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32-674: Staythorpe C Power Station is a 1,735  MWe gas-fired power station at Staythorpe between Southwell and Newark-on-Trent in Nottinghamshire , England, between the River Trent and Nottingham to Lincoln railway line . The station was handed over to the owner RWE from Alstom Power with full commercial operation being achieved in December 2010. The official opening ceremony attended by Charles Hendry , Minister of State took place on 9 May 2011. The £680 million plant

64-558: A light bulb with a power rating of 100 W is turned on for one hour, the energy used is 100 watt hours (W·h), 0.1 kilowatt hour, or 360  kJ . This same amount of energy would light a 40-watt bulb for 2.5 hours, or a 50-watt bulb for 2 hours. Power stations are rated using units of power, typically megawatts or gigawatts (for example, the Three Gorges Dam in China is rated at approximately 22 gigawatts). This reflects

96-484: A 288 MWe Alstom gas turbine , heat recovery steam generator and steam turbine . From 1968 until 2000, a CEGB 2,000 MW oil-fired Hinton Heavies power station existed on the site of the current power station. The station had four 500 MW turbo-alternators . The boilers delivered 1,788 kg/s of steam to the turbines at 158.6 bar and 538 °C. Sea water was used for station cooling. There were 3 × 25 MW auxiliary gas turbine electricity generators on

128-633: A CCGT power station at Pembroke when proposals for LNG terminals at Milford Haven brought high pressure natural gas infrastructure to the area. A public exhibition was held in Pembroke Town Hall in February 2005, outlining the proposal to build the £800 million power station in support of the company's planning application. The contractor was Alstom. The ATEX inspection was conducted by the French notified body LCIE. Construction began in 2008 and

160-518: A branch off the adjacent Nottingham and Lincoln railway line. Rail facilities included a west-facing junction on the mainline, eleven sidings, a coal hopper, a locomotive shed and a run-round loop. The cooling water system enabled the abstraction of up to 104,600 m/h (23 million gallons per hour) of water from the River Trent. Planning permission was given for the gas-fired power station as early as 1993, and construction originally began in 1998 by

192-484: A gross generating capability of 360 MW and a net capability of 336 MW. The John Brown pulverised fuel boilers produced a maximum of 324 kg/s of steam delivered to the turbines at 103.4 bar and 538 °C. Staythorpe B was one of the CEGB’s twenty steam power stations with the highest thermal efficiency ; in 1963–4 the thermal efficiency was 33.28 per cent, 33.54 per cent in 1964–5, and 33.83 per cent in 1965–6. Cooling of

224-483: A period of one year: equivalent to approximately 114 megawatts of constant power output. The watt-second is a unit of energy, equal to the joule . One kilowatt hour is 3,600,000 watt seconds. While a watt per hour is a unit of rate of change of power with time, it is not correct to refer to a watt (or watt-hour) as a watt per hour. Pembroke Power Station It is a CCGT -type power station that uses natural gas. There are five 400 MW modules, each with

256-541: A turbine, which generates 648 MW e (i.e. electricity). Other SI prefixes are sometimes used, for example gigawatt electrical (GW e ). The International Bureau of Weights and Measures , which maintains the SI-standard, states that further information about a quantity should not be attached to the unit symbol but instead to the quantity symbol (e.g., P th = 270 W rather than P = 270 W th ) and so these unit symbols are non-SI. In compliance with SI,

288-495: A unit of time, namely 1 J/s. In this new definition, 1 absolute watt = 1.00019 international watts. Texts written before 1948 are likely to be using the international watt, which implies caution when comparing numerical values from this period with the post-1948 watt. In 1960, the 11th General Conference on Weights and Measures adopted the absolute watt into the International System of Units (SI) as

320-508: Is generated using Alstom TOPGAS hydrogen-cooled generators . The plant was designed for a thermal efficiency of around 58%. MWe The watt (symbol: W ) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m ⋅s . It is used to quantify the rate of energy transfer . The watt is named in honor of James Watt (1736–1819), an 18th-century Scottish inventor , mechanical engineer , and chemist who improved

352-733: Is named after the Scottish inventor James Watt . The unit name was proposed by C. William Siemens in August 1882 in his President's Address to the Fifty-Second Congress of the British Association for the Advancement of Science . Noting that units in the practical system of units were named after leading physicists, Siemens proposed that watt might be an appropriate name for a unit of power. Siemens defined

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384-566: Is owned by the German energy company, RWE . It is the second largest Combined Cycle Gas Turbine (CCGT) power station in the UK and has an overall efficiency in excess of 58%. Staythorpe C was built on the site of two former CEGB coal-fired power stations , the 360 MW Staythorpe A and the 360 MW Staythorpe B. Staythorpe A was authorised in 1946 and commenced by Derbyshire & Nottinghamshire Electric Power Company. In 1948, electricity supply

416-523: Is the rate at which electrical work is performed when a current of one ampere (A) flows across an electrical potential difference of one volt (V), meaning the watt is equivalent to the volt-ampere (the latter unit, however, is used for a different quantity from the real power of an electrical circuit). 1   W = 1   V ⋅ A . {\displaystyle \mathrm {1~W=1~V{\cdot }A} .} Two additional unit conversions for watt can be found using

448-825: The Newcomen engine with his own steam engine in 1776. Watt's invention was fundamental for the Industrial Revolution . When an object's velocity is held constant at one meter per second against a constant opposing force of one newton , the rate at which work is done is one watt. 1   W = 1   J / s = 1   N ⋅ m / s = 1   k g ⋅ m 2 ⋅ s − 3 . {\displaystyle \mathrm {1~W=1~J{/}s=1~N{\cdot }m{/}s=1~kg{\cdot }m^{2}{\cdot }s^{-3}} .} In terms of electromagnetism , one watt

480-567: The Pembroke site, these were first commissioned in November 1969. The generating capacity, electricity output, load factor and thermal efficiency were as shown in the table. The electricity supply data, in GWh, is shown graphically. The high output in 1984/5 was associated with the 1984/5 Miners' Strike , and the shortage of coal for coal-fired power stations . The performance data for

512-470: The above equation and Ohm's law . 1   W = 1   V 2 / Ω = 1   A 2 ⋅ Ω , {\displaystyle \mathrm {1~W=1~V^{2}/\Omega =1~A^{2}{\cdot }\Omega } ,} where ohm ( Ω {\displaystyle \Omega } ) is the SI derived unit of electrical resistance . The watt

544-638: The consulting engineers Balfour, Beatty & Co Ltd. The electricity output, in GWh , is shown in the graph and the installed capacity and output of the power station are shown in the table. The station was closed on 31 October 1983 and had a generating capacity of 112 MW. Staythorpe B was commissioned in May 1962 by the Central Electricity Generating Board . It had three 120 MW Metropolitan Vickers turbo-alternators giving

576-515: The energy company Ørsted A/S uses the unit megawatt for produced electrical power and the equivalent unit megajoule per second for delivered heating power in a combined heat and power station such as Avedøre Power Station . When describing alternating current (AC) electricity, another distinction is made between the watt and the volt-ampere . While these units are equivalent for simple resistive circuits , they differ when loads exhibit electrical reactance . Radio stations usually report

608-470: The gas turbine generators is summarised in the following table. The plant was mothballed by National Power in 1996 when the company proposed to use the controversial fuel Orimulsion . The company changed its mind in the face of fierce opposition and the plant closed in 1997 with the loss of 300 jobs. National Power put the site up for sale in July 2000. Demolition of the old power station began in 2000 and

640-631: The matter and the local MP attempted to raise awareness of the issue by mentioning it in Parliament but with little success. Alstom took on most (if not all) of the local subcontractors and paid all wages due and has since won its case against Somi in a high court judgement. In December 2012, the European Commission sent a notice of infringement to the British government. The notice lists 18 separate violations of four EU laws regarding

672-460: The maximum power output it can achieve at any point in time. A power station's annual energy output, however, would be recorded using units of energy (not power), typically gigawatt hours. Major energy production or consumption is often expressed as terawatt hours for a given period; often a calendar year or financial year. One terawatt hour of energy is equal to a sustained power delivery of one terawatt for one hour, or approximately 114 megawatts for

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704-488: The power of their transmitters in units of watts, referring to the effective radiated power . This refers to the power that a half-wave dipole antenna would need to radiate to match the intensity of the transmitter's main lobe . The terms power and energy are closely related but distinct physical quantities. Power is the rate at which energy is generated or consumed and hence is measured in units (e.g. watts) that represent energy per unit time . For example, when

736-788: The previous owner National Power , temporarily ceasing in 2000 due to market saturation and low returns on electricity generation (high gas costs versus low electricity prices). Construction restarted in early 2008, after RWE decided to proceed with Staythorpe in May 2007 in preference to development at an alternate site at Pembroke Power Station in Wales. The Pembroke site was given the go ahead to proceed alongside Staythorpe in February 2009 once environmental conditions were assured to be met. The project at Staythorpe will be constructed under an Engineering, procurement and construction (EPC) contract by Alstom Power. The electricity 400 kV ZA transmission line from Staythorpe to Grendon, Northamptonshire

768-401: The station was by river water and cooling towers constructed by Davenport Engineering. The station had a single chimney. The annual electricity output of Staythorpe B was: Staythorpe B closed in 1994 with a generating capacity of 354 MW. There is still a large substation next to the site of the former power stations, and a monument. Staythorpe B power station was supplied with coal via

800-569: The unit of power. In the electric power industry , megawatt electrical ( MWe or MW e ) refers by convention to the electric power produced by a generator, while megawatt thermal or thermal megawatt (MWt, MW t , or MWth, MW th ) refers to thermal power produced by the plant. For example, the Embalse nuclear power plant in Argentina uses a fission reactor to generate 2,109 MW t (i.e. heat), which creates steam to drive

832-570: The unit within the existing system of practical units as "the power conveyed by a current of an Ampère through the difference of potential of a Volt". In October 1908, at the International Conference on Electric Units and Standards in London, so-called international definitions were established for practical electrical units. Siemens' definition was adopted as the international watt. (Also used: 1 A × 1 Ω.) The watt

864-467: Was commissioned in July 1950, followed by the other units in April 1952, December 1953, December 1955 and August 1956. The 16 coal-fired Babcock and Wilcox CTM Highhead spreader stoker boilers produced a maximum of 480 kg/s of steam delivered to the turbines at 62.1 bar and 482 °C. Cooling of the station was by river water. The station had three chimneys.The architect was T. Cecil Howitt FRIBA and

896-479: Was completed by 2003. National Power first proposed a CCGT power plant on the site in 1997. This plan lasted until it chose to build Staythorpe instead. A former member of staff, and his spouse through washing asbestos laden overalls, later died in 2012 and 2022 from mesothelioma as a result of negligence at the plant between 1969 and 1982. Their family received compensation through legal action. In 2005, RWE (formerly National Power ) revived plans to build

928-402: Was completed by mid-2012. The power station employs around 100 people. During the construction of the power station a contractual dispute broke out between the main contractor Alstom Power and one of its mechanical subcontractors, Somi. The dispute eventually led to Somi leaving the project leaving dozens of local subcontractors and suppliers unpaid. The local newspaper gave detailed coverage of

960-420: Was defined as equal to 10 units of power in the practical system of units. The "international units" were dominant from 1909 until 1948. After the 9th General Conference on Weights and Measures in 1948, the international watt was redefined from practical units to absolute units (i.e., using only length, mass, and time). Concretely, this meant that 1 watt was defined as the quantity of energy transferred in

992-657: Was nationalised, and the station became the responsibility of the British Electricity Authority (1948-1955) then the Central Electricity Authority (1955-1957) and finally the Central Electricity Generating Board (1958-1990). Staythorpe A was first commissioned in March 1950. It had six 60 MW British Thomson-Houston turbo-alternators giving a gross capability of 360 MW and a net generating capability of 336 MW. The second set

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1024-613: Was upgraded for the new power station. The GMB and Unite trade unions demonstrated at the station when Alstom recruited non-UK contract labour to build the power station. Staythorpe is a CCGT power station that runs primarily on natural gas, but has the theoretical (not commissioned) option to switch to (distillate) light fuel oil . It was designed to generate enough electricity for two million homes with four KA26-1 modules each generating around 430 MWe, each with an Alstom 288 MWe GT26B gas turbine , triple-pressure heat recovery steam generator and steam turbine . Electricity

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