Presentation about thermoelectric effect which is easy to understand for communication engineering #aast

1. Thermo Electric Effect
By: Ahmed Diaa El Din

2. What is it ?
The thermoelectric effect is the direct conversion of
temperature differences to electric voltage .
The direction of heat flow can be controlled by
changing polarity of the voltage source.

3. History
In the 1820’s Thomas Seebeck (Germany) discovered
that if two metals at different temperatures were
touching you could create an electric current.
Jean Peltier discovered that the opposite was also
true. By sending a current through two metals you
could create differences in temperature.

4. Seebeck Effect
Discover
Seebak Coefficient : S=-∆V/ ∆T
ΔV is the voltage difference.
ΔT is the temperature difference between the hot and cold sides .
The negative sign comes from the negative charge of the electron.

5. Peltier Effect
Discover
The efficiency by which a material is capable of
generating power (Z)
K thermal Conductivity - σ electrical Conductivity - S seebak coff.

6. Why does this Effect Occur?
Charge Carrier Diffusion and Phonon Drag
Peltier Effect
Seebeck Effect

7. Thermoelectric Module

8. Applications
Thermoelectric generator
Cooling Computers
Drink Coolers
Recharging Devices
Space Probes
Solar Power
Clothing

9. Video

10. References
* G. Jeffrey Snyder and Eric S. Toberer "Complex Thermoelectric Materials" Nature
Materials 7, 105-114 (2008).
* G. Jeffrey Snyder, Tristan Ursell. "Thermoelectric efficiency and compatibility"
Physical Review Letters, Vol 91 p. 148301 (2003)
* CRC Handbook of Thermoelectrics, Introduction, Edited by D.M. Rowe, CRC Press,
1995.
* Rockwood, Alan L. (1984). "Relationship of thermoelectricity to electronic
entropy". Phys. Rev. A 30 (5): 2843–4. Bibcode 1984PhRvA..30.2843R.
doi:10.1103/PhysRevA.30.2843
* http://www.thepowerpot.com/how-thermoelectric-generators-work

11. Thank You
Questions ?