it is a portable refrigerating system

1. Index
 Environmental problems
 Statement of the problem
 Peltier Element
 Block diagram
 Cost Estimation
 Methodology
 Work plan/Activity Time
 Employment opportunities

3. Statement of the problem:
This research is based on the application of conventional air-
conditioning system that used coolant as a medium for cooling
system. Hence, the initiative of this system is focused on replacing
coolant with Peltier module which able to generate hot and cold
system in one device.

4. Research Objectives:
The main objective of this project is to design a Peltier based Cool and Hot system
Specific objectives:
The following are the four major objectives of the study:
1. To design and fabricate a cooler.
2. To design and fabricate Hot section.
3. To design Precise temperature controller.
4. Assembling and testing the whole system.

5. Discovered by Thomas Johann
Seebeck in 1821.
He accidentally found that a voltage
existed between two ends of a metal
bar when a temperature gradient
existed within the bar.

6. A temperature difference causes diffusion of
electrons from the hot side to the cold side of
a conductor.
The motion of electrons creates an electrical
current.
The voltage is proportional to the temperature
difference as governed by:
V=α(Th-Tc)
where α is the Seebeck coefficient of the couple

7. The Peltier effect is named after Jean Charles Peltier
(1785-1845) who first observed it in 1834.
The Peltier effect had no practical use for over 100 years
until dissimilar metal devices were replaced with
semiconductor Peltiers which could produce much larger
thermal gradients.

21. Sl.no Item Quantity Unit
price
Total
price
1. Peltier 12706 6 250 1500
2.
Cooler Master Master bAir MA621P TR4 EDITION 2 3000 6000
3. Cooler Box 1 3000 3000
6. ARDUINO PRO MINI 1 200 200
7. 1 Channel Isolated 5V 10A Relay Module 2 75 150
8. PWM Controller Boar 1 1000 1000
9. Temperature Sensor 1 300 300
10. LCD Display 16 X 4 1 300 300
11. Power Supply SMPS 2 500 1000
12. Arduino Mega 2560 ATmega2560-16AU Board plus USB Cable. 1 2000 2000
Total 20150
Cost Estimation
Item Quantity Unit Price Total Price (birr)
Electronic
consumables
Assorted 1000 1000
Micelleneous
Transport
- - 500
Sub Total 1500
Total: 21650(Twenty one thousand six hundred and fifty birr only)

22.  First step: Collection of all required materials.
 Second step: Design and fabricate cooler.
 Third: Design a controller Printed Circuit
Board (PCB) and component assembling and
testing.

24.  By developing this model, the direct
beneficiaries will be the:
 Hospitals, Universities and Industries of
Ethiopia.

25.  [1] "Thermoelectric cooling," [Online]. Available: www.wikipedia.org.
 [2] "RAC LECTURE 10 PDF," in Version 1, ME, IIT Kharagpur.
 [3] T. J. Seebeck , "Magnetische Polarisation der Metalle und Erze durch Temperatur-
Differenz.
Abh. Akad. Wiss.," pp. 1820–21, 1822, 289–346.
 [4] J. C. A. Peltier, "Nouvelles expériences sur la caloricité des courants électrique Annales de
Chimie et de Physique," vol. 56, pp. 371-386, 1834.
 [5] H. E. Lenz, "Ueber einige Versuche im Gebiete des Galvanismus," St. Pétersb. Acaf. Sci.
Bull, vol. III, pp. 321- 326, 1838.
 [6] E. Altenkirch, "Uber den nutzeffekt der thermosaule physikalische zeitschrift," vol. 10, p.
560, 1909.
 [7] A. F. Loffe, "Semiconductor thermoelements & thermoelectric cooling," Infosearch, 1957.
 [8] H. J. Goldsmid and R. W. Douglas, "The use of semiconductors in thermoelectric
refrogeration," Br. J. Applied physics, vol. 5, no. 11, p. 386, 1954.
 [9] D. M. Rowe and C. M. Bhandari, "Modern Thermoelectrics," Hot Technology, 1983.
 [10] M. K. Rawat, H. Chattopadhyay and S. Neogi, "A review on developments of
thermoelectric refrigeration and air conditioning systems: a novel potential green
refrigeration and air conditioning technology," International Journal of Emerging
Technology and Advanced Engineering, vol. 3, no. 3, pp. 362-367, Feb 2013.