Journal of Nuclear Energy Science and Power Generation Technology最新文献_第6页

From Food to Foot: The Energy and Carbon Flows of the Human Body at Walking and Cycling 从食物到脚:步行和骑车时人体的能量和碳流

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2022-03-10 DOI: 10.21926/jept.2203025

F. Leurent

{"title":"From Food to Foot: The Energy and Carbon Flows of the Human Body at Walking and Cycling","authors":"F. Leurent","doi":"10.21926/jept.2203025","DOIUrl":"https://doi.org/10.21926/jept.2203025","url":null,"abstract":"The carbon footprint of motorized transport modes per unit length traveled encompasses the unit share of the vehicle lifetime emissions, that of the transport infrastructure, and those of the motor energy, considered both from “well to tank” and from “tank to wheel”. In the active modes of transport, i.e., walking and cycling, the counterpart of motor energy is human energy, which is associated with two kinds of carbon flows: the carbon footprint of food intake, – which we call the Food to Body component – and the carbon dioxide emissions of respiration – say the Body to Foot component. In this article, we provide a model in simple mathematical form to assess those carbon flows per unit length. It involves the modal speed in (i) the Metabolic Equivalent of the Task (MET) which gives rise to the energy and carbon flows, and (ii) the ratio of time spent to length travelled. The two influences of speed onto a modal carbon footprint combine in the net MET per unit length, with some compensation. The carbon footprint of food intake varies widely depending on the food diet of individuals. In a numerical study, the Food to Foot carbon emission of walking, cycling, e-scooter riding, and driving a car are estimated and compared to the rest of modal carbon footprint. Under conditions typical of France in the 2010s based on the average food diet and low carbon intensity of electricity, the inclusion of F2F in modal footprints changes the ranking of the modes according to the carbon footprint per unit length.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"261 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73059893","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

Surface Treatment of Flexible Barrier Film for Improved Stability of Organic Photovoltaic Mini Modules 提高有机光伏微型组件稳定性的柔性阻挡膜表面处理

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2022-03-07 DOI: 10.21926/jept.2203023

Clara L. e Silva, B. Miranda, Maria L. Vilela, J. Rodrigues, T. Cunha, Jhonatan A. Dias, G. A. Soares, Vinicius Freitas, R. Vilaça, Luana Wouk, D. Bagnis

{"title":"Surface Treatment of Flexible Barrier Film for Improved Stability of Organic Photovoltaic Mini Modules","authors":"Clara L. e Silva, B. Miranda, Maria L. Vilela, J. Rodrigues, T. Cunha, Jhonatan A. Dias, G. A. Soares, Vinicius Freitas, R. Vilaça, Luana Wouk, D. Bagnis","doi":"10.21926/jept.2203023","DOIUrl":"https://doi.org/10.21926/jept.2203023","url":null,"abstract":"The lifetime and stability of organic photovoltaics (OPVs) are the key factors that influence the technology used to scale up and commercialize OPVs. High-performing and reliable devices are used to fabricate the devices of choice. Materials and methods that can be used to prevent the degradation of organic materials, enabling better OPV applications, are being increasingly researched in recent years. Herein, we present the surface modification process of a commercial, flexible barrier film based on polyethylene terephthalate (PET). A sol-gel deposition method was used to modify the surface. Two scalable coating techniques, spray- and bar-coating, were investigated as the processing methods. Treated films were optically, morphologically, and topologically characterized. The modification of the barrier film surface increased the surface hydrophobicity of the bar-coated and spray-coated treated films. This was validated by the contact angle measurements. OPV roll-to-roll (R2R) mini-modules with 4.2% power conversion efficiency were fabricated and encapsulated with the treated films. The lifetime and stability were assessed by conducting accelerated aging tests based on the ISOS-D-3 protocol. The spray-coating technique provided a more stable layer than the bar-coating technique, and the lifetime of the OPV modules encapsulated in spray-coated treated barrier films was increased. Surface modification has been demonstrated to be a promising approach for not only improving the barrier film properties (resulting in the improved lifetimes of the modules) but also reducing the extents of reflectance losses in the OPV modules post encapsulation.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74684012","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

Risks Associated with the Use of Hydrogen as an Energy Carrier or Source 使用氢作为能源载体或能源的相关风险

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2022-03-03 DOI: 10.21926/jept.2203029

P. Guy, Capelle Julien

引用次数: 1

Artificial Neural Networks and Gradient Boosted Machines Used for Regression to Evaluate Gasification Processes: A Review 人工神经网络和梯度增强机器用于回归评估气化过程:综述

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2022-02-18 DOI: 10.21926/jept.2203027

Owen Sedej, E. Mbonimpa, Trevor W Sleight, J. Slagley

{"title":"Artificial Neural Networks and Gradient Boosted Machines Used for Regression to Evaluate Gasification Processes: A Review","authors":"Owen Sedej, E. Mbonimpa, Trevor W Sleight, J. Slagley","doi":"10.21926/jept.2203027","DOIUrl":"https://doi.org/10.21926/jept.2203027","url":null,"abstract":"Waste-to-Energy technologies have the potential to dramatically improve both the natural and human environment. One type of waste-to-energy technology that has been successful is gasification. There are numerous types of gasification processes and in order to drive understanding and the optimization of these systems, traditional approaches like computational fluid dynamics software have been utilized to model these systems. The modern advent of machine learning models has allowed for accurate and computationally efficient predictions for gasification systems that are informed by numerous experimental and numerical solutions. Two types of machine learning models that have been widely used to solve for quantitative variables that are of predictive interest in gasification systems are gradient boosted machines and artificial neural networks. In this article, the reviewed literature used either gradient boosted machines or artificial neural networks to successfully model gasification systems. The review of such literature allows for a comparison in machine learning model architecture and resultant accuracy as well as an insight into what parameters are being used to inform the models and to make predictions.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73916797","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

A Rechargeable Aqueous Lithium-Air Battery with an Acetic Acid Catholyte Operated at High Pressure 高压下醋酸阴极可充电锂-空气水电池

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2022-02-17 DOI: 10.21926/jept.2201009

Syuma Ichida, Daisuke Mori, S. Taminato, Zhang Tao, Y. Takeda, O. Yamamoto, N. Imanishi

引用次数: 1

Thermo-rechargeable Batteries Fabricated Using Low-cost Materials 使用低成本材料制造热可充电电池

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2022-02-15 DOI: 10.21926/jept.2201011

Arnold Hendharto Widdhiarta, Yousuke Shimaura, I. Nagai, T. Shibata, Y. Moritomo

引用次数: 1

A Large Eddy Simulation Study of Cyclones: The Effects of Interparticle Collisions on Erosion Prediction 气旋的大涡模拟研究:粒子间碰撞对侵蚀预报的影响

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2022-01-31 DOI: 10.21926/jept.2202017

D. Martins, João Rodrigo Andrade, C. Duarte, R. Salvo, F. Souza

引用次数: 1

Operation of AC Microgrids with PV Panels’ Output Power Curtailment for Minimizing the Use of Energy Storage 基于光伏板输出限电的交流微电网运行以减少储能的使用

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2022-01-21 DOI: 10.21926/jept.2201008

Daming Zhang

引用次数: 1

Incentivizing Alternative Fuel Vehicle Transactions: Analysis of Cash-for-Clunkers Transactions for New Alternative Fuel Vehicles 激励替代燃料汽车交易:对新替代燃料汽车旧车换现金交易的分析

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2022-01-14 DOI: 10.21926/jept.2203026

Edmund J. Zolnik

{"title":"Incentivizing Alternative Fuel Vehicle Transactions: Analysis of Cash-for-Clunkers Transactions for New Alternative Fuel Vehicles","authors":"Edmund J. Zolnik","doi":"10.21926/jept.2203026","DOIUrl":"https://doi.org/10.21926/jept.2203026","url":null,"abstract":"Monetary incentives to accelerate the transition of private vehicle fleets to zero emissions promote sustainability in the transportation sector. Clean Cars for America to incentivize transactions for new battery power vehicles is a program in furtherance of sustainable transportation goals in the United States. Unfortunately, data on transactions for new alternative fuel vehicles (AFVs) are scarce so empirical research to explore the costs and/or the benefits of such programs is also scarce. Analysis of transactions for new AFVs from a past, national vehicle retirement program known as Cash for Clunkers provides a rare glimpse into the economic costs and into the environmental benefits of monetary incentives. Analysis of transactions for new AFVs also provides an empirical context for a future, national retirement program such as Clean Cars for America. To that end, the analysis estimates Greenhouse Gas (GHG) emission reduction from a subsample of Cash-for-Clunkers transactions for new AFVs. Overall, incentivizing AFV transactions effectively decreases GHG emissions though regional differences may necessitate dynamic, rather than static, voucher amounts so as to harmonize such differences.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82013739","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

Adapted Time Slice Model of Pinch Analysis for Direct-Indirect Heat Recovery in Buildings 建筑直接-间接热回收掐点分析的自适应时间片模型

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2022-01-13 DOI: 10.21926/jept.2202013

H. Akbari, S. M. Hosseinnia, M. Sorin, C. Reddick, Dominic Laperle

{"title":"Adapted Time Slice Model of Pinch Analysis for Direct-Indirect Heat Recovery in Buildings","authors":"H. Akbari, S. M. Hosseinnia, M. Sorin, C. Reddick, Dominic Laperle","doi":"10.21926/jept.2202013","DOIUrl":"https://doi.org/10.21926/jept.2202013","url":null,"abstract":"Heat integration techniques such as pinch analysis can play a significant role in saving energy in the design of buildings. The application of pinch analysis in this sector encounters difficulties due to the highly time-dependent behavior of energy streams such as waste heat and solar thermal collectors, as well as the possible need for heat storage units (HSUs). The existing pinch models in the literature either bear little relation to reality because they ignore the time dependency of the streams, or they do not respect the pinch analysis minimum temperature difference of the system, which leads to temperature penalties. This study introduces a novel and straightforward adapted time slice model of pinch analysis, beneficial for energy targeting in buildings. First, an algorithm for the selection of the appropriate time slice duration is proposed. Then, additional steps are embedded in the conventional problem table algorithm to account for both direct heat transfer (co-existing streams) and indirect heat transfer (time mismatched streams requiring thermal energy storage). i.e., the modified table includes both external and internal streams, respectively. The detailed application of the proposed model is demonstrated through the analysis of a direct-indirect heat recovery system for a residential test building equipped with waste heat and solar energy, considering a summer’s day. This case study, or sample calculation, determines the HSU specifications, including their design temperatures and volumes. A heat exchanger evaluation quantifies both their number and their thermal conductances, which are an economic indicator of the system capital cost.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82463883","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: 1