Peltier elements

sonnichjensen · 2012-09-19T22:11:30+00:00

HiI was playing around with a peltier element I got from a friend, and I did =not get the result I was looking for. I wonder how they make those mobile c=oolers.By applying 12VDC it consumes 2-3A, stabilizing at app 2.4A =3D ~30W.I used to metal plates from a CD player there was around, but that was not =enough to set of the heat - it got quite hot, 90 deg. C, and with a fan som=e 45C. That means, that the "cold" side was still warmer the otherwise insi=de temperature (26C at work, at home 21-22).Running it at 3V/0.5A it works better.As this was a simple test I was not expecting it to work the best, but I am= surprised then instead if getting a cooled part I actually got a heater in= total.I have a few options - running it at lower power, but the main thing would =be to have a larger and more effective part for getting rid of the heat.My idea was to make some kind of small fridge, for the fun of it.What are your experiences with peltier elements?Electronics for controlling it?WBRSonnich

Sep 19, 2012 40 Replies

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Spehro Pefhany 14 years ago

AFAIR, there's some end-of-day cleaning procedure (especially for the bits at room temperature and the steamer bits). I would think the health inspectors would be after them if they didn't have some procedures to keep bacteria at bay.

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