Wind Energy Methods For Computation Of Wave Forcing And The Resulting Motion Of A Slender Offshore Floating Structure

Author : Olga Glöckner
Publisher : GRIN Verlag
Page : 145 pages
File Size : 43,9 Mb
Release : 2018-07-19
Category : Technology & Engineering
ISBN : 9783668754782

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Wind energy. Methods for computation of wave forcing and the resulting motion of a slender offshore floating structure by Olga Glöckner Pdf

Academic Paper from the year 2014 in the subject Engineering - Civil Engineering, grade: 1,0, University of Hannover (A&M University Texas, Ludwig-Franzius-Institut für Wasserbau, Ästuar- und Küsteningenieurwesen), language: English, abstract: This thesis investigates how wave loads act on an OC3 Hywind spar-buoy. The author analyzes the resulting motions of the support platform. This work also contains a detailed presentation of the topic with useful additional information and graphics. Unlike fossil fuels (like oil, coal and natural gas), wind energy is a renewable energy resource. Since winds at sea are stronger and more consistent than onshore winds, the demand for offshore wind turbines has increased over the last years. As energy can be produced more efficient in deeper water, several floating offshore wind turbine constructions, such as the OC3 Hywind spar-buoy, have been proposed. The design of floating wind turbines depends on the simulation of the system behavior caused by exciting forces. A general overview of regular and irregular waves as well as hydrostatic and hydrodynamic loads acting on floating structures is given in chapter 2. Furthermore, essential formulations for calculating motions of FOWTs are given at the end of this chapter. Since all simulations carried out in this thesis are based on the OC3 Hywind concept, detailed information about this floating wind turbine model are given in chapter 3. Three different methods are used for the estimation of wave induced loads and motions. Section 4 describes a modified Morison formulation in the time domain which is applied by the commercially available software MATLAB. On the basis of the diffraction theory the commercial offshore software package SESAM simulates wave excitation forces and responding motions which are presented and discussed in chapter 5. The third method is the open source code FAST that computes wave induced loads and motions based on the first-order potential theory and Kane’s equation of motion. Basic formulations used in FAST and essential hydrodynamic results are shown in chapter 6. The comparisons between the simulations of the three programs are represented and the individual results are analyzed in chapter 7.

Author : Olga Glöckner
Publisher : GRIN Verlag
Page : 14 pages
File Size : 40,8 Mb
Release : 2018-05-18
Category : Technology & Engineering
ISBN : 9783668706149

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Comparison of methods for the computation of wave forcing by Olga Glöckner Pdf

Presentation slides from the year 2014 in the subject Engineering - Civil Engineering, grade: 1,0, University of Hannover, language: English, abstract: Unlike fossil fuels (e.g. oil, coal and natural gas), wind energy is a renewable energy resource. Since winds at sea are stronger and more consistent than onshore winds, the demand for offshore wind turbines has increased over the last years. As energy can be produced more efficient in deeper water, several floating offshore wind turbine constructions, such as the OC3 Hywind spar-buoy, have been proposed. The design of floating wind turbines depends on the simulation of the system behavior caused by exciting forces. This thesis deals with the comparison between different methods for calculating wave forces and resulting platform motions of a floating offshore wind turbine. On the one hand, wave exciting loads computed with Morison’s equation are compared to the hydrodynamic forces simulated by the open source code FAST on the basis of the diffraction theory. On the other hand, response motions of the floating structure are simulated by the commercial offshore software SESAM in the frequency domain and compared with the motions calculated by FAST in the time domain.

Author : Olga Glöckner
Publisher : GRIN Verlag
Page : 131 pages
File Size : 42,8 Mb
Release : 2018-05-17
Category : Technology & Engineering
ISBN : 9783668705227

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A comparison of methods for computation of wave forcing by Olga Glöckner Pdf

Diploma Thesis from the year 2014 in the subject Engineering - Civil Engineering, grade: 1,0, University of Hannover (A&M University Texas, Ludwig-Franzius-Institut für Wasserbau, Ästuar- und Küsteningenieurwesen), language: English, abstract: Unlike fossil fuels (for example oil, coal and natural gas), wind energy is a renewable energy resource. Since winds at sea are stronger and more consistent than onshore winds, the demand for offshore wind turbines has increased over the last years. As energy can be produced more efficient in deeper water, several floating offshore wind turbine constructions, such as the OC3 Hywind spar-buoy, have been proposed. The design of floating wind turbines depends on the simulation of the system behavior caused by exciting forces. This thesis deals with the comparison between different methods for calculating wave forces and resulting platform motions of a floating offshore wind turbine. On the one hand, wave exciting loads computed with Morison’s equation are compared to the hydrodynamic forces simulated by the open source code FAST on the basis of the diffraction theory. On the other hand, response motions of the floating structure are simulated by the commercial offshore software SESAM in the frequency domain and compared with the motions calculated by FAST in the time domain.

Author : Joao Cruz,Mairead Atcheson
Publisher : Springer
Page : 341 pages
File Size : 40,7 Mb
Release : 2016-08-20
Category : Technology & Engineering
ISBN : 9783319293981

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Floating Offshore Wind Energy by Joao Cruz,Mairead Atcheson Pdf

This book provides a state-of-the-art review of floating offshore wind turbines (FOWT). It offers developers a global perspective on floating offshore wind energy conversion technology, documenting the key challenges and practical solutions that this new industry has found to date. Drawing on a wide network of experts, it reviews the conception, early design stages, load & structural analysis and the construction of FOWT. It also presents and discusses data from pioneering projects. Written by experienced professionals from a mix of academia and industry, the content is both practical and visionary. As one of the first titles dedicated to FOWT, it is a must-have for anyone interested in offshore renewable energy conversion technologies.

Author : Enzo Marino
Publisher : Firenze University Press
Page : 232 pages
File Size : 45,9 Mb
Release : 2010
Category : Coastal engineering
ISBN : 9788866550518

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An Integrated Nonlinear Wind-Waves Model for Offshore Wind Turbines by Enzo Marino Pdf

This thesis presents a numerical model capable of simulating offshore wind turbines exposed to extreme loading conditions. External condition-based extreme responses are reproduced by coupling a fully nonlinear wave kinematic solver with a hydro-aero-elastic simulator. First, a two-dimensional fully nonlinear wave simulator is developed. The transient nonlinear free surface problem is formulated assuming the potential theory and a high-order boundary element method is implemented to discretize Laplace's equation. For temporal evolution a second-order Taylor series expansion is used. The code, after validation with experimental data, is successfully adopted to simulate overturning plunging breakers which give rise to dangerous impact loads when they break against wind turbine substructures. Emphasis is then placed on the random nature of the waves. Indeed, through a domain decomposition technique a global simulation framework embedding the numerical wave simulator into a more general stochastic environment is developed. The proposed model is meant as a contribution to meet the more and more pressing demand for research in the offshore wind energy sector as it permits taking into account dangerous effects on the structural response so as to increase the global structural safety level.

Author : Anonim
Publisher : Unknown
Page : 1268 pages
File Size : 45,5 Mb
Release : 1979
Category : Petroleum
ISBN : STANFORD:36105007714707

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Petroleum Abstracts by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 1528 pages
File Size : 48,8 Mb
Release : 1989
Category : Petroleum
ISBN : STANFORD:36105007711778

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Petroleum Abstracts. Literature and Patents by Anonim Pdf

Author : Charalambos Baniotopoulos,Claudio Borri,Theodore Stathopoulos
Publisher : Springer Science & Business Media
Page : 353 pages
File Size : 52,9 Mb
Release : 2011-12-01
Category : Technology & Engineering
ISBN : 9783709109533

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Environmental Wind Engineering and Design of Wind Energy Structures by Charalambos Baniotopoulos,Claudio Borri,Theodore Stathopoulos Pdf

The book presents a state-of-the-art in environmental aerodynamics and the structural design of wind energy support structures, particularly from a modern computational perspective. Examples include real-life applications dealing with pollutant dispersion in the building environment, pedestrian-level winds, comfort levels, relevant legislation and remedial measures. Design methodologies for wind energy structures include reliability assessment and code frameworks.

Author : Wiesław Ostachowicz,Malcolm McGugan,Jens-Uwe Schröder-Hinrichs,Marcin Luczak
Publisher : Springer
Page : 432 pages
File Size : 53,9 Mb
Release : 2016-08-30
Category : Technology & Engineering
ISBN : 9783319390956

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MARE-WINT by Wiesław Ostachowicz,Malcolm McGugan,Jens-Uwe Schröder-Hinrichs,Marcin Luczak Pdf

This book provides a holistic, interdisciplinary overview of offshore wind energy, and is a must-read for advanced researchers. Topics, from the design and analysis of future turbines, to the decommissioning of wind farms, are covered. The scope of the work ranges from analytical, numerical and experimental advancements in structural and fluid mechanics, to novel developments in risk, safety & reliability engineering for offshore wind.The core objective of the current work is to make offshore wind energy more competitive, by improving the reliability, and operations and maintenance (O&M) strategies of wind turbines. The research was carried out under the auspices of the EU-funded project, MARE-WINT. The project provided a unique opportunity for a group of researchers to work closely together, undergo multidisciplinary doctoral training, and conduct research in the area of offshore wind energy generation. Contributions from expert, external authors are also included, and the complete work seeks to bridge the gap between research and a rapidly-evolving industry.

Author : Anonim
Publisher : Unknown
Page : 444 pages
File Size : 51,6 Mb
Release : 1988
Category : Ocean engineering
ISBN : UCSD:31822005663174

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OTC 20-year Index, 1969-1988 by Anonim Pdf

Author : James F. Manwell,Emmanuel Branlard,Jon G. McGowan,Bonnie Ram
Publisher : John Wiley & Sons
Page : 853 pages
File Size : 43,6 Mb
Release : 2024-04-30
Category : Science
ISBN : 9781119367475

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Wind Energy Explained by James F. Manwell,Emmanuel Branlard,Jon G. McGowan,Bonnie Ram Pdf

WIND ENERGY EXPLAINED Authoritative and bestselling textbook detailing the many aspects of using wind as an energy source Wind Energy Explained provides complete and comprehensive coverage on the topic of wind energy, starting with general concepts like the history of and rationale for wind energy and continuing into specific technological components and applications along with the new recent developments in the field. Divided into 16 chapters, this edition includes up-to-date data, diagrams, and illustrations, boasting an impressive 35% new material including new sections on metocean design conditions, wind turbine design, wind power plants and the electrical system, fixed and floating offshore wind turbines, project development, permitting and environmental risks and benefits, turbine installation, operation and maintenance, and high penetration wind energy systems and power-to-X. Wind Energy Explained also includes information on: Modern wind turbines, covering the design and their many components such as the rotor, drive train, and generator Aerodynamics of wind energy, covering one-dimensional momentum theory, the Betz limit, and ideal horizontal axis wind turbine with wake rotation Environmental external design conditions, such as wind, waves, currents, tides, salinity, floating ice, and many more Commonly used materials and components, such as steel, composites, copper, and concrete, plus machinery elements, such as shafts, couplings, bearings, and gears Modern design methods, including probabilistic design Environmental effects and mitigation strategies for wind project siting and the role of public engagement in the development process This book offers a complete examination of one of the most promising sources of renewable energy and is a great introduction to this cross-disciplinary field for practicing engineers. It may also be used as a textbook resource for university level courses in wind energy, both introductory and advanced.

Author : Finn Gunnar Nielsen
Publisher : Cambridge University Press
Page : 395 pages
File Size : 52,5 Mb
Release : 2024-02-29
Category : Science
ISBN : 9781009341448

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Offshore Wind Energy by Finn Gunnar Nielsen Pdf

Many countries have plans to expand wind energy to meet CO2 emissions targets. Lack of available land area and the need for good and stable wind conditions have stimulated the development of offshore wind turbines, which allows for the development of larger turbines. The offshore environment, however, involves new challenges related to the design, installation, operation and maintenance of the turbines. Based on a graduate-level course taught by the author, this book focuses on the opportunities and challenges related to offshore wind turbines. It introduces the offshore environment, including wind and wave dynamics, before discussing the aerodynamics of wind turbines, hydrodynamic loading, marine operations, and wind farm layout. Featuring examples that demonstrate practical application of the topics covered and exercises to consolidate student understanding, this is an indispensable reference text for advanced students and researchers of environmental science and engineering and for industry professionals working in the wind energy sector.

Author : Tony Burton,Nick Jenkins,David Sharpe,Ervin Bossanyi
Publisher : John Wiley & Sons
Page : 784 pages
File Size : 52,5 Mb
Release : 2011-06-13
Category : Technology & Engineering
ISBN : 9780470699751

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Wind Energy Handbook by Tony Burton,Nick Jenkins,David Sharpe,Ervin Bossanyi Pdf

Named as one of Choice's Outstanding Academic Titles of 2012 Every year, Choice subject editors recognise the most significant print and electronic works reviewed in Choice during the previous calendar year. Appearing annually in Choice's January issue, this prestigious list of publications reflects the best in scholarly titles and attracts extraordinary attention from the academic library community. The authoritative reference on wind energy, now fully revised and updated to include offshore wind power A decade on from its first release, the Wind Energy Handbook, Second Edition, reflects the advances in technology underpinning the continued expansion of the global wind power sector. Harnessing their collective industrial and academic expertise, the authors provide a comprehensive introduction to wind turbine design and wind farm planning for onshore and offshore wind-powered electricity generation. The major change since the first edition is the addition of a new chapter on offshore wind turbines and offshore wind farm development. Opening with a survey of the present state of offshore wind farm development, the chapter goes on to consider resource assessment and array losses. Then wave loading on support structures is examined in depth, including wind and wave load combinations and descriptions of applicable wave theories. After sections covering optimum machine size and offshore turbine reliability, the different types of support structure deployed to date are described in turn, with emphasis on monopiles, including fatigue analysis in the frequency domain. Final sections examine the assessment of environmental impacts and the design of the power collection and transmission cable network. New coverage features: turbulence models updated to reflect the latest design standards, including an introduction to the Mann turbulence model extended treatment of horizontal axis wind turbines aerodynamics, now including a survey of wind turbine aerofoils, dynamic stall and computational fluid dynamics developments in turbine design codes techniques for extrapolating extreme loads from simulation results an introduction to the NREL cost model comparison of options for variable speed operation in-depth treatment of individual blade pitch control grid code requirements and the principles governing the connection of large wind farms to transmission networks four pages of full-colour pictures that illustrate blade manufacture, turbine construction and offshore support structure installation Firmly established as an essential reference, Wind Energy Handbook, Second Edition will prove a real asset to engineers, turbine designers and wind energy consultants both in industry and research. Advanced engineering students and new entrants to the wind energy sector will also find it an invaluable resource.

Author : Tony L. Burton,Nick Jenkins,Ervin Bossanyi,David Sharpe,Michael Graham
Publisher : John Wiley & Sons
Page : 1008 pages
File Size : 54,8 Mb
Release : 2021-04-22
Category : Science
ISBN : 9781119451150

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Wind Energy Handbook by Tony L. Burton,Nick Jenkins,Ervin Bossanyi,David Sharpe,Michael Graham Pdf

Fully updated and authoritative reference to wind energy technology written by leading academic and industry professionals The newly revised Third Edition of the Wind Energy Handbook delivers a fully updated treatment of key developments in wind technology since the publication of the book’s Second Edition in 2011. The criticality of wakes within wind farms is addressed by the addition of an entirely new chapter on wake effects, including ‘engineering’ wake models and wake control. Offshore, attention is focused for the first time on the design of floating support structures, and the new ‘PISA’ method for monopile geotechnical design is introduced. The coverage of blade design has been completely rewritten, with an expanded description of laminate fatigue properties and new sections on manufacturing methods, blade testing, leading-edge erosion and bend-twist coupling. These are complemented by new sections on blade add-ons and noise in the aerodynamics chapters, which now also include a description of the Leishman-Beddoes dynamic stall model and an extended introduction to Computational Fluid Dynamics analysis. The importance of the environmental impact of wind farms both on- and offshore is recognized by expanded coverage, and the requirements of the Grid Codes to ensure wind energy plays its full role in the power system are described. The conceptual design chapter has been extended to include a number of novel concepts, including low induction rotors, multiple rotor structures, superconducting generators and magnetic gearboxes. References and further reading resources are included throughout the book and have been updated to cover the latest literature. As in previous editions, the core subjects constituting the essential background to wind turbine and wind farm design are covered. These include: The nature of the wind resource, including geographical variation, synoptic and diurnal variations, and turbulence characteristics The aerodynamics of horizontal axis wind turbines, including the actuator disc concept, rotor disc theory, the vortex cylinder model of the actuator disc and the Blade-Element/Momentum theory Design loads for horizontal axis wind turbines, including the prescriptions of international standards Alternative machine architectures The design of key components Wind turbine controller design for fixed and variable speed machines The integration of wind farms into the electrical power system Wind farm design, siting constraints, and the assessment of environmental impact Perfect for engineers and scientists learning about wind turbine technology, the Wind Energy Handbook will also earn a place in the libraries of graduate students taking courses on wind turbines and wind energy, as well as industry professionals whose work requires a deep understanding of wind energy technology.

Author : Mareike Leimeister
Publisher : Springer Nature
Page : 336 pages
File Size : 53,9 Mb
Release : 2023-01-01
Category : Technology & Engineering
ISBN : 9783030968892

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Reliability-Based Optimization of Floating Wind Turbine Support Structures by Mareike Leimeister Pdf

This book pursues the ambitious goal of combining floating wind turbine design optimization and reliability assessment, which has in fact not been done before. The topic is organized into a series of very ambitious objectives, which start with an initial state-of-the-art review, followed by the development of high-fidelity frameworks for a disruptive way to design next generation floating offshore wind turbine (FOWT) support structures. The development of a verified aero-hydro-servo-elastic coupled numerical model of dynamics for FOWTs and a holistic framework for automated simulation and optimization of FOWT systems, which is later used for the coupling of design optimization with reliability assessment of FOWT systems in a computationally and time-efficient manner, has been an aim of many groups internationally towards implementing a performance-based/goal-setting approach in the design of complex engineering systems. The outcomes of this work quantify the benefits of an optimal design with a lower mass while fulfilling design constraints. Illustrating that comprehensive design methods can be combined with reliability analysis and optimization algorithms towards an integrated reliability-based design optimization (RBDO) can benefit not only the offshore wind energy industry but also other applications such as, among others, civil infrastructure, aerospace, and automotive engineering.