Vertical Axis Wind Turbine Evaluation and Design

The horizontal axis wind turbine HAWT was invented before the vertical axis wind turbine (VAWT), which led to its popularity and wide use. Figure 1.2 shows a diagram of these two types of systems. 3 Figure 1.2 HAWT VS. VAWT Design This project is an extension of previous work at WPI in MQP projects that focused

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Expiring Patents

Expiring Patents. Every day patents are expiring. Under the current Patent Act, patents last a maximum of 20 years from the date of filing. There are also 'Old Act' patents which expiry at the later of 20 years from the date of filing or 17 years from the date of issue. The first 'New Act' patents expired on October 2, 2009.

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Vertical

A vertical-axis wind turbine (VAWT) is a type of wind turbine where the main rotor shaft is set transverse to the wind (but not necessarily vertically) while the main components are located at the base of the turbine. This arrangement allows the generator and gearbox to be located close to the ground, facilitating service and repair. VAWTs do not need to be pointed into the wind, which removes

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HORIZONTAL AXIS WIND TURBINE ROTOR ASSEMBLY WITH

The present invention relates to a horizontal axis wind turbine rotor assembly with attached rotor blades having the aerodynamic characteristics of a low aspect ratio lifting body rather than a higher aspect ratio wing. Reference is made to provisional patent application number 61/002,087, filed November 5, 2007 by Thomas Stewart Bernatz.

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Wind Equipment

In competition on the wind energy market, one thing above all counts: lowest generation costs – Cost of Energy (CoE). And these, in turn, require highly efficient wind turbines that run smoothly and without disruption. Wind turbines with powerful, reliable components, seamlessly integrated and with optimum availability. Digitalization provides valuable support in this respect.

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Wind Research and Development

Offshore Wind: Funding research to develop and demonstrate effective turbine technologies and overcome key barriers to deployment along U.S. coastlines.. Distributed Wind: Addressing the cost, performance, and engineering challenges associated with small and medium wind turbines by focusing on design optimization, testing, certification, and manufacturing.

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Power from Wind: A History of Windmill Technology

Sep 12, 1996The wind is a fickle source of power. Windspeeds are frequently too low to be of any practical use, so that windpower has generally remained a marginal resource. Since the inception of windpower around 1000 AD, technology has been deployed to obtain the most economical power from wind. The author traces its technical evolution, concentrating on the growth in understanding of wind

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Guardian

U.S. Patent #6,604,330 and Canadian Patent 2,409,312. Specially designed for high wind uplift resistance. Horizontal and vertical paver movement is prevented. Based on Florida's Building Code TAS 108 test, Guardian will provide a wind uplift resistance of -81.1 psf. 4 Guardian Paver sizes available: 18 x 36, 24 x 24, 24 x 36 and 30 x

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US Patent, Patent Application and Patent Search

Browse Patents by US Classification. Apparel (Class 2) Baths, closets, sinks, and spittoons (Class 4) Beds (Class 5) Compound tools (Class 7) Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers (Class 8) Boot and shoe making (Class 12) Bridges (Class 14) Brushing, scrubbing, and general cleaning (Class 15)

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Wind Turbine Airfoils

Wind Tunnel Testing of Three S809 Aileron Configurations for use on Horizontal Axis Wind Turbines: Airfoil Performance Report ( PDF 15.20 ). R. Reuss Ramsay. J. M. Janiszewska. G.M. Gregorek. The Ohio State University. July 1996. Design and Experimental Results for the S809 Airfoil ( PDF 3.45 ) Somers, D.M. Airfoils, Inc.

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WIND ENERGY

1.2 Modern Wind Turbines 6 1.3 Scope of the Book 7 References 8 Bibliography 9 2 The Wind Resource 11 2.1 The Nature of the Wind 11 2.2 Geographical Variation in the Wind Resource 12 2.3 Long-term Wind-speed Variations 13 2.4 Annual and Seasonal Variations 14 2.5 Synoptic and Diurnal Variations 16 2.6 Turbulence 17 2.6.1 The nature of turbulence 17

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Home

The 2-bladed Wind Tulip is much more than a beautiful piece of Eco-Art! Its patent-pending and patent-granted aerodynamics make it much more cost-effective. We have addressed the problems keeping small wind from being one of the major worldwide players in renewable energy and shattered myths about small turbines where important science was

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NWS JetStream

Origin of Wind. Wind is simply air in motion. Usually in meteorology, when we are talking about the wind it is the horizontal speed and direction we are concerned about. For example, if you hear a report of a west wind at 15 mph (24 km/h) that means the horizontal winds will be

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Vintage Windmill Parts List

Vintage Windmill Parts List specializes in collectable, antique vintage windmill windmill pump related literature. We offer FREE immediate access PDF downloads for most post WWI windmills including Aermotor, Baker, Challenge, Currie, Demming, Dempster, Eclipse, Elgin, Fairbanks-Morse, Fairbury, Flint Walling, Heller-Aller, I.X.L, Monitor, Red Jacket, Samson-Stover, Tahern, Wonder

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Wind Turbine Designs

Jul 13, 2010The vertical Savonious 2.0 and Savonious 5.0 have a patent pending design which empowers the turbine to convert wind power into energy less

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Numerical Investigation of the Savonius Vertical Axis Wind

Therefore, most wind turbines in the commercial market today are horizontal axis turbines. Figure 1. The variation curve of the rotor power coefficient (Cp) average to tip speed ratio (TSR) in different types of wind turbines [6]. Vertical axis wind turbines (VAWTs) represent a much less employed type of wind turbine.

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Airfoils for wind turbine (Patent)

Jan 01, 1996A thick airfoil for the root region of the blade of a wind turbine. The airfoil has a thickness in a range from 24%-26% and a Reynolds number in a range from 1,000,000 to 1,800,000. The airfoil has a maximum lift coefficient of 1.4-1.6 that has minimum

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4.8MW

BIGGER IS BETTER—AT LEAST WHEN IT COMES TO WIND TURBINES. While the cost of wind power has been falling over the last five years, the size of wind turbines has only increased—and in September 2017, GE premiered its largest wind turbine to date—the 4.8-158.Not only is the new 4.8-158 turbine's rotor the diameter of more than one-and-a-half American football fields, each of its blade is

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Wind farms: How much power does a wind turbine produce

Oct 07, 2020The energy used by every house in the UK is variable, but the average domestic electricity consumption rate for a home is 0.5 kilowatts or 500 watts. An eight megawatt offshore wind turbine

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The complicated U.S. regulations for offshore wind vessels

Aug 02, 2021A series of new vertical axis wind turbine patents intend to replace the horizontal axis wind turbines, but cannot replace it, because the drag is close to the impact force, because one wing catches the wind, the other is blocked by the wind.

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Nashtifan Windmills

Discover Nashtifan Windmills in Nashtifan, Iran: The vertical-axis windmills of ancient Persia have been grinding for 1,000 years and counting.

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Shear and Convective Storms

Without any vertical wind shear, the horizontal vorticity at the leading edge of the cold pool drags the air up and over the cold pool equally on all sides. When there is low-level vertical wind shear (as shown by the wind vectors on the side of the diagram), one side of the cold pool will be preferred for deep lifting.

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How it works?

Sep 27, 2018Vortex currently sweeps up as much as 30 % of the working area of a conventional 3-blades-based wind turbine of identical height. As a result, generally speaking we can say Vortex wind power is less power efficient than regular horizontal-axis wind turbines.

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Wind Turbine Cost: Worth The Million

Jul 22, 2021The Breakdown of Initial Wind Turbine Costs. $2.6 – $4 million per average-sized commercial wind turbine. Typical cost is $1.3 million per megawatt (MW) of electricity-producing capacity; Most commercial wind turbines have a capacity

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1906 Wright US Patent #821,393

May 22, 2011also serve to support the front or horizontal rudder, the construction of which we will now proceed to describe. The front rudder 31 is a horizontal rudder having a flexible body, the same consisting of three stiff cross-pieces or sticks 32, 33, and 34, and the flexible ribs 35, connecting said cross-pieces and extending from front to rear. The

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Wind PowerWind Power Fundamentals

Jan 24, 2009– Horizontal-Axis Wind-Mill: sails connected to a horizontal shaft on a tower encasing gears and axles for translating horizontal into rotational motionfor translating horizontal into rotational motion Wind in 19th century US – Wind-rose horizontal-axis wate r-pumping wind-mills found throughout rural America Torrey, Volta (1976) Wind

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China Is Taking the Worldwide Lead in Wind Power

Apr 04, 2019By the end of 2020, China aims to have 210 gigawatts (GW) of grid-connected wind energy capacity. Its capacity at the beginning of 2018 led the world with around 187 GW, compared to 89 GW for the US in second place and 56 GW for Germany in third. Wind energy isn't the only renewable where China is the pacesetter.

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The Long, Strange History of People Filing Flying Saucer

Oct 27, 2017The patent document for this 2003 invention describes it as a "ring-shaped wing helicopter, which is similar to a flying saucer in appearance." Google Patents/ US 20030122033 A1

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Modeling and control of Squirrel Cage Induction Generator

The wind power capacity in Finland is 144 MW, 119 wind turbines (May 2009).Wind power production in 2008 was about 260 GWh which is 0.3% of the Finnish electricity consumption,[1]. The target of the Finnish Government is to have 2000 MW of installed wind energy capacity by 2020,[2].

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Lets the wind in, keeps the rain out

The Innovent block is a new, patent-protected concrete louver ventilation block designed in Trinidad and Tobago. It allows for airflow through a wall while inhibiting the passage of precipitation (such as a horizontal or wind driven rain) through its unique and innovative design features. The main a

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Dodgy wind? Why innovative turbines are often anything but

Jun 14, 2013Virtually every week there are articles about new and innovative methods for harvesting wind energy. And every week more megawatts of capacity from three-blade horizontal-axis wind turbines (HAWT

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Espacenet

Aug 25, 2019Enjoy a seamless search experience and an application that adapts to the size/format of your devices. Search in all data, including full text, per default. See your search query at all times and refine it whenever you want. Browse the entire result list with abstract snippets and/or drawings. Navigate the result list and document details at the

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