Дисертації з теми "Propulsione navale"
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Iannaccone, Tommaso. "Analisi del comportamento di serbatoi di gas naturale liquefatto per applicazioni di propulsione navale in scenari di incendio." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Знайти повний текст джерелаAizza, Marco. "Modelli per la simulazione di azionamenti elettrici di propulsione e sistemi di generazione navali." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8532.
Повний текст джерелаLa propulsione elettrica navale è una soluzione che riscuote notevole interesse per le navi di nuova generazione. La sua versatilità permette di ottimizzare gli spazi ed i pesi del sistema elettrico di propulsione. Questo sistema garantisce una riduzione dei consumi specifici del motore primo che, al variare della velocità di rotazione dell’elica connessa alla macchina elettrica, lavora costantemente alla velocità nominale, dove i consumi sono ottimizzati. Il presente elaborato si pone come obiettivo lo studio di un sistema di propulsione ibrida, composto da una turbina a gas e due azionamenti elettrici, installato su navi militari di nuova concezione. Il sistema è in grado di funzionare anche come generatore asse. Lo studio si focalizzerà principalmente sugli azionamenti elettrici del sistema di propulsione e sulla loro interazione con il sistema elettrico integrato di bordo. L’obiettivo principale è quello di realizzare un simulatore dettagliato dell’azionamento elettrico di propulsione, permettendo di studiare il funzionamento dello stesso in regime stazionario e in regime dinamico. Viene quindi eseguita una modellizzazione matematica dettagliata dell’azionamento di propulsione oggetto di studio, dalla macchina elettrica ai convertitori di propulsione. Lo studio è condotto allo scopo di ottenere informazioni riguardanti il comportamento dell’azionamento, in determinate condizioni di funzionamento, e gli effetti da esso causati sulla rete elettrica di bordo. Viene poi descritto il modello del sistema funzionante in modalità di “generatore asse”, dalla trattazione fatta sul sistema di propulsione, effettuando una validazione del relativo simulatore implementato, attraverso la comparazione tra i risultati ottenuti e le prove di collaudo fornite dai produttori del sistema oggetto di studio. Viene infine trattato uno degli argomenti più promettenti nell’ambito della propulsione elettrica navale, il sistema di distribuzione in media tensione continua (MVDC). Il sistema MVDC è una soluzione che riscuote notevole interesse nell’ambito delle “all-electric ship” di nuova generazione, grazie ai vantaggi offerti in termini di riduzione di pesi e dimensioni del sistema di generazione e di consumo di energia.
XXV Ciclo
1981
BONO, ANDREA. "Criticità nelle esigenze e nelle offerte energetiche: il ruolo rilevante della progettazione e della gestione ottimizzata delle macchine a fluido e dei sistemi per la conversione di energia. Aspetti applicativi nella piccola fornitura di energia e nella propulsione navale." Doctoral thesis, Università degli studi di Genova, 2021. http://hdl.handle.net/11567/1046981.
Повний текст джерелаConvert, Damien. "Propulsion magnétohydrodynamique en eau de mer." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10002.
Повний текст джерелаPapale, Davide. "High performance waterjets: study of an innovative scoop inlet and development of a novel method to design ducted propellers." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424758.
Повний текст джерелаIl documento riassume il progetto di dottorato sugli idrogetti ad alte prestazioni condotto dall'autore nel periodo che va dal 2012 al 2014. Durante il triennio sono stati affrontati due filoni principali di ricerca riguardo questi propulsori, focalizzandosi in particolare sullo studio dell'imbocco e del sistema pompante. Un idrogetto è una propulsore navale che riesce a produrre una forza propulsiva accelerando una massa d'acqua; durante questo processo la massa d'acqua, originariamente presente libera nell'ambiente marino o fluviale, attraversa quattro diversi componenti: l'imbocco, il sistema pompante, l'ugello e il sistema sterzante. Ogni componente possiede una sua funzionalità ma in generale massimizzando l'efficienza di questi componenti è possibile osservare un generico aumento delle prestazioni complessive. Il lavoro qui presentato si è focalizzato sullo studio dell'imbocco e del sistema pompante; volendo essere di carattere innovativo, le configurazioni e le idee qui presentate rappresentano delle alternative costruttive o metodologiche sostanzialmente differenti dalla comune prassi industriale. Lo studio dell'imbocco ha avuto come linea guida il confronto tra un imbocco commerciale di stampo tradizionale (i cosiddetti imbocchi flush) e un imbocco dinamico di derivazione aeronautica (imbocchi scoop). Lo studio, oltre a rappresentare forse l'unico caso in letteratura di studio specifico su imbocchi dinamici, mette in luce le criticità dell'imbocco tradizionale mostrando una via alternativa alla prassi industriale. Lo studio analizza le performance in termini di perdite di pressione totali e fattore di distorsione di questi due imbocchi, con e senza la presenza dell'albero di trasmissione, attraverso diverse analisi CFD. Interessante è la derivazione aeronautica dell'imbocco dinamico preso “in prestito” da studi NASA riguardanti un imbocco per un aereo sperimentale caratterizzato da importanti spessori dello strato limite. Lo studio dimostrerà, per il caso in analisi, la superiorità dell'imbocco dinamico rispetto a quello tradizionale nei termini di paragone sopra descritti, dimostrando la necessità di affrontare con critico approfondimento lo studio degli imbocchi sugli idrogetti in ambito industriale, rimettendo in discussione molti dogmi dati per scontati nella realtà industriale ma in verità mai dimostrati nella letteratura scientifica. Lo studio dell'apparato pompante è stato affrontato in due fasi, la prima squisitamente teorica , la seconda di carattere sperimentale. La fase teorica ha visto la definizione di un nuovo metodo per la progettazione di un apparato pompante assiale. Il metodo, che è stato successivamente implementato in un programma Matlab e validato, è un metodo di carattere generale frutto della combinazione di diversi metodi analitici già utilizzati in letteratura ma in maniera concettualmente differente; anche se sviluppato originariamente per una pompa di un idrogetto, è stato pensato per avere una validità generale e può essere utilizzato per lo studio di una qualsiasi pompa assiale intubata. Il metodo rappresenta una combinazione di un metodo BEM (Blade Element Momentum) con due teorie analitiche per il calcolo dei coefficienti di portanza e resistenza dei profili alari (Weinig e Lieblein) e dell'equazione di Eulero per le turbomacchine. Il metodo risultante è un metodo fortemente iterativo che permette di calcolare la geometria di una pompa assiale intubata e le sue prestazioni anche fuori dal punto di progetto senza la necessità di utilizzare fattori empirici di discutibile attendibilità; esso si dimostra quindi un metodo innovativo e flessibile per lo studio completo di un generico propulsore intubato. Il metodo è stato implementato e testato sia numericamente che sperimentalmente grazie alla collaborazione della “University of Southampton” e della ditta “TSL Technology” su un propulsore elettrico attuato in periferia. Il propulsore in questione fa parte di una classe di propulsori di nuova concezione meglio conosciuti come RDP (Rim Driven Propeller) che fra le varie caratteristiche hanno quella di abbandonare la necessità di un albero per la trasmissione della coppia motrice con la conseguente assenza delle perdite dovute alla presenza dell'albero immerso nel flusso dell'acqua. La realizzazione sperimentale di questo propulsore, oltre ad aver sensibilmente migliorato l'efficienza del propulsore rispetto a quelli sviluppati in passato dalla ditta coinvolta, ha dimostrato l'attendibilità del modello analitico sviluppato.
Froidurot, Benoît. "Discrétion magnétique des machines électriques de propulsion navale." Grenoble INPG, 2002. http://www.theses.fr/2002INPG0074.
Повний текст джерелаDadd, George M. "Kite dynamics for ship propulsion." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/351348/.
Повний текст джерелаDebbou, Mustapha. "Modélisation et commande d'un système innovant pour la propulsion navale." Thesis, Toulouse, INPT, 2014. http://www.theses.fr/2014INPT0028.
Повний текст джерелаThis study focuses on the benefits that can be induced by the use of the Double Fed Induction Machine (DFIM) operating in motor mode for marine propulsion systems. It can be achieved by the additional degree of freedom it provides, firstly, by exploiting the natural structural redundancy, and secondly, by the alytical redundancy introduced by applied control strategies. The first part of this thesis presents the modeling of a propeller architected mainly around the DFIM and its load such as a propeller with three fixed and symmetrical blades. Several control strategies have been introduced to control the system, in fact, linear and nonlinear control laws type associated with various modulators have been validated and applied to the propulsion structure. The objective was to evaluate the influence of these techniques for two major design criteria, namely, losses in power converters, and noise and vibration noise. Naval propulsion as any embedded system has requirements for the quality of service not only in performance but also reliability and availability. Indeed, the systems designed for these types of applications must ensure and guarantee continuity of service in response to the failures in system components. The use of MADA in propulsion systems provides a natural structural and analytical redundancies which ensure system service continuity in the presence of a fault in this structure. Two faults are considered in this study, a power semiconductor fault in the power converter and a speed sensor / position failure. Control strategies proposed, the propeller modeling established and reconfigurations adopted following settings have been validated by simulation and experimentally on the real laboratory or industrial benches developed in the context of this study
Waller, Brian S. "Development of a Quantitative Methodology to Forecast Naval Warship Propulsion Architectures." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/2000.
Повний текст джерелаMan, S. "Aquatic flight inspired propulsion for autonomous underwater vehicles." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/385840/.
Повний текст джерелаGuibert, Cédric. "MODELISATION ET COMMANDE EN POUSSEE DE MOTEURS A COURANTS ALTERNATIFS EN PROPULSION NAVALE." Phd thesis, Université de Nantes, 2005. http://tel.archives-ouvertes.fr/tel-00128368.
Повний текст джерелаLa première partie de ce mémoire présente la modélisation des propulseurs ainsi que plusieurs commandes en poussée issues de la littérature. La majorité de ces commandes est basée sur l'inversion des modèles avec parfois une boucle de régulation
intermédiaire.
Dans une deuxième partie, une commande originale est proposée. Elle repose sur trois éléments : l'observation du couple hydrodynamique, l'estimation de la poussée par modèle inverse et l'utilisation de correcteurs de type PID. Une étude comparative avec les commandes existantes est menée en simulation.
Enfin, la dernière partie concerne la conception d'un banc d'essais. Ce banc d'essais permettra de valider les modèles et les lois de commande utilisés pour la commande en poussée des AUV et des ROV.
Guibert, Cédric. "Modélisation et commande en poussée de moteurs à courants alternatifs en propulsion navale." Nantes, 2005. http://www.theses.fr/2005NANT2137.
Повний текст джерелаThis work deals with the thrust control for marine electric thrusters. In order to simplify the problem, we consider the case of the thrusters which equip the Autonomous Underwater Vehicles (AUV) or Remotely Operated underwater Vehicles (ROV). The first part of this work presents the thruster modelling and several thrust controls find in the literature. The most of these controls are based on the inverse models, sometimes with a cascade regulation loop. In a second part an original control law is proposed. This one is based on three parts~: the observation of the hydrodynamic torque, the thrust estimation by the inverse model and the use of PID controllers. A comparative study with the existing control laws is undertaking in simulation. Finally, the last part relates to the design of a thruster test stand. This test will allow to validate the models and the control laws used for the thrust control of AUV and ROV
Schmerber, Louis-Antoine. "Identification et caractérisation de sources électromagnétiques : application à la discrétion des moteurs de propulsion navale." Grenoble INPG, 2006. https://tel.archives-ouvertes.fr/tel-00128151v2.
Повний текст джерелаThis Ph. D. Thesis presents two methods : one to identify dynamic electromagnetic sources and another one to size an efficient magnetic shield. Both are based on harmonic expansion solutions of Maxwell's equations. The electromagnetic identification gives from near electromagnetic fields measurements the main characteristics of a dynamic source closed in a conducting media. Electromagnetic field extrapolation of the source and condition monitoring based on near field measurements are the applications of the identification method. It uses Bayesian estimation of the harmonic expansion parameters of a source. It allows the use of prior information. The magnetic shielding method is based on the harmonic expansion of boundary conditions and the distinction between the attenuation effect and the shape effect of the shield on the parameters of an electromagnetic source
Trophime, Christophe. "Modélisation numérique du couplage magnétohydrodynamique (MHD) fort : application à la propulsion MHD navale." Grenoble INPG, 1995. https://hal.archives-ouvertes.fr/tel-01340645.
Повний текст джерелаWe present a 3D numerical simulation code for MHD phenomena. The electromagnetic problem is treated by the finite element method. Navier-Stokes equations for incompressible fluid in steady state are solved using the Finite Volumes method. The coupling of these two methods is performed by interpolation procedures for calculating the Laplace forces and the velocity field. The code is applied to different MHD problems. These examples validate and highlight coupling MHD situations, processed by our program. Finally the modeling of naval MHD propulsion is discussed. It relates to both systems conduction and induction. Particular attention is paid to the coupling between flow and electromagnetic forces in both cases
Thomas, Mark W. "Evaluation and optimization of axial air gap propulsion motors for naval vessels." Thesis, Monterey, California. Naval Postgraduate School, 1996. http://hdl.handle.net/10945/8347.
Повний текст джерелаThomas, Mark W. (Mark Wayne). "Evaluation and optimization of axial air gap propulsion motors for naval vessels." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38167.
Повний текст джерелаIncludes bibliographical references (leaves 89-90).
by Mark W. Thomas.
M.S.
Nav.E.
Sarris, Emmanouil. "Naval ship propulsion and electric power systems selection for optimal fuel consumption." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68573.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. [100]-102).
Although propulsion and electric power systems selection is an important part of naval ship design, respective decisions often have to be made without detailed ship knowledge (resistance, propulsors, etc.). Propulsion and electric power systems have always had to satisfy speed and ship-service power requirements. Nowadays, increasing fuel costs are moving such decisions towards more fuel-efficient solutions. Unlike commercial ships, naval ships operate in a variety of speeds and electric loads, making fuel consumption optimization challenging. This thesis develops a flexible decision support tool in Matlab® environment, which identifies the propulsion and ship-service power generation systems configuration that minimizes fuel consumption for any ship based on its operating profile. Mechanical-driven propulsion systems with or without propulsion derived ship-service power generation, separate ship-service systems and integrated power systems are analyzed. Modeling includes hull resistance using the Holtrop-Mennen method requiring only basic hull geometry information, propeller efficiencies using the Wageningen B series and transmission and prime movers fuel efficiencies. Propulsion and ship-service power generation systems configuration is optimized using the genetic algorithm. US Navy's Advanced Surface Ship Evaluation Tool (ASSET) model for the DDG-51 Flight I destroyer was used for modeling validation. Optimal fuel consumption results are compared against the existing configuration for the DDG-51 Flight I destroyer using a representative operating profile.
by Emmanouil Sarris.
S.M.in Engineering and Management
Nav.E.
Boissonneau, Patrick. "Propulsion MHD en eau de mer : étude des couplages hydrodynamique-électrochimie-électromagnétisme." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10079.
Повний текст джерелаSigrist, Jean-François. "Modélisation et simulation numérique d'un problème couplé fluide/structure non linéaire : application au dimensionnement de structures nucléaires de propulsion navale." Nantes, 2004. http://www.theses.fr/2004NANT2088.
Повний текст джерелаUhlig, Robert Angus. "Preliminary design and integration procedures for gas turbine intercoolers on naval combatants." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/80076.
Повний текст джерелаMaster of Science
Palmer, Alistair Robin. "Analysis of the propulsion and manoeuvring characteristics of survey-style AUVs and the development of a multi-purpose AUV." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/72149/.
Повний текст джерелаODETTI, ANGELO. "Study of innovative autonomous marine vehicles for monitoring in remote areas and shallow waters The Shallow Water Autonomous Multipurpose Platform (SWAMP)." Doctoral thesis, Università degli studi di Genova, 2020. http://hdl.handle.net/11567/1003967.
Повний текст джерелаBourguet, Salvy. "Contribution à l'étude de l'influence du réseau de distribution d'un navire tout électrique sur sa signature électromagnétique." Nantes, 2004. http://www.theses.fr/2004NANT2104.
Повний текст джерелаElectrical installations aboard passenger and goods vessels keep developing with a more and more frequent use of electric propulsion and the massive introduction of power converters. As far as military ships are concerned the increase of the aboard electrical power must not compromise its 'discretion', especially due to an uncontrolled electromagnetic signature. In enhancing the circulation of currents as well as the presence of voltage in a low frequency range within the distribution network, this study mainly focuses on propulsion systems and aims at finding the sources of such perturbations. A commutation functions based analysis allows to reveal low frequency perturbations in the different parts of the propulsion system. Two kinds of converters are dealt with: current source inverters and voltage source inverters. Both of these drives generate network and propulsion motor driving frequency dependent interharmonic perturbations. These ones are foreseeable according to the kind of converter and to propulsion structure (coupling of the transformers, propulsion motors stator windings). Some measures recorded aboard several all electric ships equipped with this kind of propulsion converters validate this approach. Numeric simulation is used and developed in order to have a tool to predict the perturbations within the propulsion systems and the distribution networks of the electrical ships. Subsequently, in an experimental approach, this work puts forward a description of the different leakage currents coming from several installations. The measure of the electromagnetic signature transmitted by an all electric cruise hip is presented and analysed, showing the influence of the frequencies of the electrical sources onboard
Llinares, Sylviane. "Marine, propulsion et technique : l'evolution du systeme technologique du navire de guerre francais au xviiie siecle." Paris 4, 1993. http://www.theses.fr/1993PA040111.
Повний текст джерелаThe propulsive system is the main weakness of french shipwar during the eighteenth century. This vulnerable point of rigging (including masting, ropes, blocks and sails) to the vessels and frigates is original, regular and will lasting up the end of the studied period (1660-1789). Generaly, the progress of science and theory esteemed essential to improve the shipbuilding (but tu stay incomplete) and the excessive political "standardization" to be continued by the naval administration are oriented the evolution of shipwar in french. By opposition, the english navy is more inventive for the rigging and she profit's by many innovations tested and prouved on there ships who give it to them a great technological superiority in europe
VIGNA, VERONICA. "Modelling energy efficiency of complex ship propulsion systems, considering sludge recycling, exhaust gas recovery and Flettner rotors." Doctoral thesis, Università degli studi di Genova, 2022. http://hdl.handle.net/11567/1093175.
Повний текст джерелаLanfranchi, Jacques. "Études des résonances d'objets à symétrie cyclique : modes propres d'une hélice de navire." Le Havre, 1998. http://www.theses.fr/1998LEHA0015.
Повний текст джерелаGaudart, Louis. "Incidences des configurations de fonctionnement de navires militaires sur la suralimentation a deux etages de leurs moteurs diesel de propulsion pag btc." Nantes, 1987. http://www.theses.fr/1987NANT2061.
Повний текст джерелаTauzia, Xavier. "Simulation de l'influence des parametres de fonctionnement des moteurs diesel suralimentes semi-rapides sur les emissions polluantes etude en regime stationnaire et dynamique application aux ensembles utilises en propulsion navale." Nantes, 1998. http://www.theses.fr/1998NANT2063.
Повний текст джерелаLUZZI, MATTEO. "Small scale Cogenerative Energy Systems with low Environmental impact for Naval applications." Doctoral thesis, Università degli studi di Genova, 2022. http://hdl.handle.net/11567/1082823.
Повний текст джерелаBehrel, Morgan. "Investigation of kites for auxiliary ship propulsion : experimental set-up, trials, data analysis and kite specs novel identification approach." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0132.
Повний текст джерелаThis study is part of the research program beyond the sea® aiming to develop kites as auxiliary propulsion devices for ships. The goal is to use the energy of the wind to save fuel and reduce harmful emissions. Such a project needs numerous developments and scientific actions, particularly to model the behavior of giant kites and associated ships. However these models must be compared to measurements to assess their validity. This study is then focus on the measurements of the interaction between kites and ships, at a limited scale in comparison to the real scope of the project. Thus measurement campaigns were carried out on a 13-meter long trawler, and on a 6-meter long experimental platform specifically designed. Another experimental campaign was also carried out onshore to assess the aerodynamic specs of the kite. Each of these three campaigns was based on a complex experimental set-up, including an automatic kite control system. In addition to provide a valuable data set for further scientific analyses, this study provided also tools which can be used by the industrial partners of the beyond the sea project®
Rolland, Yves. "Le transport de marchandises sur le Rhône et la Saône à l’époque romaine (Ier s. av. – IVe s. ap. J.-C.) : paramètres, conditions et possibilités de la navigation." Thesis, Lyon 2, 2014. http://www.theses.fr/2014LYO20132.
Повний текст джерелаThe Rhone River, in conjunction with its tributary the Saone River, form an axis of penetration inside the Gaul used during the Roman period to link the Mediterranean sea to the north of the empire. Short land connections enabled the trades to flourish over the basins of the Loire, the Seine, the Rhine and the alpine lakes. Short land connections have allowed the pursuit of the trades over the basins of the Loire, the Seine, the Rhine and the alpine lakes. Only the southwest quarter seems to have escaped the influence of the Rhone. This corridor formed the major artery of the Gallic river network, even before the Roman conquest. The waterway at the time was the primary means for transporting goods inland, up until the arrival of the railway. The Rhône and Saone rivers alone would have conveyed nearly half of river traffic of all Gaul. These waterways have also clearly contributed to the development of riverside towns often corresponding to river stops and points of cargo redistribution. The interest of the subject is of paramount importance. The intention of this work is threefold. First, provide an overview of the navigation of the Rhone and the Saone as evidenced by series of discoveries of the 2000s (Lyon and Arles wrecks) ; then disprove two commonly held misconceptions of the Roman "landlubber": the use of archaic navigation technique and the ease of the river environment. Finally, the main intention is to show the specifics of navigation on the Rhone and Saone in Roman times. This will be covered in three parts. A first part related to the navigation parameters (goods, packaging, crafts, corporations, river environment) to identify in detail the characteristics and issues related to each of them. A second part is dedicated to given navigation conditions : weather, boat morphology (draft, air-draft), dynamic conditions (possible propulsions), legal and religious conditions, risk of attack, etc. Based on the navigation parameters and navigation conditions presented, the last part describes the possibilities of navigation that were offered at that period. It is a tool to simulate transport situations. The reader has the option to "compose" a transport scenario by selecting the parameters of the first part, and by confronting them to the navigation conditions of the fluvial axis defined in the second part. In the end, it is possible to to give answers to several questions such as the use of oar or sail against the current, the possible drafts that could be used, the presence of marine ships or dolia ships upstream of Arles, the most favorable conditions to barge navigation, the speed or travel time
MIGNOTTE, DOMINIQUE. "Etude et evaluation de l'alteration des moteurs diesel suralimentes. Elaboration d'une procedure de diagnostic. Application aux moteurs de forte puissance a suralimentation monoetagee et bietagee, dans le cadre de la maintenance predictive et corrective de la propulsion navale militaire." Nantes, 1994. http://www.theses.fr/1994NANT2113.
Повний текст джерелаLarsson, Arvid. "Ecolometer - An environmental sales tool." Thesis, KTH, Marina system, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-286804.
Повний текст джерелаMiljöfrågor ligger ofta i fokus i dagens debatt, och att tänka miljövänligt och hållbart blir allt mer ett socialt krav. Vår planet förändras, och vi människor måste göra stora förändringar i hur vi lever för att undvika att potentiella katastrofer uppstår. Nya lagar, regler och hållbarhetsmål är konstant uppsatta runt om i världen för hur vi ska leva. Inom den maritima industrin sattes nyligen stora mål upp i hur mycket utsläpp som tillåts för fartyg runt vilket sätter stor press på företag inom branschen runt om i världen. Denna uppsats introducerar ett nytt försäljningsverktyg, Ecolometern, vars syfte är att hjälpa och assistera Volvo Pentas säljprocesser. Verktyget använder sig av en Product Environmental Footprint metodologi för att kvantifiera miljöpåverkan utifrån olika kategorier i Nine Planetary Boundaries modellen. Baserat på modellen, har ett antal kategorier valts ut, som agerar kriterier för det nya verktyget. Verktyget har även blivit validerat och testa mot ett antal case, där olika drivlinor har blivit analyserade. Resultatet visar att metoden och verktyget är användbart för det uppsatta syftet. Verktyget ger ett effektivt men enkelt sätt att visa och optimera miljöpåverkan sett till hela livscykeln av ett fartyg, samtidigt som det gör hållbarhetstänk mer tillgängligt och populärt inom industrin. Uppsatsen visar också på nödvändigheten för Volvo Penta att implementera detta verktyg, för att försäkra sig om att deras hållbarhetssatsningar verkligen går åt rätt håll.
Cadalen, Baptiste. "Modélisation et commande robuste d'une aile de kite en vol dynamique : application à la traction d'un navire." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0136.
Повний текст джерелаThe need in reducing the CO_2 emissions and the increase of oil prices affect all transportation industries and especially the maritime industry. This has led to the search for more energy-saving ship propulsion systems. Taking advantage of wind energy by using tethered wings, or kites, as an alternative propulsion source can be an effective solution. The "beyond the sea" project, led by Yves Parlier, aims to provide ships an alternative green energy source. In most wind conditions, compared to a static flight, a dynamic motion of a tethered wing with an eight-shaped pattern can provide sufficient force through traction to tow a ship. Therefore, the main objective of this study is the modeling and robust control of a tethered kite in dynamic flight. To this end, a point mass model is first used to describe the kite dynamics. The model parameters are estimated from experimental data and the aerodynamic coefficients are identified using data from a quasi-static flight. Open loop simulations are conducted to verify the kite behavior and the overall coherence of the model. To ensure a dynamic flight, an eight-shaped trajectory is defined within the wind window. Its position, size, orientation and direction are all adjustable parameters. A path-following strategy is then developed in order to design a robust control law including the kite model. This allows the system to be used in different trajectories with a wide range of wind speeds. Closed-loop simulations are presented to show the efficiency of the path-following algorithm, and the various theoretical performances obtained shows the efficiency of a kite dedicated to vessels auxiliary propulsion
Filho, Gilberto Dória do Valle. "Avaliação das instalações de máquinas em navios visando redução do uso de combustível fóssil." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3135/tde-11082011-131221/.
Повний текст джерелаThis work addresses the issue of reduction of fossil fuel use on ship machinery. Presently it is an interesting topic due to high operational cost and the pollution emissions generated by the combustion process. Initially, it is introduced the present scenario and future trends regarding conventional ship machinery that use heavy or diesel fuel oil. In the sequence, the proposed alternatives for reducing the use of fossil fuel on ships are presented and examined. These alternatives are classified into three categories. The first category comprises possible improvements to the design of ships for reduction of total energy demand. The other categories refer to the use of alternative energy sources, that produce and additional force on the ship reducing the required propeller thrust; or a supplementary power added to the propulsion shaft. For both cases there is also a reduction in the power required from the Diesel engine. Afterwards, the pertaining thermodynamics theory is revised and discussed with focus on the energy and exergy analysis as aid tools for evaluation of ship machinery. The energetic analysis, different from the sole energetic focus, is the most applicable tool to be employed for environmental issues as the self definition of exergy relates to an environment reference. Finally, using data from a typical container ship belonging to the national fleet, an application example using the thermodynamic analysis is performed to the propulsion main engine; as well as it is also simulated several alternative conditions for improvements and new energy sources, aiming to the reduction of fossil fuel consumption.
Froidurot, Benoît. "DISCRETION MAGNETIQUE DES MACHINES ELECTRIQUES DE PROPULSION NAVALE." Phd thesis, 2002. http://tel.archives-ouvertes.fr/tel-00473509.
Повний текст джерелаYANG, LI-WEI, and 楊立瑋. "Naval Propulsion Shafting Design And Case Studies." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/9x6hm3.
Повний текст джерела國立高雄應用科技大學
模具系碩士在職專班
104
This study concentrates on propulsion shafting design and parameters study for MIL-STD-2189 that is a document of design methods for naval shafting. The thesis gets relevant data results and performs case research analysis along with verification for naval propulsion shafting design. Bearing stress and shafting load are designed in the safety range to prevent the shaft and propeller with unnecessary vibration. The study provides reference data for future naval ship propulsion system design and configuration modification. The results for both submarines and surface ships shafting are validated by case studies and proven feasible after the validation. It should be noted that in addition to obtaining the required relevant parameters, boat and environmental conditions in paragraph should be the same as that of the document providing, otherwise the expression will not be validated.
Schmerber, Louis. "Identification et caractérisation de sources électromagnétiques - Application à la discrétion des moteurs de propulsion navale." Phd thesis, 2006. http://tel.archives-ouvertes.fr/tel-00128151.
Повний текст джерелаGully, Benjamin Houston. "Hybrid powertrain performance analysis for naval and commercial ocean-going vessels." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-08-6270.
Повний текст джерелаtext