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Porjus Hydroelectric Power Station
Porjus power station ( sv, Porjus kraftverk) is one of the oldest and largest power plants in Sweden, situated near Porjus. It was built 1910-1915 and has a power of 480 MW. Besides three-phase AC, the plant originally also generated single phase 15 Hz AC for railway traction and hence, two single-phase 80 kV power lines ran along the Iron Ore Line Malmbanan where it was transformed down to 16 kV in substations. However this system was later abandoned in favor of rotary converter stations. The original machines for single phase AC were subsequently scrapped. The construction of the Porjus power station out in the wilderness is considered a pioneering achievement. The material for the founding work had to be carried in backpacks over a 44 km (3000 feet) trail in uninhabited land before any infrastructure was built. In the early 1970s, a new power station was built but the old monumental brick building has been kept as a cultural heritage site with most of the machinery in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweden
Sweden, ; fi, Ruotsi; fit, Ruotti; se, Ruoŧŧa; smj, Svierik; sje, Sverji; sju, Sverje; sma, Sveerje or ; yi, שוועדן, Shvedn; rmu, Svedikko; rmf, Sveittiko. formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic country and the List of European countries by area, fifth-largest country in Europe. The Capital city, capital and largest city is Stockholm. Sweden has a population of 10.5 million, and a low population density of ; around 87% of Swedes reside in urban areas in the central and southern half of the country. Sweden’s urban areas together cover 1.5% of its land area. Because the country is so long, ranging from 55th parallel north, 55°N to 69th parallel north, 69°N, the climate of Sweden is diverse. Sweden has been inhabited since Prehistoric Sweden, prehistoric times, . T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porjus
Porjus is a locality situated in Jokkmokk Municipality, Norrbotten County, Sweden with 328 inhabitants in 2010. Geographically it is situated by the shores of Lule River at 499 meter height. Porjus is known for having one of the oldest hydropower plants in Sweden ( Porjus kraftverk - Porjus hydroelectric power station), built 1910–1915. The power plant was built to deliver electricity to the building of the railroad between Luleå and Narvik, where the mining industry shipped iron ore. Today, Porjus is a living village and the old power plant is a popular tourist attraction among many others. Swedish power company Vattenfall is the biggest employer, but there are also a number of smaller companies such as the small aviation companFiskflyg which offered the first regular passenger flights in Sweden back in the days (the route: Porjus - Suorva). There is also a unique golf course (you play across the Lule river, next to a big dam), a small downhill skiing course, snowmobile ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overhead Power Line
An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy across large distances. It consists of one or more uninsulated electrical cables (commonly multiples of three for three-phase power) suspended by towers or poles. Since most of the insulation is provided by the surrounding air, overhead power lines are generally the least costly method of power transmission for large quantities of electric energy. Construction Towers for support of the lines are made of wood either grown or laminated, steel or aluminum (either lattice structures or tubular poles), concrete, and occasionally reinforced plastics. The bare wire conductors on the line are generally made of aluminum (either plain or reinforced with steel or composite materials such as carbon and glass fiber), though some copper wires are used in medium-voltage distribution and low-voltage connections to customer premises. A major goal of overhead power li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iron Ore Line
The Iron Ore Line ( sv, Malmbanan) is a long railway line between Riksgränsen and Boden in Norrbotten County, Sweden, owned by Trafikverket (the Swedish Transport Administration). The line also contains two branches, from Kiruna to Svappavaara and from Gällivare to Koskullskulle. The term is often colloquially used to also include the Ofoten Line, from Riksgränsen to Narvik in Norway, and the northernmost part of the Main Line Through Upper Norrland from Boden to Luleå. The railway from Narvik to Luleå is long. The line is dominated by the ore freight trains operated by LKAB's subsidiary Malmtrafik from their mines to the Port of Narvik and the Port of Luleå. In addition, SJ operates passenger trains and CargoNet operates container freight trains. The Iron Ore Line is single track, electrified at and has a permitted axle load of . The Swedish part of the line is the northernmost railway in Sweden and the Norwegian part outside Narvik is the northernmost ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Dam Of Porjus Water Power Plant, Jokkmokk, Lappland, Sweden (9664010748) (2)
''The'' () is a grammatical article in English, denoting persons or things that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English. ''The'' is the most frequently used word in the English language; studies and analyses of texts have found it to account for seven percent of all printed English-language words. It is derived from gendered articles in Old English which combined in Middle English and now has a single form used with nouns of any gender. The word can be used with both singular and plural nouns, and with a noun that starts with any letter. This is different from many other languages, which have different forms of the definite article for different genders or numbers. Pronunciation In most dialects, "the" is pronounced as (with the voiced dental fricative followed by a schwa) when followed by a consonant sound, and as (homophone of the archaic p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vattenfall
Vattenfall is a Swedish multinational power company owned by the Swedish State. Beyond Sweden, the company generates power in Denmark, Finland, Germany, the Netherlands, and the United Kingdom. The company's name is Swedish for " waterfall", and is an abbreviation of its original name, Royal Waterfall Board (''Kungliga Vattenfallstyrelsen''). History Vattenfall (then called ''Kungliga Vattenfallsstyrelsen'' or Royal Waterfall Board) was founded in 1909 as a state-owned enterprise in Sweden. From its founding until the mid-1970s, Vattenfall's business was largely restricted to Sweden, with a focus on hydroelectric power generation. Only in 1974 did the company begin to build nuclear reactors in Sweden (the Ringhals 1 and 2 reactors), eventually owning seven of Sweden's 12 reactors. In 1992, Vattenfall was reformed as the limited liability company Vattenfall AB. At the same time, the transmission grid (220 kV and 400 kV lines) was transferred to the newly formed state agency Sv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Bearing
A magnetic bearing is a type of bearing that supports a load using magnetic levitation. Magnetic bearings support moving parts without physical contact. For instance, they are able to levitate a rotating shaft and permit relative motion with very low friction and no mechanical wear. Magnetic bearings support the highest speeds of any kind of bearing and have no maximum relative speed. Active bearings have several advantages: they do not suffer from wear, have low friction, and can often accommodate irregularities in the mass distribution automatically, allowing rotors to spin around their center of mass with very low vibration. Passive magnetic bearings use permanent magnets and, therefore, do not require any input power but are difficult to design due to the limitations described by Earnshaw's theorem. Techniques using diamagnetic materials are relatively undeveloped and strongly depend on material characteristics. As a result, most magnetic bearings are active magnetic bea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ny Teknik
''Ny Teknik'' (meaning ''New Technology'' in English) is a weekly Swedish magazine with news, debates and ads in the field of technology and engineering. It is published in Stockholm, Sweden. History and profile ''Ny Teknik'' was launched on 18 October 1967. Its former publisher was Ekonomi och Teknik Förlag AB. The magazine is headquartered in Stockholm and is published by Talentum Sweden. It is distributed to all members of The Swedish Association of Graduate Engineers. The magazine mostly covered news about inventions until 1997 when a new section, Frontlinjen (meaning Front Line), was started to feature news on technological research. The magazine also includes news on the effects of technology on society, IT and telecom. As of 2006 the editor-in-chief was Lars Nilsson. Susanna Baltscheffsky also served as the editor-in-chief. Jan Huss is the editor-in-chief of the magazine. Corresponding publications are ''Ingeniøren'' in Denmark, ''Teknisk Ukeblad'' in Norway and '' Te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroelectric Power Stations In Sweden
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] |
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