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Wells Turbine
The Wells turbine is a low-pressure Wind turbine, air turbine that rotates continuously in one direction independent of the direction of the air flow. Its blades feature a symmetrical airfoil with its plane of symmetry in the plane of rotation and perpendicular to the air stream. It was developed for use in Oscillating Water Column wave power plants, in which a rising and falling water surface moving in an air compression chamber produces an oscillating air current. The use of this bidirectional turbine avoids the need to rectify the air stream by delicate and expensive check valve systems. Its efficiency is lower than that of a turbine with constant air stream direction and asymmetric airfoil. One reason for the lower efficiency is that symmetric airfoils have a higher drag coefficient than asymmetric ones, even under optimal conditions. Also, in the Wells turbine, the symmetric airfoil runs partly under high angle of attack (i.e., low blade speed / air speed ratio), which occu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wells Turbine De
Wells most commonly refers to: * Wells, Somerset, a cathedral city in Somerset, England * Well, an excavation or structure created in the ground * Wells (name) Wells may also refer to: Places Canada *Wells, British Columbia England * Wells (Priory Road) railway station was a railway station in Wells, Somerset * Wells (Tucker Street) railway station was a railway station in Wells, Somerset * Wells (UK Parliament constituency), the UK parliamentary constituency in which the city of Wells, Somerset, is located * Wells-next-the-Sea, town and port in Norfolk ** Wells-on-Sea railway station was a railway station in Wells-next-the-Sea Scotland * Wells, Roxburghshire, a Scottish feudal barony United States *Wells, California, former name of Keene, California *Wells, Indiana *Wells, Kansas *Wells, Maine *Wells, Minnesota *Wells, Mississippi *Wells, Nevada *Wells, New York, a town **Wells (CDP), New York, a census-designated place in the town *Wells, Texas *Wells, Vermont, a New Engla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queen's University Belfast
, mottoeng = For so much, what shall we give back? , top_free_label = , top_free = , top_free_label1 = , top_free1 = , top_free_label2 = , top_free2 = , established = , closed = , type = Public research university , parent = , affiliation = , religious_affiliation = , academic_affiliation = , endowment = £70.0 million , budget = £395.8 million , rector = , officer_in_charge = , chairman = , chairperson = , chancellor = Hillary Clinton , president = , vice-president = , superintendent = , vice_chancellor = Ian Greer , provost = , principal = , dean = , director = , head_label = , head = , academic_staff = 2,414 , administrative_staff = 1,489 , students = () , undergrad = () , postgrad = () , doctoral = , other = 2,250 (Colleges) , address = , city = Belfast , state = , province = , postalcode = , country = Northern Ireland , campus = Urban , language = , free_label = Newspaper , free = ''The Go ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Renewable Energy Technology
Renewable energy is energy that is collected from renewable resources that are naturally replenished on a human timescale. It includes sources such as sunlight, wind, the movement of water, and geothermal heat. Although most renewable energy sources are sustainable, some are not. For example, some biomass sources are considered unsustainable at current rates of exploitation. Renewable energy often provides energy for electricity generation to a grid, air and water heating/cooling, and stand-alone power systems. Renewable energy technology projects are typically large-scale, but they are also suited to rural and remote areas and developing countries, where energy is often crucial in human development. Renewable energy is often deployed together with further electrification, which has several benefits: electricity can move heat or objects efficiently, and is clean at the point of consumption. In addition, electrification with renewable energy is more efficient and therefore lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Station Technology
Power most often refers to: * Power (physics), meaning "rate of doing work" ** Engine power, the power put out by an engine ** Electric power * Power (social and political), the ability to influence people or events ** Abusive power Power may also refer to: Mathematics, science and technology Computing * IBM POWER (software), an IBM operating system enhancement package * IBM POWER architecture, a RISC instruction set architecture * Power ISA, a RISC instruction set architecture derived from PowerPC * IBM Power microprocessors, made by IBM, which implement those RISC architectures * Power.org, a predecessor to the OpenPOWER Foundation * SGI POWER Challenge, a line of SGI supercomputers Mathematics * Exponentiation, "''x'' to the power of ''y''" * Power function * Power of a point * Statistical power Physics * Magnification, the factor by which an optical system enlarges an image * Optical power, the degree to which a lens converges or diverges light Social sciences and polit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbines
A turbine ( or ) (from the Greek , ''tyrbē'', or Latin ''turbo'', meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful Work (physics), work. The work produced by a turbine can be used for generating electrical power when combined with a electric generator, generator.Munson, Bruce Roy, T. H. Okiishi, and Wade W. Huebsch. "Turbomachines." Fundamentals of Fluid Mechanics. 6th ed. Hoboken, NJ: J. Wiley & Sons, 2009. Print. A turbine is a turbomachinery, turbomachine with at least one moving part called a rotor assembly, which is a shaft or drum with Turbine blade, blades attached. Moving fluid acts on the blades so that they move and impart rotational energy to the rotor. Early turbine examples are windmills and waterwheels. Gas turbine, Gas, steam turbine, steam, and water turbine, water turbines have a casing around the blades that contains and controls the working fluid. Credit for invention of the steam turbine is given ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanical Engineering
Mechanical engineering is the study of physical machines that may involve force and movement. It is an engineering branch that combines engineering physics and mathematics principles with materials science, to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the engineering branches. Mechanical engineering requires an understanding of core areas including mechanics, dynamics, thermodynamics, materials science, structural analysis, and electricity. In addition to these core principles, mechanical engineers use tools such as computer-aided design (CAD), computer-aided manufacturing (CAM), and product lifecycle management to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics, medical devices, weapons, and others. Mechanical engineering emerged as a field during the Industrial Revolution in Europe in the 18th century; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yoshio Masuda
Yoshio Masuda (died 2009) was a former Japanese naval commander, regarded as the father of modern wave power technology. Among other devices, the now used principle of Oscillating Water Column is regarded as his invention. It was initially used for small-scale navigation buoys. See also *Wave power Wave power is the capture of energy of wind waves to do useful work – for example, electricity generation, water desalination, or pumping water. A machine that exploits wave power is a wave energy converter (WEC). Waves are generated by wind p ... References Japanese military personnel Wave power 2009 deaths Year of birth missing {{japan-mil-bio-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siadar Wave Energy Project
The Siadar Wave Power Station (also known as Siadar Wave Energy Project or SWEP) was a proposed 4 Megawatt, MW wave farm off the shore of Siadar Bay, in Isle of Lewis, Lewis, Scotland. The £30 million project, was to be built by Wavegen, received Scottish Government approval on 22 January 2009. Originally, the project was developed in cooperation with npower Renewables. However, in August 2011, npower Renewables left the project. In 2012 project was cancelled. The wave station was proposed to be based on oscillating water column technology. A causeway will be constructed, and a Breakwater (structure), breakwater with 10 concrete Caisson (engineering), caissons, containing 36 to 40 Wells turbines, placed on the seabed. See also *Wave Energy *Renewable energy in Scotland *European Marine Energy Centre *Aegir wave farm *Pelamis Wave Power *Aquamarine Power References External linksSiadar Wave Power Schemeat npower renewables at WavegenSiadar Bay Wave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 blades allows the blade to be stressed only in tension at high rotating speeds. There are several closely related wind turbines that use straight blades. This design of the turbine was patented by Georges Jean Marie Darrieus, a French aeronautical engineer; filing for the patent was October 1, 1926. There are major difficulties in protecting the Darrieus turbine from extreme wind conditions and in making it self-starting. Method of operation In the original versions of the Darrieus design, the aerofoils are arranged so that they are symmetrical and have zero rigging angle, that is, the angle that the aerofoils are set relative to the structure on which they are mounted. This arrangement is equally effective no matter which direction the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alan Arthur Wells
Alan Arthur Wells (1 May 1924 – 8 November 2005) was a British structural engineer. Early life He was born in Goff's Oak, Hertfordshire to Arthur John Wells, a British Oxygen Company engineer and educated at the City of London School as a day boy. He left school in 1940 to become an apprentice fitter and studied for a London University external degree via day release and weekend classes. He was awarded an intermediate B.Sc. in 1941 at the age of 17. After two years at Nottingham University College he was awarded an honours degree in Engineering, 2nd Class. He had married Rosemary Mitchell in June 1950. Honours and awards * 1942 Bayliss Prize, Institution of Civil Engineers * 1946 Miller Prize, Institution of Civil Engineers * 1955 President’s Gold Medal, Society of Engineers * 1956 Premium Award, Royal Institution of Naval Architects * 1964 Houdremont Lecture, International Institute of Welding * 1966 Hadfield Medal, Iron and Steel Institute * 1968 Larke Medal, Institute of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wind Turbine
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] |
Stall (flight)
In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack increases.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', p. 486. Aviation Supplies & Academics, 1997. This occurs when the critical angle of attack of the foil is exceeded. The critical angle of attack is typically about 15°, but it may vary significantly depending on the fluid, foil, and Reynolds number. Stalls in fixed-wing flight are often experienced as a sudden reduction in lift as the pilot increases the wing's angle of attack and exceeds its critical angle of attack (which may be due to slowing down below stall speed in level flight). A stall does not mean that the engine(s) have stopped working, or that the aircraft has stopped moving—the effect is the same even in an unpowered glider aircraft. Vectored thrust in aircraft is used to maintain altitude or controlled flight with wings stalled by replacing lost wing lift with engine or propeller t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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