Teses / dissertações sobre o tema "Batterie a flux"
Crie uma referência precisa em APA, MLA, Chicago, Harvard, e outros estilos
Veja os 29 melhores trabalhos (teses / dissertações) para estudos sobre o assunto "Batterie a flux".
Ao lado de cada fonte na lista de referências, há um botão "Adicionar à bibliografia". Clique e geraremos automaticamente a citação bibliográfica do trabalho escolhido no estilo de citação de que você precisa: APA, MLA, Harvard, Chicago, Vancouver, etc.
Você também pode baixar o texto completo da publicação científica em formato .pdf e ler o resumo do trabalho online se estiver presente nos metadados.
Veja as teses / dissertações das mais diversas áreas científicas e compile uma bibliografia correta.
Cadiou, Vincent. "Développement de matériaux d'électrodes organiques pour batterie anionique". Thesis, Nantes, 2018. http://www.theses.fr/2018NANT4024/document.
Texto completo da fonteA new generation of organic batteries could partly meet the growing demand for energy storage without depleting natural resources, in contrast to current technologies. Thanks to the structural diversity of organic chemistry, new opportunities exist allowing the development of "anionic rocking chair" batteries, through the integration of p-type organic electrode materials, with the ultimate potentiality to avoid any metals. However, a limited choice of p-type organic materials is reported in the literature. The first objective of this thesis was to synthesize two p-type positive electrode materials, dilithium and magnesium 2,5-dianilinoterephthalates. Particular care has been taken to promote synthesis strategies that best integrate the principles of "green" chemistry. Single crystals of these salts, developed in water, allowed the resolution of their crystalline structure, leading to a better interpretation of their electrochemical mechanisms. In a second step, we developed polymeric p-type materials for negative electrodes called polyviologens. Usually soluble in organic carbonate type electrolyte solvents, we have modified their structures to increase their cycling behavior. The last part of this thesis consisted in optimizing the formulation of the positive and negative electrodes developed during the thesis, in order to assemble efficient "all organic" anionic batteries, which allowed to obtain a cell voltage of 0.7 V
Charyton, Martyna. "Ion exchange coatings for porous separator membranes in RFB applications". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0266.
Texto completo da fonteThis study was focused on the fabrication of a composite anion exchange membrane in an industrially oriented process. From a literature study on different types of ion exchange membranes (IEMs), it can be concluded that both the chemical structure of the membrane as well as their fabrication process affect their ionic-transport properties. A hierarchical, composite structure of the membrane was considered as advantageous over the dense, self-supported membrane. The presented membrane consists of a porous poly(vinyl chloride) (PVC)-silica substrate (600 µm) and a layer of ionomer (20 – 40 µm) applied on top of it. It is designed so that the substrate ensures dimensional stability and limits the amount of anion exchange material needed, allowing for a lower cost of fabrication. The ion-exchange layer was applied on the porous substrate using blade-coating technique and UV-curing which can be easily adopted in a large-scale, roll-to-roll process. Three different approaches are described in the corresponding chapters. Firstly, the ion exchange layer was fabricated by immobilization of a water-soluble polymer – poly(vinyl pyrrolidone) (PVP) in a matric of acrylamides and acrylic resin. All of the used chemicals are commodity reagents, which can be seen as an economic advantage of such coatings over the commercial IEMs. Moreover, varying the content of PVP from 6 wt.% up to 16% allows controlling the ion transport properties of the membrane. Membranes with lower contents of PVP swell less in aqueous media and exhibit permeability to cations in line with the commercial AEM (FAP 450) but with a lower ion conductivity. The performance tests carried out for a benchmark All-Vanadium Redox Flow Battery system (VRFB) demonstrate that PVP-based membranes can reach comparable energy efficiency (EE) to the one of a commercial, benchmark membrane (74.7% versus 73.0% for FAP 450 and 75.0% for Nafion® N115). However, oxidative degradation was observed in an ex-situ stability test. Thus, the next step was to use an ionomer that can also serve as a crosslinking agent, stable in the environment of the vanadium electrolyte. Vinylimidazolium poly(phenylene oxide) (VIMPPO) was synthesized with 50 % of the degree of functionalization. Such ionomer exhibited high ion exchange capacity: 2.4 mmol g-1. In parallel, UV-cured alone VIMPPO was too densely crosslinked and demonstrated high area-specific resistivity. To decrease the resistivity of the membrane, VIMPPO was used in combination with acrylamide monomers. This allowed to decrease the content of the synthesized ionomer. VRFB cycling study showed an improvement of the composite membrane performance in comparison to the PVP-based AEMs. A membrane with 15 wt. % of VIMPPO in the coating layer allowed for high energy efficiency – 75.1 % (at 80 mA cm-2) during the VRFB cycling experiments and capacity retention in line with the results of the commercial IEMs. Nevertheless, some indications of oxidative degradation were still observed. Following the promising study on the VIMPPO, the next generation of the composite membranes was fabricated using VIMPPO without acrylamides in order to secure chemical stability. To prevent excessive density of the crosslinking, VIMPPO was formulated with UV-curable monomers with quaternary ammonium groups. Those monomers can form spacing molecular bridges between the chains of the ionomer leading to its loosened structure. The membrane fabricated using (vinylbenzyl)trimethylammonium chloride allowed to reach significantly enhanced performance in comparison to the commercial IEMs showing higher energy efficiency (77.4 %) and lower capacity decay than in the case of FAP 450 or Nafion® N115. Furthermore, the stability of this type of membranes was better than previously fabricated membranes, allowing to perform long-term cycling experiments (75 cycles at 50 mA cm-2) during which the membranes exhibited stable performance
Parant, Hélène. "Le concept d'électrodes liquides de carbone appliqué au domaine des batteries en flux : étude et application aux matériaux d'intercalation du lithium". Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0726/document.
Texto completo da fonteThis project deals with flow batteries, which are very promising technologies for large scale energy storage, especially for intermittent energies. This work aims at developing new types of electrolytes with carbon particles to enhance power of batteries. This concept is called "liquid electrode" and is implemented in flow batteries with redox lithium intercalation particles in aqueous media. The first objective is to formulate the carbon electrolyte, with a good electronic conductivity (1-4 mS/cm) and a reasonable viscosity. A compromise is reached thanks to the study of the mixing procedure and the carbon type. Conductivity is also studied by impedance spectroscopy and in flow to visualize the strength of the carbon network. The electrolytes are then, tested in a ferrocyanide/iodine millifluidic battery. The conversion of the soluble species is compared with a modelisation. A particular attention is paid to the effect of the flow and the kinetic on the battery intensity. Finally, these carbon electrolytes are used in a particles-based flow battery. For example, a battery LiFePO4{MnO2 demonstrates in flow, an intensity recovery between 5 et 30 mA{cm2 which is around 10 to 100 times higher than values reported in literature
Cazot, Mathilde. "Development of Analytical Techniques for the Investigation of an Organic Redox Flow Battery using a Segmented Cell". Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0116.
Texto completo da fonteRedox Flow Batteries (RFBs) are a promising solution for large-scale and low-cost energy storage necessary to foster the use of intermittent renewable sources. This work investigates a novel RFB chemistry under development at the company Kemiwatt. Based on abundant organic/organo-metallic compounds, this new technology promises the deployment of sustainable and long-lived systems. The study undertakes the building of a thorough knowledge base of the system by developing innovative reliable analytical tools. The investigation started from the evaluation of the main factors influencing the battery performance, which could be conducted ex-situ on each material composing the cell. The two electrolytes were then examined independently under representative operating conditions, by building a symmetric flow cell. Cycling coupled with EIS measurements were performed in this set-up and then analyzed with a porous electrode model. This combined modeling-experimental approach revealed unlike limiting processes in each electrolyte along with precautions to take in the subsequent steps (such as membrane pretreatment and electrolyte protection from light). A segmented cell was built and validated to extend the study to the full cell system. It provided a mapping of the internal currents, which showed high irregularity during cycling. A thorough parameter study could be conducted with the segmented platform, by varying successively the current density, the flow rate, and the temperature. The outcome of this set of experiments would be the construction of an operational map that guides the flow rate adjustment, depending on the power load and the state of charge of the battery. This strategy of flow rate optimization showed promising outcomes at the lab-cell level. It can be easily adapted to real-size systems. Ultimately, an overview of the hydrodynamic behavior at the industrial-cell level was completed by developing a hydraulic modeling and a clear cell as an efficient diagnostic tool
Cazot, Mathilde. "Development of Analytical Techniques for the Investigation of an Organic Redox Flow Battery using a Segmented Cell". Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0116.
Texto completo da fonteRedox Flow Batteries (RFBs) are a promising solution for large-scale and low-cost energy storage necessary to foster the use of intermittent renewable sources. This work investigates a novel RFB chemistry under development at the company Kemiwatt. Based on abundant organic/organo-metallic compounds, this new technology promises the deployment of sustainable and long-lived systems. The study undertakes the building of a thorough knowledge base of the system by developing innovative reliable analytical tools. The investigation started from the evaluation of the main factors influencing the battery performance, which could be conducted ex-situ on each material composing the cell. The two electrolytes were then examined independently under representative operating conditions, by building a symmetric flow cell. Cycling coupled with EIS measurements were performed in this set-up and then analyzed with a porous electrode model. This combined modeling-experimental approach revealed unlike limiting processes in each electrolyte along with precautions to take in the subsequent steps (such as membrane pretreatment and electrolyte protection from light). A segmented cell was built and validated to extend the study to the full cell system. It provided a mapping of the internal currents, which showed high irregularity during cycling. A thorough parameter study could be conducted with the segmented platform, by varying successively the current density, the flow rate, and the temperature. The outcome of this set of experiments would be the construction of an operational map that guides the flow rate adjustment, depending on the power load and the state of charge of the battery. This strategy of flow rate optimization showed promising outcomes at the lab-cell level. It can be easily adapted to real-size systems. Ultimately, an overview of the hydrodynamic behavior at the industrial-cell level was completed by developing a hydraulic modeling and a clear cell as an efficient diagnostic tool
Debert, Maxime. "Stratégies optimales multi-critères, prédictives, temps réel de gestion des flux d'énergie thermique et électrique dans un véhicule hybride". Phd thesis, Université d'Orléans, 2011. http://tel.archives-ouvertes.fr/tel-00867007.
Texto completo da fonteDeschanels, Mathieu. "Développement de systèmes électrochimiques innovants pour applications en batteries à flux circulants". Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTS062.
Texto completo da fonteRedox flow batteries are electrochemical energy storage devices characterized by its ability to dissociate their energy from their power. This property gives these systems a great adaptability facilitating their scalability to develop mass storage devices. These batteries, although having interesting properties, are still limited by their cost and the low energy densities they develop.In this thesis, several axes have been considered to improve their performance. Carbonaceous materials are widely used in these systems (electrodes, semi-solid configuration). Surface modifications allow to adjust the interface properties between the carbonaceous materials and the electrolyte. In a first study, a modification method based on the Diels-Alder reaction is developed. The objective is to propose a simple and adaptable modification protocol for different chemical moieties. In a second study, carbon electrode modification by chemical reduction of diazonium cations is performed with hydrophobic molecules. The objective is to prevent the access of water molecules to the electrode surface to inhibit the electrochemical reduction of water. In a third part, a battery configuration using two different pH in the positive and negative compartment is studied. This configuration should allow a better versatility in the choice of redox couples as well as the development of systems with higher cell voltages
Jouhara, Alia. "De la conception de matériaux d'électrode organiques innovants à leur intégration en batteries "tout organique"". Thesis, Nantes, 2018. http://www.theses.fr/2018NANT4026/document.
Texto completo da fonteMeeting the ever-growing demand for electrical storage devices, without depleting natural resources, requires both superior and “greener” battery technologies. Developing organic batteries could well provide part of the solution since the richness of organic chemistry affords us a multitude of avenues for uncovering innovative electrode materials based on abundant, low-cost chemical elements. Nearly 40 years after the discovery of conductive polymers, long cycling stability in Li-organic batteries has now been achieved. However, the synthesis of high-voltage lithiated organic cathode materials and the synthesis of low-voltage p type organic anode materials is still rather challenging, so very few examples of all-organic cells currently exist. Herein, we first present an innovative approach consisting in the substitution of spectator cations and leading to a significant increase of the redox potential of lithiated organic electrode materials thanks to an inductive effect. These results enable developing an all-organic Li-ion battery able to deliver an output voltage above 2.5 V for more than 300 cycles. We then design two p type organic electrode materials able of being charged at low potentials for developing all-organic Anion-ion batteries able to deliver an output voltage at least 1.5 V. Finally, we present a preliminary study of a new family of potentially bipolar compounds
Rizk, Rania. "Refroidissement passif de batteries lithium pour le stockage d'énergie". Thesis, Normandie, 2018. http://www.theses.fr/2018NORMC228.
Texto completo da fonteThis thesis deals with the passive cooling of lithium-ion batteries. It consists of two large parts. The first part is an experimental and numerical study of the thermal behaviour of a battery and the second part is the experimental study of a passive system for the cooling of several batteries. An experimental test bench was designed to monitor the thermal evolution of batteries subjected to different currents. The prismatic batteries studied are made of lithium-iron-phosphate and have a capacity of 60 Ah. In a first step, the thermal behaviour of a battery subjected to charge / discharge cycles is experimentally characterized. We show that the temperature is not uniform at the surface of the battery and the hottest area is identified. In a second step, a three-dimensional numerical model was developed to predict the temperature at any point of the battery. This thermal model makes it possible to predict in particular the temperatures inside the battery, not measured experimentally and this, for different currents. The model input data are from experimental trials and literature. This phase of thermal characterization of the battery is essential for the design of a cooling system. Finally, an experimental study of a passive cooling system based on heat pipes and finned plates is carried out. Several configurations are tested progressively with improvements leading finally to a system with ten heat pipes with vertical finned plates at the condenser combined with finned plates placed on the faces of the batteries
Alam, Tariq Rizvi. "Modeling and Design of Betavoltaic Batteries". Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/89648.
Texto completo da fontePHD
Rossouw, Francois Gerhardus. "Analysis and design of axial flux permanent magnet wind generator system for direct battery charging applications". Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2726.
Texto completo da fonteIn this study the focus is on the implementation of a coreless axial ux permanent magnet (AFPM) generator for use in a wind generator application with direct battery charging. The wind generator power system is analysed and discussed. The common concerns with AFPM wind generators in recti er-fed direct battery charging applications, such as maximum power point matching and acoustic noise emission, are discussed. In this study the AFPM wind generator is theoretically analysed and the different winding topologies for this type of machine are evaluated. This evaluation is based on a theoretical analysis and con rmed by nite element analysis and practical measurements. It is shown that an AFPM machine equipped with nonoverlapping windings can give a similar performance to that of normal overlapping windings, while using less copper. It is shown in this thesis that the coreless AFPM generator has a relatively low internal phase synchronous inductance resulting in severe problems with regard to maximum power matching and noise. A method is proposed and in detail analysed in this thesis whereby better power point matching is achieved and near-sinusoidal current is obtained using AFPM generators in direct battery charging wind energy systems. The wind generator system's performance is verified with a SimplorerTM simulation package and practical measurements. The calculations from theoretically derived equations are in good agreement with finite element and measured results.
Agbli, Kréhi Serge. "Modélisation multiphysique des flux énergétiques d’un couplage photovoltaïque-électrolyseur PEM-pile à combustible PEM en vue d’une application stationnaire". Thesis, Besançon, 2012. http://www.theses.fr/2012BESA2001/document.
Texto completo da fonteA stand alone multi-source system based on the coupling of photovoltaic energy and both a PEM electrolyser and a PEMFC for stationary application is studied. The system gathers photovoltaic array as main energy source, ultracapacitors and batteries packs in order to smooth respectively fast and medium dynamic by supplying the load or by absorbing photovoltaic source overproduction. Because of the necessity of fuel availability, especially for islanding application like this one, a PEM electrolyser is integrated to the system for in situ hydrogen production.The main purpose being modeling and management of the power flows in order to meet the energy requirement without power cut, a graphical modeling tool namely Energetic Macroscopic Representation (EMR) is used because of its analysis and control strengths. Thanks to the modular feature of the EMR, the different models of each energetic entity of the system are performed before their assembling.By using scale effect, the energetic system sizing is performed according to a household power profile. Then, by the help of the multi-level representation, the maximal control structure (MCS) is deduced from the system EMR model. The electrical reference values of the MCS are generated by applying the power balancing method involving the own dynamic of each source into the energy management strategy. Different behavior modes are taken into account. By considering an irradiance profile for one day, the system is simulated highlighting its suitable behaviour. Moreover, the relevance of the introduced coupling between fuzzy logic controller and the power balancing method is pointed out
Chaabene, Nesrine. "Développement d’une microbatterie redox–flow en milieu liquide ionique". Thesis, Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=http://theses-intra.upmc.fr/modules/resources/download/theses/2019SORUS592.pdf.
Texto completo da fonteThe objective of this thesis is to develop a membraneless redox-flow microbattery using ionic liquids (ILs) as electrolytes. Due to their properties, they are well suited for applications related to energy storage. However, they are very sensitive to moisture, expensive, difficult to synthesize and viscous, making their use at an industrial level difficult. A way of overcoming these drawbacks is to mix the IL with a molecular solvent. In this work, we have studied the electrochemical properties of two aprotic and hydrophobic ILs belonging to 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide family and a protic and hydrophilic IL, ethylammonium nitrate (EAN). We have also studied the influence of molecular solvent (γ-butyrolactone, GBL) addition on the physicochemical properties of the mixtures. Physicochemical properties of two eutectic mixtures: ethaline and Menthol-based DES were investigated in order to compare them with an IL commonly used in electrochemical applications. Electrochemical properties of these ILs and their mixtures with GBL had been studied in the presence of different redox couples in order to select two couples to be tested in a microfluidic cell. Electrical characterizations of different membraneless redox-flow batteries have been carried out using these electrolytic media and electroactive species
Stegmann, Johannes Abraham. "Design and analysis aspects of radial flux air-cored permanent magnet wind generator system for direct battery charging applications". Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5350.
Texto completo da fonteENGLISH ABSTRACT: The electromagnetic and mechanical design aspects of optimally designed doublesided rotor radial flux permanent magnet wind generators with non-overlap aircored (iron-less) stator windings are analysed in this thesis. The wind generator is implemented in a battery charging system for use in rural settlements and farms. The optimal generator and system design is based on an accurate analytical model and is confirmed with finite element analysis. It is shown, amongst other things, that the electromagnetic design and surprisingly not the mechanical design, determines the rotor yoke dimensions and, hence, largely the mass and cost of the generator. Alternative battery charging systems are also considered and discussed.
AFRIKAANSE OPSOMMING: Die elektromagnetiese en meganiese ontwerp aspekte van optimaal ontwerpte dubbel-kant rotor radiale vloed permanente magneet windgenerators met nieoorvleuelende lug kern (sonder yster) statorwindings word in hierdie tesis ontleed. Die windgenerator word geplaas in 'n battery-laai stelsel vir gebruik in landelike nedersettings en plase. Die optimale generator en die stelsel ontwerp is gegrond op 'n akkurate analitiese model en is bevestig met eindige element analise. Daar word onder andere getoon dat die elektromagnetiese ontwerp, en nie die meganiese ontwerp, die rotor juk dimensies en dus grootliks die massa en die koste van die generator, bepaal. Alternatiewe battery-laai stelsels word ook oorweeg en bespreek.
Mkahl, Rania. "Contribution à la modélisation, au dimensionnement et à la gestion des flux énergétiques d’un système de recharge de véhicules électriques : étude de l’interconnexion avec le réseau électrique". Thesis, Belfort-Montbéliard, 2015. http://www.theses.fr/2015BELF0264/document.
Texto completo da fonteThe strong dependence on oil and ecological and environmental constraints force many car manufacturers to develop new research programs for the promotion of electric vehicles (EVs) and associated infrastructures. The embedded batteries into the EVs can be charged by the electrical network or by another source of renewable energy. In this context, the work presented in this thesis aims to study a system of EVs charging using solar energy through photovoltaic panels. To do so, a sizing study of the system has been proposed in order to evaluate the energy needs for an EV and determine the quantity of required energy for its propel. The key elements of the system have been sized: photovoltaic panels, storage battery (Lead-acid) and traction battery (Li-ion). From this sizing study and considering the EV characteristics, we determined the energy quantity required for itspropel. With the aim to study the behavior of each system component and analyze its adequacy with the charging process, a modeling study was conducted, and each element is represented by a mathematical model. The performed analysis and comparison of obtained results (simulation results and experimental results) allowed us to validate the developed models. In addition, this modeling study, allowed the validation of the choice of all components of charging system. In fact, the problem was formalized by a linear program with the aim to assign each EV to an adequate charging station. The assignment takes into account various constraints and characteristics of EVs, as well as those of charging stations, traffic conditions, interest points of drivers, etc. The proposed approach allowed to assign adequately and optimally EVs to charging stations while satisfying all constraints
Hojas, Baenas Jovita Mercedes. "Cadeia de reciclagem das baterias veiculares : estudo da gestão de um fluxo logístico reverso para os pequenos fabricantes /". Bauru : [s.n.], 2008. http://hdl.handle.net/11449/90786.
Texto completo da fonteBanca: Rosane Aparecida Gomes Battistelle
Banca: Victor Eduardo Lima Ranieri
Resumo: A reciclagem de bateria além de ser prioridade para o meio ambiente é também lucrativa pelas inúmeras aplicações, como, por exemplo, a redução de gasto energia e a economia de matéria prima para novos produtos. A presente pesquisa buscou identificar a cadeia de reciclagem e análise dos fluxos reversos existentes nas indústrias de baterias veiculares. Empregou-se o método de pesquisa exploratória, buscando demonstrar os problemas relacionados ao sistema de gestão operacional e aos impactos ambientais gerado por esse sistema. Com isso, possibilitou descrever os fluxos logísticos reversos das indústrias montadoras e reformadoras, mostrando a problemática referente à reciclagem presente nas pequenas indústrias, devido à montagem da bateria ser semi-artesanal o que torna comprometedor à saúde do trabalhador e ao meio ambiente. Por meio dos resultados alcançados pode-se obter informações para desenvolver uma proposta de gestão de um fluxo logístico reverso, buscando melhorias contínuas para as indústrias de baterias de pequeno porte.
Abstract: Besides being a priority for the environment, battery recycling is also profitable due to its countless applications, such as in reducing energy costs and saving raw materials for new products. The goal of this dissertation is to identify and analyze the chain and logistic model reverse the industries of vehicular batteries from the center - west in São Paulo theoretical foundation on the organizational factors of micro and small enterprises, in production and process of manufacture of batteries, a supply chain management and on the proposed sustainability of these companies. The method of study used was an exploratory research, seeking to identify the problems related to environmental management system. Through research, it was possible to describe the reverse logistics models, of which the great issues relating to recycling is on small industries of batteries, the battery assembly due to be semi-craft, which compromises the worker's health and the environment. With the results, has a proposal to establish a model for reverse logistics industries, batteries, small size, with the purpose of the searh for improvements in organizational processes, because of the inadequacy with the management of the chain of recycling.
Mestre
Hojas, Baenas Jovita Mercedes [UNESP]. "Cadeia de reciclagem das baterias veiculares: estudo da gestão de um fluxo logístico reverso para os pequenos fabricantes". Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/90786.
Texto completo da fonteCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A reciclagem de bateria além de ser prioridade para o meio ambiente é também lucrativa pelas inúmeras aplicações, como, por exemplo, a redução de gasto energia e a economia de matéria prima para novos produtos. A presente pesquisa buscou identificar a cadeia de reciclagem e análise dos fluxos reversos existentes nas indústrias de baterias veiculares. Empregou-se o método de pesquisa exploratória, buscando demonstrar os problemas relacionados ao sistema de gestão operacional e aos impactos ambientais gerado por esse sistema. Com isso, possibilitou descrever os fluxos logísticos reversos das indústrias montadoras e reformadoras, mostrando a problemática referente à reciclagem presente nas pequenas indústrias, devido à montagem da bateria ser semi-artesanal o que torna comprometedor à saúde do trabalhador e ao meio ambiente. Por meio dos resultados alcançados pode-se obter informações para desenvolver uma proposta de gestão de um fluxo logístico reverso, buscando melhorias contínuas para as indústrias de baterias de pequeno porte.
Besides being a priority for the environment, battery recycling is also profitable due to its countless applications, such as in reducing energy costs and saving raw materials for new products. The goal of this dissertation is to identify and analyze the chain and logistic model reverse the industries of vehicular batteries from the center - west in São Paulo theoretical foundation on the organizational factors of micro and small enterprises, in production and process of manufacture of batteries, a supply chain management and on the proposed sustainability of these companies. The method of study used was an exploratory research, seeking to identify the problems related to environmental management system. Through research, it was possible to describe the reverse logistics models, of which the great issues relating to recycling is on small industries of batteries, the battery assembly due to be semi-craft, which compromises the worker's health and the environment. With the results, has a proposal to establish a model for reverse logistics industries, batteries, small size, with the purpose of the searh for improvements in organizational processes, because of the inadequacy with the management of the chain of recycling.
Zhou, Zhibin. "Modeling and power control of a marine current turbine system with energy storage devices". Thesis, Brest, 2014. http://www.theses.fr/2014BRES0094/document.
Texto completo da fonteThis PhD thesis models the whole power chain of a marine current turbine (MCT) system and investigates the use of energy storage devices to improve power quality and energy management capability. First, various energy storage technologies concerning their applications to address the power fluctuation phenomena in tidal current generation system are reviewed and compared. Then, a two-stage power smoothing control strategy for compensating swell-induced short-time fluctuations is proposed. The proposed control strategy uses a modified MPPT with filter strategy on the generator-side and supercapacitors on the grid-side for injecting a smoothed power to the grid. Afterwards, a flow battery system for daily energy management of a hybrid MCT/battery/diesel system is proposed. The MCT dominant power supply case and an island power supply (with diesel generators as the main source) are investigated. Finally, power limitation controls with a robust flux-weakening strategy for a PMSG-based non-pitchable MCT system are proposed for over-rated marine current speed periods. In this context, the constant power control and maximum power control modes at the flux-weakening stage are compared; and the influence of the generator parameters on the joint operating characteristics of the turbine and generator are also discussed
Solano, Javier. "Modélisation et supervision des flux énergétiques à bord d'un véhicule hybride lourd : approche par logique floue de type-2". Phd thesis, Université de Franche-Comté, 2012. http://tel.archives-ouvertes.fr/tel-00699896.
Texto completo da fonteAgbli, Kréhi Serge. "Modélisation multiphysique des flux énergétiques d'un couplage photovoltaïque-électrolyseur PEM-pile à combustible PEM en vue d'une application stationnaire". Phd thesis, Université de Franche-Comté, 2012. http://tel.archives-ouvertes.fr/tel-00767882.
Texto completo da fonteWilson, Brian Christopher David. "Control Designs for Low-Loss Active Magnetic Bearing: Theory and Implementation". Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04122004-133631/unrestricted/wilson%5Fbrian%5Fc%5F200405%5Fphd.pdf.
Texto completo da fonteHabetler, Thomas, Committee Member ; Sadegh Nader, Committee Member ; Taylor David, Committee Member ; Tsiotras Panagiotis, Committee Co-Chair ; Heck-Ferri Bonnie, Committee Co-Chair. Vita. Includes bibliographical references (leaves 319-326).
Філюк, Ярослав Олександрович. "Світлотехнічні установки з автономним живленням". Diss., Тернопільський національний технічний університет ім. Івана Пулюя, 2019. http://elartu.tntu.edu.ua/handle/lib/27944.
Texto completo da fonteФілюк Я.О. Світлотехнічні установки з автономним живленням – Кваліфікаційна наукова праця на правах рукопису. Дисертація на здобуття наукового ступеня кандидата технічних наук (доктора філософії) за спеціальністю 05.09.07 – «Світлотехніка та джерела світла». – Тернопільський національний технічний університет імені Івана Пулюя, Тернопіль, 2019. Робота присвячена дослідженню енергетичних характеристик сонячних елементів та акумулюючих систем, удосконаленню системи керування автономним живленням освітлювальних установок та впливу кліматичних умов на енергетичний потенціал сонячного випромінювання. Розроблено методику та змонтовано експериментальну установку для вимірювання фотоелектричних характеристик сонячних батарей. Запропонована модель сонячної батареї. Експериментально визначено параметри даної моделі. Проведено моделювання впливу фактора ідеальності діода і зворотнього струму насичення діода на напругу холостого ходу сонячної батареї. В якості акумулюючої системи для автономного джерела живлення освітлювальної установки запропоновано батарею із Li-ion акумуляторів та суперконденсаторів. Встановлено лінійну залежність ємності суперконденсатора від величини напруги зарядження. Експериментально визначено, що із збільшенням тривалості заряду суперконденсатора при номінальній напрузі збільшується час саморозряду. Запропоновано систему регулювання процесів заряду/розряду суперконденсаторів та Li-ion акумуляторів з використанням пристрою балансування напруги на окремих їх елементах. Запропоновано методику та змонтовано експериментальну установку для вимірювання та запису густини потоку сонячного випромінювання. Проведено аналіз впливу тривалості хмарності протягом кожного місяця 2016-2017 рр. на величину виміряних значень густини потоку сонячного випромінювання. Встановлено аналітичний зв’язок між середньодобовою поверхневою густиною енергії сонячного випромінювання та середньодобовим ступенем хмарності Есер=f(N). Проведено розрахунок енергетичного потенціалу сонячного випромінювання для м. Львова, м. Хмельницького, м. Івано-Франківського та м. Чернівці. Наведено методику та проведено розрахунку 2-х типів сонячних енергетичних установок для зовнішнього освітлення. Перший тип повністю забезпечує електроенергією зовнішнє освітлення в осінньо-зимовий період та другий тип у весняно-літній період. Виконано розрахунок автономного живлення зовнішнього освітлення 3-ох типів населених пунктів з різною кількістю населення: 2.8 млн (м. Київ), 218 тисяч (м. Тернопіль) та 8,7 тис (м. Ланівці)
Filiuk Ya.O. Lighting installations with autonomous power supply. The qualification scientific work on the manuscript copyright. Ph.D. thesis fin Engineering Sciences with major in 05.09.07 «Lighting engineering and light sources». Ternopil Ivan Pul’uj National Technical University, Ternopil, 2019. The work deals with the research of output performance of solar cells and accumulating systems, improvement of control systems for self-contained power supply of lighting installations and impact of climatic conditions on power potential of solar radiation. The methodology was developed and experimental installation was built for measuring photovoltaic performance of solar battery. Model of solar battery was proposed. Performance characteristics of this model were experimentally determined. Simulation of impact of diode ideality factor and diode reverse saturation current on idle solar battery voltage was carried out. Li-ion battery and supercondenser assembly was suggested as an accumulating system for self-contained power supply of lighting installation. Linear dependency of supercondenser capacity on the value of charging voltage was determined. It was experimentally stated that supercondenser self-discharge time increased when their charging duration at nominal voltage grew. Supercondenser and Li-ion battery charge/discharge regulation system using the device for voltage balancing on their separate elements was proposed. The methodology and experimental installation for measuring and recording of solar radiation flux density were proposed. The analysis of monthly cloud amount in the years of 2016-2017 and its influence on the content of observed values of solar radiation flux density was carried out. Theoretical relations between daily average surface solar radiation flux density and daily average cloud amount Есер=f(N) were established. Calculations of energy potential of solar radiation for the cities of Lviv, Khmelnytskyi, Ivano-Frankivsk and Chernivtsi were made. The dissertation provides descriptions of methodology and calculations made for two types of solar energy units for outdoor lighting. The first type completely supplies power for outdoor lighting during autumn-winter period whereas the second type – in spring-summer period. Calculations for outdoor lighting autonomous power supply of three types of cities with different population: 2.8M (Kyiv), 218K (Ternopil), 8,7K (Lanivtsi) were made.
ЗМІСТ ПЕРЕЛІК УМОВНИХ СКОРОЧЕНЬ 10 ВСТУП…………………………………………………………………………… 11 РОЗДІЛ 1. ЛІТЕРАТУРНИЙ ОГЛЯД 1.1. Стан зовнішнього освітлення населених пунктів України……. 17 1.2. Аналіз освітлювальних установок зовнішнього освітлення з автономним живленням………………………………………………......... 23 1.2.1. Джерела автономного живлення освітлювальної установки 1.2.2. Акумулюючі батареї для освітлювальних установок з автономним живленням ……………………………………………………….. 1.2.3. Контролери заряду акумуляторних батарей……………………. 29 33 40 Висновки …………….……………………………………………………… 43 РОЗДІЛ 2. ДЖЕРЕЛО АВТОНОМНОГО ЖИВЛЕННЯ ОУ НА БАЗІ СОНЯЧНИХ ЕЛЕМЕНТІВ 2.1. Вимірювання фотоелектричних характеристик сонячних елементів 44 2.2. Побудова моделі сонячної батареї…………………………………… 49 2.3. Блок накопичення електричної енергії……………………………… 53 2.4. Системи балансування напруги на окремих елементах акумулюючої системи……………………………………………………… 59 Висновки ……………..……………………………………………………… 61 РОЗДІЛ 3. ВИЗНАЧЕННЯ ЕНЕРГЕТИЧНОГО ПОТЕНЦІАЛУ СОНЯЧНОГО ВИПРОМІНЮВАННЯ 3.1. Вимірювання потоку сонячного випромінювання………………….. 63 3.2. Аналіз енергетичного потенціалу сонячного випромінювання з врахуванням кліматичних умов території……………………………….. 3.2.1. Результати дослідження густини потоку сонячного випромінювання на широті м. Тернополя……………………………………. 3.2.2. Вплив ступеня хмарності на густину енергії сонячного випромінювання……………………………………………………………….. 3.3. Використання результатів досліджень для моніторингу енергетичного потенціалу сонячного випромінювання населених пунктів Західного регіону України………………………………………. 66 66 74 85 Висновки ……………..…………………………………………………….. 88 РОЗДІЛ 4. МОДЕЛЮВАННЯ ОСВІТЛЮВАЛЬНОЇ УСТАНОВКИ З АВТОНОМНИМ ЖИВЛЕННЯМ ТА ЇЇ ТЕХНІКО-ЕКОНОМІЧНЕ ОБГРУНТУВАННЯ 4.1. Розрахунок сонячної енергетичної установки для зовнішнього освітлення населених пунктів……………………………………………… 89 4.2. Техніко-економічний розрахунок сонячної енергетичної установки для зовнішнього освітлення населених пунктів…………………………. 94 4.3. Світлотехнічний розрахунок ОУ …………………………………….. 100 4.4. Аналіз ефективності роботи автономної енергетичної установки для зовнішнього освітлення……………………………………………………. 102 Висновки ……………..……………………………………………………… 106 ВИСНОВКИ…………………………………………………………………….. 107 СПИСОК ВИКОРИСТАНОЇ ЛІТЕРАТУРИ ………………………………….. 109 Додаток А 121 Додаток Б 122 Додаток В 126 Додаток Г 134
Кожушко, Григорій Мифодійович. "СВІТЛОТЕХНІЧНІ УСТАНОВКИ З АВТОНОМНИМ ЖИВЛЕННЯМ". Diss., Тернопільський національний технічний університет ім. Івана Пулюя, 2019. http://elartu.tntu.edu.ua/handle/lib/27990.
Texto completo da fonteДобровольський, Юрій Георгійович. "СВІТЛОТЕХНІЧНІ УСТАНОВКИ З АВТОНОМНИМ ЖИВЛЕННЯМ". Diss., Тернопільський національний технічний університет ім. Івана Пулюя, 2019. http://elartu.tntu.edu.ua/handle/lib/27991.
Texto completo da fonteSolano, Martinez Javier Enrique. "Modélisation et supervision des flux énergétiques à bord d'un véhicule hybride lourd : approche par logique floue de type-2". Phd thesis, Université de Franche-Comté, 2012. http://tel.archives-ouvertes.fr/tel-00947626.
Texto completo da fonteFialho, Luís André Pereira. "Photovoltaic generation with energy storage integrated into the electric grid: modelling, simulation and experimentation". Doctoral thesis, Universidade de Évora, 2019. http://hdl.handle.net/10174/25361.
Texto completo da fonteFartaria, Tomás de Oliveira. "Advances in integration of photovoltaic power and energy production in practical systems". Doctoral thesis, Universidade de Évora, 2016. http://hdl.handle.net/10174/19773.
Texto completo da fonteHinderer, James Howard. "Radioisotopic Impurities in Promethium-147 Produced at the ORNL High Flux Isotope Reactor". 2010. http://trace.tennessee.edu/utk_gradthes/717.
Texto completo da fontePinheiro, Daniela Ribeiro. "Synthesis, photophysical and electrochemical studies on tryptanthrin and indigo derivatives. Historic molecules with modern applications". Doctoral thesis, 2021. http://hdl.handle.net/10316/95405.
Texto completo da fonteIndigo, an iconic molecule of colour, is included in the most ancient and important natural dyes used by mankind. The longevity as a colourant and unique properties of this compound are related with its high (photo)stability which is linked to a rapid proton transfer in the excited state (ESPT). In the past few years, indigo and its derivatives have gained renewed interest due to applications in several fields such as photoswitches, electronic devices and sensors. The study and development of an improved and fast approach for the synthesis of mono- and di-substituted indigo derivatives combined with a comprehensive characterization of their electronic spectral and photophysical properties in different solvents and temperatures was undertaken and constitutes the first part of this thesis. The study was further rationalized with density functional theory (DFT) and time-dependent density functional theory (TDDFT) calculations. The second part of this thesis reports the synthesis of tryptanthrin and tryptanthrin derivatives, important compounds with a variety of biological and pharmacological applications as well as redox properties. Tryptanthrin was synthesized from indigo under mild conditions using microwave irradiation. A comprehensive study of the excited state of these compounds was also undertaken. In contrast with indigo, emission of the triplet state of tryptanthrin and its derivatives, with the exception of 2-aminotryptanthrin, where fluorescence dominates, was observed with a very efficient singlet oxygen sensitization quantum yield. These results indicate intersystem crossing (ISC) to be the dominant deactivation channel in tryptanthrin and its derivatives, with high quantum yields. Time-resolved fluorescence and femtosecond transient absorption (fs-TA) data, further supported with TDDFT calculations, show for tryptanthrin, two species, a locally excited (LE) and a charge transfer (CT) with a highly reversible inter-conversion rate constant (LE to CT state). A pratical and modern application of storage of chemical energy with, an aqueous organometallic and an all-organic redox flow battery (RFB) with sulfonated tryptanthrin, working at neutral pH and with long-term stability, was further developed. The single cell tests showed reproducible charge-discharge cycles with significant improvement results for the aqueous all-organic RFB, with higth coulombic, voltaic and energetic efficiencies stabilized over several working cycles. The work paves the way to the promising development of new tryptanthrin based structures for environmentally friendly aqueous all-organic RFBs working at neutral pH values.
O índigo, uma icónica molécula da cor, é um dos corantes mais antigos e importantes usados pela humanidade. A longevidade deste corante assim como as suas propriedades únicas estão relacionadas com a sua elevada (foto)estabilidade que esta ligada a uma rápida transferência de protão no estado excitado. Nos últimos anos, o índigo e os seus derivados ganharam um interesse renovado devido a aplicações em diversos campos, tais como, interruptores fotónicos, dispositivos elétricos e sensores. O estudo e desenvolvimento de uma abordagem mais rápida e aprimorada da síntese de derivados mono- e di-substituídos do índigo combinados com uma caracterização abrangente das suas propriedades eletrónicas, espectrais e fotofísicas, em diferentes solventes e temperaturas foi realizada e constitui a primeira parte desta tese. O estudo foi racionalizado com cálculos teóricos através da teoria do funcional da densidade (DFT) e da teoria do funcional da densidade dependente do tempo (TDDFT). A segunda parte desta tese relata a síntese da triptantrina e seus derivados. Estes compostos são importantes pois para além de apresentarem uma vasta aplicação biológica e farmacológica possuem também propriedades de oxidação-redução. A triptantrina foi sintetizada a partir do índigo sob condições suaves utilizando radiação de micro-ondas como fonte de energia. Um estudo abrangente do estado excitado destes compostos foi também realizado. Em contraste com o índigo, na triptantrina e seus derivados, com exceção da 2-aminotriptantrina, onde a fluorescência domina, foi observada emissão do estado tripleto com rendimentos quânticos de formação de oxigénio singleto muito eficientes. Estes resultados indicam que a conversão intersistemas (ISC) é a principal via de desativação na triptantrina e seus derivados, com elevados rendimentos quântico. Os dados de fluorescência resolvida no tempo e absorção transiente de femtosegundos (fs-TA), complementados com cálculos TDDFT, mostram que no caso da triptantrina, existem duas espécies, uma excitada localmente (LE) e uma com transferência de carga (CT), com uma constante de interconversão altamente reversível (LE para o estado CT). Uma aplicação prática e moderna de armazenamento de energia química com, uma bateria redox de fluxo aquoso organometálico e exclusivamente orgânico com triptantrina sulfonada, trabalhando em pH neutro com estabilidade a longo prazo foi desenvolvida. Os testes de célula única demostraram ciclos de carga-descarga reprodutíveis, com melhores resultados no sistema exclusivamente orgânico, com eficiências coulômbica, voltaica e enérgicas estáveis e elevadas ao longo de vários ciclos. Este trabalho fornece uma nova perspetiva sobre o desenvolvimento de derivados da triptantrina solúveis em água com potencial aplicação em baterias de fluxo aquoso de sistemas exclusivamente orgânico que trabalham em pH neutro e são mais sustentáveis em termos ambientais.