Tripple digit cascade

[Charles Wirth]

Building it last week.
http://fugger.netfirms.com/cas1.jpg

Sealed up and turned off (digital meter reads -90c) pressure tested to 2k psi
http://fugger.netfirms.com/cas2.jpg

400w load
http://fugger.netfirms.com/1077c.jpg

#2 already being built.

We skipped the second stage R410 and went straight to the suva-95

I also picked up my cold head on ebay to complete my helium cryo setup.

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2560891724

Cryofridge conversion pictures comming soon.

Americold 1/2HP R410 also comming soon, should be done by friday.

[berkut]

Fugger- what kind of compressors are these, they look like low temp danfoss SCxx

[DaBit]

Wow, great stuff. What did you pay for the SUVA-95? I only heard exorbitant prices on the stuff (>$100/kg)

[bowman1964]

yep great going fugger,now just get it on a chip.

[berkut]

A cpu isnt steel, its silicone that will crack sooner or later :\

[Popcicle]

..... boys in Japan have proven that anything
lower than -120C is futile. But I'd say anything
in that temp rea is Hella cold.

[Ragnarok]

holy §§§§ -107 @ 400W load... now that's some real xtreme stuff there

makes me ashamed of my stock Mach II

*goes off to read more refrigeration books...

[Weapon]

holy h311 -- very nice work.

do you have 40 gallons of conformal coating, 60 lbs of di-electric grease and 6 inch thick neoprene on standby for the upcoming on-CPU test??

[LORD]

Very nice Fugger. I Hope it works out well for you..

[Charles Wirth]

Danfoss SC12MLX w/start and run caps, pictured in the first pic.

I got the bottle of suva for just under $100. that bottle is at 600psi. iirc the PT chart said 550psi at 30c. The compressor can reach ~70c

Yes, its going on a P4 CPU for benchmarking.

Its running right now, we did a few more power failure tests and will be putting a 1200Kva (100 Minute) UPS on the first stage as a failsafe if it loses power durring Comdex. It will cool the second stage to prevent it from blowing a seal or the blow plug.

[Turbo]

Wow -107 @ 400W Nice job Fugger and Reggie. :thumbsup:
Whats the unloaded temps??

[Charles Wirth]

Here is the CPU

[captaincascade]

good job man.

isnt that a little out of that meters acurate range? did you use the jumper in the back so it reads c and not f?

get a better meter. that one only reads k type, and cannot be calibrated. it is only good to -30

http://www.fieldpiece.com/clamp-meter.html

[Charles Wirth]

We did not expect the meter to go past -99

Its not 100% accurate but it is good enough for goverment work.

Its a new probe mounted on the evap

[berkut]

It will cool the second stage to prevent it from blowing a seal or the blow plug.

So when you power down this system you have to let R508 out ?

[Charles Wirth]

If we were to shut off both compressors with the 508B side very hot there is a very high chance it will blow the plug or a seal. Not sure if the shell and tube or the flex line is the weaker point.

R507 compressor is plugged into battery backup and R508B is connected to non-backup power. Both are on the same switch. When power is cut one compressor is made to stay on.

The shell and tube condensor will remain down at -40 ~-50 (max capacity) and keep the 508B compressed long enough for the compressor to cool down to a stable temp.

I will get another pic with the UPS isntalled and the head frozen over. we seperated the hot plate and reconnected the power to the fan seen in pic 2 face up w/blade off. We stole the power for the hot plate to load test.

We never let the 508B out, I only have 4 pounds left.

[captaincascade]

ok, is that f or c?

[Charles Wirth]

Everything done is in C

The only time I use F is for the weather outside

[Turbo]

-107 C = -160 F
-107 F = -77 C

Either way its some serious cooling especially if its under a 400W load

[Charles Wirth]

Even of more interest is the mobo that came with my EE.

EDITED: its a 82875PBZ

just some stuff on it I have never seen before.

mini SO-DIMM slot under the CPU retention

white coil tower at the base of the DDR

jumpers INT1 and INT2 50/60 and bottom 60

[Holst]

pics of the board?

[captaincascade]

b.s.

r-95 wont get that cold, especially not with those little compressors. -95c is about the best you could do. please get a better thermometer.

dont make me build a three stage.

fluke 51's are nice and are like 150$

[bowman1964]

Originally posted by captaincascade
b.s.

r-95 wont get that cold, especially not with those little compressors. -95c is about the best you could do. please get a better thermometer.

dont make me build a three stage.

fluke 51's are nice and are like 150$

you had to go and bust his bubble.....

i wasnt going to say a word...

[isp]

So what's the likely temp ?

[Charles Wirth]

I sense some fear, heh.

The meter is all I got atm that goes past -50c so Ill leave it up to the PT chart -88c boiling at approx ~5 inches of vacuum.

Ill conveniantly blame it on a bad algorythm after -30c so being off 10 degrees wouldnt surprise me. we were surprised to pass -99c to be honest. Unless I sporing for a new fluke or you let me borrow yours, its all I got.

You didnt bust my bubble, my capacity is insane.

Maybe I should put up a disclaimer of 5% margin of error. Better yet, how about I put up some nice scores and we call it even.

You see what I am running