Submitted By:

DJ

SEMINAR

ON

UNDERWATER WINDMILL

CONTENT

INTRODUCTION

NAME JUSTIFICATION

MAIN PARTS

PRINCIPLE OF OPERATION

BLOCK DIAGRAM

WORKING

ADVANTAGES

DISADVANTAGES

CONCLUSION

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 .

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

MAIN PARTS

Turbines

Gearbox

Generator

Cables

support

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

Block Diagram

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

Once it is plugged into an electrical grid, the

electricity can be disturbed

Schematic diagram of Under water floating wind mill

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

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

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

THANK YOU