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Gino Rumhein Abdulrahman Fakhroo Me 304 12/12/12. The Importance Of thermoelectricity. What is Thermoelectricity?. T he direct conversion of temperature differences to electric voltage and vice versa

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The Importance Of thermoelectricity

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#### Presentation Transcript

Gino Rumhein

Abdulrahman Fakhroo

Me 304

12/12/12

## The Importance Of thermoelectricity

### What is Thermoelectricity?

The direct conversion of temperature differences to electric voltage and vice versa

Encompasses three separately identified effects: The Seebeck effect, the Peltiereffect and the Thomson effect.

### Why Turn to thermoelectricity?

Approximately 90% of the world’s energy is generated by heat energy

Most of it is wasted

15 terawatts of power are lost annually to the environment

### Why isn’t it being used?

Difficult to achieve high temperature gradient

Metals that conduct heat usually also conduct electricity

Thermoelectric materials not as efficient as could be

### The Seebeck Effect

Linear Relationship between Seebeck coefficient and temperature:

### Bismuth Telluride

Agray powder that is a compound of Bismuth and Tellurium

Used Frequently for thermodynamic applications

Seebeck Coefficient=

2x10^4

### Our Experiment

Wrap a truck’s exhaust pipe with a thermoelectric generator

Average temperature of a truck’s exhaust pipe is 260 C (530 K)

Average exhaust pipe

radius was found to

be 0.0508 m

### Conclusion

Potential to generate significant amount of voltage (180 V)

IMPORTANT: IDEAL CASE ASSUMPTION

Thermoelectricity could potentially revolutionize energy consumption

### Questions?

Thank you for watching!