How to disassemble a 1kW Free Piston Stirling Engine Generator
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- Опубліковано 26 січ 2017
- #freepistonstirlingengine, #stirlinggenerator, #stirlingengine, #mchp, #heatandpower, #renewableenergy, #externalcombustionengine, #bladeattila
How to disassemble a 1kW Free Piston Stirling Engine Generator
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The unit cames from a Rinnai micro CHP system. The original patent of Free Piston Stirling Engine Generator came from Sunpower. Later the Microgen started to manufacture the micro CHP system with this 1kw Stirling Engine Generator.
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The Hungarian Stirling Community disassembled a whole unit.
Big thanks to Péter Hizsák, who bought the engine and shared with us!!! :)
www.microchap.info/stirling_en...
Check the 3rd column Infinia with Rinnai, Bosh 1kW engine this is it!
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![[TUTORIAL] Free Piston Stirling Engine /NASA type/ - 2020 Updated version disassembling](http://i.ytimg.com/vi/iAu4as9fRNo/mqdefault.jpg)
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I think I learned more about free piston Stirling engines from you answering questions than half a dozen articles I read, thanks for your knowledge.
Your welcome! Thanks for your kind words! BLADE
I used to work for Microgen UK, who bought the Sunpower patents and developed this engine into a compact unit for domestic gas boilers. The two piston spring packs were replaced with a magnetic spring and a stiffer gas spring, so the piston was truly free. This shortened the engine greatly.
@Will Swift Probably he means the auto-centering linear motor according to US6483207
Tell me about microgen UK product, specification and price list please
@@brehcsif thanks dude! Now that the patent has expired we can make it for our own use and even sell it to our neigbours
@@absolute___zero No problem, we can share the profit 😉 By the way, another patent that might explain the magnetic spring is US 2009/0001823 A1
Fantastic! I ever expected to see one AFP Sunpower like Stirling Engine disassembled ad you give this satisfaction to me and all people interested in this kind of Stirling topology. Very, very thanks for sharing this information!
No problem! Your welcome! :)
Absolutely fantastic! Appreciate the sharing and keep up the great work Blade!
Conscious Energies Thanks very much!!!!! :)
Wow! Thanks for this and all your other incredible videos!
Your welcome! :) Thanks for your watching, I hope my other videos will be interesting also to You as the new ones. BLADE
Thanks for the video! OK - I get it - this is a Sunpower Stirling, and they used a Shinko magnetic actuator as the generator.
I hope these guys know & understand that this is a work of very high precision machine to achieve such design & manufacture those precise designs into production. I am just blown off my mind only looking at the pieces being dismantled. Who the heck designed & who on top of that heck made it possible on machines that are out of reach for even an experienced expert CNC machine shop. Really seems out of this world model.
I wonder why you think ths is out of reach for a cnc machinist if he know how to operate the lathe properly.
@@dantronics1682 very hard to find proper CNC machinist....secondly the machines themselves if Hauss / Deckle Maho then yes these are good machines but nowadays even some popular EU brands have started getting parts overseas to make it competitive and don't care if tolerence is more than 0.01mm.... we need machines with 0.001mm (0.00001") tolerences to achieve high accuracy on jobs. But who cares nowadays ...... the more wider tolerence the better...... more frequent business...... lol....
Very interesting, thank you for sharing :)
Your welcome Maestro! :)
It's like a free piston cryocooler in reverse. Cool 😎
Yep, but there the regenerator material is different, because of the low temperature.
Bravo........I'm alwise amazing when u take a Sterling apart........u say that's it........hmmmm........physics ........love it.....cheers
Great design
Certainly come along way since the original 1800s designs.
Yep, this is a professional design from Japan. Precisely high end level manufactured parts in it. Not so cheap unfortunately. I hope it will be soon... BLADE
How many kWh does it generate and do you have any ideas about it's cost approximately please?
I see this so late...where were you all this time!!..great video!
:) That's a good question, but I've been here I guess! :) Thanks you very much! This is a bit "dense" with my friends who all wanted to see what will be inside. But it was professional as possible. :)
EXCELLENT VIDEO !!!
Thank you very much! It was a team work actually but I'm really happy I could share it with others! Best regards! BLADE
Brilliant, nice one
"Really heavy parts".
Reminds me of Tesla's 'earthquake machine', a free piston generator powered by steam.
And since you normally can't just stop a closed free piston stirling, especially when it's massive and heavy - keep vibrations in mind!
Yep, the engine has a resonatly coupled balancer mass around the engine. That is moves opposite as the engine moves, so the average resonance will be low. The whole unit is really quiet when it's working. ;)
Great tnx !
Rob Kersten Your welcome! :)
so cool
Very interesting and useful!
Please give some information about the sealing used in the engine
thanks
C shaped beryllium copper spring-ring is the gas sealer.
wow, they spared no expense on this engine. High-end tech all the way!@@AttilaBlade
this is realy cool...
Andon Rangelov Yep, it was! Thanks your comment!
Could You write a couple of words about the balancer and springs, please? What do they do?
Thank You for this video. You're a great source of inspiration!
OleTC Hi there, the balancer reduce the whole engines resonant. The inner moving masses alternate, so the spring-mass outside moving freely but opposite as the overall inertia from the moving parts. The engine could work so smooth with it also silence.
The stirling engine was pretty much perfected around 1990 onwards..
Due to it's versatility and with the world focusing on no emission technology they are making a comeback...
Efficiency is not always the desired outcome for a sterling engine depending on the application...
Helium as the working gas and using the generator as a starter motor as sterling engines can be fickle at start-up are two relatively new innovations...
Yep, you've right, but for the best weight/power ratio we should planning the high as possible efficient engine. The developements are going today too, lot of research lab working on it around the world, but not so popular and opened. BLADE
Good Morning! I really liked your project... Which gas did you use as a working fluid?
The original unit worked with Helium. The plan was to fill up again with that.
Wow ! I have wanted to see the inside of a Sunpower engine for 30 year!
The Green coating on the Power Piston looks like a PTFE Heat Shrink tube.
Can you tell if the Green Teflon coating was painted on or thin tubing or any more about it ?
Hi James! The material is a high grade one they called Rulon. It's looks like they made a thicker coating first, after finalised it for the perfect diameter.
So you feel the Rulon is a Painted coating ?
The reason I ask is that it looks so even on the end, like it is Shrink Wrapped. I use a Hard Anodized piston on my 2" engines, but I still need a drop of WD-40 to reduce friction.
The green coating is probably Xylan®. The usage for stirling power pistons is for example described in a freely available NASA paper with the title "Advanced Stirling Convertor (ASC) Technology Maturation".
Is the white material in the heater cap still intact? Not that I know what it is supposed to look like, but it looks broken up. Was the engine taken apart out of curiosity or for maintenance reasons? Ive always been fascinated by this design considering that I would have no idea what part would break down first, if any; but did it?
The white piece is the heat insulator. That wasn't broken just old...something Calcium based silicate I think. We've been curious about the inner structure. The unit will works again when it will fill up with 30 bar of Helium. It wasn't break, just unused, because the owner wanted to buy a bigger one 2.5kW unit.
Did you test it out before taking this generator apart? Any info would be nice and the efficiency of converting BTU"s to kw-hrs. Question can this be improved on?
No, I didn't! That wasn't my engine, I was the leader of the disassembling process here with the owner of this engine. The engine worked in a micro-CHP system and produced 1kW electricity from the gas burner's heat. www.microchap.info/stirling_engine.htm Check the 3rd column Infinia with Rinnai, Bosh 1kW engine
Hello Blade :) Very Thanks for this Very Educational Video 👍👍👍 I know now what You meant by "high tech" and "very precisely made" ;-) I'll will share it on my fbk immediately and to my friend in Canada :) Best Regards, Didier.
Didier Khwartz Thanks very much! And it was filled with 30 bar Helium originally. So, not an easy way to build one kW generator Stirling.
Atikám ismerős a helyszín és a többi :D
András Gazdag Még jó! :) Köszi a képeket, videókat maistro! Két éve meg kellett volna csinálnom, de legalább nosztalgiázunk! :)
András Gazdag Ja, meg persze a helyszínt!!! :)
Muito Legal! 8)
Muito obrigado! :) Espero ver vocês aqui no meu próximo vídeo também! Saudações da Hungria! BLADE
Can anyone explain what makes the displacer move without the crank shaft found in other stirling engines? Thanks
Yes, the pressure changes. We have two pistons with different diameter. The bigger diameter piston moves first, the smaller after. It gives a phase different as the crankshaft. The smaller connected to the displacer.
which fields are filled with helium? have any idea?
stirling area or full inside?
The full closed area inside filled with high pressure Helium. It makes gas bearing for linear rods also create some cooling to the generator or motor side's coils. Also it makes a bouncing volume after the pistons as a gas spring.
A few questions for you if you get the time, when the DP is at the very bottom of its stroke does it momentarily cut working fluid flow between the PP and the cooling area next to the DP?
Also what limits the stroke of the PP and the DP? Do they come to a hard stop or stop short reaching the planar springs limit?
Also did you get a look at the seals used on the flanges? Flat seals or ring seals in a groove?
The flange sealing was a brass-like spring-ring with special shape that I never seen. It could change the shape with the tightening process. Looked like a C cross section where the opened part looks inside where the pressure is higher. The pistons has sinusoidal movements, no hard stops. Inside the displacer has a collected flat spring section to hold that in the center.
@AttilaBlade thanks for a speedy reply I appreciate it, the gasket could be a 'spiral wound gasket' used with standard ASME high pressure flanges.
Yes, you've right! Did you work with it?
@AttilaBlade My line of work is in orbital pipe welding, I repair various pipe cutting and orbital tig welding equipment very expensive gear. This has exposed me to a lot of pipes flanges and gaskets, I am trying to figure a way to build a stirling engine using this equipment.
@@bojangles2492 Hmmm, OTW is a pretty good segment of the weldings. In the high pressure area I seen some Pulse Tube Cryocoolers from RIX they used welded pressure vessels around they linear reciproc motors. That is a cheaper and lighter in mass production.
Fantastis
Thanks! :)
Do you have an idea if this works for normal air and the efficiency if at all it does run.
This question is not easy to answer. In the Helium 3 times faster the sound, the thermal properties much better than air. If you want the cheapest but good solution than use Argon under pressure, but the Heat exchanger won't be ideal for that conditions. This engine works well with pressurised Helium because it was developed for that and relative high temperature on the hot side. Anther thing is the gas bearing technology what they used. That is not working well without pressure or maybe the gap won't be ideal for air. So the answer is not easy.
@@AttilaBlade This engine definitely doesn't has a gas bearing but simply a precisely aligned clearance seal. A gas bearing is self-centering and therefore the piston needs a certain degree of freedom in radial direction. However, in this case the position of the piston is fixed by the flexure bearings on both sides. Newer Sunpower engines allow movement of the power piston by replacing flexure bearings with gas and magnetic springs (as Rob Bolwell describes above). The displacer piston can be decoupled from the flexure bearings in radial direction by using a long and flexible piston rod inside a sleeve that slides in the central bore of the power piston (well illustrated in US7827789B2).
@@brehcsif These infos are partially roght, because the gas bearing as an effect could work without adjusted direct gas flow. The precisely aligned clearance seal here is not a simple clearance seal. The grooves are works as vortex generator when it moves back and forth in the 30bar pressurised gas. Also the planar spring twist/spin the piston a bit in every cycle two times what the piston does. I know what do you mean as a real gas bearing technology, but this effect works here too without forced gas flow in dedicated gas paths. I really like that solutions and technology to reduce the friction. Now I like the surface modifications to create same effect without complicated paths. Anyway, thanks for your meaningful post alsi thanks for the patent! BLADE
❤❤❤❤❤❤
Hi, what is the white stuff in the heater cap? Insulation?
Coco Mbella It looks like ceramic refractory for the heater coils. So yes, I believe thats an insulator.
Coco Mbella Hi there, yep insulator, Ca-silicate I think.
Hello, Do you have a detailed report on this engine if you can share. Need some help. Cheers
I haven't got any detailed report from this engine, but originally it worked in a 24kW gas heated micro CHP. So the electric part generated near by 1kW electric energy. The other section heated the water for daily usage also warm up the house.
I wish I had a small free piston gen to work with the stove when the power is out.
Travis, what do you mean "small"?
@@AttilaBlade Something that I can set on the wood stove, pour water on the top or water container for the cooling and make about 500 watts for the TV, computer, or dehumidifier.
Unbelivable
Powered by Sergey Yep, it is! :) We were suprised too!
Hi . Very imprecive . Can you please help with this question in my mind . I watched the video 100 times . I dident understand where the displacer springs are???? . I mean the plate springs. I saw the 2 rack of springs for the power piston . One near the actual power piston at the biginig of the power piston rad and one at the end of the power piston rad at the end of the actual generator . But where are the displacer pistons springs ?????
The displacer is one of the complicated parts of this Stirling. The springs are inside the displacer: old.clanstirling.org/upload2006/stirling.gif check this GIF to understand the engine's geometry! Thanks for your comment! Kind regards! BLADE
@@AttilaBlade hi thank you so much for the response . I glad that you see my notes . I was afrade that you,ll never see them . Can I have your Email . And send you my general sketch that I draw out of this engine . I made a 2D sketch out of it . I signed so many models before on my one thinking of free piston Stirling engins but there is a thing about what you are saying . If it is thou the displacer must be hallow and the displacer spring must fit in somewhere inside Az the gif . But the displaser looked like it's too small and too solid for this perpos . Any way can I have your Email so we can coaporate more that way . Or maybe Instagram id or something ?. And again thank you so much for the response 🙂
@@AttilaBlade and what is the white material under the copper regenerator . Ooo and you said in the video that this core is water jaket but I really think that this is the regenerator of the engine that the gas passes throu it 🤔
@@AttilaBlade and thank you so much by the link you sent me but unfortunately it doesn't open it . It says the owner of this website just doesn't allow ....
@@AttilaBlade I was so interested about the ticknes is the springs and what is it made of . And the radiation of the displacer springs and power piston spring . And the fact that do you think that the sum of all displacer spring is pusibly equal to the sum of power piston,s springs ? . Sorry that im asking alot 😅. That's why I wanted to have you on one of the other possible susial mediya like what's app telegram insta or even email 😅
What’s the rpm for the full 1 kw of power?
It has a linear reciproc alternator around 50-60Hz.
I have the impression that they have used your solution
Lechoslowianin Oh no, they made everything much earlier than me. I'm only a big fan of the hot air engines. ;)
that you too much for the video . I impress so so much my that . I'm student and I'm also working on building one one these engines . can you please give some more information . I don't know like the wight of the displacer piston and power piston. the lengths . or maybe the link for the source company maybe some drawings ....
Dear Farhad, The engine wasn't mine, all of the measured parts are in the video. But if you want to build a school project with more simple version of this, just check my tutorial video for cheap and easy to build NASA Stirling engine!
I'd love to work on these things myself. I wasted my life I think. I'm on the liver transplant list and I love tech. I build gaming computers. I just wish I could work with tech like thjis
I wish you all the best! I think me too, but I started it autodidakt more then 13 years ago... This unit is unfortunately not my design, this is a professional unit from Japan. I think this technology is perfectly usable in the 21st century but the price too high yet. If people will start to leran deeply this technology in school from the first class to university, then 10 years after we will happy with a generator, or heat pump in every home with an acceptable price... but actually people are not so interesting about this technology deeply enough to build high power units, just the desktop engines. Also those materials and manufacturing technologies are expensive today. BLADE
Very cool! What is the price of this engine?
I'm not pretty shure about it, but if I'm correct than my friends bought it about 800€ in used condition without boiler parts also no Helium in.
@Will Swift easier to leak, and potential for metal embrittlement, explosive if it escapes, etc. Hydrogen embrittlement is a problem mostly for high strength steels, aluminum alloys, and titanium alloys. A steel container filled with 30 Bar of hydrogen is not something you want to be keeping in your utility room.
Mennyi egyébként a motor hatásfoka?
Parabola tükörrel vagy valami egyéb hőforrással ki lett próbálva?
Ádám Patonai Ez egy házi, gázüzemű CHP-ből kiszerelt, generátorként funkcionáló Stirling beta. Egyébként 30 bar Heliummal töltött eredetileg, és 1kW teljesítményt ad elektromosan. Egyelőre nem volt egyéb módon tesztelve.
Miből lett kiszerelve ha szabad kérdeznem ?
Ádám Patonai Ezt megírtam a másik hsz-nél.
Where can we get one?
This unit came from ebay as a disassembled CHP system.
Beautiful but what is the song name?
Ohh, I'm sorry! I don't really know, it was a stock music unfortunately!
Asbestos inside?
No, that is Ca-silicate!
Tell me for order this product please
I can't share any link unfortunately for this, because it is not a product actually. This 1kW unit is a part from a micro CHP system. Included to a 24kW gas boiler heater. It eas a used Stirling FPSE generator that my buddy bough from ebay without Helium.
4:35
CR-Z tamamo Those are the stator coils of the generator.
A very complicated piece of work.
Is that complicated? One of the highest efficient Stirling on the planet. Brilliant works of engineers.
@@AttilaBlade Yes, it is a very complicated design with extreme precision fitting of parts, unlike the "hobbyist coffee can" Stirling engines. As for the power, compare it to a few solar panels or a small 2-stroke chainsaw engine which can produce twice the power, although at low efficiency.
I realize that, for a stationary application, an engine does not have to be compact as it does on a chainsaw, but this Stirling is not big and cheap and clunky, it is big and expensive and complicated.
@@codetech5598 Yep! It isn't possible quality for us, but good to see it's not impossible to make. I think the TA engines are more usable as homemade, garage engines. Aster type generator or cooler is a good construction. It could be made from cheap materials, parts. But you know, the engineering time, and knowledge isn't a skippable part. :)
What will be the cost of this device
Dr A M Nagaraj Hi there, this is not my engine, it is a part of a micro-CHP for a house. The cost is few 1000$ if you wanna buy one for your house. This is an older, used Stirling generator from a scrapped boiler.
Dear Sir
This engine is required for studies to one of the college where i am presently working as professor The name of the college is Sanjay Ghodawat Group of Institutions, Atigre, Maharashtra, India. Please do consider at concessional prince for this engine.
with regards
Dear Dr A M Nagaraj I answered 2 weeks ago for you it wasn't mine. My friend bought an old Stirling based CHP boiler from the internet. I can't help you too much! I'm so sorry! Attila
ufo technology
4%efficency
@@richardpaulson8954
loool
What??? :D Sorry Richard, but here we have around 30% heat to electrical efficiency here!!!
What was you doing?
I've been the leader of the disassembling process.
@@AttilaBlade why wasn’t you filming that properly??
Nothing visual properly
2023 and you still cant find these in any mass produced products. Why is that?
This Free Piston Stirling Generator is the heart of a mass produced CHP system more than a decade ago. I found it. I disassembled it for you. I don't understand your problem...
There is no such word as disassemble. The correct word is dismantle.
Thank you for the correction! :)
disassemble
verb
dis·as·sem·ble ˌdis-ə-ˈsem-bəl
disassembled; disassembling; disassembles
Synonyms of disassemble
transitive verb
: to take apart
disassemble a watch
intransitive verb
1
: to come apart
the frame disassembles into sections
2
: DISPERSE, SCATTER
the crowd began to disassemble
1kw my ass..maybe 20 watts if your lucky.
Your ass makes several watts only when you sleep, and when you are active then under a hundred watts. This unit an original 1kW generator from a home CHP system so... Your welcome! ;)
can you rebuild it please ?