However, with developments in electric propulsion technology this now offers many advantages, such as high redundancy, flexibility in equipment layout, energy savings and reduced exhaust gas emissions. Our portfolio spans from fleets of solar electric and hybrid catamarans to solar electric race and speed boats. Electric propulsion with gas turbine or diesel engine driven power generation is used in hundreds of ships of various types and in a large variety. Dieselelectric propulsion systems are used on ships with special requirements. Diesel electric propulsion systems are used on ships with special operational requirements. Electric propulsion systems for ships topics yoshifumi ajioka kiyoshi ohno increasing use of electric propulsion systems on ships as is the case with general automobiles that are driven on land, the main type of engine used on ships is the internal combustion engine motors such as diesel engines and gas turbines. Dieselelectric propulsion pushes ahead professional mariner.
See the first prototype version of our 330hp drive. The fuel efficiency while cruising is lower by the efficiencies of the generator, vfd and motor mu. Integrated electric propulsion iep or full electric propulsion fep or integrated full electric propulsion ifep is an arrangement of marine propulsion systems such that gas turbines or diesel generators or both generate threephase electricity which is then used to power electric motors turning either propellers or waterjet impellors. The diesel electric option proved slightly more expensive to procure, but significantly cheaper in terms of tlc. The agency sees electric drive propulsion including battery electric, hybrid electric, and fuel cell hybrid as a path to reaching that goal. For the last 12 years, doe has been evaluating alternative fuel. Maritime electrical installations and diesel electric propulsion.
Recent renewed interest in dieselelectric marine propulsion creates a need for more understanding of how the systems work and how they are laid out. In combination with an electric generator, the system is known as genset generator set. Reference herein to any specific commercial product, process, or service. Functionally, the propulsion drive can be divided into following parts. Simulations show that diesel electric propulsion can be the most fuel efficient solution for lng carriers under realistic operating conditions. The most reliable and low noise design is the direct drive. This document, and more, is available for download from.
Generator mode ptomode the main engine provides not only the power for ship propulsion, it also supplies the electric power needed for the ships consumers. It combines some great mechanical technology, including a huge, 12cylinder, twostroke diesel engine, with some heavy duty electric motors and generators, throwing in a little bit of computer technology for good measure. As is the case with general automobiles that are driven on land, the main type of engine used on ships is the internal combustion engine motors such as diesel. Diesel engines, propulsion systems, generator sets, automation. Challenges and experiences with electric propulsion transit. Mathematical modelling of dieselelectric propulsion systems for marine vessels article pdf available in mathematical and computer modelling of dynamical systems 007 september 2001 with. New orders are broken into diesel electric, mechanical drive and auxiliary generating set orders. The electric propulsion system consists of a prime mover which may be one of two types. Our innovative dieselelectric propulsion systems provide up to 28 mw of power for a wide variety of vessels with special requirements. Pdf dieselelectric drives dieselelectric propulsion. Maritime electrical installations and diesel electric.
As compared to diesel mechanical driven ships, in this system maintenance and spare demand is reduced. Hundreds of diesel electric packages in operation globally regular integration meetings begin at vessel concept and continue through commissioning customized packages for constant and variable speed propulsion feature cummins marine auxiliary engines matched to customers choice of alternator, including cum. Fuel types include diesel fuel, heavy fuel and natural gas. Electric propulsion systems are designed according to the power station. Dieselelectric propulsion page 2 engines for dieselelectric propulsion any typeapproved diesel engine for inland ships nrmm stage v category iwpiwa or nre and euro vi truck engines after appropriate marinization can be used.
Rms qm queen mary was a steamer cruise of 29 pax, built in. Diesel electric propulsion 5200 ekw marine engine performance c28016 diesel engine technical data the rating is approved with a time before major overhaul tbo of 40000 based on the provided load profile. Review of allelectric and hybridelectric propulsion technology for small vessels march 2015 1 1. Minimum centreline distance for twin engine installation. As an example of changing times in marine propulsion, consider the two cruisers. With mechanical propulsion, if a ship loses one of two diesel engines, it loses fifty percent of its propulsion power. Dieselelectric propulsion plants guideline 20120731. Electric propulsion the conversion in order to provide a concise discussion, we have simpli. Today, the primary source of propeller power is the diesel engine, and the power requirement and rate of revolu.
Electric propulsion systems for ships hitachi global. Developing a new methodology for evaluating diesel electric propulsion volume no 3 dec 2014 journal of marine engineering and technology 63 developing a new methodology for evaluating diesel electric propulsion introductionw orldwide concern about air quality, greenhouse gas emissions, and oil supplies has. Challenges and experiences with electric propulsion. This article covers the two main types of electrical drive systems currently in use frequency controlled a. Abc gensets are widely used around the world as main power gensets in tankers, dredgers, offshore vessels. Naval dc solar electric propulsion systems for the. Fossen2 abstract this article presents a mathematical model of a complete dieselelectric propulsion system, including components as diesel generators, distribution network, variable speed thrusterdrives.
Research vessels, ferries, tankers, and special purpose vessels have also taken advantage of increased flexibility and fuel efficiency with. Dieselelectric propulsion for new boskalis nclass vessels. Unlike chemical systems, electric propulsion requires very. As the propeller operates always on design pitch, in low speed sailing. I supply transformer ii propulsion motor iii frequency converter. Review of allelectric and hybridelectric propulsion. Unlike chemical systems, electric propulsion requires very little mass to accelerate a. Azipod propulsion is a gearless steerable propulsion system where the electric drive motor is in a submerged pod outside the ship hull. Developing a new methodology for evaluating diesel. All data found in the survey was provided by participating original equip ment manufacturers oems. The beauty of dieselelectric propulsion is the diesel engines are turned on only as they are needed, and if an engine is lost, the remaining dieselengine generators on the system can still provide power to both shaft lines.
This system consists of prime mover which are usually diesel driven turbine or steam driven. Electric propulsion systems, electric drive systems the concept of electric propulsion is over 100 years old with batterypowered vessels recorded in russia and germany around 1870. Mathematical modelling of dieselelectric propulsion systems. This document, and more, is available for download at martins marine engineering page. The beauty of diesel electric propulsion is the diesel engines are turned on only as they are needed, and if an engine is lost, the remaining diesel engine generators on the system can still provide power to both shaft lines. Electric propulsion is a natural choice for a lot of different ship types, and there are many reasons why. The transverse flux motor, currently being developed by rollsroyce, is a permanent magnet motor. Renewed interest in dieselelectric marine propulsion. A much wider application is now enjoyed thanks to the developments in ac drive technology, the central power station concept for propulsion and ship services, and increasing interest in low emissions and propulsion plant. Mathematical modelling of dieselelectric propulsion systems for marine vessels jan fredrik hansen1,3, alf ka. Like fta, doe is interested in fuelefficient transit bus technologies. This 270,000pound 122,470kg locomotive is designed to tow passengertrain cars. Download pdf 5 mb need help finding the perfect product or system. Dieselelectric propulsion pushes ahead professional.
Electric propulsion systems are designed according to. The marine propulsion order survey includes drivers beginning at 500 kw 0. C motors and gives you a clear picture on the layout of the diesel electric marine propulsion systems. Recent renewed interest in diesel electric marine propulsion creates a need for more understanding of how the systems work and how they are laid out. Maritime electrical installations and diesel electric propulsion trpa. The hybrid diesel locomotive is an incredible display of power and ingenuity. Since the additional components between the prime mover and the propeller shaft in a diesel electric propulsion. New orders are broken into dieselelectric, mechanical drive and auxiliary generating set orders. Royal boskalis westminster is a worldleading expert in the field of dredging and maritime services.
Flexibility and maximum efficiency optimally combined. Ship propulsion normally occurs with the help of a propeller, which is the term most widely used in english, although the word screw is sometimes seen, inter alia in combinations such as a twinscrew propulsion plant. Usually dieselelectric propulsion plants operate a fppropeller via a variable speed drive. Electric propulsion systems, electric drive systems. Developing a new methodology for evaluating dieselelectric. The company owns a versatile, modern fleet that consists of over 1,000 vessels and equipment. Electric propulsion ep is a class of space propulsion which makes use of electrical power to accelerate a propellant by different possible electrical andor magnetic means. Hence, the efficiency of a diesel electric system, from diesel engine shaft, to electric propulsion motor shaft, is normally between 0. Why dont semi trucks use diesel generators and electric. Mathematical modelling of dieselelectric propulsion. Nov 16, 2015 simulations show that diesel electric propulsion can be the most fuel efficient solution for lng carriers under realistic operating conditions. Pdf mathematical modelling of dieselelectric propulsion.
Lecture notes marine power and propulsion mechanical. The concept of electric propulsion is over 100 years old with batterypowered vessels recorded in russia and germany around 1870. A typical dieselelectric propulsion configuration for cruise vessels fig 3 consists of vsi type converter with 24pulse pwm technology, supply transformers and a synchronous slow speed electric motor of about 150 rpm. The efficiency depends on the loading of the system. Naval dc is your specialist with more than 12 years of experience for electric propulsion systems.
As a result of these features electrical propulsion systems are used particularly for cruise liners, ferries, cable and pipe layers, research vessels, icebreakers. These systems are based on the principle of speed controlled ac motors driving the propeller directly or by gearing. These systems are based on the principle of speed controlled ac or dc motors driving the propeller directly or by gearing. Azipod units can rotate 360 degrees to increase maneuverability and operating efficiency, with the proven ability to cut fuel consumption by up to 20 percent compared to traditional shaftline propulsion systems. New study on dual fuel diesel electric propulsion for lng. Ion and hall thrusters march 2008 the research described in this publication was carried out at the jet propulsion laboratory, california institute of technology, under a contract with the national aeronautics and space administration. Spacecraft powered by typical electric propulsion systems may eject propellant at up to 20 times the speed of conventional chemical systems, delivering a much higher specific impulse, or the amount of thrust obtained for the weight of fuel burned. Mathematical modelling of dieselelectric propulsion systems for marine vessels article pdf available in mathematical and computer modelling of dynamical systems 007. Naval dc solar electric propulsion systems for the marine. Electric propulsion a new era for bulk carriers case story vacon nxc in the past bulk carriers have utilized dieselmechanical propulsion. Electric propulsion system for ships the marine express.
In order to meet the challenge of high operating cost and marine pollution, ships propulsion system have changed from conventional power system to electric propulsion system in case of conventional propulsion system the propeller is driven by main engine which is running on heavy oil and in addition to it we were having another diesel driven alternator to take care of other. Dieselelectric propulsion systems are used on ships with special operational requirements. Electric propulsion presentation, guest lecturer prof. In 1893, one of the first electric boats electricity carried passengers on the river thames in england. Let one of our expert advisors point you in the right direction. The use of electrical power enhances the propulsive performances of the ep thrusters compared with conventional chemical thrusters. Nov 20, 2007 with mechanical propulsion, if a ship loses one of two diesel engines, it loses fifty percent of its propulsion power. Pdf a diagnostic of dieselelectric propulsion for ships. This is the equivalent of 17 trips around the world. Over the past ten years there have been significant improvements in the torque density of electric motors, moving from conventional motors to advanced induction motors and permanentmagnet propulsion motors see figure 8. In any of the system stated above will produce less pollution as compared to conventional system for propulsion. Lpdr and ao propulsion systems as a result of a tlc study comparing diesel mechanical and diesel electrical solutions for the lpdr, the option of diesel electric was chosen for hms albion and hms bulwark figure 1. Pdf the main objective of this paper is to present an analysis on diesel electric.
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