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HELP! Peltier to cool experimental transistors

post #1 of 5
Thread Starter 
I'm an undergrad in a university lab on high speed transistors, and one of our grads has been using a 4cm square peltier TEC to keep transistor lasers at 0 celcius while we work with them, but he burned the last TEC. He wants me to find a new setup, but it needs to fit underneath some equipment and I can't insulate it (like you guys are insulating the processors). I think he said it needs to transfer 12 W, but that seems kind of low because you guys are transferring like 350 W...sooo I'm going to get more info on that. I've never worked with Peltiers before, so I need some advice on what to buy/how to assemble.
+Here are my constraints:
-needs to stay at 0 celcius (we have a regulator and the temp sensors, so controlling it is no problem)
-needs to move 12 W (i think!?)
-needs to fit in an area of about 10 cm x 10 cm square by 20 cm tall.
-I would really like for it to be under 50 or at least under 100 dollars.

Right now I don't know (but will add later) :
-exact number for the heat being moved (12 W I think)
-any of the specs on the TEC we blew up

I'll keep looking at everyone else's posts in the TEC section, but if anyone has anything to add/request I would love to hear it.
post #2 of 5
Only moving 12 Watts of Heat is going to be very easy. You will be able to do it with a regular heatsink and fan with a 50 Watt module I am thinking. It will be cheap and very easy to build whilst being small.

You most likely blew the peltier module up by not having it cooled properly so it just over-heated and burnt out.

Welcome to the forum mate enjoy your stay.
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post #3 of 5
Thread Starter 
I need to be sure that this will work...so I'd like to get some room for error.
By the stuff I've found online, I should be able to keep the hot side at 45-50 degrees MAX. Will a heatsink/fan combo be able to keep the hot side temperature below 40?
post #4 of 5
You should check ferrotecs website. They have a huge selection of TECs.
They should have one for your application.
    
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post #5 of 5
Its hard to get equipment from the ferrotec company, but they offer a large variety of TECs for all applications.

You might also try eBay. They often have TEC auctions.

http://www.ferrotec.com/contact/sales/salesThermal.php
Link to sales + distribution
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