P a r t 6 c h a p t e r 2 c o n t e n t s rules for classification. The concept of electric propulsion is over 100 years old with batterypowered vessels recorded in russia and germany around 1870. Electric power generation and propulsion is a solution optimized for an environmentally aware era, and which answers shipyard and ship owners needs for fuel economy, higher flexibility both for. Among all the prospective alternate power sources, electrical propulsion system is. Electrical propulsion system in ships marine insight. Control and optimization of electric ship propulsion systems with hybrid energy storage by jun hou a dissertation submitted in partial ful llment. Control and optimization of electric ship propulsion systems with hybrid energy storage by jun hou a dissertation submitted in partial ful llment of the requirements for the degree of doctor of philosophy electrical. Since the early 20th century, icebreakers have employed the flexibility and easy control of dc motors to provide for ship operations that split ice with back and forth motion of the ship. Modern electric drive ships make use of integrated power plants with multiple ac generators supplying both propulsion and ship service power from the same bus. 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. Ship industry has witnessed a long way of research and development to accomplish lowcost and lesspollution ships. Control of electric propulsion the propulsion control system determines the power consumption of the whole ship network. Electric propulsion systems are often used on ships such as icebreakers or oceanographic research vessels that take advantage of the aforementioned operational benefits, or large passenger cruise ships and others that emphasize cost and silent operation. Our portfolio spans from fleets of solar electric and hybrid catamarans to solar electric race and speed.
Azipod propulsion is a gearless steerable propulsion system where the electric drive motor is in a submerged pod outside the ship hull. Paper open access related content type selection and. Electric propulsion system for ships the marine express. Naval dc solar electric propulsion systems for the marine. Dc motors are well proven as especially low vibration and low noise propulsion drives of research vessels and other special ships. Rms qm queen mary was a steamer cruise of 29 pax, built in 1936 and retired in 1967. Electric machines, power electronics, electric propulsion system for ships. These systems are based on the principle of speed controlled ac or dc motors driving the propeller directly or by gearing.
Our portfolio spans from fleets of solar electric and hybrid catamarans to solar electric race and speed boats. Ship propulsion is done by a system, which greatly affects the speed and power of a ship. Control and optimization of electric ship propulsion systems. New study on dual fuel diesel electric propulsion for lng. Review of all electric and hybrid electric propulsion technology for small vessels march 2015 1 1. Maritime electrical installations and diesel electric propulsion trpa. Abstractelectric propulsion of ships has experienced steady expansion for several decades. You hear about a new system idea, read an article, talk with others about options, do research but it is often hard to say where the speci. Edition october 2015 page 4 propulsion, power generation and auxiliary systems. Naval dc solar electric propulsion systems for the. Electric marine propulsion systems ge power conversion. A brief guideline how to engineer a dieselelectric propulsion. Electric drive propulsion poses a number of issues for congress concerning its potential costs, benefits and risks, and how the technology should be integrated into the dd21 program or other ship. In this type of propulsion, the electric motor is placed under the ship.
These systems are based on the principle of speed controlled ac motors driving the propeller directly or by gearing. Among all prospective alternate power sources for ships, electrical propulsion system is one of the most promising alternatives in tod ys tim. Reference herein to any specific commercial product, process, or service. Shaft in line propulsion justifying the name, the shaft from. The use of electrical power enhances the propulsive performances of the ep thrusters compared with conventional chemical thrusters. This article covers the two main types of electrical drive systems currently in use frequency controlled a. Among all prospective alternate power sources for ships, electrical propulsion.
The ships electrical network, engine control and automation. Review of allelectric and hybridelectric propulsion technology for small vessels march 2015 1 1. Abstract electric propulsion of ships has experienced steady expansion for several decades. For the purpose of analysis, the propulsion system has been separated into two units, namely the ship load and the motor drive. Our motor and drive systems provide advantages in flexibility, modularity and commonality. For us, the idea for implementing electric propulsion started when we read an article in. Diesel electric propulsion systems are used on ships with special requirements. Arrangement and operation the generator can be direct or alternating. Cruise vessels, ferries, dp drilling vessels, thruster assisted moored. In order to build a constructively advantageous ship propulsion.
Lecture notes marine power and propulsion mechanical. Flexibility and maximum efficiency optimally combined. Developments in electric and green marine ships mdpi. Throughout most of the twentieth century, electric propulsion was considered the technology of the future. Electric propulsion presentation, guest lecturer prof. As an example of changing times in marine propulsion, consider the two cruisers. Note that integrated power plants were not practical for many years because of the need to vary generator speed and output frequency in order to control propulsion. Due to their flexibility and versatility, diesel electric propulsion systems are highly adaptable to a wide range of applications. Basic principles of ship propulsion 7 indication of a ship s size displacement and deadweight when a ship in loaded condition floats at an arbitrary water line, its displacement is equal to the relevant mass of water displaced by the ship. The benefit of such an evaluation is that all of the propulsion options being considered by the u. Electric and hybrid electric ship propulsion systems. It is a modification of the combined diesel electric. 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.
Electric propulsion systems for ships hitachi global. Additional propulsion inuences are addressed and include conventional and nonconventional propulsors, magnetohydrodynamic propulsion, energysaving devices, hull design and coatings. Leonardo drs provides integrated electric full electric or hybrid electric drive gearmounted or shaftmounted ship propulsion solutions. Renewed interest in dieselelectric marine propulsion. Electric propulsion systems are designed according to the power station. Propulsion can represent about 80% of the total load and large and rapid load variations are possible. In those nonpassengercarrying vessels, propulsion was provided by only one azipod, where as cruise ships may have two for additional maneuverability and redundancy. Displacement is thus equal to the total weight, all told, of the relevant loaded ship. Evaluation and comparison of electric propulsion motors for. Control and optimization of electric ship propulsion systems with hybrid energy storage by jun hou a dissertation submitted in partial ful llment of the requirements for the degree of doctor of philosophy electrical engineering. Future ship powering options royal academy of engineering.
Basic principles of ship propulsion 7 indication of a ships size displacement and deadweight when a ship in loaded condition floats at an arbitrary water line, its displacement is equal to the relevant mass of water displaced by the ship. When considering demand then it is evident that reducing speed by 50% will reduce the ships power requirement to about 12. Systems in the university of michigan 2017 doctoral committee. As is the case with general automobiles that are driven on land, the main type of. 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. These propulsion systems are based on the principle of speed controlled dc or ac motors driving the propeller directly or via gears. 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. Evaluation and comparison of electric propulsion motors for submarines by joel p. Despite many diesel engines advantages, their primary disadvantage is emission of pollutants.
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. Evaluating the probability of power loss in ship electric. For us, the idea for implementing electric propulsion. At present, electric propulsion is applied mainly in following type of ships. Electric propulsion technologies generate thrust via electrical energy that may be derived either from a solar source, such as solar photovoltaic arrays, which convert solar radiation to electrical power, or. There are different types of propulsion system used on ships today. Electric propulsion is a natural choice for a lot of different ship types, and there are many reasons why. Electric propulsion our first 2,500 miles every decision starts somewhere. Hybrid electric propulsion system is a new type of dynamic form. 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. Electric propulsion systems, electric drive systems.
Pdf a diagnostic of dieselelectric propulsion for ships. 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. Electric propulsion systems for ships wide project. Pdf electric propulsion system of model ship shadman. Ships g n to nd p im mov assembly supplies power for the propulsion motor. Propulsion system types used on ships bright hub engineering. This section includes select lecture notes for the course excluding lessons on aircraft propulsion and jet engine rotordynamics.
C motors and gives you a clear picture on the layout of the diesel electric marine propulsion systems. Different solutions are available when using an electric motor for marine propulsion, one of which is called pod. 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. Dieselelectric propulsion plants guideline 20120731. Review of allelectric and hybridelectric propulsion. It is for this reason that the article describes the main types of propulsion systems a ship can use according to its capacity. Electric propulsion systems are designed according to. Naval dc is your specialist with more than 12 years of experience for electric propulsion systems. Basic principles of ship propulsion man energy solutions. The conventional propulsion system of ships is efficient but requires high operating costs and increases marine pollution.
Diesel electric propulsion systems are used on ships with special operational requirements. Paper open access related content type selection and design. The dc distribution system has been proposed, as a replacement for the present ac power distribution system for ships with electric propulsion this concept represents a new way of distributing energy for lowvoltage installations on ships. Nevertheless, batterybased propulsion would be bene. Azipod propulsion enhances the merits of electric propulsion in a number of ways. In the load model, variation of such factors like static and dynamic hull resistance and efficiency is explored while the supply. However, full ship battery propulsion requires further technical development and is likely to be con. Request pdf on may 1, 2019, wenfen zhang and others published evaluating the probability of power loss in ship electric propulsion systems based on bayesian belief networks find, read and cite. Diesel electric ship propulsion is a frequent shipowners choice nowadays, especially on passengerships.
A modern highoutput diesel engine requires effective scavenging and the turbocharger needs time to accelerate. This important new book explains the fundamentals of electric propulsion for spacecraft and describes in detail the physics and characteristics of the two major electric thrusters in use today, ion and h. A diagnostic of diesel electric propulsion for ships. 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. Displacement is thus equal to the total weight, all told, of the relevant loaded ship, nor. The purpose of this thesis is to evaluate some of the proposed motor designs for use in a submarine. Kriso technology for ship propulsion efficiency improvement and propeller noise reduction duration.
Permanent magnet, superconducting synchronous and hoinopolar motors are modeled using. Evaluation and comparison of electric propulsion motors. The propeller shaft of the ship is connected to large motors, which can be d. Our innovative dieselelectric propulsion systems provide up to 28 mw of power for a wide variety of vessels with special requirements. Propulsion for research and survey ships, as well as fishery supervision vessels wartsila has delivered the low noise dieselelectric propulsion systems for many research and survey vessels. Dnvglrushippt6ch2 propulsion, power generation and. Click download or read online button to get fundamentals of electric propulsion. This applies especially to vessels which have a large variation in power demand, for example. Diesel electric propulsion the market share of diesel electric propulsion systems in ships for a wide range of uses has substantially increased in recent years. Generator mode ptomode the main engine provides not only the power for ship propulsion, it also supplies the electric power needed for the ship. Pdf the main objective of this paper is to present an analysis on diesel electric. This is the equivalent of 17 trips around the world. All hybrid propulsion systems that exist at this moment combine a conventional propulsion system combustion engine, turbine by example with electrical propulsion azipods, azipulls by example. The most reliable and low noise design is the direct drive.
Hybrid propulsion is a type of propulsion in which 2 types of propulsion are combined to propel a ship or car or whatever is using the propulsion. The hybrid propulsion system has been widely used in passenger ships, marine work ship and public service and so on. Dieselelectric propulsion systems are used on ships with special requirements. Electric ship s propulsion system according to one of claims 1 to 9, in which an electric motor 4 belonging to the said electric ship s propulsion system is of polyphase design and slip rings for supplying the power semiconductors 27 with current are disposed upstream of the converter.
The invention relates to an electric ship propulsion having a propulsion nacelle 1, a rotatable hollow shaft 2 rotationally fixing the propulsion nacelle and a power supply. Fundamentals of electric propulsion download ebook pdf. Control and optimization of electric ship propulsion. The electric propulsion system used on merchant ships is categorized into twotypes depending upon type of prime mover attached to it.
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