The document summarizes an underwater windmill seminar presentation. It introduces the technology as extracting power from tides similarly to how wind turbines extract power from wind. It then describes the main parts of an underwater windmill as turbines, a gearbox, generator, cables, and support structure. It explains that tidal currents spin the rotor blades which drive the generator via the gearbox to produce electricity transmitted via cables. The presentation covers advantages like renewable energy generation and disadvantages like high installation costs.

1. Seminar on
Underwater Windmill
Presented by
Shahbaz Baig
Guided by
Prof. A.P.Agarkar
DEPARTMENT OF ELECTRICAL & ELECTRONICS ENGINEERING
PROF RAM MEGEH COLLEGE OF ENGINEERING AND MANAGEMENT-
BATCH
(2017-18)

2. CONTENTS
• INTRODUCTION
• NAME JUSTIFICATION
• MAIN PARTS
• PRINCIPLE OF OPERATION
• BLOCK DIAGRAM
• WORKING
• ADVANTAGES
• DISADVANTAGES
• CONCLUSION

3. Introduction
• An Underwater windmill like a device that extracts power from
the tides. Renewable energy technologies are becoming an
increasingly favourable alternative to conventional energy
sources to assuage fossil fuel related issues. Tidal energy offers a
vast and reliable energy source.
• This technology is similar to wind energy technology, with the
rotor blades driven not by wind power but by tidal currents.
• The gravitational pull of the moon produces a swift tidal current,
which spins the long blades of the turbine . Which in turn
produces electricity via different parts of underwater windmill .

4. NAME JUSTIFICATION
• Why it is called as “underwater windmill” ?
• "Basically it's like putting a windmill in the
water," -Bjorn Bekken
• Or as it’s looking like a wind mill & are
installed on the ocean floor and large river
bed

5. MAIN PARTS
• Turbines
• Gearbox
• Generator
• Cables
• Support

6. PRINCIPLE OF OPERATION
• an underwater windmill consists of a rotor, gearbox,
and a generator
• Water flows => Rotor rotates => turn ON generator
• 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
• The turbines can convert kinetic hydro energy into
power

7. Block Diagram
• Fig . Block diagram of underwater
windmill

8. WORKING
• Under water turbines are a fairly straight forward
concept, as far as cutting edge energy technology
goes
• They are essentially windmills installed onto an
ocean floor or river bed
• The under water current produced by the tides spins
blades arranged like an airplane propeller
• These turbines are attached to a gear box, which is
connected to an electrical generator
• This produces the electricity that is carried by cable
to shore

9. • Once it is plugged into an electrical
grid, the electricity can be disturbed

10. Schematic diagram of Under water
floating windmill

11. ADVANTAGES
• Tidal and ocean current is completely renewable.
• Tidal and ocean current 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

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

13. Conclusion
• Tides and ocean current play is very important role in
the formation of global climate as well as eco system
for ocean habitats
• 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 renewable
• But in the long run we believe we can compete head
on with most forms of fossil fuelled power
generation at present-day costs

14. Reference
• Book name ( Robert.H.Williams )

15. THANK YOU