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(OT Maybe?) Peltier
Heya guys I am getting some peltiers to play with, I was reading and it
seems there is a maximum heat difference between the hot to cold side. I was wondering if it is possible without harming the peltier to run it without a heatsink so it doesn't get quite so cold? I want it to get cool just not freezing. Initially I was just going to use a voltage control to the peltier to get it to the temp I want it, but if by not putting a heatsink it operates within a good range I would rather do that. So can it be done? -Chris |
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Chris Stolworthy wrote:
Heya guys I am getting some peltiers to play with, I was reading and it seems there is a maximum heat difference between the hot to cold side. I was wondering if it is possible without harming the peltier to run it without a heatsink so it doesn't get quite so cold? I want it to get cool just not freezing. Initially I was just going to use a voltage control to the peltier to get it to the temp I want it, but if by not putting a heatsink it operates within a good range I would rather do that. So can it be done? Here is a link that might help explain how the Peltiers work... http://www.heatsink-guide.com/peltier.htm As for me, I don't think I'd use Peltier or also not water-cooling in my computer. I'm not very comfortable about either idea. I prefer some good old-fashioned normal case fans put in, in a certain way. A friend told me to put one in front to draw air in and one in back to pull air out. So far it seems to work nicely. Noisy but cooler. |
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On Thu, 8 Jul 2004 17:16:24 -0600, "Chris Stolworthy"
wrote: Heya guys I am getting some peltiers to play with, I was reading and it seems there is a maximum heat difference between the hot to cold side. I was wondering if it is possible without harming the peltier to run it without a heatsink so it doesn't get quite so cold? No. They will melt/fry/etc. I want it to get cool just not freezing. Then lower the input voltage, which will reduce temp difference. Keep in mind that they will not get down to freezing if they can't pump all the heat, that is a max unloaded rating for temp difference. Initially I was just going to use a voltage control to the peltier to get it to the temp I want it, but if by not putting a heatsink it operates within a good range I would rather do that. So can it be done? No, put the best heatsink you can fit, onto it. I suspect you're thinking of freezing as an important temp to avoid but it is not. Important point to avoid is the dew point, which varies based on humidity (and maybe elevation, don't know, am not a meteorologist). Even so, it's not that hard to insulate the base. Also keep in mind that many thermal compounds reach best interface after heating up. For the first few days it could be better to let CPU run at 50-60C, THEN get the peltier running at higher voltage to reduce temp. |
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