TIDAL POWERTIDAL POWER Generation of Electricity UsingGeneration of Electricity Using Tidal Energy Tidal Energy

Presented by Presented by :: * *NishaNt KumarNishaNt Kumar Reg. No. 0701209350Reg. No. 0701209350 Electrical & Electronics EngineeringElectrical & Electronics Engineering Silicon institute of technology , Silicon institute of technology , BhubaneswarBhubaneswar

OUTLINEOUTLINE IntroductionIntroduction Tidal barrageTidal barrage Electricity GenerationElectricity Generation PumpingPumping Advantages and Advantages and

DisadvantagesDisadvantages ConclusionConclusion

IntroductionIntroductionToTo

Tidal EnergyTidal Energy

Why do the tides come and Why do the tides come and gogo ? ?

It is all to do with the gravitational force of the Moon It 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 the The gravitational force of the moon causes the oceans to bulge along an axis pointing directly at the oceans to bulge along an axis pointing directly at the moon. The magnitude of this attraction depends on moon. The magnitude of this attraction depends on the mass of the object and its distance away the mass of the object and its distance away

Spring TidesSpring Tides

When the sun and moon are in a line their When the sun and moon are in a line their gravitational attraction on the earth combine and gravitational attraction on the earth combine and cause a “spring” tidescause a “spring” tides

Neap TidesNeap Tides

When they are as positioned in 90° from each When they are as positioned in 90° from each other, their gravitational attraction each pulls water other, their gravitational attraction each pulls water in different directions, causing a “neap” tidesin different directions, causing a “neap” tides

TIDAL BARRAGETIDAL BARRAGE

Barrage is built across an estuary or bay Barrage is built across an estuary or bay that experiences an adequate tidal rangethat experiences an adequate tidal range

The barrage blocks the incoming and The barrage blocks the incoming and out-going tides of a coastal basinout-going tides of a coastal basin

The water trapped within the basin creats The water trapped within the basin creats a hydrostatic heada hydrostatic head

Electricity GenerationElectricity Generation

Generating SystemGenerating System A dam (barrage) is A dam (barrage) is

built across the built across the mouth of an mouth of an estuary.estuary.

Sluice gates allow Sluice gates allow incoming tides to incoming tides to fill the basin.fill the basin.

As the tide ebbs, As the tide ebbs, the water is forced the water is forced through a turbine through a turbine system to system to generate generate electricity.electricity.

Different Types of GeneratingDifferent Types of Generating System System

Bulb Turbine SystemBulb Turbine System

Rim Turbine SystemRim Turbine System

Oscillating water column SystemOscillating water column System

Bulb Turbine SystemBulb Turbine System

A bulb turbine is one in which water flows A bulb turbine is one in which water flows around the turbinearound the turbine

Rim Turbine SystemRim Turbine System

The generator is mounted at right angles to The generator is mounted at right angles to the turbine blades, making access easierthe turbine blades, making access easier

Oscillating water column Oscillating water column SystemSystem Incoming waves force Incoming waves force

air up column to turn air up column to turn the turbinethe turbine

Outgoing waves suck Outgoing waves suck air down column to turn air down column to turn the turbinethe turbine

PumpingPumping

The turbines in the barrage can be used The turbines in the barrage can be used to pump extra water into the basin at to pump extra water into the basin at periods of low demand, generally at night periods of low demand, generally at night when demand is low, extra water is when demand is low, extra water is pumped in and then power is generated pumped in and then power is generated at times of high demand at times of high demand

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 is The techno-economic feasibility report is now being examinednow being examined

ADVANTAGESADVANTAGES * * Once you've built it, tidal power is free Once you've built it, tidal power is free

It produces no green-house gases or other It produces no green-house gases or other waste waste

It needs no fuel It needs no fuel

Not expensive to maintain Not expensive to maintain

Permits the simultaneous use of the dam for Permits the simultaneous use of the dam for a road or rail roada road or rail road

Provides a non-polluting and inexhaustible Provides a non-polluting and inexhaustible supply of energysupply of energy

DISADAVANTAGESDISADAVANTAGESBuilding of barrage is expensiveBuilding of barrage is expensive

Needs a wide area Needs a wide area

Few suitable sites availableFew suitable sites available

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

CONCLUSIONCONCLUSION

Tidal power is a proven technology and Tidal power is a proven technology and has the potential to generate significant has the potential to generate significant amounts of electricity at certain sites amounts of electricity at certain sites around the worldaround the world

Although, our entire electricity needs Although, 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 renewable it can be invaluable source of renewable energyenergy

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.

Thank YouThank You