This document discusses tidal energy and how it works. It describes how the first tidal power plant was built in 1966 in France and generates 240MW. Tidal power plants harness the energy from tides rising and falling caused by gravitational forces from the moon and sun. There are two main types - tidal barrages which are dams across estuaries and bays, and tidal current turbines which capture the kinetic energy of moving water similar to wind turbines. Tidal power is a renewable source but has high construction costs and may impact aquatic life. It could help reduce greenhouse gas emissions from other power sources.

1. Tidal
Energy
Ismile Hossain
1403EEE00052
Department of Electrical & Electronic Engineering

2. Conte
nts
 Tidal Power
 History
 Tides
 Tides Formation
 How does it works?
 Types of Tidal Plants
 Advantages
 Limitation
 Global Environment Impacts

3. Tidal
Power
Tidal power, also called tidal energy, is a form
of hydropower that converts the energy
of tides into useful forms of power - mainly
electricity.

4. Histo
ry
• First tidal Power
Plant was built by
General De-Gaulle
at La Rance in 1966.
• Generates 240MW.
• The average tidal
range is 8.4m .
• The maximum
range is 13.5m.

5. Tide
s
Tides are the rise & fall of sea levels caused by
the combined effects of the gravitational forces
exerted by the Moon & the Sun & the rotation
of the Earth.

6. Tides
Formati
on

7. Tides
Formati
on
High Tide Low Tide

8. How
does it
works?
Tidal power is actuated by a turbine under water
that spins making the mechanical energy to
electrical through a generator.
The tide flows in two directions under the water.

9. How
does it
works?
Forward flowing tides
turn the propellers
anti-clockwise.
Backward flowing
tides turn the
propellers clockwise.

10. Types
Of Tidal
Plants
Tidal Barrage – Are typically dams,
built across on estuary of bay.
Tidal Current Turbines – Make use o
the kinetic energy of moving water to
power turbines in a similar way to
wind turbines that use to power
turbines.

11. Types
Of Tidal
Plants
Tidal Barrage
Tidal Current
Turbines

12. Advanta
ges
Renewable source of energy.
Environment friendly energy.
Needs no fuel.
Produces electricity reliably.
Not expansive to maintain.
Tides are totally predictable.
Efficiency is far greater as
compared to coal, solar & wind
energy.

13. Limitati
ons
Construction cost is high.
Actual generation is for a short
period of time.
Transmission is expensive &
difficult.
Very few ideal locations for
construction of plant.
Influences aquatic life adversely &
can disrupt migration of fish.

14. Global
Environm
ental
Impact
 The tidal power scheme is a long term
source of electricity.
 This decreases the output of
greenhouse gases into the atmosphere.
 Restriction on movement of aquatic
organism.
 Tidal power is one of the alternative
source of energy that will need to be
developed to satisfy the human demand
for energy.

15. The
End