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Building a Heat Exchanger

post #1 of 13
Thread Starter 
Currently I'm running a open-loop HVC-style evaporative cooler, but I want to set up a closed loop to keep all the junk out of my blocks. Anyone got any good ideas for a heat exchanger? I was thinking about dropping 4ft of 1/2in copper tubing into the res and running the CPU loop through that, but wasn't sure how well it would work. Ideally I'm shooting for less than a 5*F delta between the res and CPU loop.
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post #2 of 13
we you could use a plate heat exchanger its cheaper than shell and tube and if you want to make it more effective just put more plates on.

The only problem is that you will be using 2 separate cooling loops. It could be very big too.

I only know that they are used in industry so I cant help you buy one. i

I hope I on the rigth path to what you want
post #3 of 13
Thread Starter 
Quote:
Originally Posted by mam72 View Post
we you could use a plate heat exchanger its cheaper than shell and tube and if you want to make it more effective just put more plates on.

The only problem is that you will be using 2 separate cooling loops. It could be very big too.

I only know that they are used in industry so I cant help you buy one. i

I hope I on the rigth path to what you want
Yeah, thats along the lines of what I want, but the ones I found were in the $100+ range. That's why I was looking to build one.
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post #4 of 13
Well you need to think of what fluids do you want to use to cool. water is a good one because it is cheap and isn't toxic.

Next you have the material would you want to uses copper or some other metal? Remamber copper is very expensive.


what type of heat exchanger do you want? shell tube, plate or something else?

I dont know how to make a heat exchanger in real life yet so you can have fun with that . You could contact a heat exchanger manufacturer to make one for you.

Also do you want to cool the computer or do you want extreme performance (better than water cooling)

I can see this being expensive
post #5 of 13
Copper loops would work but will require quite a few loops and add a pressure drop. I would suggest purchasing a 10 plate heat exchanger, running your current pump to it, and purchasing a new pump for your loop. Or simply add an inline filter to your current setup.
post #6 of 13
Quote:
Originally Posted by sks72 View Post
Yeah, thats along the lines of what I want, but the ones I found were in the $100+ range. That's why I was looking to build one.
Koolance has two fairly nice plate heat exchangers: HXO-135 (handling 2.7 kW) for US$ 65 and HXP-193 (handling 4kW) for US$80.

Official Link:http://www.koolance.com/water-coolin...p?cPath=54_119

Check them out to see if they meet your needs.
post #7 of 13
if you are using an open res (capacity?) and want to incorporate a closed CPU loop in it with a copper helix consider your ability to maintain ambient Delta t of your target of 5 degrees, this is dependant on the rapidity in which the water bath can change the temp of the CPU coolant, the flow rate in the loop within a safe Delta P at the loops narrowest point, not only with regard to loop rupture but post narrowing cavitation of gas out of solution. hope this helps
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post #8 of 13
Thread Starter 
Quote:
Originally Posted by windfire View Post
Koolance has two fairly nice plate heat exchangers: HXO-135 (handling 2.7 kW) for US$ 65 and HXP-193 (handling 4kW) for US$80.

Official Link:http://www.koolance.com/water-coolin...p?cPath=54_119

Check them out to see if they meet your needs.
That's exactly what I'm looking for. $65 is a little more than I want to spend on this experiement, but I'll definitely consider it an option.
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post #9 of 13
http://cgi.ebay.com/10-Plate-Brazed-...#ht_3841wt_905
Same thing basically,
As for those heat capacities, please read this...

Quote:
A heat exchanger can move an infinite amount of heat given an infinite delta between the two sides. If that example doesn't help, and I apologize, I mean to say that the so called "4 kilowatts" of load that it can "handle" is simply a measurement taken at a specific difference in temperature between the hot and cold loop. It does not mean it will handle 4 kw in a different temperature or application.
You will not have a very large delta between your loop and the bong loop.
post #10 of 13
Thread Starter 
Quote:
Originally Posted by NoL View Post
,
As for those heat capacities, please read this...


You will not have a very large delta between your loop and the bong loop.
Right, but I'm also only dumping ~150 watts of heat, so that should help keep the tempature difference down.
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