Pub Date : 2023-10-02DOI: 10.1080/15567036.2023.2273409
Yashwant Singh Bisht, S D Pandey, Sunil Chamoli
ABSTRACTHeating and cooling systems benefit from jet impingement as it increases efficiency while reducing operating costs. The combined methodology, integrating jet impingement and passive heat transfer through the use of roughened surfaces, offers significant potential for improving heat transfer. This research presents the results of an experimental study on a channel flow commonly used for air heating, known as a solar air heater (SAH), with impinging air on the heated surface. The surface is embedded with V-shaped ribs as turbulence promoters, and it receives a continuous heat flow of 1,000 W/m2. Various design combinations were tested experimentally, including streamwise pitch ratio X/Dh = 0.866, spanwise pitch ratio Y/Dh = 0.866, jet diameter to hydraulic diameter ratio Dj/Dh = 0.065, and an angle of attack (α) ranging from 45° to 90°. During these experiments, the Re varied from 3,500 to 18,000. The optimal improvement was observed at values of X/Dh = Y/Dh = 0.866, Dj/Dh = 0.065, and α = 60°. This paper presents novel findings demonstrating that incorporating V-shaped rib patterns in SAHs can yield Nusselt numbers up to 5.2 times higher than those in smooth duct SAHs, offering substantial potential for enhanced energy efficiency. When the entering jet impacts and flows along the ribs of the absorber, the findings suggest that the V-shaped ribs accelerate the flow, resulting in enhanced heat transfer. All datasets were also analyzed for their thermo-hydraulic performance, with the maximum value recorded as 3.301 within the constraint range used in this analysis.KEYWORDS: Jet impingementheat transfercoupled techniqueV-shaped ribsjet diameter Nomenclature STC=Solar thermal collectorSAH=Solar air heaterCp=Specific heat in J/(kg K)Dj=Diameter of the jet in mmΔPd=Pressure drop across the duct in Pascal (Pa)Dh=Hydraulic diameter in mmK=Conductivity of air in W/(m·K)To=Outlet temperature in °CRe=Reynolds numberNu=Nusselt numberNus=Nusselt number for smoothf=Friction factorfs=Friction factor for smoothTi=Inlet temperature in °CTEF=Thermohydraulic performanceV=Velocity of air in m/sX/Dh=Streamwise pitch ratioY/Dh=Spanwise pitch ratioDj/Dh=Jet diameter to hydraulic diameter ratiom˙a=Mass flow rate of air in (kg/s)Greek letters=ρa=Density of airυa=Kinematic viscosity of airDisclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsYashwant Singh BishtYaswant Singh Bisht is working as an Assistant Professor in the Department of Mechanical Engineering, Uttaranchal Institute of Technology, Uttaranchal University Dehradun, India. He is doing research in the area thermal engineering, CFD.S D PandeyDr. S D Pandey working as a Professor and Dean in Uttaranchal Institute of Technology, Uttaranchal University Dehradun, India. He has more than 15 years of research and teaching experience. He has guided many students and published many research articles in top-notch journals and conferences.Sun
{"title":"Experimental investigation on jet impingement heat transfer analysis in a channel flow embedded with V-shaped patterned surface","authors":"Yashwant Singh Bisht, S D Pandey, Sunil Chamoli","doi":"10.1080/15567036.2023.2273409","DOIUrl":"https://doi.org/10.1080/15567036.2023.2273409","url":null,"abstract":"ABSTRACTHeating and cooling systems benefit from jet impingement as it increases efficiency while reducing operating costs. The combined methodology, integrating jet impingement and passive heat transfer through the use of roughened surfaces, offers significant potential for improving heat transfer. This research presents the results of an experimental study on a channel flow commonly used for air heating, known as a solar air heater (SAH), with impinging air on the heated surface. The surface is embedded with V-shaped ribs as turbulence promoters, and it receives a continuous heat flow of 1,000 W/m2. Various design combinations were tested experimentally, including streamwise pitch ratio X/Dh = 0.866, spanwise pitch ratio Y/Dh = 0.866, jet diameter to hydraulic diameter ratio Dj/Dh = 0.065, and an angle of attack (α) ranging from 45° to 90°. During these experiments, the Re varied from 3,500 to 18,000. The optimal improvement was observed at values of X/Dh = Y/Dh = 0.866, Dj/Dh = 0.065, and α = 60°. This paper presents novel findings demonstrating that incorporating V-shaped rib patterns in SAHs can yield Nusselt numbers up to 5.2 times higher than those in smooth duct SAHs, offering substantial potential for enhanced energy efficiency. When the entering jet impacts and flows along the ribs of the absorber, the findings suggest that the V-shaped ribs accelerate the flow, resulting in enhanced heat transfer. All datasets were also analyzed for their thermo-hydraulic performance, with the maximum value recorded as 3.301 within the constraint range used in this analysis.KEYWORDS: Jet impingementheat transfercoupled techniqueV-shaped ribsjet diameter Nomenclature STC=Solar thermal collectorSAH=Solar air heaterCp=Specific heat in J/(kg K)Dj=Diameter of the jet in mmΔPd=Pressure drop across the duct in Pascal (Pa)Dh=Hydraulic diameter in mmK=Conductivity of air in W/(m·K)To=Outlet temperature in °CRe=Reynolds numberNu=Nusselt numberNus=Nusselt number for smoothf=Friction factorfs=Friction factor for smoothTi=Inlet temperature in °CTEF=Thermohydraulic performanceV=Velocity of air in m/sX/Dh=Streamwise pitch ratioY/Dh=Spanwise pitch ratioDj/Dh=Jet diameter to hydraulic diameter ratiom˙a=Mass flow rate of air in (kg/s)Greek letters=ρa=Density of airυa=Kinematic viscosity of airDisclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsYashwant Singh BishtYaswant Singh Bisht is working as an Assistant Professor in the Department of Mechanical Engineering, Uttaranchal Institute of Technology, Uttaranchal University Dehradun, India. He is doing research in the area thermal engineering, CFD.S D PandeyDr. S D Pandey working as a Professor and Dean in Uttaranchal Institute of Technology, Uttaranchal University Dehradun, India. He has more than 15 years of research and teaching experience. He has guided many students and published many research articles in top-notch journals and conferences.Sun","PeriodicalId":11580,"journal":{"name":"Energy Sources, Part A: Recovery, Utilization, and Environmental Effects","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135947907","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}
ABSTRACTThe electric-hydraulic hybrid vehicle (EHHV) is an important research area of hybrid electric vehicles (HEV), which provides a competitive project compared to other hybrid technologies. This paper conducts comprehensive research on a master-slave electric-hydraulic hybrid vehicle (MSEHHV). After an integrated driving cycle, the battery state of charge (SOC) values for MSEHHV and electric vehicle (EV) are 44.65% and 38.27%. The economy of the MSEHHV is verified, which is obviously superior to the EV. To further explore the energy conservation potential of the MSEHHV, the research proposes a cooperative optimization method of powertrain parameters and control strategy. Specifically, the optimization objective is to improve SOC. The response surface method (RSM) fits the functional relation between design variables and optimization objective. An optimization model is constructed based on the response surface model. Ultimately, the particle swarm optimization (PSO) algorithm is used for the optimal solution to obtain the optimal parameter combination. To evaluate the adaptability of the method, the performance of three models in the actual driving cycle is compared. Simulation results suggest that the energy consumption of the optimized MSEHHV is 33.41% and 6.33% lower than that of EV and initial MSEHHV. The research provides a valuable reference for the optimal design of electric-hydraulic hybrid technology.KEYWORDS: hybrid electric vehicleelectric-hydraulicparameter optimizationpowertrain componentcontrol strategy Nomenclature EV=HPAHEV=Hybrid electric vehicleEHHV=Electric-hydraulic hybrid vehicleMSEHHV=Master-slave electric-hydraulic hybrid vehicleSOC=State of chargeRSM=Response surface methodPSO=Particle swarm optimization algorithmLHS=Latin hypercube samplingHD=Hydraulic drive modeED=Electric drive modeE-HD=Electric-hydraulic drive modeHRB=Hydraulic regenerative braking modeERB=Electric regenerative braking modeVCU=Vehicle control unitHPA=The high-pressure accumulatorLPA=The low-pressure accumulatorHP/M=Hydraulic pump/motoru=The velocity threshold10-15=Japanese 10-15 mode cycleHWFET=Highway fuel economy testUS06=The US06 supplemental federal test procedureSC03=The SC03 supplemental federal test procedureNEDC=New European driving cycleu1=The low-velocity thresholdu2=The high-velocity thresholdpL=The lowest working pressure of the LPApH=The highest working pressure of the HPAAcknowledgementsThe project is supported partly by the National Natural Science Foundation of China (No. 52075278), and the Municipal Livelihood Science and Technology Project of Qingdao (No. 19-6-1-92-nsh).Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis work was supported by the National Natural Science Foundation of China [52107220]; Municipal Livelihood Science and Technology Project of Qingdao [19-6-1-92-nsh].Notes on contributorsQingxiao JiaQingxiao Jia is a degree graduate student at the College
{"title":"Powertrain parameters and control strategy optimization of a novel master-slave electric-hydraulic hybrid vehicle","authors":"Qingxiao Jia, Caihong Zhang, Hongxin Zhang, Zhen Zhang, Hao Chen","doi":"10.1080/15567036.2023.2263397","DOIUrl":"https://doi.org/10.1080/15567036.2023.2263397","url":null,"abstract":"ABSTRACTThe electric-hydraulic hybrid vehicle (EHHV) is an important research area of hybrid electric vehicles (HEV), which provides a competitive project compared to other hybrid technologies. This paper conducts comprehensive research on a master-slave electric-hydraulic hybrid vehicle (MSEHHV). After an integrated driving cycle, the battery state of charge (SOC) values for MSEHHV and electric vehicle (EV) are 44.65% and 38.27%. The economy of the MSEHHV is verified, which is obviously superior to the EV. To further explore the energy conservation potential of the MSEHHV, the research proposes a cooperative optimization method of powertrain parameters and control strategy. Specifically, the optimization objective is to improve SOC. The response surface method (RSM) fits the functional relation between design variables and optimization objective. An optimization model is constructed based on the response surface model. Ultimately, the particle swarm optimization (PSO) algorithm is used for the optimal solution to obtain the optimal parameter combination. To evaluate the adaptability of the method, the performance of three models in the actual driving cycle is compared. Simulation results suggest that the energy consumption of the optimized MSEHHV is 33.41% and 6.33% lower than that of EV and initial MSEHHV. The research provides a valuable reference for the optimal design of electric-hydraulic hybrid technology.KEYWORDS: hybrid electric vehicleelectric-hydraulicparameter optimizationpowertrain componentcontrol strategy Nomenclature EV=HPAHEV=Hybrid electric vehicleEHHV=Electric-hydraulic hybrid vehicleMSEHHV=Master-slave electric-hydraulic hybrid vehicleSOC=State of chargeRSM=Response surface methodPSO=Particle swarm optimization algorithmLHS=Latin hypercube samplingHD=Hydraulic drive modeED=Electric drive modeE-HD=Electric-hydraulic drive modeHRB=Hydraulic regenerative braking modeERB=Electric regenerative braking modeVCU=Vehicle control unitHPA=The high-pressure accumulatorLPA=The low-pressure accumulatorHP/M=Hydraulic pump/motoru=The velocity threshold10-15=Japanese 10-15 mode cycleHWFET=Highway fuel economy testUS06=The US06 supplemental federal test procedureSC03=The SC03 supplemental federal test procedureNEDC=New European driving cycleu1=The low-velocity thresholdu2=The high-velocity thresholdpL=The lowest working pressure of the LPApH=The highest working pressure of the HPAAcknowledgementsThe project is supported partly by the National Natural Science Foundation of China (No. 52075278), and the Municipal Livelihood Science and Technology Project of Qingdao (No. 19-6-1-92-nsh).Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis work was supported by the National Natural Science Foundation of China [52107220]; Municipal Livelihood Science and Technology Project of Qingdao [19-6-1-92-nsh].Notes on contributorsQingxiao JiaQingxiao Jia is a degree graduate student at the College ","PeriodicalId":11580,"journal":{"name":"Energy Sources, Part A: Recovery, Utilization, and Environmental Effects","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135900946","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 : 2023-10-02DOI: 10.1080/15567036.2023.2271433
Shobhit Khanna, Rabindra Prasad, C.P. Jawahar, Zafar Said
ABSTRACTRecent advancements in energy conversion technologies have effectively addressed global challenges like fuel dependency, production costs, waste management, and pollution control. Utilizing natural waste to generate synthetic fuels represents a viable strategy for improved energy conservation, pollution mitigation, cost-effectiveness, sustainable production, and socio-economic development. Synthetic fuels are gaining global prominence as they reduce crude oil consumption, especially in the transportation and industrial sectors. This research meticulously reviews technologies available for synthesizing fuels from biological waste and enhancing feedstock quality. This study highlights the increasing adoption of algae as a feedstock for biofuel extraction via photobioreactors. Moreover, bioethanol and biobutanol can be derived from grasses through the lignocellulosic process. A pressing concern is the disposal of Municipal Solid Waste (MSW); however, biodiesel ester and biogas can be procured from MSW via transesterification and advanced gasification processes. While refined fuel production offers potential solutions to climate change and resource utilization challenges, specific issues persist. These include high production costs, significant power consumption, extended processing times, and inconsistent feedstock collection. Nonetheless, this study emphasizes the potential of advanced biofuel production from second-generation feedstocks. Such biofuels serve as promising carbon-based chemical sources for industrial and transportation applications, filling gaps left by conventional fuels.KEYWORDS: Synthetic fuelalcohol, Biodieselfeedstockmethanoltransesterification Nomenclature ASTM=American Society for Testing and MaterialsBTU=British Thermal UnitCaO=Calcium OxideCH4=MethaneCO2=Carbon DioxideCO=Carbon MonoxideCI=Compression IgnitionCNG=Compressed Natural GasDB=Diesel-Biodiesel blendFFA=Free Fatty AcidFT=Fischer-Tropsch fuelFAME=Fatty Acids and Methyl EstersH2=HydrogenH2O=WaterH2S=Hydrogen SulphideHCl=Hydrochloric acidH2SO4=Sulphuric AcidIC=Internal CombustionKOH=Potassium HydroxideLPG=Liquefied Petroleum GasMTBE=Methyl Tert-Butyl EtherNH3=AmmoniaNOx=Oxides of NitrogenNaOH=Sodium HydroxideNaOCH3=Sodium MethoxideOECD=Organization for Economic Cooperation and DevelopmentPAH=Polycyclic Aromatic HydrocarbonR&D=Research & DevelopmentDisclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsShobhit KhannaShobhit Khanna is working as a Senior Education Officer in defence, India and having 13 years of experience in designing and implementing effective training programs and curriculum for various academies that are not just academically rigorous but also attuned to the practical requirements of the real world. He has completed his Master’s degree in Thermal Engineering from IIT Madras. He is pursing Doctoral degree in the field of Mechanical Engineering from Amity University Madhya
{"title":"Review on second-generation synthetic fuel: feedstocks, potential production, deployable technologies, and challenges","authors":"Shobhit Khanna, Rabindra Prasad, C.P. Jawahar, Zafar Said","doi":"10.1080/15567036.2023.2271433","DOIUrl":"https://doi.org/10.1080/15567036.2023.2271433","url":null,"abstract":"ABSTRACTRecent advancements in energy conversion technologies have effectively addressed global challenges like fuel dependency, production costs, waste management, and pollution control. Utilizing natural waste to generate synthetic fuels represents a viable strategy for improved energy conservation, pollution mitigation, cost-effectiveness, sustainable production, and socio-economic development. Synthetic fuels are gaining global prominence as they reduce crude oil consumption, especially in the transportation and industrial sectors. This research meticulously reviews technologies available for synthesizing fuels from biological waste and enhancing feedstock quality. This study highlights the increasing adoption of algae as a feedstock for biofuel extraction via photobioreactors. Moreover, bioethanol and biobutanol can be derived from grasses through the lignocellulosic process. A pressing concern is the disposal of Municipal Solid Waste (MSW); however, biodiesel ester and biogas can be procured from MSW via transesterification and advanced gasification processes. While refined fuel production offers potential solutions to climate change and resource utilization challenges, specific issues persist. These include high production costs, significant power consumption, extended processing times, and inconsistent feedstock collection. Nonetheless, this study emphasizes the potential of advanced biofuel production from second-generation feedstocks. Such biofuels serve as promising carbon-based chemical sources for industrial and transportation applications, filling gaps left by conventional fuels.KEYWORDS: Synthetic fuelalcohol, Biodieselfeedstockmethanoltransesterification Nomenclature ASTM=American Society for Testing and MaterialsBTU=British Thermal UnitCaO=Calcium OxideCH4=MethaneCO2=Carbon DioxideCO=Carbon MonoxideCI=Compression IgnitionCNG=Compressed Natural GasDB=Diesel-Biodiesel blendFFA=Free Fatty AcidFT=Fischer-Tropsch fuelFAME=Fatty Acids and Methyl EstersH2=HydrogenH2O=WaterH2S=Hydrogen SulphideHCl=Hydrochloric acidH2SO4=Sulphuric AcidIC=Internal CombustionKOH=Potassium HydroxideLPG=Liquefied Petroleum GasMTBE=Methyl Tert-Butyl EtherNH3=AmmoniaNOx=Oxides of NitrogenNaOH=Sodium HydroxideNaOCH3=Sodium MethoxideOECD=Organization for Economic Cooperation and DevelopmentPAH=Polycyclic Aromatic HydrocarbonR&D=Research & DevelopmentDisclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsShobhit KhannaShobhit Khanna is working as a Senior Education Officer in defence, India and having 13 years of experience in designing and implementing effective training programs and curriculum for various academies that are not just academically rigorous but also attuned to the practical requirements of the real world. He has completed his Master’s degree in Thermal Engineering from IIT Madras. He is pursing Doctoral degree in the field of Mechanical Engineering from Amity University Madhya ","PeriodicalId":11580,"journal":{"name":"Energy Sources, Part A: Recovery, Utilization, and Environmental Effects","volume":"229 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135901783","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 : 2023-10-02DOI: 10.1080/15567036.2023.2271415
Meiqi Wei, Rujun Zha, Jitong Wang, Hao Ling
ABSTRACTMesophase pitch (MP) is an important carbon material precursor with excellent physical performance and has a wide application in new energy utilization field. However, the current preparation process leads to a high quinoline-insoluble (QI) content in the MP, limiting its application. Here, we use two-stage thermal treatment to slow the degree of polycondensation during the formation of the MP. The two-stage thermal treatment can facilitate the formation of MP and limit the generation of QI. Moreover, the low content of polycyclic aromatic hydrocarbons (PAHs) in the liquid by-products indicates that the degree of thermal cracking of the feedstock becomes milder. The high content of cycloparaffins in gaseous by-products is due to the better polycondensation of the feedstock. Therefore, a wide area streamlined MP is prepared, which has a high mesophase content (96.8%), a low QI content (20.6%) and a good crystal structure (Lc = 57.37 Å, N = 17.64, n = 99.53). At last, a possible mechanism of MP sample formation is discussed, which will provide an insight in the optimization of MP preparation process.KEYWORDS: Mesophase pitchfurfural extraction oiltwo-stage thermal treatmentquinoline insoluble substanceGC-MS AcknowledgementsThis work was supported by the National Natural Science Foundation of China [Grant NO. 22008071].Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the National Natural Science Foundation of China [22008071].Notes on contributorsMeiqi WeiMeiqi Wei is a master's student in Chemical Engineering and Technology at East China University of Science and Technology. She graduated from Zhejiang University of Science and Technology with a bachelor degree in Safety Engineering. Her research interests include mesophase pitch, polycyclic aromatic hydrocarbons and two-stage thermal treatment.Rujun ZhaRujun Zha holds the position of experimentalist within the College of Chemical Engineering at East China University of Science and Technology. He graduated with a Master degree in Chemical Engineering and Technology from East China University of Science and Technology. His research interests include colored binders and styrene butadiene styrene block polymer.Jitong WangJitong Wang is a full professor in the College of Chemical Engineering at East China University of Science and Technology. She graduated from East China University of Science and Technology with a PhD in Chemical Technology. Her areas of interest in research include 2D nanomaterials, energy storage systems, and functionalized carbon nanosheets.Hao LingHao Ling is a full professor in the College of Chemical Engineering at East China University of Science and Technology. He graduated from East China University of Science and Technology with a PhD in Chemical Technology. His research focuses on various fields, including divided-wall columns, deep processing of heavy oil, and asphalt modifie
摘要中间相沥青(MP)是一种重要的碳材料前驱体,具有优异的物理性能,在新能源利用领域有着广泛的应用。然而,目前的制备工艺导致MP中喹啉不溶性(QI)含量高,限制了其应用。在这里,我们使用两阶段热处理来减缓MP形成过程中的缩聚程度。两段热处理有利于MP的形成,限制了QI的生成。此外,液态副产物中多环芳烃(PAHs)的含量较低,表明原料的热裂解程度较轻。气态副产物中环石蜡含量高是由于原料的缩聚效果较好。因此,制备了宽面积流线型MP,其中间相含量高(96.8%),QI含量低(20.6%),晶体结构良好(Lc = 57.37 Å, N = 17.64, N = 99.53)。最后讨论了MP样品形成的可能机理,为MP制备工艺的优化提供参考。关键词:中间相沥青糠醛萃取油两段热处理喹啉不溶性物质gc - ms22008071)。披露声明作者未报告潜在的利益冲突。本研究得到国家自然科学基金资助[22008071]。魏梅琪,华东理工大学化学工程与技术专业硕士研究生。她毕业于浙江科技大学,获得安全工程学士学位。主要研究方向为中间相沥青、多环芳烃和两段热处理。查如军,华东理工大学化学工程学院实验研究员。毕业于华东理工大学化学工程与技术专业,获硕士学位。主要研究方向为有色粘结剂和丁二烯-苯乙烯嵌段聚合物。王继同,华东理工大学化学工程学院正教授。她毕业于华东理工大学化学技术专业,获博士学位。她感兴趣的研究领域包括二维纳米材料、能量存储系统和功能化碳纳米片。郝凌,华东理工大学化学工程学院正教授。他毕业于华东理工大学化学技术专业,获博士学位。主要研究领域包括隔墙柱、重油深加工、沥青改性剂等。
{"title":"Effect of two-stage thermal treatment on the reduction of quinoline-insoluble in Mesophase pitch","authors":"Meiqi Wei, Rujun Zha, Jitong Wang, Hao Ling","doi":"10.1080/15567036.2023.2271415","DOIUrl":"https://doi.org/10.1080/15567036.2023.2271415","url":null,"abstract":"ABSTRACTMesophase pitch (MP) is an important carbon material precursor with excellent physical performance and has a wide application in new energy utilization field. However, the current preparation process leads to a high quinoline-insoluble (QI) content in the MP, limiting its application. Here, we use two-stage thermal treatment to slow the degree of polycondensation during the formation of the MP. The two-stage thermal treatment can facilitate the formation of MP and limit the generation of QI. Moreover, the low content of polycyclic aromatic hydrocarbons (PAHs) in the liquid by-products indicates that the degree of thermal cracking of the feedstock becomes milder. The high content of cycloparaffins in gaseous by-products is due to the better polycondensation of the feedstock. Therefore, a wide area streamlined MP is prepared, which has a high mesophase content (96.8%), a low QI content (20.6%) and a good crystal structure (Lc = 57.37 Å, N = 17.64, n = 99.53). At last, a possible mechanism of MP sample formation is discussed, which will provide an insight in the optimization of MP preparation process.KEYWORDS: Mesophase pitchfurfural extraction oiltwo-stage thermal treatmentquinoline insoluble substanceGC-MS AcknowledgementsThis work was supported by the National Natural Science Foundation of China [Grant NO. 22008071].Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the National Natural Science Foundation of China [22008071].Notes on contributorsMeiqi WeiMeiqi Wei is a master's student in Chemical Engineering and Technology at East China University of Science and Technology. She graduated from Zhejiang University of Science and Technology with a bachelor degree in Safety Engineering. Her research interests include mesophase pitch, polycyclic aromatic hydrocarbons and two-stage thermal treatment.Rujun ZhaRujun Zha holds the position of experimentalist within the College of Chemical Engineering at East China University of Science and Technology. He graduated with a Master degree in Chemical Engineering and Technology from East China University of Science and Technology. His research interests include colored binders and styrene butadiene styrene block polymer.Jitong WangJitong Wang is a full professor in the College of Chemical Engineering at East China University of Science and Technology. She graduated from East China University of Science and Technology with a PhD in Chemical Technology. Her areas of interest in research include 2D nanomaterials, energy storage systems, and functionalized carbon nanosheets.Hao LingHao Ling is a full professor in the College of Chemical Engineering at East China University of Science and Technology. He graduated from East China University of Science and Technology with a PhD in Chemical Technology. His research focuses on various fields, including divided-wall columns, deep processing of heavy oil, and asphalt modifie","PeriodicalId":11580,"journal":{"name":"Energy Sources, Part A: Recovery, Utilization, and Environmental Effects","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135901782","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 : 2023-10-02DOI: 10.1080/15567036.2023.2268572
Kanak Chandra Sarma, Biswajit Nath, Agnimitra Biswas, Rahul Dev Misra
ABSTRACTA trending technology that is being employed to generate hydro energy from low-flow stream reserves is the Savonius-alike hydrokinetic turbine (SAHT). Clearance between the stages of a dual-stage two-bladed SAHT was found to improve its performance at low flow speeds; however, the impact of clearance on the triple-bladed configuration of SAHT was not studied earlier. In this paper, a triple blade dual stage configuration of SAHT is designed, and its performance is investigated in a water flume under various stage clearances (0,5,10,15 and 20 mm), low flow speeds (0.45,0.55 and 0.65 m/s) and different brake loads. Detailed turbine performance under different design and off-design conditions are investigated to obtain meaningful performance insights. The findings show that torque production by the turbine increases with the increase of brake load, with maximum hydrodynamic torque generated at the highest brake load. The highest coefficient of performance and torque of 0.071 and 0.261 are obtained at a stage clearance of 5 mm, tip speed ratio of 0.273, and free-stream flow speed of 0.55 m/s. The present SAHT under design condition has improved performance compared to a dual blade dual stage SAHT exhibiting a wider tip speed ratio range for its application in low flow stream reserves. Further, this turbine may also be recommended for torque generation to work as a motor in a flow speed condition less than 0.5 m/s. The novelty of this work is the application of an additional flow control measure in the form of flow-through clearance to negotiate vertical water thrust through the clearance and exert additional pressure on the advancing blades of the SAHT in the upper stage.KEYWORDS: Savonius-alike hydrokinetic turbinebrake loadscoefficient of performanceflow speedstage clearance Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationNotes on contributorsKanak Chandra SarmaMr. Kanak Chandra Sarma, Ph.D scholar of the National Institute of Technology, Silchar, Assam, India and Lecturer (Senior Scale) of Mechanical Engineering at the Silchar Polytechnic College, Assam, India. Mr. Sarma received his B.Tech. in Mechanical Engineering from Jorhat Engineering College , Assam and his M.Tech. from National Institute of technology, Silchar, Assam. Currently, he is Pursuing Ph.D. in Mechanical Engineering from National Institute of Technology, Silchar, Assam.Biswajit NathMr. Biswajit Nath, Ph.D scholar of the National Institute of Technology, Silchar, Assam, India. He received his B.Tech. in Mechanical Engineering from Anna University, Chennai, Tamil Nadu, India and his M.Tech. from Karunya Institute of Technology and Sciences, Coimbatore, Tamil Nadu, India. Currently, he is Pursuing Ph.D. in Mechanical Engineering from National Institute of technology, Silchar, Assam.Agnimitra BiswasDr. Agnimitra Biswas did his B.E. in Mechanical Engineering from Regional Engineering College Silchar in 2001, M.Tech in Ther
应用于从低流量流储备中产生水能的趋势技术是类似savonius的水动力涡轮机(SAHT)。研究发现,双级双叶片SAHT的两级间隙可以改善其在低流速下的性能;然而,间隙对SAHT三叶片结构的影响尚未得到较早的研究。本文设计了一种三叶双级SAHT结构,并在水槽中研究了不同级隙(0、5、10、15和20 mm)、低流速(0.45、0.55和0.65 m/s)和不同制动载荷下SAHT的性能。详细研究了不同设计和非设计条件下的涡轮性能,以获得有意义的性能见解。结果表明:涡轮产生的扭矩随制动载荷的增大而增大,在最高制动载荷时产生的流体动力扭矩最大;当级隙为5 mm、叶尖速比为0.273、自由流速度为0.55 m/s时,性能系数和转矩分别为0.071和0.261。与双叶片双级SAHT相比,目前设计条件下的SAHT性能得到了改善,在低流量储备条件下,其叶尖速比范围更大。此外,该涡轮还可以推荐用于在小于0.5 m/s的流速条件下作为电机进行转矩产生。这项工作的新颖之处在于采用了一种额外的流动控制措施,以流动间隙的形式来调节通过间隙的垂直水推力,并在上部SAHT的推进叶片上施加额外的压力。关键词:savonius -类水动力涡轮制动负载性能效率流速级间隙披露声明作者未报告潜在的利益冲突。关于贡献者的说明:卡纳克·钱德拉·萨尔玛。Kanak Chandra Sarma,印度阿萨姆邦西尔查尔国立理工学院博士学者,印度阿萨姆邦西尔查尔理工学院机械工程高级讲师。Sarma先生获得了学士学位。在阿萨姆邦乔哈特工程学院获得机械工程硕士学位。来自阿萨姆邦西尔查尔的国立理工学院。目前,他正在攻读阿萨姆邦西尔查尔国立理工学院机械工程博士学位。Biswajit NathMr。比斯瓦吉特·纳特,印度阿萨姆邦西尔查尔国立理工学院博士学者。他获得了学士学位。在印度泰米尔纳德邦金奈的安娜大学获得机械工程硕士学位。来自印度泰米尔纳德邦哥印拜陀Karunya技术与科学研究所。目前,他正在攻读阿萨姆邦西尔查尔国家技术学院机械工程博士学位。Agnimitra BiswasDr。Agnimitra Biswas于2001年在Silchar地区工程学院获得机械工程学士学位,2007年在Silchar国立技术学院获得热工程硕士学位,2010年在NIT Silchar获得机械工程博士学位。他的研究方向是垂直轴风力涡轮机,使用实验和计算方法。他有超过16年的教学和研究经验。目前,他自2022年7月起担任NIT Silchar ME系副教授。Rahul Dev MisraDr。Rahul Dev Misra从Jorhat Engineering获得了机械工程学士学位。1991年Dibrugarh大学下属学院。他于1996年在印度理工学院德里分校获得能源研究专业硕士学位。2004年获美国理工学院鲁尔基分校博士学位。Misra博士于1992年加入西尔查尔国立理工学院(原区域工程学院)机械工程系,担任讲师。现任系教授(HAG)。
{"title":"Design and performance investigation of a triple blade dual stage Savonius-alike hydrokinetic turbine from low flow stream reserves","authors":"Kanak Chandra Sarma, Biswajit Nath, Agnimitra Biswas, Rahul Dev Misra","doi":"10.1080/15567036.2023.2268572","DOIUrl":"https://doi.org/10.1080/15567036.2023.2268572","url":null,"abstract":"ABSTRACTA trending technology that is being employed to generate hydro energy from low-flow stream reserves is the Savonius-alike hydrokinetic turbine (SAHT). Clearance between the stages of a dual-stage two-bladed SAHT was found to improve its performance at low flow speeds; however, the impact of clearance on the triple-bladed configuration of SAHT was not studied earlier. In this paper, a triple blade dual stage configuration of SAHT is designed, and its performance is investigated in a water flume under various stage clearances (0,5,10,15 and 20 mm), low flow speeds (0.45,0.55 and 0.65 m/s) and different brake loads. Detailed turbine performance under different design and off-design conditions are investigated to obtain meaningful performance insights. The findings show that torque production by the turbine increases with the increase of brake load, with maximum hydrodynamic torque generated at the highest brake load. The highest coefficient of performance and torque of 0.071 and 0.261 are obtained at a stage clearance of 5 mm, tip speed ratio of 0.273, and free-stream flow speed of 0.55 m/s. The present SAHT under design condition has improved performance compared to a dual blade dual stage SAHT exhibiting a wider tip speed ratio range for its application in low flow stream reserves. Further, this turbine may also be recommended for torque generation to work as a motor in a flow speed condition less than 0.5 m/s. The novelty of this work is the application of an additional flow control measure in the form of flow-through clearance to negotiate vertical water thrust through the clearance and exert additional pressure on the advancing blades of the SAHT in the upper stage.KEYWORDS: Savonius-alike hydrokinetic turbinebrake loadscoefficient of performanceflow speedstage clearance Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationNotes on contributorsKanak Chandra SarmaMr. Kanak Chandra Sarma, Ph.D scholar of the National Institute of Technology, Silchar, Assam, India and Lecturer (Senior Scale) of Mechanical Engineering at the Silchar Polytechnic College, Assam, India. Mr. Sarma received his B.Tech. in Mechanical Engineering from Jorhat Engineering College , Assam and his M.Tech. from National Institute of technology, Silchar, Assam. Currently, he is Pursuing Ph.D. in Mechanical Engineering from National Institute of Technology, Silchar, Assam.Biswajit NathMr. Biswajit Nath, Ph.D scholar of the National Institute of Technology, Silchar, Assam, India. He received his B.Tech. in Mechanical Engineering from Anna University, Chennai, Tamil Nadu, India and his M.Tech. from Karunya Institute of Technology and Sciences, Coimbatore, Tamil Nadu, India. Currently, he is Pursuing Ph.D. in Mechanical Engineering from National Institute of technology, Silchar, Assam.Agnimitra BiswasDr. Agnimitra Biswas did his B.E. in Mechanical Engineering from Regional Engineering College Silchar in 2001, M.Tech in Ther","PeriodicalId":11580,"journal":{"name":"Energy Sources, Part A: Recovery, Utilization, and Environmental Effects","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135902589","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 : 2023-10-02DOI: 10.1080/15567036.2023.2273406
Hong Zeng, Kuo Jiang, Zefan Wu, Xinlong Liu
ABSTRACTIn order to improve the economic efficiency of the ship when sailing and reduce the engine optimization cost. We propose the Response Surface Methodology (RSM) combined with NSGA-II to optimize the engine parameters. First, a simulation model of a marine four-stroke dual-fuel engine is established in AVL-BOOST software. Then, control parameters such as engine speed, exhaust valve opening (EVO) and compression ratio (CR) are planned by design of experiments. The response surface model was established in Design-Expert software. The significant influence of control parameters on performance parameters was studied by analysis of variance (ANOVA). Finally, with the output power, indicated fuel consumption rate and nitrogen oxide emissions as the optimization objectives. Non-dominated Sequential Genetic Algorithm (NSGA-II) is used to optimize the parameters to improve engine performance and reduce emissions. The results show that the established response surface model has good prediction accuracy. The response surface model visualizes the mathematical relationship between the control parameters and the optimization targets. The ANOVA results show that engine speed, EVO and CR have significant effects on engine performance and emissions. The optimization results show that the engine speed is 793 rpm, the EVO is 145°CA, and the CR is 12.3. Compared to standard settings, the optimized data shows a 3.4% increase in power, a 0.3% reduction in ISFC, and a 6.2% reduction in nitrogen oxide (NOx) emissions. The combination of response surface analysis and NSGA-II algorithm to optimize engine performance and emissions is thereby a feasible method.KEYWORDS: Marine engineresponse surface analysismulti-objective optimizationdesign of experimentsNSGA-II Disclosure statementNo potential conflict of interest was reported by the author(s).Author contributionsHong Zeng, male, received Ph.D. degree in Marine Engineering from Dalian Maritime University, in 2012. Since 2013, he has been working as an Associate Professor with Marine Engineering College, Dalian Maritime University, China. From 2018 to 2019, he was a Visiting Researcher with the Department of Naval Architecture, Ocean and Marine Engineering at the University of Strathclyde, UK. He has published more than 30 journal and conference papers. His research interests include the application of the new generation of information technology in marine engineering, mainly focus on the modeling, simulation and control in marine engineering.Data availability statementThe data used to support the findings of this study are available from the corresponding author upon request.Nomenclature ANN=artificial neural networksANOVA=analysis of varianceATDC=after top dead centerBMEP=exhaust valve openingISFC=indicated specific fuel consumptionNOx=nitrogen oxidesN2=nitrogenNSGA-II=Non-dominated Sequential Genetic AlgorithmO2=oxygenRSM=Response Surface MethodologyAdditional informationFundingThis research was funded by High Tec
目前在青岛港驳船有限公司从事船舶发动机管理和新能源创新工作。
{"title":"Performance research and optimization of marine dual-fuel engine based on RSM and NSGA-II","authors":"Hong Zeng, Kuo Jiang, Zefan Wu, Xinlong Liu","doi":"10.1080/15567036.2023.2273406","DOIUrl":"https://doi.org/10.1080/15567036.2023.2273406","url":null,"abstract":"ABSTRACTIn order to improve the economic efficiency of the ship when sailing and reduce the engine optimization cost. We propose the Response Surface Methodology (RSM) combined with NSGA-II to optimize the engine parameters. First, a simulation model of a marine four-stroke dual-fuel engine is established in AVL-BOOST software. Then, control parameters such as engine speed, exhaust valve opening (EVO) and compression ratio (CR) are planned by design of experiments. The response surface model was established in Design-Expert software. The significant influence of control parameters on performance parameters was studied by analysis of variance (ANOVA). Finally, with the output power, indicated fuel consumption rate and nitrogen oxide emissions as the optimization objectives. Non-dominated Sequential Genetic Algorithm (NSGA-II) is used to optimize the parameters to improve engine performance and reduce emissions. The results show that the established response surface model has good prediction accuracy. The response surface model visualizes the mathematical relationship between the control parameters and the optimization targets. The ANOVA results show that engine speed, EVO and CR have significant effects on engine performance and emissions. The optimization results show that the engine speed is 793 rpm, the EVO is 145°CA, and the CR is 12.3. Compared to standard settings, the optimized data shows a 3.4% increase in power, a 0.3% reduction in ISFC, and a 6.2% reduction in nitrogen oxide (NOx) emissions. The combination of response surface analysis and NSGA-II algorithm to optimize engine performance and emissions is thereby a feasible method.KEYWORDS: Marine engineresponse surface analysismulti-objective optimizationdesign of experimentsNSGA-II Disclosure statementNo potential conflict of interest was reported by the author(s).Author contributionsHong Zeng, male, received Ph.D. degree in Marine Engineering from Dalian Maritime University, in 2012. Since 2013, he has been working as an Associate Professor with Marine Engineering College, Dalian Maritime University, China. From 2018 to 2019, he was a Visiting Researcher with the Department of Naval Architecture, Ocean and Marine Engineering at the University of Strathclyde, UK. He has published more than 30 journal and conference papers. His research interests include the application of the new generation of information technology in marine engineering, mainly focus on the modeling, simulation and control in marine engineering.Data availability statementThe data used to support the findings of this study are available from the corresponding author upon request.Nomenclature ANN=artificial neural networksANOVA=analysis of varianceATDC=after top dead centerBMEP=exhaust valve openingISFC=indicated specific fuel consumptionNOx=nitrogen oxidesN2=nitrogenNSGA-II=Non-dominated Sequential Genetic AlgorithmO2=oxygenRSM=Response Surface MethodologyAdditional informationFundingThis research was funded by High Tec","PeriodicalId":11580,"journal":{"name":"Energy Sources, Part A: Recovery, Utilization, and Environmental Effects","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949798","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}
ABSTRACTThe Li3OCl solid electrolyte was synthesized in the present study via the hydrothermal method. In order to investigate the effect of water on the stability of the Li3OCl phase and reduce the amount of secondary hydroxide phases, different molar ratios of water were added to the precursors during the synthesis procedures. Employing XRD, DSC, FE-SEM, EIS, and CV techniques revealed that the LiCl: LiOH: H2O (1:2:10) molar ratio has better phase stability and fewer undesired hydroxide phases. The DSC results also showed that during the first heat treatment cycle, the Lix(OH)yClz phases were converted to the Li3OCl phase. After heat treatment, the final structure was characterized as a glass-ceramic structure. At 60°C and 110°C, respectively, the synthesized Li3OCl reached an ionic conductivity of 5.0 × 10−2 mS cm−1 and 0.76 mS cm−1. Also, the activation energy of 0.27 eV in the 60–110°C temperature range was recorded for the synthesized Li3OCl. The chemical stability of the synthesized Li3OCl was confirmed during lithiation/delithiation from −1.5 to 4 V at 130°C.KEYWORDS: Anti-perovskiteelectrochemical stabilityhydrothermal synthesishydroxide phasessolid electrolytes AcknowledgementsWe thank the Materials and Energy Research Center, Iran, for the support of this work.Disclosure statementNo potential conflict of interest was reported by the author(s).Author contributionsResearch, material preparation, experimental sections, data collection, data interpretation, and original manuscript writing were done by Aref Ghanbari. Supervision, funding acquisition, conceptualization, results interpretation, manuscript reviewing, and publication-version approval are conducted by Zahra Khakpour. Supervision, methodology, and funding acquisition were done by Aida Faeghinia and Abouzar Massoudi.All authors have read and agreed to the published version of the manuscript.Data availability statementAll data and analysis are available upon request.Additional informationFundingNo funding institutions from the governmental, commercial, or nonprofit sectors contributed any specific grants for this study. No funding institutions from the governmental, commercial, or nonprofit sectors contributed any specific grants for this study.Notes on contributorsAref GhanbariAref Ghanbari, P.h.D student at Materials and Energy Research Center, Ceramic Department. The thesis is concerned with the energy storage, and Li-ion solid state batteries problems.Zahra KhakpourDr. Zahra Khakpour, is the corresponding author and is an assistant professor at Materials and Energy Research Center. She worked as a research scientist in area includes materials and nanomaterials characterization in the Fuel cell, batteries and photo catalyst systems.Aida FaeghiniaDr. Aida Faeghinia, is currently associate Professor at Materials and Energy Research Center.Abouzar MassoudiDr. Abouzar Massoudi, is currently assistant Professor at Materials and Energy Research Center.
{"title":"Investigating the amount of water on reducing Li <sub>x</sub> (OH) <sub>y</sub> Cl <sub>z</sub> hydroxide phases in the synthesis of Li <sub>3</sub> OCl anti-perovskite as a solid electrolyte in Li-ion batteries","authors":"Aref Ghanbari, Zahra Khakpour, Aida Faeghinia, Abouzar Massoudi","doi":"10.1080/15567036.2023.2275710","DOIUrl":"https://doi.org/10.1080/15567036.2023.2275710","url":null,"abstract":"ABSTRACTThe Li3OCl solid electrolyte was synthesized in the present study via the hydrothermal method. In order to investigate the effect of water on the stability of the Li3OCl phase and reduce the amount of secondary hydroxide phases, different molar ratios of water were added to the precursors during the synthesis procedures. Employing XRD, DSC, FE-SEM, EIS, and CV techniques revealed that the LiCl: LiOH: H2O (1:2:10) molar ratio has better phase stability and fewer undesired hydroxide phases. The DSC results also showed that during the first heat treatment cycle, the Lix(OH)yClz phases were converted to the Li3OCl phase. After heat treatment, the final structure was characterized as a glass-ceramic structure. At 60°C and 110°C, respectively, the synthesized Li3OCl reached an ionic conductivity of 5.0 × 10−2 mS cm−1 and 0.76 mS cm−1. Also, the activation energy of 0.27 eV in the 60–110°C temperature range was recorded for the synthesized Li3OCl. The chemical stability of the synthesized Li3OCl was confirmed during lithiation/delithiation from −1.5 to 4 V at 130°C.KEYWORDS: Anti-perovskiteelectrochemical stabilityhydrothermal synthesishydroxide phasessolid electrolytes AcknowledgementsWe thank the Materials and Energy Research Center, Iran, for the support of this work.Disclosure statementNo potential conflict of interest was reported by the author(s).Author contributionsResearch, material preparation, experimental sections, data collection, data interpretation, and original manuscript writing were done by Aref Ghanbari. Supervision, funding acquisition, conceptualization, results interpretation, manuscript reviewing, and publication-version approval are conducted by Zahra Khakpour. Supervision, methodology, and funding acquisition were done by Aida Faeghinia and Abouzar Massoudi.All authors have read and agreed to the published version of the manuscript.Data availability statementAll data and analysis are available upon request.Additional informationFundingNo funding institutions from the governmental, commercial, or nonprofit sectors contributed any specific grants for this study. No funding institutions from the governmental, commercial, or nonprofit sectors contributed any specific grants for this study.Notes on contributorsAref GhanbariAref Ghanbari, P.h.D student at Materials and Energy Research Center, Ceramic Department. The thesis is concerned with the energy storage, and Li-ion solid state batteries problems.Zahra KhakpourDr. Zahra Khakpour, is the corresponding author and is an assistant professor at Materials and Energy Research Center. She worked as a research scientist in area includes materials and nanomaterials characterization in the Fuel cell, batteries and photo catalyst systems.Aida FaeghiniaDr. Aida Faeghinia, is currently associate Professor at Materials and Energy Research Center.Abouzar MassoudiDr. Abouzar Massoudi, is currently assistant Professor at Materials and Energy Research Center.","PeriodicalId":11580,"journal":{"name":"Energy Sources, Part A: Recovery, Utilization, and Environmental Effects","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949819","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 : 2023-10-02DOI: 10.1080/15567036.2023.2276385
Biao Lu, Navid Razmjooy
ABSTRACTLoad control and cost optimization are considered to be crucial in tri-generation or combined cooling, heating, and power (CCHP) systems. In this study, an inventive CCHP system employs an FC system as its first mover and includes a heat exchanger, a heat recovery, as well as an auxiliary boiler, an electric chiller, and an absorption chiller. The electrical grid is linked to this system. The idea here is to maximize the system’s performance from a financial perspective and to make the annual expenditure of the system minimum over a 20–year period that is considered as the cycle life-span. It is a multi-objective optimization problem which is optimized using a newly introduced metaheuristic optimization method and a Fractional-order future search optimizer. The findings of this study are used to divine an ideal configuration of the CCHP. Finally, to demonstrate the higher efficiency of the suggested method, a comparison should be conducted among the optimization results of the fractional-order-based future search algorithm, the results of Non-dominated Sorting Genetic Algorithm II (NSGA-II), and standard future search algorithms in previous studies. Based on the results presented, the proposed Fractional-order Future Search Algorithm (FOFSA) was able to optimize the performance of a PEMFC-based CCHP system more effectively than conventional methods. The system’s exergy efficiency was found to decrease from 52% at 793 mA/cm2 current density to 36% at 1000 mA/cm2 current density. However, with the application of FOFSA, the suggested optimal system had a higher exergy efficiency of 41.6% and a yearly cost of $2765, resulting in the maximum annual greenhouse gas (GHG) reduction of 4.48E6 g. Therefore, in summary, the proposed FOFSA yielded an optimized CCHP system configuration that had higher energy efficiency, lower annual cost, and reduced GHG emissions. These findings highlight the effectiveness of the FOFSA method in optimizing the performance of PEMFC-based CCHP systems.KEYWORDS: Combined heatingcoolingand power cycle; proton exchange membranefuel cell; economic performanceannual cost; fractional-order future search algorithm Nomenclature Symbol=ExplanationCCHP=Combined cooling, heating, and powerNSGA-II=Non-dominated Sorting Genetic Algorithm IIFOFSA=Fractional-order Future Search AlgorithmGHG=Greenhouse gasIMPO=Improved marine predators optimizerPROX=Preferential oxidationPCM=Phase change materialDAC=Desiccant air conditioningHX=Heat-exchangerMEA=Membrane-electrode assemblyNs=The connected cells’ quantityEN=The open-circuit Nernst relation (V)Vloss=The overall voltage loss (V)Vcon=Concentration loss (V)Vact=Activation loss (V)VΩ=Ohmic loss (V)EN=The stack output voltage (V)E0=The open-circuit voltage of the cell (V)F=The Faraday’s constant (C/mol)R=The universal gas constant (J/mol.K)T=The operating temperaturePO2=The partial pressure of O2 (Pa)PH2=The partial pressure of H2 (Pa)PH2Oc=The partial pressure of steam (Pa)Rhc=The vapor re
{"title":"A modified fractional‑order-based future search algorithm for performance enhancement of a PEMFC-based CCHP","authors":"Biao Lu, Navid Razmjooy","doi":"10.1080/15567036.2023.2276385","DOIUrl":"https://doi.org/10.1080/15567036.2023.2276385","url":null,"abstract":"ABSTRACTLoad control and cost optimization are considered to be crucial in tri-generation or combined cooling, heating, and power (CCHP) systems. In this study, an inventive CCHP system employs an FC system as its first mover and includes a heat exchanger, a heat recovery, as well as an auxiliary boiler, an electric chiller, and an absorption chiller. The electrical grid is linked to this system. The idea here is to maximize the system’s performance from a financial perspective and to make the annual expenditure of the system minimum over a 20–year period that is considered as the cycle life-span. It is a multi-objective optimization problem which is optimized using a newly introduced metaheuristic optimization method and a Fractional-order future search optimizer. The findings of this study are used to divine an ideal configuration of the CCHP. Finally, to demonstrate the higher efficiency of the suggested method, a comparison should be conducted among the optimization results of the fractional-order-based future search algorithm, the results of Non-dominated Sorting Genetic Algorithm II (NSGA-II), and standard future search algorithms in previous studies. Based on the results presented, the proposed Fractional-order Future Search Algorithm (FOFSA) was able to optimize the performance of a PEMFC-based CCHP system more effectively than conventional methods. The system’s exergy efficiency was found to decrease from 52% at 793 mA/cm2 current density to 36% at 1000 mA/cm2 current density. However, with the application of FOFSA, the suggested optimal system had a higher exergy efficiency of 41.6% and a yearly cost of $2765, resulting in the maximum annual greenhouse gas (GHG) reduction of 4.48E6 g. Therefore, in summary, the proposed FOFSA yielded an optimized CCHP system configuration that had higher energy efficiency, lower annual cost, and reduced GHG emissions. These findings highlight the effectiveness of the FOFSA method in optimizing the performance of PEMFC-based CCHP systems.KEYWORDS: Combined heatingcoolingand power cycle; proton exchange membranefuel cell; economic performanceannual cost; fractional-order future search algorithm Nomenclature Symbol=ExplanationCCHP=Combined cooling, heating, and powerNSGA-II=Non-dominated Sorting Genetic Algorithm IIFOFSA=Fractional-order Future Search AlgorithmGHG=Greenhouse gasIMPO=Improved marine predators optimizerPROX=Preferential oxidationPCM=Phase change materialDAC=Desiccant air conditioningHX=Heat-exchangerMEA=Membrane-electrode assemblyNs=The connected cells’ quantityEN=The open-circuit Nernst relation (V)Vloss=The overall voltage loss (V)Vcon=Concentration loss (V)Vact=Activation loss (V)VΩ=Ohmic loss (V)EN=The stack output voltage (V)E0=The open-circuit voltage of the cell (V)F=The Faraday’s constant (C/mol)R=The universal gas constant (J/mol.K)T=The operating temperaturePO2=The partial pressure of O2 (Pa)PH2=The partial pressure of H2 (Pa)PH2Oc=The partial pressure of steam (Pa)Rhc=The vapor re","PeriodicalId":11580,"journal":{"name":"Energy Sources, Part A: Recovery, Utilization, and Environmental Effects","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949822","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 : 2023-10-02DOI: 10.1080/15567036.2023.2276902
Qi Zhang, Deli Zhang, Zhijing Sun, Fang Wang, Jiaqi Zhang, Rui Ma, Weiming Yi
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Pub Date : 2023-10-02DOI: 10.1080/15567036.2023.2264228
S. A. Kedar, Ganesh Vijay More, D. S. Watvisave, H. M. Shinde
ABSTRACTSolar air heating system plays an important role in industries. However, in the solar air heating system efficiency considered as important parameters of the solar thermal systems, in particular, the solar air heaters (SAHs) system efficiency is quite low because of the inherent properties of air. The inherent properties include the formation of viscous sublayer, poor heat carrying capacity, etc. The active and passive approaches have been conceded to lessen this problem. The most promising approach is passive because of hassle-free operations. The best passive approaches have been placing ribs, baffles, fins, winglets, etc., on the heat-absorbing surface of SAHs to break the viscous sublayer and promote turbulence. In the present study, various ribs and baffles profiles have been summarized so that they can be used for future research. Along with that, this paper mainly focuses on the need for solar air heating for industrial applications. The performance of SAHs in terms of thermo-hydraulic performance (THP) and thermal and effective efficiencies has been studied and compared for ribs and baffles. Use of fins on the absorber plate and different surface geometries of the absorber plate enhanced the rate of heat transfer during the sunshine hours and use of phase change material for the supply of heat energy during off-sunshine hours. As a result, maximum thermal efficiency of SAHs having ribs, baffles and fins has been found to be 81.9% but the effective efficiency is 28.3% because of large friction factor. Solar air heaters mainly gain popularity in the wide range of industrial applications.KEYWORDS: Bafflesribscorrelationsthermal and effective efficiencythermohydraulic performance Nomenclatures Ap=Area of absorber plate (m2)Cp=Specific heat of air at bulk mean temperature. J/kg KDh=Hydraulic diameter (m)e=Rib/baffle height (m)fs=Friction factor of smooth surfacefr=Friction factor of roughened surfaceH=Duct height (m)h=Heat transfer coefficient (W/m2KI=Heat insolation (W/m2)k=Thermal conductivity of air (W/mK)m=Mass flow rate of air (Kg/s)L=Duct length (m)Nus=Nusselt number of smooth surfaceNur=Nusselt number of roughened surfaceP=Pitch of roughness (m)Pr=Prandtl numberHrrp=Relative rib pitchHrbp=Relative baffle pitch(△p)=Pressure drop (Pascal)Re=Reynolds numberTa=Ambient temperature (k)Tp=Plate temperature (k)Ti=Inlet air temperature (k)To=Outlet air temperature (k)Tsa=Temperature of fluid inside duct (k)Tsun=Sun Temperature (k)W=Duct width (m)Greek Symbols=ρ=Density (kg/m3)μ=Dynamic Viscosity (N.s/m2)α=Angle of attack (0)εp=Emissivity of absorber plateεg=Emissivity of glass sheetτaab=Product of transmittance–absorptanceDisclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsS. A. KedarS. A. Kedar is an Assistant Professor at Mechanical Engineering from MKSSS’s Cummins College of Engineering for Women, Karvenagar Pune. He completed a Master’s degree in Energy Studie
{"title":"A critical review on the various techniques for the thermal performance improvement of solar air heaters","authors":"S. A. Kedar, Ganesh Vijay More, D. S. Watvisave, H. M. Shinde","doi":"10.1080/15567036.2023.2264228","DOIUrl":"https://doi.org/10.1080/15567036.2023.2264228","url":null,"abstract":"ABSTRACTSolar air heating system plays an important role in industries. However, in the solar air heating system efficiency considered as important parameters of the solar thermal systems, in particular, the solar air heaters (SAHs) system efficiency is quite low because of the inherent properties of air. The inherent properties include the formation of viscous sublayer, poor heat carrying capacity, etc. The active and passive approaches have been conceded to lessen this problem. The most promising approach is passive because of hassle-free operations. The best passive approaches have been placing ribs, baffles, fins, winglets, etc., on the heat-absorbing surface of SAHs to break the viscous sublayer and promote turbulence. In the present study, various ribs and baffles profiles have been summarized so that they can be used for future research. Along with that, this paper mainly focuses on the need for solar air heating for industrial applications. The performance of SAHs in terms of thermo-hydraulic performance (THP) and thermal and effective efficiencies has been studied and compared for ribs and baffles. Use of fins on the absorber plate and different surface geometries of the absorber plate enhanced the rate of heat transfer during the sunshine hours and use of phase change material for the supply of heat energy during off-sunshine hours. As a result, maximum thermal efficiency of SAHs having ribs, baffles and fins has been found to be 81.9% but the effective efficiency is 28.3% because of large friction factor. Solar air heaters mainly gain popularity in the wide range of industrial applications.KEYWORDS: Bafflesribscorrelationsthermal and effective efficiencythermohydraulic performance Nomenclatures Ap=Area of absorber plate (m2)Cp=Specific heat of air at bulk mean temperature. J/kg KDh=Hydraulic diameter (m)e=Rib/baffle height (m)fs=Friction factor of smooth surfacefr=Friction factor of roughened surfaceH=Duct height (m)h=Heat transfer coefficient (W/m2KI=Heat insolation (W/m2)k=Thermal conductivity of air (W/mK)m=Mass flow rate of air (Kg/s)L=Duct length (m)Nus=Nusselt number of smooth surfaceNur=Nusselt number of roughened surfaceP=Pitch of roughness (m)Pr=Prandtl numberHrrp=Relative rib pitchHrbp=Relative baffle pitch(△p)=Pressure drop (Pascal)Re=Reynolds numberTa=Ambient temperature (k)Tp=Plate temperature (k)Ti=Inlet air temperature (k)To=Outlet air temperature (k)Tsa=Temperature of fluid inside duct (k)Tsun=Sun Temperature (k)W=Duct width (m)Greek Symbols=ρ=Density (kg/m3)μ=Dynamic Viscosity (N.s/m2)α=Angle of attack (0)εp=Emissivity of absorber plateεg=Emissivity of glass sheetτaab=Product of transmittance–absorptanceDisclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsS. A. KedarS. A. Kedar is an Assistant Professor at Mechanical Engineering from MKSSS’s Cummins College of Engineering for Women, Karvenagar Pune. He completed a Master’s degree in Energy Studie","PeriodicalId":11580,"journal":{"name":"Energy Sources, Part A: Recovery, Utilization, and Environmental Effects","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135901393","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}