How would you get a pump effect like this? The liquid couldn’t return to a pressurized resivoir. The only way I could see this working is with an asperator. Although you would want an inert gas to drive it, I could imagine an ensuing flamethrower.
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Looking to build one of these for a roto. Anyway, on icmag
at least one person is using this 160$ pump for this:
https://www.amazon.com/CHUGGER-PUMP-CPSS-CI-1-Transferring-Compliant/dp/B01N9HERFS/
https://www.icmag.com/ic/showthread.php?p=8154155
Biggest issue was getting it primed once dry ice was int he liquid sublimating/creating bubbles…
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and depending on the temperature of your application, you may want to take note of:
No budget necessarily. If i could rig up something for under $200, i think would be worth it for short term. But @Soxhlet made a valid point, the chiller will pay for itself pretty quickly. Not having to drive and buy large amounts of dry ice every couple days would be nice also 
Isnt that kinda what they use on some vortex brewers? Pretty sure thats how my grower has his home built one setup. If so i should get his help haha
Check this out perhaps:
Haven’t built mine yet, but I’ve successfully pumped ethanol as cold as I want to using a Finish Thompson centrifugal, magnetic-drive pump made of polypropylene housing and Viton seals.
As for the Chugger pumps, lots of people I speak to recommend them but I bought two a while ago and could not successfully get either to pump ethanol through a 36 ft, 3/8" coil - even with 2.5 gallons of an overhead priming reservoir. Super weak pump for the price if you ask me.
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LN2, Liquid Nitrogen if available in your area should be option to conceder to explore or even Co2.
Mechanical advantage over all electrical do hikeys and potentially failure of a chiller.
Some Swagelok throttle valves, fittings, lines, relief valve…let it flow
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yeah LN2 is something i’m definitely looking into also, i just have no experience using it for cooling. Need to look into how to properly setup, and find out how long a tank would last me and crunch the $$. I’ve just got gallons on gallons of ethanol and iso sitting around that i could use, why a cheap chiller route is burned into my head lol
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@Soxhlet @Bronx120
Been looking at chilling my column using ln2 could either of you elaborate a little more on what exactly is needed to make this work other than the ln2tank. Ty
Read this, it is a good guide. Cryogenic liquids are dangerous, asphyxiation becomes a risk. Good ventilation and ppe must be had. You don’t need a regulator for these tanks. They have a pressure building loop, you shouldn’t need to use it much.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.princetoncryo.com/liquid-nitrogen-supply-storage/pressurized-liquid-cylinders/mve-dura-cyl-cylinders-high-pressure-300-psi&ved=2ahUKEwi91arm0LXaAhULMd8KHbsvAHsQFjABegQIBxAB&usg=AOvVaw1-rc2QzM7pnrz8Q2PSDjIb
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Apply positive pressure to the headspace on a closed vessel. We do it with 55 gallon drums, adapt a prv, a valve to atmosphere, and an air hose quick connect to the small bung hole, drop a threaded dip tube down the large bung hole. Apply pressure and watch the solvent flow. I also use this method to move solvent to and from Extraction vessels @clouds
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That makes sense for moving solvents in drums. Although i was referring to the topic of this thread on diy chillers. How would you get a constant pump like action with compressed air and circulation like a chiller? It would either need to be a pneumatic pump, or a barrel to barrel type system that went back and fourth.
I have read on icmag to get a 50’ 1/2" cooling coil and submerge it in dry ice / iso / ethanol.
You then have a closed system of ethanol within that line, attached to a reservoir and whatever you would like to chill hooked up to a chugger max pump.
I’ve read the chugger max can move a lot of ethanol without a problem and quickly fill and circulate a 6x48" column. I would be sure to keep all lines bigger than 3/8".
I’ve also heard from my local extract shop you can tear apart some portable AC units and rig the radiators (or whatever the fuck they are) into the liquid you have submerged the coil into and have good results.
/ic/showthread.php?t=348686
I’m going to try building one myself in the next month or two. Dry ice has been irritating as fuck, and purchasing a cooler to circulate a 100lb tank, and multiple 6" x 40" sleeves is way beyond my budget. I will submit a build thread here when the time comes.
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It’s going to be hard getting really cold with an ac system. It certainly won’t compair with dry ice. You will need a cascade refrigation system to go that low.
Here is a picture of the two compressors inside a ult-80 my vape mod is next to one for size comparison.
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Jesus. Chilling liquid to those temperates is above my pay grade. I wouldnt mind attemping to tear ac system and see how efficient 12k btu would be. I wonder if there would be a way to complete the build scalably without the need for dry ice
Creating a chiller that would simulate dry ice could not, or would not be practical with a single refrigeration system. The limitation in a refrigeration system is the refrigerant it is filled with. When you need to go really cold it becomes impractical to use one refrigerant to move heat. Systems that go super low have what’s called cascade refrigeration. The limiting factor is refrigerant. It can only operate in a cetain pressure/tempeure range. The cascade system allows both the refrigerants to operate effectively within their limits. For example The first refrigerant handles the system from +25c- -20c and the second works from -10c- -80c. A single stage refrigeration system would have a very high condenser pressure, and the evaporator would certainly freeze and be at a vaccumm. The compressor would not last long.h53011_Freon23_for_vlt (1).pdf (442.1 KB)
Here is some data for a vlt refrigerant, it was run on a Laboratory cascade system.
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The best cheap option is getting 300psi dewars of liquid gas. Co2, n2 are both good options. No pumps required.
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Like these?
How would one use them? I’m new to this.
Like this
So, you’d use the nitrogen to push the etho through the plant material in a vessel, then back into the same vessel it came from? And this chills it down to -50?