Thermoelectric Question

[matthewgill]

Just a quick question:

It is the seebeck effect whereby a directly proportional voltage to the temperature dif is produced. I am wondering whether adding more junctions in that style would produce more electricity.

Would this....
http://img156.imageshack.us/img156/3140/54089643.jpg [Broken]
produce 3 (three) times more electricity than this...
http://img519.imageshack.us/img519/148/30093508.jpg [Broken]
?

Thank you.

 

[russ_watters]

I'm not seeing the attachments...

 

[matthewgill]

how is that? are they viewable now?

 

[mender]

Adding junctions will only increase the electricity produced if the overall contact resistance goes down. That will increase the amperage but not the voltage. Contact resistance is a significant consideration when designing and producing thermoelectric modules and is typically very, very low so there isn't much to be gained over present art.