Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 146 for “"Offshore wind"”.
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Optimisation of offshore wind farm maintenance.
The installed capacity of European Offshore Wind Turbines (OWT) is likely to rise from the 2014 value of 7GW to 150GW in 2030. However maintenance of OWT is facing unprecedented challenges and cost 35% of lifetime costs. This will be equivalent to £14billion/year by 2030 if current OWT maintenance …
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Foundations for an offshore wind turbine
… Renewable energy sources, such as solar and wind, are abundant but have very low power densities. The US is in the process of approving its first offshore wind farm, located in Nantucket Sound. Geotechnical factors will play a large role in the development of offshore wind projects due to the …
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Wave loads on offshore wind turbines
… most important sources of alternative energy and offshore floating wind turbines are considered viable and economical means of harnessing ocean energy. The accurate prediction of nonlinear hydrodynamic wave loads and the resulting nonlinear motion and tether tension is of crucial importance in the …
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Harmonic propagation studies in offshore wind power clusters
… that suggests a set of configurations in large offshore wind power clusters to maintain harmonics at levels that let the clusters operate without operational problems caused by harmonics. The major case studies of harmonics in offshore wind farms are focused on the importance of harmonic …
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Monopile Foundation Offshore Wind Turbine Simulation and Retrofitting
<p>Offshore wind turbines (OWT) provide a renewable source of energy with great proximity to many large cities. This has caused a major increase in OWT development and implementation, primarily in Europe, but spreading throughout the world. There are a multitude of different foundation options, …
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Innovative hull design for servicing offshore wind turbines
… maintenance is a key operational issue for an offshore wind farm. Currently there is a 1.5m significant wave height (Hs) limit for the standard “step over” method of transferring personnel to an offshore wind turbine, though this varies with, vessel type, wave period and direction, as well as …
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Offshore wind potential in North Carolina and possible configuratons
… Coast of the United States begins development of offshore wind power, utility companies want estimations of the energy to be gained and the costs associated with harnessing that power. As a resident of coastal North Carolina, I would much rather see our homes powered by offshore turbines rather …
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Digitalization of supply chain in the offshore wind sector.
The offshore wind sector (OSWS) has flourished in recent years generating 68 Giga Watts (GW) of electricity globally in 2024. However, this is incommensurate with the net zero target set by the International Renewable Energy Agency (IRNEA) in conjunction with the Global Wind Energy Council (GWEC) …
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Offshore wind turbine nonlinear wave loads and their statistics
… influence of lateral flexible vibrations on offshore wind turbine foundations and the higher natural frequencies of the offshore wind turbine foundation relative to the dominant frequencies of the linear wave load model, the modeling of the dynamic behavior of the foundation under nonlinear …
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Modelling the marine boundary layer for offshore wind power utilisation
For planning and operation of offshore wind farms a profound knowledge of the meteorological conditions is indispensable. This thesis is concerned with modelling the structure of the marine atmospheric boundary layer, with focus on effects, which are important for wind resource assessment. Data …
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Predicting Interference Patterns Between Offshore Wind Farms through Wake Analysis
… the wake effect from a cluster of large-scale offshore wind turbines with the purpose of optimizing spacing between separate farms to avoid wake interference. Placing wind turbines within a field of disturbed flow decreases power output, and in some cases, threatens structural integrity. …
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Quantifying emissions reductions from New England offshore wind energy resources
… further evaluated by applying them to potential offshore wind energy resources in New England, including the proposed Cape Wind project.
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Extended tension leg platform design for offshore wind turbine systems
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 …
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Techno-economic analysis of green ammonia production using offshore wind farms
… for the conversion facilities: i) utterly offshore ammonia production, ii) utterly onshore ammonia production, and iii) offshore hydrogen production, followed by onshore conversion into ammonia. Four different interconnecting infrastructures are considered for the energy distribution: i) …
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Structural fatigue assessment and optimisation of offshore wind turbine jacket foundations.
Offshore Wind Turbine (OWT) is an expensive type of renewable energy system, and there is a continuous effort to lower the capital and operational costs. Jacket foundations are increasingly used in offshore wind due to their relatively light weight and adaptability in deep waters. However, the …
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Cost of energy modelling and reduction opportunities for offshore wind turbines
The cost of generating electricity from wind turbines, particularly offshore wind turbines is currently too high. To ensure offshore wind energy is truly competitive with traditional fossil fuel and nuclear energy generation, the true cost of offshore wind energy and ways of reducing that cost must …
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Integrated Design and Optimization of Mooring Systems for Offshore Wind Platforms
L'abstract è presente nell'allegato / the abstract is in the attachment
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Human Factors in the Operation and Maintenance of Offshore Wind Farms
… tools used in the operations and maintenance of offshore wind farms rarely account for the welfare of technicians and their ability to do work upon arrival. This creates uncertainties especially since current operational limits might make a wind farm accessible but vibrations from transits might …
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Cyclic behaviour of monopile foundations for offshore wind turbines in clay
Investment into offshore wind farms has been growing to address the growing threat of climate change. The majority of offshore wind turbines (both current and planned) are founded on monopiles, large circular steel pipe piles ranging from 4.0 m – 7.5 m in diameter. Based on available borehole …
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