Дисертації з теми "Wind turbine design"
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Chaath, Alaaeddin. "Improving the Design of Wind Turbine Plants : Future Design of Wind Turbine Plants." Thesis, Högskolan i Halmstad, Energivetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-31084.
Повний текст джерелаGwon, Tae gyun. "Structural Analyses of Wind Turbine Tower for 3 kW Horizontal Axis Wind Turbine." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/600.
Повний текст джерелаSchmidt, Michael Frank. "Economic optimization of wind turbine design." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19740.
Повний текст джерелаEl-Bardisi, Mansour Mohamed Mansour. "Reduction of wind turbine noise through design." Thesis, City University London, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332781.
Повний текст джерелаLee, Donghoon. "Multi-flexible-body analysis for applications to wind turbine control design." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04052004-180040/unrestricted/lee%5Fdonghoon%5F200312%5Fphd.pdf.
Повний текст джерелаShaheen, 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.
Повний текст джерелаOlivieri, David Allen. "Design and testing of a concentrator wind turbine." Thesis, Open University, 1991. http://oro.open.ac.uk/54560/.
Повний текст джерелаPeng, Li. "Analysis and Design of Offshore Jacket Wind Turbine." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11612.
Повний текст джерелаSæta, Eivind. "Design of Airfoil for downwind wind turbine Rotor." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-12883.
Повний текст джерелаKachhia, Bhaveshkumar Mahendrabhai. "Design and tribological issues in wind turbine bearings." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0076.
Повний текст джерелаLarge slewing ring bearings used in wind turbine are one of the important load transmitting elements of these rotating machines. These bearings operate through complex load and frequency cycles and experience severe tribological challenges. The cost of replacement of these bearings is very high and also leads to significant amount of down-time. It is therefore important to understand some of the major design and tribological issues in these bearings. Four-point contact slewing ring bearing type has been considered as a baseline for this study to demonstrate contact truncation and cage failure issues for pitch bearings. An alternate two-point contact bearing is proposed to eliminate contact truncation and reduce the cage force build-up. The design and analysis methods demonstrated in this study can be easily extended to yaw bearings as well as other large bearings used in the industry
Zhang, Hui. "Wind turbine adaptive blade integrated design and analysis." Thesis, Northumbria University, 2013. http://nrl.northumbria.ac.uk/21439/.
Повний текст джерелаDu, Yingkang. "An Orthogonal Savonius-type Wind Turbine: Design and Experiments." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1459510710.
Повний текст джерелаVeldkamp, Herman Frederik. "Chances in wind energy : a probabilistic approach to wind turbine fatigue design /." [Delft] : DUWIND Delft Univ. Wind Energy Research Inst, 2006. http://www.gbv.de/dms/bs/toc/520167805.pdf.
Повний текст джерелаFossum, Peter Kalsaas. "Aeroelastic analysis of an offshore wind turbine : Design and Fatigue Performance of Large Utility-Scale Wind Turbine Blades." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18547.
Повний текст джерелаRynkiewicz, Mateusz. "Design of PM generator for avertical axis wind turbine." Thesis, Uppsala universitet, Elektricitetslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-177309.
Повний текст джерелаDuran, Serhat. "Computer-aided Design Of Horizontal-axis Wind Turbine Blades." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605790/index.pdf.
Повний текст джерелаpower required from a turbine, number of blades, design wind velocity and blade profile type (airfoil type). The program can be used by anyone who may not be intimately concerned with the concepts of blade design procedure and the results taken from the program can be used for further studies.
Di, Pietro Joshua (Joshua Michael). "Structural analysis and design of floating wind turbine systems." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/50575.
Повний текст джерелаIncludes bibliographical references (p. 139-140).
As oil supply rates approach potential maximums and the global detrimental effects of carbon emitting energy technology are becoming more comprehensively understood, the world is searching for environmentally benign energy technology which can be reliably and economically harvested. Deep water offshore wind is a vast, reliable and potentially economical energy source which remains globally untapped. In order to harvest this resource, potential floating turbine systems must be analyzed and designed for economic production and deployment, reliable operation, and adequate service life. The Laboratory of Ship and Platform Flow (LSPF) has created trusted hydrodynamic modeling software used to perform a Pareto Optimization which resulted in an optimized Floating Wind Turbine (FWT) design which is a Tension Leg Platform (TLP); hereto called MIT TLP-1. This thesis details the structural design aspects of Floating Wind Turbines (FWT) in a rationally based optimization approach for incorporation into existing LSPF hydrodynamic optimization approaches. A steel structural design is created based on the geometry and loading of the MIT TLP-1 for a 10m significant wave height. The design is based on similar system analysis, classic linear structural theory, American Bureau of Shipping rules and American Petroleum Institute recommended practices. The design is verified using Finite Element Analysis (FEA). The results of this work show that the MIT TLP-1 design is technically feasible from a structural integrity, performance and producibility standpoint.
by Joshua Di Pietro.
S.M.in Mechanical Engineering and Naval Architecture and Marine Engineering
Dey, Soumitr. "Wind Turbine Blade Design System - Aerodynamic and Structural Analysis." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1307440410.
Повний текст джерелаCaboni, Marco. "Probabilistic design optimization of horizontal axis wind turbine rotors." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7338/.
Повний текст джерелаNicholson, John Corbett. "Design of wind turbine tower and foundation systems: optimization approach." Thesis, University of Iowa, 2011. https://ir.uiowa.edu/etd/1042.
Повний текст джерелаVan, Zyl Willem Sternberg. "Concrete wind turbine towers in Southern Africa." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96021.
Повний текст джерелаENGLISH ABSTRACT: Exponential growth of the global wind turbine market has led to a significant increase in the capacity of wind turbine generators. Modern turbines require higher support structures as higher wind speeds combined with longer blades are necessary to increase their generating capacity. The standard 80-90 m tower is thus not economically viable anymore. Transportation logistics of large steel towers has led to concrete towers becoming a viable option. There are currently no design codes dealing exclusively with the design of concrete wind turbine towers. The aim of this project is to investigate and highlight important aspects of the design process of a normally reinforced high strength concrete wind turbine tower. The tower was designed using nonlinear finite element modelling as a design tool to accurately design the tower for various loads and load cases. An analytical design method was developed that can be used in the preliminary design stage. Finally, the importance of the soil-structure interaction was investigated through a sensitivity analysis. It was found that the formation of cracks greatly affected the stiffness of the structure and that the reduction in stiffness increased the deflection significantly. It was also found that a structure that has sufficient strength to resist the ULS loads may not necessarily comply with the maximum deflection limit for the SLS. The concrete strength class required was not only determined by the maximum compression stress the concrete would experience, but also by the stiffness required to ensure that the tower frequency is within the turbine’s working frequency. The dynamic behaviour of the tower was also affected by the formation of cracks. The fundamental frequency of the tower was reduced by 46% after the SLS loads were applied. It was found that the soil preparation for the foundation plays a vital role in ensuring that the tower frequency is not reduced to a level where it falls outside the turbine working frequency.
AFRIKAANSE OPSOMMING: Die eksponensiële groei van die globale wind turbine mark het gelei tot ʼn beduidende toename in die opwekkingskapasiteit van wind turbine kragopwekkers. Moderne turbines benodig hoër ondersteuningstrukture om hulle opwekkingskapasiteit te verhoog en daarom is die standaard 80-90 m toring nie meer geskik nie. Die vervoer logistiek van groot staal torings het daartoe gelei dat beton torings ʼn lewensvatbare opsie geword het. Daar is huidiglik geen ontwerpkodes wat uitsluitlik handel met die ontwerp van beton wind turbine torings nie. Die doel van hierdie projek is om die ontwerp proses van ʼn bewapende hoë sterkte beton wind turbine toring te ondersoek en belangrike aspekte uit te lig. Die toring word ontwerp deur ʼn nie-liniêre eindige element model te gebruik as ʼn ontwerp hulpmiddel, om die toring akkuraat te ontwerp vir verskeie laste en lasgevalle. ʼn Analitiese ontwerpmetode is ontwikkel wat gebruik kan word in die voorlopige ontwerpfase. Laastens is die grond-struktuur interaksie ondersoek deur ʼn sensitiwiteitsanalise. Daar is gevind dat die vorming van krake die styfheid van die struktuur aansienlik beïnvloed en dat die vermindering in styfheid die defleksie beduidend vermeerder. Daar is ook gevind dat ʼn struktuur wat voldoende sterkte het om die uiterste lastoestande te weerstaan, nie noodwendig voldoen aan die maksimum defleksiegrens vir die diens lastoestande nie. Die beton sterkte klas wat benodig is, is nie net bepaal deur die maksimum druk spanning wat die beton sal ondervind nie, maar ook deur die styfheid wat vereis word om te verseker dat die toring se frekwensie binne die turbine se werksfrekwensie val. Die dinamiese gedrag van die toring is ook beïnvloed deur die vorming van krake. Die fundamentele frekwensie van die toring is verlaag met 46% nadat die diens lastoestande toegepas is. Daar is gevind dat die grond voorbereiding vir die fondasie ʼn belangrike rol speel om te verseker dat die toring se frekwensie nie verlaag word tot ʼn vlak waar dit buite die turbine se werksfrekwensie val nie.
Lack, L. W. "The design of wind turbine rotors in relation to fatigue." Thesis, University of Reading, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371440.
Повний текст джерелаHand, M. Maureen. "Variable-speed wind turbine controller systematic design methodology : a comparison of non-linear and linear model-based designs /." Golden, CO : National Renewable Energy Laboratory, 1999. http://www.nrel.gov/docs/fy99osti/25540.pdf.
Повний текст джерелаNel, Emma. "Design and analysis of small scale wind turbine support structures." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71848.
Повний текст джерелаENGLISH ABSTRACT: A technology that has advanced immeasurably as a result of the necessity for green energy production is the harnessing of wind energy. One of the most important aspects of a wind turbine is its supporting structure. The tower of a wind turbine needs to be sufficiently reliable and structurally sound to ensure that the design life of the wind turbine machine is unaffected. The tower also needs to be of the correct height to ensure that the full potential of energy capture is realised. The supporting structure of a wind turbine constitutes up to as much as 30% of the total costs of a wind turbine. The most common wind turbine supporting structures seen worldwide today are Steel Monopole Towers. The large cost proportion of the tower compels the industry to investigate the most feasible alternative supporting tower structures and thus prompted the research developed in this thesis. In this thesis the focus is on small scale wind turbines (<50kW), more specifically, a 3kW Wind Turbine. The proposed alternative design the support structures of small scale wind turbines to the presently used Steel Monopole tower was a Steel Lattice tower. Both a Steel Lattice and Steel Monopole Tower was designed for a 3kW Wind Turbine using rational design methods determined from pertinent sections of the South African design codes. The Tower designs needed to incorporate the details of the element connections, so as to encompass all of the cost parameters accurately. The foundation design of each of the towers was also required from the point of view of cost analysis completeness, and ended up playing a critical role in the feasibility analysis. To validate the design methods, the two towers were modelled in the finite element package Strand7 and a number of different analyses were performed on the two towers. The analyses included linear static, nonlinear static, natural frequency and harmonic frequency analyses. The towers were assessed for a number of different load case combinations and were examined in terms of stress states, mass participation factors and deflections, to mention a few, for the worst loading combination cases that were encountered. Once a final design was reached for both the Steel Lattice and Steel Monopole Towers, each element from which they were made was assessed from a structural viewpoint to determine manufacturing and construction costs. The cost analysis was conducted by means of asking a number of leading construction companies for unit prices for each of the identified elements to be assessed. The fabrication and construction of each of the Towers was then compared to determine which one was more feasible, in terms of each design aspect considered as well as looking at the complete end product. It was found that the Steel Lattice Tower was more feasible from the points of view of fabrication, and construction, as well as having a far more cost effective foundation. This was a positive conclusion from the perspective of the proposal for a more feasible alternative to the presently used Steel Monopole Towers. The outcome of the research conducted here could certainly prove to be worth considering from a wind farm development perspective, with particular focus on the up and coming Wind Industry developments in South Africa.
AFRIKAANSE OPSOMMING: As gevolg van die noodsaaklikheid vir die produksie van volhoubare energie is ʼn tegnologie wat met rasse skrede vooruitgegaan het die vir die benutting van windenergie. Een van die belangrikste aspekte van 'n windturbine is die ondersteunende struktuur. Die toring van 'n windturbine moet funksioneel en struktureel betroubaar wees om te verseker dat die ontwerpleeftyd van die windturbine masjien nie nadelig beïnvloed word nie. Die toring moet ook die regte hoogte wees om te verseker dat die volle potensiaal van die wind energie in meganiese energie omgesit word. Die koste van die ondersteunende struktuur van 'n windturbine verteenwoordig tot 30% van die totale koste van 'n windturbine. Die mees algemene vorm van ondersteunende strukture vir windturbines wat vandag wêreldwyd teëgekom word, is die van 'n enkel staal buisvormige toring. Die groot koste‐komponent van die toring dwing die industrie om ondersoek in te stel na die mees koste effektiewe prakties uitvoerbare alternatief vir die ondersteunende toring struktuur. Hierdie aspek van die struktuur konseptualisering het gelei tot die navorsing wat in hierdie tesis onderneem is. Die fokus van die navorsing is op klein skaal windturbines (<50kW), en meer spesifiek op 'n 3kW windturbine model. Die alternatiewe ontwerp wat ontwikkel is vir klein skaal wind turbines se ondersteunende structure, is 'n staal vakwerk toring as alternatief vir die staal buisvormige toring. Beide 'n staal vakwerk en staal buisvormige toring vir 'n 3kW wind turbine is ontwerp deur rasionele ontwerp metodes. Die toepaslike gedeeltes van die Suid‐Afrikaanse ontwerp kodes is hiervoor gebruik. Die ontwerp vir die toring moet die besonderhede van die element verbindings in ag neem en die nodige koste parameters moet akkuraat bepaal word. Die ontwerp van die fondament van elke toring is ook noodsaaklik vir die volledigheid van die koste‐ontleding en dit speel ook 'n kritieke rol in die gangbaarheid analise. Om die ontwerp metodes te bevestig, is die twee tipes torings in die eindige element pakket, Strand7, gemodelleer en 'n aantal verskillende ontledings vir die twee torings is uitgevoer. Die ontledings sluit lineêr en nie‐lineêr statiese ontledings asook natuurlike frekwensie en dinamiese ontledings onder harmoniese belastings in. Die torings is vir 'n aantal verskillende lasgevalkombinasies ondersoek en in die spannings toestande, massadeelname faktore en defleksies vir die ergste laskombinasie gevalle wat ondervind is, is geassesseer. Sodra 'n finale ontwerp vir beide die staal vakwerk en staal buisvormige toring voltooi is, is elke element beoordeel uit 'n strukturele en materiaal oogpunt om die kostes daarvan te bepaal. Die koste‐analise is baseer op data wat voorsien is deur 'n aantal vooraanstaande konstruksiemaatskappye op 'n prys per eenheid basis vir elk van die geïdentifiseerde elemente wat geassesseer moes word. Die vervaardiging en konstruksie van elke toring is dan vergelyk om te bepaal watter een die mees haalbaar is, in terme van elke toepaslike ontwerpsaspek en deur ook die volledige eindproduk te evalueer. Daar is bevind dat die staal vakwerk toring uit die oogpunt van vervaardiging en konstruksie, asook as gevolg van 'n meer koste‐effektiewe fondament, die voorkeur alternatief verteenwoordig het. Dit was 'n positiewe gevolgtrekking uit die oogpunt van die soeke na 'n ander alternatief as die buisvormige staal torings wat tans algemeen in gebruik is. Die uitkoms van hierdie navorsing verdien oorweging uit ʼn windplaas ontwikkelingsperspektief, met ʼn spesifieke fokus op die opkomende ontwikkelinge in die wind energie industrie in Suid‐Afrika.
Norström, Parliden Jonas, and Mateusz Rynkiewicz. "Design of PM generator for a vertical axis wind turbine." Thesis, Uppsala universitet, Elektricitetslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-180910.
Повний текст джерелаColley, Gareth. "Design, operation and diagnostics of a vertical axis wind turbine." Thesis, University of Huddersfield, 2012. http://eprints.hud.ac.uk/id/eprint/17547/.
Повний текст джерелаJaen, Sola Pablo. "Advanced structural modelling and design of wind turbine electrical generators." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=28677.
Повний текст джерелаParker, Nicholas W. (Nicholas William). "Extended tension leg platform design for offshore wind turbine systems." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40369.
Повний текст джерелаIncludes bibliographical references (p. 85).
The rise of reliable wind energy application has become a primary alternative to conventional fossil fuel power plants in the United States and around the world. The feasibility of building large scale wind farms has become increasingly dependent on location. The ideal locations require placement in desolate areas with limited or no visibility from surrounding communities, and with the presence of a consistent wind-enriched climate. Deployments of wind turbines in an offshore environment where water depths exceed 30 meters satisfy these requirements. Studies have shown that existing offshore wind turbine systems are limited to shallower coastal waters by the cost of constructing and installing the support structures. This thesis provides a continued parametric analysis of floating platforms for the support of offshore wind turbine systems. In particular, the Tension Leg Platform design will be optimized. Optimization is achieved through the coupling of wave-body interaction theory for the platform along with the aerodynamic performance of a 5-Megawatt wind turbine in the frequency domain. The study provides comparisons over a variety of initial tether tensions and the dynamic response and performance of the platform in several sea states.
(cont.) Statistical quantities are evaluated to ensure these tensions provide adequate forces in storms for various sea states where the significant wave heights can be expected to be 5 meters or greater. The Tension Leg Platform is substantially resistant to heave, pitch and roll motions; therefore, methods of damping the larger surge and sway responses are presented and discussed.
by Nicholas W. Parker.
S.M.in Naval Architecture and Marine Engineering and Mechanical Engineering
Anbreen, Faiqa. "Design of airborne wind turbine and computational fluid dynamics analysis." Thesis, California State University, Long Beach, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=1606691.
Повний текст джерелаWind energy is a promising alternative to the depleting non-renewable sources. The height of the wind turbines becomes a constraint to their efficiency. Airborne wind turbine can reach much higher altitudes and produce higher power due to high wind velocity and energy density. The focus of this thesis is to design a shrouded airborne wind turbine, capable to generate 70 kW to propel a leisure boat with a capacity of 8-10 passengers. The idea of designing an airborne turbine is to take the advantage of higher velocities in the atmosphere.
The Solidworks model has been analyzed numerically using Computational Fluid Dynamics (CFD) software StarCCM+. The Unsteady Reynolds Averaged Navier Stokes Simulation (URANS) with K-ϵ turbulence model has been selected, to study the physical properties of the flow, with emphasis on the performance of the turbine and the increase in air velocity at the throat. The analysis has been done using two ambient velocities of 12 m/s and 6 m/s. At 12 m/s inlet velocity, the velocity of air at the turbine has been recorded as 16 m/s. The power generated by the turbine is 61 kW. At inlet velocity of 6 m/s, the velocity of air at turbine increased to 10 m/s. The power generated by turbine is 25 kW.
Wiratama, I. Kade. "Aerodynamic design of wind turbine blades utilising nonconventional control systems." Thesis, Northumbria University, 2012. http://nrl.northumbria.ac.uk/11375/.
Повний текст джерелаWeng, Bowen. "AN OFFSHORE FLOATING WIND TURBINE PLATFORM PROTOTYPE: DESIGN AND EXPERIMENTATION." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1467896225.
Повний текст джерелаMewburn-Crook, Anthony. "The design and development of an augmented vertical axis wind turbine." Thesis, Kingston University, 1990. http://eprints.kingston.ac.uk/20541/.
Повний текст джерелаDeng, Yun. "Design optimization of a micro wind turbine using computational fluid dynamics." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B4098770X.
Повний текст джерелаDeng, Yun, and 鄧昀. "Design optimization of a micro wind turbine using computational fluid dynamics." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B4098770X.
Повний текст джерелаMarnett, Markus [Verfasser]. "Multiobjective Numerical Design of Vertical Axis Wind Turbine Components / Markus Marnett." Aachen : Shaker, 2012. http://d-nb.info/1067735100/34.
Повний текст джерелаSamson, Jonathan. "Control design and energy optimisation of a buoyant airborne wind turbine." Thesis, University of Strathclyde, 2018. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=30823.
Повний текст джерелаKluger, Jocelyn Maxine. "Synergistic design of a combined floating wind turbine - wave energy converter." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111692.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 241-251).
Offshore energy machines have great potential: higher capacity factors, more available space, and lower visual impacts than onshore machines. This thesis investigates how combining a wave energy converter (WEC) with a floating wind turbine (FWT) may produce offshore renewable energy cost savings. Attaching the WEC to the FWT greatly reduces the WEC's steel frame, mooring lines, electric transmission lines, and siting/permitting costs, which may comprise 56% of a standalone WEC's cost. A 5 MW FWT currently requires up to 1700 tons of platform steel and 5700 tons of ballast concrete for stabilization in the ocean. This required material may be reduced if the WEC stabilizes the FWT. This thesis addresses several challenges to designing a combined FWT-WEC. First, parameter sweeps for optimizing ocean machine performance are limited by high dimensionalities and nonlinearities, including power takeoff control and wave viscous forcing, which normally require computationally expensive time-domain simulations. This thesis develops a statistical linearization approach to rapidly compute machine dynamics statistics while accounting for nonlinearities in the frequency domain. It is verified that the statistical linearization method may capture significant dynamics effects that are neglected by the traditional Taylor series linearization approach, while computing the results approximately 100 times faster than time domain simulations. Using Morison's equation for wave viscosity and quasi-steady blade-element/momentum theory for rotor aerodynamics, we find that viscous effects and nonlinear aerodynamics may increase the FWT motion and tower stress by up to 15% in some wind-sea states compared the the Taylor series linearized system. Second, the WEC must stabilize rather than destabilize the FWT. This thesis investigates the dynamics statistics of dierent FWT-WEC configurations using a long wavelength, structurally coupled model. It is shown that simultaneous targeted energy transfer from both the FWT and waves to the WEC when the WEC and FWT are linked by a tuned spring is unlikely. That being said, this thesis considers heave-mode oscillating water column WEC's that are linked to the FWT platform by 4-bar linkages, so that the FWT and WEC's are uncoupled for small heave motions and rigidly coupled in all other degrees of freedom. It is shown that this configuration allows the WEC to move with a large amplitude in its energy harvesting degree of freedom, and therefore harvest a significant amount of power without significantly increasing the FWT motion in the same direction. In the rigidly-connected modes, the WEC inertial resistance to motion must be greater than the wave forcing, as these properties are transmitted to the FWT. Third, the WEC requires power robustness in dierent sea states. Typical WEC's require control schemes to maintain good power performance when the ocean wave dominant frequency differs from the WEC resonant frequency. This thesis introduces a nonlinearity into the WEC design that passively increases power adaptability in dierent sea states. While the optimized nonlinear WEC requires 57% more steel than the optimized linear WEC, the nonlinear WEC produces 72% more power on average, resulting in a 3% lower levelized cost of energy. Further optimization of the nonlinear WEC may find improved performance. This thesis determines that attaching a single linear hinged floating spar oscillating water column to the FWT reduces the levelized cost of energy from $0.31/kWh for the standalone system to $0.27/kWh (13%) without changing stress on the FWT tower. Attaching a single nonlinear hinged floating spar oscillating water column to the FWT reduces the levelized cost of energy to $0.26/kWh (16%) and reduces the lifetime equivalent fatigue stress on the FWT tower from 32.4 MPa to 31 MPa (5%). A 6-unit array of the nonlinear WEC's encircling the FWT platform may generate an average of 400 kW while reducing the FWT tower stress by over 50%. In wave tank experiments, the response statistics of four dierent combined FWT-WEC configurations are measured, verifying the FWT-WEC dynamics model.
by Jocelyn Maxine Kluger.
Ph. D.
Tang, Xinzi. "Aerodynamic design and analysis of small horizontal axis wind turbine blades." Thesis, University of Central Lancashire, 2012. http://clok.uclan.ac.uk/7127/.
Повний текст джерелаYilmaz, 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.
Повний текст джерелаHu, Weifei. "Reliability-based design optimization of composite wind turbine blades for fatigue life under wind load uncertainty." Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/1854.
Повний текст джерелаPoole, Sean Nichola. "Optimisation of a mini horizontal axis wind turbine to increase energy yield during short duration wind variations." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/7036.
Повний текст джерелаMondrago, Quevedo Monica. "Probabilistic modelling of geotechnical conditions for offshore wind turbine support structures." Thesis, Cranfield University, 2014. http://dspace.lib.cranfield.ac.uk/handle/1826/9205.
Повний текст джерелаXimenes, Fernando Silveira. "Design de difusor aerodinâmico compacto para uma turbina eólica de pequena escala." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/182436.
Повний текст джерелаThis work aims to develop a compact wind turbine for a turbine and a small scale, aiming at a better rotational start at low wind speeds (lower starting torque to rotate). A diffuser is a rim-shaped structure wrapped around the wind turbine rotor, its function is to amplify the wind uptake and acceleration, exploiting the aerodynamic effects of the low-pressure vortex zones at the diffuser outlet. The study will focus on the manipulation of the diffuser geometry, analyzing how its design impacts on its aerodynamic behavior, especially on the diffuser's ability to equate the high and low pressure zones along its structure, this relation is decisive for the aerodynamic effect that accelerates the air flow, resulting in a rotational start at low wind speeds. The basis for this work are studies developed by Ohya et al. (2010) on compact-flanged diffusers for wind turbines, called Wind-lens Technology. To achieve the objectives, this research will use CFD simulations with virtual wind tunnel software and experimental tests in physical wind tunnel to evaluate the dynamic behavior (turbine + diffuser). Nineteen geometries were developed from a standardized design area for the design of diffusers. An MFI (internal flow microseparator) has also been developed, which is an additional structure whose function is to potentiate the low pressure zones of the diffusers. The results showed that the manipulation of the diffuser geometry produced promising results in comparison to the reference model, reaching in some conditions superior results in RPM and initial start. The MFI proved to be effective in boosting the low pressure zones and improved the initial start. At the end, two models of diffusers and their respective versions with MFI were defined as the best options for the initial start.
Taylor, D. "The design and testing of a horizontal axis wind turbine with sailfoil blades." Thesis, Open University, 1985. http://oro.open.ac.uk/54193/.
Повний текст джерелаVianna, Neto Julio Xavier. "Wind turbine blade geometry design based on multi-objective optimization using metaheuristics." reponame:Repositório Institucional da UFPR, 2013. http://hdl.handle.net/1884/30337.
Повний текст джерелаShih, Sung-Hua, and 施松樺. "Wind Turbine Blade Design and Analysis." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/98290356246100649174.
Повний текст джерела國立屏東科技大學
機械工程系
94
In recent years, we have been facing gradual shortages of fossil fuels; as a result, prices have risen rapidly. Various governments have been doing their utmost to seek, and develop, alternative source of energy. At present, the wind turbine has the most advanced technology among all of the alternative energy devices, as well as low pollution levels and limitless regeneration. In this paper, we show the design of a wind turbine blade that can best generate electric power. This paper utilizes commercial software GAMBIT and FLUENT, to built and analyze model flow fields. The NACA-4412 airfoil was chosen as the study’s designed wind turbine blade. We show how to design section pitch angle, and angle of attack, by analyzing various relative wind velocity angles, to influent the blade. The result indicates that the wind turbine blade based on the Betz optimum blade design, i.e. the blade with twist angle, will generate more electric power than will blades with no twist angle.
Huang, Jyun-Lin, and 黃俊霖. "Creative Design of Wind Turbine Drive Mechanism." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/67454428455641144498.
Повний текст джерела崑山科技大學
機械工程研究所
105
Being an island surrounded by sea water, Taiwan is abundant in natural and stable wind energy resources. Wind turbine generator installation is therefore a promising industry in Taiwan. Traditional wind turbine generator has gearbox to increase or reduce speed, so wind speed application range is narrow, lower or higher wind speed cannot be used. This paper focuses on CVT used in the wind turbine generator, and servomotor controls the speed ratio of the CVT, so the wind speed application range is wider. Control system design includes the stable speed ratio control and power-split control strategy for the CVT, the generator can have the stable speed and power-split function, so the optimal efficiency of generation can be obtained. In the end, this paper further discusses the creative design for the CVT system used in the wind turbine generator and its future application.
Tan, Hao, and 譚皓. "A Study of Wind-Resistant Design Codes for Wind Turbine Towers." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/12478651261590995319.
Повний текст джерела國立臺灣海洋大學
河海工程學系
99
Taiwan is an island which located in tropical cyclone position in the Pacific monsoon belt. Taiwan’s wind conditions influence by the sea and the land of great. There have the strong northeast monsoon in winter, the southwest monsoon and typhoon comes in summer. Each of these forces of nature are a threat and damage to Taiwan’s buildings. Because of greenhouse effect and global warming, scientists are frantically looking for combination of renewable energy. Although Taiwan gets threat by the hurricane, but enjoy the unique wind conditions. Natural, environmentally friendly, non-polluting wind resources, can help Taiwan open another piece of the sky. In order to ensure that people's lives and property, and taking into account the economic and social development considerations, one can effectively reduce hurricane damage, and also meet the needs of society and people expect the wind-resistant design specifications, without saying the importance. In this study, ultra-high-type buildings will be designed based on wind resistance, especially in the structure of ultra-high wind turbine tower, and will focus on the wind turbine tower by the different states under the action of wind-induced, resulting in the failure mechanism and its dynamic behavior analysis. It hopes this study and discussion of the results, enabling the country's future on the wind turbine tower design-related research in the field, can be beneficial and help.
Phillips, Derek Grant. "An investigation on diffuser augmented wind turbine design." 2003. http://hdl.handle.net/2292/1940.
Повний текст джерелаChou, Hsin-Hsien, and 周欣賢. "Small Wind Turbine blades Design and Performance analysis." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/62020228480802550778.
Повний текст джерела中華技術學院
飛機系統工程研究所
96
ABSTRACT The present research is to address the new innovation of wind turbine blade design in order to maximize the capacity of 1KW of Whisper-H80 wind turbine blades by redesigning the turbine blades with light weight composite material. Series tests of newly designed turbine blades were conducted under the circumstance of artificial wind. Carefully compared and evaluated the relationship of the power generated by the wind turbine with the angles variation of the blades. Modifications of the blade’s angle and output loading could bring out the maximum efficiency of the wind turbine. The aerodynamic analysis of turbine blades was based on self-developed unsteady flow field equations. However, to analyze aerodynamic characteristics of the blades, the two-dimensional airfoil section values were first simulated. According to the aerodynamic characteristics of wind angle of attack, based on the Blade Element Momentum Theory, a detailed aerodynamic analysis as well as the ideal power generation efficiency could be calculated by studying the rotation speed of turbine blades with regard to the wind speed and the setting angles. The turbine blades were first designed and produced according to the best geometric appearance to the public. The wind turbine blades were made by high strength and lower weight composite material which was affiliated with ply by dry-type long fiber fabrics being the structural shape of the blades’ main body. By comparing hand lay-up method and resin transfer molding method of enhancing the wind turbine blades strength, we decided that hand lay-up method should have been the final method because this method not only reduced weight, but it also brought out maximum hardness on the final products.