The document outlines the design and construction of an electronic air cooler utilizing a Peltier module for heat exchange, aiming to create a portable and pollution-free cooling system. It includes details on components such as heat sinks, fans, a water cooling system, and a control unit using Arduino, along with advantages like small size, portability, and environmental friendliness due to the absence of harmful refrigerants. However, it notes the requirement for an additional water cooling system and an external power supply for the Peltier module as drawbacks.

1. Prepared by
Akhil K J
akhil.kj@yahoo.com

2. Objectives :-
To make an electronic air cooler
To make a portable AC
To introduce a pollution free AC

3. Construction:-
The peltier module as a heat exchanger which transfer the heat
from one of it face to another.
There are two heat sinks one of them absorb the heat and other
absorbs the cold.
The cooling effect transferred from the heat sink is done with the
help of a fan.
The heat from the heat sink is removed from the device is done by
the help of water cooling system. The water can be transferred from
the device through the radiator with the help of a small pump.
There is an air filter, which filters the air sucked by the blower.

4. Working:-
• The peltier module transfer the heat from one of it face to another.
• The heat sink gets heated and the other gets cooled.
• The heat on the hotter heat sink is absorbed by the water inside the heat sink.
• The water is then transferred to the radiator.
• The radiator absorb the heat from the water and transfer it to the environment.
• The water is pumped back to the hotter heat sink by the help of the pump.
• On the colder portion the air in the room is sucked by the blower and pass
through colder heat sink.
• The heat of the air is absorbed by the colder heat sink.
• The cooled air is the forced to the room by the blower.

5. Heat sink
Heat sink
Pilter module
Air
filter
Power supply
unit
Control unit
Block diagram
Radiator
Pump
valve
Blow
er

6. • This is used to maintain a healthy operating
temperature of the cooling water. They provide
sufficient air flow in the radiator.
• Here we use a 12V, 0.6A CPU fan as a radiator
fan.
Radiator fans :-

7. Peltier module:-
• It is act as the cooling element in the system. It absorbs the heat from
one side and transfer it to the other side.
• Four 90W, 12V Peltier modules are used here.

8. Power supply unit:-
• It provide the essential power for the system. This unit
contains a multi taped transformer and rectifier circuit.
By changing the terminals we can control the voltage and
thereby the current through the peltier module.
• The supply unit provide an output voltage of 12 v, 40 v
and 48 v .The 12 v system essentially runs the fan and
the control system, the 40 v and 48 v are used to manage
the load at different conditions.48V for maximum output
and 40V for medium output.
• The AC to DC conversion is done by a bridge rectifier
followed by a capacitor filter.

9. Heat sink:-
It is used to distribute the heat and cold efficiently . It consist of a
hot part and a cold part, in the project we use a rectangular hollow
block of GI and Aluminum. The hot part made of GI and the cold part is
made of aluminum. Some limiters are used in the aluminum block for
the maximum heat exchanging.

10. Blower:-
They are provide sufficient air flow in heat
exchangers and in the room. Here we use a
12V BLDC blower.
Air filter :-
It is used to filter the air circulated in the room.
This is simply created by the Miraculous sponge

11. Pump:-
• This is used to provide water circulation in the system. A 16W 230v is
electrical pump is used here . The pump is placed in cabin as an
accumulator.

12. Heat exchanger:-
• It used to reduce the water
temperature.
• Here we use an aluminum heat
exchanger, in which we pass the
hot water through it by the pump.

13. Control unit:-
• To control the entire system we uses an Arduino Uno. This is used to
control the temperature. It collect the data from the external
environment by the help of the sensor.
• The temperature is sense by LM35.
• The set point is adjusted the help of a potentiometer of 100k.
• The system goes to cut off by the help of a relay of 5V.

14. ADVANTAGES:-
As well as when we are designing a new device we are considering its
reduction of size .In a similar manner the main advantage of this device is
its small size.
It is easily portable .It can be used in homes ,offices etc. and can be placed
any where that we like to get more comfort. It can be used while travelling
and all.
The main disadvantage that an air conditioner system creating is that the
usage of refrigerant gases like CFC , hydro-fluorocarbon(HFC) which is
harmful to our environment. But here in this device no such refrigerants
are used . So no pollution is created .
No compressor is used here . So continues servicing is not needed in this
device.
By reducing the area of active to smaller as possible we can reduce the
power consumption.

15. DISADVANTAGES:-
• The main disadvantage that creates is that , for the removal
of heat generated during the working an extra water
cooling system is necessary. If we use this device in a
vehicle, the water cooling system can be replaced by an air
cooler.
• The peltier module cannot run in supply voltage so it need
an additional power supply unit. This can be avoided by
connecting number of peltier module in series connection,
to work it in the normal supply voltage.

16. Cost:- Components Quantity Price
Peltier module 4 1200
Fan 1 50
Transformer 1 2300
Heat sink 2 40
Pump 1 500
Diode 8 40
capacitor 4 200
Temperature sensor 1 75
Water tube 3.3m 28
Relay 1 50
5k pot 2 20
Breadboard 1 70
Blower 1 250
Plastic box 1 20
GI wire 6
Glue 2 37
555 1 10
Heat exchanger 1 400
insulation tape 1 12
copper wire 4m 44
Total 5302

17. Thank you