investigated for different engine operational conditions and different tensions in the rings. Both experimental and numerical modeling data showed a good match, thereby validating the proposed model","PeriodicalId":10464,"journal":{"name":"Cogent Engineering","volume":"17 21","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138591345","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}