Underwater windmill is similar to the tradition windmill except it works on motion of seawater.

1. UNDERWATER
WINDMILL

2. What We Are Going To Learn
• What is mean by underwater windmill.
• Components of underwater windmill.
• Mechanism of underwater windmill.
• Advantages & disadvantages.

3. • A device that extracts power from the tides
• Similar to wind energy technology, with the rotor
blades driven not by wind power but by tidal
currents.
• A swift tidal current, which spins the long blades
of the turbine . which in turn produces electricity
via different parts of underwater windmill .
Underwater windmill

4. Why it is called as
“underwater windmill” ?
• "Basically it's like putting a windmill in the
water,"
• Or as it’s looking like a wind mill & are
installed on the ocean floor and large river
bed , that means these are under the water.

7. Main parts
• Turbines
• Gearbox
• Generator
• Cables
• Support

8. Principle of operation
• In simple a underwater windmill consists of a
number of blades mounted on a hub
(together known as the rotor), a gearbox, and
a generator.
• The hydrodynamic effect of the flowing
water past theblades causes the rotor to
rotate, thus turning the generator to which
the rotor is connected via a gearbox.

9. • The gearbox is used to convert the rotational
speed of the rotor shaft to the desired output
speed of the generator shaft.
• The electricity generated is transmitted to land
through cables.

10. Implementation
• The company Atlantis Resources is to install a
50MW tidal farm in the Gulf of Kutch on India's
west coast, with construction starting early in
2012.The facility could be expanded to deliver more
than 200MW.
• Projections indicate that the cost of the initial
50MW farm - to consist of 501MW turbines - will
come in at about $150m.

11. Advantages
• Tidal energy is completely renewable.
• Tidal energy produces no emissions.
• Hidden beneath the water.
• Have lesser impact on the environment
• Low running cost
• Long lifetime with little maintenance

12. Disadvantages
• The initial cost is too high
• Very difficult to install
• The blade must be coated to avoid corrosion
• Damages habitat up to 500km away

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