Unfortunately, while enjoying the waters in Cabarete, Miller, 42, was swept up by a powerful marine current and carried more than two miles from the shore.
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Fairmont Mayakoba, in alliance with a nongovernmental organization called Oceanus A.C., arranges a snorkel tour for $249 per person to underwater nurseries near the Puerto Morales national park area, where guests gather acropora palmata (a type of Caribbean reef-building coral) detached by the force of the marine current.
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The area between the islands and mainland Anglesey is the site of the planned Skerries Tidal Stream Array, being developed by Marine Current Turbines and RWE npower.
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The Kevlar fiber/epoxy matrix composite materials can be used in marine current turbines (MCT) or wind turbines due to their high specific strength and light weight compared to other fibers.
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In March 2008, the construction of the world's first commercial tidal stream turbine, for Marine Current Turbines, was completed at the Belfast yard. The installation of the 1.2MW SeaGen Tidal System was begun in Strangford Lough in April 2008.
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The possible use of marine currents as an energy resource began to draw attention in the mid-1970s after the first oil crisis. In 1974 several conceptual designs were presented at the MacArthur Workshop on Energy, and in 1976 the British General Electric Co. undertook a partially government-funded study which concluded that marine current power deserved more detailed research. Soon after, the ITD-Group in UK implemented a research program involving a year performance testing of a 3-m hydroDarrieus rotor deployed at Juba on the White Nile. The 1980s saw a number of small research projects to evaluate marine current power systems.
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Illustration of windpower inspired axial flow turbine used for marine power generation There are several types of open-flow devices that can be used in marine-current-power applications; many of them are modern descendants of the waterwheel or similar. However, the more technically sophisticated designs, derived from wind-power rotors, are the most likely to achieve enough cost-effectiveness and reliability to be practical in a massive marine-current-power future scenario. Even though there is no generally accepted term for these open-flow hydro-turbines, some sources refer to them as water-current turbines. There are two main types of water current turbines that might be considered: axial- flow horizontal-axis propellers (with both variable-pitch or fixed-pitch), and cross-flow Darrieus rotors.
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"Lester, Paul John, (born 20 Sept. 1949), non-executive chairman: Greenergy, since 2010; Essentra, since 2016." WHO'S WHO & WHO WAS WHO He was CEO of Graseby from 1990 to 1997 and CEO of VT Group from 2002 to 2010. He has held chairmanships at A&P; Group, Marine Current Turbines, Survitec Group, John Laing Infrastructure Fund, Forterra and Greenergy.
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Depiction of the Gulf Trough over Florida. The Gulf Trough, also known as the Suwanee Straits, is an ancient geologic feature of Florida present during the Paleogene period, a period of roughly that started after the end of the Mesozoic Era (65.5 Mya). A strong marine current, similar to the Gulf Stream, scoured the trough from southwest to northeast.
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Both rotor types may be combined with any of the three main methods for supporting water-current turbines: floating moored systems, sea-bed mounted systems, and intermediate systems. Sea-bed-mounted monopile structures constitute the first-generation marine current power systems. They have the advantage of using existing (and reliable) engineering know-how, but they are limited to relatively shallow waters (about 20 to 40 m depth).
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Portaferry industrial activities include agriculture, fishing, tourism. 'Suki Tea' announced as of 2014 that experimental tea growing will commence in the area, utilizing the relatively warm and dry climate, with frost protection from Strangford lough. The Lough is a centre for experimental marine current turbine technology development. In 2008 a twin rotor 1.2 MW SeaGen was installed and successfully demonstrated this technology until its decommissioning which began in 2017.
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Northern Ireland was home to the world's first commercially viable tidal stream generator. Trials were begun in Scotland then in England, before Marine Current Turbines installed the thousand-tonne SeaGen turbine at the mouth of Strangford Lough. The lough was chosen because it has one of the fastest tidal flows in the world. The installation went live and was connected to the grid in mid-December, 2008, injecting an extra 1.2 megawatts of electricity.
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The large and highly variable energy of waves gives them enormous destructive capability, making affordable and reliable wave machines problematic to develop. A small 2 MW commercial wave power plant, "Osprey", was built in Northern Scotland in 1995 about 300 metres (1000 ft) offshore. It was soon damaged by waves, then destroyed by a storm. Marine current power could provide populated areas close to the sea with a significant part of their energy needs.
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Trabucco of Rodi Garganico Trabocchi along the coast of Chieti, given by 'Abbey of San Giovanni in Venere to Fossacesia. The fishing technique, quite efficacious, is "on sight". It consists of intercepting, with wide nets, the flows of fish moving along the ravines of the coast. Trabucchi are located where the sea is deep enough (at least 6 meters), and are built on rocky peaks generally oriented southeast or north in order to exploit the favorable marine current.
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The turbine is scheduled to produce power for five years, though Marine Current Turbines were reported to have asked for an extension beyond their 2013 contract. By March 2010, the turbine had passed an operating time of over 1,000 hours - a first for any marine energy device. Impact to the environment was closely scrutinised. The device, built in Belfast's famous Harland and Wolff shipyard, is rigged with a sonar device which stops the motion of the rotor blades when it detects marine lifeform near it.
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The main countries where studies were carried out were the UK, Canada, and Japan. In 1992–1993 the Tidal Stream Energy Review identified specific sites in UK waters with suitable current speed to generate up to 58 TWh/year. It confirmed a total marine current power resource capable theoretically of meeting some 19% of the UK electricity demand. In 1994–1995 the EU-JOULE CENEX project identified over 100 European sites ranging from 2 to 200 km2of sea-bed area, many with power densities above 10 MW/km2.
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The SeaGen rotors can be raised above the surface for maintenance. SeaGen's predecessor, the 300 kW 'SeaFlow' turbine off the north coast of Devon Marine Current Turbines, the developer of SeaGen, demonstrated first prototype of tidal stream generator in 1994 with a 15 kilowatt system in Loch Linnhe, off the west coast of Scotland. In May 2003, the prototype for SeaGen, , was installed off the coast of Lynmouth, North Devon, England. Seaflow was a single rotor turbine which generated 300 kW but was not connected to the grid.
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On 8 June 2007 a new facility was opened for testing prototype marine current turbines and other turbine devices. This facility is operated and funded by the National Renewable Energy Centre. It uses the hydraulic head in the barge lock to release water through sluices at a controlled velocity to create a simulation of steady ocean current conditions downstream of the lock. The first turbine to be tested at this site was Evopod, a semi submerged floating tidal turbine developed by offshore consultancy Ocean Flow Energy Ltd based in North Shields.
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The Ecologist magazine reported that in 2004, EDF Energy spent virtually nothing on the construction of new renewable energy generation. On their website EDF reports that it is currently investing GBP 2 million in Marine Current Turbines, which use tidal power to generate electricity; however, these turbines are still at the research and prototype phase and EDF expect them to be operational "within the next five years" dependent upon "a successful pilot." EDF also has several ongoing renewable developments in windfarms. In 2007, EDF had an installed renewable energy generating capacity of 1.8MW, representing 0.08% of their total capacity of approximately 4,865MW.
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If this resource is to be successfully utilized, the technology required could form the basis of a major new industry to produce clean power for the 21st century. Contemporary applications of these technologies can be found here: List of tidal power stations. Since the effects of tides on ocean currents are so large, and their flow patterns are quite reliable, many ocean current energy extraction plants are placed in areas of high tidal flow rates Research on marine current power is conducted at, among others, Uppsala University in Sweden, where a test unit with a straight-bladed Darrieus type turbine has been constructed and placed in the Dal river in Sweden.
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The sea offers a very large supply of energy carried by ocean waves, tides, salinity differences, and ocean temperature differences which can be harnessed to generate electricity. Forms of 'green' marine energy include tidal power, marine current power, osmotic power, ocean thermal energy and wave power. Tidal power: the 1 km Rance Tidal Power Station in Brittany generates 0.5 GW. Tidal power uses generators to produce electricity from tidal flows, sometimes by using a dam to store and then release seawater. The Rance barrage, long, near St Malo in Brittany opened in 1967; it generates about 0.5 GW, but it has been followed by few similar schemes.
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