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Biggest peltier.

post #1 of 7
2/29/12 at 7:37pm
Thread Starter 
  • Alfaa
  • Graphics Card Aficionado
Lets just say I wanted to cool somthing really fast (like cool it fast not a fast processor thumb.gif) with a REALLY big Peltier device, what should I buy. I'm looking for the biggest, scaryest peltier out there.

Oh, yea, Im not going to be cooling my CPU with this, but I would like some ideas on how to actually power the thing, as a car battery isnt exactly an option.

Also, what sort of heatsink am I going to need to look at for this? something with heatpipes and lots of fins? Im assuming that extruded aluminum stuff that was on my USB beverage cooler won't work with somthing massive.

Thanks!
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post #2 of 7
2/29/12 at 11:02pm
The largest TECs are 62mm and 50mm ones (with Qmax close or over 300W). You can find them on Ebay quite easily. Also check customthermoelectric.com.

It really depends on your application, if you want to cool fast, you may want to use multiple TECs. That way it reduces the power consumption and makes it easier to cool the hot side. For 62mm/50mm peltiers you really need strong cooling (consider 250W-400W if you are running at half of Vmax). For extruded aluminum heatsink you will need a big one with a high speed fan.
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post #3 of 7
3/1/12 at 4:13am
Thread Starter 
  • Alfaa
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I guess multiple smaller ones would be more efficient, too. I never thought of that, actually doh.gif

You know what else I realized? I could get a couple (2) of those big 6v flashlight batteries and use them as a 12. I don't know how much amperage those give you, though. I really need a high amperage bench top power supply, but those are pretty expensive (the high amperage ones are at least).

Thanks, though, +rep
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post #4 of 7
3/1/12 at 8:45am
Quote:
Originally Posted by Alfaa View Post

I guess multiple smaller ones would be more efficient, too. I never thought of that, actually doh.gif
You know what else I realized? I could get a couple (2) of those big 6v flashlight batteries and use them as a 12. I don't know how much amperage those give you, though. I really need a high amperage bench top power supply, but those are pretty expensive (the high amperage ones are at least).
Thanks, though, +rep

TEC's will require a lot more power than batteries will ever be able to put out. My chiller I'm designing will require a 1200Watt PSU using 6 TEC's, not even running them at full capacity.
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post #5 of 7
3/1/12 at 9:15am
Thread Starter 
  • Alfaa
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Quote:
Originally Posted by motorsportcfd View Post

TEC's will require a lot more power than batteries will ever be able to put out. My chiller I'm designing will require a 1200Watt PSU using 6 TEC's, not even running them at full capacity.

I'm on a FIRST robotics team, and every year we get a sealed motorcycle battery to run our robot. It's 12v so that should be able to put out enough amperage. We put a 120amp breaker on it, so I'll just limit it to 120 amps.
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post #6 of 7
3/1/12 at 10:10am
Car/motocycle battery is fine. Someone I know used one to power a TEC. I don't know how long they last for each charge though.
You could also use a spare computer power supply if you have some parts around.
12V power supplies are also cheaply available on Ebay (about $30 for a 300W). Some are adjustable from 8V-14V.
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post #7 of 7
4/3/12 at 9:18am
Could try Lithium-polymer batteries, small- light-good power but not cheap, however power draw from Tec will even drain these quickly. Maybe small wheelchair battery (deep cycle). Good Luck !
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