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.
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

16. 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

17. 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

18. 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.

19. 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.

20. 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/

21. Thank You