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The Importance Of thermoelectricity PowerPoint PPT Presentation


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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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Gino rumhein abdulrahman fakhroo me 304 12 12 12

Gino Rumhein

Abdulrahman Fakhroo

Me 304

12/12/12

The Importance Of thermoelectricity


What is 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

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

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

The Seebeck Effect

Linear Relationship between Seebeck coefficient and temperature:


Bismuth telluride

Bismuth Telluride

Agray powder that is a compound of Bismuth and Tellurium

Used Frequently for thermodynamic applications

Seebeck Coefficient=

2x10^4


Our experiment

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

Conclusion

Potential to generate significant amount of voltage (180 V)

IMPORTANT: IDEAL CASE ASSUMPTION

Thermoelectricity could potentially revolutionize energy consumption


Questions

Questions?

Thank you for watching!


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