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Topic: Hydroelectric

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	Hydroelectricity
		Hydroelectricity is obtained from the ENERGY contained in falling water; it is a renewable, comparatively nonpolluting energy source and Canada's largest source of ELECTRIC-POWER GENERATION.
		Early use of hydroelectric generation was limited by the capacity of the generating station, which was governed by the waterpower resource (streamflow and net height of fall), or by the electric-lighting load near the station.
		Hydroelectric generation was not developed in Saskatchewan until the early 1960s, when the S Saskatchewan R Development provided control and regulation of the province's major river system.
	www.thecanadianencyclopedia.com /index.cfm?PgNm=TCE&Params=A1ARTA0003932 (1320 words)

	Hydroelectric generator - Patent 7042113
		A hydroelectric generator having a fixed axle, at least one transmission axle parallel to the fixed axle, and a transmission system configured to rotate the transmission axle about the fixed axle and to apply a force to at least one driven member of a device for generating electricity.
		The hydroelectric generator of claim 7, wherein the third mechanical transmission system is configured to drive a first driven member of a device for generating electricity in a first direction and a second driven member of a device for generating electricity in a second direction.
		The hydroelectric generator of claim 8, further comprising a device for generating electricity, wherein a first driven member of the device for generating electricity is coupled to a coil of wire and a second driven member of the device for generating electricity is coupled to a magnet.
	www.freepatentsonline.com /7042113.html (3246 words)

	Hydroelectric Power
		Hydroelectric power is the largest source of renewable energy in the United States and in the world, providing roughly one-fifth of the world's electricity.
		Hydroelectric power is produced by converting the flow of water into electricity by using a turbine.
		Hydroelectric power is responsible for almost all of the electricity used in Norway.
	www.geocities.com /fifarekworld/hydroelectric.html (317 words)

	Hydroelectric Encyclopedia Article @ LocalColorArt.com (Local Color Art) (Site not responding. Last check: 2007-11-05)
		Hydroelectric plants are immune to price increases for fossil fuels such as oil, natural gas or coal, and do not require imported fuel.
		Hydroelectric plants tend to have longer lives than fuel-fired generation, with some plants now in service having been built 50 to 100 years ago.
		Some hydroelectric projects also utilize canals, typically to divert a river at a shallower gradient to increase the head of the scheme.
	encyclopedia.localcolorart.com /encyclopedia/Hydroelectric (1760 words)

	Natural Hazards Vulnerability of the Dominica Hydroelectric Expansion Project
		Hydroelectric facilities are vulnerable to several types of natural hazards.
		The area affected by the Dominica Hydroelectric Expansion Project is mapped on the landslide hazard map produced in 1987 as having areas with moderate and high landslide hazard (DeGraff, 1987).
		For example, the vulnerability of sediment damage to turbine blades from landslide activity or ashfall during a volcanic eruption could be limited to increasing the frequency of maintenance of grit tanks on pipeline intakes to ensure their maximum effectiveness.
	www.oas.org /CDMP/document/domhydro/dominica.htm (7340 words)

	PowerPedia:Hydroelectric - PESWiki
		Hydroelectric plants are immune to price increases for fossil fuels such as oil, natural gas or coal, and do not require imported fuel.
		Hydroelectric plants tend to have longer lives than fuel-fired generation, with some plants now in service having been built 50 to 100 years ago.
		Some hydroelectric projects also utilize canals, typically to divert a river at a shallower gradient to increase the head of the scheme.
	www.peswiki.com /index.php/PowerPedia:Hydroelectric (1967 words)

	Renewable Energy: Hydroelectric power
		Hydroelectric power plants use the movement of water to turn turbines which generate electricity.
		Hydroelectricity has been used since the late 1800s, and its technology was implemented on a grand scale during the Great Depression, when Franklin D. Roosevelt commissioned the Grand Coulee Dam on the Columbia River.
		Operating costs of hydroelectric dams are relatively low, and this dam is being designed to deliver 18 thousand megawatts of power, over 18% of the nation's generating capacity at the time of the proposal.
	www.suite101.com /article.cfm/engineering_environment/60444 (537 words)

	The Energy Planet :: Hydroelectric Power :: English
		Modern hydroelectric power plants are much more complex than the original ancient mills, but the same concept that once ground corn is now used to supply electricity to Las Vegas.
		The second main downside of hydroelectric power plants is the fact that the dam, which is essential to the plant, destroys many habitats.
		Hydroelectric power has many benefits that outweigh the downsides, but improvements are still needed.
	library.thinkquest.org /C004471/tep/en/traditional_energy/hydroelectric_power.html (728 words)

	25x'25 - Why Renewables: Hydroelectric and Tidal Power
		Hydroelectric power is considered renewable, though some people have raised concerns over large hydroelectric dams due to their impacts on ecosystems, water quality, and natural river flow.
		Reliable and Predictable: Hydroelectric and tidal power facilities produce power on a predictable, and in the case of hydroelectric dams that store their energy source until it is needed, controllable schedule.
		Hydroelectric and tidal power can provide secure, reliable electricity from either centralized or distributed generation facilities in concert with the irrigation needs of the nation's working lands.
	www.25x25.org /index.php?option=com_content&task=view&id=19&Itemid=48 (822 words)

	About Hydroelectric Energy
		Hydroelectric energy is a renewable energy source dependent upon the hydrologic cycle of water, which involves evaporation, precipitation and the flow of water due to gravity.
		Traditionally, the cost of generating hydroelectric energy in Canada has been one of the lowest in the world. This allows for low retail electricity prices, to the benefit of residential users and electricity-intensive industries in Canada, such as the aluminum industry. Media reports indicate that the development of new sites would also be fairly low cost.
		Hydroelectric stations have a long life and many existing stations have been in operation for more than half a century and are still operating efficiently.
	www.canren.gc.ca /tech_appl/index.asp?CaId=4&PgId=26 (1030 words)

	How Hydroelectric Energy Works
		Hydroelectric power is the largest source of renewable electricity in the world and in the United States.
		In South America, 80 percent of the hydroelectric potential is located in rain forests.
		In northern India and Nepal, in the Himalayas, huge hydroelectric projects are planned that would create large reservoirs in a geographically unstable region.
	www.ucsusa.org /clean_energy/renewable_energy_basics/how-hydroelectric-energy-works.html (2113 words)

	THE HYDROELECTRIC POWER OPTION IN BRAZIL ENVIRONMENTAL, TECHNOLOGICAL AND ECONOMIC ASPECTS
		Aspects concerning the environment, as well as technological and economic considerations in regard to the use of hydroelectric power in Brazil are commented, stressing the importance of the transmission system for the integration and the optimization of hydroelectric generation.
		Hydroelectric power is an important and widely used primary source for the generation of electric power.
		The cost of the generated hydroelectric power is low and does not run the risk of rising (a risk faced in the case of thermal plants if the cost of fuel increases); in fact, it tends to drop in time, as the investment costs are partially or totally amortized for most plants.
	www.worldenergy.org /wec-geis/publications/default/tech_papers/17th_congress/1_2_06.asp (4838 words)

	Hydroelectric Power in South
		The coverage of hydroelectric power in the references is found as chapters in books -- and sections in articles -- on energy, energy policy, and water resources; and also as the specific focus of various articles.
		One of the major hindrances to the development of hydroelectric power in South America is the significant financial requisites (Brown 1978, Sears and Bragg 1987, Maguire and Brown 1986, Nazli 1982, Tendler 1968, Cavers and Nelson 1959, Stamos 1983, The Economist 1991, Da Rosa 1983).
		Reference to small-scale hydroelectric power is generally afforded in reaction to environmental effects and cost of large-scale projects (Brown 1978, Southgate and Macke 1989, Dunkerley, Ramsay, Gordon, and Cecelski 1981, Sears and Bragg 1987, Maguire and Brown, Holman, Fletcher, and Singer 1991).
	lilt.ilstu.edu /psanders/litsearch/hydroelectric.htm (2827 words)

	Hydroelectric Power
		Consumption of hydroelectricity and other renewables combined is expected to be between 37 and 47 quadrillion BTU in 2010.
		The Hydroelectric plant of Kremasta in Greece is 437 Mwatts.
		In Greece, hydroelectric power stations produced 3,693 gigawatts/hour of electricity in 2000, compared with a total of 4,145 gigawatts/hour from RESs as a whole (including biomass, wind energy, solar power stations, photovoltaic solar arrays, geothermal energy, etc).
	www.argotrade.com /hydroelectric (2211 words)

	Dynamic Energy Transformations: Hydroelectric Power Plants
		A hydroelectric power plant harnesses the energy found in moving or still water and converts it into electricity.
		This energy powers the generators, which are very important parts of the hydroelectric power plant; they convert the energy of water into electricity.
		Hydroelectric power plants use the resources that are readily available to us and do not create pollution.
	www.angelfire.com /magic/sciencewiz (1022 words)

	hydroelectricity, hydroelectric power, hydro
		The fame of the hydroelectric generating stations at Niagara Falls, Grand Coulee and Boulder Dam have helped perpetuate the myth that hydroelectric energy is always produced by falling water.
		Hydroelectric generators direct the flow of water through massive turbine devices which are much more efficient at extracting the kinetic energy from the moving water and turning it into electricity through the rotation of electrical generators.
		Hydroelectric energy is the most common source of electricity in the Canadian provinces of Newfoundland, Quebec and British Columbia, as well as in many western states.
	www.energyvortex.com /energydictionary/hydroelectricity__hydroelectric_power__hydro.html (331 words)

	Hydroelectric Power Generation, Osa Water Works, Costa Rica
		Large-scale hydroelectric power generation facilities have, since the early part of the twentieth century, been technology staples of industrialized society, providing power grids across all the continents with the energy to move industry and provide centers of population with domestic and commercial electricity.
		Hydroelectric power generation is normally favorable economically over solar power generation as well, presuming the resources are available for a hydro installation.
		Finally, local hydroelectric power generation reduces societal electrical demands, however slightly, thereby reducing, however infinitesimally, our dependence upon nuclear power plants and coal- and oil-burning power plants, all of which are at the forefront of global environmental concerns.
	www.osawaterworks.com /hydroelectric.htm (1083 words)

	TVA: Hydroelectric Power
		TVA maintains 29 conventional hydroelectric dams throughout the Tennessee River system and one pumped-storage facility for the production of electricity.
		Water is needed to run a hydroelectric generating unit.
		It’s held in a reservoir or lake behind the dam, and the force of the water being released from the reservoir through the dam spins the blades of a turbine.
	www.tva.gov /power/hydro.htm (248 words)

	Hydrolelectic water use in the United States in 1990 (Site not responding. Last check: 2007-11-05)
		Water used for hydroelectric power generation is classified as an instream use and refers to the water used in the generation of electricity at plants where the turbine generators are driven by falling water.
		Although the quantity of water evaporated in the actual generation of hydroelectric power (consumptive use) is very small, considerable depletion of the available water supply for hydroelectric power generation occurs as an indirect result of evaporation from reservoirs and repeated reuse of water within a pumped-storage power facility.
		Water used for hydroelectric power generation during 1990 was an estimated 3,290,000 Mgal/d (by water-resources region: tables 27, and by State: table 28), or 8 percent more than during 1985.
	water.usgs.gov /watuse/wuhy.html (483 words)

	Our Hydroelectric System
		The hydroelectric system is built along 16 river basins stretching nearly 500 miles from Redding in the north to Bakersfield in the south.
		Simply put, hydroelectricity is generated by the force of falling water.
		Pacific Gas and Electric Company's hydroelectric system is regulated by the Federal Energy Regulatory Commission (FERC), and by the California Public Utilities Commission (CPUC).
	www.pge.com /education_training/about_energy/hydroelectric_system (255 words)

	Sustainable Energy - Fact Sheet 9
		So, hydroelectric power stations are placed where they can use the greatest fall of a large quantity of water, or near the base of a dam.
		A hydroelectric generating unit is simpler in operation than a coal-fired power station because it does not need a boiler, or to burn fuel.
		Some people are opposed to any more large hydroelectric schemes being developed in Australia because of the high cost, the loss of valley land which could be farmed, the loss of natural scenery and the effect on the number and spread of native species (biodiversity).
	www.sustainableenergy.qld.edu.au /fact/factsheet_9.html (1409 words)

	Hydroelectric Energy!
		Hydroelectric energy is one of many energy sources used in the world.
		In this report there is going to be information about how hydroelectric energy works, its pros and cons, where dams are built, and more about making electricity form water.
		Hydroelectric dams can harm many species that live on the area, the land around the dam can be destroyed, and the furious turbines will kill the fish.
	www.webmutations.com /energy/reports/present/rephydro.html (396 words)

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