Just by a quick glance... is that subcooling at work?
I tried that with my direct die but only dropped 3C with a hell of a lot of work. Ran the capillary within the return line.
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Just by a quick glance... is that subcooling at work?
I tried that with my direct die but only dropped 3C with a hell of a lot of work. Ran the capillary within the return line.
$4.50 per liter and twice as cold...
Albeit a bit more tedious to bench with...
Liquid Nitrogen
C
is it even worth the cost to bench with ln2?
how fast does ln2 evaporate? like, in the 7-15 minutes it takes me to bench on air (including cool down times), how many liters of ln2 would be gone?
Reminds me of a couple of cars I've had...LOLQuote:
Originally posted by FUGGER
We didnt put enough gas in. estimated charge of 8~10 oz. I have 2x to 3x internal volume now
180psi in the system at ambient, I let first stage run for about 1 minute before I turn on second stage for minimal head pressure.
With my valve opened more than 50% I can slam to near max temp in less than 60 seconds on second stage. So total fire up time is about 3 minutes.
My mach1 can turn on @ 4Ghz without any cooldown time. It never reaches +32c on the display before it nose dives towards error mode at -53c
I have a hand valve to adjust temps accuratly on the fly. I can run at 10 psi and have unreal capacity and get too much cooling back to the compressor and I can pull into a vacuum and still have unreal capacity but the compressor will warm up to about 115F. My valve responds to load and whatever temp I set it at it will stay. I have about 2 degree temp variation with HT disabled when I run benches at full speed.
Yes and no There will be two refrigerants in this R134a and R23Quote:
Originally posted by Hallowed
Just by a quick glance... is that subcooling at work?
The R134a will evaporate and condense the R23.
I'm sorry! I don't want to go back a read the entire thread...I on slow dial-up!Quote:
Originally posted by chilly1
We shall see, getting it to be stable is going to be the challenge.
Parts and labor to build is around 700-800... we shall see how well it works......
Is this a dual evap??...the size of a prommie? If so.....you're going to get a PM from me! :D
Just out of curiosity, what kind of compressor would be required to recompress LN2?
Well,Quote:
Originally posted by pik-ard v1.1
is it even worth the cost to bench with ln2?
how fast does ln2 evaporate? like, in the 7-15 minutes it takes me to bench on air (including cool down times), how many liters of ln2 would be gone?
10 liters on LN2 is enough to make a NUMBER of full 3D runs, and if anyone thinks these 110% cascade units are for 24/7/365 use...I've got a bridge to sell ya...
C
Hmmm....the size of a diesel locomotive??Quote:
Originally posted by STEvil
Just out of curiosity, what kind of compressor would be required to recompress LN2?
C
They're not......but I believe it's possible that they could be made to run 24/7 with a lot of work (and $ :( )Quote:
if anyone thinks these 110% cascade units are for 24/7/365 use...I've got a bridge to sell ya...
Right now, the -100C 24/7 Cascade is a dream. Just a few observations:
1) Even with Dry Ice, SOOO much coldness (is that a word?) is transmitted throught the PCB of the motherboard, that the entire board will begin to sweat.
2) Running the current Cascades in your office would be kinda' like sitting next to an idling Harley Davidson.
3) Size... 'nuff said.
4) Why?
I guess what I'm saying is... this Cascade madness is just "freezer racing". LN2 is colder than phase change will EVER be, possibly even TOO cold, like Macci says. So to me...LN2 and Super Cascades are in the same class, SUPER Xtreme OC'ing. The main advantage of phase change is the time to bench and the ability to concentrate on tweaks and benching. Transferring LN2 from a dewar to a double cup of top ramen noodles and then pouring that into a LN2 container WHILE watching temps sux. But a $3000 Cascade... 'dunno about that. That would get me 500 liters of LN2 and pay an asssistant $10/hr to fill my container for 100 hours.
C
"if anyone thinks these 110% cascade units are for 24/7/365 use...I've got a bridge to sell ya..."
I personally don't want my bench rig used 24/7 or by anyone else...It's mine! I alone will dorke it... :D
Maybe that's why..I'm typing on a PII 450 atm! :p:
well hate to tell ya ... we ran Fuggers rig will run 24/7 for five days at comdex with out a hitch....
My 404 mach1 runs 24/7 at -44c loaded. I never would have thought that possible just a few months ago. Sooner or later someone will build a cascade for everyday use. Probably someone from here too. I'd say there's still a ways to go yet, but some of these guys have made some impressive rigs lately and they are just going to improve over time. They are getting colder and smaller all the time. I'd love to see it happen :D
sum it up in 3 words...
electric bill
wheres the 3rd? :confused:Quote:
Originally posted by FUGGER
sum it up in 3 words...
electric bill
thats going in my sig for all to see. :D
Fugger how is your electric bill since the 24/7 cascade began its operation.... What is it now -120F loaded thats -84C under load.............. and yes this is for everyday use.... only gotcha is the insulation you need a lot more of it....
Charlie..... I bow to your understanding in these matters :worship: BUT.. you crack me up with this XSplaination :ROTF: That's just such a right on "Look at it" I'm @ a loss for words! ;)Quote:
Originally posted by charlie
Right now, the -100C 24/7 Cascade is a dream. Just a few observations:
1) Even with Dry Ice, SOOO much coldness (is that a word?) is transmitted throught the PCB of the motherboard, that the entire board will begin to sweat.
2) Running the current Cascades in your office would be kinda' like sitting next to an idling Harley Davidson.
3) Size... 'nuff said.
4) Why?
I guess what I'm saying is... this Cascade madness is just "freezer racing". LN2 is colder than phase change will EVER be, possibly even TOO cold, like Macci says. So to me...LN2 and Super Cascades are in the same class, SUPER Xtreme OC'ing. The main advantage of phase change is the time to bench and the ability to concentrate on tweaks and benching. Transferring LN2 from a dewar to a double cup of top ramen noodles and then pouring that into a LN2 container WHILE watching temps sux. But a $3000 Cascade... 'dunno about that. That would get me 500 liters of LN2 and pay an asssistant $10/hr to fill my container for 100 hours.
C
Ed:// speel chker
went up from $120 to $180 last month
I am currently at -81.9c, its running now.
24/7 wouldnt be hard to do.
Just grease the entire board with wheel bearing or greasegun grease, heh.
It's like that ...but , it's worst that that! Even with my little modded system...The Vcard freezes..ok..more foam! Now, I can't read the voltage adjustments...less foam!Quote:
Originally posted by STEvil
24/7 wouldnt be hard to do.
Just grease the entire board with wheel bearing or greasegun grease, heh.
More volts...aaahhh no ice...da*m now I've got condensation into the AGP slot...
Now, it's raining...humidity is 100% ...Geez...there's water every where today....more grease?....more foam? :p:
pack the AGP slot with grease and solder wires to the volt monitoring points.
I think it was Dabit who made an interesting solution to insulation problem by isolating the entire board...either under pressure or in a vaccum..forget which. I would think under pressure would be easier to maintain, but I think he had it in a vaccumn.
The Dude...:) Thank you....I read that thread and actually, I've almost solved the volt/foam/humidity problem...as I have forced myself to finally take notes on the daily project... :)
As MrIcee sez "onward and upward" or somethin like that! :D
Hobocrow, glad to hear you're getting it sorted. It's a good idea he came up with. If you have to have problems, too cold is the one to have. :D
I still think pressure would be much easier to do and keep up. Post it up when you're done, I'd love to see how you worked it out. ;)