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Peltier cell help

  1. Apr 3, 2007 #1
    A while back, I purchased a 38W peltier cell on ebay. It wasn't powerful enough, so I'm looking at something along the lines of a 92W. I noticed, however that my 38W and the 92W have the same dimensions and the same number of junctions. Also, dT of the 92W is only 1 degree C above the 38W.

    How is this possible?
    Are the sellers providing false information?
    Is one made out of a material with a higher Seebeck coefficient?
    If so, will one be more efficient than the other?

    Also, a general explanation as to how the different factors effect a cell would be greatly appreciated.
     
  2. jcsd
  3. Apr 16, 2007 #2
    I remember reading that there is some falloff of efficiency with size and that using multiple cells is a better way to go.
    I got my first chip on a 80286 processor cooler (6 mhz:bugeye: ) and been playing with them ever since. I heard that the 08 Chrysler Sebring is coming out with heated and cooled cup holders...I can bet how they're going to do that.
     
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