Journal of Nuclear Energy Science and Power Generation Technology最新文献_第3页

The Eastern Australian Floods of February 2022 and Its Relationship with Climate Change 2022年2月东澳大利亚洪水及其与气候变化的关系

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2023-04-07 DOI: 10.21926/jept.2302014

J. Callaghan

{"title":"The Eastern Australian Floods of February 2022 and Its Relationship with Climate Change","authors":"J. Callaghan","doi":"10.21926/jept.2302014","DOIUrl":"https://doi.org/10.21926/jept.2302014","url":null,"abstract":"During February 2022 major riverine flooding occurred in an area which has the fastest population growth in Australia. This extended from the Mary River in Southeast Queensland (SEQ) to the Clarence River in Northeast NSW (NENSW). Two centres within this area were devastated by floods unprecedented in living memory. One was the Brisbane Metropolitan area where all-time record daily rainfall in the suburbs flooded creeks. This creek flooding was much worse than that caused by the Brisbane River itself where Wivenhoe Dam played a role in preventing more disastrous flooding. The other was in the Northern New South Wales city of Lismore where rainfall in the Wilsons River catchment exceeded all known rainfall rates there. The structure of the weather system generating the rainfall responsible for these two floods is studied along with the climatology of such events. One event which occurred during 1954 stands out and is examined in detail. A climate shift in 1976 resulted in two decades of relatively benign weather in the region and tourism flourished there due to mild summers and warm winters. The area experienced a huge growth in population with fading memories of past disastrous weather events and huge residential development occurred in flood plain areas. During the twenty-first century these extreme events have returned although so far not as frequent as earlier decades but still result in some residents experiencing multiple flooding events. The 1954 event occurred during an extended period of devastating flood events not experienced in recent decades. With the huge increase in population in this area since the 1970s such a series of events like those in the 1950s would stretch the resources of disaster managers given the problems, they faced in 2022.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88371016","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}

引用次数: 2

Techno-Economic Analysis of Waste-to-Suburban Cooking Energy Critical Infrastructure Development in Southwestern Nigeria 尼日利亚西南部垃圾转化为郊区烹饪能源关键基础设施发展的技术经济分析

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2023-04-03 DOI: 10.21926/jept.2302013

I. Ogundari

{"title":"Techno-Economic Analysis of Waste-to-Suburban Cooking Energy Critical Infrastructure Development in Southwestern Nigeria","authors":"I. Ogundari","doi":"10.21926/jept.2302013","DOIUrl":"https://doi.org/10.21926/jept.2302013","url":null,"abstract":"This study examined the techno-economic specifications for a Waste-to-Suburban Cooking Energy critical infrastructure project in Southwestern Nigeria. Technological and project economic data for the W2E project were obtained from strategic sources and energy project foresight/analysis framework used. The results showed residential upgraded biogas-for-cooking demand of approximately 10,243 m3/month, and municipal solid waste (MSW) input of approximately 80 tonnes/month. The planned biogas plant had estimated costs of US $120,000, a throughput of almost 15,364 m3/month and required 5 acres of land for construction. Project economic viability indicator estimates were: Initial Investment – US $256,500, annual profits – US $40,000, Net Present Value (NPV) – US $142,000, maximum payback period – 7 years, and annual Return-on-Investment (ROI) – 16%. Socio-economic benefits per month included the constant supply of cheap cooking fuel, comparative cooking energy cost savings (biogas-to-LPG usage) of US $3,810, and the elimination of almost 80 tonnes of MSW from the environment. The study concluded that the Waste-2-Biogas critical infrastructure project was technically, environmentally, and socio-economically viable, and was suitable for deployment across suburban Southwestern Nigeria.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75867016","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}

引用次数: 0

Influence of Biogas Digestates on the Composition of Soil Organic Matter 沼气池对土壤有机质组成的影响

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2023-03-22 DOI: 10.21926/jept.2301012

G. Jandl, R. Horn, Richard Schroeder, K. Eckhardt, P. Leinweber

{"title":"Influence of Biogas Digestates on the Composition of Soil Organic Matter","authors":"G. Jandl, R. Horn, Richard Schroeder, K. Eckhardt, P. Leinweber","doi":"10.21926/jept.2301012","DOIUrl":"https://doi.org/10.21926/jept.2301012","url":null,"abstract":"The increasing number of biogas plants with various digested organic materials and output of digestates calls for more detailed investigations of their suitability as soil amendments. In a trial in Northern Germany two replicate plots each were treated with fresh or prolonged fermented digestate to investigate the influence of digestates on the composition of soil organic matter (SOM). The relative proportions of relevant SOM compound classes were determined by pyrolysis-field ionization mass spectrometry (Py-FIMS) and pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). Using these two methods the influence of digestate on the SOM composition was illustrated by the statistical spectra evaluation by principal component analysis. In both digestate-treated plots, the relative proportions of the slowly degradable alkylaromatic compounds and lipids were larger. In contrast, easily degradable carbohydrates and amides and mostly heterocyclic N-compounds were less than in the control plots. However, these SOM differences due to digestates were less pronounced than differences in the composition of autochthonous SOM in the control plots. In one of the treatments N- and alkylaromatic compounds were more abundant in the aggregate core than on the aggregate surface. In contrast, aliphatic compounds were more abundant on the aggregate surface as disclosed by Py-FI and pyrolysis-gas chromatography-mass spectra (Py-GC/MS). In conclusion, increasing amounts of digestate should be critically monitored according to different digestate feedstock, soil types, ecological factors and crop growth/yield.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"213 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73584687","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}

引用次数: 0

Transfer Learning for Fault Detection with Application to Wind Turbine SCADA Data 故障检测的迁移学习及其在风力机SCADA数据中的应用

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2023-03-21 DOI: 10.21926/jept.2301011

S. Simani, S. Farsoni, P. Castaldi

{"title":"Transfer Learning for Fault Detection with Application to Wind Turbine SCADA Data","authors":"S. Simani, S. Farsoni, P. Castaldi","doi":"10.21926/jept.2301011","DOIUrl":"https://doi.org/10.21926/jept.2301011","url":null,"abstract":"The installed wind power capacity is growing worldwide. Remote condition monitoring of wind turbines is employed to achieve higher uptimes and lower maintenance costs. Machine learning models can detect developing damages in wind turbines. Therefore, this paper demonstrates that cross–turbine transfer learning can drastically improve the accuracy of fault detection models in turbines with scarce SCADA data. In particular, it shows that combining the knowledge from turbines with scarce and turbines with plentiful data enables earlier detection of faults than prior art methods. Training fault detection models require large amounts of past and present SCADA data but these data are often unavailable or not representative of the current operation behavior. Newly commissioned wind farms lack SCADA data from the previous operation. Due to control software updates or hardware replacements, older turbines may also lack representative SCADA data. After such events, a turbine’s operation behavior can change significantly so its SCADA data no longer represent its current behavior. Therefore, the work highlights how to reuse and transfer knowledge across wind turbines to overcome this lack of data and enable the earlier detection of faults in wind turbines.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79832638","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}

引用次数: 0

The Liquid-Mediated Synthesis and Performance Evaluation of Li-Zr-F Composite for Ion-Conduction 离子传导Li-Zr-F复合材料的液体合成及性能评价

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2023-02-20 DOI: 10.21926/jept.2301010

J. Moon, S. Thiangtham, Ruijie Zheng, Sicheng Liu, C. Chokradjaroen, Y. Sawada, N. Saito

{"title":"The Liquid-Mediated Synthesis and Performance Evaluation of Li-Zr-F Composite for Ion-Conduction","authors":"J. Moon, S. Thiangtham, Ruijie Zheng, Sicheng Liu, C. Chokradjaroen, Y. Sawada, N. Saito","doi":"10.21926/jept.2301010","DOIUrl":"https://doi.org/10.21926/jept.2301010","url":null,"abstract":"Crystalline lithium fluoride (LiF) has been intensively pursued as potential alternative solid electrolytes (SEs) owing to its excellent chemical and electrochemical oxidation stability, and good deformability. However, due to its low ion conductivity, LiF is still challenging for practical SE applications. Herein, Li-Zr-F composite-based SE by liquid-mediated synthesis is proposed to be studied. methanol (CH3OH) was mainly evaluated as a liquid-mediated precursor for synthesizing Li-Zr-F composites under the stoichiometric proportion of LiF and ZrF4 (2:1 and 2:0.8) and a subsequent annealing process at 25°C/150°C, 50°C/150°C, and 70°C/150°C, respectively. X-ray diffraction results revealed that the Li-Zr-F composites could be crystallized in the three main types of phase formations, including Li2ZrF6 ( ), Li2ZrF6 ( ), and Li4ZrF8 ( ) octahedron structures. In addition, the effect of cation stack sublattice synthesized by methanol mediator on the ion conduction of Li-Zr-F composites was investigated by using electrochemical impedance spectroscopy (EIS). Through the Zr4+-substitution, Li2ZrF6 ( )-based SE exhibited the highest ion conduction which was increased to 2.40 × 10-8 S/cm and 3.89 × 10-8 S/cm under the stoichiometric proportion of LiF and ZrF4 2:0.8 at a dried temperature of 50°C/150°C with, respectively. A 0.21 eV activation energy ( ) was achieved for a battery with Li2ZrF6 ( )-based SE. Meanwhile, LiF exhibited up to 0.78 eV leading to a low kinetic rate for ion diffusion. These results implied that Li2ZrF6 ( )-based SE was successfully synthesized under the optimal condition of CH3OH-50°C/150°C which could improve the ion-conductivity of LiF.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80215976","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}

引用次数: 0

Modeling of Autonomous Microgrid Operated at Medium-Voltage Level and at Constant Frequency and Study of Its Voltage Profile 中压恒频自治微电网建模及电压分布研究

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2023-02-17 DOI: 10.21926/jept.2301009

Daming Zhang

引用次数: 1

Prediction of Wind Loadings on Offshore Wind Turbines Using CFD 基于CFD的海上风力机风荷载预测

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2023-02-09 DOI: 10.21926/jept.2301008

Minghan Bao, N. Abdussamie, Faisal AlThobiani

{"title":"Prediction of Wind Loadings on Offshore Wind Turbines Using CFD","authors":"Minghan Bao, N. Abdussamie, Faisal AlThobiani","doi":"10.21926/jept.2301008","DOIUrl":"https://doi.org/10.21926/jept.2301008","url":null,"abstract":"Analysing the structural response of offshore wind turbines (OWTs) requires a robust method to estimate environmental loadings associated with extreme weather conditions. This study aimed to accurately predict wind loadings on a non-rotating OWT using a Computational Fluid Dynamics (CFD) code, Ansys Fluent package. The inlet velocity boundary condition was defined as a uniform inlet wind speed and then as a Normal Wind Profile (NWP). Three large wind speeds of 25 m/s, 40 m/s and 50 m/s were tested with the aid of the RANS equations and the Shear Stress Transport (SST) turbulence model. A thorough mesh convergence study was conducted for both 2D and 3D simulations, and their results were assessed using the Richardson extrapolation method. Overall, the NWP method was found to produce larger wind forces and moments in comparison with the uniform wind speed conditions (on average 52% and 63% higher, respectively), and its predictions were consistent with the estimations obtained using the simplified drag formula recommended by offshore standards (within approx. 7% difference for wind forces). This paper provided the preliminary steps towards investigating the structural integrity of OWTs under extreme weather conditions.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83046634","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}

引用次数: 0

An 800V End to End SiC Powertrain to Accommodate Extremely Fast Charging 一个800V端到端SiC动力总成，以适应极快的充电

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2023-02-08 DOI: 10.21926/jept.2301007

Naireeta Deb, Rajendra Singh

引用次数: 1

Co-development of Low-speed Electric Community Buses for Local Area Revitalization 共同开发低速电动社区巴士振兴地方

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2023-02-02 DOI: 10.21926/jept.2301005

K. Amagai, Hiroto Kotake, Masahiro Munemura, S. Shigeto, M. Horio

{"title":"Co-development of Low-speed Electric Community Buses for Local Area Revitalization","authors":"K. Amagai, Hiroto Kotake, Masahiro Munemura, S. Shigeto, M. Horio","doi":"10.21926/jept.2301005","DOIUrl":"https://doi.org/10.21926/jept.2301005","url":null,"abstract":"This paper describes the development of low-speed electric community buses (LSECBs) designed by the author's group and their spread situation in Japan. LSECBs are electric vehicles that can travel on public roads at speeds of less than 5.56 m/s (20 km/h). The university, local government, local businesses, and residents with a co-design approach developed the LSECBs. They have various advantages such as safety due to low speed and low energy consumption. In particular, the LSECBs have features not found in ordinary vehicles, such as the ability to friendly talk with other passengers in the vehicle and to see the surroundings. The purpose of using LSECBs is mostly for sightseeing, but they are also used to enhance the mobility of elderly people in the community. In Japan, public transportation plans are formulated by each local government, but local governments with weak finances do not provide sufficient financial support to the companies responsible for public transportation. As a result, public transportation services have been reduced or eliminated due to the business conditions of private companies, and many elderly people with reduced mobility, called \"people with shopping difficulties,\" have been left behind. Under these situations, it is necessary to discuss what kind of contribution LSECBs can make. Moreover, the LSECBs require special driving methods so as not to cause traffic congestion when mixed with other ordinal vehicles. In this paper, we report on the development concept, features of the LSECBs, their special driving method, positioning as a transportation policy, and their potential as stainable mobility.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85277249","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}

引用次数: 0

Green Energy Sources Reduce Carbon Footprint of Oil & Gas Industry Processes: A Review 绿色能源减少油气工业过程中的碳足迹:综述

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2023-01-28 DOI: 10.21926/jept.2301004

C. Temizel, Hakki Aydin, F. Hosgor, C. Yegin, C. Kabir

{"title":"Green Energy Sources Reduce Carbon Footprint of Oil & Gas Industry Processes: A Review","authors":"C. Temizel, Hakki Aydin, F. Hosgor, C. Yegin, C. Kabir","doi":"10.21926/jept.2301004","DOIUrl":"https://doi.org/10.21926/jept.2301004","url":null,"abstract":"In recent years, the oil and gas sector has been moving towards green production methods to achieve net-zero emission goals. Governments and corporations have started large-scale initiatives to deploy advanced technologies to reduce carbon footprints and prevent global warming. Herein, we have explored the emerging techniques and methods used in reducing the effects of gas emissions in the oil and gas industry. The transition process from hydrocarbons to renewable energy resources, including solar thermal applications for EOR, thermal energy extraction from hydrocarbon reservoirs, hydrogen generation strategies, and CO2 EOR and storage applications, has also been discussed. Literature information and publicly available data have paved the way to provide the theoretical background, the rationale of use, screening and selection criteria, challenges, and workarounds for these novel energy sources. Systems to integrate green methods into oil and gas processes appear in detail, from screening to implementation. Then, the technical information for integrating these resources under multiple conditions that affect the system's efficiency, such as weather, seasonal temperature changes, wind, and solar exposure, have been investigated. Moreover, added benefits of such incorporation strategies, such as improved economics with minimal effects on capital intensiveness or other burdens on the overall economy, have also been addressed. The transition from fossil fuels to renewable and greener energy resources provided the underlying motivation for this study.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90512171","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}

引用次数: 0