Can Adding More Junctions Increase Thermoelectricity Production?

In summary, the conversation discusses the possibility of increasing electricity production through the Seebeck effect by adding more junctions. However, this would only be effective if the overall contact resistance decreases, which is typically already very low in thermoelectric modules. The provided attachments are not viewable.
  • #1
matthewgill
16
0
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
produce 3 (three) times more electricity than this...
http://img519.imageshack.us/img519/148/30093508.jpg
?

Thank you.
 
Last edited by a moderator:
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  • #2
I'm not seeing the attachments...
 
  • #3
how is that? are they viewable now?
 
  • #4
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.
 

What is thermoelectricity?

Thermoelectricity is the conversion of temperature differences into electricity or vice versa. It is based on the Seebeck effect, where a temperature difference between two dissimilar materials creates a voltage difference.

How does a thermoelectric generator work?

A thermoelectric generator works by utilizing the Seebeck effect. It consists of two dissimilar materials, typically semiconductors, that are connected in a circuit. When there is a difference in temperature between the two materials, a voltage difference is created, generating electricity.

What are the applications of thermoelectricity?

Thermoelectricity has various applications, including power generation in remote locations or space, refrigeration and cooling systems, waste heat recovery, and temperature sensors.

What are the advantages of thermoelectric devices?

Some advantages of thermoelectric devices include their compact size, lack of moving parts, and ability to operate in various environments. They also have a long lifespan and are environmentally friendly as they do not emit any greenhouse gases.

What are the limitations of thermoelectric devices?

One limitation of thermoelectric devices is their low efficiency compared to other forms of power generation. They also have a high cost and are not suitable for high power applications. Additionally, the materials used in thermoelectric devices are limited, and their performance is affected by temperature fluctuations.

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