Pub Date : 2023-08-01DOI: 10.26855/jepes.2023.06.005
Gebeyaw Nibretie Checklie, Tassew Tadiowose, N. Ejigu
{"title":"Design and Modeling of Hybrid Solar PV/Mini Hydro Micro-grid Systems for Rural Electrification: A Case of Gilgel Abay River, Ethiopia","authors":"Gebeyaw Nibretie Checklie, Tassew Tadiowose, N. Ejigu","doi":"10.26855/jepes.2023.06.005","DOIUrl":"https://doi.org/10.26855/jepes.2023.06.005","url":null,"abstract":"","PeriodicalId":375554,"journal":{"name":"Journal of Electrical Power & Energy Systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129026402","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 : 2023-07-31DOI: 10.26855/jepes.2023.06.004
Zhe Hou, Zhiwei Dai, Jie Zhou
{"title":"Application of Acoustic Sensor in Partial Discharge of Transformer","authors":"Zhe Hou, Zhiwei Dai, Jie Zhou","doi":"10.26855/jepes.2023.06.004","DOIUrl":"https://doi.org/10.26855/jepes.2023.06.004","url":null,"abstract":"","PeriodicalId":375554,"journal":{"name":"Journal of Electrical Power & Energy Systems","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115203545","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 : 2023-05-12DOI: 10.26855/jepes.2023.06.003
Y. Sarikaya, B. Ibrahimoglu, M. Onal, B. Ibrahimoglu
{"title":"Liquid-solid Equilibrium Position and Critical Point for Benzene","authors":"Y. Sarikaya, B. Ibrahimoglu, M. Onal, B. Ibrahimoglu","doi":"10.26855/jepes.2023.06.003","DOIUrl":"https://doi.org/10.26855/jepes.2023.06.003","url":null,"abstract":"","PeriodicalId":375554,"journal":{"name":"Journal of Electrical Power & Energy Systems","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122253313","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 : 2023-05-10DOI: 10.26855/jepes.2023.06.002
Zhuguo Li
{"title":"Characteristics and Sensitivity of Tight Sandstone Reservoir in Q Area of the Southeast Edge of Ordos Basin","authors":"Zhuguo Li","doi":"10.26855/jepes.2023.06.002","DOIUrl":"https://doi.org/10.26855/jepes.2023.06.002","url":null,"abstract":"","PeriodicalId":375554,"journal":{"name":"Journal of Electrical Power & Energy Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130585349","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 : 2023-05-10DOI: 10.26855/jepes.2023.06.001
Jiacheng Dang, Xing-cai Liu
{"title":"Reservoir Characteristics of Chang 7 Member of X Oilfield, Ordos Basin","authors":"Jiacheng Dang, Xing-cai Liu","doi":"10.26855/jepes.2023.06.001","DOIUrl":"https://doi.org/10.26855/jepes.2023.06.001","url":null,"abstract":"","PeriodicalId":375554,"journal":{"name":"Journal of Electrical Power & Energy Systems","volume":"401 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129210678","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 : 2023-01-14DOI: 10.26855/jepes.2022.12.002
Y. Feng
{"title":"Broken Insulation Repair Based on Two-component Sub-polymer Resin Technology","authors":"Y. Feng","doi":"10.26855/jepes.2022.12.002","DOIUrl":"https://doi.org/10.26855/jepes.2022.12.002","url":null,"abstract":"","PeriodicalId":375554,"journal":{"name":"Journal of Electrical Power & Energy Systems","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130027492","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 : 2023-01-14DOI: 10.26855/jepes.2022.12.003
Runqi Wang
{"title":"Optimization Strategy of Multi-agent Integrated Energy System in Campus Considering Thermal and Electrical Demand Response","authors":"Runqi Wang","doi":"10.26855/jepes.2022.12.003","DOIUrl":"https://doi.org/10.26855/jepes.2022.12.003","url":null,"abstract":"","PeriodicalId":375554,"journal":{"name":"Journal of Electrical Power & Energy Systems","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133390746","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 : 2022-11-08DOI: 10.26855/jepes.2022.11.001
A. Rastogi
Polymer dispersed liquid crystals (PDLCs) have piqued the interest of researchers due to their exceptional property of electronically controlled switching mechanism. PDLC devices are sort of smart glazing/film that responds to electrical stimulus by changing its transparency. When liquid crystals are inactive, they are randomly organized, scattering light as it passes through the screen, giving the assembly its transparent, milky look. When a voltage is added, an electrical field forms between the two electrodes, causing the liquid crystals to align and enable light to flow through, thereby rendering the screen transparent. However, difficulties like as low contrast ratio, high operating voltage, and poor mechanical characteristics limit their practical uses. To address these issues, several procedures were implemented, including optimization of molecular structure of monomers and liquid crystals, addition of nanoparticles, and PDLC modification. This mini review will go through the current advancements in the method, preparations, and applications
{"title":"Polymer Dispersed Liquid Crystals (PDLCs): A Mini Review","authors":"A. Rastogi","doi":"10.26855/jepes.2022.11.001","DOIUrl":"https://doi.org/10.26855/jepes.2022.11.001","url":null,"abstract":"Polymer dispersed liquid crystals (PDLCs) have piqued the interest of researchers due to their exceptional property of electronically controlled switching mechanism. PDLC devices are sort of smart glazing/film that responds to electrical stimulus by changing its transparency. When liquid crystals are inactive, they are randomly organized, scattering light as it passes through the screen, giving the assembly its transparent, milky look. When a voltage is added, an electrical field forms between the two electrodes, causing the liquid crystals to align and enable light to flow through, thereby rendering the screen transparent. However, difficulties like as low contrast ratio, high operating voltage, and poor mechanical characteristics limit their practical uses. To address these issues, several procedures were implemented, including optimization of molecular structure of monomers and liquid crystals, addition of nanoparticles, and PDLC modification. This mini review will go through the current advancements in the method, preparations, and applications","PeriodicalId":375554,"journal":{"name":"Journal of Electrical Power & Energy Systems","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131512099","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 : 2022-03-28DOI: 10.26855/jepes.2022.03.001
F. Babalola, Taofeek M. Adelaja
A comparative thermodynamic analysis of the Organic Rankine Cycle (ORC) using various working fluids was done using models developed in this work with the ASPEN Plus software to determine the thermal and exergy efficiencies of the ORC when running on six selected promising working fluids. The process was designed for power generation using a low heat source of about 40 o C. Two layouts were considered; one was a typical ORC while the other was an ORC with a recuperator for heat energy savings. The process was run with two temperature conditions of 30 degrees superheat and 30 o C at the turbine inlet. Six working fluids; three wet (R-152a, R-134a, and R-32)) and three dry (R-600, R-600a and R-245fa) were selected based on their physical, chemical, environmental and economic criteria. The results showed that no single fluid perfectly met all requirements but in a trade-off, their overall performances at the turbine inlet temperature of 30 o C were preferred and R-32 emerged as the best ranked followed by R-600a and then R-134a; next was R-152a then R-600 and lastly R-245fa. for Layout-2 making a total of twenty-four simulations
{"title":"A Comparative Thermodynamic Analysis of the Rankine Cycle Using Various Organic Working Fluids","authors":"F. Babalola, Taofeek M. Adelaja","doi":"10.26855/jepes.2022.03.001","DOIUrl":"https://doi.org/10.26855/jepes.2022.03.001","url":null,"abstract":"A comparative thermodynamic analysis of the Organic Rankine Cycle (ORC) using various working fluids was done using models developed in this work with the ASPEN Plus software to determine the thermal and exergy efficiencies of the ORC when running on six selected promising working fluids. The process was designed for power generation using a low heat source of about 40 o C. Two layouts were considered; one was a typical ORC while the other was an ORC with a recuperator for heat energy savings. The process was run with two temperature conditions of 30 degrees superheat and 30 o C at the turbine inlet. Six working fluids; three wet (R-152a, R-134a, and R-32)) and three dry (R-600, R-600a and R-245fa) were selected based on their physical, chemical, environmental and economic criteria. The results showed that no single fluid perfectly met all requirements but in a trade-off, their overall performances at the turbine inlet temperature of 30 o C were preferred and R-32 emerged as the best ranked followed by R-600a and then R-134a; next was R-152a then R-600 and lastly R-245fa. for Layout-2 making a total of twenty-four simulations","PeriodicalId":375554,"journal":{"name":"Journal of Electrical Power & Energy Systems","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123399584","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 : 2022-02-25DOI: 10.26855/jepes.2022.02.001
Deniz Sarper Semerci̇
As importance of renewable energy sources increase with respect to energy demands, turbine efficiencies become more important. Francis turbines are one of the most common turbine types in use at hydroelectric power plants. In some cases such as load rejection and high load operations, pressure fluctuations and vortex formation cause Francis turbine efficiency and endurance to decrease. To prevent these effects, a new component named Vortex Preventing Element (VPE) is designed. The main idea of this new design is damping the swirling slow with Vortex Preventing Element and improving the performance of suction side of runner blades. This new element is mounted between turbine runner and draft tube. CFD analyses are carried out with and without VPE. Preliminary results show that VPE with having only one spiral element provides more uniform flow through the draft tube. According to the preliminary results, the new design also provides an efficiency increment about 4%.
{"title":"Controlling Flow in Draft Tube of Francis Turbine by Vortex Preventing Element","authors":"Deniz Sarper Semerci̇","doi":"10.26855/jepes.2022.02.001","DOIUrl":"https://doi.org/10.26855/jepes.2022.02.001","url":null,"abstract":"As importance of renewable energy sources increase with respect to energy demands, turbine efficiencies become more important. Francis turbines are one of the most common turbine types in use at hydroelectric power plants. In some cases such as load rejection and high load operations, pressure fluctuations and vortex formation cause Francis turbine efficiency and endurance to decrease. To prevent these effects, a new component named Vortex Preventing Element (VPE) is designed. The main idea of this new design is damping the swirling slow with Vortex Preventing Element and improving the performance of suction side of runner blades. This new element is mounted between turbine runner and draft tube. CFD analyses are carried out with and without VPE. Preliminary results show that VPE with having only one spiral element provides more uniform flow through the draft tube. According to the preliminary results, the new design also provides an efficiency increment about 4%.","PeriodicalId":375554,"journal":{"name":"Journal of Electrical Power & Energy Systems","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128312132","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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