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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Fully coupled dynamic analysis of a floating wind turbine system

Withee, Jon E. 06 1900 (has links)
CIVINS / The use of wind power is in a period of rapid growth worldwide and wind energy systems have emerged as a promising technology for utilizing offshore wind resources for the large scale generation of electricity Drawing upon the maturity of wind turbine and floater technologies developed by the wind energy and oil and gas industries, respectively, large offshore wind energy systems have been developed and are being proposed for operation in offshore areas where environmental restrictions are less restrictive, large wind resources exist, and open sea areas are available for wind farm development. A fully coupled dynamic analysis/technique was developed to predict the response of a floating wind turbine system in a stochastic wind and wave environment This technique incorporated both non-linear wave loading on the submerged floater and the aerodynamic loading on the wind turbine A tension leg spar buoy was designed to support the wind turbine This design was chosen due to its relatively small size and hence lower potential cost per wind turbine The system's tethers were attached to the ends of spokes which radiated out from the spar cylinder This arrangement of lines and spokes promised to be very stiff in the roll and pitch modes of motion.
2

Sail aerofoil applied to a vertical-axis wind turbine

Robert, Jean. January 1977 (has links)
No description available.
3

Theoretical analysis of the performance of a small wind energy converter

Winberg, Helena, Tiestö, Micaela January 2008 (has links)
<h1>Abstract</h1><p>This thesis has been done in Barcelona, Spain, in cooperation with the University of Gävle (HiG) and the Universitat Politècnica de Catalunya (UPC). At UPC there is a project carried out where the goal is to analyze the characteristics and performance of the wind turbine IT-100, with an intention to optimize it. This is carried out by assignment of Engineers Without Borders and Practical Action. The purpose of the thesis has been to present what power, value of tension and current the turbine will produce in different wind velocities.</p><p> </p><p>The IT-100 is built to generate electricity to the population in the countryside in, among other countries, Peru. The energy the turbine captures from the wind will be used to charge vehicle batteries that are used in the households as a source of electricity. This is an effective, cheap and environmental-friendly way of supplying households with electricity.</p><p> </p><p>The idea of using the energy in the wind has been known for thousands of years. It started with simple windmills for grinding grain and later more complicated machines like wind turbines were created. Wind power is one of the worlds cleanest sources of energy with as good as no emissions at all while in running.</p><p> </p><p>The result of the work with this thesis work is an Excel file where the, by the purpose requested, parameters are presented in relation to different wind velocities. With some conditions set from the start, some known values of reference and the rotor blades rotational speed as a key variable, these parameters were possible to calculate.</p><p> </p><p>During the work, the project came upon some difficulties such as; not enough information about the wind turbine, too little previous knowledge among the students and trouble with the Spanish language. However, on the whole the project has been successful and a good learning experience.</p>
4

Winds of change : renewable energy and the location of wind turbines in Prince Edward County, Ontario /

Lopes, Sandra L. January 2004 (has links)
Thesis (M.A.)--York University, 2004. Graduate Programme in Geography. / Typescript. Includes bibliographical references (leaves 170-178). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL:http://gateway.proquest.com/openurl?url%5Fver=Z39.88-2004&res%5Fdat=xri:pqdiss&rft%5Fval%5Ffmt=info:ofi/fmt:kev:mtx:dissertation&rft%5Fdat=xri:pqdiss:MQ99350
5

Changing institutional landscapes for implementing wind power a geographical comparison of institutional capacity building : the Netherlands, England and North Rhine-Westphalia /

Breukers, Sylvia. January 1900 (has links)
Thesis (Ph. D.)--Universiteit van Amsterdam, 2007. / Title from PDF title page (viewed Mar. 14, 2007). Includes bibliographical references.
6

Theoretical analysis of the performance of a small wind energy converter

Winberg, Helena, Tiestö, Micaela January 2008 (has links)
Abstract This thesis has been done in Barcelona, Spain, in cooperation with the University of Gävle (HiG) and the Universitat Politècnica de Catalunya (UPC). At UPC there is a project carried out where the goal is to analyze the characteristics and performance of the wind turbine IT-100, with an intention to optimize it. This is carried out by assignment of Engineers Without Borders and Practical Action. The purpose of the thesis has been to present what power, value of tension and current the turbine will produce in different wind velocities.   The IT-100 is built to generate electricity to the population in the countryside in, among other countries, Peru. The energy the turbine captures from the wind will be used to charge vehicle batteries that are used in the households as a source of electricity. This is an effective, cheap and environmental-friendly way of supplying households with electricity.   The idea of using the energy in the wind has been known for thousands of years. It started with simple windmills for grinding grain and later more complicated machines like wind turbines were created. Wind power is one of the worlds cleanest sources of energy with as good as no emissions at all while in running.   The result of the work with this thesis work is an Excel file where the, by the purpose requested, parameters are presented in relation to different wind velocities. With some conditions set from the start, some known values of reference and the rotor blades rotational speed as a key variable, these parameters were possible to calculate.   During the work, the project came upon some difficulties such as; not enough information about the wind turbine, too little previous knowledge among the students and trouble with the Spanish language. However, on the whole the project has been successful and a good learning experience.
7

Effects of voltage unbalance and system armonics on the performance of doubly fed induction wind generators

Kiani, Morgan Mozhgan. January 2009 (has links)
Thesis (Ph.D.)--University of Texas at Arlington, 2009.
8

Aerodynamic design of a tilting wind tunnel for the study of a glider in ground effect

Velásquez E., Andrés Felipe. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2008. / Title from document title page. Document formatted into pages; contains xiv, 125 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 110-112).
9

Multi-flexible-body analysis for applications to wind turbine control design

Lee, Donghoon, January 2003 (has links) (PDF)
Thesis (Ph. D.)--School of Aerospace Engineering, Georgia Institute of Technology, 2004. Directed by Dewey H. Hodges. / Vita. Includes bibliographical references (leaves 111-115).
10

Sail aerofoil applied to a vertical-axis wind turbine

Robert, Jean. January 1977 (has links)
No description available.

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