Tidal power is a proven technology and has the potential to generate significant amounts of electricity at certain sites around the world. Although, our entire electricity needs could never be met by tidal power alone, it can be invaluable source of renewable energy.

1. TIDAL POWERTIDAL POWER
Generation of Electricity UsingGeneration of Electricity Using
Tidal EnergyTidal Energy
Presented byPresented by ::
**NishaNt KumarNishaNt Kumar
Reg. No. 0701209350Reg. No. 0701209350
Electrical & Electronics EngineeringElectrical & Electronics Engineering
Silicon institute of technology ,Silicon institute of technology ,
BhubaneswarBhubaneswar

2. OUTLINEOUTLINE
 IntroductionIntroduction
 Tidal barrageTidal barrage
 Electricity GenerationElectricity Generation
 PumpingPumping
 Advantages andAdvantages and
DisadvantagesDisadvantages
 ConclusionConclusion

3. IntroductionIntroduction
ToTo
Tidal EnergyTidal Energy

4. Why do the tides come andWhy do the tides come and
gogo ??
 It is all to do with the gravitational force of the MoonIt is all to do with the gravitational force of the Moon
and Sun, and also the rotation of the Earthand Sun, and also the rotation of the Earth
 The gravitational force of the moon causes theThe gravitational force of the moon causes the
oceans to bulge along an axis pointing directly at theoceans to bulge along an axis pointing directly at the
moon. The magnitude of this attraction depends onmoon. The magnitude of this attraction depends on
the mass of the object and its distance awaythe mass of the object and its distance away

5. Spring TidesSpring Tides
 When the sun and moon are in a line theirWhen the sun and moon are in a line their
gravitational attraction on the earth combine andgravitational attraction on the earth combine and
cause a “spring” tidescause a “spring” tides

6. Neap TidesNeap Tides
 When they are as positioned in 90° from eachWhen they are as positioned in 90° from each
other, their gravitational attraction each pulls waterother, their gravitational attraction each pulls water
in different directions, causing a “neap” tidesin different directions, causing a “neap” tides

7. TIDAL BARRAGETIDAL BARRAGE
 Barrage is built across an estuary or bayBarrage is built across an estuary or bay
that experiences an adequate tidal rangethat experiences an adequate tidal range
 The barrage blocks the incoming andThe barrage blocks the incoming and
out-going tides of a coastal basinout-going tides of a coastal basin
 The water trapped within the basin creatsThe water trapped within the basin creats
a hydrostatic heada hydrostatic head

8. Electricity GenerationElectricity Generation

9. Generating SystemGenerating System
 A dam (barrage) isA dam (barrage) is
built across thebuilt across the
mouth of anmouth of an
estuary.estuary.
 Sluice gates allowSluice gates allow
incoming tides toincoming tides to
fill the basin.fill the basin.
 As the tide ebbs,As the tide ebbs,
the water is forcedthe water is forced
through a turbinethrough a turbine
system tosystem to
generategenerate
electricity.electricity.

10. Different Types of GeneratingDifferent Types of Generating
SystemSystem
Bulb Turbine SystemBulb Turbine System
Rim Turbine SystemRim Turbine System
Oscillating water column SystemOscillating water column System

11. Bulb Turbine SystemBulb Turbine System
 A bulb turbine is one in which water flowsA bulb turbine is one in which water flows
around the turbinearound the turbine

12. Rim Turbine SystemRim Turbine System
 The generator is mounted at right angles toThe generator is mounted at right angles to
the turbine blades, making access easierthe turbine blades, making access easier

13. Oscillating water columnOscillating water column
SystemSystem
 Incoming waves forceIncoming waves force
air up column to turnair up column to turn
the turbinethe turbine
 Outgoing waves suckOutgoing waves suck
air down column to turnair down column to turn
the turbinethe turbine

14. PumpingPumping
 The turbines in the barrage can be usedThe turbines in the barrage can be used
to pump extra water into the basin atto pump extra water into the basin at
periods of low demand, generally at nightperiods of low demand, generally at night
when demand is low, extra water iswhen demand is low, extra water is
pumped in and then power is generatedpumped in and then power is generated
at times of high demandat times of high demand

15. Tidal Power in IndiaTidal Power in India
 Gulf of CambayGulf of Cambay
((7000 MW7000 MW ))
 Gulf of KutchGulf of Kutch
((1200 MW1200 MW ))
The techno-economic feasibility report isThe techno-economic feasibility report is
now being examinednow being examined

16. ADVANTAGESADVANTAGES
** Once you've built it, tidal power is freeOnce you've built it, tidal power is free
It produces no green-house gases or otherIt produces no green-house gases or other
wastewaste
It needs no fuelIt needs no fuel
Not expensive to maintainNot expensive to maintain
Permits the simultaneous use of the dam forPermits the simultaneous use of the dam for
a road or rail roada road or rail road
Provides a non-polluting and inexhaustibleProvides a non-polluting and inexhaustible
supply of energysupply of energy

17. DISADAVANTAGESDISADAVANTAGES
Building of barrage is expensiveBuilding of barrage is expensive
Needs a wide areaNeeds a wide area
Few suitable sites availableFew suitable sites available

18. La Rance tidal power station ( 240 MW )La Rance tidal power station ( 240 MW )

19. CONCLUSIONCONCLUSION
 Tidal power is a proven technology andTidal power is a proven technology and
has the potential to generate significanthas the potential to generate significant
amounts of electricity at certain sitesamounts of electricity at certain sites
around the worldaround the world
 Although, our entire electricity needsAlthough, our entire electricity needs
could never be met by tidal power alone,could never be met by tidal power alone,
it can be invaluable source of renewableit can be invaluable source of renewable
energyenergy

20. References:References:
 www.google.comwww.google.com (papers on Tidal power(papers on Tidal power
generation ).generation ).
 IEEE papers on Tidal power in India.IEEE papers on Tidal power in India.

21. Thank YouThank You