To chill ot NOT to chill...-140C that is.

**charlie** · 10-13-2003, 05:08 PM

So,
I've got the cryo-chiller...
But to make it work I have to charge the system and plumb on some evap's. $1075 per charge. Youuchh. So that's the cost of a Prometeia Mach II, for refrigerant.
Captain Cascade checked out the system...it's ready to roll. So that's the question today, fellow hobbyists...how much is -140C on the evap worth? Some people have talked about how too much cold can be a bad thing for a CPU, I don't understand this, LN2 is much colder....is there such thing as too cold? I think not.

C

**sandman** · 10-13-2003, 05:23 PM

Wow, 1075 is alot of money, but then it's also like what 80C colder than a prommy mach 2?

**eva2000** · 10-13-2003, 05:30 PM

that's alot especially since that's USA dollars

**isp** · 10-13-2003, 06:31 PM

$1075 that's sick!

I hope you go through with it still though, just to see all the results and pics etc

Your money though...

You didn't pay that much for it though right? You said you got it from ebay IIRC?

**Major** · 10-13-2003, 06:48 PM

I'd shop that price out ! I'd say for that much you could get your epa license, buy all the stuff you need to do it, and have a side job reworking promies and vapo's to r404a ! lol

Do it !!! if you have the money !

You can't ever get it too cold, condensation prevention would be the only concern I can think off.

**captaincascade** · 10-13-2003, 06:53 PM

lol, thats his cost direct from the manufacturer. dck

**charlie** · 10-13-2003, 06:54 PM

The problem is that it's a proprietary blend of refrigerants...the exact quantities and ratios is unknown. Cascades are tuned for the boiling points of specific refrigerants....just loading r404a won't work. Luckily I got it off Ebay or $76...
So I guess my total cost with a couple Baker18 evaps would be about ??? $1400 ???
C

**captaincascade** · 10-13-2003, 06:59 PM

its an autocascade, i cant just guess what goes in it, i didnt engineer it. its a wierd little thing.

autocascades take very precise blends of lots of different refrigerants

**Major** · 10-13-2003, 07:04 PM

Man I'd say it would be kick freakin azz !!!!!

For the price of a Mach 2 ?? whats the question again ??

**charlie** · 10-13-2003, 07:11 PM

Originally posted by Major Slaughter
Man I'd say it would be kick freakin azz !!!!!

For the price of a Mach 2 ?? whats the question again ??

Well, yeah

It's a good unit, master wrench Captain Cascade on the job...
I'll have the unit manual on Wed. hopefully it'll explain things a bit more...I'm just curious...at those temps won't the whole motherboard from the ddr slots to the last pci slot just turn into a sheet of ice? How do you ice/water proof something like this??
C

**sandman** · 10-13-2003, 07:33 PM

just die electric grease the whole damn thing.

Or put it all in mineral oil or something non-conductive.

I'd imagine at that temp the traces on the mobo would generate condensation.

**charlie** · 10-13-2003, 08:41 PM

Hmmmmm....like a shallow pan, or tray with dielectric mineral oil, good idea, I like that!
C
here's the msds for "polyCold" proprietary refrigerant

**Ranger2992** · 10-13-2003, 10:41 PM

LOL this is too funny. You're the guy who beat me in the bidding for the cryocooler. I thought I had that thing for sure and I went to bed knowing it was gonna be mine. I wake up in the morning and I got outbid by $1. Oh well I am glad it went to somebody that can try and make it into a supercooler. Good Luck

**charlie** · 10-13-2003, 10:49 PM

Originally posted by Ranger2992
LOL this is too funny. You're the guy who beat me in the bidding for the cryocooler. I thought I had that thing for sure and I went to bed knowing it was gonna be mine. I wake up in the morning and I got outbid by $1. Oh well I am glad it went to somebody that can try and make it into a supercooler. Good Luck

lol...yup I'm the "Sniper"

**Xenogias** · 10-13-2003, 11:17 PM

yeah, you'd have to insulate the §§§§ out of it, and then probably immerse it in some kind of mineral oil, and then maybe even heat the oil in some way so it wont freeze near the evap. It's doable. Can you make it work for your vid card as well?

**xDUCK** · 10-13-2003, 11:35 PM

Originally posted by Ranger2992
LOL this is too funny. You're the guy who beat me in the bidding for the cryocooler. I thought I had that thing for sure and I went to bed knowing it was gonna be mine. I wake up in the morning and I got outbid by $1. Oh well I am glad it went to somebody that can try and make it into a supercooler. Good Luck

Hey there... Funny how many fish are here at XS.

Btw, there's a new 2k1 and 2k3 champ in town.

**DaBit** · 10-14-2003, 12:37 AM

I have written some software which can solve the set of equations needed to give you a basic mixture with just about the right molar fractions of the various components.

I could run this software to give you a basic hydrocarbon mixture consisting of methane, ethane, propane and butane, which should work fine. From there you can experiment. I once ran this software against a mixture with various known molar fractions for a 80K cooler, and results were off by about 15%.

It is the result of my efforts to build an autocascade, but I decided to try regular cascade first, and then autocascade the low stage.

As initial input I need the design low side pressure, design high side pressure and target evaporation temperature.

**Popcicle** · 10-14-2003, 05:08 AM

There ya go.....

**]JR[** · 10-14-2003, 05:53 AM

WRT to condensation take dabits approach, where theres no air theres no moisture, and therefore no condensation.

Build yourself a big box and vacuum the air out of it and put your mobo and gfx inside have everything else outside. Simple.

No messing about for rma's either since theres not 400miles of seal string and a gay parades full of vasaline smeared over everything

]JR[

**DaBit** · 10-14-2003, 06:42 AM

I am extremely happy with my airtight mainboard housing.

**charlie** · 10-14-2003, 07:38 AM

Dabit,
Very nice work. I'd be interested in seeing more info on your airtight mainboard housing!
And as soon as I receive the manual I will send you info about the autocascade spec's for a custom refrigerant blend.
C

**charlie** · 10-14-2003, 07:39 AM

Originally posted by ]JR[

No messing about for rma's either since theres not 400miles of seal string and a gay parades full of vasaline smeared over everything

]JR[ [/B]

LmAO.....

**st0nedpenguin** · 10-14-2003, 07:52 AM

DaBit, thanks for the link to your project, it looks like I have something to get me through my boring lunchbreak at work now.

And charlie, I'll definitely be keeping an eye on this project of yours, do you have any pics of the cryofreezer?

**charlie** · 10-14-2003, 07:55 AM

i don't have a digicam and even if I did, the guts are enclosed in insulating foam...all you can see is the compressor, expansion tanks, condensor and fan!

**DaBit** · 10-14-2003, 08:05 AM

Originally posted by charlie
[B]Dabit,
Very nice work. I'd be interested in seeing more info on your airtight mainboard housing!

Visit my website: http://www.icecoldcomputing.com, and look under the 'old projects' menu item.

BTW: my hosting provider will soon move the site to another server, so you might experience hickups.

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