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  1. › wiki › Tidal_powerTidal power - Wikipedia

    Ocean Renewable Power Corporation was the first company to deliver tidal power to the US grid in September, 2012 when its pilot TidGen system was successfully deployed in Cobscook Bay, near Eastport. In New York City, 30 tidal turbines will be installed by Verdant Power in the East River by 2015 with a capacity of 1.05 MW.

    • Principle
    • Us and Canadian Studies in The Twentieth Century
    • Us Studies in The Twenty-First Century
    • Rance Tidal Power Plant in France
    • Tidal Power Development in The UK
    • Current and Future Tidal Power Schemes
    • Issues and Challenges
    • Structural Health Monitoring
    • See Also
    • External Links

    Tidal power is taken from the Earth's oceanic tides. Tidal forces are pe­ri­odic vari­a­tions in grav­i­ta­tional at­trac­tion ex­erted by ce­les­tial bod­ies. These forces cre­ate cor­re­spond­ing mo­tions or cur­rents in the world's oceans. Due to the strong at­trac­tion to the oceans, a bulge in the water level is cre­ated, caus­ing a tem­po­rary in­crease in sea level. As the Earth ro­tates, this bulge of ocean water meets the shal­low water ad­ja­cent to the shore­line and cre­ates a tide. This oc­cur­rence takes place in an un­fail­ing man­ner, due to the con­sis­tent pat­tern of the moon's orbit around the earth. The mag­ni­tude and char­ac­ter of this mo­tion re­flects the chang­ing po­si­tions of the Moon and Sun rel­a­tive to the Earth, the ef­fects of Earth's ro­ta­tion, and local ge­og­ra­phy of the seafloor and coast­lines. Tidal power is the only tech­nol­ogy that draws on en­ergy in­her­ent in the or­bital char­ac­ter­is­tics of the Earth–Moon sys­tem, and to a lesser...

    The first study of large scale tidal power plants was by the US Fed­eral Power Com­mis­sion in 1924 which if built would have been lo­cated in the north­ern bor­der area of the US state of Maine and the south­east­ern bor­der area of the Cana­dian province of New Brunswick, with var­i­ous dams, pow­er­houses, and ship locks en­clos­ing the Bay of Fundy and Pas­samaquoddy Bay(note: see map in ref­er­ence). Noth­ing came of the study and it is un­known whether Canada had been ap­proached about the study by the US Fed­eral Power Commission. In 1956, util­ity Nova Sco­tia Light and Power of Hal­i­fax com­mis­sioned a pair of stud­ies into the fea­si­bil­ity of com­mer­cial tidal power de­vel­op­ment on the Nova Sco­tia side of the Bay of Fundy. The two stud­ies, by Stone & Web­ster of Boston and by Mon­treal En­gi­neer­ing Com­pany of Mon­trealin­de­pen­dently con­cluded that mil­lions of horse­power could be har­nessed from Fundy but that de­vel­op­ment costs would be com­mer­cially pr...

    The Sno­homish PUD, a pub­lic util­ity dis­trict lo­cated pri­mar­ily in Sno­homish county, Wash­ing­ton State, began a tidal en­ergy pro­ject in 2007; in April 2009 the PUD se­lected OpenHydro, a com­pany based in Ire­land, to de­velop tur­bines and equip­ment for even­tual in­stal­la­tion. The pro­ject as ini­tially de­signed was to place gen­er­a­tion equip­ment in areas of high tidal flow and op­er­ate that equip­ment for four to five years. After the trial pe­riod the equip­ment would be re­moved. The pro­ject was ini­tially bud­geted at a total cost of $10 mil­lion, with half of that fund­ing pro­vided by the PUD out of util­ity re­serve funds, and half from grants, pri­mar­ily from the US fed­eral gov­ern­ment. The PUD paid for a por­tion of this pro­ject with re­serves and re­ceived a $900,000 grant in 2009 and a $3.5 mil­lion grant in 2010 in ad­di­tion to using re­serves to pay an es­ti­mated $4 mil­lion of costs. In 2010 the bud­get es­ti­mate was in­creased to $20 mil­li...

    In 1966, Élec­tricité de France opened the Rance Tidal Power Sta­tion, lo­cated on the es­tu­ary of the Rance River in Brit­tany. It was the world's first tidal power sta­tion. The plant was for 45 years the largest tidal power sta­tion in the world by in­stalled ca­pac­ity: Its 24 tur­bines reach peak out­put at 240 megawatts (MW) and av­er­age 57 MW, a ca­pac­ity fac­torof ap­prox­i­mately 24%.

    The world's first ma­rine en­ergy test fa­cil­ity was es­tab­lished in 2003 to start the de­vel­op­ment of the wave and tidal en­ergy in­dus­try in the UK. Based in Orkney, Scot­land, the Eu­ro­pean Ma­rine En­ergy Cen­tre (EMEC) has sup­ported the de­ploy­ment of more wave and tidal en­ergy de­vices than at any other sin­gle site in the world. EMEC pro­vides a va­ri­ety of test sites in real sea con­di­tions. Its grid con­nected tidal test site is lo­cated at the Fall of War­ness, off the is­land of Eday, in a nar­row chan­nel which con­cen­trates the tide as it flows be­tween the At­lantic Ocean and North Sea. This area has a very strong tidal cur­rent, which can travel up to 4 m/s (8.9 mph; 7.8 kn; 14 km/h) in spring tides. Tidal en­ergy de­vel­op­ers that have tested at the site in­clude: Al­stom (for­merly Tidal Gen­er­a­tion Ltd); AN­DRITZ HYDRO Ham­mer­fest; At­lantis Re­sources Cor­po­ra­tion; Nautric­ity; Open­Hy­dro; Scotre­new­ables Tidal Power; Voith. The re­source could...

    The Rance tidal power plant built over a period of 6 years from 1960 to 1966 at La Rance, France.It has 240 MW installed capacity.
    254 MW Sihwa Lake Tidal Power Plantin South Korea is the largest tidal power installation in the world. Construction was completed in 2011.
    The first tidal power site in North America is the Annapolis Royal Generating Station, Annapolis Royal, Nova Scotia, which opened in 1984 on an inlet of the Bay of Fundy.It has 20 MW installed capa...
    The Jiangxia Tidal Power Station, south of Hangzhou in China has been operational since 1985, with current installed capacity of 3.2 MW. More tidal power is planned near the mouth of the Yalu River.

    Environmental concerns

    Tidal power can have ef­fects on ma­rine life. The tur­bines can ac­ci­den­tally kill swim­ming sea life with the ro­tat­ing blades, al­though pro­jects such as the one in Strang­ford fea­ture a safety mech­a­nism that turns off the tur­bine when ma­rine an­i­mals ap­proach. How­ever, this fea­ture causes a major loss in en­ergy be­cause of the amount of ma­rine life that passes through the turbines. Some fish may no longer uti­lize the area if threat­ened with a con­stant ro­tat­ing or noise...


    Salt­wa­ter causes cor­ro­sion in metal parts. It can be dif­fi­cult to main­tain tidal stream gen­er­a­tors due to their size and depth in the water. The use of cor­ro­sion-re­sis­tant ma­te­ri­als such as stain­less steels, high-nickel al­loys, cop­per-nickel al­loys, nickel-cop­per al­loys and ti­ta­nium can greatly re­duce, or elim­i­nate cor­ro­sion dam­age. Me­chan­i­cal flu­ids, such as lu­bri­cants, can leak out, which may be harm­ful to the ma­rine life nearby. Proper main­te­nance c...


    The bi­o­log­i­cal events that hap­pen when plac­ing any struc­ture in an area of high tidal cur­rents and high bi­o­log­i­cal pro­duc­tiv­ity in the ocean will en­sure that the struc­ture be­comes an ideal sub­strate for the growth of ma­rine or­gan­isms. In the ref­er­ences of the Tidal Cur­rent Pro­ject at Race Rocks in British Co­lum­bia, this is doc­u­mented.Also see this page andSev­eral struc­tural ma­te­ri­als and coat­ings were tested by the Lester Pear­son Col­lege diversto as­sist...

    The high load fac­tors re­sult­ing from the fact that water is 800 times denser than air, and the pre­dictable and re­li­able na­ture of tides com­pared with the wind, make tidal en­ergy par­tic­u­larly at­trac­tive for elec­tric power gen­er­a­tion. Con­di­tion mon­i­tor­ing is the key for ex­ploit­ing it cost-efficiently.

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    Larry didn't stay long, but will leave a big bill in some parts of Newfoundland As the mounds of broken tree limbs and branches pile higher at drop-off sites around the city, so,

  3. May 01, 2021 · NYC, unless you leave from City Island, could be a hassle to leave from because of the tides and currents going through Hell Gate. There are not a lot of firms doing sailboat charters. I found one out of City Island, but a quick glance caused major sticker shock. $750 for a quarter-day?

  4. › download › HRF-Library-available-5-5Hudson River

    A summary of open space needs on a New York City communities, and a look at possible funding without an increase in spending. New York City Open Space Task Force Waterfront development , Open Space , Visual resource , Urban planning 23 OENV.1.12 New York City's Water Supply: acid deposition, inorganic pollution and the Catskill reservoirs

  5. Nautical Chart is the all essential cartographic reference for boaters worldwide. If you’re looking for an accurate and thorough map of lakes and marine areas, Nautical Chart is the resource you’ll want by your side. Use the map to study port plans and safety depth contours, identify tides & currents, and locate

  6. Mar 04, 2014 · 2000. Simple-cycle gas turbine. 750. Imported power. 6572. Total new power plants (20122030) 55,130. Source: Power Development Plan (PDP2010) Rev3, June 2012, EGAT. Table 2. Renewable power plant targets, as per Alternative Energy Development Plan (AEDP 20122021) Renewable Power Plant Target. Generation capacity (MW) Solar. 3000. Wind. 1800 ...

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