Are you the one that's trying to supercool with dessicant in a small refrigerator?
You probably won't need a very powerfull Pelt, but you'll have to run the numbers. For air cooling, you generally have to keep it under 80W. Also, note that the Pelt will heat up one side far more efficiently than it will cool the cold side. (i.e. don't expect it to raise temp by 20C on one side, and drop 20C on the other)
Start here:
http://www.tedist.com/technical/inst...ly%20Procedure
then go here:
http://www.tetech.com/design/
and let them spec/size something for you.
(I haven't figured out all those calculations yet, so if you find out anything, let us know!)