Download or read book Impacts of Electric Propulsion Systems on Submarine Design written by Michael Alfred Ballard and published by . This book was released on 1989 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical study was carried out on the effects of replacing submarine turbine-reduction gear propulsion drive systems with an equivalent electric drive system. Alternating current (A.C.) and direct current (D.C.) systems were designed using computer based machine synthesis programs. The systems considered included direct drive motors operating at the speed of the submarine drive shaft and motors operating at higher speeds in conjunction with integral single stage reduction gears. Methods to improve the efficiency of the various motors for speeds other than rated speed were examined. The impacts of the electric system designs were evaluated in terms of the ability of a mechanical drive submarine design to accept the replacement of the mechanical components with the equivalent electric components and meet standard submarine design closure criteria. All electric drive variants met the basic naval architectural feasibility requirements. Electric drive systems were heavier, required less arrangeable volume and were generally less efficient than the mechanical baseline ship. Gear reduced electric systems were lighter and more than the direct drive, low speed motor based systems. Electric submarine drive is a feasible alternative to conventional mechanical, locked train transmission systems. Electric drive installations carry penalties in terms of added weight and reduced propulsion plant efficiency that must be recognized and accepted by the ship designer. Keywords: Theses; Submarine engineering; Electric propulsion system.

Download or read book A Comparative Study of Various Electric Propulsion Systems and Their Impact on a Nominal Ship Design written by James Clinton Davis and published by . This book was released on 1987 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 34 (thesis year 1989) a total of 13,377 theses titles from 26 Canadian and 184 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 34 reports theses submitted in 1989, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.

Download or read book An Impact Analysis of Superconducting Electrical Propulsion Systems on Naval Ship Design written by William Joe York and published by . This book was released on 1979 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three different proposed propulsion systems which incorporate superconducting electric machines are described. Two of these systems utilize a propulsion system integrated ship service electrical system. A ship synthesis computer model is used to determine the gross characteristics, detailed weight and volumes, maximum sustained speed, and endurance fuel requirements for each proposed design. Each of the designs is compared to a baseline ship, the FFG-7, to determine the impact of a superconducting propulsion system on gross characteristics, maximum sustained speed, endurance fuel, general arrangements, payload, vulnerability/survivability, risk, maintenance, and cost. Final comparison of the proposed designs shows a 31% reduction in propulsion machinery weight for all candidates. The two superconducting/integrated designs show a 61% reduction in electrical machinery weight, a 6% reduction in total required volume, a 10% reduction in full load displacement, a 7% increase in maximum sustained speed, and an 8% reduction in fuel.

Download or read book Technical Reports Awareness Circular TRAC written by and published by . This book was released on 1989-12 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Environmental Impact of Ships written by Stephen de Mora and published by Cambridge University Press. This book was released on 2020-11-05 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, global review of the impact ships have on the environment, covering pollutant discharges, non-pollutant impacts and international legislation.

Download or read book Electric Propulsion Applications and Impacts written by Frank M. Curran and published by . This book was released on 1996 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Submarine Electric Propulsion System with Large Hub Propeller written by Michael Scott Hammer and published by . This book was released on 1983 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements written by and published by . This book was released on 1974 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Masters Theses in the Pure and Applied Sciences written by W. H. Shafer and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 24 (thesis year 1979) a total of 10,033 theses titles from 26 Canadian and 215 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. While Volume 24 reports these submitted in 1979, on occasion, certain universities do report theses submitted in previous years but not reported at the time.

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerospace Technologies of Bell Aircraft Company a Pictorial History 1935 1985 written by August A. Cenkner Jr. and published by AuthorHouse. This book was released on 2011-08-02 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main thrust of this book is to acknowledge the technologies that the Bell-aerospace-company developed or refined. If certain programs incorporated technologies that were basically the same as other programs, then these same technology programs were not included in detail.

Download or read book Concepts in Submarine Design written by Roy Burcher and published by Cambridge University Press. This book was released on 1995-10-27 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the many engineering and architectural aspects of submarine design and how they relate to each other and the operational performance required of the vessel. Concepts of hydrodynamics, structure, powering and dynamics are explained, in addition to architectural considerations which bear on the submarine design process. The interplay between these aspects of design is given particular attention, and a final chapter is devoted to the generation of the concept design for the submarine as a whole. Submarine design makes extensive use of computer aids, and examples of algorithms used in concept design are given. The emphasis in the book is on providing engineering insight as well as an understanding of the intricacies of the submarine design process. It will serve as a text for students and as a reference manual for practising engineers and designers.

Download or read book Analysis of the Operational Impacts of Alternative Propulsion Configurations on Submarine Maneuverability written by Brian Douglas Heberley and published by . This book was released on 2011 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an effort to develop submarine designs that deliver reduced size submarines with equivalent capabilities of the current USS VIRGINIA (SSN-774 Class) submarine, a joint Navy/Defense Advanced Research Projects Agency (DARPA) called the Tango Bravo (TB) program was initiated in 2004 to overcome technology barriers that have a large impact on submarine size and cost. A focus area of the TB program is propulsion concepts not constrained by a centerline shaft. This thesis investigates the operational impacts that a conceptual propulsion configuration involving the use of azimuthing podded propulsors has on a submarine. Azimuthing pods have been used commercially for years, with applications on cruise ships being quite common although their use on large naval platforms has been nonexistent to date. The use of such systems on a submarine would allow for the removal of systems related to the centerline shaft; freeing up volume, weight, and area that must be allocated and potentially allowing the submarine designer to get outside the speed-size-resistance circular path that results in large, expensive platforms. Potential benefits include having the pods in a relatively undisturbed wake field -possibly increasing acoustic performance as well as improving operational maneuvering characteristics. For this thesis a submarine maneuvering model was created based on analytical techniques and empirical data obtained from the DARPA SUBOFF submarine hullform. This model was analyzed for two configurations: ** A centerline shaft configuration utilizing cruciform control surfaces for yaw and pitch control; ** A podded configuration utilizing pods for propulsion as well as yaw and pitch control. The maneuvering characteristics for each configuration were investigated and quantified to include turning, depth changing, acceleration, deceleration, and response to casualties.

Download or read book Bureau of Ships Journal written by and published by . This book was released on 1964 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: