Download or read book Electric Drive Propulsion for U S Navy Ships written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Navy in January 2000 selected electric-drive propulsion technology for use on its planned next-generation DD-21 land-attack destroyer and is considering it for use on other kinds of Navy ships as well. Electric drive poses issues for Congress concerning its costs, benefits and risks, and how the technology should be integrated into the DD-21 program or other ship-acquisition programs. Several foreign countries are developing or using electric drive in commercial or naval ships. The U.S. Navy's electric-drive development effort centers on the Integrated Power System (IPS) program. Several private-sector firms in the United States are now pursuing electric drive for the U.S. Navy market. Electric drive offers significant anticipated benefits for U.S. Navy ships in terms of reducing ship life-cycle cost, increasing ship stealthiness, payload, survivability, and power available for non-propulsion uses, and taking advantage of a strong electrical power technological and industrial base. Potential disadvantages include higher nearterm costs, increased technical risk, increased system complexity, and less efficiency in full-power operations. The current scarcity of precise and systematic estimates of the costs and benefits of electric drive makes it difficult for policymakers to assess the relative cost-effectiveness of differing technical approaches to achieving electric drive. Some of the risks involved in developing electric-drive technology have been mitigated by the successful development of electric-drive technology for commercial ships; estimates of the amount of remaining risk vary. The Navy has stated that developing common electric-drive components is feasible for several kinds of Navy ships and that pursuing electric drive technology in the form of a common family of components could have advantages for the Navy. The potential savings associated with a common system are difficult to estimate, but could be substantial. The concept of developing a common system or family of components poses issues for policymakers concerning the extent of commonality across electric-drive-equipped Navy ships and the use of competition in the development and procurement of electric-drive technology. Much of the debate over electric drive concerns electric motors. The five basic types in question - synchronous motors, induction motors, permanent magnet motors, superconducting synchronous motors, and superconducting homopolar motors - differ in terms of their technological maturity, power-density, and potential applicability to different Navy ship types. The Navy's decision to use electric drive on the DD-21 raises several potential issues concerning the acquisition strategy for the ship. Electric drive could be installed on Virginia (SSN-774) class submarines procured in FY2010, according to the Navy. Other candidates for electric drive include the Navy's planned TADC(X) auxiliary dry cargo ships, the Navy's planned joint command and control (JCC[X]) ships, the second through fifth LHA replacement ships, future aircraft carriers, and possibly the new cutters to be procured under the Coast Guard Deepwater project.
Download or read book Electric Drive Propulsion for U S Navy Ships written by Ronald O'Rourke and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides background information and discusses issues for Congress regarding the use of electric-drive propulsion technology (as opposed to traditional mechanical-drive technology) on U.S. Navy ships. As a result of technological developments over the last few years, electric-drive technology has matured to the point where the Navy has selected it for use on its planned next-generation DD-21 land-attack destroyer and is considering it for use on other kinds of Navy ships as well.
Download or read book Electric drive Propulsion for U S Navy Ships written by Ronald O'Rourke and published by . This book was released on 2000 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report provides background information and discusses issues for Congress rearding the use of electric-drive propulsion technology (as opposed to traditional mechanical-drive technology) on U.S. Navy Ships"--Introduction.
Download or read book Integration of Energy Efficient Propulsion Systems for Future U S Navy Vessels written by United States. Congress. House. Committee on Armed Services. Projection Forces Subcommittee and published by . This book was released on 2006 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electric Drive Propulsion for Ships written by John A. Culver and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electric drive ships are returning to the scene after a brief stay out of the maritime field. Now electric drive is returning in Roll-on Roll-off ships, Ferry Boats, Ocean Surveillance ships, Platform Supply Ships and Coast Guard Ice Breakers. Gas turbine generators have a potential of taking over prime movers for electric drive propulsion. Podded electric propulsions (PODS) are being used in some foreign ships. The U.S. Navy is looking at integrating electrical distribution systems with gas turbine generators to create an “all electric ship”. This book is an historical overview of electric drive propulsion in United States ships from 1900 to 2004. This includes ships of the U.S. Navy, Merchant Marine, Coast Guard and Oceanography. The summary is a list which gives the name or class of ship or submarine that have or had electric drive propulsion machinery installed. Each listing gives some details of a ship or class of ship, length, tonnage, and type of electric drive propulsion units and in some cases the shipbuilder and machinery manufacturer. Also, there are block diagrams showing the electric drive arrangement for each class of ship. The historical summary includes ships and submarine from 1900 to the massive build-up of ships with electic drive during World War II and into the slow down of the post war years. Naval Architects, Marine Engineers, shipbuilders, design agents, manufacturers of electric drive machinery, and personnel of the sea services will welcome this book to their library.
Download or read book Shipboard Propulsion Power Electronics and Ocean Energy written by Mukund R. Patel and published by CRC Press. This book was released on 2012-02-17 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shipboard Propulsion, Power Electronics, and Ocean Energy fills the need for a comprehensive book that covers modern shipboard propulsion and the power electronics and ocean energy technologies that drive it. With a breadth and depth not found in other books, it examines the power electronics systems for ship propulsion and for extracting ocean energy, which are mirror images of each other. Comprised of sixteen chapters, the book is divided into four parts: Power Electronics and Motor Drives explains basic power electronics converters and variable-frequency drives, cooling methods, and quality of power Electric Propulsion Technologies focuses on the electric propulsion of ships using recently developed permanent magnet and superconducting motors, as well as hybrid propulsion using fuel cell, photovoltaic, and wind power Renewable Ocean Energy Technologies explores renewable ocean energy from waves, marine currents, and offshore wind farms System Integration Aspects discusses two aspects—energy storage and system reliability—that are essential for any large-scale power system This timely book evolved from the author’s 30 years of work experience at General Electric, Lockheed Martin, and Westinghouse Electric and 15 years of teaching at the U.S. Merchant Marine Academy. As a textbook, it is ideal for an elective course at marine and naval academies with engineering programs. It is also a valuable reference for commercial and military shipbuilders, port operators, renewable ocean energy developers, classification societies, machinery and equipment manufacturers, researchers, and others interested in modern shipboard power and propulsion systems. The information provided herein does not necessarily represent the view of the U.S. Merchant Marine Academy or the U.S. Department of Transportation. This book is a companion to Shipboard Electrical Power Systems (CRC Press, 2011), by the same author.
Download or read book The Electric Propulsion of Ships written by Henry Metcalf Hobart and published by . This book was released on 1911 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of Electric Motors for Ship Propulsion written by Bobby A. Bassham and published by . This book was released on 2003-06-01 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: An evaluation was conducted of the various propulsion motors being considered for electric ship propulsion. The benefit of such an evaluation is that all of the propulsion options being considered by the U.S. Navy have been described in one document. The AC induction motor, AC synchronous motor, High Temperature Superconducting (HTS) motor and Superconducting DC Homopolar Motor (SDCHM) are examined. The properties, advantages, and disadvantages of each motor are discussed and compared. The power converters used to control large propulsion motors are also discussed. The Navy's IPS program is discussed and the results of concept testing are presented. Podded propulsion is introduced and the benefits are discussed. The final chapter presents the simulation results of a volts/Hertz controlled 30 MW induction motor. The evaluation revealed that the permanent magnet motor is the best propulsion motor when considering mature technology, power density, and acoustic performance. HTS motors offer significant volume reductions and improved acoustic performance as compared to conventional motors. This includes both AC and DC HTS motors. The main obstacle for the SDCHM remains the unavailability of high current capacity brushes.
Download or read book Diesel electric Direct Current Drive for Surface Ships written by United States. Navy Department. Bureau of Ships and published by . This book was released on 1945 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ADA048585 Final report to Office of Naval Research SRD 77 170 Conceptual study of permanent magnet machine ship propulsion systems written by R.A...[et al.] Marshall and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examines the feasibility of incorporating permanent magnet machines into an a-c electric propulsion system for U.S. Navy ships. This systm's concept is most attractive using conventional generators and permanent magnet motors. The cycloconverter subsystem is designed using advanced thyristors and can be either water or air cooled. The machine-cucloconverter, many-phase or parallel three-phase connection design offers a drive system with characteristics well matched to a ship propulsion system.
Download or read book The Electric Propulsion of Ships written by H. M. Hobart and published by Forgotten Books. This book was released on 2015-06-26 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Electric Propulsion of Ships Much attention is now being given to propositions relating to the electric propulsion of ships. A study of the circumstances reveals a remarkable accordance of means and requirements. The case may be briefly outlined as follow's: - The double transformation of energy in the form of work into energy in the form of electricity and again from electricity into work, may often, when the operations are on a large scale, be effected at an overall efficiency of 90 per cent, and even higher. In other words, at the cost of a loss of 10 per cent, in energy and of the initial and maintenance cost of the electrical machinery, engineers can interpose an electric drive between the prime mover and the machinery to be driven. The object of interposing an electric drive is to obtain advantages of flexibility which will permit of securing greater efficiency both in the prime mover and in the driven machinery, which, in the case of ship propulsion, is the propeller. Further great advantages relate to the superior means of control rendered available with electric drive. In the case of ship propulsion, the prime mover has, until recently, almost always been a reciprocating engine. But during the last ten years, many ships have been fitted with steam turbines. As applied to ship propulsion, the steam turbine has not met with any approach to the almost unqualified success which has attended its use on land. This is chiefly because, in applying the steam turbine to ship propulsion, it has been necessary to adopt speeds several times lower than have been customary with land turbines. This has been necessary owing to the well-known circumstance that the efficiency attainable with the screw propeller is lower (for a given power) the higher the speed of revolutions. It was a realization of this circumstance, more than any other consideration, which first led to serious propositions for the electrical driving of large ships. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Bureau of Ships Manaul written by United States. Navy Department. Bureau of Ships and published by . This book was released on with total page 1272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electric Boats and Ships written by Kevin Desmond and published by McFarland. This book was released on 2017-10-05 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electric propulsion for boats was developed in the early 19th century and--despite the advent of the internal combustion engine--continued with the perfecting of the modern turbo-electric ship. Sustainable and hybrid technologies, pioneered in small inland watercraft toward the end of the 20th century, have in recent years been scaled up to create integrated electric drives for the largest ocean-going vessels. This comprehensive history traces the birth and rebirth of the electric boat from 1835 to the present, celebrating the Golden Age of electric launches, 1880-1910.
Download or read book Evolving Missions of the U S Navy and the Role of Surface and Sub surface Combatants written by United States. Congress. House. Committee on Armed Services. Projection Forces Subcommittee and published by . This book was released on 2006 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bureau of Ships Manual written by United States. Navy Department. Bureau of Ships and published by . This book was released on 1946 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Naval Ship Propulsion and Electric Power Systems Selection for Optimal Fuel Consumption written by Emmanouil Sarris and published by . This book was released on 2011 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although propulsion and electric power systems selection is an important part of naval ship design, respective decisions often have to be made without detailed ship knowledge (resistance, propulsors, etc.). Propulsion and electric power systems have always had to satisfy speed and ship-service power requirements. Nowadays, increasing fuel costs are moving such decisions towards more fuel-efficient solutions. Unlike commercial ships, naval ships operate in a variety of speeds and electric loads, making fuel consumption optimization challenging. This thesis develops a flexible decision support tool in Matlab® environment, which identifies the propulsion and ship-service power generation systems configuration that minimizes fuel consumption for any ship based on its operating profile. Mechanical-driven propulsion systems with or without propulsion derived ship-service power generation, separate ship-service systems and integrated power systems are analyzed. Modeling includes hull resistance using the Holtrop-Mennen method requiring only basic hull geometry information, propeller efficiencies using the Wageningen B series and transmission and prime movers fuel efficiencies. Propulsion and ship-service power generation systems configuration is optimized using the genetic algorithm. US Navy's Advanced Surface Ship Evaluation Tool (ASSET) model for the DDG-51 Flight I destroyer was used for modeling validation. Optimal fuel consumption results are compared against the existing configuration for the DDG-51 Flight I destroyer using a representative operating profile.
Download or read book United States Naval Institute Proceedings written by United States Naval Institute and published by . This book was released on 1921 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
