Underwater windmills

1. Underwater Windmill
.

2. CONTENT
 WHAT IS IT ?
 MAIN PARTS
 PRINCIPLE OF OPERATION
 IMPLIMENTATION
 ADVANTAGES
 DISADVANTAGES
 GLOBAL RESOURCES
 CONCLUSION
 REFERENCES

3. What is it ???
Underwater windmills are used to
extract energy from the water flow
of oceans. Underwater windmills
can also be called as Tidal stream
turbines.

4. VIEWS:1

5. VIEWS:2

6. MAIN PARTS
 Turbines
 Gearbox
 Generator
 Cables
 support

7. 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 the
blades causes the rotor to rotate, thus turning the
generator to which the rotor is connected via a
gearbox.
 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

8. IMPLIMENTATION
 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.
 The current timescale has the project's final
engineering plans completed by the end of this Year
2013.

9. 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
 Reduces the dependence upon fossil fuels

10. 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

11. GLOBAL RESOURCES

12. Conclusion
 we believe that the intense and predictable
marine current resource offers the possibility
of clean energy at a cost that will ultimately
be competitive not only with the other
renewables, but in the long run we believe
we can compete head on with most forms of
fossil fuelled power generation at present-
day costs.

13. REFERENCES
 www.google.com
 www.wikipedia.com

14. Thank you