Under water windmill
ABSTRACT: Windmills are usually used to extract power from wind energy. Underwater
windmills are used to extract energy from the water flow of oceans. Underwater windmills
can also be called as Tidal stream turbines. They use kinetic energy of the moving water as
wind blades use moving air. The principal of an underwater windmill is same as the usual
windmill. A set of blades creating electrical energy converted from mechanical energy moved
with the help of aqueous fluent of water. Tides are used to throw water against slanting
blades and make them spin. Ocean has different currents at different depths. It was published
in the article that near the seabed neither the whirlpools are consequent current passes in the
contrary direction. Towers can be built to extract power for such cases. Protection of sea life
is also important. Due to the considerable amount of solid over air underwater windmill has
slow rotation. Windmills can be put in the river superior ocean currents. It is coated with
Teflon or other slippery material.
INTRODUCTION: To overcome the problem of the consumption of electricity due to
which power failures are there many times in summer season in Chennai and also in many
parts of Tamil nadu. To overcome this problem of overloading in this state we can go for
underwater Turbine which can produce electricity at an extent about 30MW of energy per
10hour. They are essentially windmills installed onto an ocean floor or river bed. The
underwater 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's plugged into an electrical
grid, the electricity can be distributed.
The advantages offered by MCTs, it is rather surprising that this technology has not received
much attention in terms of research and development. There are many fundamental issues of
research and various key aspects of system design that would require investigation. A major
research effort is needed in order to expedite the application of the marine current kinetic
energy converters. Virtually no work has been done here.
Literature review on under water windmill
Author
Tittle of paper
V. B.
Under water
Bhajbhuje windmill
, P. S.
Malode
, K. M.
Hemnani
Issue 9
vol 3
Ashutosh
Mishra
Methodology
Underwater
turbines operate
on the same
principles that
wind turbines use;
a flow of fluid
moves a set of
blades creating
mechanical
energy which is
then converted to
electrical energy.
One advantage
water places in the
sea. The
technology
consists of rotors
mount. The
technology
consists of rotors
mounted on steel
piles (tubular steel
columns) set into
a socket drilled in
the seabed. The
rotors are driven
by the flow of
water in much the
same way that
windmill rotors
are driven by the
wind, the main
difference being
that water is more
than 800 times as
dense as air, so
quite slow
velocities in water
will generate
significant
amounts of power.
How to generate
Tidal turbines are
electricity from
very much like
UnderwaterTurbine underwater
Advantages & Objective
Disadvantages
Advantages:
Tidal energy is
completely
renewable.
Tidal energy
produces no
emissions.
Energy output is
a 100% reliable,
tides are as sure
as the moon.
Hidden beneath
the water.
Disadvantages
The major
difficulties with
this type of
system is that the
off shore turbines
cost more money
than land / wind
based turbines.
Fishing has to be
restricted in the
areas of the
power plant.
Damages habitat
up to 500km
away
Development
of a robust
offshore
renewables
industry can:
Reduce
reliance on
foreign oil.
Rely upon
ocean terrain
for power
generation as
opposed to
onshore land
resources.
Revitalize
shipyards,
coastal
industrial parks
and shuttered
naval bases.
Create jobs in
coastal
communities
Advantages:
Ocean energy
 One of the most can play a
significant role
important and
Volume
8, Issue 7,
July-2017
Omkar P.
Kedar1,
Ganesh
Fodase2
A Review on
Under Water
Windmill
windmills except
the rotors are
driven by
consistent, fastmoving currents.
The submerged
rotors harness the
power of the
marine currents to
drive generators,
which in turn
produce
electricity. Water
is 832 times
denser than air
and consequently
tidal turbine rotors
can be much
smaller than wind
turbine rotors thus
they can be
deployed much
closer together
and still generate
equivalent
amounts of
electricity Devices
that harness
marine current
energy present a
unique set of
engineering
challenges in
terms of design,
installation and
maintenance. The
unique design of
Sea Gen allows
capture of the
maximum amount
of tidal energy
whilst keeping
maintenance and
connectivity costs
low
A flow of fluid
moves a set of
blades creating
mechanical
energy which is
highly significant
benefits of using
the power of the
tides is that there
are no fuel costs.
The energy is
fuelled is by the
reliable and
sustainable force
of the ocean .
Although initial
construction costs
are high , the
overall
maintenance of
the equipment
and the return of
power in the form
of electricity can
help offset this
expense.
Disadvantages:
They are also
used to maintain
as they function
under water.
Furthermore, sea
water is corrosive
to steel and other
metals because of
salt contain.
in our nation’s
renewable
energy
portfolio. With
the right
support, the
ocean energy
industry can be
competitive
internationally.
With the right
encouragement,
ocean
renewable
energy
technologies
can help us
reduce our
reliance on
foreign oil –
fossil fuels, in
general – and
provide clean
energy
alternatives to
conventional
power
generating
systems.
Advantages:
Tidal energy is
totally renewable
& it doesn’t
generate emission
More and more
people have
recognized the
importance of
the renewable
Volume:
05 Issue:
03 | Mar2018
then converted to
electrical energy.
They are equally
troublesome for
environmentalists,
as wind turbines
interrupt bird
flights just as
water turbines can
disturb
underwater life.
One advantages
water turbine
enjoy over other
sources of
renewable energy
is a predictable
tide table. Ocean
energy device
works on the same
principles as a
windmill, where
large underwater
rotors, shaped like
propellers, are
driven by the huge
mass of flowing
water to be found
at certain places in
the sea. The
technology
consists of rotors
mounted on steel
piles (tubular steel
columns) set into
a socket drilled in
the seabed. The
rotors are driven
by the flow of
water in much the
same way that
windmill rotors
are driven by the
wind, the main
difference being
that water is more
than 800 times as
dense as air, so
quite slow
velocities in water
It is placed under
the water
No fuel cost
It is an emissionfree power source
It replaces other
electricitygenerating
techniques which
depend on fossil
fuel burning like
coal, so the
greenhouse effect
can be caused.
Disadvantages:
The initial cost is
very high
Installation
underwater is
very difficult
To avoid the
corrosion of the
blade, it must be
coated
Damages habitat
up to 500m away
Difficult to
maintain
energy, the vast
coastal and
offshore areas
contributes one
of renewable
resources, i.e.
the tidal stream
energy, to the
entire energy
consumption.
The emphasis
has been put on
tidal turbine
concepts.
Indeed, it has
been described
the strength
and the
weakness of
the major tidal
turbine
technologies.
Moreover,
attempts have
been made to
highlight
current trends
and alternative
issues for
generator
topologies.
MCT believes
it is well on
track to
delivering
commercial
tidal stream
technology
with the
potential to
supply
electricity on a
large-scale, at
low cost and
without
pollution. It is
believed that
the concepts
under
development
will generate
significant
amounts of power.
The energy
generated, being
derived from tides
has the added
significant
advantage of
being predictable.
by MCT will
become one of
the primary
techniques for
extracting
energy from
the seas.