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64-619: The Reece Power Station is a conventional hydroelectric power station located in the West Coast region of Tasmania , Australia. Part of the Pieman River scheme that comprises four hydroelectric power stations, the Reece Power Station is the final station in the scheme, before the water runs out to sea. The power station is located aboveground at the foot of the rock-filled concrete faced Reece Dam (also called
128-745: 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
192-463: 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
256-447: A businessman and innovator was widely recognized in his own time. The spinning frame was a large advance over Hargreaves 's spinning jenny , in that very little training was required to operate the machinery, which produced a strong yarn suitable for warp threads. To strengthen his position in relation to his many competitors and emulators, Arkwright obtained a "grand patent" in 1775, which he hoped would consolidate his position within
320-670: A cotton mill (this was used to replenish the millpond that drove the mill's waterwheel rather than to drive the machinery directly ). He was invited to Scotland , where he assisted David Dale in establishing cotton mills at New Lanark . A large mill of Arkwright's at Birkacre in Lancashire, was destroyed in the anti-machinery riots of 1779. Aggressive and self-sufficient, Arkwright was a difficult man to work with. He bought out all his partners and went on to build factories at Manchester , Matlock Bath , New Lanark (in partnership with David Dale) and elsewhere. Unlike many entrepreneurs of
384-426: 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
448-421: 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
512-809: 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
576-451: 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
640-407: A patent for a new carding engine, which converted raw cotton to a continuous skein prior to spinning. The machine used a succession of uneven rollers rotating at increasingly higher speeds to draw out the roving , before applying a twist via a bobbin-and-flyer mechanism. It could make cotton thread thin and strong enough for the warp threads of cloth . Arkwright and John Smalley of Preston set up
704-592: 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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#1732776134861768-548: 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
832-540: 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
896-576: A shop at Churchgate in Bolton in the early 1760s. It was here that he invented a waterproof dye for use on the fashionable periwigs of the time, the income from which later funded his prototype cotton machinery. Arkwright married his first wife, Patience Holt, in 1755. They had a son, Richard Arkwright Junior , who was born the same year. Patience died in 1756, and then in 1761 Arkwright, aged 29, married Margaret Biggins. They had three children, of whom only Susannah survived to adulthood. At some time after
960-448: 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
1024-512: A small horse-driven factory at Nottingham . To obtain capital for expansion, Arkwright formed a partnership with Jedediah Strutt and Samuel Need, wealthy nonconformist hosiery manufacturers. In 1771, the partners built the world's first water-powered mill at Cromford , which covered both carding and spinning operations and employed 200 people. In 1776 Arkwright built a second, larger mill at Cromford and, soon afterwards, mills at Bakewell , Wirksworth and elsewhere (see below ). His success as
1088-455: 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
1152-414: 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
1216-581: 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
1280-512: 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. Richard Arkwright Sir Richard Arkwright (23 December 1732 – 3 August 1792)
1344-435: 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 a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has
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#17327761348611408-452: 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
1472-635: 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
1536-681: Is fed to TasNetworks ' transmission grid via a 13.8 k V /220 kV Fuji generator transformer to the outdoor switchyard. Both the power station and the dam are named in honour of Eric Reece , the Premier of Tasmania between 1958 and 1969 and again between 1972 and 1975. Reece was a firm proponent of the Hydro-Electric Commission and the development of hydroelectricity in Tasmania. Hydroelectricity#Conventional (dams) Hydroelectricity , or hydroelectric power ,
1600-470: 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
1664-445: 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
1728-462: 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
1792-452: 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
1856-410: 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
1920-679: 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
1984-549: 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,
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2048-806: 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
2112-633: 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
2176-583: 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
2240-506: 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,
2304-437: The spinning frame , a machine which produced twisted threads (initially for warps only), using wooden and metal cylinders rather than human fingers. This machine, initially powered by horses (see below ), greatly reduced the cost of cotton-spinning, and would lead to major changes in the textile industry. Lewis Paul had invented a machine for carding in 1748. Arkwright made improvements to this machine and in 1775 took out
2368-400: 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
2432-463: 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
2496-621: The Lower Pieman Dam) which forms Lake Pieman . Water from the lake is fed to the power station into two independent 250-metre (820 ft)-long tunnels. The power station was commissioned in 1986 and 1987 by the Hydro Electric Corporation (TAS) and the station has two Fuji Francis turbines , with a combined generating capacity of 238 megawatts (319,000 hp) of electricity. The station output, estimated to be 1,025 gigawatt-hours (3,690 TJ) annually,
2560-464: 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
2624-595: 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,
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2688-404: 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
2752-505: 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
2816-403: The death of his first wife, Arkwright became interested in the development of carding and spinning machinery to replace hand labour in the conversion of raw cotton to thread for weaving. In 1768, Arkwright and John Kay , a clockmaker, returned to Preston, renting rooms in a house on Stoneygate (now called Arkwright House ), where they worked on a spinning machine. In 1769 Arkwright patented
2880-705: 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
2944-399: 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
3008-557: The expansion of the mill at Cromford, it soon became apparent that the existing population of the town would be inadequate to provide the labour needed for the scale of operations which Arkwright was planning. He therefore brought in workers from outside the locality, building a cluster of cottages near the mill to house them (he also built the Greyhound public house, which still stands in Cromford market square). Stuart Fisher states that
3072-487: The fast-growing cotton industry. Public opinion, however, was bitterly hostile to exclusive patents, and in 1781 Arkwright initiated legal proceedings to assert his rights. The case dragged on in court until 1785, when it was finally settled against him on the grounds that his specifications were deficient: the court had also heard assertions that the spinning frame was actually the invention of Arkwright's employee John Kay , or of Thomas Highs , Kay's previous employer. With
3136-534: 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,
3200-506: 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
3264-519: 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 ,
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#17327761348613328-750: 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,
3392-633: 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
3456-450: 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,
3520-469: The time who were nonconformist, he was a member of the Church of England . Arkwright served as High Sheriff of Derbyshire and was knighted in 1786. He also built Willersley Castle , now a Grade II* listed building , in 1791; after a fire in 1792, it was rebuilt and occupied by his son Richard Arkwright junior starting in 1796. Arkwright died at Rock House, Cromford, on 3 August 1792, aged 59, leaving
3584-652: The town. After establishing the mill at Cromford, Arkwright returned to Lancashire and took up a lease of the Birkacre mill at Chorley , which was to become a catalyst for the town's growth into one of the most important industrialised towns of the Industrial Revolution. In 1777 Arkwright leased the Haarlem Mill in Wirksworth, Derbyshire, where he installed the first steam engine to be used in
3648-403: The workers' homes are now considered to be "the first factory housing development in the world". Arkwright instigated novel and highly disciplined working arrangements at Cromford. Work was organised in two 13-hour shifts per day, including an overlap for the change of shift. Bells rang at 5 am and 5 pm and the gates were shut precisely at 6 am and 6 p.m.: anyone who was late
3712-524: 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
3776-539: 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,
3840-461: The youngest of seven surviving children. His father, Thomas, was a tailor and a Preston Guild burgess . Richard's parents, Sarah and Thomas, could not afford to send him to school and instead arranged for him to be taught to read and write by his cousin Ellen. He was apprenticed to a Mr Nicholson, a barber at the nearby town of Kirkham , and began his working life as a barber and wig-maker, setting up
3904-586: 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
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#17327761348613968-467: Was an English inventor and a leading entrepreneur during the early Industrial Revolution . He is credited as the driving force behind the development of the spinning frame , known as the water frame after it was adapted to use water power ; and he patented a rotary carding engine to convert raw cotton to 'cotton lap' prior to spinning. He was the first to develop factories housing both mechanised carding and spinning operations. Arkwright's achievement
4032-445: Was excluded from work for the rest of the day and lost an extra day's pay. Arkwright encouraged weavers with large families to move to Cromford. Whole families were employed, including large numbers of children as young as seven (subsequently increased to ten); and towards the end of his tenure, nearly two-thirds of the 1,150 employees were children. He allowed employees a week's holiday a year, on condition that they did not travel beyond
4096-611: Was to combine power, machinery, semi-skilled labour and the new raw material of cotton to create mass-produced yarn . His organisational skills earned him the accolade "father of the modern industrial factory system," notably through the methods developed in his mill at Cromford , Derbyshire (now preserved as part of the Derwent Valley Mills World Heritage Site). Richard Arkwright was born in Preston , Lancashire , England on 23 December 1732,
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