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ScientificClo
เข้าร่วมเมื่อ 9 มิ.ย. 2010
Thermo-Acoustic Engine
Inspired from a Glass tube Thermo-Accoustic Engine, I decided to build something bigger and more efficient. Here is my creation. Please feel free to leave feedback or any questions.
มุมมอง: 47 067
Is there any chance we can develop the idea commercially?
This is one of the best stirling engines designs I have ever seen on TH-cam. Could you provide more information like a section cut on a drawing with some rudimentary dimensions and explanation. I know the stroke and piston dia. but how does the rest come tiogether.
hello
Really want one with an end that can be shoved in a campfire
Brilliant engine.
Explain the differences and similarities between the thermo acoustic engine and a sterling engine. Any uses for them.
Couldn’t you use the output power to store power in some graphene battery to power the heater of the engine
I wonder if there real life applications for this when the heat source is low/no cost, such as sun light, or the outside radiator of a household AC
Backyard fire pit generator
Nostalgic yeah, when youtube was still full of garage diy and still worth the watch!
is this the same as a stirling engine? seems much more powerful than stirling engines i've seen. great job.
Not OP, but it's similar to a beta stirling engine but without the displacer. The air is displaced by acoustic waves in the cylinder.
Congratulations, for the workmanship of this engine. Please note that stating just the generated voltage is no indication of the power of the engine.
Nicely built engine, congrats. But a misleading video. You are putting more electrical energy in than would be needed to power the leds directly, the rest is wasted as heat. You should have said that, because some viewers may think that this is a good way of using electricity to power leds. It certainly isn't. At a rough guess, I reckon about 90% of the energy of the battery is being wasted as heat. The exercise is interesting and you've done it well, but maybe you should have been clearer about putting , say 100 watts in to get get 10 watts out.
can i purchase this model?
Why power it electrically at all? If you already got that sorta..you can never get more than what you feed it in this version, whereas a fuel based is rather a conversion from heat to movement
100 watts ? ?
Looks more like a classic Sterling engine.
Do you have a diagram? Can you show us
Excellent , congratulations. :)
Sorry, but this is not a thermoacoustic engine. You obviously don't know what a thermoacoustic engine is. This is just a conventional Stirling engine.
this is awesome. Even with that low wattage output, this is still a great generator. Think about it guys, A tea candle has an average of 40 watts of heat output for 4-5 hours. It would only take about 3 candles to rock this thing to charge your cellphone or tablet at only 1-3% efficiency !
Hello. Do you sell the construction plan?
Is the piston made of graphite or tungsten carbide? The latter might be better in terms of tensile strength. If refractory properties are desired then you should use tantalum carbide
it's a marvelous engine.Would you show the hot cylinder inside?
FAKE THERMO-ACOUSTIC ENGINE!!!
How acoustic?
100 watts in and a load of around 13.6 watts (according to "this math" www.horrorseek.com/home/halloween/wolfstone/Lighting/litlpo_PoweringLEDs.html a.k.a. 10ma current drain at 3.4 volts per LED) aren't encouraging compared to electric motors (if the load prediction is correct) but that's a nice piece of hardware to have in emergency situations,indeed! I wonder if that same 100 watt heat source has enough power for two of these fused together; if so,you've "destroyed" the oil-based competitors!
Electric motors are not a heat engine though, where will you get the electricity? Heat enginges take low grade energy(heat) and can convert it into high grade energy like mechanical and electrical energy :)
First of all, extremely brilliant...hats off, truly...actually I want to make one after watching this...could u help me do that?
Hi there, Are still online? because your last activity was some time ago. I´m doing research on the thermoacoustic engine because I want to take it to africa! so please let me know if you´re willing to have a serious exchange about it. Greetings V. Gyamfi (Name)
what is the voltage/current output?
Hi, I thought you were going to pursue another attempt at improving the engine?! And another video as I find your work inspiring ! Great job !
gr8 work... do you intend to release the plans :) ... alok.praveen@gmail.com
OMFG! Finally someone built a large one. I'm trying to convert a 4-stroke to a high compression lamina flow engine.
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i like that, do you have any plans available?
Hey, I am trying to figure out what the purpose of the engine is? It is taking more power to run it than it puts out. In my opinion it is just a transfer of power from elec. to motion . Wouldn't an electric motor be better? But if your interested in how to make this better then drop me an email at captain35744@yahoo.com
how this any different from a stirling?
There is only one piston and no displacer www.stirlingengines.org.uk/thermo/lamina.html th-cam.com/video/owbjLWrC86g/w-d-xo.html demonstrates the internal power of the device near the end
Very good! Congratulations!
engine has a nice sound
Hi ScientificClo. Great work. Can you give an update on your engine?
nice job,, Iv only put together a small lamina engine so far but have been wondering how viable it would be to scale it up.. Now iv seen this i think i may have to have a go .. Great Work
@ScientificClo, have you tried to charge the gas in the cylinder to a higher pressure and see if you can get more power out of the engine? Have you measure the efficiency of the engine?
@ScientificClo, have you tried to charge the gas in the cylinder to a higher pressure and see if you can get more power out of the engine?
This is the best engine I have seen. I am working on a similar design except that it works like a two stroke engine with external combustion.
@ThePowertoolChef I don't think he is using any stack. A so called thermoacoustic engine essentially works like a 2 stroke engine with external combustion so the air in the cylinder is reused with some heat removed by the cold end. Power density is inversely to efficiency. The more heat removed by the cold end, the greater the power output and lower efficiency.
awsome
Hey ScientificClo , Great vid of an even greater machine. Verry inspiring would really like to how manny amps the leds are drawing or what resistance they have so we could calculate power output and effienciencie. Does this engine have a restrictor ?? does it have a narrow hole between hot and cold side ?? If so, can you please give the dimensions. Last, does it run without crank or did you never tried this ?? Manny thnx for the vid !! Keep em coming !1
This is the largest thermoacoustic engine I have seen yet. Great job! What are you using for a stack or regenerator? Is there a restricting hole? Is the cold spot critical?
Do you know the answer all these years later?
Hello, A marvellous achievement indeed, congratulations. Perhaps you could answer a couple of questions? You heat your cylinder on the end as is done on a regular stirling engine; yet all demonstration glass tube engines are heated near the middle of the cylinder. Would you mind explaining this? What kind of packing or regenerator do you use, if any? Have you measured the electrical power output of your engine? Thank you very much for your answers.
Great work against mechanical friction! -Have you measured actual temperatures yet? -Do you think that grooves on the piston walls are acting as gaseous piston rings? -Is the hot cap flat or filled with regenerator? -Is there empty space between regenerator and hot cap - like resonator space? I would try to increase thermal conduction on the hot cap and it´s internal surface area. There seemes to be no "glogging" with alternator - Is it with rotating PM´s without iron around coil or coils?
A thermoacoustic engine can theoretically run as fast as the standing acoustic wave it generates. Friction and inertia are the only thing which limit this.