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Electric Mountain
The Dinorwig Power Station (; ), known locally as Electric Mountain, or Mynydd Gwefru, is a pumped-storage hydroelectric scheme, near Dinorwig, Llanberis in Snowdonia national park in Gwynedd, north Wales. The scheme can supply a maximum power of and has a storage capacity of around . Purpose The scheme was built at a time when responsibility for electricity generation in England and Wales was in the hands of the government's Central Electricity Generating Board (CEGB); with the purpose of providing peak capacity, very rapid response, energy storage and frequency control. Dinorwig's very rapid response capability significantly reduced the need to hold spinning reserve on part loaded thermal plant. When the plant was conceived the CEGB used low efficiency old coal and oil fired capacity to meet peaks in demand. More efficient 500MW thermal sets were introduced in the 1960s, initially for baseload operation only. Dinorwig could store cheap energy produced at night by low marginal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elidir Fawr
Elidir Fawr is a mountain in Snowdonia, north Wales, the northernmost peak in the Glyderau. Its name means 'Big Elidir', named after a legendary warrior king of the 6th century also known as Eliffer Gosgorddfawr (Elidir of the Great Army). To the north of the summit is a small lake, Marchlyn Mawr, which is the upper reservoir for Dinorwig power station, a pump-storage power station hidden inside the mountain. Water from this lake flows through huge tunnels into the lower reservoir Llyn Peris. From the north, Elidir Fawr is very prominent, and can appear to be higher than the higher mountains behind it. Slate quarries From Llanberis, the mountain is dominated by the former Dinorwic slate quarries and the waste they have left behind. Approach It is a reasonably short, but steep walk up to the summit, and this can be undertaken from the Deiniolen side or from Nant Peris The Llanberis Pass (; alternative English name, Pass of Llanberis) in Snowdonia carries the main road ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial College London
Imperial College London, also known as Imperial, is a Public university, public research university in London, England. Its history began with Prince Albert of Saxe-Coburg and Gotha, Prince Albert, husband of Queen Victoria, who envisioned a Albertopolis, cultural district in South Kensington that included museums, colleges, and the Royal Albert Hall. In 1907, these colleges – the Royal College of Science, the Royal School of Mines, and the City and Guilds of London Institute – merged to form the Imperial College of Science and Technology. In 1988, Imperial merged with St Mary's Hospital, London, St Mary's Hospital Medical School and then with Charing Cross and Westminster Medical School to form the Imperial College School of Medicine. The Imperial Business School was established in 2003 and officially opened by Elizabeth II, Queen Elizabeth II. Formerly a constituent college of the University of London, Imperial became an independent university in 2007. Imperial is o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Implenia
Implenia is a Swiss real estate and construction services company with activities in development and civil engineering in Switzerland and Germany. Implenia is also active in tunneling and related infrastructure construction in Austria, France, Sweden, Norway and Italy. The Group was formed at the beginning of 2006 from the merger of Basel-based Batigroup Holding AG with Geneva-based Zschokke Holding SA. The headquarters are located in Glattpark (Opfikon) in the canton of Zurich. Implenia is one of the 500 largest companies in Switzerland. History Origin Implenia was created out of a series of mergers between Swiss regional construction companies, but ultimately from the 2006 merger of Batigroup and Zschokke Holding.''"Spatenstich für die Implenia"''. ''Neue Zürcher'' Zeitung (in German). 3 March 2006. Retrieved 2023-01-10. In mid-1997 Preiswerk Holding AG merged with Schweizerische Strassenbau- und Tiefbau-Unternehmung AG (Stuag) / Stuag Holding AG and Schmalz AG Bauunt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred McAlpine
Alfred McAlpine plc was a British construction firm headquartered in Hooton, Cheshire. It was listed on the London Stock Exchange until it was acquired by Carillion in 2008. The origins of Alfred McAlpine are strongly associated with the businessman Alfred McAlpine (businessman), Alfred McAlpine, a son of 'Concrete' Sir Robert McAlpine, 1st Baronet, Bob McAlpine, and the north western operations of Sir Robert McAlpine. These operations became legally distinct in 1940; 18 year later, the company was Initial public offering, floated on the London Stock Exchange under the name ''Marchwiel Holdings''. By this point, Alfred James McAlpine, Jimmie McAlpine was the chairman of the company, a position he would hold until 1985. Prior to 1983, the company's operations were constrained by a non-compete agreement with Sir Robert McAlpine; while the geographical restriction was removed, some terms of agreement remained in effect between the two companies. Throughout the second half of the tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snowdonia National Park
Snowdonia, or Eryri (), is a mountainous region and National parks of the United Kingdom, national park in North Wales. It contains all 15 mountains in Wales Welsh 3000s, over 3000 feet high, including the country's highest, Snowdon (), which is tall. These peaks are all part of the Snowdon Massif, Snowdon, Glyderau, and Carneddau ranges in the north of the region. The shorter Moelwynion and Moel Hebog ranges lie immediately to the south. The national park has an area of (the fourth-largest in the UK), and covers most of central and southern Gwynedd and the western part of Conwy County Borough. This is much larger than the area traditionally considered Snowdonia, and in addition to the five ranges above includes the Rhinogydd, Cadair Idris, and Aran Fawddwy, Aran ranges and the Dyfi hills, Dyfi Hills. It also includes most of the coast between Porthmadog and Aberdyfi. The park was the first of the three national parks of Wales to be designated, in October 1951, and the third i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Wales Hydro Electric Power Act 1973
The North Wales Hydro Electric Power Act 1973 (c. xxxvi) is an act of the Parliament of the United Kingdom which gave powers to the Central Electricity Generating Board (CEGB) to build the hydro electric station at Dinorwig in North Wales and associated purposes. Background The Central Electricity Generating Board had a statutory duty to develop and maintain an electricity supply in England and Wales. In order to meet increasing demand for electricity there was a need to construct and operate new works for generating electricity. This Act gave powers to the CEGB to build the hydro electric station at Dinorwig in North Wales. North Wales Hydro Electric Power Act 1973 The North Wales Hydro Electric Power Act 1973 received Royal Assent on 19 December 1973. Its long title is ‘An Act to confer powers upon the Central Electricity Generating Board for the construction and erection of works and a generating station in the county of Caernarvon and for the acquisition of lands and eas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utility Frequency
The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the nominal frequency of the oscillations of alternating current (AC) in a wide area synchronous grid transmitted from a power station to the end-user. In large parts of the world this is 50 Hz, although in the Americas and parts of Asia it is typically 60 Hz. Current usage by country or region is given in the list of mains electricity by country. During the development of commercial electric power systems in the late-19th and early-20th centuries, many different frequencies (and voltages) had been used. Large investment in equipment at one frequency made standardization a slow process. However, as of the turn of the 21st century, places that now use the 50 Hz frequency tend to use 220–240 V, and those that now use 60 Hz tend to use 100–127 V. Both frequencies coexist today (Japan uses both) with no great technical reason to prefer one ove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arbitrage
Arbitrage (, ) is the practice of taking advantage of a difference in prices in two or more marketsstriking a combination of matching deals to capitalize on the difference, the profit being the difference between the market prices at which the unit is traded. Arbitrage has the effect of causing prices of the same or very similar assets in different markets to converge. When used by academics in economics, an arbitrage is a transaction that involves no negative cash flow at any probabilistic or temporal state and a positive cash flow in at least one state; in simple terms, it is the possibility of a risk-free profit after transaction costs. For example, an arbitrage opportunity is present when there is the possibility to instantaneously buy something for a low price and sell it for a higher price. In principle and in academic use, an arbitrage is risk-free; in common use, as in statistical arbitrage, it may refer to ''expected'' profit, though losses may occur, and in practic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pumped Hydroelectric Energy Storage
Pumped-storage hydroelectricity (PSH), or pumped hydroelectric energy storage (PHES), is a type of hydroelectric energy storage used by electric power systems for load balancing. A PSH system stores energy in the form of gravitational potential energy of water, pumped from a lower elevation reservoir to a higher elevation. Low-cost surplus off-peak electric power is typically used to run the pumps. During periods of high electrical demand, the stored water is released through turbines to produce electric power. Pumped-storage hydroelectricity allows energy from intermittent sources (such as solar, wind, and other renewables) or excess electricity from continuous base-load sources (such as coal or nuclear) to be saved for periods of higher demand. The reservoirs used with pumped storage can be quite small, when contrasted with the lakes of conventional hydroelectric plants of similar power capacity, and generating periods are often less than half a day. The round-trip efficie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Kettle
A kettle, sometimes called a tea kettle or teakettle, is a device specialized for boiling water, commonly with a ''lid'', ''spout'', and ''handle''. There are two main types: the ''stovetop kettle'', which uses heat from a hob, and the ''electric kettle'', which is a small kitchen appliance with an internal heating element. Etymology The word ''kettle'' originates from Old Norse ''ketill'', "cauldron". The Old English spelling was ''cetel'' with initial ''che-'' ʃlike 'cherry', Middle English (and dialectal) was ''chetel'', both come (together with German ''Kessel'' "cauldron") ultimately from Germanic ''*katilaz'', that was borrowed from Latin ''catillus'', diminutive form of ''catinus'' "deep vessel for serving or cooking food", which in various contexts is translated as "bowl", "deep dish", or "funnel". Stovetop kettles A modern stovetop kettle is a metal vessel with a flat bottom used to heat water on a stovetop or hob. They usually have a handle on top, a spout, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TV Pickup
TV pickup is a phenomenon that occurs in the United Kingdom involving sudden surges in demand on the national electrical grid, occurring when a large number of people simultaneously watch the same television programme. TV pickup occurs when viewers take advantage of commercial breaks in programming to operate electrical appliances at the same time, causing large synchronised surges in national electricity consumption. Such sudden huge surges in demand tied to the TV schedule are unique to the United Kingdom. Electricity networks devote considerable resources to predicting and providing supply for these events, which typically impose an extra demand of around 200–400 megawatts (MW) on the British National Grid. Short-term supply is often obtained from pumped storage reservoirs, which can be quickly brought online, and are backed up by the slower fossil fuel and nuclear power stations. The largest ever pickup occurred on 4 July 1990, when a 2800 megawatt demand was imposed by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
