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Pracana Dam
Pracana Dam ( pt, Barragem de Pracana, links=no) is a concrete buttress dam on the Ocreza, a right (northern) tributary of the Tagus. It is located in the municipality Mação, in Santarém District, Portugal. Construction of the dam began in 1947. The dam was completed in 1950. It is owned by ''Companhia Portuguesa de Produção de Electricidade'' (CPPE). The dam is used for power generation. Dam Pracana Dam is a 60 m tall (height above foundation) and 245.5 m long buttress dam with a crest altitude of 115 m. The volume of the dam is 144,000 m³. There is one shaft spillway on the right side of the dam and a chute spillway on the left side. The combined maximum discharge is 2,560 m³/s. There is also a bottom outlet which can discharge up to 52 m³/s. Reservoir At full reservoir level of 114 m the reservoir of the dam has a surface area of 5.5 km² and a total capacity of 111.9 mio. m³. The active capacity is 69 (95.6 or 102) mio. m³. Minimum operating level is 97 m. W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portugal
Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of the Azores and Madeira. It features the westernmost point in continental Europe, and its Iberian portion is bordered to the west and south by the Atlantic Ocean and to the north and east by Spain, the sole country to have a land border with Portugal. Its two archipelagos form two autonomous regions with their own regional governments. Lisbon is the capital and largest city by population. Portugal is the oldest continuously existing nation state on the Iberian Peninsula and one of the oldest in Europe, its territory having been continuously settled, invaded and fought over since prehistoric times. It was inhabited by pre-Celtic and Celtic peoples who had contact with Phoenicians and Ancient Greek traders, it was ruled by the Ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nameplate Capacity
Nameplate capacity, also known as the rated capacity, nominal capacity, installed capacity, or maximum effect, is the intended full-load sustained output of a facility such as a power station,Energy glossary '' Energy Information Administration''. Retrieved: 23 September 2010.Glossary '''', 2 August 2010. Retrieved: 23 September 2010. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Energy Infrastructure Completed In 1950
In physics, energy (from Ancient Greek: wikt:ἐνέργεια#Ancient_Greek, ἐνέργεια, ''enérgeia'', “activity”) is the physical quantity, quantitative physical property, property that is #Energy transfer, transferred to a physical body, body or to a physical system, recognizable in the performance of Work (thermodynamics), work and in the form of heat and light. Energy is a Conservation law, conserved quantity—the law of conservation of energy states that energy can be Energy transformation, converted in form, but not created or destroyed. The unit of measurement for energy in the International System of Units (SI) is the joule (J). Common forms of energy include the kinetic energy of a moving object, the potential energy stored by an object (for instance due to its position in a Classical field theory, field), the elastic energy stored in a solid object, chemical energy associated with chemical reactions, the radiant energy carried by electromagnetic radiat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dams Completed In 1950
A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect or store water which can be evenly distributed between locations. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees (also known as dikes) are used to manage or prevent water flow into specific land regions. The earliest known dam is the Jawa Dam in Jordan, dating to 3,000 BC. The word ''dam'' can be traced back to Middle English, and before that, from Middle Dutch, as seen in the names of many old cities, such as Amsterdam and Rotterdam. History Ancient dams Early dam building took place in Mesopotamia and the Middle East. Dams were used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buttress Dams
A buttress is an architectural structure built against or projecting from a wall which serves to support or reinforce the wall. Buttresses are fairly common on more ancient buildings, as a means of providing support to act against the lateral (sideways) forces arising out of inadequately braced roof structures. The term ''counterfort'' can be synonymous with buttress and is often used when referring to dams, retaining walls and other structures holding back earth. Early examples of buttresses are found on the Eanna Temple (ancient Uruk), dating to as early as the 4th millennium BC. Terminology In addition to flying and ordinary buttresses, brick and masonry buttresses that support wall corners can be classified according to their ground plan. A clasping or clamped buttress has an L shaped ground plan surrounding the corner, an angled buttress has two buttresses meeting at the corner, a setback buttress is similar to an angled buttress but the buttresses are set back from the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroelectric Power Stations In Portugal
Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dams In Portugal
This page is a list of dams and reservoirs in Portugal, arranged by NUTS Regions and Subregions: Norte Alto Tâmega * Alto Tâmega Dam * Daivões Dam * Gouvães Dam Cávado * Caniçada Dam, Parada do Bouro, Vieira do Minho * Salamonde Dam, Salamonde, Vieira do Minho * Vilarinho das Furnas Dam, Campo do Gerês, Terras de Bouro Douro * Cuerda del Pozo Dam * Los Rábanos Dam * San José Dam * Villalcampo Dam * Castro Dam * Miranda Dam * Picote Dam * Bemposta Dam * Aldeadávila Dam * Saucelle Dam * Pocinho Dam * Valeira Dam São João da Pesqueira, São João da Pesqueira * Régua Dam * Carrapatelo Dam, Santa Cristina, Mesão Frio * Crestuma–Lever Dam * Bagaúste Dam, Peso da Régua, Peso da Régua Grande Porto * Crestuma–Lever Dam, Foz do Sousa, Gondomar Minho-Lima * Alto Lindoso Dam, Lindoso, Ponte da Barca Centro Beiras e Serra da Estrela * Sabugal Dam, Sabugal, Sabugal * Barragem Marques da Silva, Seia Beira Baixa * Cabril Dam, Sertã * Fratel Dam, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Dams And Reservoirs In Portugal
This page is a list of dams and reservoirs in Portugal, arranged by NUTS Regions and Subregions: Norte Alto Tâmega * Alto Tâmega Dam * Daivões Dam * Gouvães Dam Cávado * Caniçada Dam, Parada do Bouro, Vieira do Minho * Salamonde Dam, Salamonde, Vieira do Minho * Vilarinho das Furnas Dam, Campo do Gerês, Terras de Bouro Douro * Cuerda del Pozo Dam * Los Rábanos Dam * San José Dam * Villalcampo Dam * Castro Dam * Miranda Dam * Picote Dam * Bemposta Dam * Aldeadávila Dam * Saucelle Dam * Pocinho Dam * Valeira Dam São João da Pesqueira, São João da Pesqueira * Régua Dam * Carrapatelo Dam, Santa Cristina, Mesão Frio * Crestuma–Lever Dam * Bagaúste Dam, Peso da Régua, Peso da Régua Grande Porto * Crestuma–Lever Dam, Foz do Sousa, Gondomar Minho-Lima * Alto Lindoso Dam, Lindoso, Ponte da Barca Centro Beiras e Serra da Estrela * Sabugal Dam, Sabugal, Sabugal * Barragem Marques da Silva, Seia Beira Baixa * Cabril Dam, Sertã * Fratel Dam, V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Power Stations In Portugal ...
The following page lists some power stations in Portugal. Cogeneration Geothermal Hydroelectric Thermal See also * List of power stations in Europe * List of largest power stations in the world References {{commons category, Power plants in Portugal Portugal Power stations A power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the generation of electric power. Power stations are generally connected to an electrical grid. Many po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraulic Head
Hydraulic head or piezometric head is a specific measurement of liquid pressure above a vertical datum., 410 pages. See pp. 43–44., 650 pages. See p. 22. It is usually measured as a liquid surface elevation, expressed in units of length, at the entrance (or bottom) of a piezometer. In an aquifer, it can be calculated from the depth to water in a piezometric well (a specialized water well), and given information of the piezometer's elevation and screen depth. Hydraulic head can similarly be measured in a column of water using a standpipe piezometer by measuring the height of the water surface in the tube relative to a common datum. The hydraulic head can be used to determine a ''hydraulic gradient'' between two or more points. "Head" in fluid dynamics In fluid dynamics, ''head'' is a concept that relates the energy in an incompressible fluid to the height of an equivalent static column of that fluid. From Bernoulli's principle, the total energy at a given point in a fluid i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francis Turbine
The Francis turbine is a type of water turbine. It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the most common water turbine in use today, and can achieve over 95% efficiency. The process of arriving at the modern Francis runner design took from 1848 to approximately 1920. It became known as the Francis turbine around 1920, being named after British-American engineer James B. Francis who in 1848 created a new turbine design. Francis turbines are primarily used for producing electricity. The power output of the electric generators generally ranges from just a few kilowatts up to 1000 MW, though mini-hydro installations may be lower. The best performance is seen when the head height is between . Penstock diameters are between . The speeds of different turbine units range from 70 to 1000 rpm. A wicket gate around the outside of the turbine's rotating runner controls the rate of water flow through the turbine for d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megawatt
The watt (symbol: W) is the unit of Power (physics), power or radiant flux in the International System of Units, International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantification (science), quantify the rate of Energy transformation, energy transfer. The watt is named after James Watt (1736–1819), an 18th-century Scottish people, Scottish invention, inventor, mechanical engineer, and chemist who improved the Newcomen steam engine, Newcomen engine with his own Watt steam engine, steam engine in 1776. Watt's invention was fundamental for the Industrial Revolution. Overview When an object's velocity is held constant at one metre per second against a constant opposing force of one Newton (unit), newton, the rate at which Work (physics), work is done is one watt. : \mathrm In terms of electromagnetism, one watt is the rate at which electrical work is performed when a current of one ampere (A) flows across an electrical potentia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
