At lest 30k

Try 70k

@@FRANKI18136nowhere near 30k, it’s wayyy more than

nah, helium is super abundant, shortage is because its made from oil, its basically waste.

​@@monad_tcp are you thinking of something else? You can't really manufacture helium. That's the reason I said it, because it's a limited resource.

@@BlueBetaPro Tokamaks or ITER will be produce helium as waste. So it is normally possible to produce helium.

@@BlueBetaPro is there any system to convert liquid helium to gas ?

@@ilkhomis3644 What? Liquid helium exists only under certain conditions and easily converts to gas at normal room temperature and pressure. en.wikipedia.org/wiki/Liquid_helium

You know it exists in the atmosphere naturally too right? But im with you, stupid fucks should of salvages this and all the others they just vented...

Only reason it doesnt get captured is because helium has a boiling rate of 750:1 liters, meaning that 1 liter of helium liquid turns into 750 liters of helium gas. You would need an ridiculously large pressure vessel to capture the thousands of liters of helium

It’s not like it can’t be recaptured from the air they just put it back where it was originally

@@1992djg we don’t get helium from the air 😂 it’s mined from the ground. It comes from radioactive decay over many many years, so it wasn’t in the air originally. Btw, recapturing it from the air isn’t that easy.

@@Steve211Ucdhihifvshi Actually, it doesn't really. Atmospheric helium tends to escape from the atmosphere.

The big old Oxford dual-cryos used to use liquid N2 to help insulate the helium! They are by now probably extinct. They had the bolted ends! Those yielded up more than $25,000 dollars in scrap at the height of the non-ferrous market in '07-'08!!!

Imagine all the potential laughs wasted! Oh, that's Nos, but still, humans sound pretty funny after huffing Helium!

Yeah surely they could pump that shit out. Fucking backwards ass country.

@@Steve211Ucdhihifvshi hmmmm ever considered how big of a vessel youd need to contain this amount of helium?

@@tinysmoll probably smaller than the machine showed in the video

@@TheGiuse45 never heard of expansion from liquid form to gassious form, it is LIQUID helium, The expansion ratio of liquefied and cryogenic from the boiling point to ambient is: nitrogen 1 to 696. liquid helium 1 to 757. so uhm unless you got something thats 757 times bigger than that vessel it just is not a feasable thing to do

Trying to extract helium from an MRI is like trying to extract water from the vents of a steam locomotive, its dangerous, too fast, and if done carelessly may result in detonation of the machine, your best bet would be to place the entire machine in a large vacuum chamber and use a drone to manually boil the helium, then somehow freeze the entire vacuum chamber, then pump the floor of the chamber into bottles

@@samuels1123then if possible I would think they should engineer them in the future to make the tanks safely removable!

I hate wasting helium more than anybody. But, please provide me your phone number, and you can bring the cold dewars, the fittings the next time, and I will let you go for it. Whether the vacuum plug was pulled or it boiled off over time, the net helium lost is equivalent. Organizing the logistics for cold dewars and the rest, we would have lost the helium any way, as this magnet was rapidly loosing it's helium due to lack of a coldhead running. There were other business considerations at play too. Magnets quench all the time. Just the nature of the beast. We posted this for educational purposes, so now consider yourself educated.

Hence all children helium-baloons. Chrildren are very "environmental. ((Fridays for future). They allways recollect the Helium after a primary school bithday parties. Very much unlike those bumpkin-"experts" here.

helium is not limited. that's a farce.

No it is not, 32% of the worlds Helium comes from the Middle East.

Helium is a natural gas product. Its not rare. The natural gas coming from certain areas contained almost 3% of helium. The issue is refining it.

How much of it do you need to refill in normal operation? I mean it will start boiling when it cools the magnets?

@@carsten.hamburg8771 After a quench the magnet is refilled with liquid helium and that can be hundreds of liters. The magnet coils are cooled to close to absolute zero before they are energized and are kept that cool by a cryogenic cooling system when the magnet is energized. In normal operation some helium is lost periodically and topped up but never boils.

It can be compressed but there is an ENORMOUS gas volume if it is allowed to convert from a liquid. That much volume is handled as a liquid, and recovery is difficult. They wouldn't likely have a compressor on tab capable of compressing it to an ultra-high pressure. The liquid if it is recovered would have to be transported right-quick since a Dewars container will allow for escape as the liquid boils or the tank would explode! The critical temp and pressure numbers for liquid helium would be so ridiculous you could never contain it! It would probably rise to 40,000 PSI before it reached phase equilibrium!

@@junkdeal I guess helium is not that rare enough to warrant a recovery by the manufacturer.

Doing this today would just be throwing money away. It's worth the cost of recovery since selling the recovered gas or liquid would bring a decent profit. 6 years ago though it wasn't quite worth it.

I'm guessing that could be up to 1100 liters of liquid helium. You could pump it over to a new vessel but by the time you mess around it would cost more than what its worth. The burst disk they just popped was probably $6k +

all the balloons that could've been filled :/

That airship type of helium is not comparable with Heleium used for Cryogenic applications in order to reach -273C The really expensive helium is 99,99% pure.

Yeah. I see hundreds in the sky every day.

@ProcotorsGamble I think you are thinking hot airbaloons

because they want a show.. despite what hey say, the helium can be recovered but it takes time and would be boring.

@@kakurerud7516 just open some co2 cannister ffs

@@bdblazer6400 not as fun as a million dollar machine.

It’s not within hospitals budget

@@Liebe-Futurel I don't think they know that it really can be. watch?v=5-RYEuXsiVo Since the machine has the equipment needed to do this literally built in.

back in 2015 (date of video) it wasn't as expensive

It can be done but their excuse is "It's not cost effective". With Earth's dwindling resources I would say Make is cost effective.

Video would have been way less cool

back in 2015 (date of video) it wasn't as expensive

We can produce it... will be just like 10.000x more expensive.

“When it’s got ya, it’s got ya! It’s not really all that dangerous as it is only about 14.7 psi forcing your hand to go into the vacuum.

Yea it's not at all like delta p underwater. In the water you're talking about many atmospheres of pressure. In this case its just one.

@@johnanders8861 Lean your belly against that opening and your guts will go inside the tank! In the '80s I knew of a mechanic who got killed at Prairie Materials in South Holland who was working on a Detroit Diesel with the intake hose off and it was running when he got his stomach against that huge vacuum and it ripped a hole in his belly and sucked his intestines into the blower!!!

@@junkdeal oh Jesus. I wrote that comment before I knew much about physics and atmospheric pressure. I completely agree

@corey Babcock I'd have hated to have been that guy! Literally dis-emboweled by an engine! The Roots blower on these engines suck in literally thousands of cubic feet of air in a very short time! The whole key to Detroit Diesel engines is the blower clearing out the spent combustion gases and replacing the chamber with an abundance of fresh air. Another source of sometimes fatal incidents is in a swimming pool. If an intake hose to a pool pump is wrongly connected directly to the side of a pool instead of a skimmer chamber, you can actually be trapped to the opening and either drowned or seriously damaged by the suction. It could theoretically dis-embowel someone if it got attached to an area like a lower stomach or at least really damage the skin anywhere it grabs you.

I don't remember the OR number for it, but it was a Symphony.

@@2605155 that was the OR70 then, OR24 was the Harmony.

Well it's the same process

Many incredibly complex, high precision machines can be killed very easily by the smallest things. Its kind of awe inspiring to stand back and marvel at the complexity of something like a jet engine, and realize a few ice crystals caught in a heat exchanger can kill it. A few .50 cent O-rings and its doomed. Incredible technology, and so easily killed. And when its day has come and its no longer useful its pulled from service and recycled to become new things. The whole process is actually kind of poetic when you think about it.

I agree. 10s of millions of dollars went into that design but it has ran its life cycle. Thank you again for you service Mr MRI magnet.....

As best I'm aware, the ability to recover and reuse the helium in these machines hasn't been particularly viable till just recently. In which case, we can enjoy these older videos since its likely there wont or shouldn't be many more from recent times.

Actually not really. The containment tank (what you see) is under vacuum. The magnet core inside the stainless holding tank is under, oh I don't know for sure, but probably a couple hundred PSI. It is kind of like a boiler in a sense. It contains the liquid and vapor under pressure which causes a shift upward in the boiling point of the helium liquid. It actually has a function like a flywheel - hard to visualize or explain, but the stored latent heat gives it a differential to work off of in circulating and handling the liquid. It doesn't perform any work in the sense a boiler does, but a boiler has 2 (at least) functions. Deliver pressurized gas (steam) to do work, but the boiler is a flywheel, in a sense as it stores energy and works as a reserve. It will actually deliver steam even WITHOUT a fire in it for quite a while. NOT the same principle as an air tank for an air compressor, because the boiler "lives" off of a principle known as a BLEVE principle. It will deliver huge amounts of steam with a "dropped" fire running off of that scientific principle! A barbeque propane tank is a boiler as well, just running off local heat with no fire. BUT it is the SAME principle- it delivers a LOT of gas for a LONG while until the liquid propane chills off and stops converting to a gas at an adequate pressure to actually come out of the tank! The BLEVE principle-boiling liquid expanding vapor! Running off LATENT HEAT....STORED ENERGY FROM PREVIOUSLY APPLIED HEAT AT A HIGHER PRESSURE THAN THE LIQUID COULD EXIST AT WITHOUT PRESSURE ABOVE IT!

Nope, youd need a balloon bigger than the hospital to even notice a weight change in that. Heliums good, but it aint that good.

It was actually lighter after the helium was released.

Its under pressure and liquid so no lift

although helium gas is less dense than air, here it is cooled into a liquid, no known liquid is lighter than any known gas that can exist in large environments

@@samuels1123 Not true. Consider pressure.

Not when the vacuum insulation chamber is compromised and the super cold liquid(like -400F) inside boils/sublimated into gas.

What does it do?

@@juliogonzo2718 a mri magnet is one of the most powerful magnet on earth. having 2 next to eachother strapped down could create a artificial Aurora! that would be amazing to see and walk through it

Cryo pumps go cheap on ebay

@@cre8itgroup903 depends issue is to get a cold head that matches the compressor and also get wiring etc.

The tank is a Dewars vessel. Insulated by intense vacuum and layer-after-layer of Mylar film to prevent ALMOST all heat from getting through to the liquid HE. If you compromise the vacuum you would NOT BELIEVE how rapidly heat will the conduct through that tank!!! The rising pressure of expanding helium in the "center chunk" that contains the superconductor magnet portion will blow through a thin burst disc and roar out into the atmosphere! This will happen in SECONDS once the vacuum goes away! When they "quench" they actually turn on a "toaster grid" inside the magnet tank part, and that influx of heat causes a MASSIVE pressure rise which will blow the disc! You don't need or want to compromise the vacuum when you do this! The hearer elements do the job in a quench!

@@junkdeal thanks for the explanation. That makes sense.

its way too expensive. when liquid He turns to a gas, it expands a lot, about 750 times the size

Wouldn't want to breathe that smoke in😂 gunna end up sounding like a baby suffocating

$

40 year of supply of Helium? What is your source? What is the current demand and the supply? 40 years at using it at what rate? There is NO more deposits on this planet? We found every single gas deposit on this planet? I'm calling BS. Supply far exceeds demand. You really think they would be thinking of using helium for future transportation if it was so limited. Hell, we are humans, won't be long before Musk or someone starts refining helium from space. 23% of the observable universe is helium.

cool hehe

It escapes into space when vented, it does not recirculate, so when it is lost it is lost forever.

Your lungs will only freeze if you literally breathe it in via a pipe. You would probably die of suffocation due to lack of oxygen and cold burns.

Sort of. The loss of the vacuum destroys the principle of the Dewars container, the amazing ability of a vacuum to insulate terrifically cold liquids. When you see the guy pull the plug, the in-rushing warm air superheats the liquid inside and it violently boils, instantly!! The next thing that happens, is the high-volume surface area bursting disc blows open as the pressure soars in the tank. This is the roar and fog. The BLEVE principle is at play here too! Boiling Liquid Expanding Vapor. Interestingly, some atomic and molecular structure substances that are gases at our atmospheric temperature and pressure, have a CTP or critical temperature and pressure that is so high that you cannot contain them in a liquid state on this planet by simply building a strong enough tank. The pressure would rise to ungodly heights before CTP occurred. They are stored in a Dewars vessel. The liquid boils inside and in doing so, absorbs heat which keeps the rest at the super-low temp it exists at. There is always some intrusion of heat into any container no matter how well insulated. This heat isn't much in a Dewars. NOW, if you close a container completely with a boiling liquid inside, of course, the pressure rises. ALSO the boiling point of the liquid rises. ( boiling water at 212F. Under pressure, it boils higher. Maybe 240F at 30 PIS. 800F at 300PSI!!! A locomotive boiler!) This abnormal condition results in a LARGE amount of heat stored as latent heat. It is all the heat that RAISED the temp of the liquid under pressure above what it would be under NO pressure. If you SUDDENLY allow the pressure to escape, this heat is INSTANTLY available to boil ALL the liquid INSTANTLY as it attempts to revert back to the temperature it would be at with no pressure! This is a BLEVE explosion. and it can be as violent as a dynamite blast! The boiling liquid is actually refrigerating the rest of itself, since it needs all the latent heat it has stored in itself in the mad dash to go back to the much lower boiling point of no pressure. Some gases will achieve CTP at a pressure we can contain! Ammonia (NH4), and Propane (C4H10), both can be held at about 150PSI as a liquid. If you open the valve, the tank gets bitter cold from the sacrificial refrigeration due to the slow lowering of pressure. Applied heat with a fire is necessary to do this with water. BUT that is EXACTLY what a boiler does. BUT if any of these liquids are already under pressure in a tank, a sudden release like a seam failure will result in a BLEVE explosion! A boiler works only because of this science principle! In fact if there is no fire under the boiler, as long as a good amount of pressure, it will still provide this pressure while you make use of the steam because the water will boil, for hours maybe, due to the stored latent heat, until the water is down to 212F where it will no longer have any LATENT heat! Wasn't that easy!!!!!!

so does the refrigeration need to happen constantly during the life of the MRI in order to keep the boiler from exploding?

I'm sure it does in a way, but I know a little less about the process during the active life of the MRI. From what I believe, the "cold head" is perhaps a pump that takes vapor and pumps it to a special refrigeration unit that re-condenses it into liquid. But the principle of "sacrificial refrigeration" is the way that all cryogenic liquids are stored. They would explode the container if the container was closed off, because the pressure would rise as the temp warms, up, and it would be a never-ending cycle as the liquid-gas combo tried to achieve CTP. You couldn't make a container strong enough that could even be moved! The pressure would be probably at least 20,000 PSI before it stabilized! Remember that with the super-cold liquid at atmospheric pressure would be just like water with a blast furnace under it!! Except with Oxygen, Nitrogen, and some other gases, this heat is just in nature! Liquid Oxygen would exist on planet Uranus just because it is cold enough, but water would never exist on planet Mercury as a liquid because it is so damn hot!! Water will follow the same rules as other gases. With a closed container, as the temperature rises, so does the pressure, UNTIL CTP is achieved! AT THIS POINT THE GAS AND LIQUID ARE AT THE SAME DENSITY, SO NO ADDITIONAL PRESSURE CAN GENERATE! I know this is kind of hard to follow, but it is when you start to relieve pressure on a closed vessel, the boiling point of the liquid falls, so AT THE LOWER PRESSURE, the liquid again begins to boil WITHOUT ANY ADDITIONAL HEAT!! But it uses the LATENT STORED HEAT to do this, so the liquid actually gets colder! THIS IS ACTUAL REFRIGERATION, THE WAY YOUR REFRIGERATOR WORKS! It is just that some compound gases like Ammonia can be contained at our normal temperatures in a reasonably light container! Propane is a gas until -35F or so, but AT 70F it is 100 pounds pressure in a tank, but it is still a liquid! I don't know what CTP would be for propane, but it would have to be pretty hot to get there! If the tank didn't explode first! So, this "sacrificial refrigeration" means some is wasted by letting it escape as a gas through a relief valve to save the rest! In a Liquid Oxygen tank, which I personally use every day in my work, if you don't use it often enough, eventually it will all escape!!

Pehaps they filled the cryostate with liquid nitrogen for this demonstration. Normally you do this because its much much cheaper

"Very easy", do go on, tell me how one would manage to recover many liters of liquid helium from within a vacuum vessel without destroying the very vacuum layer that keeps the helium from instantaneously boiling off

@@peregrinedevelopments3730 Save it by filling it in a very very large helium tank...