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I would rather go with piece of captube. It reduces oil migration and it will reduce the shock to the higher stages when you turn the compressor on. When you pump 3 liter of pressurised ethylene into the HX in 1/2 a second the high stage probably gets into trouble. Don't understimate the amount of ethylene in this system.
I never thought about that, I will follow that advice.
I only see 1/4" expantion tubing on the large 30hp chambers. Even the small 7.5hp chambers use a BC4 captube 3ft long.
What is BC4 in mm or in inch?
Quote:
Originally Posted by cold_ice
According to this page BC4 is 0.064" ~ 0.16mm, sounds nice
http://www.minvalco.com/inv/sup.htm
In Canada Yes sadly you doQuote:
Originally Posted by Xenogias
The Gasses we can easily get as Hobbiests and consumers are :
R-290 (Propane)
R-600a (IsoButane)
R-134a (TetraflouroEthan (It is in the air dusters and freeze it spays, usualy 100% pur, it is just a matter of geting it out the can as a solid flow of liquid thats the tricky part))
There are probly some more from welding shops.
BTW awsom unit indeed! add 2 or more stages and make liquid Helium!
I have an air duster with 402a!:D not even gonna bother to try and get it out thoQuote:
Originally Posted by Xeon th MG Pony
Found a big receiver today, it has a volume of 6 litres.
http://www.extremecooling.net/random.../4stage/80.jpg
The black receivers have 1.6 litres
http://www.extremecooling.net/random.../4stage/81.jpg
Can I use a suction accumulator as expansion tank as well? This one has a volume of 2.3 litres.
http://www.extremecooling.net/random.../4stage/82.jpg
I don't know which expanions tank I should use in second/third/fourth stage. Maybe somebody can help me a bit here.
Draining out the old oil of the SC18
http://www.extremecooling.net/random.../4stage/83.jpg
http://www.extremecooling.net/random.../4stage/84.jpg
Today I started with the third stage. I have to wait for the special oil, until a finish this stage.
http://www.extremecooling.net/random.../4stage/85.jpg
http://www.extremecooling.net/random.../4stage/86.jpg
http://www.extremecooling.net/random.../4stage/87.jpg
http://www.extremecooling.net/random.../4stage/88.jpg
http://www.extremecooling.net/random.../4stage/89.jpg
Looking strong :D cant wait to see it all fired up!
looks nice :)
the biggest expansion tank for the second stage, 3rd stage already contains less gas so can be smaller. 4th stage the "smallest".
you can use a suction line accumulator as an expansion tank, why not, the only function of an expansion tank is to create volume.
..................that is freakin' insane............and I like it alot. :D
I had a talk today, he said that the biggest tank is needed for the 4th stage, because methane is a very light gas, and I will need alot of it in the unit.Quote:
Originally Posted by Unknown_road
looking really good
cant wait for it to get done.
what hardware will be frozen?
i hope a 955ES
maybe his P4 661 :)
I think a Yonah. But hardware isn't my main interest anymore. I like building units more than overclocking.
me too,
coz its not really practical to run even a single stage 24/7 coz of noise and electricity bill.
what are the 2 cap-tubes b/w oil sep and condenser for?
These two pipes connect the front-gauge and the pressure switch to the high side.
would it be suitable also connecting a gauge to the low-side. Or is it not of any value and will it only give extra work insulating the pipe towards the gauge?
I think you'll need about twice the volumetric amount of methane as ethylene in a 2 stage. the amount of ethylene in the system depends a bit on how you charge the system I geuss, flooded HX or just enough to hold the load. I think it will be more but we'll see.Quote:
Originally Posted by cold_ice
There is a gauge for the lowside too.Quote:
Originally Posted by GuuZ
prolly have read the topic a zillion times... but haven't found what size tubing you use for that and if the tube is insulated..Quote:
Originally Posted by cold_ice
2mm captube.