Artículos de revistas: "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.

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Yamafuji, Kazuo. "Factory Tour to Yamaha Motor". International Journal of Automation Technology 2, n.º 4 (5 de julio de 2008): 317–19. http://dx.doi.org/10.20965/ijat.2008.p0317.

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Yamaha Motor Co. Ltd., founded in 1955, is representative of global Japanese companies with factories worldwide that deliver a wide variety of products meeting customer needs. It employs 51,000 working on product lines including motorcycles, scooters, hybrid (power-assisted) bicycles, snowmobiles, boats, outboard motors, yachts, water vehicles, diesel engines, automobile engines, surface mounters for electronic parts, industrial robots, industrial unmanned helicopters, and electric wheelchairs. The December accounting term for fiscal 2007 showed unconsolidated sales of 799.2 billion yen and consolidated sales of 1,756.7 billion yen. The percentage of sales by product was 60.1% for motorcycles, 16.4% for marine use, 15.2% for special equipment, and 8.3% for others in the same fiscal year. The percentage of sales by region was 35.2% for the United States, 23.9% for Europe, 17.6% for Japan, 9.3% for Asia, and 14.0% for others. In the 21st century, Yamaha holds the basic philosophy of creating values and profits for sustainable growth and offering new excitement and a more fulfilling life for people worldwide.

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Victorovych Sagin, Sergii, Oleksiy Andriiovych Kuropyatnyk, Yurii Victorovych Zablotskyi y Oleksandr Victorovich Gaichenia. "Supplying of Marine Diesel Engine Ecological Parameters". Naše more 69, n.º 1 (marzo de 2022): 53–61. http://dx.doi.org/10.17818/nm/2022/1.7.

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The by-pass system of exhaust gas for the engine 6L20 Wartsila has been observed. The requirements of Annex VI MARPOL towards nitrogen oxide concentration in ship engine exhaust gases have been provided. The purpose of research was the determination of diesel 6L20 Wartsila by-pass exhaust gases optimum volume – at this the nitrogen oxide minimal concentration in exhaust gases is assured, the minimal increase (comparing with operation mode without by-pass) – specific effective fuel consumption, supporting of necessary thermal factor diapason of engine cylinders. The research was performed for the exhaust gas by-pass diapason 0…10 % with engine load diapason 0.55…0.85 % from nominal power. Upon experimental results it has been stated that the exhaust gas by-pass usage favors the ecological parameters of ships engine operation modes – by this at the range of exploitation load 0.55…0.85 % from nominal power the nitrogen oxide concentration in exhaust gas is decreased to 1.32….12.97 %. The exhaust gas by-pass impairs the combustion process and favors the increasing of specific effective fuel consumption and increasing the temperature of exhaust gases. The exhaust gas by-pass system effectiveness assessment should be performed by complex estimation of the following engine operation parameters: the nitrogen oxide concentration in exhaust gas, increasing of specific effective fuel consumption(SFOC), the exhaust gas temperature. As optimal degree of exhaust gas by-pass value when the maximum decrease of nitrogen oxide emission at minimal increase of fuel consumption and simultaneous engine thermal factor handling has to be considered.

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Hoang, Van Si y Van Vang Le. "Simulating the Torsional Vibration Signal of Two-Stroke Marine Diesel Engine with Normal Firing and Mis-Firing". Naše more 69, n.º 3 (noviembre de 2022): 143–48. http://dx.doi.org/10.17818/nm/2022/3.4.

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The article presented the modelling of torsional vibration signal of marine diesel engine, MAN B&W 6S46MC-C7, installed in general cargo ships 34000 DWT, built at Pha Rung Shipyard (Vietnam). The authors imitated the torsional vibration signal, based on the established signal modelling when diesel engine works normal firing and mis-firing state, according to the Class Regulation Rules for new building steel hull ships when calculating and measuring the torsional vibration of marine diesel propulsion shaft-line system. The authors used Matlab software to imitate the torsional vibration signals in the real time domain and then converted them into the frequency order by Fast Fourier Transform (FFT).

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Сагін, С. В. y Т. О. Столярик. "ANALYSIS OF OPERATIONAL CHARACTERISTICS MOTOR OILS OF MARINE DIESELS". SHIP POWER PLANTS 43, n.º 1 (7 de septiembre de 2021): 69–80. http://dx.doi.org/10.31653/smf343.2021.69-80.

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The analysis of the performance characteristics of engine oils used in the lubrication systems of marine diesel engines is carried out. The requirements for oils for various purposes are given. Recommendations on the choice of engine oils for lubricating and circulating lubrication systems of marine low- and medium-speed diesel engines are proposed.

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Pujiyanto, Fajar y Eka Darmana. "ANALISIS PERUBAHAN TEMPERATUR INDUKSI MOTOR 3 PHASE BERBASIS FUZZY INFERENCE SYSTEM (FIS)". JURNAL SAINS DAN TEKNOLOGI MARITIM 23, n.º 1 (27 de septiembre de 2022): 15. http://dx.doi.org/10.33556/jstm.v23i1.319.

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The three-phase induction motor is an alternative to changing the diesel engine as the main driver in the industrial world. This transition is aimed at energy efficiency and reducing air pollution from diesel engine exhaust gases. It was chosen because it is easy to operate, quiet and low operating costs. Induction motors are used for driving water pumps to as the main propulsion on board vessels. Constraints and failures of induction motor components when operating, cause a decrease in performance and risk of damage. This is due to winding disturbances, increasing motor temperature, unbalanced stator and rotor, broken rotor shafts, air gap eccentricity, motor load, mechanical and environmental effects. The cause of motor damaged is increased temperatures on the motor side. It occurs due to unbalanced phase voltage (UPV), unbalanced magnet pull (UMP) and motor load (ML). This journal discusses three factors and their effect on motor temperature based on Fuzzy Inference System (FIS). FIS analysis is used to simulate changes in motor temperature which are influenced by the variable values of these three factors. This paper uses a qualitative descriptive method with literature reviews and data analysis using FIS in a Matlab application. The analysis of the change in temperature of an induction motor with the three parameters based on FIS has been successfully carried out. The result of study concludes that UPV and UMP are the dominant factors as a cause of temperature changes in the induction motor compared to ML).Ådnanes, A. K. (2003). Maritime electrical installations and diesel electric propulsion. ABB AS Marine. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.115.966&amp;rep=rep1&amp;type=pdfAdvernesia. (2017). What is MATLAB and its Uses. Article/Id_ID.Ardana, I. W. R., & Sutawinaya, I. P. (2017). Pemodelan Sistem Kontroler Logika Fuzzy Pada Pengaturan Kecepatan Motor Induksi Menggunakan Perangkat Lunak Matlab / Simulink. Matrix : Jurnal Manajemen Teknologi Dan Informatika, 7(1), 1. https://doi.org/10.31940/matrix.v7i1.504Bergmeijer, P. (1992). The International Convention for the Prevention of Pollution from Ships. Ports As Nodal Points in a Global Transport System, 111(50), 259–270. https://doi.org/10.1016/b978-0-08-040994-8.50026-7Bonnett, A. H., & Soukup, G. C. (1986). in Squirrel Cage Induction Motors. I(6), 1165–1173.Bonnett, A. H., & Soukup, G. C. (1992). Cause and Analysis of Stator and Rotor Induction Motors. IEEE Transactions on Industry Applications, 28(4), 921–937.Hall, D. T. (1999). KNOWLEDGE MARINE Second Edition.International, C., Commission, E., Deshpande, V., Power, C., & No, O. (2004). Internationale International Standard. Order A Journal On The Theory Of Ordered Sets And Its Applications, 1997, 1–25.Kliman, G. B., Premerlani, W. J., Koegl, R. A., & Hoeweler, D. (1996). New approach to on-line turn fault detection in AC motors. Conference Record - IAS Annual Meeting (IEEE Industry Applications Society), 1, 687–693. https://doi.org/10.1109/ias.1996.557113Kusumadewi, S. (2003). Artificial Intelligence (Techniques and Applications). Graha Ilmu.McCoy, Gilbert A.; Douglass, J. G. (2014). Premium efficiency motor selection and application guide - A handbook for industry. 136. https://www.energy.gov/sites/prod/files/2014/04/f15/amo_motors_handbook_web.pdfMelka, B., Smolka, J., Hetmanczyk, J., & Lasek, P. (2019). Numerical and experimental analysis of heat dissipation intensification from electric motor. Energy, 182, 269–279. https://doi.org/10.1016/j.energy.2019.06.023Motors and Generator Section. (2009). NEMA Standards Publication MG 1-2009. 552, 775. https://law.resource.org/pub/us/cfr/ibr/005/nema.mg-1.2009.pdfMustafa, Demetgul, Muhammet, U. (Ed.). (1993). Parameter Estimation, Condition Monitoring and Diagnosis of Electrical Machines. 1993 (1st ed.). Janeza trdine 9. 51000 Rijeka, Croatia. https://doi.org/http://dx.d0i.org/10.5772/63169Nandi, S., Toliyat, H. A., & Li, X. (2005). Condition monitoring and fault diagnosis of electrical motors - A review. IEEE Transactions on Energy Conversion, 20(4), 719–729. https://doi.org/10.1109/TEC.2005.847955On, L. N. (n.d.). Lecture Notes on Machine-Ii.PP. (1999). Pp Ri No 41 Tahun 1999 Tentang Pengendalian Pencemaran Udara. Peraturan Pemerintah No. 41 Tentang Pengendalian Pencemaran Udara.Siddiqui, K. M., Sahay, K., & Giri, V. K. (2014). Health Monitoring and Fault Diagnosis in Induction Motor- A Review. International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, 3(1), 2320–3765.Squirrel, I. (n.d.). Lecture 1 Three-phase Induction Motor Construction and Principle of Operation 2 . Induction Motor Types : 1–9.Sri Kusumadewi, H. P. (2010). Fuzzy logic application for decision support. Graha Ilmu.Teknologi, I., & Seni, D. (2020). Analisa Thermal Overload Relay ( TOR ) Type Lrd08c Pada Sistem Proteksi Motor 3 Fasa Belt Conveyor. 1, 79–90.US Department of Energy. (2014). Determining Electric Motor Load Ranges. Motor Challenge, 1, 1. https://www.energy.gov/sites/prod/files/2014/04/f15/10097517.pdf<span style="font-size: 10.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-no-proof: yes;">Waide, P., & Brunner, C. U. (2011). Energy-Efficiency Policy Opportunities for Electric Motor-Driven Systems. Internationale Energy Agency, na(na), 132.

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Ivnev, Alexander Andreevich, Vladimir Anatoljevich Zhukov, Yuriy Evgenievich Khryashchyev y Alexander Ivanovich Yamanin. "Thermal tension of cylinder covers of transport diesel engines converted to marine diesels". Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2021, n.º 2 (31 de mayo de 2021): 55–64. http://dx.doi.org/10.24143/2073-1574-2021-2-55-64.

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The article describes the characteristics of thermal loading of the cylinder covers of transport diesel engines during their conversion to marine diesels. The engines of the CHN14/14 type produced by the Yaroslavl Motor Plant are proposed as promising for use in marine power plants. A special feature of the engine design is the individual four-valve cylinder heads, which have a complex geometric shape. The conversion of automobile engines, the cylinder heads of which were made of aluminum alloys, to marine ones is accompanied by an increase in the degree of their acceleration. The cylinder heads in operation experience significant thermal and mechanical loads, which causes the need for increased requirements for the materials of the cylinder heads. The rational choice of the cylinder head material is one of the most important tasks to be solved when upgrading and boosting engines. Experience in the operation of marine diesel engines shows that in order to ensure the required reliability under prolonged exposure to elevated temperatures due to forcing, it is necessary to choose cast iron as a structural material. A three-dimensional model of the cylinder head is developed. When performing the calculations, the boundary conditions are justified, taking into account the local nature of the distribution of thermal and mechanical effects on the diesel cylinder head. As a result of numerical modeling, the stress-strain states of cylinder heads made of high-strength cast iron, ductile iron and cast iron with vermicular graphite are determined and analyzed. There has been proved the preference for using cast irons with vermicular graphite, which have satisfactory casting and physical and mechanical properties. The advantages of using cast iron with vermicular graphite include a decrease in the temperature of the cylinder head in the area of the inter-valve bridge. The possibility of increasing the engine power from 330 to 560 kW when replacing aluminum alloys with cast iron with vermicular graphite for the manufacture of cylinder heads is proved.

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Shcherban, P. S., E. V. Mazur y S. N. Mazur. "The process parameter matrix method in controlling marine engine wear dynamics". Industrial laboratory. Diagnostics of materials 88, n.º 9 (21 de septiembre de 2022): 47–52. http://dx.doi.org/10.26896/1028-6861-2022-88-9-47-52.

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Determination of the analytical relationship between real time changes in the quality characteristics of motor oils and an assessment of the state of the mechanism units subjected to friction is important when predicting the tribological characteristics of marine diesel engines. Changes in the lubricant parameters reflect the current technical condition of the engine components and assemblies. A method of process parameter matrix (PPM) is proposed to control the wear dynamics of a marine diesel engine. PPM is used to process statistical data on the performance of oils used in a MAN B&W Diesel Den 6L28/32A marine diesel engine through 2007 to 2021. The results of practical studies of changes in the physicochemical characteristics of motor oils in real operating conditions are presented. The results obtained can be used in the development of specialized software that allows obtaining operational information about the dynamics of engine wear.

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Endro, Raden Dimas. "Analisa Unjuk Kerja Two Stroke Marine Diesel Engine Berbahan Bakar Campuran Biosolar dan Gasoline Ron 92". INOVTEK POLBENG 9, n.º 2 (28 de noviembre de 2019): 413. http://dx.doi.org/10.35314/ip.v9i2.1179.

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Ketidakpastian dunia tentang bahan bakar menghadirkan tantangan yang membutuhkan pemahaman yang lebih baik tentang bagaimana pengaruh bahan bakar terhadap perilaku motor diesel khususnya dan penggunaan campuran bahan bakar diesel(solar) dan bensin memungkinkan secara ekstrem dibuat secara yang sederhana dan progresif. Baru-baru ini, penggunaan bahan bakar bensin di motor diesel telah menarik minat karena efisiensi termal yang lebih baik daripada motor bensin dan motor diesel. Dua pendekatan yang biasanya diadopsi untuk menyalurkan bahan bakar campuran ke motor diesel. Salah satu strategi menggunakan port fuel injection untuk bahan bakar bensin dan injeksi langsung untuk bahan bakar diesel, yang dikenal sebagai gasoline homogeneous charge induced ignition. Strategi lain memadukan bahan bakar diesel dan bensin bersama sama sebelumnya secara langsung sebelum menginjeksikan campuran bahan bakar ke dalam selinder ruang bakar. Penelitian ini dilakukakan yang pertama untuk mendapatkan seberapa besar pengaruh pencampuran bahan bakar diesel(biosolar) dan bahan bakar bensin(Gasoline ron 92) terhadap unjuk kerja motor diesel. Dan yang kedua untuk mendapatkan prosentase campuran bahan bakar diesel(biosolar) dan bahan bakar bensin(Gasoline ron 92) yang menghasilkan unjuk kerja paling optimal. Metode yang digunakan dalam melakukan penelitian ini adalah metode eksperimental. Pengujian dilakukan dengan melakukan eksperimen pada variasi campuran bahan bakar antara biosolar dan Gasoline Ron 92. Lalu akan dilakukan pengamatan terhadap unjuk kerja dari motor diesel yang digunakan untuk melakukan penelitian ini. Parameter unjuk kerja yang akan diamati adalah daya mesin dan bsfc. Hasil analisa terhadap BSFC pada beban simulator balast load, half load dan full load dari keempat bahan bakar BG5, BG10, B15 dan B20 adalah bahan bakar campuran BG15 mempunyai keunggulan BSFC paling rendah disusul bahan bakar B20, B10 dan BG5. Hasil analisa terhadap daya motor diesel PE(kW) pada beban simulator balast load, half load dan full load dari keempat bahan bakar BG5, BG10, B15 dan B20 adalah bahan bakar campuran BG15 mempunyai keunggulan daya motor paling tinggi disusul bahan bakar BG20.

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Сагин, Сергей Викторович y Тимур Александрович Столярик. "Dynamics of marine diesels when using motor oils with different structural characteristics". Automation of ship technical facilities 27, n.º 1 (25 de noviembre de 2021): 108–19. http://dx.doi.org/10.31653/1819-3293-2021-1-27-108-119.

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Annotation – The influence of the structural characteristics of engine lube oil on the dynamics of a marine diesel engine is considered. It is indicated that micron layers of marine engine lube oils separating the contact surfaces of marine diesel engines acquire the properties of liquid crystals and are characterized by an ordered molecular structure. The qualitative indicator of this structure is the degree of ordering of the molecules, and the quantitative indicator is the thickness of the ordered (boundary) lubricating layer. It is proposed to determine the structural characteristics of marine engine lube oils (the degree of ordering of the molecules of the boundary layer and its thickness) using the optical method of absorption dichroism. A diagram of an experimental setup is presented that allows such studies to be carried out. It has been experimentally established that for Shell Rimula X15 and Castrol TPL 123 engine lube oils (used in the oil system of the Caterpillar CatC18 marine diesel engine), the thickness of the ordered (boundary) lubricating layer is 14.3 ... 14.7 microns and 16.4 ... 16.6 microns, respectively. The degree of ordering of molecules in the boundary layer for Shell Rimula X15 engine lube oil is in the range of 0.56 ... 0.58, for Castrol TPL 123 engine lube oil – in the range of 0.63 ... 0.64. The results of studies of the dynamics of the CatC18 marine diesel engine by Caterpillar, carried out in the starting mode, as well as at various increases and decreases in load, are presented. As indicators, which were used to assess the dynamics of the diesel engine, the overshoot of the rotational speed and the time to reach a new steady state mode were taken. Experiments have confirmed that Castrol TPL 123 engine lube oil, which has a higher molecular structure in the boundary layer compared to Shell Rimula X15 lube oil, ensures the transient processes of the Caterpillar CatC18 marine diesel engine with less overspeed and less time to reach a new state work. The proposed technology for determining the structural characteristics of engine lube oils can be used for any type and grade of oil (mineral or synthetic, high and low viscosity, used both in circulating and cylinder lubrication systems). The proposed method for assessing the dynamic characteristics of marine diesel engines (by overshoot of the speed and the time to reach a steady state of operation in the event of a change in load) can be used for any types of internal combustion engines (low-, medium- and high-speed; as well as performing the functions of both main and auxiliary engines).

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Glazyk, Dmitry Konstantinovich, Vladimir Viktorovich Manitsyn y Rafail Ravilevich Simashov. "Determination of diesels lubricating oil consumption norms taking into account innovative technology of regeneration on ships". Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2020, n.º 2 (22 de mayo de 2020): 81–91. http://dx.doi.org/10.24143/2073-1574-2020-2-81-91.

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The article considers the current methods of calculating norms of lubricating oil consumption by marine diesels that provide for three causes of oil loss: oil burning, evaporation rate, and replacement expense. According to the manual, the lubricating oil consumption for replacement is considered only in trunk diesel engines; in main crosshead diesel engines with capacity over 3000 kW it is not considered and not performed. The lubricating oil consumption norms are proposed to carry out in terms of burnout and evaporation, according to the methods of determining fuel consumption norms. To determine consumption norms, it is necessary to know the oil consumption characteristic in relation to the load of the diesels and the load distribution in the ship operating mode. In the low speed crosshead diesel engines the circulating oil is only consumed for evaporation, but the trunk diesel engines consume oil for evaporation, burnout and replacement. The diagram of dependence of the relative cylinder oil consumption on the relative load of the diesel engine in the helical characteristic mode is illustrated. A simplified technological scheme of low-tonnage regeneration of the used motor oils is presented. It is proposed to calculate the oil consumption by the lubrication pump according to a nonlinear dependence based on the speed of the crankshaft at a specific mode. The analysis of the evaporation and burnout is recommended to carry out using a linear relationship, subject to oil consumption in the idle mode. The cost of circulating oil replacement is recommended to calculate according to the diesel operating time. Application of the used lubricating oil regeneration by means of a ship small-sized plant allows to achieve the oil consumption reduction by 19-48% depending on the ship operating mo

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21

Stoliaryk, Tymur. "Analysis of the operation of marine diesel engines when using engine oils with different structural characteristics". Technology audit and production reserves 5, n.º 1(67) (24 de octubre de 2022): 22–32. http://dx.doi.org/10.15587/2706-5448.2022.265868.

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The object of research is the process of lubrication of marine trunk diesel engines. The subject of research is marine diesel engine oils, which provide lubrication, cooling and separation of friction surfaces. The analysis of the operation of marine diesel engines using motor oils with different structural characteristics is carried out. The studies are carried out on Yanmar 6EY18AL diesel engines of a Multipurpose Vessel class ship with deadweight of 27540 tons. The objective of research is to determine the effect of the structural characteristics of the oil layer (contact angle and thickness) on the performance parameters of a marine diesel engine and the performance characteristics of the oil used in its circulating lubrication system. At the same time, the compression pressure, the concentration of nitrogen oxides in the exhaust gases, and the temperature of the exhaust gases after the cylinder are considered as the operating parameters of the diesel engine; as performance characteristics of the oil – its Base Number, as well as its Wear and Contaminant Elements. The studies are carried out on two diesel engines of the same type, in the circulating lubrication system of which oils with different structural characteristics were used. Structural characteristics of the oil layer were determined by ellipsometry. The operational characteristics of the diesel engine – using the Doctor diagnostic system. Oil performance – by spectrographic analysis. It has been established that an increase in the contact angles of wetting and the thickness of the oil layer improves the heat and power and environmental performance of a diesel engine. At the same time (for the period of operation of diesel engines 500–1000 hours), the decrease in compression pressure in the cylinder slows down, the temperature of gases after the cylinder decreases, and the emission of nitrogen oxides with exhaust gases decreases. In addition, the wear of diesel parts and oil oxidation are reduced. The information obtained in the course of the study on the structural characteristics of motor oils will provide the possibility of their selection and further use of those that will contribute to a better maintenance of the operational performance of marine diesel engines.

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22

Yusha, V. L., G. I. Chernov, I. D. Obukhov, O. G. Bessonov, V. V. Denisenko, A. A. Goncharenko y V. B. Shipov. "Multipurpose conversion of marine diesel engines when creating piston motor-compressor units". Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 5, n.º 3 (2021): 14–22. http://dx.doi.org/10.25206/2588-0373-2021-5-3-14-22.

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This paper present an assessment of the energy efficiency of various combinations of piston stages of an internal combustion engine, a compressor, and a Rankine engine as part of piston motor-compressor units based on modernized marine diesel engines. An eight-cylinder single-row diesel engine 8Ch23/30-1 is chosen as the object of research, the base of which is used as a single platform for creating powertechnology units for various purposes and power. The proposed variants for converting the original engine allow, with minimal costs for the development of design and manufacturing technology, to create gas engine compressor units with reduced fuel consumption and improved weight and size characteristics in comparison with the known mobile compressor stations driven by diesel internal combustion engines. In the paper, on the basis of the developed mathematical models of working processes, the possibility of joint operation of diesel cylinders with piston expanders of the Rankine cycle and one or more stages of a piston compressor is assessed. Various possible combinations of diesel cylinders, compressor cylinders and expander cylinders are considered, as well as the dependences of engine power and compressor performance depending on the number of compressor stages and the number of diesel power cylinders used.

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23

Xiao, Nengqi, Ruiping Zhou, Xiang Xu y Xichen Lin. "Study on Vibration of Marine Diesel-Electric Hybrid Propulsion System". Mathematical Problems in Engineering 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/8130246.

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This study analyzes the characteristics of hybrid propulsion shafting and builds mathematical models and vibration equations of shafting using the lumped parameter method. Main focus is on the asymmetric double diesel propulsion shafting operation process and the impact of the phase angle and motor excitation on torsional vibration of shafting. Model result is validated by testing results conducted on double diesel propulsion shafting bench. Mathematical model and model-building methods of shafting are correct.

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24

Yando, Markus, Amiruddin Amiruddin, Bambang Wahyudi y Ryan Pengestu N. "ANALYSIS OF THE MAIN GENERATOR DUAL FUEL DIESEL ELECTRIC (DFDE) 12V50DF SUDDEN TRIP". Dinasti International Journal of Digital Business Management 2, n.º 4 (27 de julio de 2021): 625–36. http://dx.doi.org/10.31933/dijdbm.v2i4.908.

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In the 20th century, the growth of marine transportation has grown rapidly in line with technological advances. Given that the marine transportation sector is one of the pollutants that exist today, the use of energy sources with better thermal efficiency and combustion that does not have a negative impact on the environment is needed in the modern era. In accordance with the regulations stipulated by IMO in the Marine Polution (Marpol) Annex VI Regulation 14 which regulates the prohibition of ships from using fuels with sulfur content higher than 0.5%. The need for alternative fuels in the shipping industry is an important thought to support the efficiency of the shipping industry. Liquid Natural Gas (LNG) is currently being developed by the government as a fuel for vehicles and environmentally friendly industries. In addition to its availability, natural gas is also considered effective for combustion. Methane / LNG gas is one of the most dominant alternative fuels at this time. This fuel can also save company expenses, namely reducing the cost of providing fuel for energy needs as a source of propulsion on board the ship. For the above, ships, especially LNG carriers, have used a lot of diesel engines to propel their ships using LNG fuel with the concept of the engine being Two Fuel Diesel Electric (DFDE) where the engine can use Marine Diesel Oil (MDO) and LNG. The DFDE engine drives the Generator and the Generator generates electricity to drive the Electric Motor and the Electric motor moves the propeller shaft, this DFDE engine in the future will replace conventional diesel engines because it is more cost efficient, but requires Engineers who understand DFDE engine technology.

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25

Pelić, Vladimir, Tomislav Mrakovčić, Ozren Bukovac y Marko Valčić. "Development and Validation of 4 Stroke Marine Diesel Engine Numerical Model". Journal of Maritime & Transportation Science 3, n.º 3 (junio de 2020): 359–72. http://dx.doi.org/10.18048/2020.00.27.

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Increasing demands on energy efficiency and environmental acceptance are being imposed on marine propulsion plants. The fulfilment of the conditions set by the MARPOL Convention, Annex VI, regarding the emissions from exhaust gases of marine diesel engines is of particular interest. This paper presents the development and validation of a zero-dimensional, single-zone diesel engine numerical model. Presented numerical model is based on the law of conservation of energy and mass and solving the resulting differential equations. The single-zone model will serve as the basis for a model where the cylinder space is divided into two or three zones during combustion. In this way, the multi-zone model will allow the modelling of nitrogen oxide emissions with satisfactory accuracy. Validation of the diesel engine model was carried out for the Wärtsilä 12V50DF 11700 kW motor designed to drive a synchronous alternator. Obtained results and deviations of certain parameters in the operation of the engine with respect to the data obtained from the measurements on the test bed, are more than satisfactory regarding complexity of the numerical model. This confirmed the usability of the model for research purposes to optimize the marine diesel engine.

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26

Veljačić, Zoran y Krešimir Grilec. "Increasing the Wear Resistance of Marine Diesel Engines Elements Made of Ductile Iron". Naše more 68, n.º 3 (septiembre de 2021): 150–56. http://dx.doi.org/10.17818/nm/2021/3.2.

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This paper examines the influence of austempering and shot peening on the wear resistance of ductile iron. Samples for further testing were made from mechanically processed casts. The hardness and microstructure of ductile iron were examined on the prepared samples. Metallographic analysis of ductile cast iron samples in the cast state determined the pearlitic-ferritic structure of the matrix characteristic of this type of cast iron. Pearlite predominates in the structure, and the rest consists of ferrite and graphite nodules. The samples were then austempered. The isothermal conversion was 240 °C. After austempering, the hardness was measured and the microstructure was characterized, and the changes that occurred in relation to the heat-treated ductile iron were studied. Austempering created a new austempered structure, harder than that in the cast state, which led to improved mechanical properties. A needle-like structure of lower bainite (ADI) with high-carbon austenite, untransformed austenite, martensite and graphite nodules was achieved. The selected parameters of the shot peening process deformed the surface of the ADI and achieved a mostly martensitic structure without the presence of a soft phase, which increased resistance to abrasion. Additional hardening of the substrate by the shot peening process resulted in a composite material with the properties of comparative steel parts, which are lighter, cheaper and easier to manufacture, more resistant to wear and quieter in operation. Such material should have an even wider application in mechanical engineering, and thus in the construction of marine machinery and plants.

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27

Haryono, Edi. "Analisa Pengaruh Penggunaan Bahan Bakar Diesel Like Fuel dan Minyak Solar Terhadap Unjuk Kerja Multi Swirl Combustion System (MSCS) Piston Chamber pada Small Marine Diesel Engine". INOVTEK POLBENG 9, n.º 2 (28 de noviembre de 2019): 402. http://dx.doi.org/10.35314/ip.v9i2.1176.

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Produksi minyak dunia diperkirakan telah mencapai puncaknya pada tahun 2000, ini berarti bahwa eksplorasi minyak bumi sudah maksimal dan selanjutnya akan mengalami penurunan. Ini akan menyebabkan dalam kurun waktu 20 tahun produksi minyak dunia akan kembali seperti pada tahun 1980-an(OPEC ,2009). Di lain pihak ketergantungan terhadap minyak bumi pada waktu yang sama akan terus meningkat akibat pertambahan penduduk dan kegiatan industri dan pembangunan. Akibat dari hal ini adalah harga energi yang semakin tinggi dan pasokan minyak yang menurun. Hal ini dapat dirasakan dari naiknya harga minyak mentah dan dicabutnya subsidi harga bahan bakar minyak oleh pemerintah Indonesia. Pada penelitian ini peneliti tertarik pada minyak solar dari oli bekas(Diesel – Like Fuel) di gunakan sebagai bahan bakar pada motor diesel dengan menggunakan Multi Swirl Combustion System (MSCS) Piston Chamber. Penelitian ini dilakukakan untuk mengetahui unjuk kerja dari motor diesel Multi Swirl Combustion System (MSCS) Piston Chamber saat menggunakan bahan bakar solar dari daur ulang minyak pelumas bekas(Diesel – Like Fuel) dan minyak solar(Pertamina Dex) sebagai pembanding. Metode yang digunakan dalam melakukan penelitian ini adalah metode eksperimental. Pengujian dilakukan dengan melakukan eksperimen pada variasi bahan bakar. Lalu akan dilakukan pengamatan terhadap unjuk kerja dari motor diesel yang digunakan untuk melakukan penelitian ini. Parameter unjuk kerja yang akan diamati adalah daya motordan BSFC. Dari hasil analisa terhadap daya motor diesel PE(Watt) penggunaan MSCS Piston Chamber pada beban 1000 Watt, 1500 Watt, dan 2000 Watt, nilai PE(Watt) pertamina dex lebih tinggi dari Diesel – Like Fuel/DLF sebesar rata – rata 9,86 %, 10,09 %, dan 10,32 %. Dari hasil analisa terhadap BSFC penggunaan MSCS Piston Chamber pada beban 1000 Watt, 1500 Watt, dan 2000 Watt, BSFC pertamina dex lebih rendah dari Diesel – Like Fuel/DLF sebesar rata – rata 6,36 %, 8,98 % dan 13,26 %. Dapat ditarik kesimpulan berdasarkan BSFC dan daya motor(PE) penggunaan bahan bakar minyak solar(Pertamina Dex) lebih ekonomis dibandingkan dengan minyak solar dari oli bekas(Diesel – Like Fuel)

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28

Sagin, Sergii, Volodymyr Madey y Tymur Stoliaryk. "Analysis of mechanical energy losses in marine diesels". Technology audit and production reserves 5, n.º 2(61) (23 de septiembre de 2021): 26–32. http://dx.doi.org/10.15587/2706-5448.2021.239698.

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The object of research is marine diesel engine oils, which provide lubrication, cooling and separation of friction surfaces. The subject of the research is the process of ensuring minimum mechanical losses in marine diesel engines. A problematic point in ensuring the lubrication of the cylinder-piston group and motion bearings is the lack of analytical and experimental studies that establish the relationship between the structural characteristics of engine oils and mechanical losses arising in marine internal combustion engines. The degree of orientational ordering of molecules and the thickness of the boundary lubricating layer are considered as the structural characteristics of engine oils. The determination of these values was carried out using the optical method based on the anisotropy of the light absorption coefficient by the boundary lubricant layer and the isotropic volume of the liquid (engine oil). The assessment of the level of mechanical losses arising in marine diesel engines was carried out according to an indirect indicator – the overshoot of the rotational speed and the time to reach the steady state of operation in the event of a change in load. It has been experimentally established that for engine oils used in marine internal combustion engines, the thickness of the boundary layer can be 15–17.5 µm. Motor oils, which are characterized by a higher ordering of molecules and a thickness of the boundary lubricant layer, ensure the flow of transient dynamic processes with less overshoot and a shorter transient time. This ensures the level of minimal mechanical losses occurring in marine diesel engines. The technology for determining the structural characteristics of engine oils can be used for any type and grade of oil (mineral or synthetic; high or low viscosity; used in both circulating and cylinder lubrication systems). The method of indirect assessment of mechanical losses of marine diesel engines can be used for any types of internal combustion engines of ships of sea and river transport (low-, medium- and high-speed; as well as performing the functions of both main and auxiliary engines).

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29

Victorovych Sagin, Sergii y Oleksiy Andriiovych Kuropyatnyk. "The Use of Exhaust Gas Recirculation for Ensuring the Environmental Performance of Marine Diesel Engines". Naše more 65, n.º 2 (junio de 2018): 78–86. http://dx.doi.org/10.17818/nm/2018/2.3.

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30

Haryono, Edi. "Kajian Eksperimental Pengaruh Tekanan Injektor Pada Penggunaan Bahan Bakar Solar Dari Daur Ulang Minyak(Diesel – Like Fuel) Pelumas Bekas Terhadap Unjuk Kerja Four Stroke Small Marine Diesel Engine Pada Beban 2000 Watt". INOVTEK POLBENG 8, n.º 2 (31 de diciembre de 2018): 304. http://dx.doi.org/10.35314/ip.v8i2.806.

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Penggunaan bahan bakar minyak bumi pada saat ini semakin tinggi termasuk solar. Namun dengan semakin tingginya angka permintaan terhadap bahan bakar solar, persedian solar semakin sedikit dari kurun waktu ke waktu. Karena bahan bakar solar berasal dari minya bumi. Dimana minyak bumi merupakan sumber daya alam yang tidak dapat diperbaharui. Oleh karena itu sekarang ini sudah banyak penelitian untuk mengembangkan bahan bakar alternatif untuk menggantikan solar dari minyak bumi. Pada penelitian ini peneliti tertarik pada oli bekas yang tersedia baik oli bekas dari kendaraan ringan maupun berat seperti minyak pelumas bekas dari alat – alat berat dan marine engine di kapal. Oleh sebab itu perlu dicari cara untuk memanfaatkan minyak pelumas bekas sebagai bahan bakar pada motor diesel dengan proses yang mudah dan murah. Penelitian ini dilakukakan untuk mendapatkan tekanan optimal pada injektor pada saat menggunakan solar dari daur ulang minyak pelumas bekas(Diesel – Like Fuel) sebagai bahan bakar dan dapat mengetahui unjuk kerja dari motor diesel saat menggunakan bahan bakar solar dari daur ulang minyak pelumas bekas tersebut. Metode yang digunakan dalam melakukan penelitian ini adalah metode eksperimental. Pengujian dilakukan dengan melakukan eksperimen pada variasi tekanan injektor 130, 140, 150, 160 Bar. Lalu akan dilakukan pengamatan terhadap unjuk kerja dari motor diesel yang digunakan untuk melakukan penelitian ini. Parameter unjuk kerja yang akan diamati adalah daya mesin dan BSFC. Dari hasil analisa terhadap daya motor diesel PE(Watt) pada penggunaan bahan bakar pertamina dex lebih tinggi daya yang dihasilkan dibandingkan dengan penggunaan bahan bakar Diesel – Like Fuel/DLF sebesar rata – rata 8,29 %, 11,23 %, 13,37 %, 15,78 % pada semua kondisi tekanan injektor. Dari Hasil analisa terhadap BSFC pada tekanan injektor 130 Bar, 140 Bar, 150 Bar, BSFC pertamina dex lebih rendah dari Diesel – Like Fuel/DLF sebesar rata – rata 5,91 %, 3,86 %, 6,37 %. Kecuali pada injektor 160 Bar, BSFC pertamina dex lebih tinggi dari Diesel – Like Fuel/DLF sebesar 6,34 %. Dapat ditarik kesimpulan berdasarkan BSFC dan daya motor(PE) agar bahan bakar Diesel – Like Fuel/DLF penggunaannya lebih ekonomis dioperasikan pada kondisi tekanan injektor 160 Bar.

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31

Cheng, Peng, Peng Qin y Ji Hui Li. "Research and Simulation Analysis on Fault of Marine Integrated Electric Propulsion System". Advanced Materials Research 722 (julio de 2013): 116–20. http://dx.doi.org/10.4028/www.scientific.net/amr.722.116.

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In this paper, neutral grounding mode, short-circuit failure and loss of excitation of marine integrated electric propulsion system are analyzed and summarized. Marine integrated electric propulsion system module is built in PSCAD/EMTDC. Diesel generator and its excitation module, permanent magnet synchronous propulsion motor and load module,inverter module is included in the system, Short-circuit failure and loss of excitation was added to the simulation system. The changing process of ship electric propulsion system failure is obtained.

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32

Kicha, Gennadiy Petrovich, Maksim Anatol'evich Serebryakov, Ruslan Alekseevich Kriuchkov y Andrey Veniaminovich Nadezhkin. "Modeling and evaluation of the engine oil aging intensity in marine trunk diesel engines when they are supercharged". Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2024, n.º 1 (29 de febrero de 2024): 45–57. http://dx.doi.org/10.24143/2073-1574-2024-1-45-57.

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A computational and experimental model of the aging of lubricating oil in different directions is presented, taking into account the influence on the intensity of its degradation of the degree of forcing (thermal load) and the technical condition of diesel, the quality (motor group) of the lubricant product and the sulfur content in the fuel. The novelty in assessing the aging of the lubricant in a tank diesel engine when forcing it by supercharging consists in the formation of a thermal load on the oil film, which determines the aging rate of the engine oil on the cylinder sleeve of the engine. It is reported how the density of the heat flux acting on the surface of the oil film swept by the piston is experimentally fixed and averaged over the height of the sleeve and the angle of rotation of the crankshaft during the engine operating cycle. The influence of the factors under consideration on the specific rate of aging of lubricating oil per unit area of the sleeve surface in contact with gases in the direction of additive activation, decrease in alkalinity, increase in acidity, tar formation and accumulation of insoluble products has been identified. The lines of equal values of the hypersurfaces of the response functions for the specific intensity of the alkalinity response and the formation of insoluble products of tar formation and acidity growth are illustrated. The requirements for engine oil have been formed according to the level of alloying with multifunctional additives, depending on the degree of boost (average effective pressure) of supercharged marine tank diesels. As a result of the analysis of the aging rate of engine oil in modern marine diesel engines with medium and high boost, the expediency of using unified type oils in them has been confirmed M-10(14)G2CS and M-14(16)DCL20 with multifunctional additives MASK and PMS for the combustion of distillate fuels and their mixtures with fuel oils with a sulfur content of up to 0.5%.

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33

Nam, Cao Dao, Danh Chan Nguyen y Van Huong Dong. "Heating System for the use of Bio-Oils for Marine Engines". European Journal of Engineering Research and Science 4, n.º 3 (26 de marzo de 2019): 157–62. http://dx.doi.org/10.24018/ejers.2019.4.3.1211.

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Biofuel is a fuel made directly or indirectly from organic materials - biomass, consisting of two main sources from plants and animal waste, not from fossil sources such as oil, coal. At present, biofuels account for about 20% of global energy consumption. Particularly there are some countries, the use of biofuels is even bigger, such as Germany, Brazil, India ..., these are the leading countries in proving the availability and superiority of biofuels. Because fossil energy reserves are declining rapidly, as well as their use which has many consequences for habitat, bioenergy is an inevitable development for the future. Some typical types of biofuels that are widely known today include: bioethanol (bioetanol), biodiesel (biodiesel), green diesel (diesel), biological kerosene (biokerosen-or reactive fuel). biological forces), other biological alcohols (methanol, butanol), bio ether, biogas, syngas, solid biomass fuels. In fact, the two most important biofuels are bioetanol and biodiesel, because of the many properties they have: use for the two most common types of transport (gasoline and motor vehicles). Diesel engine has many properties similar to fossil fuels, but cleaner and cleaner; produced from abundant and renewable materials such as sugar, starch, animal and vegetable fats and oils. The paper presents the heating methods for the use of high-viscosity fuels for diesel engines.

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34

Nam, Cao Dao, Danh Chan Nguyen y Van Huong Dong. "Heating System for the use of Bio-Oils for Marine Engines". European Journal of Engineering and Technology Research 4, n.º 3 (26 de marzo de 2019): 157–62. http://dx.doi.org/10.24018/ejeng.2019.4.3.1211.

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Biofuel is a fuel made directly or indirectly from organic materials - biomass, consisting of two main sources from plants and animal waste, not from fossil sources such as oil, coal. At present, biofuels account for about 20% of global energy consumption. Particularly there are some countries, the use of biofuels is even bigger, such as Germany, Brazil, India ..., these are the leading countries in proving the availability and superiority of biofuels. Because fossil energy reserves are declining rapidly, as well as their use which has many consequences for habitat, bioenergy is an inevitable development for the future. Some typical types of biofuels that are widely known today include: bioethanol (bioetanol), biodiesel (biodiesel), green diesel (diesel), biological kerosene (biokerosen-or reactive fuel). biological forces), other biological alcohols (methanol, butanol), bio ether, biogas, syngas, solid biomass fuels. In fact, the two most important biofuels are bioetanol and biodiesel, because of the many properties they have: use for the two most common types of transport (gasoline and motor vehicles). Diesel engine has many properties similar to fossil fuels, but cleaner and cleaner; produced from abundant and renewable materials such as sugar, starch, animal and vegetable fats and oils. The paper presents the heating methods for the use of high-viscosity fuels for diesel engines.

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35

Тарасов, Валерий, Valery Tarasov, Анатолий Соболенко y Anatoly Sobolenko. "Impact of performance properties of regenerated engine oil on marine diesel wear when it runs on different grades of fuel". Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2019, n.º 4 (15 de noviembre de 2019): 71–81. http://dx.doi.org/10.24143/2073-1574-2019-4-71-81.

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The article focuses on studying the operational properties of regenerated engine oils in terms of the impact on the wear of friction units of the trunk diesel engine when it works on the fuel of different grades. There have been built generalized models of marine diesel parts wear on the basis of experimental studies. Diesel 2Ч10,5/13 was used for experiments. Wear was determined by the method of artificial bases and by weighting. Four groups of the main indicators of fuels used on ships have been considered (depending on the quality indicator). The first group includes distillate fuels and low-viscosity marine fuel which is close in its characteristics to foreign fuels. The second group includes motor fuel, naval fuel oil and export fuels (medium viscosity fuels). The third group presents high-viscosity marine fuel; the fourth group - fuels made from the remains of oil refining. The description of the generalized model of details wear of the tested diesel engine was carried out by a polynomial of the second order. To obtain the model, a non-position plan was chosen for three test variables: concentration of additives in oil, a fuel quality factor and a level of diesel forcing. The superposition of the hypersurfaces of the response of wear functions of the internal combustion engine with diesel boosting factors at zero, lower, and upper levels with visualizing the effect on engine wear parameters depending on the additives concentration and quality of the fuel used in testing regenerated engine oil has been illustrated. Verification of the model's adequacy has proved that the model is adequate for machines with average effective pressure and a wide range of fuel grades. There has been given the possibility of using the obtained model to estimate the wear value at different values of parametric factors

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Duan, Zheng, Yajie Chen, Haibo Gao y Linhao Liao. "Analysis of Key Technologies for New Green Marine Propulsion Systems". E3S Web of Conferences 194 (2020): 02008. http://dx.doi.org/10.1051/e3sconf/202019402008.

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The new green Marine propulsion system, as a new generation of marine propulsion, has advantages of strong mobility, low fuel consumption, low noise, safety and comfort. Three green propulsion solutions for different ship types are proposed, including pure electric propulsion system, compound energy storage electric propulsion system and diesel-electric hybrid propulsion system. The structure features and performance advantages are introduced and the key technologies such as new energy storage, DC network and shaft generator/motor are discussed. The related research achievements and typical project cases are also introduced.

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Кулік В.І., В. І. "ПІДВИЩЕННЯ ЦЕТАНОВОГО ЧИСЛА ДИЗЕЛЬНОГО ПАЛИВА ПРИ ДОМІШКАХ НАНОПОРОШКА ОКСИДА АЛЮМІНІЯ (AL2O3)". Ship power plants 39, n.º 1 (5 de mayo de 2019): 69–77. http://dx.doi.org/10.31653/smf39.2019.69-77.

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The main trends in modern diesel engines are the increase in fuel efficiency and operational reliability of engines, as well as their environmental safety, mainly related to stringent emission requirements for exhaust gases. The necessity of the world navy fleet in the non-existent amount of fuel is clarified, the forecast is made, which implies further increase of its consumption. The total capacity of marine engines in the world, and in the longterm perspective, until 2050, is determined. The number of emissions of harmful substances into the atmosphere by the ships of the world fleet is shown, international norms are regulated, which strictly regulate the number of these emissions, as well as the dynamics of the strengthening of norms for the present and for the future. Certain types of technological emissions and the composition of harmful substances in the exhaust gases of marine engines have been identified. They make up 0.1 - 1.0% of total emissions, are in gaseous state and include carbon monoxide oxides, NOx nitrogen, SOx sulfur, and hydrocarbon CrNy. Emissions of nitrogen oxides (NOx) with off-gas from marine diesel engines account for about 14% of global NOx emissions from the combustion of all types of fossil hydrocarbon fuels The analysis of methods of their purification is carried out. An analysis of recent publications has been carried out It is known that the quality of diesel fuel, its physical and chemical properties, affect the fuel economy and the content of harmful substances in the exhaust gases of the engine. The most common way to ensure the required properties of diesel fuel is the introduction of multifunctional impurities. The groups of impurities to diesel fuel are given. The influence of nano-metal impurity on Al2O3 fuel is analyzed. The analysis of diesel fuel with an admixture of aluminum oxide nanopowders (Al2O3) gamma-modification. It has been established that the additive to diesel fuel based on AL2O3 nanopowders is promising. It is expedient to carry out a complex of motor tests for introduction of an additive on the sea and river fleet

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38

Arif Budiyanto, Muhammad, Mohammad Zyan Beckham, Gerry Liston Putra y Achmad Riadi. "Study on Design of Hybrid Diesel-Electric Motor Propulsion System for Eco-Tourism Boat". Journal of Physics: Conference Series 2739, n.º 1 (1 de abril de 2024): 012053. http://dx.doi.org/10.1088/1742-6596/2739/1/012053.

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Abstract Indonesia as a maritime country has extraordinary marine tourism potential. On the other hand, the development of eco-tourism boats is still limited. The objective of this study is to investigate the design of diesel-electric hybrid propulsion system for a tourist boat with capacity of 10 passengers. The design of eco-tourism boats considers a trimaran hull using hybrid diesel-electric motor propulsion with an overall length of 12 meters and a block coefficient of 0.4. The performance of the proposed eco-tourism boat was investigated by a simulation model to obtain the required power and stability criteria. The simulation result shows the proposed eco-tourism boat can achieve the desired service speed of 13 knots with the required power is 390 kW.

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39

Kuropyatnyk, Oleksiy Andriiovych y Sergii Victorovych Sagin. "Exhaust Gas Recirculation as a Major Technique Designed to Reduce NOх Emissions from Marine Diesel Engines". Naše more 66, n.º 1 (febrero de 2019): 1–9. http://dx.doi.org/10.17818/nm/2019/1.1.

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40

Quang Vinh, Nguyen, Bul Hong Duong y Le Van Vang. "Modelling and Experimental Validation of a VNT Turbocharger for Improving Performances of a Marine Diesel Generator Engine". Naše more 67, n.º 2 (mayo de 2020): 96–102. http://dx.doi.org/10.17818/nm/2020/2.2.

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41

Shi, Weifeng y Tianhao Tang. "The Development and Application of a Marine Power System Simulator for Marine Engineer Training". Marine Technology and SNAME News 42, n.º 02 (1 de abril de 2005): 80–87. http://dx.doi.org/10.5957/mt1.2005.42.2.80.

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For marine engineer training, marine power system analysis and fault diagnoses, a marine power system simulator (MPSS) is proposed here. It has been developed by applying system simulation techniques. The main techniques employed were marine power system modeling, microcomputer control, and local area network communication. Some functions and typical fault simulations produced with the MPSS are introduced. These operations are particularly useful for marine engineer training. A marine power system model is built by applying the power system dynamic stability theory. The power system model is the most important element in the simulator. The system model is made of a diesel engine generator, induction motor, power network, and so on. Many simulation results were obtained, such as starting the lubricating oil pump and a power network three-phase ground fault. Because the system offers online control, local area network communication, and human-machine interface of information, this MPSS is used extensively in marine engineer training where the standard is professional skill in marine electrical technology. The system has been used to meet the standards of the STCW78/95 international convention in many marine companies and training centers in China with good results.

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42

Nikolaidis, Efstratios, Anastassios N. Perakis y Michael G. Parsons. "Probabilistic Torsional Vibration Analysis of a Motor Ship Propulsion Shafting System: The Input-Output Problem". Journal of Ship Research 31, n.º 01 (1 de marzo de 1987): 41–52. http://dx.doi.org/10.5957/jsr.1987.31.1.41.

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A probabilistic approach to the torsional vibration analysis of a marine diesel engine propulsion shafting system is developed. The diesel engine and propeller torsional excitation are modeled probabilistically. The statistical properties of the resulting torsional vibratory shear stress in each element of the shafting system are determined by solving the corresponding input-output problem. The shafting system is considered as a multi-input linear system with the propeller and the cylinder torsional excitation as inputs and the torsional vibratory stress as the output. Under the assumption that the nonresonant torsional vibratory stresses are negligible compared with those in resonance, the input-output problem reduces to determining the statistical properties of the output of a multi-input, linear, time-invariant system driven by Gaussian amplitude modulated (AM) processes with equal carrier frequencies. The problem is solved in its general form by deriving an expression relating the double Fourier transform of the output autocorrelation function with the double Fourier transform of the input autocorrelation and cross-correlation functions. The probabilistic approach is applied to calculate the stress statistics in each shafting element of existing low-speed and medium-speed diesel engine propulsion shafting systems.

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43

Yusifova, A. R. "Development of biostable lubricant composition of М-12ВБ motor oil for marine diesel engines". Azerbaijan Oil Industry, n.º 03 (15 de marzo de 2022): 49–53. http://dx.doi.org/10.37474/0365-8554/2022-03-49-53.

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The paper is dedicated to the development of biostable lubricant composition of М-12ВБ motor oil on domestic raw, foreign additives, additive packages, as well as multi-function additives of AKI series obtained as a result of condensation of calcium salts with alkylphenol, formaldehyde with vari-ous amines. During development of up-to-date lubrication compositions the additives of polymethacry-late of Viscoplex-8-450; -4-550; 2-670; 1-810 seies of German Evonik have been used and the results of studies their mechanical and chemical destruction presented. For the specification of biological stability of new lubrication compositions a-aril-b-nitroeten, a-furil-b-nitroeten and their hallogen derivatives have been used. It was defined that adding biocides do not negatively effect the changes of antioxidizing, anticorrosion, antiwear, lubricating and other significant operation properties and characteristics of the oils. Biostable composition of M-12BБ motor oil for marine and stationary diesels meeting all GOST requirements has been developed.

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44

Tarasov, Maxim Igorevich y Gennadiy Petrovich Kicha. "Kinetics of motor oil aging in marine diesel engines under continuous and periodic refill to compensate loss". Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2023, n.º 1 (28 de febrero de 2023): 7–14. http://dx.doi.org/10.24143/2073-1574-2023-1-7-14.

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The article considers the balance of the engine oil aging components in the diesel engine lubrication system with the refinement of oil composition caused by the oil product loss. The motor oil aging process has been identified under continuous and periodic oil refill in order to replenish the lubrication system with fresh oil which would compensate the burnt off oil products. There were derived and solved the differential equations of the oil product balance for such aspects of aging as contamination by insoluble impurities and multifunctional additives impact, which helped understand the general regularities and kinetics of the studied process. Novelty of the approach to theoretical description of the process consisted in the fact of filtering the insoluble and colloidal components of mechanical impurities and additives by the purification and burnout means. Cyclic picture of aging allows to analyze the state of the oil aging before and after refill with its periodic refreshment. The dependence is transformed and presented in a form where it is possible to determine the state of the oil at each aging cycle, without examining the intermediate concentrations of impurities and additives. The advantage of the obtained kinetic integral expressions for oil aging is the ability to determine the conditions for a long-term or permanent mode of its use in the lubrication system of a diesel engine. There are given the formulas by which the intensity of filtration and the concentration of additives in fresh oil or the time of their impact are calculated at a given oil loss and provide a pre-rejection mode of using circulating luboil in a diesel engine.

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45

Lan, Hai, Xin Zhao y Jie Meng. "Research of Integrated Power Propulsion System Simulation Based on PSCAD". Advanced Materials Research 875-877 (febrero de 2014): 1939–43. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.1939.

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Modeling and simulation of generator, frequency converter, motor, propeller of integrated power system in PSCAD environment respectively, finally form a complete system, which contains the diesel engine and speed regulation system, generator and excitation system, motor and vector control system. Establish the propeller model as motor load by Fortran language. The motor load constantly changing, traditional PI controller parameters are not easily adjusted in real time, SNAPID controller based on the error changes in the changing, complete SNAPID controller in MATLAB environment and call MATLAB continually, the control effect of speed is improved in the process of marine propulsion. Finally simulate typical working condition of system, the simulation results show that propeller shaft torque is smaller when grading operating, the influence of electric propulsion system is smaller and conducive to maintaining the stability of the system.

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46

Hristov, Hristo, Ivaylo Bakalov, Bogdan Shopov y Dobromir Yovkov. "Modeling Of The Dependence Of The Produced Amount Of Hydrogen Gas (Y) On The Amperage Of Cell (X) Of A Marine Diesel Engine Skl 3Nvd24". Pedagogika-Pedagogy 93, n.º 6s (31 de agosto de 2021): 273–78. http://dx.doi.org/10.53656/ped21-6s.24mod.

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The introduction of new fuels in the field of maritime transport is considered a serious challenge due to the harsh environmental conditions in which the motor ship must operate. Modern marine engines are designed to improve the overall efficiency of the marine system so any attempt to exploit a new fuel must be accompanied by scientific research and experimental data to provide engineers and ship operators with sufficient information on its efficiency and safety.

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47

Saponaro, Gianmarco, Michele Stefanizzi, Davide D’Amato, Emanuele Franchini, Francesco Fornarelli, Marco Torresi y Sergio Mario Camporeale. "Modeling and design optimization of a hybrid power generator for full-electric naval propulsion". Journal of Physics: Conference Series 2385, n.º 1 (1 de diciembre de 2022): 012087. http://dx.doi.org/10.1088/1742-6596/2385/1/012087.

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Abstract The purpose of this work is to build a model of diesel engine useful for studying new hybrid solutions for power generation. This kind of study is of significant interest particularly for the marine sector, due to recent limitations on fuel consumption and constraints imposed on the minimum powertrain efficiency. In this paper a variable-speed diesel generator model is presented. The model simulates both the dynamic behavior of the engine and the fuel consumption during the operating cycle. This model was developed using experimental results of bench tests conducted on the VL1716C2-MLL engine by Isotta Fraschini Motori (IFM) SpA. Diesel engine dynamics is based on the formulation found in the technical literature on mean value models and then adjusted through experimental data. Special attention was paid to developing the procedure to find the minimum specific fuel consumption for a given load. Initially, the presented resutls concern the correct response of the model under different load conditions. Then, the improvement in specific fuel consumption (obtained by adjusting the engine speed according to the load), in comparison with fixed speed operation, is shown.

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48

Fang, Xi Feng, Sheng Wen Zhang, Chan Yuan Gong y T. X. Lan. "Study on Parameter Optimization about NC Cutting of Marine Ship Diesel Engine and Cutting Database System". Key Engineering Materials 392-394 (octubre de 2008): 821–25. http://dx.doi.org/10.4028/www.scientific.net/kem.392-394.821.

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In the manufacturing of diesel engine, cutting machining is the main processing method. In order to improve efficiency and increase benefit of machining, the cutting database and parameter optimization system is built for the five key parts of marine ship diesel engine, which can provide optimal and rational cutting parameters. Microsoft Visual Basic and Microsoft SQL Server 2000 are used as the database management system, combining the modeling function of Deform 5.03 software. The logical and physical models are designed, and the functions of basic information management and query are realized. It can commend reasonable cutting parameters according to machining condition input. The Weilenmann algorithm method is adopted to calculate the cutting force and motor power, and user can be convenient to judge whether the parameter input is safe and reasonable. The objective function and restrictive conditions are set up by using the simplex method and linear programming, and the optimization function of cutting parameters is realized. A developed prototype system and an example have verified some presented techniques and the research results are the basis of the future development.

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Yang, Su-Young, Tae-Hun Kim, Yeon-Won Lee y Deog-Hee Doh. "Numerical Analysis on Flow Characteristics of Air Starting Motor for Marine Medium-Speed Diesel Engine". Journal of the Korean Society of Marine Engineering 33, n.º 4 (31 de mayo de 2009): 545–52. http://dx.doi.org/10.5916/jkosme.2009.33.4.545.

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Mitusova, T. N., E. I. Shiryakina, M. A. Ershov, G. A. Kozyreva, M. M. Lobashova, D. A. Potanin, E. A. Aleksandrova y M. V. Kalinina. "Changes in the GOST standards for motor and aviation gasoline, diesel, marine and boiler fuels". World of OIL Products the Oil Companies Bulletin 02, n.º 02 (2019): 36–39. http://dx.doi.org/10.32758/2071-5951-2019-0-02-36-39.

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