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Dissertations / Theses on the topic 'Wind turbine efficiency'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Li, Jiale. "IMPROVE ENERGY PRODUCTION BY USING HIGH EFFICIENCY SMART WIND TURBINE BLADE." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1522420577009512.

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Shaheen, Mohammed Mahmoud Zaki Mohammed. "Design and Assessment of Vertical Axis Wind Turbine Farms." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439306478.

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3

Yilmaz, Eftun. "Benchmarking of Optimization Modules for Two Wind Farm Design Software Tools." Thesis, Högskolan på Gotland, Institutionen för kultur, energi och miljö, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hgo:diva-1946.

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Optimization of wind farm layout is an expensive and complex task involving several engineering challenges. The layout of any wind farm directly impacts profitability and return of investment. Several software optimization modules in line with wind farm design tools in industry is currently attempting to place the turbines in locations with good wind resources while adhering to the constraints of a defined objective function. Assessment of these software tools needs to be performed clearly for assessing different tools in wind farm layout design process. However, there is still not a clear dem

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4

Kachhia, Bhaveshkumar Mahendrabhai. "Design and tribological issues in wind turbine bearings." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0076.

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Grandes bague de roulement utilisés dans éolienne sont l'un des éléments de transmission de charge importantes de ces machines tournantes. Ces roulements fonctionnent grâce à des cycles de charge et de la fréquence et de l'expérience des défis complexes tribologiques sévères. Le coût de remplacement de ces paliers est très élevé et conduit aussi à quantité importante de temps d'arrêt. Il est donc important de comprendre certains des principaux problèmes de conception et tribologiques de ces roulements. Quatre points type de roulement de l'anneau de contact de rotation a été considéré comme une

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Wo, Chung. "PERFORMANCE ASSESSMENT OF THE CASE WESTERN RESERVE UNIVERSITYWIND TURBINE AND CHARACTERIZATION OF WIND AVAILABILITY." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1383338732.

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6

Moragues, Pons Jeremias. "Practical Experiments on the Efficiency of the Remote Presence : Remote Inspection in an Offshore Wind Turbine." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-16780.

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Offshore wind power has become a growing interest in the worldwide society. New research and investigation in this kind of technology is increasing year after year. Thus, the inspection on the offshore wind turbines is expensive but necessary.The goal of this project is to demonstrate the efficiency of a Remote Inspection System inside the nacelle of an Offshore Wind Turbine. The way of carrying out inspections on real nacelles, as well as other aspects from maintenance is discussed. Three different companies have been taken into account when developing an Inspection Plan.This master thesis co

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7

Hamilton, Christopher. "Digital control algorithms : low power wind turbine energy maximizer for charging lead acid batteries." Honors in the Major Thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1280.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Engineering and Computer Science<br>Electrical Engineering and Computer Science

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8

Agbali, Francis Akumabi. "DESIGN AND TESTING OF A WIND ENERGY HARNESSING SYSTEM FOR FORCED CONVECTIVE DRYING OF GRAIN IN LOW WIND SPEED, WARM AND HUMID CLIMATES." UKnowledge, 2019. https://uknowledge.uky.edu/bae_etds/66.

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Forced convective drying using a wind turbine mechanically connected to a ventilation fan was hypothesized for low cost and rapid grain drying in developing countries. The idea was tested using an expandable wind turbine blade system with variable pitch, at low wind speeds in a wind tunnel. The design was based on empirical and theoretical models embedded in a graphical user interface (GUI) created to estimate airflow-power requirements for drying ear corn. Output airflow (0.0016 - 0.0052 m3kg-1s-1) increased within the study wind speed range (2.0 - 5.5 m/s). System efficiency peak (8.6%) was

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9

Carneiro, Francisco Olimpio Moura. "Levantamento de Curvas de EficiÃncia de Aerogeradores de 3m de DiÃmetro Utilizando Modelos de TurbulÃncia Rans de Uma e Duas EquaÃÃes com ComparaÃÃo Experimental." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=5847.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>Realizou-se o levantamento de curvas de eficiÃncia utilizando odelos numÃricos RANS de uma e duas equaÃÃes para um erogerador com 3m de diÃmetro, utilizando pÃs projetadas para operar em diferentes condiÃÃes de λ com perfis NACA 0012, 4412 e 6412. A parametrizaÃÃo da geometria da malha para a dimensÃo do rotor, juntamente com a parametrizaÃÃo do refinamento frente Ã capacidade dos modelos RANS obteve a independÃncia da malha Ã soluÃÃo. Posteriormente a anÃlise numÃrica realizou a comparaÃÃo do melhor resultado â pÃ projetada

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10

Jinbo, Maro. "Contribuições ao projeto de sistemas eólicos de efeito magnus com rastreamento da máxima potência." Universidade Federal de Santa Maria, 2016. http://repositorio.ufsm.br/handle/1/12032.

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This work deals with an unconventional wind energy conversion system, in which the wind turbine has rotating cylinders rather than traditional blades. These cylinders can be driven by a brushless DC motor. The turbine operates on the physical principle called Magnus Effect. It presents the mathematical modeling of Magnus turbine and based on this modeling were carried out simulations in PSIM® software. It was implemented and was tested MPPT algorithms type HCC (Hill Climbing Control) for DC brushless motor control for operating the cylinders and hence the power generated by the Magnus turbine.

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11

Conti, Claudio. "Small-scale physical modelling of piled foundations for offshore wind turbines application." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Nowadays, finding alternative energy sources is becoming more and more important. Europe is particularly focusing on wind energy and in offshore wind energy especially. An issue concerning offshore wind energy which is gaining more and more attention is the noise emissions due to impact driven pile foundation. The noise caused by the installation process has been judged as “potentially dangerous for marine fauna” from the German Authorities. This research thesis is part of a project which examines a viable alternative installation method for the displacement of pile foundations for offshore w

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12

Scheubel, Christopher [Verfasser]. "The German Energy Transition and the Nuclear Phase-Out : On the Cost Efficiency of Wind Turbine Technologies, the Viability of Industrial Self-Supply, and the Effects of Decentralized Generation on the Electricity Grid / Christopher Scheubel." Baden-Baden : Nomos Verlagsgesellschaft mbH & Co. KG, 2017. http://d-nb.info/1160486689/34.

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13

Bekker, Johannes Cornelius. "Efficient modelling of a wind turbine system for parameter estimation applications." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20171.

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Thesis (MScEng)--Stellenbosch University, 2012<br>ENGLISH ABSTRACT: Wind energy is a very current topic, both locally and internationally. It is one of the most rapidly growing renewable energy sources with installed capacity doubling every three years. South Africa's installed wind energy currently accounts for only 10 MW of the 197 GW worldwide installed capacity. With a 10 TWh renewable energy production target set for 2013 by the South African government, renewable energy projects have gained momentum in recent years. This target, together with data from case studies and reports on resour

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Ingersoll, Bryce Taylor. "Efficient Incorporation of Fatigue Damage Constraints in Wind Turbine Blade Optimization." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6985.

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Improving the wind turbine blade design has a significant effect on the efficiency of the wind turbine. This is a challenging multi-disciplinary optimization problem. During the blade design process, the aerodynamic shapes, sizing of the structural members, and material composition must all be determined and optimized. Some previous blade design methods incorporate the wind turbine's static response with an added safety factor to account for neglected dynamic effects. Others incorporate the dynamic response, but in general is limited to a few design cases. By not fully incorporating the dynam

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15

Ikonwa, Charles Amoge. "Experimental and theoretical investigations into the development of an efficient wind turbine." Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/17670/.

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The small-scale wind turbine is considered as one of the most effective renewable technologies due to their potential to provide useful amount of electricity, particularly in ‘‘off-grid’’ settings as well as promising future prospects to decarbonise the power sector and ultimately stabilise energy security. Due to the huge potential of the wind resources and financial incentives, the UK is a promising region for small-scale wind energy development but there has been lack of comprehensive assessment of the wind resource for relevant locations. Thus efficient and low cost techniques are urgently

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16

Balog, Irena. "Analysis of fluid-mechanical efficiency of offshore wind turbines from regional to local scale." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11101.

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2013/2014<br>Renewable energy resources, such as wind, are available worldwide. Locating areas with high and continual wind sources are crucial in pre-planning of wind farms. Vast offshore areas are characterized with higher and more reliable wind resources in comparison with continental areas. However, offshore wind energy production is in a quite preliminary phase. Elaborating the potential productivity of wind farms over such areas is challenging due to sparse in situ observations. Mediterranean basin is not an exception. The overall aim of this thesis is to perform analysis in model effici

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17

Zhang, Hongkun [Verfasser]. "Torque measurement on wind turbines and its application in the determination of drivetrain efficiency / Hongkun Zhang." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2021. http://d-nb.info/1225478375/34.

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Häfele, Jan [Verfasser]. "A numerically efficient and holistic approach to design optimization of offshore wind turbine jacket substructures / Jan Häfele." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2019. http://d-nb.info/1182532586/34.

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19

Hübler, Clemens Janek [Verfasser], and Raimund [Akademischer Betreuer] Rolfes. "Efficient probabilistic analysis of offshore wind turbines based on time-domain simulations / Clemens Janek Hübler ; Betreuer: Raimund Rolfes." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2019. http://d-nb.info/1187440361/34.

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20

Norouzi, Mahdi. "An Efficient Method to Assess Reliability under Dynamic Stochastic Loads." University of Toledo / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1349496534.

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21

Azevedo, Pericles Andre de Assis. "Metodologia de avaliação de rendimento de aerogeradores de pequeno porte utilizando perfis diários típicos de vento." Universidade do Estado do Rio de Janeiro, 2013. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=7701.

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O crescimento do uso dos aerogeradores de pequeno porte em áreas urbanas em todo o mundo aponta para um mercado em expansão e extremamente promissor, principalmente no brasil, onde o potencial eólico é grande. tratando-se de máquinas pequenas existe interesse dos consumidores residenciais na sua utilização, seja para economia de energia ou por adesão às fontes alternativas. existe uma grande quantidade de fabricantes no mundo incluindo aerogeradores de alta, média e baixa qualidade. com isso surge a necessidade de criar métodos que avaliem estes produtos quanto ao seu rendimento energético, co

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22

Lakva, Petr. "Výroba vodíku z obnovitelného zdroje elektrické energie." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230583.

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Hydrogen, as a form of storage for the excess energy from renewable sources, is a technically and economically viable option. However, the technology is not mature enough to compete with the other renewable energy possibilities. In this thesis, a study based on coupling two 330 kW wind-turbines with an NELP. 40 electrolyzer this connection should improve the utilization of wind power. In this thesis are two options of energy utilization. The energy produced by the wind-turbine is stored in the form, of hydrogen and is then delivered for consumption at variable power through a fuel cell, second

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23

Chlebný, Radek. "Autonomní dům aneb život grid-off." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220159.

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This thesis deals with energy self-sufficiency focusing on the independence of the electric grid. Basic line emanating project form a concrete proposal for autonomous energy supply system. Emphasis is placed primarily on photovoltaic systems, electric energy accumulation and selection of individual components of such a system. Another important part of the thesis is also an economic evaluation of design variations. The thesis also deals with a market research, and thereof derived benefit assessment of each technology. The accompanying chapters are then devoted to the history of autonomous life

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24

Tsai, Chih-Wei, and 蔡志威. "Investigation on Evaluation Factors of Wind Turbine Efficiency." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/23142345303855575853.

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碩士<br>國立臺灣大學<br>生物環境系統工程學研究所<br>94<br>The efficiency of thermal, hydraulic, and nuclear power plants can be evaluated by using capacity factor, due to the fact that fuels are continually supplied and properly managed. On the other hand, wind velocity is the fuel of wind turbine. It is never steady and has the cubic relationship with wind energy. Small perturbation in wind speed can result in substantial difference in wind energy. It is thus not adequate to only use capacity factor in the evaluation of wind power plants. Chang et al. (2003) suggests that three wind turbine parameters (capacity

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25

Marques, Pedro Miguel Teixeira. "Efficiency of a gearbox lubricated with wind turbine gear oils." Master's thesis, 2012. http://hdl.handle.net/10216/68298.

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26

Pusha, Ayana T. "Multiple turbine wind power transfer system loss and efficiency analysis." 2013. http://hdl.handle.net/1805/3800.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>A gearless hydraulic wind energy transfer system utilizes the hydraulic power transmission principles to integrate the energy of multiple wind turbines in a central power generation location. The gearless wind power transfer technology may replace the current energy harvesting system to reduce the cost of operation and increase the reliability of wind power generation. It also allows for the integration of multiple wind turbines to one central generation unit, unlike the traditional wind power generation with dedicated generator and

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27

Huang, Chen Wei, and 黃振瑋. "Match Design and Efficiency Improvement of Vertical Axis Wind Turbine." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/02783043612921521940.

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碩士<br>國立交通大學<br>機械工程學系<br>101<br>The purpose of this thesis is to develop a device for adjusting the pitch angles of the wind blades and reduce cogging torque of a permanent magnet generator so that the efficiency of the vertical-axis wind turbine (VAWT) can be increased. We calculate the efficiencies of the VAWT for different pitch angles. The pitch angle that can produce the best efficiency of the VAWT is then used to design the pitch angle adjusting device which is a cam type mechanism. To start rotation at a lower wind speed, we utilize the advantages of resisting type wind blades for the

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Marques, Pedro Miguel Teixeira. "Efficiency of a gearbox lubricated with wind turbine gear oils." Dissertação, 2012. http://hdl.handle.net/10216/68298.

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Huang, Po-Wen, and 黃柏聞. "Structural Failure Analysis and Efficiency Improvement of Composite Wind Turbine Blade." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/43203988515300611526.

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碩士<br>國立交通大學<br>機械工程學系<br>100<br>In this thesis, the failure and efficiency enhancement of composite wind blades are investigated. The basic aerodynamic principles are used to modify the twisting angle of a wind blade with airfoil shape NACA4418. The efficiency of the wind blade has been increased approximately 15%. A finite element model is established to study the deformation and failure strength of the wind blade. The suitability of the finite element model in predicting the deformation of the wind blade has been validated by experimental results. The first-ply failure load as well as the b

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Ortega, Mirna Monserrat Machado, and 瑪安妮. "Research and Development of Low Start Wind Speed and High Efficiency Vertical Axis Wind Turbine." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/98602295187338224371.

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碩士<br>崑山科技大學<br>機械工程研究所<br>98<br>There are many types of Vertical Axis Wind Turbines (VAWT), the Wollongong design, originally conceived in Australia is a very interesting type, because it presents a gear mechanism with a high potential for commercial application. Theoretically there are many options of gear configurations, and the relationship between the number of teeth of each gear (Gear Ratio = G) has an essential impact on the function of the Wollongong turbine. In order to establish the most suitable G for the construction of the turbine, a Numerical Analysis was carried out. Through thi

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31

Yu-HsiangTsao and 曹淯翔. "Power output efficiency in large wind farms with different streamwise turbine spacing." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/z9rzf7.

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32

Bader, Shujaut. "Improving the Efficiency of Wind Farm Turbines using External Airfoils." 2017. https://scholarworks.umass.edu/masters_theses_2/549.

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Wind turbine efficiency typically focuses on the shape, orientation, or stiffness of the turbine blades. In this thesis, the focus is instead on using static fixed airfoils in proximity to the wind turbine to control the airflow coming out of the turbine. These control devices have three beneficial effects. (1) They gather air from “higher up” where the air is moving faster on average (and therefore has more kinetic energy in it). (2) They throw the used (and slowed down air) downwards. This means that any turbines in the wind farm behind the lead turbines do not get “stale” air. (3) These con

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33

Shang-YuHan and 韓尚育. "Numerical Study of Aerodynamic Efficiency and Noise for Small Vertical Axis Wind Turbine." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/68343802138273612678.

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34

CHEN, JHIH-MING, and 陳志明. "Power Efficiency Analysis of a Vertical Axial Wind Turbine with Different Chord Length." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/znt2w9.

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碩士<br>逢甲大學<br>智能製造與工程管理碩士在職學位學程<br>107<br>In recent years, the global warming and the warnings of climate change drive governments to save energy and reduce carbon emmision, and find alternative energy resources to reduce dependence on fossil oil energy. In order to achieve carbon reduction and low cost, some countries tend to use nuclear power. But since the 2011 Fukushima 311 nuclear disaster in Japan, many countries "abandon nuclear and adopt renewable", therefore renewable energy development has more room. In this thesis, the main objective is to design an 1kW vertical axis wind turbin

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35

Chang, Yao-Kang, and 張剛耀. "The Numerical Analysis of Power Efficiency and Aerodynamic Loading in Small Wind Turbine Rotors." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/33141255540183052445.

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碩士<br>大葉大學<br>機械工程研究所碩士班<br>94<br>The purpose of this project is to analyze aerodynamic loading and power efficiency of small wind turbine rotors using numerical method. The mathematic model of aerodynamics of wind turbine rotor in quasi-state is developed based on disk theory, the momentum theory, angular momentum theory and blade element momentum theory. The strip theory is utilized to perform the numerical analysis of mathematic rotor model. The numerical prediction of axial forces, hub moments, torques and pitching moments related to blade positions are reported in this study. The infl

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Boa-WeiChen and 陳柏維. "Power output efficiency in large wind farms with different turbine-array configurations and different incoming flow conditions." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/4nkeju.

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Sousa, João Pedro Barbosa de. "Design and dimensioning of a test rig for efficiency measurements of wind turbine gearboxes up to 2.5 MW." Master's thesis, 2016. https://repositorio-aberto.up.pt/handle/10216/86169.

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Sousa, João Pedro Barbosa de. "Design and dimensioning of a test rig for efficiency measurements of wind turbine gearboxes up to 2.5 MW." Dissertação, 2016. https://repositorio-aberto.up.pt/handle/10216/86169.

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Kopřiva, Tomáš. "Obnovitelné zdroje energie jako námět pro fyzikální experimenty." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-387288.

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Title: Renewable Energy Sources as Inspiration for Physics Experiments Author: Bc. Tomáš Kopřiva Department: Department of Physics Education Supervisor: RNDr. Petr Kácovský, Ph.D. Abstrakt: This thesis deals with a current issue of renewable resources of energy. It focuses on the Sun, wind and hydrogen as energy resources.The first part of the thesis provides a theoretical explanation to these resources and is followed by a practical part with the aim to explain this issue to students by using experiments included in worksheets. The theoretical part is focused on the minimal knowledge that is

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Gamas, Eduardo Lourenço. "Modelação de Sistemas de Energia Renovável em Edifícios." Master's thesis, 2017. http://hdl.handle.net/10316/83193.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia<br>Numa altura em que a introdução de energia renovável em edifícios se torna cada vez mais importante devido às metas Europeias, no âmbito do programa Europa 2020, é necessário conseguir selecionar os equipamentos de produção de energia que consigam fazer o melhor aproveitamento dos recursos naturais com a maior eficiência possível.Neste contexto, foram implementados sistemas de produção de energia através de painéis fotovoltaicos e turbinas eólicas, no algoritmo de uma ferramenta computa

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Lee, Meng-Chieh, and 李孟杰. "Numerical Simulation Methods to Explore Efficient H-type Vertical Axis Wind Turbine." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/41913603405542370143.

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碩士<br>健行科技大學<br>電機工程系碩士班<br>102<br>Small vertical axis wind turbines have the benefits of simple structure and noiseless. It is suitable to be applied for living houses. In this paper a CFD software is adopted to simulate H-type rotors with the same cross section area under three different configuration ratios and to investigate which configuration has maximum energy output. Simulation models are built up using two most popular software (SolidWorks and ZWcad) and compared their simulation outputs. The average torque of rotor model from SolidWorks is about 18% of that from ZWcad. It indicates t

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Gully, Benjamin Houston. "Hybrid powertrain performance analysis for naval and commercial ocean-going vessels." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-08-6270.

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The need for a reduced dependence on fossil fuels is motivated by a wide range of factors: from increasing fuel costs, to national security implications of supply, to rising concern for environmental impact. Although much focus is given to terrestrial systems, over 90% of the world's freight is transported by ship. Likewise, naval warfighting systems are critical in supporting U.S. national interests abroad. Yet the vast majority of these vessels rely on fossil fuels for operation. The results of this thesis illustrate a common theme that hybrid mechanical-electrical marine propulsion systems

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