1. DESIGN AND IMPLEMENTATION OF THERMO-ELECTRIC COOLER IN WATER DISPENSER
TEAM MEMBERS:
P.ABARNA
M.M.MARJANA
P.SHEEBA ANNE
GUIDED BY:
Mr.J.JAYAPRAKASH
AP/ICE

2. ABSTRACT
Every industry runs under thermodynamic process in which heating and cooling is made rapidly in all processes.
In this project heating and cooling is made possible by peltier effect.
Heating and cooling process is achieved by regulating the voltage of the thermoelectric cooler using microcontroller.

3. EXISTING METHOD

4. DISADVANTAGES Installation is difficult.
Heating and cooling in different module.
The dispenser must be dust free otherwise it could possibly become the breeding place of diseases.
User cannot change the temperature of the water because the temperature is fixed.
Need space to store the bottles.

5. PROPOSED METHOD RELAY 1 RELAY 2 LCD DISPLAY PELITER MODULE PIC 161877a
ULN
2803
Increase KEY
Water surface
LM35
SWITCH
Decrease KEY

6. HARDWARE

7. HARDWARE COMPONENTS TRANSFORMERS BRIDGE RECTIFIER, IC REGULATOR & LED
LCD DISPLAY
PIC MICROCONTROLLER
RELAY &RELAY DRIVER
THERMOELECTRIC COOLER

8. HARDWARE DESCRIPTION
THERMO ELECTRIC COOLER: It works on the principles of peltier effect. LM 35: LM 35 is used as a temperature sensor. PIC a: It control the action of thermoelectric cooler. ULN2803: It is used as a relay driver.

9. CIRCUIT DIAGRAM

10. MODEL OF THE SYSTEM

11. PELTIER EFFECT
Peltier effect is a common and most popular effect for heating and cooling.
This effect is similar to seeback effect but it works by inverse seeback effect.
When voltage or emf is given to the module means, then heating and cooling process is achieved on the either sides of the module.

12. THERMOELECTRIC COOLER SPECIFICATION

13. SOFTWARE

14. HEATING NO
YES

15. COOLING NO
YES

16. OUTPUT MODE OF WATER TEMPERATURE HOT WATER 40 C -60 C NORMAL WATER
COLD WATER
10 C- 25 C

17. ADVANTAGES OF THE PROJECT
Hot, normal and cold water in a single outlet.
They do not require plumbing
High efficiency and high accuracy.
Highly portable.
Installation is easy.
User can change the temperature for their purpose.

18. CONCULSION
Thus the overall demand for heating and cooling is reduced by using a single module namely thermoelectric cooler using peltier effect with high efficiency.
The controller used in the system is also highly efficient one to control the process.

19. FUTURE ENHANCEMENT
This project meant for heating and cooling, in future this thermoelectric module is simply placed in the wall of the room for the purpose of Air Conditioning.
By using the thermoelectric module which works on peltier effect, electricity is also generated from the module with high efficiency.

20. REFERENCES
Rowe D M (1995), “Thermoelectric”, CRC Handbook, Vol. 2, pp
Zhang H Y (2010), “A General Approach in Evaluating and Optimizing Thermoelectric Coolers”, International Journal of Refrigeration, Vol. 33, No. 10, pp
Astrain D and Vian J G (2005),“Computational Model for Refrigerators Based on Peltier Effect Application", Applied Thermal Engineering, Vol. 25,No. 13, pp

22. QUERIES