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Imaichi Pumped Storage Plant
The Imaichi Dam (今市ダム) is a concrete gravity dam on the Togawa River located west of Nikkō in Tochigi Prefecture, Japan. The dam serves as the lower reservoir for the Imaichi Pumped Storage Power Station, while the Kuriyama Dam forms the upper. It is owned by TEPCO and was constructed between 1979 and 1986. The reservoir can store of water. Of that storage volume, can be used for power generation. Imaichi Pumped Storage Power Station The power plant operates using the pumped storage hydroelectric method. During periods of high electricity demand, water is sent from the upper Kuriyama Reservoir to the power plant which contains 3 x Francis pump turbines. Water discharged from the power plant then enters the Imaichi Reservoir. When demand is low, the pump-generators reverse mode and pump water from the lower reservoir back up to the upper. The process repeats as needed. See also * List of dams and reservoirs in Japan As a nation of islands and narrow, steep va ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tochigi Prefecture
is a prefecture of Japan located in the Kantō region of Honshu. Tochigi Prefecture has a population of 1,943,886 (1 June 2019) and has a geographic area of 6,408 km2 (2,474 sq mi). Tochigi Prefecture borders Fukushima Prefecture to the north, Gunma Prefecture to the west, Saitama Prefecture to the south, and Ibaraki Prefecture to the southeast. Utsunomiya is the capital and largest city of Tochigi Prefecture, with other major cities including Oyama, Tochigi, and Ashikaga. Tochigi Prefecture is one of only eight landlocked prefectures and its mountainous northern region is a popular tourist region in Japan. The Nasu area is known for its onsens, local sake, and ski resorts, the villa of the Imperial Family, and the station of the Shinkansen railway line. The city of Nikkō, with its ancient Shintō shrines and Buddhist temples, is a UNESCO World Heritage Site. Prefectural overview Situated among the inland prefectures of the northern part of the Kantō ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TEPCO
, also known as or TEPCO, is a Japanese electric utility holding company servicing Japan's Kantō region, Yamanashi Prefecture, and the eastern portion of Shizuoka Prefecture. This area includes Tokyo. Its headquarters are located in Uchisaiwaicho, Chiyoda, Tokyo, and international branch offices exist in Washington, D.C., and London. It is a founding member of strategic consortiums related to energy innovation and research; such as JINED, INCJ and MAI. In 2007, TEPCO was forced to shut the Kashiwazaki-Kariwa Nuclear Power Plant after the Niigata-Chuetsu-Oki earthquake. That year it posted its first loss in 28 years. Corporate losses continued until the plant reopened in 2009. Following the 2011 Tōhoku earthquake and tsunami, one of its power plants was the site of one of the world's most serious ongoing nuclear disaster, the Fukushima Daiichi nuclear disaster. TEPCO could face ¥ ($) in special losses in the current business year to March 2012, and the Japanese go ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Togawa River
Togawa (written: 戸川) is a Japanese surname. Notable people with the surname include: * (1923–1983), Japanese writer and political commentator * (born 1961), Japanese singer, musician and actress * (born 1981), Japanese footballer * (1933-2016), Japanese singer-songwriter, actress and writer See also *, train station in Goshogawara, Aomori Prefecture, Japan {{surname, Togawa Japanese-language surnames ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francis Pump 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravity Dam
A gravity dam is a dam constructed from concrete or stone masonry and designed to hold back water by using only the weight of the material and its resistance against the foundation to oppose the horizontal pressure of water pushing against it. Gravity dams are designed so that each section of the dam is stable and independent of any other dam section. Characteristics Gravity dams generally require stiff rock foundations of high bearing strength (slightly weathered to fresh), although in rare cases, they have been built on soil foundations. The bearing strength of the foundation limits the allowable position of the resultant force, influencing the overall stability. Also, the stiff nature of the gravity dam structure is unforgiving to differential foundation settlement, which can induce cracking of the dam structure. Gravity dams provide some advantages over embankment dams, the main advantage being that they can tolerate minor over-topping flows without damage, as the con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imaichi Pumped Storage Power Station
The is a large pumped-storage hydroelectric power station in Tochigi Prefecture, Japan. With a total installed capacity of , it is one of the largest pumped-storage power stations in Japan. The facility is run by the Tokyo Electric Power Company (TEPCO). The power plant started operation in July 1988 with a capacity of 350 MW (one unit operational). The other two units entered operation in December 1991. The plant is one of the many large scale pure pumped-storage plants built in Japan since the 1970s to compensate for the increased penetration of base-load nuclear power and peak load from cooling and air-conditioning. Like most pumped-storage facilities, the power station uses two reservoirs, releasing and pumping as the demand rises and falls. The upper reservoir is contained by the Imaichi Dam, a concrete gravity dam, at an altitude of 512 m. The reservoir is fed by the Togawa river. The lower reservoir is contained by the Kuriyama Dam, a rock-fill embankment dam at an a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kuriyama Dam (Tochigi)
The Kuriyama Dam is a rock-fill embankment dam on a tributary of the Togawa River located northwest of Nikkō in Tochigi Prefecture is a prefecture of Japan located in the Kantō region of Honshu. Tochigi Prefecture has a population of 1,943,886 (1 June 2019) and has a geographic area of 6,408 km2 (2,474 sq mi). Tochigi Prefecture borders Fukushima Prefecture to the ..., Japan. It was constructed between 1981 and 1985. Its reservoir serves as the upper reservoir for the 1,050 MW Imaichi Pumped Storage Power Station, while the Imaichi Dam forms the lower. The dam is tall and withholds a reservoir with a storage capacity of . Of that capacity, is used to produce electricity at the power plant. It is owned and operated by TEPCO. References {{Dams in Tochigi Prefecture Rock-filled dams Dams in Tochigi Prefecture Dams completed in 1985 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pumped Storage
Pumping may refer to: * The operation of a pump, for moving a liquid from one location to another **The use of a breast pump for extraction of milk * Pumping (audio), a creative misuse of dynamic range compression * Pumping (computer systems), the number of times data is transmitted per clock cycle * Pumping (oil well), injecting chemicals into a wellbore * Pumping (noise reduction), an unwanted artifact of some noise reduction systems * Pumping lemma In the theory of formal language In logic, mathematics, computer science, and linguistics, a formal language consists of words whose letters are taken from an alphabet and are well-formed according to a specific set of rules. The alphabet of ..., in the theory of formal languages * Gastric lavage, cleaning the contents of the stomach * Optical pumping, in which light is used to raise electrons from a lower energy level to a higher one * Pump (skateboarding), accelerating without pushing off of the ground * "Pumping" (My He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Dams And Reservoirs In Japan
As a nation of islands and narrow, steep valleys, dams play a vital role in Japanese society as they are constructed primarily to control floods, supply water and generate hydroelectric power. The tallest dam in Japan is the high Kurobe Dam. The largest dam by structural volume in the country is the Tokuyama Dam ''(pictured)'' with of rock-fill. Tokuyama also creates Japan's largest reservoir with a water volume of . The dams are arranged by prefecture in the list below. Chubu region * Aichi * Fukui * Gifu * Ishikawa * Nagano * Niigata * Shizuoka * Toyama * Yamanashi Chugoku region * Hiroshima * Okayama * Shimane * Tottori * Yamaguchi Kansai region * Hyogo * Kyoto * Mie * Nara * Osaka * Shiga * Wakayama Kanto region * Chiba * Gunma * Ibaraki * Kanagawa * Saitama * Tochigi * Tokyo Kyushu region * Fukuoka * Kagoshima * Kumamoto * Miyazaki * Nagasaki * Okinawa * Oita * Saga Hokkaido region * Hokkaido Shikoku region * Ehime * Kagawa * Kochi * Tokushima T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dams Completed In 1986
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 u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dams In Tochigi Prefecture
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 us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
