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Water Turbines
A water turbine is a rotary machine that converts kinetic energy and potential energy of water into mechanical work. Water turbines were developed in the 19th century and were widely used for industrial power prior to electrical grids. Now, they are mostly used for electric power generation. Water turbines are mostly found in dams to generate electric power from water potential energy. History Water wheels have been used for hundreds of years for industrial power. Their main shortcoming is size, which limits the flow rate and head (hydraulic), head that can be harnessed. The migration from water wheels to modern turbines took about one hundred years. Development occurred during the Industrial Revolution, using scientific principles and methods. They also made extensive use of new materials and manufacturing methods developed at the time. Swirl The word turbine was introduced by the French engineer Claude Burdin in the early 19th century and is derived from the Greek w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Testour
Testour ( ') is a town located in the north of Tunisia. The town is perched on the hills of Medjerda Valley, south-west of Medjez-el-Bab, the crossroads between Tunis, Béja, and the north of Tunisia. It was known during the Roman period, as Tichilla, which means the ''green grass'' as it is situated in the mouth of Siliana valley. It was rebuilt in the 1500s by Muslim and Jewish refugees from Andalusia who gave it a distinctive character in building and layout. Today it is a popular pilgrimage for Jews who visit Rabbi Fraji Chawat's tomb. The city host an international festival of Malouf and traditional Maghrebi music since 1967. Twin towns – sister cities Testour is twinned with: * Chefchaouen, Morocco * Serpa, Portugal * Gibellina, Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uriah A
Uriah or Uriyah () is a Hebrew given name. It may refer to: People In the Bible *Uriah the Hittite, a soldier in King David's army in the Books of Samuel * Uriah (Book of Kings), a priest under Ahaz in the Books of Kings * Uriah (prophet), a prophet murdered by Jehoiakim in the Book of Jeremiah *Uriah, a priest and the father of Meremoth in the Book of Ezra (8:33) and Book of Nehemiah (3:4, 21) *Uriah, a priest whom God offers to call as a witness in the Book of Isaiah (8:2) Other people * Uriah F. Abshier (1849–1934), American politician and businessman * (born 1982), Dutch actor and stand-up comedian * Uriah Asante (1992–2016), Ghanaian footballer * Uriah Duffy (born 1975), American bassist *Urijah Faber (born 1979), American mixed martial arts fighter *Uriah Hall (born 1984), Jamaican mixed martial arts fighter * Uriah P. Levy (1792–1862), American naval commander * Uriah Hunt Painter (1837–1900), American journalist * Uriah Rennie (1959–2025), English football refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benoît Fourneyron
Benoît Fourneyron (31 October 1802 – 31 July 1867) was a French engineer, born in Saint-Étienne, Loire. Fourneyron made significant contributions to the development of water turbines. Benoît Fourneyron was educated at the École Nationale Supérieure des Mines de Saint-Étienne, a nearby engineering school that had recently opened. After he graduated in 1816, he spent the next few years in mines and ironworks. Around this time, a number of French engineers—including some of Fourneyron's former teachers—were starting to apply the mathematical techniques of modern science to the ancient mechanism called the waterwheel. For centuries, waterwheels had been used to convert the energy of streams into mechanical power, mostly for milling grain. But the new machines of the Industrial Revolution required more power, and by the 1820s there was enormous interest in making waterwheels more efficient. Fourneyron-style turbines Using the proposal of a former teacher (Claude Bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean-Victor Poncelet
Jean-Victor Poncelet (; 1 July 1788 – 22 December 1867) was a French engineer and mathematician who served most notably as the Commanding General of the . He is considered a reviver of projective geometry, and his work ''Traité des propriétés projectives des figures'' is considered the first definitive text on the subject since Gérard Desargues' work on it in the 17th century. He later wrote an introduction to it: ''Applications d'analyse et de géométrie''. As a mathematician, his most notable work was in projective geometry, although an early collaboration with Charles Julien Brianchon provided a significant contribution to Feuerbach's theorem. He also made discoveries about projective harmonic conjugates; relating these to the poles and polar lines associated with conic sections. He developed the concept of parallel lines meeting at a point at infinity and defined the circular points at infinity that are on every circle of the plane. These discoveries led to the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ponce, Puerto Rico
Ponce ( , , ) is a city and a Municipalities of Puerto Rico, municipality on the southern coast of Puerto Rico. The most populated city outside the San Juan, Puerto Rico, San Juan metropolitan area, Ponce was founded on August 12, 1692Some publications/reporters have erroneously stated Ponce's date of founding as December 12, 1692 (see, for example, Jose Fernandez-Colon, The Associated Press, at "Noticias Online" on January 24, 2009, a''Noticias Puerto Rico.''Accessed 23 March 2019.) Another incorrect date sometimes found is September 12, 1692 (See, for example, Jorge L. Perez (El Nuevo Dia) and Jorge Figueroa (Ponce Municipal Historian), a''Historic Buildings and Structures in Ponce, Puerto Rico.'' at the text accompanying Drawing #20, titled "Tumba de los Bomberos". Puerto Rico Historic Buildings Drawings Society. 2019. Accessed 4 February 2019. See als''Mapa de Municipios y Barrios: Ponce, Memoria Numero 27.'' Gobierno del Estado Libre Asociado de Puerto Rico. Junta de Planifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hacienda Buena Vista
Hacienda Buena Vista, also known as Hacienda Vives (or Buena Vista Plantation in English), was a coffee plantation located in Barrio Magueyes, Ponce, Puerto Rico. The original plantation dates from the 19th century. The plantation was started by Don Salvador de Vives in 1833.''Hacienda Buena Vista.'' Fideicomiso de Conservación de Puerto Rico. 2016. Accessed 30 May 2016.''Hacienda Buena Vista.'' Arlene Pabón. U.S. National Park Service: National Register of Historic Places Registration Form. Page 7. Puerto Rico State Historic Preservation Office. 9 September 1994. Accessed 30 May 2016. The |
Euler
Leonhard Euler ( ; ; ; 15 April 170718 September 1783) was a Swiss polymath who was active as a mathematician, physicist, astronomer, logician, geographer, and engineer. He founded the studies of graph theory and topology and made influential discoveries in many other branches of mathematics, such as analytic number theory, complex analysis, and infinitesimal calculus. He also introduced much of modern mathematical terminology and notation, including the notion of a mathematical function. He is known for his work in mechanics, fluid dynamics, optics, astronomy, and music theory. Euler has been called a "universal genius" who "was fully equipped with almost unlimited powers of imagination, intellectual gifts and extraordinary memory". He spent most of his adult life in Saint Petersburg, Russia, and in Berlin, then the capital of Prussia. Euler is credited for popularizing the Greek letter \pi (lowercase pi) to denote the ratio of a circle's circumference to its diameter, as we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kingdom Of Hungary
The Kingdom of Hungary was a monarchy in Central Europe that existed for nearly a millennium, from 1000 to 1946 and was a key part of the Habsburg monarchy from 1526-1918. The Principality of Hungary emerged as a Christian kingdom upon the Coronation of the Hungarian monarch, coronation of the first king Stephen I of Hungary, Stephen I at Esztergom around the year 1000;Kristó Gyula – Barta János – Gergely Jenő: Magyarország története előidőktől 2000-ig (History of Hungary from the prehistory to 2000), Pannonica Kiadó, Budapest, 2002, , pp. 37, 113, 678 ("Magyarország a 12. század második felére jelentős európai tényezővé, középhatalommá vált."/"By the 12th century Hungary became an important European factor, became a middle power.", "A Nyugat részévé vált Magyarország.../Hungary became part of the West"), pp. 616–644 his family (the Árpád dynasty) led the monarchy for 300 years. By the 12th century, the kingdom became a European power. Du ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Segner Wheel
The Segner wheel or Segner turbine is a type of water turbine invented by Johann Andreas Segner in the 18th century. It uses the same principle as Hero's aeolipile. The device is placed in a suitable hole in the ground (or at the slope of a hill). The water is delivered to the top of a vertical cylinder, at the bottom of which is a rotor with specially bent pipes with nozzles (see image). Due to the hydrostatic pressure, the water is ejected from the nozzles, causing the rotor to rotate. The useful torque is transferred to a powered device through a belt and pulley system. Segner turbines, also called reaction or Scotch turbines, were built in the mid-1850s to power the inclined plane lifts along the Morris Canal in New Jersey. Today, the Segner wheel principle is used in irrigation sprinklers. Alexander Bogdanov cited this an example of an important innovation which paved the way for the development of steam engines. The turbine at Museo Hacienda Buena Vista is "the only p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Andreas Segner
Johann Andreas von Segner (, , , ; October 9, 1704 – October 5, 1777) was a Hungarian scientist of German descent. He was born in the Kingdom of Hungary, in the former Hungarian capital city of Pozsony, or Pressburg (today Bratislava). Early life and education Johann Segner was born to Johann Michael von Segner and his wife Christine von Segner (née Fischer) on probably the 10 October 1704. Other sources mention also the 4 or the 9 October. His father was a tax clerk. His paternal ancestors came from Styria to Pressburg in the Kingdom of Hungary; by the 18th century. In 1596 the family was granted nobility for their military accomplishments by Rudolph II. He studied at Pressburg and Debrecen. In April 1725, Segner began studying at the University of Jena. Under the guidance of Georg Erhard Hamberger, Segner developed an evidence for the cartesian rule of signs. In his third year at Jena, he began to teach other students in mathematics. During his stay in Jena, he was sup ... [...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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
