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Qorlortorsuaq Dam
Qorlortorsuaq Dam is a hydroelectric dam near Qorlortorsuaq in the Nanortalik district of the Kujalleq municipality in southern Greenland. It has a capacity of 7.2 MW and it generates power for the neighbouring towns of Qaqortoq and Narsaq. History The construction of the power plant started in December 2003 and was completed in October 2007. It was built by consortium of E. Pihl & Son AS (51%), YIT (34%), and Landsvirkjun (15%). Landsvirkjun operates the power plant until 2012, when operation will be transferred to the Kujalleq municipality. The design and engineering was performed by Icelandic companies Verkís and Efla. Description Qorlortorsuaq Dam is a concrete gravity dam with height of and crest length of . It creates a reservoir with a capacity of 108 million cubic meters. Its tunnel length is and pressure pipe is . The flow rate is . The power plant as two horizontal axis Francis turbines manufactured by Kössler with a total installed capacity ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenland
Greenland ( kl, Kalaallit Nunaat, ; da, Grønland, ) is an island country in North America that is part of the Kingdom of Denmark. It is located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland is the world's largest island. It is one of three constituent countries that form the Kingdom of Denmark, along with Denmark and the Faroe Islands; the citizens of these countries are all citizens of Denmark and the European Union. Greenland's capital is Nuuk. Though a part of the continent of North America, Greenland has been politically and culturally associated with Europe (specifically Norway and Denmark, the colonial powers) for more than a millennium, beginning in 986.The Fate of Greenland's Vikings , by Dale Mackenzie Brown, ''Archaeological Institute of America'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nukissiorfiit
Nukissiorfiit is a government-owned Greenland energy company. Nukissiorfiit means "where energies are created". The company supplies most of Greenland with electricity, water and heat. Most of the electricity is produced by hydro power such as the Qorlortorsuaq Dam. 70% of Greenland's energy is produced by renewable sources. The rest is produced by oil burned plants. The company employs 400 people, spread on 17 cities and 54 villages. There is a lot of potential yet unbuilt hydro power. However the rugged terrain, the fjords and the usually short distance between the ice sheet and fjords means there are many short small rivers, meaning benefit per power plant is smaller. A port and a road must be built for each one. In the winter rivers are frozen, so dams are needed to create water flow during winter. Sometimes power lines must cross fjords with spans like the Ameralik Span The Ameralik Span is the longest span of an electrical overhead power line in the world. It is situated ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landsvirkjun
Landsvirkjun, () the National Power Company of Iceland, is Iceland's largest electricity generator. Landsvirkjun operates 18 power plants in Iceland concentrated on five main areas of operation. History Landsvirkjun was founded on 1 July 1965 by the state of Iceland and the city of Reykjavík. The city of Reykjavík contributed to the company three power stations on the Sog River. Shortly after its founding construction on the Búrfell hydropower station began. From 1965 until 2005 the purpose of Landsvirkjun was to produce and distribute high voltage electricity. The municipality of Akureyri acquired a 5% share in Landsvirkjun in 1983 and became the third owner. Three hydropower stations on the Laxá River previously owned by the municipality of Akureyri were merged into Landsvirkjun. The hydropower stations Búrfell, Sigalda, Hrauneyjafoss, Blanda, Sultartangi, Vatnsfell, and Fljótsdalsstöð were all built by Landsvirkjun. The geothermal power station Krafla came under Lan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroelectric
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] |
Qorlortorsuaq
Qorlortorsuaq is a village in the Nanortalik district, in the Kujalleq municipality in southern Greenland, located at the site of the largest waterfall A waterfall is a point in a river or stream where water flows over a vertical drop or a series of steep drops. Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf. Waterfalls can be formed in several wa ... in the country; the waterfall also goes by the name of Qorlortorsuaq. In 2020, the town had only 4 inhabitants. The population consists mostly of farmers. Qorlortorsuaq also houses the only trout farm in the country Qorlortorsuaq is a location of the Qorlortorsuaq hydroelectric dam. The hydropower plant is part of the focus of the government of Greenland to replace fossil fuelled power plants with renewable energy, and is only one of a number of hydroelectric projects planned for construction. The plant has made it possible to decommission the three aging diesel generators, so call ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kujalleq
Kujalleq ( Greenlandic: , da, Den Syden, lit=The South) is a municipality on the southern tip of Greenland, operational from 1 January 2009. The administrative center of the municipality is in Qaqortoq (formerly called Julianehåb). Creation The municipality consists of the former municipalities of southern Greenland, each named after the biggest settlement: * Nanortalik Municipality * Narsaq Municipality * Qaqortoq Municipality In addition to the area of these municipalities, uninhabited parts of the former municipalities of Paamiut and Ammassalik were added to the new administrative entity. In the case of Paamiut Municipality, it was exclusively a part of the ice sheet including a few nunataks, while in the case of Ammassalik Municipality, it included the coast from the fjord Kangerlussuatsiaq (in Danish ''Lindenow Fjord'') on the old border with Nanortalik Municipality in the south to north of Timmiarmiut. Coat of arms The coat of arms of the municipality depicts a ram's h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qaqortoq
Qaqortoq, formerly Julianehåb, is a city in the Kujalleq municipalities of Greenland, municipality in southern Greenland, located near Cape Thorvaldsen. With a population of 3,050 in 2020, it is the most populous town and the municipal capital in southern Greenland and the fourth or list of cities in Greenland, fifth-largest town on the island. History The area around Qaqortoq has been inhabited since prehistoric times. Beginning with the Saqqaq culture roughly 4,300 years ago, the area has had a continuous human presence. Saqqaq culture The earliest signs of population presence are from roughly 4,300 before Present, years ago. While Saqqaq-era sites are generally the most numerous of all the prehistoric sites in Greenland, around Qaqortoq the Saqqaq presence is less prominent, with only sporadic sites and items such as chipped stone drills and carving knives. Dorset culture The Dorset people arrived in the Qaqortoq area around 2,800 years ago. Several rectangular peat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Narsaq
Narsaq is a town in the Kujalleq municipality in southern Greenland. The name ''Narsaq'' is Kalaallisut for "Plain", referring to the shore of Tunulliarfik Fjord where the town is located. History People have lived in the area for thousands of years, but not continuously. Remains of the Norse settlement can be found in the area. The church ruins of Dyrnæs can be found on the north-western outskirts of the town. The Landnám homestead, ''Landnamsgaarden'', can be found immediately to the west of the town. Dated to the year 1000, the homestead is among the oldest of the Norse ruins in the area. Excavation of the ruins began in 1953 with the discovery of the Narsaq stick, the first Viking Age runic inscription discovered in Greenland. The wider Narsaq area has some of the most striking Norse artefacts and ruins. Erik the Red's Brattahlid is located in present-day Qassiarsuk, and the Gardar bishop seat is in present-day Igaliku. Present day Narsaq was founded as Nordprøven (" ... [...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] |
Igaliko Fjord
Igaliku is a settlement in the Kujalleq municipality in southern Greenland. The town was founded as Igaliko in 1783 by the trader and colonial administrator Anders Olsen and Greenlandic wife Tuperna. In 2020, Igaliku had 21 inhabitants. The nearby Norse ruins of Garðar and the farms surrounding the town were inscribed on the UNESCO World Heritage List in 2017 as part of the Kujataa Greenland: Norse and Inuit Farming at the Edge of the Ice Cap site. Geography Igaliku is located southeast of Narsarsuaq, on a peninsula jutting off the mainland of Greenland near the eastern shore of upper Tunulliarfik Fjord.Ivittuut/Narsarsuaq/Qaqortoq, Saga Map, Tage Schjøtt, 1992 Access to Igaliku from Narsarsauq is cheaper and easier by landing at the small harbor of Itilleq and then crossing the isthmus 4 km (2.5 mi). Landmarks and sights Igaliku is best known for the ruins of Garðar, once the religious heart of 12th-century Norse Greenland. The area was at the very ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Span (architecture)
Span is the distance between two intermediate supports for a structure, e.g. a beam (structure), beam or a bridge. A span can be closed by a solid beam or by a rope. The first kind is used for bridges, the second one for power lines, overhead telecommunication lines, some type of Antenna (radio), antennas or for aerial tramways. The span is a significant factor in finding the strength and size of a beam as it determines the maximum bending moment and Deflection (engineering), deflection. The maximum bending moment M_ and deflection \delta_in the pictured beam is found using: :M_ = \frac :\delta_ = \frac = \frac where :q = Uniformly distributed load :L = Length of the beam between two supports (span) :E = Modulus of elasticity :I = Area moment of inertia Note that the maximum bending moment and deflection occur midway between the two supports. From this it follows that if the span is doubled, the maximum moment (and with it the tensile stress, stress) will quadruple, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroelectric Power Stations In Greenland
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] |
