Stupid idea??

[vwfix]

has anyone tried using a very powerful TEC and cooling it with dry ice will this produce colder temps then just dry ice on its own?

[Nate P.]

Bump, because I'm wondering too.

[Polizei]

You need to get a TEC that's designed to operate with its hot side at -70c, which are very large TEC in terms of area (like 80x80mm) and cost ($200). Very inefficient too.

NoL told me a couple days ago when we talked about this, that a TEC that could move 250w @ -10c hot side would draw like 580w, meaning the dry ice or LN2 tube would have to be able to handle more than that.

[Sam__]

580W is a lot... im interested as to how much heat DI or LN2 can deal with.

also.. powering 580W would cost a LOT! for the PSU.

[Maenor]

I've never officially done any subzero benching, but I did make a DI/TEC container (for soda actually ) to test if it could get any colder. Unfortunately, the best physical probe I have access to ATM only goes to -50C, which DI + 99% rubbing alcohol reaches easily. However, even after the pelt ($5 eBay special) is cooled down to ~-75C (isopropanol becoming syrupy), it still pulls the same max amps my poor old PSU can give. From what I can tell, it does make the cold plate even colder, but not too noticeably uninsulated. I'll get some pics sometime.