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Quietrevolution Wind Turbine
Quietrevolution (often stylized with lower-case "q": quietrevolution) is a brand of vertical-axis wind turbines owned since 2014 by VWT Power in the United Kingdom. Quietrevolution's helical designs are related to the Gorlov turbine, which evolved from the Darrieus wind turbine. 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 were taken over later in 2014 by VWT Power Limited, which now offers an improved qr6 model. Both models consist of three vertical airfoil blades, each having a helical twist of 120 degrees. This feature spreads the torque 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 sides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queen Elizabeth Olympic Park
Queen Elizabeth Olympic Park is a sporting complex and public park in Stratford, Hackney Wick, Leyton and Bow, in east London. It was purpose-built for the 2012 Summer Olympics and Paralympics, situated adjacent to the Stratford City development. It contains the Olympic stadium, now known as the London Stadium, and the Olympic swimming pool together with the athletes' Olympic Village and several other Olympic sporting venues and the London Olympics Media Centre. The park is overlooked by the ArcelorMittal Orbit, an observation tower and Britain's largest piece of public art. It was simply called The Olympic Park during the Games but was later renamed to commemorate the Diamond Jubilee of Queen Elizabeth IIGames Site Renamed the Queen Elizabeth Olympic Park BBC News, 7 October 2010; Ret ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wind Turbines
A wind turbine is a device that converts the kinetic energy of wind into electrical energy. Hundreds of thousands of large turbines, in installations known as wind farms, now generate over 650 gigawatts of power, with 60 GW added each year. Wind turbines are an increasingly important source of intermittent renewable energy, and are used in many countries to lower energy costs and reduce reliance on fossil fuels. One study claimed that, wind had the "lowest relative greenhouse gas emissions, the least water consumption demands and the most favorable social impacts" compared to photovoltaic, hydro, geothermal, coal and gas energy sources. Smaller wind turbines are used for applications such as battery charging for auxiliary power for boats or caravans, and to power traffic warning signs. Larger turbines can contribute to a domestic power supply while selling unused power back to the utility supplier via the electrical grid. Wind turbines are manufactured in a wide range of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 conservation of mass and momentum of the air stream flowing through an idealized "actuator disk" that extracts energy from the wind stream. According to Betz's law, no turbine can capture more than 16/27 (59.3%) of the kinetic energy in wind. The factor 16/27 (0.593) is known as Betz's coefficient. Practical utility-scale wind turbines achieve at peak 75–80% of the Betz limit. The Betz limit is based on an open-disk actuator. If a diffuser is used to collect additional wind flow and direct it through the turbine, more energy can be extracted, but the limit still applies to the cross-section of the entire structure. Concepts Betz's law applies to all Newtonian fluids, including wind. If all of the energy coming from wind movement through a tur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 important with renewable energy sources like wind and solar, which are non-dispatchable (when not coupled to storage). Monthly net metering allows consumers to use solar power generated during the day at night, or wind from a windy day later in the month. Annual net metering rolls over a net kilowatt-hour (kWh) credit to the following month, allowing solar power that was generated in July to be used in December, or wind power from March in August. Net metering policies can vary significantly by country and by state or province: if net metering is available, if and how long banked credits can be retained, and how much the credits are worth (retail/wholesale). Most net metering laws involve monthly rollover of kWh credits, a small monthly connec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 as distributed energy resources (DER). Conventional power stations, such as coal-fired, gas, and nuclear powered plants, as well as hydroelectric dams and large-scale solar power stations, are centralized and often require electric energy to be transmitted over long distances. By contrast, DER systems are decentralized, modular, and more flexible technologies that are located close to the load they serve, albeit having capacities of only 10 megawatts (MW) or less. These systems can comprise multiple generation and storage components; in this instance, they are referred to as hybrid power systems. DER systems typically use renewable energy sources, including small hydro, biomass, biogas, solar power, wind power, and geothermal power, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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) * Southwest (USA) – closed 20 February 2013 which is now Primus windpower * TUGE Energia (Estonia) * Urban Green Energy (USA) – no longer manufacturing small wind turbines as of 2018 * Harmony Turbines (USA) Large wind turbine manufacturers Current manufacturers * China Guodian Corporation (China) – turbine brand United Wind Power * CRRC (China) * CSIC (Chongqing) – HZ Wind Power (China) * Envision Energy (China) * Goldwind (China) * SANY (China) * Shanghai Electric (China) (SEwind) * Sinovel (China) * NovaWind (Russia) – Subsidiary of Rosatom * GE Renewable Energy (France) * PacWind (USA) * Elecon Engineering (India) * Inox Wind (India) * RRB Energy Limited (India) * Suzlon (India) * World Wind (India) * Enercon ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BBC News Online
BBC News Online is the website of BBC News, the division of the BBC responsible for newsgathering and production. It is one of the most popular news websites, with 1.2 billion website visits in April 2021, as well as being used by 60% of the UK's internet users for news. The website contains international news coverage, as well as British, entertainment, science, and political news. Many reports are accompanied by audio and video from the BBC's television and radio news services, while the latest TV and radio bulletins are also available to view or listen to on the site together with other current affairs programmes. BBC News Online is closely linked to its sister department website, that of BBC Sport. Both sites follow similar layout and content options and respective journalists work alongside each other. Location information provided by users is also shared with the website of BBC Weather to provide local content. From 1998 to 2001 the site was named best news website at t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BBC News
BBC News is an operational business division of the British Broadcasting Corporation (BBC) responsible for the gathering and broadcasting of news and current affairs in the UK and around the world. The department is the world's largest broadcast news organisation and generates about 120 hours of radio and television output each day, as well as online news coverage. The service maintains 50 foreign news bureaus with more than 250 correspondents around the world. Deborah Turness has been the CEO of news and current affairs since September 2022. In 2019, it was reported in an Ofcom report that the BBC spent £136m on news during the period April 2018 to March 2019. BBC News' domestic, global and online news divisions are housed within the largest live newsroom in Europe, in Broadcasting House in central London. Parliamentary coverage is produced and broadcast from studios in London. Through BBC English Regions, the BBC also has regional centres across England and national news c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Wales since the establishment of University College Wales in 1872. The town is situated on Cardigan Bay on the west coast of Wales, near the confluence of the River Ystwyth and Afon Rheidol. Following the reconstruction of the harbour, the Ystwyth skirts the town. The Rheidol passes through the town. The seafront, with a pier, stretches from Constitution Hill at the north end of the Promenade to the harbour at the south. The beach is divided by the castle. The town is divided into five areas: Aberystwyth Town; Llanbadarn Fawr; Waunfawr; Llanbadarn; Trefechan; and the most populous, Penparcau. In 2011 the population of the town was 13,040. This rises to nearly 19,000 for the larger conurbation of Aberystwyth and Llanbadarn Fawr. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Guardian
''The Guardian'' is a British daily newspaper. It was founded in 1821 as ''The Manchester Guardian'', and changed its name in 1959. Along with its sister papers ''The Observer'' and ''The Guardian Weekly'', ''The Guardian'' is part of the Guardian Media Group, owned by the Scott Trust. The trust was created in 1936 to "secure the financial and editorial independence of ''The Guardian'' in perpetuity and to safeguard the journalistic freedom and liberal values of ''The Guardian'' free from commercial or political interference". The trust was converted into a limited company in 2008, with a constitution written so as to maintain for ''The Guardian'' the same protections as were built into the structure of the Scott Trust by its creators. Profits are reinvested in journalism rather than distributed to owners or shareholders. It is considered a newspaper of record in the UK. The editor-in-chief Katharine Viner succeeded Alan Rusbridger in 2015. Since 2018, the paper's main news ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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, i.e. along the direction towards which the wind is going. The side of a ship that is towards the leeward is its "lee side". If the vessel is heeling under the pressure of crosswind, the lee side will be the "lower side". During the Age of Sail, the term ''weather'' was used as a synonym for ''windward'' in some contexts, as in the ''weather gage''. Because it captures rain, the windward side of a mountain tends to be wet compared to the leeward it blocks. Origin The term "lee" comes from the middle-low German word // meaning "where the sea is not exposed to the wind" or "mild". The terms Luv and Lee (engl. Windward and Leeward) have been in use since the 17th century. Usage Windward and leeward directions (and the points ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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