Posted by ARJUN on Dec. 6, 2012, 1:59 p.m.
AIM:
To produce electricity from a renewable source such as sea
water, in a cheap rate. And also use this electricity for small scale
electronic gadgets.
APPARATUS:
ü 10 plastic bottles of 100 ml capacity
ü 1 bottle of 250 ml capacity
ü 10 zinc electrodes
ü 10 carbon electrodes
ü Copper wires(insulated)
ü Multi-meter
ü Led bulbs
ü Araldite
ü Straws
ü Blades and other supporting materials
WORKING PRINCIPLE:
i.
Like every
electro-chemical cells it works on the basis of a redox reaction taking place
inside the system. Since a reactive metal like zinc is placed in water zinc get
oxidized to release electrons. These electrons flow through wires towards
carbon electrode producing electricity.
ii. Salt water gives better result by producing more electricity. That is salt water is a good conductor of electricity while pure water is a bad conductor. It is because when salt is dissolved in water, it dissociates into positive and negative ions and conducts electricity.
iii. Connection of cells:
Cells
can be connected in 2 patterns
Ø Series
Ø Parallel
During a series type connection the voltages of the individual cells get sum up.
While in a parallel combination of cells voltage remains same throughout the circuit.
PROCEDURE:
v Take 10 plastic bottles and make 2
holes on its lid so as to put insert 2 copper wires without touching each
other.
v 
Put 2 holes in the sides of bottle as
shown and insert 2 straws for water supply when connected as a battery.
v Using araldite seal the holes to
prevent water leakage.
v Tie one end of each zinc electrodes
and carbon electrodes with copper wires with insulation.
v After preparing the electrodes, keep
them in bottles as shown through the holes made.
v Since zinc is the negative terminal,
carbon is positive terminal, connect these bottles in series.
v Pour water and wait for 2 minutes.
v Using a multi-meter find the voltage
and current across the battery.
v 
Connecting the system to a reservoir tank can help
easier distribution of water as shown.
v Can also connect system in parallel
and check current and voltage produced.
OBSERVATIONS:
Voltage of
1.4V is produced per cell. In series connection battery produces 10V voltage is
produced after loses.
RESULT:
Oceano-cell is functional with a
voltage output of 10V when connected in series.
USES:
vCan light 4-5 LED bulbs together.
vCan charge mobile phones.
vWhen done in large scale can power
street lights etc.