Hello, I really like your educational videos, I appreciate the work you put in, I have already described this to you several times. I would like to draw your attention to a very important thing again, that you must indicate the source of images and video parts downloaded from the Internet and used in your video or in the description! This turbine-generator idea was the solution of the autodidact Kees de Blok, the greatest mind in thermoacoustics, approx a decade ago. I think the background informations are interesting also as, the technical issues of the replication. But anyway, this is an impressive video series! Thanks to started to share it! BLADE

Would not simple magnetic piston inside a coil be much more effective way to gather the energy?

powering it with solar concentrators would be cool

This channel is great!

Is the main goal of this project to make a heat engine that anyone can build for educational purposes, or because you expect a situation in the future where quality parts can't be sourced and shipped, and this design must be made in an ad hoc off-grid manner? Once your development gets to a certain point, you might find better results working with a fabricator that offers CNC, 3d printing, and plastic forming services to dropship kits to supporters. Shipping is very reliable. Are all your followers avid makers and home fabricators? There may be people who are very interested in assembling an engine as part of a project but aren't so interested in fabrication by themselves or whose living situation restricts them. A poll in your youtube community tab could be very interesting to collect such information on your followers.

Verry interesting 👍

❤

What is the estimated power output of your engine?

Where can I buy the book: „Introduction to Thermoacoustic Stirling Engines”?

To prevent the blades from warping, in CAD add a thin ring, maybe 5 mm wide by 2 layers tall, connecting the very tips of the blades.

Great work! Maybe printing on a raft will help.

please do note that when working with carbon fiber filament you should take the same precautions as when working with glass fiber or carbon fiber sheets, as the fibers shed from the filament from handling and embedd in skin, lungs, etc

Wow, an acoustic striling engine that drives a turbine, brilliant! 😃😃

i'm wondering if you could print using ABS/ASA and smooth it using acetone.

If you want to heat the machine from the outside, then the diameter of the machine can be approx. max. 25 mm. In order to have usable energy output, however, the dimensions of the machine would have to be increased. You won't know, because if you want to use a larger pipe diameter, then the heat exchange will not work with a larger pipe diameter. Therefore, it would be worth building a machine with more cores, but TASHE is not very good, and in a simple multi-core version. It is much easier to make a multi-core standing wave machine, e.g. like this. kzbin.info/www/bejne/nXSmko2tgrCLbcU This is the simplest and most magnificent design. You can use up to three, four, or even more cores, and thus its performance will be higher even if the efficiency of the standing wave machine is lower than that of the TASHE. Let's say I don't find it convincing that the Tashe is much more efficient than the standing wave machine in power generation mode. As a cooling machine, yes, but not so much in power generation mode. Instead of Tashe, it's worth building a standing wave machine, instead of a two-way turbine, a one-way one, although it needs to be put in a larger tank to be good. At least that's what I think...

You can use either a felt tip pen or pva glue (I use a glue-stick) as a cheap interface layer to help raft/support removal. Edit: I mixed up raft and brim 😅

stupid idea: your turbine is symmetrical. add a second mirrored acustic loop.

Nice! I see now why your print looked like a reaction turbine to me in the still images, it was not the turbine but its nozzle (or Inlet guide vanes, if you prefer) It will be quite interesting to get a sense of how this turbine behaves. Usually an impulse turbine is designed so that the tangential velocity of gases leaving the turbine wheel is as close to zero as possible. However given the need for nozzles on both sides for bidirectional operation, this condition would in your turbine cause poor flow out of the exit (as the downstream nozzles will be at a very steep angle to the oncoming flow, operating "stalled" essentially). I expect your optimal shaft speed will be lower as a result. It is sadly quite hard to make an efficient turbine on small scales, the tip clearances and boundary layer drag are much more significant in smaller machines. With the 3D printed parts you will definitely want to sand the surfaces smooth, and figure out how tight you can make the tip clearances on the turbine wheel.

I follow your progress with great interest. It's a pity that I can't suggest anything sensible. Regards

I believe it is a great idea. The external heat source required by the Stirling enables the use of a completely sealed container for the working fluid, which means high-pressure gas can be used, which means better efficiency and power density. Watching your video gave me an idea about how to solve the vibration problem with minimal losses.

I would like to help, i think the best first steps would be a git repository as a central documentation area and to disassemble the big problem in smalls so that everybody can have a look at the smaller problems and think about an solution.

It's mostly a piston moving up and down. Can it be done to create electricity by putting magnets on the piston and a metal coil around it? So the sterling engine becomes the generator itself? This way you skip all the mechanics, that take power away

This is another level of DIY. Looks a lot of work. Amazing.

Did you try to use heat pump as heat source?

How did you get into engines? It seems like you're very knowledgeable on how to build a nice engine. I'd like to learn also. I'm a fullstack software developer so I'm familiar with the technology which is used for planning this. Though I have no clue how to build one. I'm also wondering what the wattage and voltage of this is. Or an engine similar to it.

splendid. Really impressive

This is some amazing design, engineering and fabrication skills. Can't wait to see how it progresses.

Would anyone happen to know where to get the book mentioned on 0:28? I am not able to find a seller on the internet.... Regards

In principle, you could design a thermoacoustic engine using He, and ionize the He to extract electric energy without moving parts since you will have moving charges due to the acoustic waves. I don't assume this would be efficient, but it's a novel approach to the 0 moving parts problem.

Thermoacoustic will be loud, right?

I imagine that today, using digital control systems and modern materials, this could be simplified quite a bit. I suspect the whole feedback system can be offloaded to a something like an arduino. Perhaps even the metal spring could be replaced with something simpler when active control is used with the linear generator. Just some thoughts.

Have you any CAD plans to build one of these engines? I've only the old ST05G Engine plans, but it's difficult to produce a new engine with this old plan's. I'like your rhombic drive engine.

Hi

wie kommt die notwendige Phasenverschiebung bei dieser Maschine zustande? Meiner Meinung nach ist der Loop bei diesem Typ unnötig. Ein reines Sackvolumen auf der linken Seite leistet das Gleiche. Wenn der Kolben nach links fährt, dann muss bereits der Druck abgesunken, bzw. das Gas abgekühlt sein. Aber bei dieser Maschine ergibt sich das Abkühlen erst, wenn der Kolben nach links fährt und das heiße Gas im Kolben durch den Regenerator drückt. Dadurch ist die Phasenverschiebung nicht mehr nahe 90 Grad sondern bestenfalls bei 45 Grad. Dann wozu der Loop? Wenn das Gas weiter umschwingt, wenn der Kolben schon im O.T. ist (das ermöglicht ja der geschlossene Loop wenn man der Luftsäule eine gewisse Massenträgheit zugesteht), dann kühlt sich das Gas noch weiter ab, aber das ist ja gar nicht erwünscht! Wenn der Kolben im O.T. ist, dann muss das Gas wieder auf die heiße Seite umschwingen damit der Druck steigt. Und das wird bei dieser Konstruktion durch nichts bewirkt. Dito verhält es sich wenn der Kolben abwärts, also nach rechts fährt. Dann wird der gerade Weg durch das T-Stück der bevorzuge Weg sein. Zwar steigt dann endlich der Druck ein wenig an weil die Luftsäule im Loop bevorzugt entgegen dem Uhrzeigersinn schwingt. Aber wenn der Kolben unten ankommt schwingt die Luft weiter um und heizt das Gas weiter auf. Aber es sollte doch abkühlen, was es aber nicht tut. Deshalb wird diese Maschine niemals einen sinnvollen Wirkungsgrad haben. Bestenfalls 0,2% oder so ähnlich. Auf 1% kommt man damit schon mal nicht. Dann: die Schläuche aus elastischem Kunststoff schlucken Energie, weil sie auf die Druckänderungen im System reagieren. Das senkt den Wirkungsgrad weiter ab. Diese Konstruktion ist aus meiner Sicht ein dead end.

You approached the issue very professionally

Where can I get the book and the components, please guide me.....

I don't understand how the part is clamped around 05:30 and beyond. It looks like magic.

I don't have any metal fabrication at home beyond hand tools like vises, hacksaws, drills, and files. So I order CNC machined and DMLS printed parts at providers such as Parts Badger (U.S.), Xometry (EMEA), and Protolabs.

This guy took stirling engines to another level

Now I understand why Shane Pomeroy is so obsessed with the diaphragms on this Stirling engine (he started out with normal pistons and a horizontal Alpha configuration).