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Calling all HVAC experts to help with a new chilled water project.[Now Window Unit] - Page 5

post #41 of 65
Thread Starter 
Quote:
Originally Posted by utnorris View Post
I did an AC water chiller a few years back, still have it, but stopped using it because it dumped the heat it the room and it was too noisy for my taste. Drewmiester has a whole guide over on extremoverclocking.com on how to build one. He helped me with mine. Cost was pretty low, around $150, but a third of it was the controller which allows me to set the temp and have it cycle the compressor on and off based on temps. The biggest issues I have with AC conversions is that the evap is copper and aluminum fins, so you have to use some sort of anti corrosive additive to prevent corrosion and it can be harsh on some pumps and blocks. Never had an issue, but it's something to consider. Here is link to my build if you need some ideas:

http://forums.extremeoverclocking.co...light=utnorris

I learned a lot from the project and i will probably do a new one soon. I have a phase unit sitting here that I am thinking of cutting the head off and attaching a copper coil to it for the evap. It has a much quieter compressor than my chiller does.
I see you say it took around 30 minutes to get the water to reach only 38f. That's quite a bit of time, how many BTU's? Ah nevermind, it says 5,000 right there in the first sentence. But that's still a lot? Was there something wrong?

Vega, which inspired me to do this, destroyed the heat.

Quote:
Originally Posted by CallsignVega View Post
First test of the cooling unit. It drew down the coolant from room temperature of 68F to 38F (no load, only pump operating) in just two minutes! Although my testing had to stop there as I found a small leak in the tank. I am going to patch it up and test some more tomorrow.
I mean he does have a 15,000 BTU unit but still!
Edited by Khaotik55 - 5/23/11 at 9:16pm
post #42 of 65
If I remember correctly, that was with the water just sitting there not circulating. Normally, it would get down in the teens (Celsius) in a few minutes from ambient when I turned the computer on. It would cycle on and off every 15 minutes or so while surfing the internet and roughly every 8 minutes while gaming. It would turn on for about 3 minutes until it dropped back down to the set temp I had designated and would cycle back on once it was 3 degrees warmer than that. Since it was not tuned, it would only get down to about -12c with an idle load on it and around 0c with a load, but I always ran it slightly above dew point to prevent condensation which in my house with the AC running was around 10c.
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post #43 of 65
Thread Starter 
Quote:
Originally Posted by utnorris View Post
Since it was not tuned, it would only get down to about -12c with an idle load on it and around 0c with a load.
Are those the temperatures of the processor or the fluid circulating through your loop.
(I'm assuming fluid, lol.)
If the fluid is 0c what was your processor temp? 10-30c?

I'm trying to get an idea of what to expect.
post #44 of 65
Drinking fountain works great as well!!!

My chiller project I did back in 2007. I found an old drinking fountain at my work and "dressed" it up a little. It ran for almost 6 months around 2c to 10c 24/7 until the humidity in Phoenix got intense and I came home one day to a sweaty computer. Dried everything out and fired back up just fine. Never got around to condensation proofing it. Now it sits in my corner. Some day... some day...


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post #45 of 65
Yeah, that was the fluid temps. I forget what my cpu was at, it was a QX9650, so it was a hot little bugger. My whole point was to have a quieter, more controlled system than just water cooling, plus I wanted to learn something. It was dead quiet when not cycling and not bad, but louder than my water cooling at the time, plus it took up a lot of room.

A lot of folks use drinking fountains, the compressors are better in them than AC units. AC units use rotaries versus the egg shaped ones you have in the drinking fountain, which are quieter.
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post #46 of 65
Quote:
Originally Posted by utnorris View Post
A lot of folks use drinking fountains, the compressors are better in them than AC units. AC units use rotaries versus the egg shaped ones you have in the drinking fountain, which are quieter.
Drinking fountains also come with a small water chiller coil instead of an air exchange coil, so start off a bit more optimized for the task.
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post #47 of 65
Yeah, I tried to find one when I was doing mine, but the ones I did find were way too expensive for the project. If you can find one I would use that instead of an AC unit.
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post #48 of 65
Thread Starter 
After 3+ hours of scoring 2 sheets of plexiglass to make my breaks (PITA), I've finished the panels and am now gluing them.

Doesn't look the best but hey, what can you do without a saw or c-clamps!

post #49 of 65
If you do it right you will not need the silicone sealer. The glue should fuse the edges together. That being said, some sealer wouldn't be a bad idea, just make sure it is rated for the cold. I always noticed mine would be come hard, almost brittle, plus you have to worry about it contracting and expanding.
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post #50 of 65
Thread Starter 
Quote:
Originally Posted by utnorris View Post
If you do it right you will not need the silicone sealer. The glue should fuse the edges together. That being said, some sealer wouldn't be a bad idea, just make sure it is rated for the cold. I always noticed mine would be come hard, almost brittle, plus you have to worry about it contracting and expanding.
I'm assuming you know that is Gorilla Glue.

By the way I might have to use the silicone because when I broke these plexiglass pieces, they all didn't break 100% even and I have some uneven edges coming in contact with each other and I will most likely need a filler. No big deal with the waiting time because I don't even have my dragon skin or block yet. Going out tomorrow to pick up insulation, tubing, and dielectric grease.

Also I will have to cut the lines on the window unit and reroute them over the top of my box because I don't feel like cutting notches into this hell of a material(plexiglass) and filling it with something. (This will also require a re-charge of r22.)

Edit: Finished mah' box.

I had to use my right side piece that I made from scrap plexiglass yesterday because I ran out. Looks like crap, but like I said before, if I wanted this to look amazing I wouldn't be installing a window unit in my window!


Edited by Khaotik55 - 5/27/11 at 12:07am
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