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# Tidal generaters how do they work

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### Tidal generaters how do they work

1. 1. PRESENTED BY:- SHUBHAM DIXIT A3MA-02
2. 2. CONTENTS:-  INTRODUCTION  TIDES & TIDAL POWER  TIDAL GENERATORS  CLASSIFICATION (1) TIDAL STREAM GENERATORS (2) TIDAL BARRAGES (3) DYNAMIC TIDAL GENERATORS  COMPARISION  FUTURE OF TIDAL GENERATORS  CONCLUSION
3. 3. INTRODUCTION:-  WHY TIDAL GENERATORS CAME INTO EXISTANCE?  RENEWABLE ENERGY SOURCE  IMPROVED ENERGY SECURITY  MOST EFFICIENT ENERGY RESOURCE  NO GREENHOUSE GAS EMMISION
4. 4. TIDES & TIDAL POWER:-  Rise and fall in sea levels  Caused by the combined effect of moon and sun.  Tides are quite predictable.
5. 5. 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.
6. 6. CLASSIFICATION Tidal Generator Tidal stream generators Tidal barrages Dynamic tidal generators
7. 7. 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.
8. 8. TIDAL V/S WIND TURBINES:- Requirement of land. Density difference predictability
9. 9. 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.
10. 10. 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.
11. 11. COMPARISION :- Advantages:-  Inexhaustible energy resource  Most efficient energy source  Predictability  No green house gas emission  Protect from dangerous tides Disadvantages:-  Ecological  Corrosion  High investment at start  Can not produce electricity continuously
12. 12. 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.
13. 13. 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.
14. 14. REFERENCES:-  http://en.wikipedia.org/wiki/Tidal_power  http://en.wikipedia.org/wiki/Tide  Marine tidal current electric power generation: State of art &current status -Yun Seng Lim & Siong Lee Koh University of Tunku Abdul Rahman ,Malaysia  Google images  You tube
15. 15. QUESTIONS ?