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Topic: Tidal power

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	Directory:Tidal Power - PESWiki
		Tidal Power for San Francisco (http://thefraserdomain.typepad.com/energy/ocean_power/index.html) - The tides at the Golden Gate offer one of the best locations on the western coast of North America, capable of generating as much as 38 megawatts of power -- enough alternative energy to provide power to nearly 40,000 San Francisco homes.
		Tidal and River Turbine by University of Southampton - The University of Southampton's minimalist design significantly reduces the number of moving parts, and is fully assembled prior to installation, reducing costs.
		Consortium Examines Tidal Power Generation for UK (http://www.renewableenergyaccess.com/rea/news/story?id=38117) - The first Tidal Delay pilot plant in the UK, to be constructed in 2007/2008, will initiate a series of plants that will contribute to the UK's commitment to renewable energy and further enhance the UK's strength in marine energy technology leadership.
	peswiki.com /index.php/Directory:Tidal_Power (3123 words)

	Hydro & Tidal (Site not responding. Last check: 2007-11-05)
		Tidal power is using the tides to extract energy to convert into electricity.
		Tidal power is catching this water when it is at high tide and storing it in reservoir type structures until the time of low tide.
		One offshoot of tidal power that is currently being researched is the possibility of using the energy extracted from waves to produce hydrogen for fuel or fuel cells.
	www.personal.psu.edu /users/c/x/cxo163/html/hydro___tidal.html (1746 words)

	Rezachek & Associates' Energy & Environmental Resources - Renewable Energy - Tidal Energy
		Power from the Tides The energy contained in the tidal power of our seas is a major resource of energy.
		Tidal Energy There are a few places in the world where there is a large enough difference between the high and low tides of the ocean to generate electricity.
		Tidal Energy Tidal electricity generation involves construction of a barrage across an estuary to block the incoming and outgoing tide.
	www.sustainablehawaii.com /tidalpg1.htm (832 words)

	WEC Survey of Energy Resources 2001 - Tidal Energy
		However, development of tidal energy resources is dependent on the further expansion of hydroelectric resources and the construction of a transmission system that could connect tidal power plants with a suitable distribution network.
		The development of tidal energy is disadvantaged, however, by the small range of neap tides, which is too low for power generation, and the impracticality of absorbing large amounts of intermittent power in a remote region without installing costly transmission links.
		The tidal ranges of the Gulf of Kutch and the Gulf of Khambat are 5 m and 7 m respectively, the theoretical capacities 900 MW and 7 000 MW respectively and the estimated annual output approximately 1.6 TWh and 15.0 TWh respectively.
	www.worldenergy.org /wec-geis/publications/reports/ser/tide/tide.asp (4287 words)

	Tidal Power (Site not responding. Last check: 2007-11-05)
		As with hydropower, tidal power plants are relatively expensive to build (because of dam construction cost) but relatively cheap to operate (the fuel being essentially free), giving overall fairly high costs per unit of power generated.
		However, with rising costs of power generation from fossil fuels and inclusion of environmental costs in the investment calculations, tidal power may well be more competitive in the future.
		La Rance: the first tidal power plant (average tidal range 8 metres) was completed at the mouth of the La Rance estuary on the Brittany coast of France in 1966.
	www.smec.com.au /development/quantum/power/tidal_power.htm (874 words)

	Tidal Power (Site not responding. Last check: 2007-11-05)
		Power was available for about two to three hours, usually twice a day, as apposed to today’s power typically lasting twelve hours and twenty- five minutes.
		A barrage re-times the tidal cycle and changes the water levels, thereby “moving” the wet/dry intertidal zone, obliging the plant and animal life to adapt or “move” to the new location.
		Barrages change the tidal regime downstream: Huge barrages have been proposed and one of the major concerns was the fact that coastal process modeling conjectured that the highest tides downstream of the barrage might be raised as much as 9 inches as far away as Boston, more than 800 miles.
	www.personal.psu.edu /users/s/j/sjb5062/Index.html (1286 words)

	Exmoor National Park - tidal power
		Tidal power has been used for centuries in the form of tidal mills, although not in the Exmoor area.
		The Bristol Channel, however, has the second highest tidal range in the world and is a prime site for the development of tidal power.
		The tidal currents of the Foreland are very strong and in spring 2003 an 80 tonne steel pile was pushed into the seabed off the Point.
	www.exmoor-nationalpark.gov.uk /tidal_power (750 words)

	Tidal Energy -
		Tides, the daily rise and fall of ocean levels relative to coastlines, are a result of the gravitational forces of the moon and sun as well as the revolution of the earth.
		Tidal electricity generation involves the construction of a barrage across a delta, estuaries, beaches, or other places that are affected by the tides [1].
		The basic difference between a hydraulic power plant on a river and a tidal power plant is this two-directional flow [2].
	www.oceansatlas.org /cds_static/en/tidal_energy__en_3061_all_1.html (372 words)

	Keith M Park - Tidal Power Generation (Site not responding. Last check: 2007-11-05)
		Powered by tidal interchanges twice daily, salt water continues to pour in and out, rushing through constrictions between islands and inlets with the energy of an immense river.
		Tides and tidal currents are generated by gravitational forces of the sun and moon on the ocean waters of the rotating earth.
		Potentially the largest disadvantage of tidal power is the effect a tidal station has on the plants and animals which live within the estuary.
	sonoyuu.com /PortTidalPower.htm (5114 words)

	Tidal Power (index of resources) (Site not responding. Last check: 2007-11-05)
		Tidal Power for San Francisco - The tides at the Golden Gate offer one of the best locations on the western coast of North America, capable of generating as much as 38 megawatts of power -- enough alternative energy to provide power to nearly 40,000 San Francisco homes.
		Consortium Examines Tidal Power Generation for UK - The first Tidal Delay pilot plant in the UK, to be constructed in 2007/2008, will initiate a series of plants that will contribute to the UK's commitment to renewable energy and further enhance the UK's strength in marine energy technology leadership.
		Tidal Power Delayed for Whale - Annapolis Tidal Generating Station temporarily shuts down as young humpback whale explores the River off of the Bay of Fundy in Nova Scotia.
	www.freeenergynews.com /Directory/Tidal/index.html (1383 words)

	First power station to harness Moon opens - 22 September 2003 - New Scientist
		Although still largely a prototype, the generator is the first in the world to harness the power of the open sea and be connected to an electricity grid.
		Tidal energy has one key advantage over other renewable forms of power - it has the potential to provide a near continuous source of power 24 hours a day.
		This means that tidal power has the potential to make a significant contribution to the baseload - the minimum amount of electricity needed by a country and usually provided by coal and nuclear power plants.
	www.newscientist.com /article.ns?id=dn4188 (620 words)

	Water Power Presents: Tidal Power (Site not responding. Last check: 2007-11-05)
		Tidal power stations can stretch over a delta, estuaries, beaches or other places that are affected by the tides.
		Tidal power stations are already being used in Canada, France, Russia and China.
		Tidal power stations are very expensive to build and they often create electricity when it isn't needed as much.
	waterpower.hypermart.net /tidal.html (323 words)

	Tidal Power (Site not responding. Last check: 2007-11-05)
		Tidal power harnesses the twice daily variation in the sea level caused mostly by the gravitational effect of the moon and also the sun on the world's oceans.
		Tidal power has become economically feasible as a result of the continuous rise in price of fossil fuels, and a number of nations already possess working tidally driven electric generating facilities.
		A tidal power plant is similar in principle to hydropower generation facilities in rivers.
	www.edu.pe.ca /kish/Grassroots/Elect/Tidal4.htm (347 words)

	[No title]
		In Britain, there are about 40 key locations around the coastlines where, in theory, there's enough energy in tidal streams to generate up to a quarter of the nation's electricity.
		A prototype that generates power using the circular motion of propeller-like turbines was originally due for installation off the coast of south-west England in 2000.
		The tidal power station should be installed between the seabed and the Sound of Yell.
	membres.lycos.fr /jcviel/contents1/Tidal_power_station.htm (797 words)

	Tidal power - Wikipedia, the free encyclopedia
		Tidal Power is the power of electricity generation achieved by capturing the energy contained in moving water mass due to tides.
		However, Tidal energy is a limited source of energy because the tides only come and go every once in a while and the energy in the water is limited.
		A tidal power scheme is a long-term source of electricity.
	en.wikipedia.org /wiki/Tidal_power (2227 words)

	Tidal Energy Technology (Site not responding. Last check: 2007-11-05)
		The main difference between tidal power stations and hydroelectric stations is that the water flows in two directions in the tidal power station.
		The estimated building cost of a tidal power station that produces 1,085 megawatts of power is $1.2 billion.
		Tidal power has a positive effect on the environment in the long run by helping to reduce the demand for fossil fuels and nuclear energy.
	www.greenfocused.com /green-energy/tidal-energy.php (384 words)

	Marine Energy - Tidal Power
		Although the marine tidal turbine technologies tend to follow the same lines as wind turbines, due to the greater energy density (up to 4 times that of air) and hence power available in ocean currents, these devices can be much smaller than their Aeolian counterparts.
		Tidal power is more dependable than wind due to its predictable nature thus making it a better source of electrical energy for feeding the baseload of the national grid.
		In his recent paper 'Tidal Stream Power from the Gulf of Corryvrecken' Sandy Small of Glasgow's College of Nautical Studies suggests that Argyll's famous whirlpool between the islands of Jura and Scarba could be harnessed using tidal devices to produce up to 2 GW of renewable electricity.
	www.hie.co.uk /aie/tidal_power.html (1430 words)

	Tidal Power Energy - North Atlantic Energy Structures
		The patented method of tidal power generation is a relatively simple and benign method of renewable energy that will harness the energy from the earth's tidal currents.
		Due to the size of the power generating caissons and the amount of rock laid around the perimeter, small ice bergs are not a concern.
		An additional feature of these tidal power caissons is that they can be aligned to form the foundations for a bridge.
	www.tidalpowerenergy.ca (784 words)

	EIA Kids Page - Energy from the ocean
		Sluice gates on the barrage allow the tidal basin to fill on the incoming high tides and to empty through the turbine system on the outgoing tide, also known as the ebb tide.
		Potentially the largest disadvantage of tidal power is the effect a tidal station can have on plants and animals in the estuaries.
		Tidal fences have less impact on the environment than tidal barrages although they can disrupt the movement of large marine animals.
	www.eia.doe.gov /kids/energyfacts/sources/renewable/ocean.html (803 words)

	Fujita Research Report - Wave and tidal power
		The modular nature of the Blue Energy Power System allows for power to be generated in the fourth year of the project, with the installation of the first module in the chain, which gradually increases to full capacity by project completion in year six.
		Tidal turbines are the chief competition to the tidal fence.
		Tidal turbines function well where coastal currents run at 2-2.5 m/s (slower currents tend to be uneconomic while larger ones put a lot of stress on the equipment).
	www.fujitaresearch.com /reports/tidalpower.html (2333 words)

	Guardian Unlimited \| Special reports \| Tides to power turbine island
		A revolutionary tidal power station in the Irish Sea will generate a seventh of Wales's electricity under plans put forward by an American corporation, backed by Welsh politicians and part-funded by the United Nations.
		Traditional tidal power schemes have involved putting a barrage across an estuary, using turbines to generate power as water ebbs and flows.
		Tidal power is as predictable as the movement of the moon: 'I can tell you what energy we can produce on a certain day at a certain time up to 2080,' said Ullman.
	www.guardian.co.uk /renewable/Story/0,2763,372398,00.html (741 words)

	Renewable Energy: Tidal Power
		Tidal power is a particular kind of hydroelectric power that harnesses the energy contained in ocean tides.
		Tidal power plants have proven to be economically feasible, albeit at the threshold of economics viability, generating electricity at current rates of about US$0.05/kWh to US$0.10/kWh.
		Unlike solar and wind farms, tidal power plants are technically and economically feasible now, and in-depth studies on potential environmental problems have helped identify areas of weakness which must be considered.
	www.suite101.com /article.cfm/engineering_environment/60945 (439 words)

	No. 1654: Tidal Power, 1921
		Tidal power systems are potentially big and expen-sive, and they pose poorly understood threats to ocean ecosystems.
		Power use in 1921 was only a thirtieth of today's consumption.
		Yet tidal power was going to waste then, as it goes to waste today.
	www.uh.edu /engines/epi1654.htm (544 words)

	Tidal Power
		Tidal power generates electricity in similar fashion to hydroelectric power.
		A dam-like structure is constructed across an estuary to trap a high tide of water and then let it pass through turbines to generate electricity.
		The UK has the potential to widely use tidal power with the Severn and Mersey estuaries being possible sites.
	www.ace.mmu.ac.uk /eae/Sustainability/Older/Tidal_Power.html (86 words)

	Tidal Power/Hydroelectric News and Links
		Tidal power, wave power and hydroelectric are three forms of energy generation based on water.
		Tidal power comes from sea water moving through turbines as it flows in and out along tidal currents.
		Wave power is a similar technology, in which the motion of waves is converted into electricity.
	www.altenews.com /tidal.htm (125 words)

	The Power Of the Moon - Forbes.com (Site not responding. Last check: 2007-11-05)
		The technology of Ullman's tidal power station is as old as the hills--or rather, the valleys.
		Tidal energy is plentiful and predictable far into the future, a boon for power generation.
		The optimal location for a tidal power station is at a place where there is a big difference in water level between high and low tides.
	www.forbes.com /global/2003/0721/042.html (1014 words)

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