The peltier doesn't eat heat, if you do not cool the hot side, it will continue to heat up until it cooks itself. The delta doesn't mean it will make the cold side a very low temp, the delta is directly related to the temperature on the hot side. If the delta T was 50C and you had the hot side at 100C, the cold side would be 50C. The cold side will not stay at 50C though. The hot side will keep generating heat and get hotter which will make the cold side hotter as well until that heat is removed by use of a heatsink or when the TEC fries itself.
Would keeping the cold side at ambient only allow the hot side to get to 50C, Using a "cold sink" instead of a heat sink?
Oh and to have some actual number, the delta T for the TEC I ordered is 71 degrees. I guess this would get to high if I kept the cold side at ambient (20 degrees). Meaning the hot side would be 91 degrees, which I *think* is too hot?
Plus I obviously would not be able to keep the cold side at ambient, it would be ~5 degrees above, raising the hot side to 96 (near boiling
So I would need to cool the hot side
Edited by postama - 8/5/10 at 10:28am