Literatura académica sobre el tema "Marine diesel motors"
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Artículos de revistas sobre el tema "Marine diesel motors"
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Bayraktar, Murat y Mustafa Nuran. "An assessment of electric motors from the point of marine propulsion systems". World Journal of Environmental Research 12, n.º 1 (31 de mayo de 2022): 43–49. http://dx.doi.org/10.18844/wjer.v12i1.7733.
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The global environmental concern and the limited resources of fossil fuels warrant the use of alternative and renewable energy sources. The International Maritime Organisation aims to increase energy efficiency and reduce emissions from marine vessels. In this context, in addition to the conventional propulsion system, the application of hybrid propulsion system (HPS) and diesel-electric propulsion system (DEPS) comes to the fore. This study aims to analyse electric motors, one of the HPS and DEPS equipment, in detail. In this study, HPS gains are described by performing application load tests on electric motors and diesel engines in detail. Consequently, this article found that HPS and DEPS systems will be used more widely in the maritime industry in the future, especially on tugboats operated at low loads for most of their operating time. This paper will be a prominent source for researchers and maritime sector stakeholders whose studies are concerning HPS and DEPS, particularly on electric motors.
Keywords: Efficiency, energy, electric motor, marine vessels, propulsion, system;
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Sagin, Sergey Viktorovich y Oleksandr Vladymyrovich Semenov. "Motor Oil Viscosity Stratification in Friction Units of Marine Diesel Motors". American Journal of Applied Sciences 13, n.º 2 (1 de febrero de 2016): 200–208. http://dx.doi.org/10.3844/ajassp.2016.200.208.
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Maya Kerimova, Sakina Abbasova, Maya Kerimova, Sakina Abbasova. "IMPROVEMENT OF INTELLIGENT INTERNAL COMBUSTION ENGINES". PIRETC-Proceeding of The International Research Education & Training Centre 27, n.º 06 (25 de agosto de 2023): 65–72. http://dx.doi.org/10.36962/piretc27062023-65.
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Research investigations of the solutions of internal combustion engine control problems based on artificial intelligence systems are quite relevant. The power of ship devices and mechanisms is increasing, the requirements for accuracy, reliability, speed and other indicators of the quality of control processes are increasing, increased operational requirements related to economy and efficiency of ship systems and equipment. Currently, there are a lot of studies which are successfully performed to create the installations with a higher degree of automation – adaptive (intelligent) internal combustion engines, including a class of marine diesel installations. This term means the Engine controlled by adaptive automatic control systems with elements of artificial intelligence that can apprehend and analyses quite complicated and changeable ambient and take a decision. However, the problematic issues of adapting a piston engine in operating conditions are still under study and theoretical conceptualization. In this article, a study of the scientific and technical problem of improving the operational qualities of intelligent marine diesel installations is carried out. The problem has a great technical importance and requires scientific substantiation of the directions of both improving the operational qualities and reliability of existing models, and identifying ways to modernize existing structures of marine diesel installations. Кeywords: internal combustion engines, marine diesel, intelligent engine, adaptive systems, adaptive motors, microprocessor controls, controlling algorithm, neural networks.
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Savenko, A. E. y P. S. Savenko. "Improving the operational characteristics of electrical power systems of marine vessels". Power engineering: research, equipment, technology 25, n.º 6 (12 de enero de 2024): 78–88. http://dx.doi.org/10.30724/1998-9903-2023-25-6-78-88.
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THE PURPOSE. Consider the experience of use and conduct a study of the electrical power systems of sea vessels to determine the possibility of improving their operational characteristics. Obtain data on noise and vibration levels of electrical power systems elements.METHODS. The article analyzes the electrical power systems of the Azipod type steering columns of the Baltika icebreaker. The issue of regulating the rotation speed of propulsion electric motors using frequency control based on a DC link and parallel-connected inverter units on IGBT transistors is considered. Motor control on the frequency converter side can be based on direct torque control, scalar and vector control. There are control modes for reducing and increasing voltage.RESULTS. Typical dependences of structure-borne noise levels of main engines and generators are given. Measurements were taken at various frequencies of engine sound power levels, exhaust gases and vibration of generator sets. Experimental oscillograms of studies of the parallel operation of diesel generator sets were obtained, on which power exchange and common-mode oscillations were recorded.CONCLUSION. It is proposed to use multiphase AC electric motors to improve performance characteristics, including reducing noise and vibration. The existing experience in using frequency converters based on a rectifier section and inverter units in electric rowing installations with Azipod propellers makes it possible to implement such a change. To do this, it is necessary to parallelize the inverters that supply each of the three phases and provide the appropriate phase shifts.
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Zelinsky, Michail Mikhailovich, Nickolay Gennadievich Romanenko y Egor Aleksandrovich Nenastiev. "Modeling load effect of marine diesel engines on cooling system operation". Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2022, n.º 4 (30 de noviembre de 2022): 89–96. http://dx.doi.org/10.24143/2073-1574-2022-4-89-96.
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The article provides analysis of the load effect of the marine internal combustion engines (ICE) on the tem-perature parameters of the water cooling system of ICEs equipped with L32-40 Vis diesel engines. In ICE cooling systems the drive motors of the pumps supplying the cooling water operate at a constant speed and provide a constant water supply. The thermal state of a marine diesel ICE is regulated by valves according to deviation of the actual temperature values of cooling water from the preset values. By closing or opening the water lines the valves change the proportion of cooling water flows of the external and internal circuits fed to the heat exchangers. There is implemented the principle of regulating the deviation of the main coordinate - the temperature of the cooling water. The influence of other factors on the operation of the system is taken into account with a delay. Modeling the operation of the high-temperature circuit of the cooling system of the main ship engine of the ferry was carried out using the simulator
of the engine room TRANSAS TechSim 5000. There have been obtained graphical results of changing the cooling circuit water temperature with increased and decreased loads on diesel engines by changing the set speed with different initial and final values at a constant water temperature in the external cooling circuit. The graphs helped obtain numerical and qualitative indicators of transient processes (duration, oscillation, overshoot, final temperature values, etc.) for the different initial conditions - ranges of diesel load changes. The resulting graphical dependences are analyzed, conclusions about the modes of working out the disturbing influences by the cooling system, the parameters
of transient processes and the features of the operation of the standard control system and the cooling system circuit
of the main marine diesel engine in terms of ensuring optimal performance of the system are drawn. It has been inferred that the standard control system under some initial conditions does not provide the optimal parameters of transient processes.
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Faіtar, Catalіn, Liviu-Constantin Stan y Nicolae Buzbuchi. "Performance and reliability of exhaust gas recovery units for marine engines". Technium: Romanian Journal of Applied Sciences and Technology 4, n.º 8 (25 de agosto de 2022): 23–32. http://dx.doi.org/10.47577/technium.v4i8.7262.
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Although the marine diesel engine market is dominated by slow-coupled two-stroke engines with a direct coupling system and a crossover system or four-stroke engines with medium or high speeds, equipped with a reversing system, there is a hybrid variant that has always been used by the market in Japan and East Asia, especially by coastal or fishing operators. These are four-stroke slow engines. These types of engines are a specialty specific to the Japanese profile industry, being characterized by a simple and robust construction and fairly long piston strokes. The rated speeds of these motors do not exceed 200 rpm, which allows direct coupling to the propeller, eliminating the need for a reduction system. Compared to equivalent engines on the US or EU market, where medium or high speed four-stroke engines are preferred, the Japanese model has 6-cylinder in-line configurations, and the piston diameters of these engines may vary depending on the need for on market. For example, Akasaka Diesel built engines of the same type using piston diameters ranging from 220 mm to 510 mm, all with in-line 6-cylinder configuration.
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Peng, Baolong. "A Review of Research on Marine Main Propulsion Systems". Journal of Education and Educational Research 9, n.º 1 (25 de junio de 2024): 189–92. http://dx.doi.org/10.54097/n0y36x16.
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Ship power, as an essential component of ship engineering, directly affects the navigation performance, economy, and environmental friendliness of ships. This article reviews the development history of ship power, introduces the main propulsion devices including internal combustion engines, steam engines, and electric motors, and discusses the structure and optimization design of ship power systems. Modern ship power technology includes traditional diesel and gasoline engines, as well as new power devices such as liquefied natural gas (LNG) engines, hybrid power systems, and fuel cells. Electric ships are gaining attention due to their efficiency and environmental benefits. In the future, ship power technology will develop towards green environmental protection, intelligence, integration, diversification, and digitization, providing more reliable and efficient power support for the shipping industry and the advancement of ship engineering.
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Khooban, Mohammad Hassan, Navid Vafamand y Jalil Boudjadar. "Tracking Control for Hydrogen Fuel Cell Systems in Zero-Emission Ferry Ships". Complexity 2019 (15 de noviembre de 2019): 1–9. http://dx.doi.org/10.1155/2019/5358316.
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For more than a century, conventional marine vessels spatter the atmosphere with CO2 emissions and detrimental particles when operated by diesel motors/generators. Fuel cells have recently emerged as one of the most promising emission-free technologies for the electrification of ship propulsion systems. In fuel cell-based ship electrification, the entire marine power system is viewed as a direct current (DC) microgrid (MG) with constant power loads (CPLs). A challenge of such settings is how to stabilize the voltages and currents of the ship’s grid. In this paper, we propose a new modified backstepping controller to stabilize the MG voltage and currents. Finally, to study the performance and efficiency of our proposal, we run an experiment simulation using dSPACE real-time emulator.
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Pokusaev, Mikhail Nikolaevich, Anastasia Aleksandrovna Khmelnitskaya, Konstantin Evgenievich Khmelnitsky, Maxim Michailovich Gorbachev y Elena Georgievna Ilyina. "Analysis of harmful discharges into hydrosphere from Yanmar D27 diesel outboard motor". Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2022, n.º 3 (23 de agosto de 2022): 34–39. http://dx.doi.org/10.24143/2073-1574-2022-3-34-39.
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The article considers the necessity of studying the atmosphere and hydrosphere pollution due to the operation of marine transport engines and the introduction of relevant regulatory documents in the Russian Federation is substantiated. Today the problems of harmful emissions into the environment are considered haphazardly, there are few foreign authors studying the problem. Since 2016, the environmental characteristics of outboard motors in laboratory and scientific conditions have been studied at the Department of Water Transport Operation at the Astrakhan State Technical University. The results of practical measurements of harmful discharges into the hydrosphere from the Yanmar D2 outboard motor are presented. General characteristics of the Yanmar D2 engine are listed (rated power, rated speed, number of cylinders, fuel used, etc.), the general view of the outboard motor is illustrated. A detailed description of the laboratory equipment is given and the technical characteristics of control and measuring instruments (concentrator KN-3 and spectrophotometer PE-5400VI) are listed. It is pointed out that the small experimental pool of the laboratory has patents for a utility model; a schematic diagram of the pool is given. New data on discharges of film and dissolved petroleum products, phosphate ions and total phosphorus into the hydrosphere have been obtained, empirical formulas for calculating the expected level of discharges from a diesel outboard motor depending on its operation time have been developed.
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Bogdanowicz, Artur, Tomasz Kniaziewicz y Marcin Zacharewicz. "The Use of a Mathematical Model of Marine Diesel Engine in a Computer Program". New Trends in Production Engineering 1, n.º 1 (1 de octubre de 2018): 453–60. http://dx.doi.org/10.2478/ntpe-2018-0056.
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Abstract The paper describes the application of the author’s mathematical model of gas-dynamic processes for a marine piston engine based on a computer program. The developed mathematical and numerical model is designed to conduct simulation diagnostics. Therefore, it is possible to carry out calculations for motors in different technical conditions and observing influence of changes in technical condition on selected parameters of its work. Simulation of changes in technical condition is carried out by modifying parameters of structure’s model object. The article contains a detailed description of each options of the computer program. From the main program window, user can select type of engine model (supercharging method, cylinder number, work order, stroke and piston diameter and a number of other parameters). Through a window of simulation of known and recognizable damages such as: change in fuel dose for each cylinder, change in intake and outlet valves, leakage of piston-ring-cylinder system, change of injector hole cross section. Final windows show results of calculations in form of mileage parameters of engine as a function of crank angle.
Tesis sobre el tema "Marine diesel motors"
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Wei, Fang. "A study on the improvement of marine diesel engine transient performance by means of air injection". Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B36834841.
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Wei, Fang y 魏昉. "A study on the improvement of marine diesel engine transient performance by means of air injection". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B36834841.
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George, Sam. "Characterization of in-use emissions from marine engines". Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3339.
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Thesis (M.S.)--West Virginia University, 2004.Title from document title page. Document formatted into pages; contains xiv, 132 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 108-112).
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Nuszkowski, John. "Staten Island ferry emissions reduction". Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4169.
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Thesis (M.S.)--West Virginia University, 2005.Title from document title page. Document formatted into pages; contains xi, 94 p. : ill. (some col.), col. map. Includes abstract. Includes bibliographical references (p. 74-79).
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Agrawal, Harshit. "Analyses and impacts of emissions from marine engines". Diss., UC access only, 2009. http://proquest.umi.com/pqdweb?did=1974821941&sid=1&Fmt=2&clientId=48051&RQT=309&VName=PQD.
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Pagliato, Luca. "Studio e ottimizzazione di una testata pluriniettore per motore Diesel marino". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3460/.
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LION, SIMONE. "Waste heat recovery with Organic Rankine Cycle (ORC) in marine and commercial vehicles Diesel engine applications". Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2920081.
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Heavy and medium duty Diesel engines, for marine and commercial vehicles applications, reject more than 50-60% of the fuel energy in the form of heat, which does not contribute in terms of useful propulsion effect. Moreover, the increased attention towards the reduction of polluting emissions and fuel consumption is pushing engine manufacturers and fleet owners in the direction of increasing the overall powertrain efficiency, still considering acceptable investment and operational costs.
For these reasons, waste heat recovery systems, such as Organic Rankine Cycles (ORC), are undergoing a period of intense research and development.
However, in most of engine waste heat recovery studies in literature, the engine side analysis is not considered in a detailed way, even though the engine architecture and the operational behaviour strongly influence the availability of heat sources, and their characteristics, to be recovered using heat recovery systems. As an example, the use of emission reduction strategies, such as Exhaust Gas Recirculation (EGR), can introduce an additional heat source and modify the temperatures in the engine gas lines, thus leading to new possible scenarios for the exploitation of the engine wasted heat.
The scope of this work is to introduce a combined engine-waste heat recovery system analysis and design methodology, which could go beyond the traditional development approach, considering both the engine and the ORC system as a synergic and integrated powertrain. For this reason, industry-standard engine gas dynamics simulation software and thermodynamic process simulation techniques have been used and developed in order to study the combined effects and performance of engine-ORC systems in the commercial vehicle and marine sectors, addressing at the same time several development issues, such as: working fluid and layout choice, powertrain thermal management, energy utilization, turbocharging and emission reduction strategies, in the direction of a co-simulation approach, which is one of the industry’s main interests, to reduce development time and costs.
After a detailed literature review and modelling approach explanation, four different case studies have been proposed, to show an increasing level of integration between engine and ORC system analysis, addressing also applications which are not commonly considered in literature, such as off-highway vehicles and two-stroke ships propulsion units.
The combination of energy, exergy and economic analysis, allows the developer to deeply understand the thermodynamics of the combined engine-ORC systems, addressing all the energy and exergy streams available for heat recovery, highlighting the main sources of inefficiencies in the powertrain, and proposing improvements to increase the overall system efficiency at acceptable investment and operational costs. The methodology can be, in principle and with further developments, applied to any kind of engine-waste heat recovery system powertrain.
Moreover, the combined use of emission reduction strategies and new technologies, such as EGR and ORC, can allow to develop clean, but at the same time efficient, propulsion units. However, while for commercial vehicles the recovery of high temperature exhaust gas and EGR heat is more beneficial in terms of compromise between performance, system costs and packaging issues, in the case of large ship propulsion units, the recovery of lower temperature heat sources, such as coolant and scavenge air, could become very interesting for future developments, because of the high amount of heat available, even if at lower temperature levels, suitable for the use of an ORC technology.
The results of the proposed case studies show a fuel consumption reduction up to around 5-10% when adopting ORC systems, depending on the application, type of engine, overall system architecture and design point chosen, showing the potential of the technology in the considered sectors.
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Moussa-Nahim, Hassan. "Contribution à la modélisation et à la prédiction de défaillances sur les moteurs diesel marins". Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4307.
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Ce travail présente un modèle orienté vers le développement d’un simulateur pour un moteur diesel marin. Dans le but d’avoir un simulateur qui répond aux besoins du moteur étudié au niveau de l’efficacité, la rapidité, et la prise en considération des défauts, le modèle étudié est basé sur des modélisations physiques, semi physique, empirique, mathématique et thermodynamique. Le modèle du moteur est divisé en plusieurs sous-modèles chacun présente un système réel, ces systèmes sont : le refroidissement, la lubrification, l’air, l’injection, la combustion et les émissions. Les sous-modèles et les caractéristiques dynamiques du chaque bloc sont conçus en respectant les équations principales du fonctionnement du moteur ainsi que les données expérimentales collectées du banc d’essai du moteur marin diesel fabriqué par la société SIMB sous la référence 6M26SRP1. Ce modèle a été implémenté sur Matlab/Simulink, et la simulation calcule les variables suivantes : pression, température, efficacité, échange de chaleur, angle de vilebrequin, débit du fuel et émissions, et ceci dans les différentes sous-blocs. Le simulateur est utilisé pour montrer la performance du moteur lors de l’occurrence des défauts et peut aider dans l’application des stratégies d’optimisation pour le dimensionnement, de diagnostic et de pronosticThis work presents a simulator model of a marine diesel engine based on physical, semi-physical, mathematical and thermodynamic equations, allowing fast predictive simulations. The whole engine system is divided into several functional blocs: cooling, lubrication, air, injection, combustion and emissions. The sub-models and dynamic characteristics of individual blocs are established according to engine working principles equations and experimental data collected from a marine diesel engine test bench for SIMB Company under the reference 6M26SRP1. The overall engine system dynamics is expressed as a set of simultaneous algebraic and differential equations using sub-blocs and S-Functions of Matlab/Simulink. The simulation of this model, implemented on Matlab/Simulink has been validated and can be used to obtain engine performance, pressure, temperature, efficiency, heat release, crank angle, fuel rate, emissions at different sub-blocs. The simulator is used to study the engine performance in faulty conditions, and can be used also to assist marine engineers in FDI (fault detection and isolation) as well as designers to predict the behavior of the cooling system, lubrication system, injection system, combustion, emissions, in order to optimize the dimensions of different components
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Epalle, Thomas. "Simulation numérique de reformeur autothermique de diesel". Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC033/document.
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Le reformage autothermique, dans lequel une oxydation air carburant permet d’initier les réactions de formation d’hydrogène à partir de carburant et d’eau, semble une voie prometteuse pour la synthèse d’hydrogène à bord de navires. Son application au diesel, carburant majoritairement utilisé dans le secteur maritime, bien que moins bien connue académiquement que celle du méthane, permet une opérabilité du vaisseau sur l’ensemble du globe. Cependant les réacteurs associés sont particulièrement sujets au dépôt de carbone, néfaste pour leur durabilité, et requièrent alors une attention toute particulière au niveau des zones de mélange lors de leur conception. Dans les cas d’écoulements fortement tridimensionnels, une approche RANS couplée à un schéma cinétique décrivant les espèces gazeuses, est le plus souvent utilisée. Ce schéma consiste alors soit en un nombre succint de réactions empiriques, au risque de se montrer peu précis sur les niveaux de polluants, ou au contraire en des schémas d’une cinquantaine d’espèces issus de la réduction automatique de schémas complets, qui restent cependant trop lourds à utiliser lors d’une phase de conception. L’objectif de la thèse est alors de proposer une méthodologie pour décrire l’impact d’une géométrie sur les niveaux de polluants compatibles avec les outils habituellement utilisés dans le milieu industriel. Ainsi, la description du couplage chimie-écoulement est réalisée par le biais des logiciels Fluent R et de la suite Chemkin R de ANSYS R . Après une analyse de la chimie du reformage autothermique du diesel, une méthode de génération de schémas globaux d’une di-zaine d’espèces à partir d’un schéma détaillé est proposée. Elle est, par la suite appliquée avec succès à l’oxydation partielle du n-dodécane. Le schéma estalors utilisé dans la première simulation réactive de reformeur auto-thermique avec injection de diesel liquide réalisée à ce jour. Malgré les difficultés de validation dûes au manque de données experimentales et aux limitations des logiciels imposés, les résultats obtenus sont encourageantsAutothermal reformers use fuel-air oxidation to ensure production of hydrogen from fuel and water on-board. The use of diesel instead of better-known methan, permits the ships to be refuelled all around the world. These systems show strong sensitivity to carbon deposit which reduces their lifetime. Good knowledge of the fuel air mixing is thus required. Academic description of such tridimensional systems usually relies on the application of a RANS simulation coupled with gaseous chemical kinetics mechanism. These mechanisms can then consist on a few empirical reactions, or at the opposite, on quite large schemes, with more than 50 species derived automatically from big detailled schemes. The resulting description is then not enough precise, or at the opposite too computationally expensive to be used during design process. This thesis thus aims to develop an industrial compatible methodology to describe the impact of design geometry on pollutant formation. ANSYS software such as Fluent and Chemkin are then used to perform the simulation. An original method of limited size mechanism derivation from larger chemical scheme is proposed. It is succesfully applied to the generation of a partial oxidation mechanism of n-dodecane, from the results of diesel reforming chemical analysis. The resulting scheme is then applied on theliquid injection diesel autoreformer reactive simulation. Even if validation difficulties result from the lack of experimental data and limitations of the softwares, it remains the first simulation of this kind in the litterature, to our knowledge. Promising results are obtained
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Edfors, Jonas y Robin Bremberg. "Liquid Natural Gas : A study of the environmental impact of LNG in comparison to diesel". Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-103569.
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Liquefied Natural Gases (LNG) has been an alternative fuel in the marine industry for several years, but lately, the amount of ships that have been powered by methane has increased a lot. Some of the reasons for this is because LNG does not contain any sulfur and releases less nitrogen oxides than traditional maritime fuels. In this essay, LNG will be compared to diesel from an environmental perspective with focus on CO2 emissions and its equivalents. International Maritime Organization (IMO) implemented Energy Efficiency Design Index (EEDI) requirements that adjusts how much CO2 is allowed in the exhaust gas per produced kilowatt-hour (kWh). However, these requirements will increase in intervals in the future, the next one is coming 2022 for specific ship types. The method that is used to compare the fuels is Mole-calculations for LNG as well as diesel, then calculate the amount of carbon dioxide (CO2) and its equivalents they release. The results show that under optimal conditions, LNG was the superior choice. However, the maritime industry might have a problem with the requirements that will be introduced to greenhouse gas (GHG) emissions in 2050.Flytande Naturgas (LNG) har under flera år funnits som ett alternativt bränsle inom sjöfarten, men på senare tid så har skeppen som drivs av metan ökat markant. En anledning till detta är att LNG innehåller inget svavel samt släpper ut mindre NOX jämfört med traditionella bränslen. I denna uppsats så kommer LNG att jämföras mot diesel ur ett klimatperspektiv med fokus på koldioxidutsläpp och dess ekvivalenter. International Maritime Organisation (IMO) har infört Energy Efficiency Design Index (EEDI) krav som justerar hur mycket CO2 man får släppa ut per kilowattimme (kWh), dessa krav kommer dessutom att öka i flertalet intervaller i framtiden, varav nästa intervall redan sker i 2022 för speciella fartygstyper. Metoden som användes för att jämföra bränslena var att beräkna mol-innehållet för både LNG samt diesel, sen från den beräknade data se hur mycket koldioxid (CO2) inklusive ekvivalenter de släppte ut. Resultatet visade att under optimala förutsättningar så var LNG ett klart bättre alternativ än diesel. Däremot så kan sjöfarten ha ett problem inom framtiden från de krav som berör växthusgaser som kommer att ställas från och med 2050.
Libros sobre el tema "Marine diesel motors"
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Charnews, Dan. Marine diesel engines. Centreville, MD: Cornell Maritime Press, 2007.
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Pounder, C. Coulson. Pounder's marine diesel engines. 7a ed. Oxford: Butterworth-Heinemann, 1998.
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Woodward, John B. Low speed marine diesel. Malabar, Fla: R.E. Krieger Pub. Co., 1988.
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Castilla, Charles Ruiz de. Marine diesel engine maintenance. Venice, CA: Bennett Marine Video, 2004.
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Thiel, Richard. Keep your marine diesel running. Camden, Me: International Marine Pub., 1991.
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United States. Environmental Protection Agency. Office of Transportation and Air Quality. Effect of proposed evaporative emission standards for marine manufacturers. [Washington, D.C.]: U.S. Environmental Protection Agency, Air and Radiation, Office of Transportation and Air Quality, 2002.
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Goring, Loris. Marine inboard engines: Petrol and diesel. London: Adlard Coles, 1990.
Buscar texto completoCapítulos de libros sobre el tema "Marine diesel motors"
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"MaK (Caterpillar Motoren)". En Pounder's Marine Diesel Engines, 548–62. Elsevier, 2004. http://dx.doi.org/10.1016/b978-075065846-1/50022-5.
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Ferreira, Hozana de Souza, Maria Catarina de Farias Caldas, Pollyana Pereira do Nascimento, Maria Inez Campello Barata, Galba Maria de Campos Takaki y Rosileide Fontenele da Silva Andrade. "Potential of filamentous fungi in the biodegradation of petroderivatives and evaluation of the effect of surfactants". En CONNECTING EXPERTISE MULTIDISCIPLINARY DEVELOPMENT FOR THE FUTURE. Seven Editora, 2023. http://dx.doi.org/10.56238/connexpemultidisdevolpfut-005.
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The contamination of the environment by petroleum products is a current and growing concern due to high toxicity and difficult removal. New ecologically viable technologies, such as bioremediation, have been gaining prominence for using microorganisms and their metabolites to remove or degrade pollutants that affect marine and terrestrial ecosystems. In this context, the objective of this work was to evaluate the growth potential of filamentous fungi (Aspergillus foetidus and Rhizopus arrhizus) in petroderivatives, thus evaluating the potential of fungi in the biodegradation of petroderivatives (burnt motor oil, kerosene and diesel oil), in the presence and absence of surfactants. Therefore, the microorganisms were submitted to acclimatization in Sabouraud solid medium supplemented with different concentrations of burned motor oil (0%, 3% and 5%). Growth occurred during 72h at 28ºC. Then, the microorganisms were transferred to tubes containing Haas Bushnel medium and the 2,6-dichlorophenol-indophenol redox indicator (DCPIP) in the presence and absence of surfactants (natural and chemical). The results showed that Aspergillus foetidus and Rizopus arrhizus were able to grow at the maximum concentration of the petroderivative (5%), being therefore selected for the study of biodegradation. Aspergillus foetidus acclimatized with 5% of the burned engine oil was able to degrade (100%) the kerosene, both in the presence and absence of surfactants (chemical and natural). For the biodegradation of burnt engine oil (OQM) by Aspergillus foetidus the natural surfactant acted as a facilitating agent of biodegradation resulting in 100% degradation. Rhizopus arrhizus showed excellent biodegradation potential of diesel oil (100%), both in the presence and absence of surfactants (chemical and natural). Therefore, Aspergillus foetidus and Rhizopus arrhizus are promising microorganisms for biodegradation applications of kerosene and diesel oil, respectively. In addition, it was possible to prove that the surfactants (chemical and natural) did not show significant influence on the biodegradation of petroderivatives.
Actas de conferencias sobre el tema "Marine diesel motors"
1
Bø, Torstein I. y Eilif Pedersen. "Models and Methods for Efficiency Estimation of a Marine Electric Power Grid". En ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61625.
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Diesel electric propulsion has become industry standard for many marine applications. Typically, a significant part of the operations of vessels with diesel electric propulsion is done with low loads on the motors and generators. However, the efficiency of a drive train is typically only calculated for full load conditions. This underestimates the losses during low load conditions. This article presents modeling methods for the electric drive train, which can be used to estimate the efficiencies, also at low load. The models are established with limited parameter sets, as detailed information about of the components are seldom available. This article compares the estimated efficiency of the generator and motor with the given data from datasheets.
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Ghosh, Sujit, Tom Risley, David Sobolewski, William Welch y Sherry Williams. "Marine Alternative Fuel Performance Testing". En ASME 2012 Internal Combustion Engine Division Spring Technical Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ices2012-81239.
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As part of the U.S. Maritime Administration (MARAD) marine application of alternative fuel initiative, the U.S. Navy provided neat hydrotreated renewable diesel (HRD), derived from the hydroprocessing of algal oils, for operational and exhaust emission testing onboard the T/S STATE OF MICHIGAN. This vessel has diesel-electric propulsion with four caterpillar D-398 compression ignition engines; one of these ship service diesel engines was selected as the test engine. The diesel generator sets power both the propulsion motors propelling the ship and provide the electrical power for the hotel loads of the ship. Ultra-low sulfur diesel (ULSD) was blended with the neat HRD fuel in a 50/50-by-volume blend and tested for over 440 hours on the vessel. Exhaust emissions testing was performed while underway on Lake Michigan using the baseline ULSD assessed earlier. A similar profile was run using the blended test fuel. Emission testing was conducted using the ISO 8178 (D2) test cycle. When emissions testing was completed a series of underway and pierside test runs were conducted to accumulate the remaining engine hours, After all testing, the engine conditions were assessed again using a combination of visual inspection and oil analysis. The remainder of the test fuel will be used to conduct a long-term stability test. The setup, test, and results of this testing, currently underway, are reported here with a discussion of MARAD’s alternative fuels test initiative.
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Bø, Torstein I., Tor A. Johansen, Andreas R. Dahl, Michel R. Miyazaki, Eilif Pedersen, Børge Rokseth, Roger Skjetne et al. "Real-Time Marine Vessel and Power Plant Simulation". En ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41479.
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In this paper, we present a system simulator of a marine vessel and power plant which contains the mechanical system with diesel engines, propellers, steering gear, and thrusters; the electrical system with generators, switchboards, breakers, and motors; and the plant level controllers with dynamic positioning controller, thrust control, and power management system. Interconnections are possible to simulate by using a multi domain simulator. This is important when evaluating system performance and fault handling. The simulator is implemented in Simulink and is modular, configurable and scalable. It can be extended to run on National Instruments’ cRIO embedded control and acquisition system, for real-time simulation.
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Riis, Dan. "Developing Non-Gasoline Burning Outboard Motors for the UK MoD". En ASME 2005 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/icef2005-1223.
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The UK Ministry of Defence (MoD) operates a wide range of small, high performance boats, used in varying environments, and locations throughout the world. These boats primarily operate using outboard motors (OBMs) due to the optimum power to size and weight ratios they provide, and the ease of maintenance compared to inboard motor boats. The use of OBMs has, with the exception of a large and heavy 27hp diesel (compression ignition) OBM, necessitated the use of Petrol (CIVGAS - F67). This dependency evolved from the difficulty encountered developing a reliable compression ignition OBM over the full power range required (20–250hp) at acceptable power to weight/size ratios. Given the lack of a perceived market for such an engine, very little development work was done in this area in the private sector. The requirement to run OBMs on CIVGAS presents a number of problems for the MoD, including logistical, availability (especially for Special Forces), and safety (especially for HM Ships required to store the fuel on the upper decks). The Marine Propulsion Systems Integrated Project Team (MPS IPT) within MoD’s Defence Logistics Organisation (DLO), was therefore mandated to develop solutions aimed at removing MoD’s reliance on CIVGAS. This resulted in a two pronged approach investigating both micro-gas turbines and multi-fuel OBMs. This paper will present the issues encountered and the development work completed to-date developing multi-fuel reciprocating OBM technology. The primary focus has been developing direct injection, spark ignition multi-fuel OBM technology, capable of using petrol, AVTUR (F34), AVCAT (F44), diesel, and marine distillate oil (MDO - F76). The paper will discuss the project plan, the technologies involved, development work, including test and trials, and the way ahead for the future.
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Hendry, Morgan L. y Nicholas Bellamy. "Advantages and Experience of Using SSS (Synchro-Self-Shifting) Clutches in Hybrid Propulsion Such As CODELOG or CODELAG Naval Marine Systems". En ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91873.
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Abstract Hybrid marine ship propulsion systems are currently being used, and many more are being considered worldwide, including for commercial ships as well as for navies worldwide. These hybrid propulsion systems offer extended ship range and potentially quiet operation with propulsion on propeller shaft line electric motors. When high power and / or speed may be required, the main engines or turbines can be quickly started, and propeller shaft line clutches provide quick and reliable transition from or back to the electric motors. In the naval marine sector, several ship programs currently use “Combined Diesel Electric or Gas Turbine” (CODELOG) or “Combined Diesel Electric and Gas Turbine” (CODELAG) propulsion. Some utilize Synchronous Self-Shifting Clutches, and some utilize other types of non-automatic friction clutches. Many navies worldwide are considering this type of hybrid propulsion, but variations in machinery arrangements and components can result in significant differences in fuel efficiency, weight, space, first time cost, ship performance, and propulsion machinery lifecycle maintenance with associated cost. Therefore, serious investigation of the alternatives early in the ship design phase is important and accessing the experience of these existing systems with these components is vital, before settling on a machinery arrangement and its components for a future ship program. As the old cliché says, “The Devil is in the Details!” Like any system, the success, the reliability, and the ultimate capability often come down to design details and the components chosen. Naval ships are designed to operate, even when damaged or when control or oil supply systems fail. Simplicity and the ability to improvise is often the key to mission success or failure. Synchronous Self-Shifting Clutches, or SSS Clutches, have proven to be “fit and forget” in these propulsion systems, have performed without fail in battle conditions, and this paper will describe the systems, explore the alternatives for propulsion clutches, provide advantages and disadvantages, and will provide experience of SSS Clutches in hybrid propulsion systems.
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Ayers, William Norris. "DC Grids for Ship Propulsion: Benefits and Challenges". En SNAME Maritime Convention. SNAME, 2022. http://dx.doi.org/10.5957/smc-2022-037.
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While the application of lithium-ion batteries to propulsion has dominated the marine industry’s attention, another equally important shift is occurring. The standard alternating-current (AC) backbone of a diesel-electric is being replaced with direct current (DC). AC generators and motors remain but are connected through converters. This architecture is often referred to as a DC grid. They offer advantages such as reducing volume, weight and electrical harmonics while making it easier to interconnect DC sources like batteries, supercapacitors and fuel cells. Their biggest disadvantage is developing higher fault currents in a shorter amount of time than a comparable AC network. This has required unique protection schemes and led to a challenge for existing regulatory norms.
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Lim, Sangpil y Adam Harvey. "Selection and Development of the World’s Most Power-Dense Gas Turbine Module for the New Korean Frigate". En ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56446.
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The MT30 marine gas turbine has been developed specifically for 21st century naval propulsion using modern techniques and methods. Design and development of the MT30 began in 1999 and has since been qualified for naval service following extensive testing. Since then the engine has rapidly been adopted by progressive navies, in both its mechanical and electrical power generation configuration. The Lockheed Martin Littoral Combat Ship (LCS) is one of a new class of United States Navy (USN) fast combatants which has been at sea for more than six years and is powered by the MT30. A combined MT30-driven generator was selected for the new USN DDG1000 Zumwalt class of destroyer and has also been successfully installed into the Royal Navy’s Queen Elizabeth Class aircraft carrier. Most recently, the MT30 Compact Package has been selected to power the Royal Navy’s Type 26 Global Combat Ship which will be built by BAE Systems. The MT30 Compact Package has been designed with the aim of powering modern warship programmes, with the result that it is currently the World’s most power dense in-service marine gas turbine. This is an important factor in naval propulsion where delivering a high power output in a compact space is essential. In addition to the programmes stated above, the MT30 Compact Package was selected for the new Republic of Korea Navy’s (RoKN) frigate programme with a single-GT CODLOG hybrid arrangement consisting of propulsion motors and a Diesel-electric system. As a result, Rolls Royce was selected by the RoKN to deliver the MT30 Gas Turbine Unit and, from a preliminary Rolls-Royce compact package design, the engine and machinery division of Hyundai Heavy Industry (HHI-EMD) has developed the Compact Package for the New Korea Frigate. The MT30 GT was delivered to the HHI-EMD facility in 2014 with the surrounding Compact Package built at HHI-EMD before onward delivery to Daewoo Shipbuilding and Marine Engineering (DSME) where construction of the first frigate will take place. This paper provides the rationale for selection of the MT30 Compact Package for the New Korea Frigate Programme and also describes the development of the MT30 Compact Package; aspects of the design process, construction of the Compact Package and the factory acceptance test conducted at the HHI-EMD facility.
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Shiraishi, Keiichi y Venky Krishnan. "Electro-Assist Turbo for Marine Turbocharged Diesel Engines". En ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25667.
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Turbocharged diesel engines are widely used in the marine industry and have a significant impact on global CO2 and NOx emissions. Turbochargers are an integral component of any diesel engine and they play a critical role in their performance. Mitsubishi Heavy Industries (MHI) and Calnetix Technologies have developed a unique technology called the “Electro-Assist Turbo” (EAT). The EAT unit consists of a specially designed high speed permanent magnet motor directly mounted to the turbocharger rotating assembly. The high speed motor applies torque to the turbocharger rotor enabling it maintain or vary rotor speed at low engine exhaust flow rates in order to supply sufficient charge air to maximize engine performance. Turbocharged diesel engines suffer from inherent deficiencies at low engine speeds; there is not enough energy in the exhaust to produce an optimum and readily available level of boost for the engine intake air system at off-design points. This technology proves even more important as the majority of large marine vessels are now operating in a “slow steaming” part throttle mode. To date the majority of marine diesel engines use auxiliary air blowers (AAB) to supply additional air to the engine intake during off design point operation. These AABs are inefficient and not intended nor designed to be used in constant operation. The EAT unit can provide a higher discharge pressure at the same electrical power consumption as an AAB. This more efficient design with higher discharge pressure further improves fuel efficiency and eliminates the need to run an external piece of machinery during operation, thus lowering maintenance costs. This paper will provide an overview of the design, integration and initial testing of the 100kW Electro-Assist Turbo into a Mitsubishi Exhaust-gas Turbocharger (MET)-83 marine diesel turbocharger. In addition this paper will go over the custom designed aerodynamic motor housing structure that holds the non-rotating components without penalizing performance of the turbocharger, special software developed for the variable frequency drive system that enables the flexible operation of the high speed motor, and features of the high speed permanent magnet motor that allows for operation without any active cooling. Also, this paper will provide and discuss the initial test results of the EAT integrated into the MET-83 turbocharger along with engine testing results provided by MHI. Low cost designs will be discussed that enable turbochargers currently in operation to be retrofitted and the further improvements taking place to commercialize.
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Sanada, Kazushi y Tetsuro Miyazaki. "Application of DDVC Fuel Injection System to Ship Speed Control". En BATH/ASME 2016 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fpmc2016-1760.
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This paper describes an application of direct drive volume control (DDVC) to ship speed control. The DDVC fuel injection device consists of an AC servo motor, a fixed-displacement oil-hydraulic pump, and an oil-hydraulic cylinder. The cylinder piston pushes a fuel pump to pressurize fuel and an injection valve opens to inject fuel into a combustion chamber. Timing and the quantity of fuel injection can be controlled by the electric signal added to the AC servo motor. In this paper, the DDVC fuel injection device is applied to engine speed control of marine diesel engine and ship speed control. A simulation model is made including a model of the DDVC fuel injection device, propeller model, and hull motion model. Firstly, engine speed control system is proposed. Stop injection angle is automatically adjusted according to engine speed error signal. Secondarily, ship speed control is proposed. Propeller pitch angle is used to control ship speed. Simulation study of these control systems are presented to show the capability of the DDVC fuel injection device for marine diesel engine.
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Hendry, Morgan L. y Nicholas Bellamy. "Operational Experience of the SSS (Synchro-Self-Shifting) Clutch for Naval Marine Applications". En ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57819.
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The Synchro-Self-Shifting (SSS) overrunning clutch is well known, particularly in the Naval Marine field. This paper reviews the clutch operating principle, then outlines some of the service experience since 1962, particularly in naval main propulsion drives beginning with CODOG, CODAG, COGOG and COGAG plant, and then the experience with more recent applications such as combined electric motor propulsion with either gas turbines or diesel engines and hybrid electric plants. Extra features are then described such as a lock-out control as is usually necessary for turbine applications to permit turbine testing, e.g., when in harbor; also a lock-in control as is essential when the clutch has to transmit power in both directions of rotation. Various clutch mounting arrangements will be presented with respective advantages. The paper concludes with information regarding reliability during many years of service experience.