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Full-Text Articles in Mechanical Engineering
Multi Rotor Wind Turbine Design And Cost Scaling, Preeti Verma
Multi Rotor Wind Turbine Design And Cost Scaling, Preeti Verma
Masters Theses 1911 - February 2014
The current generation wind turbines are upscaled into multi megawatt range in terms of output power. However, the energy benefit from the turbine is offset by the increased mass and cost. Twenty MW wind turbines are now feasible with rotor diameters up to 200 m, according to a new report from the EU-funded UpWind project in 2011. The question is, how much bigger can wind turbines get realistically? One concept worth considering, and the one that is the subject of this thesis, is to have more than one rotor on a single support structure. Such turbines could have a greater …
Load Reduction Of Floating Wind Turbines Using Tuned Mass Dampers, Gordon M. Stewart
Load Reduction Of Floating Wind Turbines Using Tuned Mass Dampers, Gordon M. Stewart
Masters Theses 1911 - February 2014
Offshore wind turbines have the potential to be an important part of the United States' energy production profile in the coming years. In order to accomplish this wind integration, offshore wind turbines need to be made more reliable and cost efficient to be competitive with other sources of energy. To capitalize on high speed and high quality winds over deep water, floating platforms for offshore wind turbines have been developed, but they suffer from greatly increased loading. One method to reduce loads in offshore wind turbines is the application of structural control techniques usually used in skyscrapers and bridges. Tuned …
Vibration Reduction Of Offshore Wind Turbines Using Tuned Liquid Column Dampers, Colin Roderick
Vibration Reduction Of Offshore Wind Turbines Using Tuned Liquid Column Dampers, Colin Roderick
Masters Theses 1911 - February 2014
Offshore wind turbines (OWTs) are becoming an accepted method for generating electricity. The environmental conditions of offshore locations often impose high wind and wave forces on OWTs making them susceptible to intense loading and undesirable vibrations. One method to reduce system vibrations is through the use of structural control devices typically utilized in civil structures. Tuned liquid column dampers (TLCDs) show great promise in the application to OWTs due to their high performance and low cost. This thesis examines the use of TLCDs in OWTs.
Equations of motion for limited degree-of-freedom TLCD-turbine models are presented. A baseline analysis of each …