hydroelectric and pumped storage
DESCRIPTION
HYDROELECTRIC AND PUMPED STORAGE. PRESENT WORLD CAPACITY = 630 GW POWER = DELTA P x FLOW RATE POWER (W) =. H =METRES, Q = CUSECS. WORLD TOTAL = 630GW. Kaplan turbine, propeller, large Q, low H Can change blade angle. Need to run at constant speed. More than 100m Pelton wheel or - PowerPoint PPT PresentationTRANSCRIPT
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HYDROELECTRIC AND PUMPED STORAGE
• PRESENT WORLD CAPACITY = 630 GW
• POWER = DELTA P x FLOW RATE
• POWER (W) = QgH
H =METRES, Q = CUSECS
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WORLD TOTAL = 630GW
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More than 100mPelton wheel or Impulse turbine
Francis turbine vary output by QRadial inflow
Kaplan turbine, propeller, large Q, low HCan change blade angle
Need to run at constant speed
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TIDAL TURBINE
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FRANCIS TURBINE
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FRANCIS TURBINE
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POWER CONTROLLED BY FLOW RATE, Vcup = Vjet/2
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18 SETS OF 700 MW =12.6 GW, H=120M, FLOW = 9000 TONNES/S
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CRUACHAN PUMPER STORAGE SCHEME
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CRUACHAN RESERVOIR AND LOCH AWE
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DINORWIG PUMPED STORAGE IN WALES
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TIDAL POWER
GRAVITATIONAL AND CENTRIFUGAL FORCES CAUSED BY THE EARTH-MOONINTERACTIONTOTAL UK POTENTIAL = 17% OF CURRENT ELECTRICTY GENERATION
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12.5 HRS50 MINS LATEREACH DAY29.5 DAY CYCLE14 DAYS BETWEENSPRING & NEAPSUN PULL IS 177 BIGGER THAN MOONMID OCEANTR=0.5MNEAR COASTSTR AMPLIFIEDUP TO 15M
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MUTUAL ROTATION ABOUTCOMMON CENTRE GIVESLARGE OUTWARD G FORCEON SEA ON FAR SIDE & SMALLG FORCE ON NEAR SIDE.PULL OF MOON STRONG ON NEARSIDE, WEAKER THAN AVERAGEON FAR SIDESUM APPROX SAMEON BOTH SIDES
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2 miles of permanent mud at Weston – super - Mare
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R
AREA = A
MASS OF TRAPPED WATER = ARC OF G = R/2 ABOVE LOW WATER MARK
MAX PE IF ALL WATER FALLS R/2 = 2
..R
gAROver tidal period ‘t’ average PE =
T
gAR
2
2
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Reversible pumps/turbines better than sluice gates
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Turbines 6000MW between high & low basins, 2500 MW high & seaPumps 2500MW
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WAVE ENERGY
UP TO 2MW/mAverage 80kW/mTwice as much available in UK territorial watersAs current installed generating capacitySeasonal peak in the winterStorms a problem
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ANNUAL AVERAGE WAVE POWER IN KW/M
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SALTER DUCK WAVE POWER CONVERTER
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SALTER DUCK WAVE ENERGY CONVERTER
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