1. A SMART WAY TO EXTRACT TIDAL ENERGY
K. Hari Kishore. V.Chaitanya Prasad, (M-tech).
08MP1A0229 Assoc.Prof. EEE Dept.
Abstract—Man in his lifetime, uses energy in INTRODUCTION
one form or the other. In fact whatever happens This paper attempts to show how energy can be
in nature, results, out of the conversion of tapped from tides in ocean or sea by using simple
energy in one form or the other? The blowing of equipment where almost everybody can handle.
the wind, the formation of the clouds and the More the tides more will be the electrical energy
flow of water are a few examples that stand generated.
testimony to this fact. The extensive usage of A large amount of kinetic energy is wasted in
energy has resulted in an energy crisis, and there sea or ocean every time a tide passes on it. There
is a need to develop methods of optimal is great possibility of tapping this energy and
utilization, which will not only ease the crisis but generating power by making a simple turbine
also preserve the environment. subjected to air which is caused by the motion of
This paper attempts to show how energy can tides.
be tapped from tides in ocean or sea by using The generated power can be used for the lamps
simple equipment where almost everyone can near the coastal areas and this will be a great boon
handle it. More the tides more will be the energy for the villages and even towns near sea or an
generated. There is possibility of tapping the ocean.
energy and generating power by making a simple
turbine subjected to air which is caused by the SCOPE OF THE PAPER
motion of tides. The generated power can be The utilization of energy is an indication of the
used for the lamps near the coastal areas and growth of a nation. For example, the per capital
this will be a great boon for the rural villages energy consumption in USA is 9000 KWh (Kilo
nearer to sea or ocean too. Watt hour) per year, whereas the consumption in
My paper explains clearly, the working India is 1200 KWh (Kilo Watt hour). One might
principle of the designed system and its conclude that to be materially rich and prosperous,
advantages. Design of each component has been a human being needs to consume more and more
carried out using standard procedures, and the energy.
components have been fabricated and assembled. A recent survey on the energy consumption in
The utilization of energy is an indication of the India had published a pathetic report that 85,000
growth of a nation. One might conclude that to villages in India do not still have electricity.
be materially rich and prosperous, a human Supply of power in most part of the country is
being needs to consume more and more energy. poor. Hence more research and development and
commercialization of technologies are needed in

2. this field. First, the OTEC systems are not very energy
India, unlike the top developed countries has efficient. Pumping water is a giant engineering
very poor maintenance of electricity. Taking the challenge. Electricity must also be transported to
need of a particular industry, it needs a predictable land. It will probably be 10 to 20 years before the
energy source to maintain accuracy in production technology is available to produce and transmit
but here power being supplied to that industry electricity economically from OTEC systems.
from respected sector is highly unpredictable. By
just placing a simple plant in a right place will be WAVE ENERGY CONVERSION USING
very much advantage also for the industries near BUOY
seas or oceans. The wave energy converter (WEC) consists of a
buoy coupled directly to the rotor of a linear
BASIC PRINCIPLES generator by a rope. The tension of the rope is
 Simple energy conversion from mechanical to maintained with a spring pulling the rotor
electrical. downwards. The rotor will move up and down at
 We can develop electricity from ocean tides. approximately the same speed as the wave.
 To generate electricity using the wind caused The linear generator has a uniquely low pole
by ocean tides energy as input. height and generates electricity at low wave
 Three mechanisms can be used: amplitudes and slow wave speeds.
I. Ocean Thermal Energy Conversion
FLOATING WAVE ENERGY EXTRACTER
II. Wave Energy Converter & Floating
Wave Energy Extractor The system is consists of a rectangular shaped
huge mass floating body supported by a large
III. Capturing air through turbines from
the movement of tides number of floating air columns. The air column’s
extensions are connected to pistons. The pistons
OCEAN THERMAL ENERGY are placed its own cylinders and it can move up
CONVERSION (OTEC) and down through the cylinders when the floating
The energy from the sun heats the surface air columns moves with the up-down movements
water of the ocean. In tropical regions, the surface of the waves. The upper side of the cylinders has
water can be 40 or more degrees warmer than the two valves. One to a high-pressure fluid pipe and
deep water. This temperature difference can be it will open when the floating air column on crest.
used to produce electricity. The OTEC system One valve is to the low-pressure fluid pipe and it
must have a temperature difference of at least 25 will open when the floating air column on the
degrees Celsius to operate, limiting use to tropical trough.
regions. The whole system is anchored to the sea
bottom.

3. CAPTURING AIR THROUGH TURBINES process is continues till the end of the universe.
FROM THE MOVEMENT OF TIDES The movement of tides contains kinetic energy.
Kinetic energy (movement) exists in the When a long barrel is inserted on the surface of
moving waves of the ocean. That energy can be sea, the to-fro motion of waves produces pressure
used to power a turbine. If a long barrel is inserted on air inside the barrel and gets exhaled and
into the sea, the wave rises into the barrel. The inhaled from it continuously.
rising water forces the air out of the barrel. The A turbine is placed on the other end of the
moving air spins a turbine which can turn a barrel where inlet and outlet of air takes place;
generator. this rotates the turbine and electricity is generated.
When the wave goes down, air flows
through the turbine and back into the barrel CONSTRUCTION DETAILS
through doors that are normally closed. The basic and important elements used in
This is only one type of wave-energy construction are:
system. Others actually use the up and down  LONG BARREL
motion of the wave to power a piston that moves  TURBINE
up and down inside a cylinder. That piston can  ELECTRIC DYNAMO
also turn a generator.  PLACEMENT
Most wave-energy systems are very small.
But, they can be used to power a warning buoy or LONG BARREL:
a small light house. Barrel used is usually made of strong synthetic
which can be of anticorrosive long lasting material
ELECTRICITY GENERATION FROM like PVC etc.
WAVE ENERGY CONVERSION BY
CAPTURING AIR TURBINE:
As we have seen the process of capturing air Generally turbines rotate in a direction
through turbines from the movement of tides, this corresponding to the direction of air but here in
process seems simpler and cost efficient to satisfy order to use wind completely from both the
basic needs of a small village near a sea or an ocean. directions we are using a special turbine called
All the equipment we need is nothing but a large Wells Turbine which can rotate in a single
and long synthetic barrel, a turbine, a generator and direction irrespective to the direction of wind as
energy storing devices. shown in figure 1.
Wells Turbine is unidirectional turbine which
WORKING PROCEDURE lets great advantage by reducing the cost of
The tides on seas and oceans are caused due to equipment used to convert to and fro motion of
the gravitational pull of Sun and Moon, this turbine to rotating motion.

4. CONCLUSION
As day by day power consumption increases
but electric crisis occur. So the minor needs of
electricity such as street lights and traffic signals
in urban areas beside seas or oceans and basic
needs of villages beside oceans or seas can be
satisfied by Tidal Energy. Instead of wasting
kinetic energy of Tides in oceans or seas, the
minor needs can be met by converting kinetic
energy to electrical energy.
Figure1: Wells Turbine REFERENCES
1. www.wikipedia.com
ELECTRIC DYNAMO:
2. Renewable energy ’THE FUTURE’ by grseg
It is a device which converts mechanical
clofer (volume 3)
energy into electrical energy.
3. ‘New Ways of power’ by Alka Datta
4. Site: www.patentstorm.com
PLACEMENT:
5. Powerpedia.com
Placement of the equipment shall be focused
6. Planet Mechanics ‘National
properly to see that the variation of tides shall be
Geography’converting kinetic energy to
more and to place the barrel vertically, the spot
electrical energy.
should be chosen in such a way that the length of
the barrel should be properly accommodated.
ADVANTAGES
 Low budget electricity production
 Less surface area
 No disturbance to marine lives
 Easy maintenance
 Suitable to satisfy basic needs
 Uses: Charging batteries and using them to
light up the streets, etc.