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Wells Turbine
The Wells turbine is a low-pressure 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 occurs during t ... [...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 barony United States *Wells, California, former name of Keene, California * Wells Peak * 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queen's University Belfast
The Queen's University of Belfast, commonly known as Queen's University Belfast (; abbreviated Queen's or QUB), is a public research university in Belfast, Northern Ireland, United Kingdom. The university received its charter in 1845 as part of the Queen's University of Ireland and opened four years later, together with University of Galway (as ''Queen's College, Galway'') and University College Cork (as ''Queen's College, Cork''). Queen's offers approximately 300 academic degree programmes at various levels. The current president and Chancellor (education), vice-chancellor is Ian Greer (obstetrician), Ian Greer. The annual income of the institution for 2023–24 was £474.2 million, of which £105.2 million was from research grants and contracts, with an expenditure of £345.9 million. Queen's is a member of the Russell Group of research-intensive universities, the Association of Commonwealth Universities, the European University Association, Universities UK and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Renewable Energy Technology
A renewable resource (also known as a flow resource) is a natural resource which will replenish to replace the portion resource depletion, depleted by usage and consumption, either through natural reproduction or other recurring processes in a finite amount of time in a human time scale. It is also known as non conventional energy resources. When the recovery rate of resources is unlikely to ever exceed a human time scale, these are called perpetual resources. Renewable resources are a part of Earth's natural environment and the largest components of its Ecosphere (ecology), ecosphere. A positive life-cycle assessment is a key indicator of a resource's sustainability. Definitions of renewable resources may also include agricultural production, as in sustainable agriculture, agricultural products and to an extent water resources. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Station Technology
Power may refer to: Common meanings * Power (physics), meaning "rate of doing work" ** Engine power, the power put out by an engine ** Electric power, a type of energy * Power (social and political), the ability to influence people or events 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 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 politics * Economic power, encompassing several concepts that econ ... [...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. The work produced can be used for generating electrical power when combined with a 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 turbomachine with at least one moving part called a rotor assembly, which is a shaft or drum with blades attached. Moving fluid acts on the blades so that they move and impart rotational energy to the rotor. Gas, steam, and water turbines have a casing around the blades that contains and controls the working fluid. Modern steam turbines frequently employ both reaction and impulse in the same unit, typically varying the degree of reaction and impulse from the blade root to its periphery. History Hero of Alexandria demonstrated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanical Engineering
Mechanical engineering is the study of physical machines and mechanism (engineering), mechanisms that may involve force and movement. It is an engineering branch that combines engineering physics and engineering mathematics, mathematics principles with materials science, to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the List of engineering branches, engineering branches. Mechanical engineering requires an understanding of core areas including mechanics, Analytical dynamics, dynamics, thermodynamics, materials science, design, structural analysis, and electricity. In addition to these core principles, mechanical engineers use tools such as computer-aided design (CAD), computer-aided manufacturing (CAM), computer-aided engineering (CAE), and product lifecycle management to design and analyze manufacturing plants, industrial equipment and industrial machinery, machinery, HVAC, heating and cooling systems, transport systems, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yoshio Masuda
Yoshio Masuda (died 2009) was a 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 buoy A buoy (; ) is a buoyancy, floating device that can have many purposes. It can be anchored (stationary) or allowed to drift with ocean currents. History The ultimate origin of buoys is unknown, but by 1295 a seaman's manual referred to navig ...s. 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 MW wave farm off the shore of Siadar Bay, in 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 with 10 concrete 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 Aquamarine Power was a British wave energy company, founded in 2005 to commercialise the Oyster wave energy converter, a device to capture energy from near-shor ... [...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 th ... [...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 wind power, converts the kinetic energy of wind into electrical energy. , hundreds of thousands of list of most powerful wind turbines, large turbines, in installations known as wind farms, were generating 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, hydroelectricity, hydro, geothermal power, geothermal, coal power, coal and gas-fired power plant, gas energy sources. Smaller wind turbines are used for applications such as battery charging and remote devices such as traffic warning signs. Larger turbines can contribute to a domestic power supply while selling unused power back to the u ... [...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 exceeds its critical value.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', p. 486. Aviation Supplies & Academics, 1997. The critical angle of attack is typically about 15°, but it may vary significantly depending on the fluid, foil – including its shape, size, and finish – and Reynolds number. Stalls in fixed-wing aircraft are often experienced as a sudden reduction in lift. It may be caused either by the pilot increasing the wing's angle of attack or by a decrease in the critical angle of attack. The former may be due to slowing down (below stall speed), the latter by accretion of ice on the wings (especially if the ice is rough). 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 alti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
