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83-507: There were some projects for the installation of hydroelectric power plants by Jirama in the 1970s, but they were never completed. In 2002 another project, for a plant of 6 kW capacity by Jirama in cooperation with the French EDF , German RWE , GTZ and Canadian Hydro-Québec , was launched. It was stopped in 2009 due to the Malagasy political crisis . This article related to

166-415: A breech-loading gun with a strong, rifled barrel made from wrought iron wrapped around a steel inner lining, designed to fire a shell rather than a ball . In 1855 he had a five-pounder ready for inspection by a government committee. The gun proved successful in trials, but the committee thought a higher calibre gun was needed, so Armstrong built an 18-pounder on the same design. After trials, this gun

249-737: A greenhouse gas . According to the World Commission on Dams report, where the reservoir is large compared to the generating capacity (less than 100 watts per square metre of surface area) and no clearing of the forests in the area was undertaken prior to impoundment of the reservoir, greenhouse gas emissions from the reservoir may be higher than those of a conventional oil-fired thermal generation plant. In boreal reservoirs of Canada and Northern Europe, however, greenhouse gas emissions are typically only 2% to 8% of any kind of conventional fossil-fuel thermal generation. A new class of underwater logging operation that targets drowned forests can mitigate

332-463: A low-head hydro power plant with hydrostatic head of few meters to few tens of meters can be classified either as an SHP or an LHP. The other distinction between SHP and LHP is the degree of the water flow regulation: a typical SHP primarily uses the natural water discharge with very little regulation in comparison to an LHP. Therefore, the term SHP is frequently used as a synonym for the run-of-the-river power plant . The largest power producers in

415-421: A flood and fail. Changes in the amount of river flow will correlate with the amount of energy produced by a dam. Lower river flows will reduce the amount of live storage in a reservoir therefore reducing the amount of water that can be used for hydroelectricity. The result of diminished river flow can be power shortages in areas that depend heavily on hydroelectric power. The risk of flow shortage may increase as

498-485: A great deal of opposition to the gun arose, both inside the army and from rival arms manufacturers, particularly Joseph Whitworth of Manchester . Stories were publicised that the new gun was too difficult to use, that it was too expensive, that it was dangerous to use, that it frequently needed repair and so on. All of this smacked of a concerted campaign against Armstrong. Armstrong was able to refute all of these claims in front of various government committees, but he found

581-538: 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. However, when constructed in lowland rainforest areas, where part of

664-809: A large natural height difference between two waterways, such as a waterfall or mountain lake. A tunnel is constructed to take water from the high reservoir to the generating hall built in a cavern near the lowest point of the water tunnel and a horizontal tailrace taking water away to the lower outlet waterway. A simple formula for approximating electric power production at a hydroelectric station is: P = − η   ( m ˙ g   Δ h ) = − η   ( ( ρ V ˙ )   g   Δ h ) {\displaystyle P=-\eta \ ({\dot {m}}g\ \Delta h)=-\eta \ ((\rho {\dot {V}})\ g\ \Delta h)} where Efficiency

747-451: A larger amount of methane than those in temperate areas. Like other non-fossil fuel sources, hydropower also has no emissions of sulfur dioxide, nitrogen oxides, or other particulates. Reservoirs created by hydroelectric schemes often provide facilities for water sports , and become tourist attractions themselves. In some countries, aquaculture in reservoirs is common. Multi-use dams installed for irrigation support agriculture with

830-514: A partner in Donkin's business and the firm became Donkin, Stable and Armstrong. Armstrong married Margaret Ramshaw in 1835, and they built a house in Jesmond Dene , on the eastern edge of Newcastle. Armstrong worked for eleven years as a solicitor, but during his spare time he showed great interest in engineering, developing the " Armstrong Hydroelectric Machine " between 1840 and 1842. In 1837, he laid

913-586: A positive risk adjusted return, unless appropriate risk management measures are put in place. While many hydroelectric projects supply public electricity networks, some are created to serve specific industrial enterprises. Dedicated hydroelectric projects are often built to provide the substantial amounts of electricity needed for aluminium electrolytic plants, for example. The Grand Coulee Dam switched to support Alcoa aluminium in Bellingham, Washington , United States for American World War II airplanes before it

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996-545: A relatively constant water supply. Large hydro dams can control floods, which would otherwise affect people living downstream of the project. Managing dams which are also used for other purposes, such as irrigation , is complicated. In 2021 the IEA called for "robust sustainability standards for all hydropower development with streamlined rules and regulations". Large reservoirs associated with traditional hydroelectric power stations result in submersion of extensive areas upstream of

1079-526: A result of climate change . One study from the Colorado River in the United States suggest that modest climate changes, such as an increase in temperature in 2 degree Celsius resulting in a 10% decline in precipitation, might reduce river run-off by up to 40%. Brazil in particular is vulnerable due to its heavy reliance on hydroelectricity, as increasing temperatures, lower water flow and alterations in

1162-540: A river in Madagascar is a stub . You can help Misplaced Pages by expanding it . Hydroelectric power plants Hydroelectricity , or hydroelectric power , is electricity generated from hydropower (water power). Hydropower supplies 15% of the world's electricity , almost 4,210 TWh in 2023, 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

1245-519: A rotary engine powered by water, and this was built in the High Bridge works of his friend Henry Watson. Little interest was shown in the engine. Armstrong subsequently developed a piston engine instead of a rotary one and decided that it might be suitable for driving a hydraulic crane . In 1846 his work as an amateur scientist was recognized when he was elected a Fellow of the Royal Society . In 1845

1328-464: A scheme was set in motion to provide piped water from distant reservoirs to the households of Newcastle. Armstrong was involved in this scheme and he proposed to Newcastle Corporation that the excess water pressure in the lower part of town could be used to power a quayside crane specially adapted by himself. He claimed that his hydraulic crane could unload ships faster and more cheaply than conventional cranes. The Corporation agreed to his suggestion, and

1411-459: A separate company, called Elswick Ordnance Company , in which he had no financial involvement. The new company agreed to manufacture armaments for the British government and no other. Under his new position, Armstrong worked to bring the old Woolwich Arsenal up to date so that it could build guns designed at Elswick. However, just when it looked as if the new gun was about to become a great success,

1494-605: A shipbuilder in Low Walker, whereby Mitchells would build warships and Elswick would provide the guns. The first ship, in 1868 was HMS Staunch , a gunboat . In 1876, because the 18th-century bridge at Newcastle restricted access by ships to the Elswick works, Armstrong's company paid for a new Swing Bridge to be built, so that warships could have their guns fitted at Elswick. In 1882 Armstrong's company merged with Mitchell's to form Sir William Armstrong, Mitchell and Co. Ltd. and in 1884

1577-536: A shipyard opened at Elswick to specialise in warship production. The first vessels produced were the torpedo cruisers Panther and Leopard for the Austro-Hungarian Navy . The first battleship produced at Elswick was HMS Victoria , launched in 1887. The ship was originally to be named Renown , but the name was changed in honour of the Queen's Golden Jubilee. Armstrong drove the first and last rivets. The ship

1660-448: A small TV/radio). Even smaller turbines of 200–300 W may power a few homes in a developing country with a drop of only 1 m (3 ft). A Pico-hydro setup is typically run-of-the-river , meaning that dams are not used, but rather pipes divert some of the flow, drop this down a gradient, and through the turbine before returning it to the stream. An underground power station is generally used at large facilities and makes use of

1743-455: A source of low-cost renewable energy. Alternatively, small hydro projects may be built in isolated areas that would be uneconomic to serve from a grid, or in areas where there is no national electrical distribution network. Since small hydro projects usually have minimal reservoirs and civil construction work, they are seen as having a relatively low environmental impact compared to large hydro. This decreased environmental impact depends strongly on

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1826-414: A start-up time of the order of a few minutes. Although battery power is quicker its capacity is tiny compared to hydro. It takes less than 10 minutes to bring most hydro units from cold start-up to full load; this is quicker than nuclear and almost all fossil fuel power. Power generation can also be decreased quickly when there is a surplus power generation. Hence the limited capacity of hydropower units

1909-538: A supply of water at pressure – for instance, the Grimsby Dock Tower . However, when supplying cranes for use at New Holland on the Humber Estuary , he was unable to do this because the foundations consisted of sand. After much careful thought he produced the weighted accumulator , a cast-iron cylinder fitted with a plunger supporting a very heavy weight. The plunger would slowly be raised, drawing in water, until

1992-581: A total of 1,500 terawatt-hours (TWh) of electrical energy in one full cycle" which was "about 170 times more energy than the global fleet of pumped storage hydropower plants". Battery storage capacity is not expected to overtake pumped storage during the 2020s. When used as peak power to meet demand, hydroelectricity has a higher value than baseload power and a much higher value compared to intermittent energy sources such as wind and solar. Hydroelectric stations have long economic lives, with some plants still in service after 50–100 years. Operating labor cost

2075-577: A year's worth of rain fell within 24 hours (see 1975 Banqiao Dam failure ). The resulting flood resulted in the deaths of 26,000 people, and another 145,000 from epidemics. Millions were left homeless. The creation of a dam in a geologically inappropriate location may cause disasters such as 1963 disaster at Vajont Dam in Italy, where almost 2,000 people died. William Armstrong, 1st Baron Armstrong William George Armstrong, 1st Baron Armstrong , CB FRS (26 November 1810 – 27 December 1900)

2158-448: Is hydroelectric power on a scale serving a small community or industrial plant. The definition of a small hydro project varies but a generating capacity of up to 10 megawatts (MW) is generally accepted as the upper limit. This may be stretched to 25 MW and 30 MW in Canada and the United States. Small hydro stations may be connected to conventional electrical distribution networks as

2241-627: Is also usually low, as plants are automated and have few personnel on site during normal operation. Where a dam serves multiple purposes, a hydroelectric station may be added with relatively low construction cost, providing a useful revenue stream to offset the costs of dam operation. It has been calculated that the sale of electricity from the Three Gorges Dam will cover the construction costs after 5 to 8 years of full generation. However, some data shows that in most countries large hydropower dams will be too costly and take too long to build to deliver

2324-466: Is highest in the winter when solar energy is at a minimum. Pico hydro is hydroelectric power generation of under 5 kW . It is useful in small, remote communities that require only a small amount of electricity. For example, the 1.1 kW Intermediate Technology Development Group Pico Hydro Project in Kenya supplies 57 homes with very small electric loads (e.g., a couple of lights and a phone charger, or

2407-445: Is initially produced during construction of the project, and some methane is given off annually by reservoirs, hydro has one of the lowest lifecycle greenhouse gas emissions for electricity generation. The low greenhouse gas impact of hydroelectricity is found especially in temperate climates . Greater greenhouse gas emission impacts are found in the tropical regions because the reservoirs of power stations in tropical regions produce

2490-478: Is no evidence that Armstrong agonised over his decision to go into armament production. He once said: "If I thought that war would be fomented, or the interests of humanity suffer, by what I have done, I would greatly regret it. I have no such apprehension." He also said: "It is our province, as engineers to make the forces of matter obedient to the will of man; those who use the means we supply must be responsible for their legitimate application." Armstrong advocated

2573-462: Is not an energy source, and appears as a negative number in listings. Run-of-the-river hydroelectric stations are those with small or no reservoir capacity, so that only the water coming from upstream is available for generation at that moment, and any oversupply must pass unused. A constant supply of water from a lake or existing reservoir upstream is a significant advantage in choosing sites for run-of-the-river. A tidal power station makes use of

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2656-452: Is not generally used to produce base power except for vacating the flood pool or meeting downstream needs. Instead, it can serve as backup for non-hydro generators. The major advantage of conventional hydroelectric dams with reservoirs is their ability to store water at low cost for dispatch later as high value clean electricity. In 2021, the IEA estimated that the "reservoirs of all existing conventional hydropower plants combined can store

2739-479: Is now demolished, and not to be confused with the nearby Jesmond Dene House . Armstrong's house was to the west of Jesmond Dene , Newcastle, and thus not far from his birthplace, and he began to landscape and improve land that he bought within the Dene. In 1860 he paid local architect John Dobson to design a Banqueting Hall overlooking the Dene, which still survives, though it is now roofless. His house close to Newcastle

2822-410: Is often higher (that is, closer to 1) with larger and more modern turbines. Annual electric energy production depends on the available water supply. In some installations, the water flow rate can vary by a factor of 10:1 over the course of a year. Hydropower is a flexible source of electricity since stations can be ramped up and down very quickly to adapt to changing energy demands. Hydro turbines have

2905-517: The American Civil War was unfounded. In 1864 the two companies, W. G. Armstrong & Company and Elswick Ordnance Company merged to form Sir W. G. Armstrong & Company. Armstrong had resigned from his employment with the War Office, so there was no longer a conflict of interest. The company turned its attention to naval guns. In 1867 Armstrong reached an agreement with Charles Mitchell ,

2988-657: The Bonneville Dam in 1937 and being recognized by the Flood Control Act of 1936 as the premier federal flood control agency. Hydroelectric power stations continued to become larger throughout the 20th century. Hydropower was referred to as "white coal". Hoover Dam 's initial 1,345 MW power station was the world's largest hydroelectric power station in 1936; it was eclipsed by the 6,809 MW Grand Coulee Dam in 1942. The Itaipu Dam opened in 1984 in South America as

3071-533: The Industrial Revolution would drive development as well. In 1878, the world's first hydroelectric power scheme was developed at Cragside in Northumberland , England, by William Armstrong . It was used to power a single arc lamp in his art gallery. The old Schoelkopf Power Station No. 1 , US, near Niagara Falls , began to produce electricity in 1881. The first Edison hydroelectric power station,

3154-778: The International Exhibition of Hydropower and Tourism , with over one million visitors 1925. By 1920, when 40% of the power produced in the United States was hydroelectric, the Federal Power Act was enacted into law. The Act created the Federal Power Commission to regulate hydroelectric power stations on federal land and water. As the power stations became larger, their associated dams developed additional purposes, including flood control , irrigation and navigation . Federal funding became necessary for large-scale development, and federally owned corporations, such as

3237-569: The Pandon Dene , was rural. His father, also called William , was a corn merchant on the Newcastle quayside, who rose through the ranks of Newcastle society to become mayor of the town in 1850. An elder sister, Anne, born in 1802, was named after his mother, the daughter of Addison Potter. Armstrong was educated at the Royal Grammar School, Newcastle upon Tyne , until he was sixteen, when he

3320-605: The Tennessee Valley Authority (1933) and the Bonneville Power Administration (1937) were created. Additionally, the Bureau of Reclamation which had begun a series of western US irrigation projects in the early 20th century, was now constructing large hydroelectric projects such as the 1928 Hoover Dam . The United States Army Corps of Engineers was also involved in hydroelectric development, completing

3403-569: The Vulcan Street Plant , began operating September 30, 1882, in Appleton, Wisconsin , with an output of about 12.5 kilowatts. By 1886 there were 45 hydroelectric power stations in the United States and Canada; and by 1889 there were 200 in the United States alone. At the beginning of the 20th century, many small hydroelectric power stations were being constructed by commercial companies in mountains near metropolitan areas. Grenoble , France held

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3486-417: The cruiser as a naval vessel. There was great rivalry and dislike between Noble and Rendel, which became open after Armstrong's death. From 1863 onwards, although Armstrong remained the head of his company, he became less involved in its day-to-day running. He appointed several very able men to senior positions and they continued his work. When he married, he acquired a house called Jesmond Dean (sic), which

3569-506: The potential energy of dammed water driving a water turbine and generator . The power extracted from the water depends on the volume and on the difference in height between the source and the water's outflow. This height difference is called the head . A large pipe (the " penstock ") delivers water from the reservoir to the turbine. This method produces electricity to supply high peak demands by moving water between reservoirs at different elevations. At times of low electrical demand,

3652-400: The water frame , and continuous production played a significant part in the development of the factory system, with modern employment practices. In the 1840s, hydraulic power networks were developed to generate and transmit hydro power to end users. By the late 19th century, the electrical generator was developed and could now be coupled with hydraulics. The growing demand arising from

3735-463: The IEA released a main-case forecast of 141 GW generated by hydropower over 2022–2027, which is slightly lower than deployment achieved from 2017–2022. Because environmental permitting and construction times are long, they estimate hydropower potential will remain limited, with only an additional 40 GW deemed possible in the accelerated case. In 2021 the IEA said that major modernisation refurbishments are required. Most hydroelectric power comes from

3818-464: The ability to transport particles heavier than itself downstream. This has a negative effect on dams and subsequently their power stations, particularly those on rivers or within catchment areas with high siltation. Siltation can fill a reservoir and reduce its capacity to control floods along with causing additional horizontal pressure on the upstream portion of the dam. Eventually, some reservoirs can become full of sediment and useless or over-top during

3901-517: The amazing power of 4,000 horses acting for nearly nine hours every day". Armstrong donated the long wooded gorge of Jesmond Dene to the people of the city of Newcastle upon Tyne in 1883, as well as Armstrong Bridge and Armstrong Park nearby. He was involved in the foundation in 1871 of the College of Physical Science – a forerunner of the University of Newcastle , renamed Armstrong College in 1906. He

3984-595: The balance between stream flow and power production. Micro hydro means hydroelectric power installations that typically produce up to 100 kW of power. These installations can provide power to an isolated home or small community, or are sometimes connected to electric power networks. There are many of these installations around the world, particularly in developing nations as they can provide an economical source of energy without purchase of fuel. Micro hydro systems complement photovoltaic solar energy systems because in many areas water flow, and thus available hydro power,

4067-600: The city of Newcastle. He retained his house next to the Dene. Armstrong entertained several eminent guests at Cragside, including the Shah of Persia , the King of Siam , the prime minister of China and the Prince and Princess of Wales . In 1873 he served as High Sheriff of Northumberland . He was President of the North of England Institute of Mining and Mechanical Engineers from 1872 to 1875. He

4150-406: The company merged with the company of Armstrong's old rival, Joseph Whitworth, and became Sir W. G. Armstrong, Whitworth & Co Ltd. Whitworth was by this time dead. Armstrong gathered many excellent engineers at Elswick. Notable among them were Andrew Noble and George Wightwick Rendel , whose design of gun-mountings and hydraulic control of gun-turrets were adopted worldwide. Rendel introduced

4233-483: The constant criticism very wearying and depressing. In 1862 the government decided to stop ordering the new gun and return to muzzle loaders. Also, because of a drop in demand, future orders for guns would be supplied from Woolwich, leaving Elswick without new business. Compensation was eventually agreed with the government for the loss of business to the company, which went on legitimately to sell its products to foreign powers. Speculation that guns were sold to both sides in

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4316-404: The daily rise and fall of ocean water due to tides; such sources are highly predictable, and if conditions permit construction of reservoirs, can also be dispatchable to generate power during high demand periods. Less common types of hydro schemes use water's kinetic energy or undammed sources such as undershot water wheels . Tidal power is viable in a relatively small number of locations around

4399-505: The dams, sometimes destroying biologically rich and productive lowland and riverine valley forests, marshland and grasslands. Damming interrupts the flow of rivers and can harm local ecosystems, and building large dams and reservoirs often involves displacing people and wildlife. The loss of land is often exacerbated by habitat fragmentation of surrounding areas caused by the reservoir. Hydroelectric projects can be disruptive to surrounding aquatic ecosystems both upstream and downstream of

4482-576: The downward force of the weight was sufficient to force the water below it into pipes at great pressure. The accumulator was a very significant, if unspectacular, invention, which found many applications in the following years. In 1854, during the Crimean War , Armstrong read about the difficulties the British Army experienced in manoeuvring its heavy field guns. He decided to design a lighter, more mobile field gun, with greater range and accuracy. He built

4565-690: The effect of forest decay. Another disadvantage of hydroelectric dams is the need to relocate the people living where the reservoirs are planned. In 2000, the World Commission on Dams estimated that dams had physically displaced 40–80 million people worldwide. Because large conventional dammed-hydro facilities hold back large volumes of water, a failure due to poor construction, natural disasters or sabotage can be catastrophic to downriver settlements and infrastructure. During Typhoon Nina in 1975 Banqiao Dam in Southern China failed when more than

4648-399: The excess generation capacity is used to pump water into the higher reservoir, thus providing demand side response . When the demand becomes greater, water is released back into the lower reservoir through a turbine. In 2021 pumped-storage schemes provided almost 85% of the world's 190 GW of grid energy storage and improve the daily capacity factor of the generation system. Pumped storage

4731-457: The experiment proved so successful that three more hydraulic cranes were installed on the Quayside. The success of his hydraulic crane led Armstrong to consider setting up a business to manufacture cranes and other hydraulic equipment. He therefore resigned from his legal practice. Donkin, his legal colleague, supported him in his career move, providing financial backing for the new venture. In 1847

4814-537: The firm of W. G. Armstrong & Company bought 5.5 acres (22,000 m ) of land alongside the river at Elswick , near Newcastle, and began to build a factory there. The new company received orders for hydraulic cranes from Edinburgh and Northern Railways and from Liverpool Docks , as well as for hydraulic machinery for dock gates in Grimsby . The company soon began to expand. In 1850 the company produced 45 cranes and two years later, 75. It averaged 100 cranes per year for

4897-534: The forest is inundated, substantial amounts of greenhouse gases may be emitted. Construction of a hydroelectric complex can have significant environmental impact, principally in loss of arable land and population displacement. They also disrupt the natural ecology of the river involved, affecting habitats and ecosystems, and siltation and erosion patterns. While dams can ameliorate the risks of flooding, dam failure can be catastrophic. In 2021, global installed hydropower electrical capacity reached almost 1,400 GW,

4980-500: The foundations for the engineering and environmental consultancy which is today known as Wardell Armstrong. Armstrong was a very keen angler, and while fishing on the River Dee at Dentdale in the Pennines , he saw a waterwheel in action, supplying power to a marble quarry. It struck Armstrong that much of the available power was being wasted. When he returned to Newcastle, he designed

5063-506: The highest among all renewable energy technologies. Hydroelectricity plays a leading role in countries like Brazil, Norway and China. but there are geographical limits and environmental issues. Tidal power can be used in coastal regions. China added 24 GW in 2022, accounting for nearly three-quarters of global hydropower capacity additions. Europe added 2 GW, the largest amount for the region since 1990. Meanwhile, globally, hydropower generation increased by 70 TWh (up 2%) in 2022 and remains

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5146-497: The house was the first in the world to be lit by hydro-electricity, using incandescent lamps provided by the inventor Joseph Swan . As Armstrong spent less and less time at the Elswick works, he spent more and more time at Cragside, and it became his main home. In 1869 he commissioned the celebrated architect Richard Norman Shaw to enlarge and improve the house, and this was done over a period of 15 years. In 1883 Armstrong gave Jesmond Dene , together with its banqueting hall to

5229-593: The land cleared and supervised the building of a house perched on a ledge of rock, overlooking the burn. He also supervised a programme of planting trees and mosses so as to cover the rocky hillside with vegetation. His new house was called Cragside , and over the years Armstrong added to the Cragside estate. Eventually the estate was 1,729 acres (7.00 km ) and had seven million trees planted, together with five artificial lakes and 31 miles (50 km) of carriage drives. The lakes were used to generate hydro-electricity, and

5312-519: The largest renewable energy source, surpassing all other technologies combined. Hydropower has been used since ancient times to grind flour and perform other tasks. In the late 18th century hydraulic power provided the energy source needed for the start of the Industrial Revolution . In the mid-1700s, French engineer Bernard Forest de Bélidor published Architecture Hydraulique , which described vertical- and horizontal-axis hydraulic machines, and in 1771 Richard Arkwright 's combination of water power ,

5395-731: The largest, producing 14 GW , but was surpassed in 2008 by the Three Gorges Dam in China at 22.5 GW . Hydroelectricity would eventually supply some countries, including Norway , Democratic Republic of the Congo , Paraguay and Brazil , with over 85% of their electricity. In 2021 the International Energy Agency (IEA) said that more efforts are needed to help limit climate change . Some countries have highly developed their hydropower potential and have very little room for growth: Switzerland produces 88% of its potential and Mexico 80%. In 2022,

5478-633: The plant site. Generation of hydroelectric power changes the downstream river environment. Water exiting a turbine usually contains very little suspended sediment, which can lead to scouring of river beds and loss of riverbanks. The turbines also will kill large portions of the fauna passing through, for instance 70% of the eel passing a turbine will perish immediately. Since turbine gates are often opened intermittently, rapid or even daily fluctuations in river flow are observed. Drought and seasonal changes in rainfall can severely limit hydropower. Water may also be lost by evaporation. When water flows it has

5561-450: The rainfall regime, could reduce total energy production by 7% annually by the end of the century. Lower positive impacts are found in the tropical regions. In lowland rainforest areas, where inundation of a part of the forest is necessary, it has been noted that the reservoirs of power plants produce substantial amounts of methane . This is due to plant material in flooded areas decaying in an anaerobic environment and forming methane,

5644-503: The rest of the century. In 1850 over 300 men were employed at the works, but by 1863 this had risen to 3,800. The company soon branched out into bridge building, one of the first orders being for the Inverness Bridge, completed in 1855. Armstrong was responsible for developing the hydraulic accumulator . Where water pressure was not available on site for the use of hydraulic cranes, Armstrong often built high water towers to provide

5727-400: The use of renewable energy . Stating that coal "was used wastefully and extravagantly in all its applications", he predicted in 1863 that Britain would cease to produce coal within two centuries. As well as advocating the use of hydroelectricity , he also supported solar power , stating that the amount of solar energy received by an area of 1 acre (4,000 m ) in the tropics would "exert

5810-524: The world are hydroelectric power stations, with some hydroelectric facilities capable of generating more than double the installed capacities of the current largest nuclear power stations . Although no official definition exists for the capacity range of large hydroelectric power stations, facilities from over a few hundred megawatts are generally considered large hydroelectric facilities. Currently, only seven facilities over 10 GW ( 10,000 MW ) are in operation worldwide, see table below. Small hydro

5893-539: The world. The classification of hydropower plants starts with two top-level categories: The classification of a plant as an SHP or LHP is primarily based on its nameplate capacity , the threshold varies by the country, but in any case a plant with the capacity of 50 MW or more is considered an LHP. As an example, for China, SHP power is below 25 MW, for India - below 15 MW, most of Europe - below 10 MW. The SHP and LHP categories are further subdivided into many subcategories that are not mutually exclusive. For example,

5976-519: Was knighted in 1859 after giving his gun patents to the government. In 1887, in Queen Victoria 's golden jubilee year, he was raised to the peerage as Baron Armstrong of Cragside. Armstrong was born in Newcastle upon Tyne at 9 Pleasant Row, Shieldfield , Although the house in which he was born no longer exists, an inscribed granite tablet marks the site where it stood. At that time the area, next to

6059-610: Was President of the Literary and Philosophical Society of Newcastle upon Tyne from 1860 until his death, as well as twice president of the Institution of Mechanical Engineers . Armstrong gave £11,500 towards the building of Newcastle's Hancock Natural History Museum , which was completed in 1882. This sum is equivalent to over £555,000 in 2010. Lord Armstrong's generosity extended beyond his death. In 1901 his heir, William Watson-Armstrong gave £100,000 (equivalent to £13,712,955 in 2023), for

6142-573: Was allowed to provide irrigation and power to citizens (in addition to aluminium power) after the war. In Suriname , the Brokopondo Reservoir was constructed to provide electricity for the Alcoa aluminium industry. New Zealand 's Manapouri Power Station was constructed to supply electricity to the aluminium smelter at Tiwai Point . Since hydroelectric dams do not use fuel, power generation does not produce carbon dioxide . While carbon dioxide

6225-519: Was an English engineer and industrialist who founded the Armstrong Whitworth manufacturing concern on Tyneside . He was also an eminent scientist, inventor and philanthropist. In collaboration with the architect Richard Norman Shaw , he built Cragside in Northumberland, the first house in the world to be lit by hydroelectricity. He is regarded as the inventor of modern artillery. Armstrong

6308-667: Was buried in Rothbury churchyard, alongside his wife. The couple had no children, and Armstrong's heir was his great-nephew William Watson-Armstrong . He was succeeded as chairman of the company by his one-time protégé, Andrew Noble . Such was Armstrong's fame as a gun-maker that he is thought to be a possible model for George Bernard Shaw 's arms magnate in Major Barbara . The title character in Iain Pears ' historical-mystery novel Stone's Fall also has similarities to Armstrong. There

6391-521: Was convenient for his practice as a solicitor and his work as an industrialist, but when he had more spare time he longed for a house in the country. He had often visited Rothbury as a child, when he was afflicted by a severe cough, and he had fond memories of the area. In 1863 he bought some land in a steep-sided, narrow valley where the Debdon Burn flows towards the River Coquet near Rothbury. He had

6474-498: Was declared to be superior to all its rivals. Armstrong surrendered the patent for the gun to the British government, rather than profit from its design. As a result he was created a Knight Bachelor and in 1859 was presented to Queen Victoria . Armstrong became employed as Engineer of Rifled Ordnance to the War Department . In order to avoid a conflict of interests if his own company were to manufacture armaments, Armstrong created

6557-506: Was elected as the president of the Institution of Civil Engineers in December 1881 and served in that capacity for the next year. He was conferred with Honorary Membership of the Institution of Engineers and Shipbuilders in Scotland in 1884. In 1886, he was persuaded to stand as a Unionist Liberal candidate for Newcastle , but was unsuccessful, coming third in the election. That same year he

6640-534: Was ill-fated, as she was involved in a collision with HMS Camperdown just six years later in 1893 and sank with the loss of 358 men, including Vice-Admiral Sir George Tryon . An important customer of the Elswick yard was Japan, which took several cruisers, some of which defeated the Russian fleet at the Battle of Tsushima in 1905. It was claimed that every Japanese gun used in the battle had been provided by Elswick. Elswick

6723-782: Was presented with the Freedom of the City of Newcastle . In 1887 he was raised to the peerage as Baron Armstrong , of Cragside in the County of Northumberland. His last great project, begun in 1894, was the purchase and restoration of the huge Bamburgh Castle on the Northumberland coast, which remains in the hands of the Armstrong family. His wife, Margaret, died in September 1893, at their house in Jesmond. Armstrong died at Cragside on 27 December 1900, aged ninety. He

6806-511: Was sent to Bishop Auckland Grammar School . While there, he often visited the nearby engineering works of William Ramshaw. During his visits he met his future wife, Ramshaw's daughter Margaret, six years his senior. Armstrong's father was set on his following a career in the law, and so he was articled to Armorer Donkin , a solicitor friend of his father's. He spent five years in London studying law and returned to Newcastle in 1833. In 1835 he became

6889-459: Was the only factory in the world that could build a battleship and arm it completely. The Elswick works continued to prosper, and by 1870 stretched for three-quarters of a mile along the riverside. The population of Elswick, which had been 3,539 in 1851, had increased to 27,800 by 1871. In 1894, Elswick built and installed the steam-driven pumping engines, hydraulic accumulators and hydraulic pumping engines to operate London's Tower Bridge . In 1897

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