here it is: http://www.icecoldcomputing.com/libr...efrigerant.pdfQuote:
Originally Posted by Unknown_road
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here it is: http://www.icecoldcomputing.com/libr...efrigerant.pdfQuote:
Originally Posted by Unknown_road
So yes a better design is possiable how about a phase change system that has 2 capillaries and one suction that gets -75C and has only one coil, an oil seperatror a compressor and a block nothing else? So there is room for a lot of development... It may even be possiable to get the best unit to market, have it developed and have contracts signed and everything.. And xtremesystems is in a good position to do just that so come up with the best design and if it can be marketed I will help....
Agreed. We should start a line of xtremesystems coolers :D , no joke! I think that they would sell well.Quote:
Originally Posted by chilly1
the problem i see, is that the two markets for phase change systems are:
A) all out cold as possible, size is no limit (cascade, triple cascade etc.)
B) an everyday 24/7 phase change cooler, that must fit in a case that can fit nicely with one's existing case. (prommy, vapo, etc.)
i think these autocascades would fall between the two categories, they dont have the power to compete with the temps of true cascades (unless somone here is a genius, and proves me wrong), and they dont fit the size reuirements that average OC enthusiasts looking for a prommy sized thing would buy.
The idea behind the restrictions is not intended to hinder developement. The restrictions on the gases is suggested because alot of the people that frequent this forum and that might want to participate in this friendly competition don't have access to alot of the specialty gases. berkut was trying to choose refrigerants that most everyone on the forum could get.Quote:
Originally Posted by froudeg
What refrigerants in particular are you wanting to us in your AutoCascade? Maybe we can set up an open class for the guys who want to make the sky the limit if there is an interest. :D
I'd love to join, in any case, to build an autocas, but for the moment I'm depleted of funds and am saving for 3rd stage stuff. I'll try to sell a single stage to get some money...
But I was hoping to use R1150 since I already have a tonne of it.
"Open Class" :D Cool :cool:Quote:
But I was hoping to use R1150 since I already have a tonne of it.
Aye, if i have a go at this i'd probably end up using ethane (R170) in there as this is a gas i already have, plus is half the pressure of ethylene.
Autocascade freezers used in medical systems can achieve below -100C, but they have a low capacity and a finely tuned blend of gases.
As for gas, I will be using CO2 because it's the only gas I would be willing to work with (it's non combustable and easy to obtain). I can get a tank from my local AirLiquide or get a little tank from a paintball shop and fashion an adapter (if it's pure eneough?).
I think that it is possible to get an autocascade to work well, but it will require significant development, refinement, and research. People have been putting all their mental processes into developing better classic cascades but have not considered the autocascade, except for redwolf who build a r414b/co2 autocascade.
Should one static charge an autocascade like a classic cascade? What are the dangers associated with an autocascade system other than high pressure. As I see it, if the compressor on an autocascade system were to fail it would be safer than a classic cascade as the low side would have somewhere to go (eg an expansion tank). What static pressures are we looking at for a 2 stage autocascade?
The dangers of a autocascade are basicly the same as a single stage system : condenser cooling fails and you potentially have a bomb. If the compressor fails there wont be any problems.
Well you can charge a autocascade in any way you want but charging a working system with CO2 is dangerous. The best way would be using a big tank (like a old 10kg tank of R134A), static charging it to lets say 2 bar CO2, then fill her up with your I stage gas to lets say 6 bar. Then fill the system up with it. This way when you are changing something in your system you can repeat the blends and you know when your going the wrong or good way.
I remind you guys: if you want to start in the main contest you have to use CO2. The main purpose of this competition is to make CO2 autocascades more user friendly, so more peapole with skills and materials good enough to make a autocascade can make one.
I have done some research and to my knowlege converting a single stage system to a autocascade would cost about 20-30$ includimg CO2. And how many peapole use high power rotary compressors with a high vacuum ? A lot i belive. Why dont they convert their systems to autocascades ? Beacause they find them hard to do, there is no research on it (they dont want to be the first). A autocascade can give a 10 to 20C boost in temps to my knowlege. This means more benching power and more competition in benchmarks. And if we find a very briliant way of making autocascades, who knows, maybe this will become opium for mases ? No more need to make $$$$ cascades.
This is a lil too optimistic but this is virgin and the perspectives are interesting. I hear a lot about 3 or 4 stage autocascades but i have only seen 4 two stage autocascades. And only 1 was tested with a real load. Guys, lets start building the house, but dont start with the 3, 4 stagers (you dont start to make a house by building the roof), lets make 2 stage systems.
After a CO2 cascade is mastered other refrigerants are only easyer to use.
as far i know of the only ppl to have build fully functional autocascades
are captian cascade,aenigma and redwolf
the only ones on the net are redwolfs and now jsu
thats a good link blinky, printed and reading now :toast:
im sure someone of us (but i cant remember the nickname, he was from the UK) made a R23 autocascade, im sure about that.
afaik cc's cascade didnt work ok
I'm in with sc10b :D .
The fourth person was RusselHQ Berkut.
http://www.xtremesystems.org/forums/...ad.php?t=28785
Regards
John.
I wish I was good enough to build an autocascade. Only just finished my singlestage. Hope to build a few more before I jump into cascade territories.
Yes i had him in mind, thank you. Please start signing up
maybe I'll join the contest but I need some more parts, do you want to close the signing in soon?Quote:
Originally Posted by berkut
We still dont know. So far only a few signed up.
I think that this competition should last at least a few weeks if not longer. Some people dont have as much time free to work on this and it takes a lot more preparation than a single stage, if it's going to be safe and functional.
well im for usre in, I have to make a expansion tank for my auto-c and change some valves a crud and I should be in buisness :)
Yeah i think soo. We should give peapole time, this is not about who makes it the fastest but who makes it best.
I think we should begin within a week (lets say were all doing organization procedures now) and it will last for lets say 4-5 weeks ? Most of us will finish sooner but anyone of us might have some sudden unexpected guests during weekend, holidays, whatever.