Dimensioning of electric propulsion motors for war ships using finite element method angelos p. Much of the time is spent at lower speeds causing the diesel propulsion engines not to operate at optimal power level. Nikola tesla was an early proponent of electric propulsion for ships. Reference herein to any specific commercial product, process, or service.
A diagnostic of diesel electric propulsion for ships. The diesels provide reliable redundancy and an efficient source of electricity when in port, at anchor, or drifting. Benefits for the environment the main propulsion and thruster on this bulk carrier, with a 499 gross tonnage, utilize variable speed electric propulsion, which saves energy and is environmentalfriendly. Fully electric propulsion on a passenger ship becomes possible posted on january 4, 2017 january 4, 2017 by news hound the norwegian explorer cruise line, hurtigruten, is to build its two new expedition ships using a new and environmentally sustainable hybrid, electric propulsion technology from. Leonardo drs provides integrated electric full electric or hybrid electric drive gearmounted or shaftmounted ship propulsion solutions. Dieselelectric marine propulsion marine diesel engine. Diesel electric propulsion systems are used on ships with special operational requirements. The choice of diesel electrical system as the power source for a propulsion system of a vessel has nothing to do with hydrodynamic efficiency. More than just electric drive, the ips enables a ships electrical loads, such as pumps and lighting, to be powered from the same electrical source as the propulsion system. The most reliable and low noise design is the direct drive. Pestana head of ship design, abb marine, billingstad, norway this abstract.
Another attractive alternative is combined gas and steam turbine cogas drive. Allelectric ships will unlock this power by applying an integrated power system ips that provides electric power to the entire ship. By using an electric propulsion system one type of. Ship manoeuvrability is improved by high torque at low speed navigation. Electric propulsion systems, electric drive systems. Dieselelectric propulsion systems are used on ships with special operational requirements. Ges power conversion business is a leading specialist in power and propulsion system packages including prime movers, generators, electrical distribution, fixed or variable speed drives and motors for propulsion thrusters, and large electrical systems at both medium and low voltages.
Naval dc solar electric propulsion systems for the. Find materials for this course in the pages linked along the. Jul 06, 2006 improvements have also been reportedly made to conventional propulsion systems, such as the integrated power system, which produces electrical power for both the propulsion system and ship s support systems. This article covers the two main types of electrical drive systems currently in use frequency controlled a. Dieselelectric drive takes less space than the equivalent directdrive twostroke engine allowing the aft section to be slimmer and giving better flow over the propeller. First, this paper classifies ship propulsion topologies into mechanical, electrical and.
Most ac propulsion plants aboard ships built since 1940 have utilized synchronous type ac propulsion motors. Direct propulsion system is an invariable choice for low speed diesel engines and has a very basic arrangement. Ieee proceedings 2015 1 the marine vessels electrical power. In an elec tric powered ship propulsion system, the most critical elements will be the electric ac drive technology, not so much the prime movers nor the gear and. Dieselelectric propulsion plants guideline 20120731. Shaft in line propulsion justifying the name, the shaft from prime mover is used to turn the propeller by either with the help of high speed motor or by reduction gear or directly by a slow speed motor.
Pdf the main objective of this paper is to present an analysis on diesel electric. Dimensioning of electric propulsion motors for warships. Past and present use of electric ships in the energy industry. Among all prospective alternate power sources for ships, electrical propulsion system is one of the most promising alternatives in tod ys tim. Power accounting for ship electric propulsion valery vodovozov and tonu lehtla tallinn university of technology estonia valery. The functionality of the drive control system depends on the plant configuration and the operational requirements. By using an electric propulsion system one type of motor covers the whole range. C motors and gives you a clear picture on the layout of the diesel electric marine propulsion systems. For the purpose of analysis, the propulsion system has been separated. 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.
Our motor and drive systems provide advantages in flexibility, modularity and commonality. These systems are based on the principle of speed controlled ac motors driving the propeller directly or by gearing. The ideal simplicity of the induction motor, its perfect reversibility and other unique qualities render it eminently suitable for ship propulsion, and ever since i brought my system of power. Since then, the shipping industry has started to introduce electric propulsion as a solution to improve fuel efficiency and reduce emission. In passenger ships, one or more gas turbines are used for fast cruising. Propulsion of liquefied natural gas lng ships is undergoing significant change. The electric propulsion system consists of a prime mover which may be one of two types. The conventional propulsion system of ships is efficient but requires high operating costs and increases marine pollution. 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. To prepare for todays topic, more specifically for the topic. Rms qm queen mary was a steamer cruise of 29 pax, built in 1936 and retired in 1967. A diesel electric system is an integrated electric propulsion system in which no gas turbines are used and all of the engines are diesel. Next in gard news nonmariners guide to ship construction and operation is a basic guide to marine propulsion systems, which produce the thrust to push a ship across water.
Voltage stability in an electric propulsion system for ships. The electric propulsion system used on merchant ships is categorized into twotypes depending upon type of prime mover attached to it. Design and control of hybrid power and propulsion systems for. Electricity shifts the currents of ship propulsion. Review of allelectric and hybridelectric propulsion technology for small vessels march 2015 1 1. Future trends of electrical propulsion and implications to. At the start of construction, a nassco statement noted the innovative designs of the new 24knot vessels would make them the first ships in the u. The system is water cooled and has incredibly compact dimensions, easily fitting onto standard engine beds. Kerrebrock and subsequently adapted by manuel martinezsanchez. Future trends of electrical propulsion and implications to ship design h. Our innovative dieselelectric propulsion systems provide up to 28 mw of power for a wide variety of vessels with special requirements. The traditional steam plant is losing favor because of its low cycle efficiency. Diesel electric drive takes less space than the equivalent directdrive twostroke engine allowing the aft section to be slimmer and giving better flow over the propeller. Direct propulsion system is the most commonly used system on ships.
In this paper, we use a simulation model of a hybrid propulsion system to investigate two parallel control strategies for diesel mechanical and electrical propulsion on multifunction ships. Design and system integration issues in modern ships of large size, the main propulsion system, consisting of either. Oct 08, 20 electrical plants and electric propulsion on ships giuffrida, marco on. Dec 19, 2015 1 overview ofthe conventional power plants in marine system. Background and issues for congress summary the navy in january 2000 selected electricdrive propulsion technology for use on its planned nextgeneration dd21 landattack destroyer and is considering it for use on other kinds of navy ships as well. Dimensioning of electric propulsion motors for warships using finite element method angelos p. Manager, ecology engineering group, engineering division, ihi marine united inc.
Request pdf electric motors and drives for modern ship thruster propulsion. Ieee proceedings 2015 1 the marine vessels electrical. Pdf a diagnostic of dieselelectric propulsion for ships. A methodology to select the electric propulsion system.
The three largest categories of ships are container ships, bulk carriers for bulk goods such as grain, coal, ores, etc. Electric propulsion requirements and mission analysis. Propulsion units used in ship electric propulsion systems. By this definition, propulsion systems are many and varied, starting from our muscles using which we propel ourselves in walking, running, swimming, and so on. He wrote in the new york herald, in february 25, 1917.
Dieselelectric propulsion systems are used on ships. A traction kite propulsion system for commercial ships is. The electrification of warship propulsion system is a very attractive solution, as it. Ships being developed in the near term and long term will have a variety of newly designed propulsion systems depending on their size, mission, and ship characteristics. Future trends in electric propulsion systems for commercial. Ddg, which is under construction, is propelled by four advanced induction motors aim, two per shaft. Power for ac propulsion motor is supplied obviously by an alternator.
Electric and hybrid electric ship propulsion systems. Developed through cfd testing and analysis, the nozzle is a major advance on the profile used in conventional nozzle propeller installations. Mediumspeed dieselelectric and slowspeed dieselmechanical drive ships are in service, and more are being built. Gao propulsion systems for navy ships and submarines. Although electric propulsion for marine vessels has been used for over 100 years, the modern age of electric propulsion for ships is considered as starting from 1988 with the retrofit of the queen elizabeth ii to use a dieselelectric integrated propulsion system. A dieselelectric system is an integrated electric propulsion system in which no gas turbines are used and all of the engines are diesel. Marine full electric propulsion power system open script this example shows a representative marine halfship electrical power system with base load, hotel load, bow thrusters and electric propulsion. The latter powers deep space 1, nasa s successful ion propulsion vehicle, which now cruises the solar system 7 million miles 220 million kilometers from earth, testing inspace hardware and electric propulsion capabilities. This section includes select lecture notes for the course excluding lessons on aircraft propulsion and jet engine rotordynamics. Electric motors and drives for modern ship thruster. This paper will, in particular, attempt to explain some of the most elementary terms used regarding ship types, ships dimensions and hull forms and clarify some of the parameters pertain ing to hull resistance, propeller condi tions and the diesel engines load diagram.
Naval dc solar electric propulsion systems for the marine. Nov 20, 2007 tote had decided to build two new ships to replace its fleet of three aging steam propulsion ships used on the tacoma, wash. Arrangement of equipment can be designed freely allowing for a wide cargo space. There are many advantages and some disadvantages of this system. Dieselelectric propulsion pushes ahead professional. Because of its high performance capability, high comfort class rating and small amount of components inside the hull, it is a perfect solution for passenger vessels on the power level of 1020 mw per unit. Introduction of the high current scr in the late 1960s, the acdc electric propulsion drive has become quite popular. Finally, in conclusion, reason of superiority of electrical systems on other types for use in ships propulsion systems has been expressed.
Msfc advanced propulsion technology and development. History and recent advancements of electric propulsion and. Naval dcs propulsion systems are always matched to the project and offer the highest efficiency, while offering unparalleled power output at low weight. Over the last 10 years the electrical propulsion fleet grew three times faster than the world fleet. Introduction propulsion systems are those that are required to propel the vehicles to which they are attached. Todays inspace propulsion challenges are focused on chemical propulsion, while.
While paddles and sails are still used on some smaller boats, most modern ships are propelled by mechanical systems consisting of an electric motor or engine turning a propeller, or less frequently, in pumpjets, an impeller. Fully electric propulsion on a passenger ship becomes possible. Renewed interest in dieselelectric marine propulsion. Electric drive poses issues for congress concerning its costs, benefits and risks, and how the. Electric propulsion systems are designed according to. Ieee proceedings 2015 3 a passenger and cargo vessel ss columbia 18801907, owned by the oregon railroad and navigation company and later the union paci. The concept of electric propulsion is over 100 years old with batterypowered vessels recorded in russia and germany around 1870. Propulsion system conceptual design concepts for system interaction exploration. In a typical anchorhandler propulsion system it will reduce fuel consumption. 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. Tote had decided to build two new ships to replace its fleet of three aging steampropulsion ships used on the tacoma, wash. For example our 80kw system for faster vessels weighs in at just 36kg. Electric marine propulsion systems ge power conversion.
Onboard the visbyclass there is two different types of engines for low speed and high speed of which none are currently electrical. Marine electric propulsion marine propulsion is the mechanism or system used to generate thrust to move a ship or boat across water. The installation of the light system aboard ss columbia. Energy saving technology of the dieselelectric propulsion. Marine propulsion is the mechanism or system used to generate thrust to move a ship or boat across water. In 1893, one of the first electric boats electricity carried passengers on the river thames in england. Vessels with this type of propulsion system include fishing trawlers and factory vessels, research vessels, icebreakers, offshore supply vessels, conventionally moored and dynamically positioned drill vessels, and semisubmersibles. Electric propulsion with diesels used as prime movers. Jan 04, 2017 fully electric propulsion on a passenger ship becomes possible posted on january 4, 2017 january 4, 2017 by news hound the norwegian explorer cruise line, hurtigruten, is to build its two new expedition ships using a new and environmentally sustainable hybrid, electric propulsion technology from rollsroyce. Electrical plants and electric propulsion on ships. It consists of a propeller, which is connected to the main engine with the help of the shaft.
Electric propulsion requirements and mission analysis under nasas inspace propulsion technology project. Ships being developed in the near term and long term will have a variety of newly designed propulsion systems depending on their size. Abb azipod propulsion system is widely used in varius passenger ships. Most modern ships are propelled by mechanical systems consisting of a motor or engine turning a propeller. United states government accountability office washington. Electric propulsion system for ships the marine express. The need for propulsion motors of this type has since gone away due to the advent of solid state control devices. Developments in electric and green marine ships mdpi. Other devices, such as magnetoplasmadynamic thrusters, vasimr and pulsed induction thrusters, may offer future primary.
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