TIDAL GENERATORS HOW DO THEY WORK

PRESENTED BY:-SHUBHAM DIXIT

A3MA-02

CONTENTS:-INTRODUCTIONTIDES & TIDAL POWERTIDAL GENERATORSCLASSIFICATION(1) TIDAL STREAM GENERATORS(2) TIDAL BARRAGES(3) DYNAMIC TIDAL GENERATORSCOMPARISIONFUTURE OF TIDAL GENERATORSCONCLUSION

INTRODUCTION:-WHY TIDAL GENERATORS CAME INTO EXISTANCE?

RENEWABLE ENERGY SOURCEIMPROVED ENERGY SECURITYMOST EFFICIENT ENERGY RESOURCENO GREENHOUSE GAS EMMISION

TIDES & TIDAL POWER:-Rise and fall in sea levels Caused by the combined effect of

moon and sun.Tides are quite predictable.

TIDAL GENERATORS:-WORKING PRINCIPLE:- Consists of a turbine & an electrical

generator(alternator).

Turbines/windmill like blades are installed on the ocean floor.

Turbine and generator are connected directly or by a gearbox.

Due to kinetic or potential energy of sea water the turbine rotates.

Generator rotates and produces electricity

At shore, electricity can be distributed.

CLASSIFICATIONTidal Generator

Tidal stream generators

Tidal barrages

Dynamic tidal generators

TIDAL STREAM GENERATORS:-It make use of kinetic energy

of moving water.The power taken by turbine is

given by P=(rCpAV3 )/2

It’s design is similar to wind turbines but it’s performance is better.

TIDAL V/S WIND TURBINES:-Requirement

of land.

Density difference

predictability

TIDAL BARRAGES:-It make use of potential

energy of sea water.Difference in water level b/w

barrage & sea is used.It consist of turbine, sluice gate,

a basin to store water etc.During high tides the basin is

filled through sluice gate.

DYNAMIC TIDAL POWER:-DTP is an untried but

promising technology. an interaction between potential

and kinetic energies in tidal flows.

Very long dams( 30–50 km length) from coast to coast are needed.

By this Tidal phase differences are introduced across the dam.

COMPARISION :-Advantages:- Inexhaustible energy resourceMost efficient energy sourcePredictabilityNo green house gas emissionProtect from dangerous tides

Disadvantages:-EcologicalCorrosionHigh investment at startCan not produce electricity continuously

FUTURE OF TIDAL GENERATERS:-Sihwa Lake Tidal Power Station(254MW) in

South Korea.Rance Tidal Power Station(240MW) in

France.

812 MW tidal barrage near Ganghwa Island (South Korea) Completion is planned for 2015.

A 1,320 MW barrage is proposed by the South Korean government, with projected construction start in 2017.

CONCLUSION:-Tidal energy is a promising renewable energy

source available to the world . since the past one decade, numerous R&D efforts have been carried out hoping that tidal energy can become a realistic renewable energy source one day.

REFERENCES:-http://en.wikipedia.org/wiki/Tidal_powerhttp://en.wikipedia.org/wiki/TideMarine tidal current electric power

generation: State of art &current status

-Yun Seng Lim & Siong Lee Koh

University of Tunku Abdul Rahman ,Malaysia

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