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Wind Turbines

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ISBN: 9783038973607 / 9783038973614 Year: Pages: 328 DOI: 10.3390/books978-3-03897-361-4 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Electrical and Nuclear Engineering
Added to DOAB on : 2019-01-11 09:36:07
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This issue is a continuation of the previous successful Special Issue “Wind Turbines 2013”. Similarly, this issue also focuses on recent advances in the wind energy sector on a wide range of topics, including: wind resource mapping, wind intermittency issues, aerodynamics, foundations, aeroelasticity, wind turbine technologies, control of wind turbines, diagnostics, generator concepts including gearless concepts, power electronic converters, grid interconnection, ride-through operation, protection, wind farm layouts - optimization and control, reliability, operations and maintenance, effects of wind farms on local and global climate, wind power stations, smart-grid and micro-grid related to wind turbine operation.

Voices of the Land: The Seed Savers and Other Plays

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Book Series: Canadian Plays ISSN: 19175094 ISBN: 9781926836935 9781926836942 9781926836942 Year: Pages: 218 Language: English
Publisher: Athabasca University Press
Subject: Performing Arts
Added to DOAB on : 2012-07-11 08:18:41
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The sound of the wind across a Prairie field, the smell of grass on the first day of spring, the vocalization of birds in the early morning woods, the silence of the lake at night interrupted by call of the loon ? these are the shapes and sounds of the Prairie landscape. Katherine Koller invokes the Prairie setting as a central character in each of the four plays in Voices of the Land. Serving a supportive and, at other times, antagonistic role, the landscape acts upon the characters, driving and intensifying their transformation. The land and those who live in intimate terms with it are the focus of Koller?s plays. In The Seed Savers, farmers face pressure to purchase genetically modified seed; a protagonist refuses to sell untilled land for development in Cowboy Boots and a Corsage; a dying woman sees a lake as her final resting place in Abby?s Place; and in The Early Worm Club, Millie realizes a deep sense of belonging to the Alberta parkland and its birds while searching for her mate. Nature goes beyond mere setting and backdrop in these plays to effect transformation and resolution on the characters. Ranging from romantic comedy to drama and from one-act to full-length, the plays in Voices of the Land show western Canadians at the point of leaving, returning, and renewing against the backdrop of their native landscape.

Keywords

Drama --- Alberta author --- Wind --- prairies

Large-Scale and Full-Scale Methods for Examining Wind Effects on Buildings

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889455102 Year: Pages: 143 DOI: 10.3389/978-2-88945-510-2 Language: English
Publisher: Frontiers Media SA
Subject: General and Civil Engineering --- Environmental Engineering
Added to DOAB on : 2019-01-23 14:53:42
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Global economic losses due to severe weather events have grown dramatically over the past two decades. A large proportion of these losses are due to severe wind storms such as tropical cyclones and tornadoes, which can cause destruction to buildings, houses, and other infrastructure over large areas. To address the growing losses, many new large-scale and full-scale laboratories have been developed. These tools are used to examine the issues that could not be solved with the traditional tools of wind engineering including model-scale boundary layer wind tunnels, simplified standardized product tests, and other methods of analysis. This book presents state-of-the-art results from the development of the many novel approaches being used to mitigate natural disasters around the world.

Der Schutz von Natura-2000-Gebieten bei Errichtung und Betrieb von Offshore-Windkraftanlagen - Eine Untersuchung der Tragweite des Habitatschutzrechts auf erteilte und zu erteilende Genehmigungen von Offshore-Windparks

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ISBN: 9783863951917 Year: DOI: 10.17875/gup2015-808 Language: German
Publisher: Universitätsverlag Göttingen
Subject: Law
Added to DOAB on : 2016-06-21 11:01:46
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Die Frage nach dem Schutz von Natura-2000-Gebieten bei Errichtung und Betrieb von Offshore-Windkraftanlagen verknüpft eines der bedeutendsten Problemfelder des Naturschutzrechts mit der Diskussion um die Windenergienutzung zur See als Kernbaustein der Energiewende. Die vorliegende Dissertation arbeitet zur Beantwortung dieser Fragestellung die relevanten Regelungen heraus und untersucht deren Auswirkungen auf die Genehmigungen von Offshore-Windparks. Im Einzelnen erfolgt unter anderem eine Erörterung der mit der Genehmigung von Offshore-Windenergieanlagen verbundenen Rechtsfragen sowie die Ermittlung und Einordnung der im Meeresbereich entstandenen und unter Schutz gestellten Natura-2000-Gebiete. Einen weiteren Schwerpunkt der Arbeit bildet die Handhabung des auf Art. 6 Abs. 3 der Flora-Fauna-Habitat-Richtlinie zurückzuführenden Schutzreglements für Natura-2000-Gebiete und die Prüfung der Möglichkeit einer Abweichungsentscheidung nach Art. 6 Abs. 4 der Flora-Fauna-Habitat-Richtlinie. Darüber hinaus wendet sich die Arbeit der Frage zu, inwieweit das Habitatschutzrecht auch für bereits erteilte Genehmigungen für Offshore-Windkraftanlagen von Bedeutung ist und wie entsprechende Pflichten im nationalen Recht zu berücksichtigen sind.

Wind Systems in the Dead Sea and Footprints in Seismic Records

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Book Series: Wissenschaftliche Berichte des Instituts für Meteorologie und Klimaforschung des Karlsruher Instituts für Technologie ISSN: 01795619 ISBN: 9783731505969 Year: Volume: 70 Pages: VI, 247 p. DOI: 10.5445/KSP/1000060565 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Physics (General)
Added to DOAB on : 2019-07-30 20:01:59
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Atmospheric processes, such as wind, impact the ground motion of the earth and have the potential to induce strong broad-band noise in seismological records. In order to quantify the influence of wind on ground motion velocity joint seismological and meteorological measurements were conducted at the Dead Sea.Results reveal a pronounced impact of wind on seismological records. A methodology is presented to account for the dependency of PSD of ground motion velocity on the horizontal wind field.

Remote Sensing of Atmospheric Conditions for Wind Energy Applications

Authors: ---
ISBN: 9783038979425 / 9783038979432 Year: Pages: 290 DOI: 10.3390/books978-3-03897-943-2 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General)
Added to DOAB on : 2019-06-26 08:44:06
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This Special Issue “Atmospheric Conditions for Wind Energy Applications” hosts papers on aspects of remote sensing for atmospheric conditions for wind energy applications. Wind lidar technology is presented from a theoretical view on the coherent focused Doppler lidar principles. Furthermore, wind lidar for applied use for wind turbine control, wind farm wake, and gust characterizations is presented, as well as methods to reduce uncertainty when using lidar in complex terrain. Wind lidar observations are used to validate numerical model results. Wind Doppler lidar mounted on aircraft used for observing winds in hurricane conditions and Doppler radar on the ground used for very short-term wind forecasting are presented. For the offshore environment, floating lidar data processing is presented as well as an experiment with wind-profiling lidar on a ferry for model validation. Assessments of wind resources in the coastal zone using wind-profiling lidar and global wind maps using satellite data are presented..

Keywords

detached eddy simulation --- turbulence --- Lidar --- range gate length --- wind energy resources --- QuikSCAT --- WindSAT --- ASCAT --- global ocean --- wind energy --- resource assessment --- power performance testing --- wind turbine controls --- complex flow --- Doppler lidar --- coherent Doppler lidar --- wind sensing --- single-particle --- wind gusts --- Doppler lidar --- detecting and tracking --- impact prediction --- wind energy --- atmospheric boundary layer --- wind turbine wake --- wind lidar --- turbulence --- wake modeling --- field experiments --- wind energy --- atmospheric boundary layer --- wind turbine wake --- wind lidar --- virtual lidar --- turbulence --- wake modeling --- large-eddy simulations --- tropical cyclones --- Doppler Wind Lidar --- atmospheric boundary layer --- wind structure --- wind energy --- Doppler lidar --- wind turbine controls --- lidar-assisted control (LAC) --- IEA Wind Task 32 --- coastal wind measurement --- vertical Light Detection and Ranging --- NeoWins --- fetch effect --- Hazaki Oceanographical Research Station --- empirical equation --- complex terrain --- complex flow --- lidar --- VAD --- remote sensing --- wind energy --- Doppler lidar --- NWP model --- mesoscale --- Floating Lidar System (FLS), wind resource assessment --- wind atlas --- lidar --- wind --- Doppler --- aerosol --- motion estimation --- optical flow --- cross-correlation --- wind energy --- gust prediction --- variational analysis --- Doppler radar --- five-minute ahead wind power forecasting --- probabilistic forecasting --- remote sensing forecasting --- offshore wind speed forecasting --- wind energy --- remote sensing --- Doppler wind lidar --- velocity-azimuth-display algorithm --- resource assessment --- offshore --- turbulence intensity --- Doppler wind lidar --- wind energy --- aerosol --- wind turbine --- wind farm --- wake --- control --- complex terrain --- offshore

Wind Turbine Aerodynamics

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ISBN: 9783039215249 / 9783039215256 Year: Pages: 410 DOI: 10.3390/books978-3-03921-525-6 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 11:49:15
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Wind turbine aerodynamics is one of the central subjects of wind turbine technology. To reduce the levelized cost of energy (LCOE), the size of a single wind turbine has been increased to 12 MW at present, with further increases expected in the near future. Big wind turbines and their associated wind farms have many advantages but also challenges. The typical effects are mainly related to the increase in Reynolds number and blade flexibility. This Special Issue is a collection of 21 important research works addressing the aerodynamic challenges appearing in such developments. The 21 research papers cover a wide range of problems related to wind turbine aerodynamics, which includes atmospheric turbulent flow modeling, wind turbine flow modeling, wind turbine design, wind turbine control, wind farm flow modeling in complex terrain, wind turbine noise modeling, vertical axis wind turbine, and offshore wind energy. Readers from all over the globe are expected to greatly benefit from this Special Issue collection regarding their own work and the goal of enabling the technological development of new environmentally friendly and cost-effective wind energy systems in order to reach the target of 100% energy use from renewable sources, worldwide, by 2050

Keywords

H-type floating VAWT --- truss Spar floating foundation --- coupling of aerodynamics and hydrodynamics --- computational fluid dynamics --- wind farm --- complex terrain --- SCADA --- met mast measurements --- wind turbine --- simplified free vortex wake --- vortex ring --- aerodynamics --- axial steady condition --- variable pitch --- H-type VAWT --- straight blade --- DMST model --- NACA0012 --- wind energy --- power coefficient --- tip speed ratio --- wind turbine blade optimization --- computational fluid dynamic --- actuator disc --- wake effect --- Non-dominated Sorting Genetic Algorithm (NSGA-II) --- wind turbine airfoil --- dynamic stall --- boundary layer separation --- aerodynamic characteristics --- rotor blade optimization --- blade parametrization --- computational fluid dynamics --- OpenFOAM --- gradient-based --- adjoint approach --- wind turbine optimization --- low wind speed areas --- cost of energy --- particle swarm optimization --- dynamic stall --- pitch oscillation --- oscillating freestream --- rotational augmentation --- wind turbine --- turbulence --- super-statistics --- piezo-electric flow sensor --- ABL stability --- laminar-turbulent transition --- wind speed extrapolation --- atmospheric stability --- wind shear --- wind resource assessment --- wind turbine --- stall --- NREL Phase VI --- S809 airfoil --- MEXICO --- RANS --- wind turbine wakes --- turbulence --- actuator disk --- LES --- wind tunnel --- OpenFOAM --- wind turbine --- wind turbine design --- optimization --- blade length --- economic analysis --- typhoon --- wind turbine --- meso/microscale --- aerodynamic force --- mechanical performance --- thermography --- wind turbine blades --- defects --- image processing --- condition monitoring --- wind farm --- layout optimization --- design --- random search --- complex terrain --- airfoil design --- aerodynamic --- wind tunnel experiment --- VAWTs (Vertical axis wind turbines) --- computational fluid dynamics --- floating offshore wind turbine --- dynamic fluid body interaction --- semi-submersible platform --- OC5 DeepCWind --- wind turbine --- aerodynamics --- turbulent inflow --- Computational Fluid Dynamics --- blade element momentum theory --- actuator line method --- Fatigue Loads --- wind turbine noise source --- wind turbine noise propagation --- wind turbine wake --- n/a

The Wind ~ An Unruly Living

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ISBN: 9781947447950 9781947447967 Year: Pages: 176 DOI: 10.21983/P3.0237.1.00 Language: English
Publisher: punctum books
Subject: History
Added to DOAB on : 2019-03-26 11:21:03
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A process begun in Pisa, Italy in April of 2016 during a workshop on political theory in the Anthropocene, The Wind ~ An Unruly Living is a philosophical exercise (askêsis, translated, following Ignatius of Loyola, as “spiritual exercise”). In his exercise, Bendik-Keymer throws to the void: the ideology of self-ownership from a society of possession. By using the Stoic kanôn, the rule of living by phûsis, he follows an element. Unhappily for the Stoic and happily for us, the wind is unruly. A swerve of currents through a social fabric, it’s full of holes, all holely. Stretch and stitch as you want, it might settle more shapely tattered into light, but it will never become whole. The wind’s only holesome.

Modellsimulationen zur Strömungsverstärkung von orographischen Grundstrukturen bei Sturmsituationen

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Book Series: Wissenschaftliche Berichte des Instituts für Meteorologie und Klimaforschung der Universität Karlsruhe (TH) ISSN: 01795619 ISBN: 9783866441408 Year: Volume: 40 Pages: VI, 173 p. DOI: 10.5445/KSP/1000006636 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Astronomy (General)
Added to DOAB on : 2019-07-30 20:01:59
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In dieser Arbeit wird der Einfluss orographischer Geländestrukturen hinsichtlich ihrer windverstärkenden Wirkung untersucht. Dies erfolgt mit Hilfe des mesoskaligen meteorologischen Modells KAMM2, welches atmosphärische Strömungen numerisch berechnet. Die Ergebnisse zeigen Regionen mit erhöhten Windgeschwindigkeiten für idealisierte orographische Strukturen sowie für komplexes Gelände auf.

Investigation of flow and pressure characteristics around pyramidal buildings

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Book Series: Dissertationsreihe am Institut für Hydromechanik der Universität Karlsruhe (TH) ISSN: 14394111 ISBN: 3937300724 Year: Volume: 2005,3 Pages: XVI, 138 p. DOI: 10.5445/KSP/1000003455 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
Added to DOAB on : 2019-07-30 20:02:00
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Pyramidal buildings are undergoing a renaissance in todays architectural design due to their attractive mystery that has fascinated many architects. From an aerodynamic engineering point of view, structural buildings with the shape of a pyramid have their own interesting and particular aerodynamic characteristics as compared to other usual structural buildings (i.e. cuboidal).However, despite its distinct aerodynamic characteristics compared to other usual structural buildings, the flow and pressure characteristics around pyramidal structures have not yet been investigated completely. Very limited studies about pyramidal buildings can be found in the literature.Consequently, the technical layout with respect to wind load assumption of pyramidal buildings are usually not listed in standard tables which underlines the need of systematic investigations for pyramidal structures.In this study, pyramids with a wide range of base angle variation (theta = 30°, 40°, 45°, 50°, 55°, 60°, 70°) have been investigated intensively through a detailed and accurate laboratory experiments at the Laboratory of Building- and Environmental Aerodynamics, Institute for Hydromechanics, at the University of Karlsruhe. The flow measurements were performed using a 2-D Laser Doppler anemometry (LDA) and The pressure measurements were carried out using a standard pressure tapping technique. The present study focuses on the most important parameters affecting the flow and pressure characteristics that include the influence of base angles, the influence of wind directions and the influence of the pyramid heights with respect to a characteristic length. Besides the experimental investigations, numerical investigations with the aid of a software package called FLOVENT were also additionally performed in order to prove, whether experimental and numerical studies deliver the same results.Based on the flow measurement results, this study was able to distinguish the general characteristics of flow around pyramid building when compared to other type of structures (i.e. cuboidal structure). A set of equations to calculate the reattachment length at the leeward side of the pyramid was generated. In addition, an equation to estimate the zero streamline and an area below line as a function of the reattachment length and base angle, respectively, are proposed. These equations will illustrate the recirculation zone at the leeward side of the pyramid.The pressure measurement results show that the three investigated parameters (base angle, wind direction and pyramid height) have an important influence to the pressure characteristics (magnitude of pressure, suction and fluctuation) in the surfaces of the pyramids. For practical purposes, this study was able to provide the typical values of pressure and aerodynamic coefficients for pyramidal buildings that can be used for structural calculations. The values that are given in this study can be used to fill in the gap of the unavailable design values for pyramidal buildings in standard tables.

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