How to make a Liquid nitrogen generator
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- เผยแพร่เมื่อ 23 ส.ค. 2024
- Full plans at www.homemadeliq... DIY homemade liquid nitrogen generator using JT effect made simple. Nitrogen source: PSA. Output 350 cc/hr. Cool-down to -320F in 50 minutes (470 degree drop).
Have you read the book: Liquid air, oxygen, nitrogen by Georges Claude? Part II The Commercial Liquefaction of Air Chapter is really interesting. The Siemens cooling(dense air) cycle patented by W. Siemens 1857 and the Claude cycle in 1902 using the same process.
Hampson-Linde cycle (Joule Thomson Effect) in 1895, showing that making liquid air is hard to do. It was also interesting read what Georges Claude and Carl von Linde had to say about the technical problems they and others were having in producing large or any amount of liquid air. The Siemens counterflow (regenerative) heat exchanger was a good stating point but they still a long way to go to reach their goal liquefy a whole lot of gas !
All that work just to confuse the cramp out of your cat... hmmm.
worth it!
PSA = pressure swing adsorption. This is a method of gas separation using molecular sieve/zeolites.
Best part... The cat... I thought it was going to drink the liquid nitrogen!! Seriously, great project and demo.
LMAO as soon as I saw the cat, I was thinking this is gonna be awesome if he nukes the cat with LN2.
Just for a second, I thought he was going to freeze the cat and shatter it into a million pieces, - which would have been wrong...
Wrong,but I bet we'd ALL watch it anyway,lol
Jasper isn't caring about you. He's probably high from laughing gas.
Awesome!
I'm reminded of Doc Brown in 1885 with his huge clanking ice cube machine.
Except he built the compressor too and used hay instead of the insulation fiber 😂
4:16 - Evidence of master class in elemental understanding and engineering.
I like how you terrorized Jasper without warning.
I thought Jasper was going to get popsicled there for a sec.
That Cat gets me every time
Excellent work! The cat's expression was PRICELESS! You could literally read the surprise, the hissing, the cold but no smell! Gave me a good laugh! On a more serious note, what did your rig cost to assemble?
If you go to homemadeliquidnitrogen.com I think I go over the items and prices.
In a 10,000 psi carbon fiber composite air pressure tank, the liquid nitrogen or "frozen air" basically, can provide fast recharge time for air motor drive systems for surface and VTOL vehicles.
i love the curious cat.... your generator is so cool, literally! :)
Very neat! Is PSA a commercial nitrogen supplier? Air would be disastrous because of the liquid oxygen, maybe?
I remember reading a book about the liquifaction of gases and the quest for absolute zero. One of the things that inspired me to become a chemist. Great work. Excellent balance between showing the details and reminding people that science is fun, but mother nature bites if you don't respect her.
what is the energy consuption per unit of liquid produced?
You should have given your cat some catnip to go along with its nitrogen narcosis.
Nice
The cat: *looking at him* This guy's up to something
*Looking down as he pours* Dang I knew it! *Runs away*
*Returns* Okay the magic cloud is gone, I'll just sit back at my warm spot... WTF? 🥶
Would substituting the Zeolite sieve with CMS (Activated Carbon Molecular Sieve) material produce a substantial difference in the nitrogen production yield?
Man I feel old reminiscing when Tiesto released this track. Have fond memories of it dropping at Electric Zoo on Randall's Island NYC, sometime in the early 2010's.
No. Zeolite is to remove water and carbon dioxide, which will clog your valves when it solidifies in the tubing.
Where did you get the CMS on sale?
How are you getting 2900+ psi out of your compressor?
That was cool . I have some questions about this machine:
How much power about this compressor;
How many airs pass the compressor per second;
I want to build a high pressure compressor about 40Mpa ~6000Psi .Can you give me some advice? thank you very much!
Keep in mind : Nitrogen can kill you in closed space by replacing the Dy-oxygen you need to breathe
Well, it seems to me that a title like "how to snap together already made hardware to cool some air" is a more accurate title.
I plan to reproduce your project, but i would like to build that in a ratio size of 1/10 approx. And it's because i need to realise this project at lower cost. Also because i dont have place to store that at this size. Also because i just want produce what i need, when i need and i dont need each day. And i just want produce something like 1L max for my purpose at a time, then not need more than that. Like that, i ask myself if i can use fridge compressor maybe with 23L water bottle and ceramic isolation. And regardless of the pressure absorber, i thinking to use 2 tanks of air compressor (3~4 L somethinh like that)..... Anyway, you see the idea, then did you believe that can be possible to realise that, with a better effiency/safety/storeless/costless.... Then did you also believe that could be a good idea, or you think i'm crazy and it's really not a good idea !!! ????
A few suggestions,use copper vs SS tubing for the high pressure/inner
tube of the regenerative heat exchanger to increase the heat transfer
efficiency, stainless steel is about the worst conductor of all metals.
Type K Copper has a tensile yield of about 40KSI so 1/4" copper tubing
from the hardware store can handle 3000 psi with a 3x safety factor.
Also decrease the spacing between the inner/outer tubes to increase
velocity and hence heat transfer. You can shorten your heat exchangers
considerably by these changes and increase yield . Example - Pattern the
re-generator after a regenerative cooling jacket around a liquid rocket
engine where the coolant(fuel) runs at high velocity thru a 'tight'
cooling channel. Another thought is once you characterize your throttle
valve area then replace it with a fixed diameter orifice,less thermal
mass/inertia and like a rocket nozzle there's a contraction area ratio
where sonic flow is achieved, about 4/1, maybe about 1/16". try putting
the throttle valve on the inlet side of the regenerator to control
pressure entering the orifice, called stagnation pressure. Now I'm going
to build one, problem is the high cost of a scuba(n
Correction - 1/160" not 1/16". BTW, your sensitivity in adjusting your needle valve maybe due to it being too large, try a micrometer needle valve, as you can see a 1/160" orifice is 0.006" i.e. very tiny.
Im thinking of getting a 450$ scuba compressor and do the liquid air, next lett it simmer first and that nitrogen, more simmering and pure o2! no rat turd looking PSA carbon required, fractional distillation look like fun!
@@jlo13800 I had the same thought for my project. Have you started on your side?
Same, I'd like to set this up for my students. Teaming our efforts together and sharing our progress could help I guess, if you're into it.
Really elaborate method to scare a cat ;)
I truly love this .But I want some more explanations.I really inspired.Please post another video about this.👍👌👍👌
Just watched your video, again. Have you redone some of the graphics? It really is first rate. Couple comments/questions. First, you seem to be drying the incoming air rather than the high pressure outlet gas. Makes sense but I wonder what the pro/con issues are. Second question relates to your comment I think you made regarding cooling after the first stage. Did you actually modify the multistage compressor so that the second stage is charged with lower temperature compressed nitrogen? I had thought you might be just pre cooling the HPA discharge prior to entering the regenerative cooling coil.
Finally, are those corrugated plastic tubes repurposed Bain Circuits from the OR? :)
Thanks again for a great video.
Doug
Not sure if your still commenting on this video but absolutely brilliant job.
Can you please expand on the idea of recycling the expanded air back to the compressor . It would seem to me that any air coming from the compressor would be chilled or heated to 0c in the ice bucket. So even if the air from the regenerative tower was coming back to the compressor below 0c would be raised back to 0c?
Did you redo this video? I saw it earlier or another one just like it, this was more complete. I would like to build one also, but a smaller form factor. I have read about using a turbine as expander and would like to try doing that for more efficiency. I know for RO water, the pumps that take the waste water pressure to help compress incoming water use half as much energy, and so I'm thinking this might be true if using a turbine expander. How small of a turbine is needed? The math looks hard!! I have a very tiny turbocharger, maybe use its wheels? The tech paper I read said you need much lower pressure with a turbine, so that expensive 3000psi is not needed?
Anything that cools the tubing will speed up the process. Right now I have the first stage off of the compressor go through coils/fins in an ice bath. If you want to cool below 0C with a refrigerator compressor that will work, too. Remember, this will only speed up the cool-down, which only takes 45-60 minutes for me. Your money is better spent on a high-volume compressor so you get a higher yield per hour once you have reached the target temperature.
imsmoother please send me ahmad5dona@gmail.com
How much pressure is in the dewar flask after expanding die nitrogen?
is it possible to produce liquid oxigen if you connect this to a water electrolysis machine?
@imsmoother At a shop I used to work at,we soaked stainless tubing in a cooler of liquid nitrogen to soften it before bending.I have a project that I'd like to do the same.How expensive is this setup to replicate?Would your other video on regen cooling be cheaper even though the yield appears to be less?Thank You for posting
By the by - I've seen cryogenic systems used for weed control (around 1 l LN/sqm). Have you had any experience with this? (Ref. 'Evaluation of a Cryogenic Sprayer Using Liquid Nitrogen and a Ballasted Roller for Weed Control', M. Cutulle et al. 9 October 2012, ASTM.)
Or....
How to (not) flash-freeze your cat.
Hello,
How many kWh per liter of ln2 does this setup consume ?
Also I have a 65 CFM @ 1000 PSI compressor, would this pressure be high enough or do I need 2500/3500 psi ?
thanks !
shodanxx you can make air liquefier using AC compressors. At 2KW power from mains it produces nearly 2.2Liter liquid air per hour. I can help you build one if you want!
Dollar Projects I would love to build one, how does it work?
@@Exotic_Chem_Lab Please help me to do this.
All that effort and you missed the cat?
First of all: Well done!
But 1mm wall tubing seems way to less for almost 250bar. Am I just wrong or did I understand something wrong?
Ok, Inventor calculated a factor of safety from about 2.6, should be fine. I just underestimated steel :)
you did: 304 steel = 1.4301 EN number ; 1/4" = 6.35mm ; 0.035" = 0.9mm ; Use this: w w w . ehm-edelstahl.de/pressure.asp and you get ~360bar
this project helps me to create liquid oxygen
For your expansion valve, did you use a 303 stainless Generant needle valve (GE3000-4-SS) with a metal stem option or the default Kel-F stem? I'm just worried that the GE3000-4-SS with a Kel-F stem will fail at LN temperatures because the low-pressure side of my cycle isn't designed to take a sudden wave of pressure. Manufacture specs list operation temps only down to -54 C for the default Kel-F stem. I'm referencing the manufacturer specs at www.modernfluidpowerinc.com/wp-content/uploads/generant-3000-needle-valve.pdf.
Just the GE3000-4-SS. I've never seen the Key-F stem
Okay thanks, I'll stick to the default options. Thanks for the great content btw!
Very good!
you got rid of the oxygen?
Can you service a liquid nitrogen generator elan 2 for me
what did you use at 0:50 to make a spiral?
The cat thought like WTF
Way to go man!
Hello! Can you do this for sales? I want to order .
well done!
I made a cryogenic thermometer that is accurate to 0.1F/0.1C. It is calibrated using LN2! Check it out here:
CryBaby cryogenic LCD digital thermometer
imsmoother my friend has made a LNG liquefier using 3 ac compressors. He's using small JT hx that fits inside a 1 liter glass thermos. At 2KW power draw, his machine produces 2.2 liter of LNG. He also liquefied nitrogen at nearly same rate. It takes ten minutes to get down to - 196 C.
I'm also building one for liquefaction of air using fridge compressor.
Can I use a refrigerator compressor
yes, but it will take a long time to cool down. you will also need excellent thermal insulation or else the compressor will not be able to overcome the small amount of heat loss back into the reservior.
imsmoother Might it be possible to actively cool the pressure tubes with an other
fridge compressor with refrigerant to speed up the process?
Nitrogen asphyxiation is a real thing.
Jasper is cool
Where do you get the CMS pellets for your nitrogen separator?
I found a source on Alibaba in China and had it shipped directly to me. The cost of the pellets plus shipping was less than buying it in the USA. If you can find several people that want it you can drastically reduce your costs.
@@imsmoother, according to your nitrogen generator tutorial, 4-angstrom pores are used in the CMS. Does that mean "4A" molecular sieves could be used? I see quite a few different options for those on Amazon coming in a tan-colored spherical bead form
Great!
So are you selling these yet for $150? lol. I need one so I can use it to separate LCD assemblies on phones
thanks for the cat
You mentioned you’d be selling these... are you?
He is only selling thermometer
what psi is your pump
BiboyRobs123....... 3500psi
SUPER. I live in Ukraine, but I no have compressor to 3500psi.
First Boy you can use Air conditioning compressor or fridge compressor
you PV=nRT ! Pump it!~
an easier solution would be just purchase liquid nitrogen for only few dollars a liter.
very interesting, tell me cuantote entire system cost? ... and as you can do to produce liquid nitrogen 1000cc time? ... would be interesting to implement artificial insemination in livestock farms if the price is cheap
Luis Tristán you can make one at home for less than $500. It will produce 2 liter per hour
@@Exotic_Chem_LabI am genuinely curious, what compressors do you use? BTW cool channel
@@christophegroulx8187 18000btu/hr rotary compressor
Dollar Projects Your production rate is over 6 times more than the one in the video! Could you please share more details about yours?
@@christophegroulx8187my brother has a TH-cam channel on it.
th-cam.com/video/BjQoJujxMcU/w-d-xo.html
My machine is exact copy of this machine.
your email pls