Hampson-Linde air liquefier - Beginnings

[@colt4547]

It's amazing how simple the concept is but it certainly seems like it would be very difficult to execute. I'm very interested to see more of this project. Thanks.

[@CharlieSolis]

Excellent experiment! Thanks for sharing!

[@tesla500]

@Aussie50 Thanks! I've wanted to do this for a long time, finally getting around to it.

[@TheRojo387]

Would you believe the efficiency of that machine can be improved?

[@tesla500]

@colt4547 Yes, it's very simple in concept, but I'm sure there are major hurdles to overcome. Getting the air clean and dry enough, and making an expansion valve work at cryogenic temperatures come to mind, but I'm sure there are more.

[@Aussie50]

Thats a really neat concept!, I must try it one day!. I'm way behind on my experiments quota :D

[@1islam1]

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[@73stratocaster]

Use helium as a refrigerant, Through a Hitachi Helium compressor at 340 Psi Supply Pressure, 100 psi return pressure through some phosphor-bronze screen 1st stage and a lead/HoCu2 2nd stage and get 44 Watts @ 40K on the 1st stage and 1 watt @ 4.2K on the 2nd stage. Unloaded, hit bottom of 2.5K. Liquefy anything you desire!

[@androbolaareospace9602]

is there any simplified picture of how it works

[@NOBOX7]

i did not listen to every thing u said in the vid so if u mention your valve posibly being maybe to big then forgive my mention. , the spud of a propane torch might work better, great video by the way , i love this devcie, do you intend to finnish this device?

[@lazaglider]

I will watch this project with interest.

[@imsmoother]

You might want to see this:I've gotten there. liquid nitrogen joule thomson throttle generator

[@petoknm]

im really looking forward to these videos

[@MB031]

Great project.Did you came up with any improvements?Please post another video of your progress.How about if you skip the recuperation and replace it with water loop to take the heat out more efficiently and there will be less pressure required.Air is hard to liquify and may not be practical due to huge energy consuptions.

[@TheCerberusInferno]

I have a question please , does silica glass resist cryogenic temperatures?

[@NOBOX7]

is your condesore getting hot?

[@TheRojo387]

There should be another expansion valve that leads to an evaporator wrapped around the cooling chamber and insulated from the outside. As well, just before the compressor should be a branch to a chimney that encases the radiator after it, with the connection beneath the radiator. Ultimately, the heat exchangers need as much surface area of contact as possible, between the two fluid systems, and minimal surface area of contact with the outside.

[@jlo13800]

Connect 3 450 psi 230v a/c compressors in series for 1350 psi, some stainless tubing and a well insulated bucket and there you go. Feed the cold air back into and let it run like hell and make a racket and maybe make liquid air. Now dump it in a an old freezer to cryogenic stress relieve your favorite steel alloy. have fun. get a cheap scuba compressor for about 450$ if you want.

[@mikethurman9797]

I realize this is way old, but did you ever end up making this work? I've set up a similar scheme where I'm boosting a fridge compressor with an input from a regular shop compressor and getting a pretty steady flow around 600 psi without either compressor overheating, but the oil from the fridge compressor is a huge problem at cryogenic temperatures. Was the filter you got able to handle 500-600 psi? Seems like most coalescing filters on the market are only rated to 150 psi.

[@Exotic_Chem_Lab]

I have built a similar setup for making liquid air. I can help you with oil removal.

[@tesla500]

@bkraz333 Thanks! Does higher pressure equal higher efficiency? If I double the pressure and half the flow, deltaT on both the expansion valve and (possibly?) the recuperator double, which should mean the same efficiency, if I'm thinking right. If so, why is high pressure preferred? Would you have any idea where to find info on recuperator calculations, ie how long does it need to be to get a certain deltaT? I couldn't find your DIY Liquid Nitrogen video, is it still up?

[@NOBOX7]

Velocity, the faster the air acceleration the more heat adsorbed, the use capillary tube instead of valves now days , even in refrigerators , they are super simple to get working

[@NOBOX7]

hey friend as far as i know your machine may work better then it performed in this video, you see you must have your expansion valve adjusted exactly right for the flow rate of your compressore this process is so finiky you may even need a smaller valve also future designs use capilary tubes, the accuracy or percision is very hard to acheive and its best to calibrate it with a gas that liquifies easier then air like r12 or butane if it will liqify butane it will liqify air at that setting

[@stallone745]

Hello Linda explained the process for extraction of oxygen gas possible

[@theycallmeGIORGIO]

do you think one could use this for "cryogenic hardening" stuff? That is, if this system works???

[@DeathBringer769]

Helium can be liquefied only by using the exotic Hampson-Linde cycle..

[@Auttieb]

what multimeter do you use?

[@kingmidas7851]

In theory could you use this to produce liquid helium? if so how would this be accomplished?

[@tesla500]

+KiNg MiDas No, helium is far more difficult. The Joule-Thompson effect produces heating for helium expanding through an orifice, rather than cooling. A system using a turbine or piston expander is required, and getting those to work at cryogenic temperatures is very difficult.

[@kingmidas7851]

hmm okay, any ideas as to how i could get that to work?

[@deltaxcd]

+KiNg MiDas helium temperature is extremely low and I doubt if you can do that in one step easily even to store helium you have to keep thermally insulated container in liquid nitrogen. and even if you manage that there will be unacceptable loss of helium which is expensive unlike air. I think instead of atemt to liquefy helium directly you could try to make Stirling type refrigerator which can be cascaded and thus there are no problems with any temterarures

[@24680kong]

Throttling can only cool a gas if it is below a certain temperature (determined by the type of gas). Nitrogen and oxygen in air can be throttle-cooled from room temperature, but Helium, Neon, and Hydrogen cannot be. Check this out: en.wikipedia.org/wiki/Joule%E2%80%93Thomson_effect

[@deltaxcd]

Joule-Thompson effect ruins everything here. I think simple tesla turbine could improve situation significantly as it could take away energy from the expanding gas

[@24680kong]

Generally, you want as few moving parts at low temperature as possible. Designing and building a turbine that can run at cryogenic temperatures can be difficult. Most metals become brittle and parts shrink, causing undo stress. That's why throttle valves are used for air liquefaction. Turbines are mostly used for liquefying helium in large amounts, just because you can't get a temperature drop with a J-T valve unless it is below ~40K.

[@deltaxcd]

24680kong I am well aware about entitlement but Tesla turbine is pretty simple in design and I think it can withstand those problems. turbines are not only use for helium they are industry standard in modern air liquefaction throttle valves are bad idea, because they do not remove all that energy from the gas which turbine can remove

[@sammyd7857]

Just put the coil in liquid nitrogen and it will blow out liquid

[@berhart]

tesla500 ***** Hey guys! This is an mazing proyect tesla500, I need to produce 10L of liquid oxigen or at least 5l, could you guys help me with the calculations to know sices of tubes and flows? I have a 120psi 80cubic feet per min air supply with laboratory grade air...

[@smoothntallGWM]

See Ben's blog for a good write up, along with many pictures... benkrasnow.blogspot dot com slash diy-liquid-nitrogen-generator