Tidal power Plant

tidal power plant
why does tidal occurs?
types of Tidal Power plant
Where does it exist

1. Submitted By TIDAL POWER PLANT MIRZA WAJAHAT AHMAD Guided BY DR. M. R. DHARME Department Of Mechanical Engineering DR.Rajendra Gode Institute Of Technology&Research ,Amravati

2. Content Introduction Basic physics of tide How Tides Work..? Tidal Barrages Tidal Current Powe Plant Significant benefits from using Tidal Energy Advantages Disadvantages Conclusion Reference

3. Introduction Tidal power, also called tidal energy, is a form of hydropower that converts the energy of tides into useful forms of power mainly electricity. This is the only form of energy whose source is the moon. Tides are the waves caused due to the gravitational pull of the moon and also sun(though its pull is very low). The rise is called high tide and fall is called low tide. This building up and receding of waves happens twice a day and causes enormous movement of water.

4. BASIC PHYSICS OF TIDE Gravitational pull of the sun and moon and the pull of the centrifugal force of rotation of the earth-moon system. When a landmass lines up with the earth-moon system, the Water around it is at HIGH TIDES When a landmass is at 90 to the earth-moon system, the water around it is at LOW TIDES. There are two high tides and two low tides during each period of rotation of the earth. Flood Currents: currents moving in the direction of the coast. Ebb Currents: the current receding from the coast

5. HOW TIDES WORK..?

6. World Map of the Distribution of Tidal Energy Red areas show most intense tidal energy

7. HISTORY The first tidal power station was the Rance tidal power plant built over a period of 6 years from 1960 to 1966 at La Rance , France. It has 240 MW installed capacity. Also the world's second biggest tidal power station. With a peak rating of 240 Megawatts, generated by its 24 turbines, it supplies 0.012% of the power demand of France. With a capacity factor of approximately 40%, it supplies an average 96 Megawatts, giving an annual output of approximately 600GWh.

8. Two types of Tidal Plant facilities . Its classified as… Tidal barrages. Tidal current turbines.

9. 1.Tidal Barrage Utilize potential energy Tidal barrages are typically dams built across an estuary or bay. Consist of turbines, sluice gates, embankments, and ship locks. Single basin system Double-basin system TWO TYPES

10. WORKING PRINCIPLE OF Tidal Barrage

11. Current sites of tidal barrages • La Rance , Brittany, France The first and 2nd largest tidal barrage power plant Constructed between 1961 and 1967. Situated on the Rance River. Contains 24 reversible 10 MW bulb turbines generating a capacity of 240 MW and a net power output of 480 GWh per year. Two- way generation system and pumped storage.

12. Annapolis Tidal Generation Facility on the Bay of Fundy, Canada Constructed between 1981 and 1984. Generating capacity of 20 MW and a net output of 30 GW h per year. Further development is being considered in the Bay of Fundy.

13. 2. Tidal current turbines Make use of the kinetic energy of moving water to power turbines, in a similar way to wind turbines that use wind to power turbines. Operate during flood and ebb tides. Consists of a rotor, gearbox, and a generator. These three parts are mounted onto a support structure. There are three main types: ▫ Gravity structure ▫ Piled structure ▫ Floating structure

14. Significant benefits from using Tidal Energy include: • Electrification of isolated communities • Generation for the grid • Regrowth of coral reefs using mineral accretion technology • Substitution of imported petroleum used to generate electricity

15. Advantages It is an inexhaustible source of energy. Tidal energy is environment friendly energy and doesn't produce greenhouse gases. As 71% of Earth’s surface is covered by water, there is scope to generate this energy on large scale. We can predict the rise and fall of tides as they follow cyclic fashion. Efficiency of tidal power is far greater as compared to coal, solar or wind energy. Its efficiency is around 80%. Although cost of construction of tidal power is high but maintenance costs are relatively low

16. Disadvantages  Cost of construction of tidal power plant is high. There are very few ideal locations for construction of plant and they too are localized to coastal regions only. Intensity of sea waves is unpredictable and there can be damage to power generation units. Influences aquatic life adversely and can disrupt migration of fish. The actual generation is for a short period of time. The tides only happen twice a day so electricity can be produced only for that time. Frozen sea, low or weak tides, straight shorelines, low tidal rise or fall are some of the obstructions.

17. Conclusion Tidal energy is a kind of renewable energy with large potential. It has many advantages over solar and wind energy. For example, the availability of tidal energy is highly predictable and not subject to the impact of weather condition. The energy density of tides is also higher than solar and wind energy.

18. Reference   “Tidal energy-a premier” by Michael Maser of Blue energy Canada Inc.2004. www.energyocean.com www.blueenergy.com Blue Energy Canada Inc. Tidal energy update 2009 Applied Energy , Volume 87, Issue 2 , February 2010, Pages 398-409 Fergal O Rourke , Fergal Boyle, Anthony Reynolds http://www.emec.org.uk/

19. Thank You