The Stirling Cycle part 1 (Stirling Cryogenics)

[@JohnSmith-of2gu]

I feel I've learnt more about both the theoretical and practical aspects of Stirling engines through this video than I have through everything else I've read/watched put together. Old industrial training videos like this are valuable gems.

[@Taconic66]

Same as a non engineer I understand the P V chart a bit better now

[@_SimpleSam]

It's deeper than that, sadly. Our IQ in the west has been falling. Even conversations between average people, from this time period, are at a different level than most present day conversations.

[@TaigiTWeseDiplomat--Formosan]

：０@@_SimpleSam

[@matthewfickett8434]

When it starts with music like that, you know you're gonna learn something!

[@rocpile1141]

I guess I missed out

[@1islam1]

🔴 What Is Islam? ⚠️ 🔴 Islam is not just another religion. 🔵 It is the same message preached by Moses, Jesus and Abraham. 🔴 Islam literally means ‘submission to God’ and it teaches us to have a direct relationship with God. 🔵 It reminds us that since God created us, no one should be worshipped except God alone. 🔴 It also teaches that God is nothing like a human being or like anything that we can imagine. 🌍 The concept of God is summarized in the Quran as: 📖 { “Say, He is God, the One. God, the Absolute. He does not give birth, nor was He born, and there is nothing like Him.”} (Quran 112:1-4)[4] 📚 🔴 Becoming a Muslim is not turning your back to Jesus. 🔵 Rather it’s going back to the original teachings of Jesus and obeying him.

[@ahmdabdallah5811]

What Is Islam? Islam is not just another religion. It is the same message preached by Moses, Jesus and Abraham. Islam literally means ‘submission to God’ and it teaches us to have a direct relationship with God. It reminds us that since God created us, no one should be worshipped except God alone. It also teaches that God is nothing like a human being or like anything that we can imagine. The concept of God is summarized in the Quran as: { “Say, He is God, the One. God, the Absolute. He does not give birth, nor was He born, and there is nothing like Him.”} (Quran 112:1-4) Becoming a Muslim is not turning your back to Jesus. Rather it’s going back to the original teachings of Jesus and obeying him

[@ShawnJonesHellion]

at least a good new song to play on the timpani

[@ballHand]

Sounds like the intro to an 80s horror movie

[@Apolopy2]

Old explanations are better than present times.

[@OmarAhmed-cm3mv]

I do agree .

[@VeganSemihCyprus33]

Those are the times when people care about public education.

[@VeganSemihCyprus33]

Xylius Schaaij I thought they cared about the public and aired this on TV. That would be nice, maybe then they would not elect Trump. Too late anyway.

[@VeganSemihCyprus33]

Xylius Schaaij Knowing science leads to.

[@smh9902]

I have far more scientific and mechanical knowledge and prowess than 98% of the population and am a registered genius with the triple 9 society and a former member of MENSA. I voted for Trump and will likely vote for Trump again.

[@buggyland]

Absolutely the best Stirling Cycle video yet!

[@alan_clough]

I really like this style of teaching where they show how something works in a linear manner.

[@wrenchboostboi8994]

Love it. I just love how these types of inventions are built off a simple principle that somebody knew and then had an idea of how to use that principle to do work or create energy. They believed in that idea so profoundly that they never gave up no matter how many impossibilities, issues or tasks they faced, knowing there is always a solution to a problem. They kept dreaming up new solutions and ideas, building them, testing them, re-engineering, improving, etc. Simply amazing! If i were a rich man with spare time and resources I would definitely love to try engineering or designing new ideas or technology. Unfortunately, its just so far beyond my capability right now... family, job, responsibility, resources, etc. I guess I can always just try to be creative and try to dream something up! Or start small... lol Cheers everyone

[@OKFrax-ys2op]

If a minster could do with probably a very low income, how rich are we today to go even further?

[@nikbivation]

wow, this is still maybe the best explanation available on youtube up to date for stirling engines

[@remasterus]

How on earth are modern videos not nearly as good at explaining things as these ones?!

[@kaboom-zf2bl]

lack of understanding ... a stirling engine is a heat pump ... literally ... meaning it is a differential heat engine ... it needs a difference in temperature to work ... and it is the analog version of a pelltier device ... and like the pelltier device it is also reversible ... meaning it can heat OR cool stuff

[@pierreseguier5639]

This presentation is wonderful. Absolutly wonderful. I wishes english native people speaks this way.

[@jasonwalters9951]

This is a priceless video. It is a clear concise description that cannot be found in any of the many texts written on the subject.

[@Berkana]

This is great. I wish Phillips didn't abandon their Stirling engine program in the 70s. What a loss of a profoundly amazing technology.

[@smh9902]

At 40% efficient its quite a bit more efficient than most diesel engines today and definitely most gasoline. More interesting, however, is its ability to cleanly run and burn any fuel, gaseous, liquid, or solid.

[@m.w.2098]

NASA made some and published it in the 90's. I just watched it here on KZbin. I just emailed them asking for a PDF of the blueprints they used.

[@promethium752]

@@m.w.2098 Did you received any reply from NASA to your blueprints demand?

[@driverjamescopeland]

The efficiency of the Sterling cycle is misleading, to say the least. Where gasoline and diesel engines gain efficiency with load, Sterling engines lose efficiency with load... due to heat soak on the cold side of the chamber. It's too bad that engine is so mass intensive... in theory, it would work great as a marine engine, as the water could be used to cool the condensing side of the chamber.

[@driverjamescopeland]

Br!an Delta V - most modern diesels operate at 50-60% efficiency. Several gasoline engines have seen 40%+ efficiency, thanks to Atkinson cycle designs... but only under peak load. The new Koenigsegg "Freevalve" engine could see part throttle efficiencies raised, as well... with it's independent control of valve lift/duration, the valve timing can be tailored to facilitate valve operated throttle modulation. This would allow not only better low-load throttle control, but also provide vastly improved transitioning through throttle response, as the peak part-throttle vacuum would only be exerted on the cylinder/combustion chamber (as opposed to the entire intake volume)... even better than ITB injection, runner valves, etc..

[@woehogsghost]

10:00 can't be unseen.

[@harsimran1]

This animation and walkthrough is better than any scientific explanation with animations of the modern era. I've seen a lot of them. It's 2021 and nothing beats this presentation. Even NASA puts out shit compared to this.

[@MrRolnicek]

40% efficiency is REALLY good, isn't it? I mean even now compared to modern turbines.

[@Shunteration]

It's better than steam locomotives, however, most diesel engines have about 40-45% engine efficiency, so all the sterling has going for it is it's cleanliness.

[@alen7480]

Much better than the gasoline internal combustion engine which is often about 25% to about 38% for the most efficient modern engines (at the time of this video, more between 10% to 20%). Not as good as some electrical motors however.. but damn, I am impressed, especially for the fridge.

[@mihaiilie8808]

@@Shunteration diesel has 25% efficiency when its new.Gasoline has 15-18%.Steam turbines have 40% efficiency but can go up to 60 in the future.Thats why all power plants use steam turbines and not diesels.

[@wisenber]

@@mihaiilie8808 "Steam turbines have 40% efficiency but can go up to 60 in the future.Thats why all power plants use steam turbines and not diesels." You're not factoring in the loss of efficiency for the source of steam. A turbine may have that efficiency, but it requires outside energy to move it.

[@blueckaym]

given that at the end of 2019 solar panels have between 20~22% efficiency 40% is indeed already great. However Stirling engines have the potential to get closer to Carnot engine efficiency ie with modern materials and tech it might grow in the future to 50~60%. However for present days the more practical question would be to lower the costs of building such a Stirling engine. Because if you hook it to Concentrated Solar Power (CSP) dish you easily can afford losing some light energy (given that it's free ;)) and if you're living in a northern or cloudier climates simply by using larger CSP dish you can easily compensate the lower light intensity. Also use of parabolic mirrors is not mandatory since you don't need pin-point precision in the concentrated light cone - as long as it falls inside the heater's chamber it'll be fine - so your CSP dish can be done by faceted mirrors. So I guess the main difficulties with such engine construction would be the seals - to preserve the working gas pressure (and to avoid leaking dangerous hydrogen or precious helium), and the materials that must withstand high temperatures (around the hot-chamber that is). That last part is important since heat-engines theoretical efficiency is improved by having greater thermal differential between the hot & cold chambers. And I guess optimizing the heat-regenerator.

[@radarbob9971]

I'm a believer. Slap a set of focused mirrors to direct sunlight on the heat chamber and you have got one hell of a cheap solar energy generator. Bearings or lubrication would have to be out due to the high maintenance. Air bearings would be ideal. And if used the system would have an almost unlimited life. Perfect.

[@Pencil0fDoom]

ive seen one YT creator demonstrate this tech on a small scale already. Zero emissions, unlimited supply... I wonder what could possibly be preventing the scaled up adoption of this century plus old technology en mass? [wink]

[@azteacher26]

kzbin.info/www/bejne/rHjHhWytadqVgsU

[@Loken-g9o]

This video explained the concept very well

[@ricktaylor7346]

I used to operate a Spectrometer that utilized a Sterling Cycle Cryocooler to cool its infrared detector. Turn it on and 5minutes later you were in business. It was way more practical than dragging a dewar full of LN2 in a field setting.

[@delandoduggan7698]

This video is just PERFECT. Thank you so much !

[@nuassul]

Esta es una joya de video, sin duda este motor que muestran es una de las configuraciones con mejor eficiencia y rendimiento en esta clase de motores Stirling.

[@paradiseisland69]

From wich year is this?

[@oldtwinsna8347]

Good stuff. It's what they used to run in elementary schools when they taught real science. Now kids can't even read and write when they graduate high school.

[@alexandergalvisrios2312]

aaQ

[@araylaurence6220]

what

[@Muonium1]

Nobody was showing films as advanced as this in elementary school. Anywhere. Ever.

[@vid2ification]

9:55 saw something like this for sale at an adult novelty store once...

[@pattayaguideorg]

Wow, amazing vid and description, first thing I though was using a Peltier device as a heat and cold supply for the engine.

[@kaboom-zf2bl]

they are exactly the same principle ... one is analog (striling) the other digital (pelltier) ... and BOTH can go either way

[@MDKalach]

Why are these old videos the clearest most illustrative ones available? How can I find more?

[@abrahamanthony7106]

Pro Tip: Speed up the video to 1.5x.

[@MatDuJardin]

#LifeHack

[@eslachance]

You're the MVP.

[@AlbatrossDude]

Thank you so much! Interesting as fuck, our life speed is 50% higher than 50 years ago!

[@sebimoe]

+AlbatrossDude Or our attention span is half as much as back then :v

[@mosab643]

How did they used to do animation like this back then?

[@realalexesparza]

There is a tendency to think that people are smarter now than they were in the past. Watching this video and others like it, I don't think that's the case.

[@StirlingCryogenics]

Part 2 can be found in the DHindustriesusa channel; and I have added the link in the description

[@russ1618]

Wouldn't ammonia freeze at the cold end of the cycle? I mean, it freezes at like -78*C. It just wouldn't do to have your working fluid (ammonia gas) suddenly go slushy and then solidify. It's probably best to stick to hydrogen or helium.

[@DanielLy1200]

Very interesting indeed! Thank you for sharing.

[@LukeSkyscraper]

That was really interesting

[@russ1618]

Hate to be a skipping record, but what happened to part two? It had all demonstrations on a real Stirling engine, and wow were they impressive. I miss part two!

[@kaboom-zf2bl]

they dont want people making their own liquid nitrogen hydrogen and oxygen ... I guess ... because that is PART II the other side of the engine ... getting VERY cold ... like 40Kelvin ... or near to -270c

[@FrankensteinDIYkayak]

looks like a good well thought out design. I wonder though how those rhombic drive pins are lubricated.

[@nesakysiu4748]

what i have been stuck with is the idea, that there is nothing preventing this engine being built with stone age technology, all you need is a pot, some leather, wooden flywheel and open flame

[@ballHand]

Can someone please explain the buffer space to me

[@williamgosvener47]

The issue is the ability of throdeling and waight/power ratio. They make great stationary power plants but are hard to use in things like cars.

[@giovannifontanetto9604]

3d metal printed cilinder wall may make it even more optimized

[@iwanttocomplain]

6:50 wait a minute. There's porous metal?! 10:00.. stop giggling at the back!

[@shriharir6450]

Well.. You caught me😂😂

[@OmeedNOuhadi]

Wow, that was really cool! 👍

[@reticenti6365]

That is so cool. I want one for my boat.

[@anilkumarsharma1205]

if sterling engine is under very high pressure then will it work more efficiently since the energy source is same but atmospheric pressure is too low to bring out the exact efficiency

[@TheEvilestUser]

This feels like a lost technology. I believe this is the easiest source of green energy I have seen yet and yet no one is even talking about them modern day. You can power this thing with a Solar Fresnel Lens or a concave mirror and a moderate amount of Sunlight. It is quiet, efficient, and has very low maintenance. Plus it is 100% recyclable should it ever need to be removed or replaced.

[@ThePataks]

wonder if you could use super critical co2 in some way like this - the change from liquid to super critical is fairly rapid and also pressure increase.

[@carolynmmitchell2240]

ThePataks that will slow it down alot.. make way more drag. hydrogen is your best bet because it has a super high thermal conductivity and very low freezing temps.

[@carolynmmitchell2240]

ThePataks it also is a lighter then air gas so it makes it function much smoother

[@commoguru]

​@@carolynmmitchell2240 Hydrogen is a dumb idea, it's highly flammable, you have to use inert gases in sterlings like helium which has good thermal conductivity but won't blow up your engine like hydrogen would.

[@okelepoka]

It wont blow if you keep oxigen away. It can not burn without oxigen remember?

[@kaboom-zf2bl]

@@carolynmmitchell2240 helium is safer and is very close to hydrogen in thermal conductivity ... and easier to get

[@B0RN2RACE100]

The best source of heat for this engines should be exhaust gases from modern engine and cooling system from modern engine. If able to collect 40% from the exhaust gasses and 40% from the cooling system. It would make a stationary diesel engine one of the most efficient engines currently available

[@bushcaptain]

This is great stuff, the Swedish submarines have been running the sterling engine for some time now. Think about the possibilities, hydrogen gas made easily and a source of solar energy. That is all it needs really to run the majority of households around. The problem is to get a sterling engine?? Where? From what I understand its quite expensive to make

[@kaboom-zf2bl]

Helium is safer ... and easier to purchase ... hydrogen has a draw back ... add a spark or flame ... to a leaky system and POOF ... one engine down ...

[@PatrickStar-lu3ot]

But how do they seal Helium?

[@Znlexport]

What regenerator exactly is?

[@mickcarson8504]

Is this the Phillips Televisions company?

[@jhyland87]

For some reason, I still don't get it. I get how compression/expansion effects the temp, but idk how the displacer piston helps.

[@DirkdeZwijger]

I'm pretty sure most people don't understand it because it's very hard to grasp in just one video. It personally took me a few weeks before I sort of understood what was going on principally. I have done an internship at this company last year and now again, so I sort of follow whats going on. Still I need to watch this video because I forgot the details of the principles lol. I am gonna try to explain it to you, because it also helps me understanding it better. Please tell me if you don't understand parts, because I learn a lot from it too The displacer makes a new chamber. Now you have the crank case area (the big one of the right), the middle chamber and the far left chamber. The middle and far left chambers have very similar dimensions. Especially compared to the crank case area, which is much bigger. As far as I know, the displacer is used to make sure that the two different sides of the cilinder wall don't need to change in temperature. Now you have a 'hot' chamber and a 'cold' chamber, where energy is retained and not constantly changing. Now the greatest affector of efficiency is the circulating work gas between these two chambers, that take the heat and cold of the chambers to the other. The regenerator serves as a sort of 'energy buffer', that 'stores' cold or heat depending on the phase of the cycle. This is to make sure that hot and cold gas don't change the temperature as much of the opposite chambers, therefore increasing efficiency. When applied in cryogenerators (what the company does), the functionality of the two chambers are switched around, making the far left chamber very cold. A tube filled with for example hydrogen or nitrogen gas passes this cold chamber, resulting in liquifying the gasses. (This is a different tube than the one they use in the video!!!!) Effectively, the cryogenerators are Stirling engines working in the opposite way. The crankshaft is powered by an external electrical motor, because creating this 'cold' of course requires power.

[@MrMrprobro]

Thanks for the video, tried to make one based upon Philips design, design is on my channel

[@stanleydenning]

I agree with John Smith. 👇 I only wish I could have seen the rest of the film.

[@jimviau327]

AH ! Now I understand! I want more . Where is part 2 ? The more advanced math version .

[@MatDuJardin]

10:10 graphic enough ?

[@Hunar1997]

It looks like

[@richgowell7166]

I think I have an idea for an open cycle (valved) hot air engine that could have a much better power to weight ratio. Wish there were resources.

[@crazysquirrel9425]

I wonder why they didn't add a 2nd one 180 degrees from te first one. Shouldn't need counterbalancing weights and you can scavenge more energy that way. Run the heat/cooling tubing between the two and it should auto balance by itself.

[@alimanchua2327]

Mestinya ukur arus in dan out jadi tahu daya input dan output

[@TS-1267]

... EXCELLENT...👍👍😁😁

[@chadcastagana9181]

8:15 Does the Rhombic Drive function as a mechanical rectifier? Can it be used as such?

[@Iceflkn]

Wouldn't there be an unavoidable inefficienty created as all of the tube and piston get heated by conduction? Could some kind of insulating features be built into the design itself to offset this problem?

[@strongback6550]

Stirling engines have been constructed out of glass, so utilization of ceramic materials is definitely on the table. What needs to however be addressed is elimination of vibration when working with such brittle materials. Of course, the more hard the material you work with is and the more resistant it is to heat deformation, the greater precision you can maintain when it comes to part tolerances. Metal, from my perspective, does not seem to be the optimal substance for many applications on a thermal difference engine.

[@Pencil0fDoom]

ive seen one YT creator demonstrate this tech on a small scale already. Zero emissions, unlimited supply... I wonder what could possibly be preventing the scaled up adoption of this century plus old technology en mass? [wink]

[@aroo270]

What is this modern regenerator material he speaks of?

[@steveforbin911]

Sorry your idea of adding more cooling changes the process dynamics and piston sweep area. Sorry to burst your bubble. Time to rethink this part. Great show and very informative. Should work for those electric cars start it up and let it generate at the most efficient numbers. This is designing to get the most heat(BTU's) to kw-hrs More conversion means less heat an more efficient energy generation. The future belongs to the most efficient.

[@sietzevandeburgt681]

A use for a heat pump in reverse would be nice using ground heat ? Than also as an additive to systems producing excess heat and a heat difference is available!!!

[@azteacher26]

These would be great to place in really cold places like the polar regions or places with high geo thermal activity.

[@Jeffrey314159]

When was this film/movie created? The 1970s?

[@oshkiv4684]

Jeffrey314159 Looks like the 60's to me

[@cellman64]

İ love that system Ever since I saw.thank you for this video

[@Cyber_Kriss]

Where's part 2 ???

[@raymondzhao9557]

very interesting

[@adoreslaurel]

I have thought of trying to build something like this and wonder if the displacer piston should not only be a close fit but also as hollow as possible so as not to retain heat.

[@Dorkus89Malorkus]

Correct - a material that is a poor heat conductor will do the best job. Just make sure that the melting point of the material is higher than whatever temperature you intend the tube to go to. Whether or not you should leave it hollow depends on factors such as the strength of the material and again the heat conduction. While air is a poor conductor it doesn't add any structural strength. Good luck with your project. One of my most memorable moments from college was when we built a miniature Stirling engine-run car. It ran entirely on the difference of temperature between water ice and the room. For some added efficiency you could put dry ice on it too. I wish I still had that thing. If I have the time I'll build one for myself this summer.

[@adoreslaurel]

John Bought one on on Ebay, the one with the 4 led's generator, works like a charm, made one myself BUT the bought one has a low friction power piston WITH compression, mine has insufficient compression so does not work,obviously this is the hardest part to manufacture but I wont give up, am looking for a suitable material, tried running the last one in a smooth brass tube, the bought one looks like a plastic one on metal running in a glass tube. my piston was made of "Knead it" epoxy putty which I rubbed graphite powder into before it set on the outside and squashed it into a greased [but wiped] cylinder not a success unfortunately.

[@NOBOX7]

it is close fit at a pint in the middle

[@adoreslaurel]

NOBOX7 Thanks, I will keep trying, I down loaded the vague plan of the one used to drive the Multi stop van at Langley AFB, very sophisticated engine and there is a lot of info to read but the diagram is hard to decipher. Have a look at it on youtube.A contributor to youtube has given the website.

[@Dorkus89Malorkus]

john brown That sounds like a lot of fun. Make sure you upload a video and reply here if you're successful. I'd be really interested in seeing it. I'm way too swamped at work to get anything done on my projects right now. I'm currently in the process of scavenging some old electronics to build my own spot welder.

[@Khwartz]

Wow! The Best Ever Explaination on this engine! :) And What A Genius The Human Can Be! :d

[@mememe3161]

A Stirling engine as big as a house couldn't power a skate board down a hill with the wind to its back.

[@ManyHeavens42]

Try heating with conductive Heat, electric coil. nothing is Wasted, free Energy , can't you imagine a big one how much juice that bady would put out , we need he was big enough one to run a Tesla motor , what do you think

[@vickykhan9414]

Sir u have make best vedios but english wording on vedios trouble we can't se ur vediiis mechanihsms

[@wijayacanel4062]

Ide yg bagus👍

[@Olwmatt]

I agree where is section 2

[@andrewdarley8988]

There seems to be an awful lot of confusion around the different types of Stirling engine, alpha gamma and beta. You say this was the patent submitted in 1816 and then describe [very lucidly] the function of the beta cycle whereas Lindybeige shows the actual model that Stirling built in 1816, now in a museum, and it is quite definitely a gamma cycle. You can't both be right. And incidentally whichever of these two RS did come up with first why aren't they known as the alpha cycle?

[@mrpiotr231]

great video man

[@Cyber_Kriss]

Thanks a lot !

[@ken1ken2kenken]

Great vid! Thanx!

[@barumman]

A good video, Thanks for sharing.

[@oswaldoriginal5037]

If this engine is that so efficient, how come NO ONE is using it since it was first invented?? SOURCE of heat is aplenty, during the day just focus the rays of the sun to the hot plates or cylinders for example, charge batteries during the day to use at night, etc

[@Xrayflames]

Its less efficient as it gets larger, so viable large scale ones are still questionable, but in the 80s a car was produced that was efficient and functional using a sterling engine. It also had nearly 80mpg

[@oswaldoriginal5037]

@@Xrayflames Even if less efficient, the heat of the sun during the day is free. Maybe it can generate more power than the solar cells

[@Xrayflames]

@@oswaldoriginal5037 there is a type of solar array which uses a Stirling engine, and its one of the most efficient solar dishes available now

[@Jalae]

this needs to be combined with a rocket mass heater

[@travismosser3988]

Is the narrator David Carradine? lol kill bill explanes thermodynamic principles to me, I love this country, diddnt teach me how to spell, or type but made sure kung fu mastered my understanding of temperature differentals.

[@justarandomweeb3220]

Lol i can here from Dr. Stone

[@MultiSchuman]

In those golden time, every one was either an engineer of some sort or a girl. And people shared knowledge through various mediums. Nowadays everyother person you know is either stock trader, sellsman or most probably a pretender, pretends to know everything to be exact.

[@turul107]

Passive voice makes this video hard for me to understand. What the heck does he mean at 5:41? "Then compressed, and again, work is done." What does the work? On what is the work done?

[@heatherroseisrflyer]

There is actually no compression, there instead is contraction of the working gas when it is cooled, which creates a vacuum. When the gas is heated the gas expands and pushes against the piston and when the gas is cooled, the gas contracts and creates a vacuum and draws the power piston back into the cylinder.

[@asisobrasyservicios8660]

i don't understand how the regenerative cooling works. If Stirling is a closed system with Helium, the heat exchanger how obtains a new and colder temperature for fluid to cooling each cycle. Somebody can help me?

[@zzanzare]

the hot helium from the hot chamber goes through the regenerator, a metal sponge. The sponge heats up, while the gas cools down. When the cold gas enters the cold chamber, it shrinks, thereby pulling the power piston and generating movement. Since it has been pre-cooled by the regenerator, it shrinks more than without the regenerator. Then by the movement of the flywheel it is pushed back again through the regenerator, which is still warm from before. The cool gas is heated by the regenerator before entering the hot chamber and regenerator is cooled by it, ready to cool the gas again next time around. And the pre-heated gas in the hot chamber now expands more than if it wasn't pre-heated, thereby again pushing on the power piston and generating movement for you to use.

[@asisobrasyservicios8660]

Thanks for answer, i finally understand the movement. But i've another doubt now: the cold chamber reachs cryogenic temperatures? How does the piston to continue the movement? steel hasn't problem at that temperature? Thanks

[@zzanzare]

no, steel doesn't have problem with that.. also, there is only helium on the inside of the piston, no frost, since helium would take much much lower temperatures to freeze. I'm not sure how low this device can cool it, the air liquefication seems a bit extreme. But I've seen youtubers making hobby stirling engines doing -40 celsius no problem.

[@jrodriguez1374]

you seem pretty knowledgeable zzanzare, could you tell me 2 things if you dont mind? 1. how is the metal kept from overheating? i.e. this video explained most things pretty well but not how the piston would be lubricated in the chamber to prevent damage to the engine. 2. what metal specifically would be used as the metal sponge? I appreciate your time!

[@zzanzare]

haha, and that's where my knowledge has its limits ;-) I'm just a guy with technical background who is fascinated by stirling engines and watched almost all stirling engine youtube videos :-D I think that lubricating the piston and preventing the damage would be exactly the main magic that Philips would guard as their business secret, because that will make the difference between a useful product and a cool but impractical toy. Also, the cost of maintenance is one of the main reasons stirling engines are not used everywhere today - it seems it's pretty hard to do right.

[@GreatTutorialChannel]

Maybe Hans Zimmer should redo the intro music :)

[@BenyaminMentchale]

Genius!

[@blankblank2345]

wish i was born earlier

[@opts9]

steel wool type stuff..

[@hspark8850]

Heat Efficiency 40%?

[@Muonium1]

Carnot effciency

[@jonathondeeds3423]

Just 40% thermal efficiency?? Thats not too good, some modern Toyotas manage 41% thermal efficency

[@okelepoka]

40% those days was perfect. Imagine if it developed like other engines did in last years. There is still big potential in this engine

[@Morrigi192]

This video is probably at least 50 years old. 40% with the tech back then was way ahead of the curve.

[@anilkumarsharma1205]

are you able to drive the equation for heron's fountain also, so we got that free energy from atmospheric pressure forever for mankind's from it's fountain we drive a turbine from this fountain and that will give electricity which controlled the heron's fountain various parts and maintained the air and water flow by computer programming and we got free energy from atmospheric pressure forever for mankind's

[@20Djalma]

Vejo que há uma coisa nesse motor que ninguém ainda fez!

[@joaquimcaetano1717]

Djalma Antonio o que?

[@SOJACjac]

Ladies ;) 9:50

[@North7able]

9:56 ... I think, therefore I am.

[@preemalobo5072]

Please change the music in background at first

[@kateluvshugz]

10:04 cawk n balls lulz

[@jomast6248]

Tjieke dings!!!

[@feg466]

Who is here becoz of a cheap Swedish submarine sunk a billion dollars American aircraft carrier..😁

[@morritox]

alguien lo podria traducir al español? se le agradeciria infinitamente... saludos!

[@eduardogonzalezbelgeretto737]

+Jesus Alberto pone los subtitulos y despues en configuracion, traducir subtitulos, saludos

[@morritox]

Si lo hice pero hay cosas que se mal traducen

[@jsms1013]

aprende ingles xD

[@heylolsuplilololol6377]

Jajajaja