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Quietrevolution (often stylized with lower-case "q": quietrevolution) is a brand of
Quietrevolution
Wind turbines Companies based in Cambridgeshire British brands {{windpower-stub
Quietrevolution (often stylized with lower-case "q": quietrevolution) is a brand of vertical-axis wind turbine
A vertical-axis wind turbine (VAWT) is a type of wind turbine where the main rotor shaft is set transverse to the wind while the main components are located at the base of the turbine. This arrangement allows the generator and gearbox to be ...
s owned since 2014 by VWT Power in the United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...
.
Quietrevolution's helical designs are related to the Gorlov turbine, which evolved from the Darrieus wind turbine
The Darrieus wind turbine is a type of vertical axis wind turbine (VAWT) used to generate electricity from wind energy. The turbine consists of a number of curved aerofoil blades mounted on a rotating shaft or framework. The curvature of the bla ...
. Quietrevolution's qr5 model won several awards, including ''Building'' magazine's 2006 Sustainable Innovation Award. However, the qr5 did not perform well enough to ensure the original company's success, and it went into administration in 2014. The company and its intellectual property
Intellectual property (IP) is a category of property that includes intangible creations of the human intellect. There are many types of intellectual property, and some countries recognize more than others. The best-known types are patents, cop ...
were taken over later in 2014 by VWT Power Limited, which now offers an improved qr6 model.
Both models consist of three vertical airfoil
An airfoil (American English) or aerofoil (British English) is the cross-sectional shape of an object whose motion through a gas is capable of generating significant lift, such as a wing, a sail, or the blades of propeller, rotor, or turbine.
...
blades, each having a helical
Helical may refer to:
* Helix, the mathematical concept for the shape
* Helical engine, a proposed spacecraft propulsion drive
* Helical spring, a coilspring
* Helical plc, a British property company, once a maker of steel bar stock
* Helicoil
A t ...
twist of 120 degrees. This feature spreads the torque
In physics and mechanics, torque is the rotational equivalent of linear force. It is also referred to as the moment of force (also abbreviated to moment). It represents the capability of a force to produce change in the rotational motion of th ...
evenly over the entire revolution, thus preventing the destructive pulsations of the straight-bladed giromill (Darrieus turbine). The wind pushes each blade around on both the windward and leeward
Windward () and leeward () are terms used to describe the direction of the wind. Windward is ''upwind'' from the point of reference, i.e. towards the direction from which the wind is coming; leeward is ''downwind'' from the point of reference ...
sides of the turbine.
The qr5 turbine, rated for 6.5 kW, measures in diameter and high. The qr6 is similar: 3.1 m wide and tall and is rated 7 kW.
Seven qr5 turbines were erected in 2012 at the Olympic Park
An Olympic Park is a sports campus for hosting the Olympic Games. Typically it contains the Olympic Stadium and the International Broadcast Centre. It may also contain the Olympic Village or some of the other sports venues, such as the aquatics ...
in London in a failed attempt to generate on site 20% of the park's post-games energy requirements. The turbines' usefulness was questioned: they were possibly net consumers of energy.
A public relations setback for the qr5 and original company was the poor performance of the turbine installed at Welsh government offices in Aberystwyth
Aberystwyth () is a university and seaside town as well as a community in Ceredigion, Wales. Located in the historic county of Cardiganshire, means "the mouth of the Ystwyth". Aberystwyth University has been a major educational location in ...
. The company blamed poor siting for the £48,000 turbine's generation of a monthly average of £5.28 worth of electricity (33 kWh) in 2012.
See also
*List of wind turbine manufacturers
This is a list of notable wind turbine manufacturers and businesses that manufacture major wind turbine components.
Small wind turbine manufacturers
* Bornay (Spain)
* Enessere (Italy)
* Hi-VAWT (Taiwan)
* quietrevolution (United Kingdom ...
*Distributed generation
Distributed generation, also distributed energy, on-site generation (OSG), or district/decentralized energy, is electrical generation and storage performed by a variety of small, grid-connected or distribution system-connected devices referred to ...
*Net metering
Net metering (or net energy metering, NEM) is an electricity billing mechanism that allows consumers who generate some or all of their own electricity to use that electricity anytime, instead of when it is generated. This is particularly importa ...
*Betz's law
Betz's law indicates the maximum power that can be extracted from the wind, independent of the design of a wind turbine in open flow. It was published in 1919 by the German physicist Albert Betz. The law is derived from the principles of conserva ...
References
External links
Quietrevolution
Wind turbines Companies based in Cambridgeshire British brands {{windpower-stub