Thermo Acoustic Stirling Engine - Simply Genius (4K)

This is a single piston thermo-acoustic alpha(1) Stirling where 1 piston performs both fuctions of displacer and power piston.Compared to a low-temperature difference gamma(2) Stirling engine.
I was not clear on this point, THIS Stirling engine uses atmospheric pressure to boost its power, BUT if the piston were gas-tight, it would work in a vacuum.
How it works, gamma Stirling engine: • Stirling Engine - How ...
Today I was running it on 99% isopropyl alcohol. I've found it carbon ups the tube much more than 99% ethanol (but it's a LOT cheaper!)
OTHER STIRLING ENGINE VIDEOS:
Thermoacoustic Alpha: • Thermo Acoustic Stirli...
High Temperature Gamma: • Stirling Engine - High...
Gamma Low Temperature: • Stirling Engine - Low ...
Gamma Walking Beam: • Stirling Engine w/ Gen...
Showing Power Output: • Stirling Engine w/ Gen...
SOURCES
(1) ChatGPT
Swift, G. W. (2002). Thermoacoustic engines. Journal of the Acoustical Society of America, 111(5), 1872-1923.
Hofler, T. J. (2018). Classification of Stirling engines. In Handbook of Stirling engine (pp. 55-73). Woodhead Publishing.
Backhaus, S., & Swift, G. W. (1999). Theory of thermoacoustic engine. Journal of the Acoustical Society of America, 105(1), 251-274.
Wang, J., Liu, Y., & Wu, H. (2016). A review on the development of thermoacoustic Stirling engines. Renewable and Sustainable Energy Reviews, 58, 1098-1107.
(2) www.ohio.edu/mechanical/stirl...
WARNING: Hot parts, open flame, flammable liquids. Danger of fire and burns. Not for children. This model vibrates badly and the fuel can gets way too hot. Use proper precaution. If you don't know, learn first or do not do it.

[@franciskimathi5415]

Definitely worth a sub... 🎉Awesome stuff

[@tsbrownie]

Thanks.

[@erikrobillard6950]

iv never seen one spin fast like this one

[@3847CAK]

You need to use denatured alcohol of at least 200 proof. It burns a lot cleaner and will not tarnish the tube.

[@djmips]

I feel like a pressurized fuel burner that uses a hand pump for pressureizing (like a camp stove) and the appropriate built in pre-heat and jet size would burn the 99% isopropyl alcohol cleanly. Would be an interesting experiment.

[@tsbrownie]

I've been thinking about using a solar panel to heat a resistor to drive one. They can use any kind of heat source, including waste heat, so it leads to a lot of interesting (and bizarre) possibilities!

[@MNCPMSteve]

That's the coolest like model engine I've seen in many years. Thanks for sharing. I'm guessing these are not that great for producing much power 🤔? Certainly gets the revs up. Lookout rotary engines 😜

[@tsbrownie]

You are right. They are NOT torque monsters. They are really good at working on waste heat. I have another that will run on hot water and some people have tuned them to run on body heat!

[@MNCPMSteve]

@@tsbrownie remarkable!!! 😎

[@comment1119]

Do you think it would be possible to charge a phone with the outout voltage? Im thinking of using it as like a mini generator on Camping trips.

[@tsbrownie]

I did this video with another type kzbin.info/www/bejne/mIvUc5KnrKmVp6s and found it only made about 0.12 watts. My phone takes hours to charge with a 20 watt charger which is 167 times more. So it's not really practical. If you google "camp fire generator" you can find lots of them, but most are bogus.

[@Spicy34567]

Hi i have a stirling engine like this but not exactly same. Somehow the piston broke. Where can i find parts of the stirling engine

[@tsbrownie]

I have never seen any place to buy parts. I have seen videos of people who make these from scratch, and some use a graphite piston.

[@strings1955]

Any kind of application with Solar as heat source?

[@tsbrownie]

I have seen someone run one of these using a fresnel lens and the sun, but they had trouble tracking the sun. I have an idea for a different implementation, I need to get around to that.

[@antoniaydin]

Question how does the piston seals? Does it have a o-ring? Amd is the 2 piston version more efficiënt?

[@tsbrownie]

The piston is close fitted only, no seals. I don't have any information on efficiency of the various models. I would guess the low temperature ones are more efficient than the high temperature ones.

[@lllcinematography]

what blew out the flame at 6:16

[@tsbrownie]

Me. The burner was vibrating off.

[@Dushyantgiri]

How is this working on thermo acoustic concept.. This just normal theomodynamics doesn't related to acoustic waves

[@tsbrownie]

I'm not sure. Many names in science have a history to them. Radioactive materials don't have anything to do with radios, and gamma does not produce static on a typical radio. My best guess is that there is a oscillating gas pressure differential similar to sound waves in the wild. It was invented in 1816, so....

[@Dushyantgiri]

@@tsbrownie where we can find it is possible text book explanation ie such as engine efficiency equation and more details on it

[@tsbrownie]

@@Dushyantgiri I turned to chatgpt and asked for a list of scholarly pubs on stirling engines. Here's what it gave me. Books: "Stirling Cycle Engines: Inner Workings and Design" by James R. Senft "Stirling Engine Manual" by James G. Rizzo "The Stirling Engine Manual" by William R. Martini Journal Articles: "A Review of Stirling Engines" by Ibrahim M. S. Ismail, Renewable and Sustainable Energy Reviews, 2013. "Stirling Engine Analysis" by R. A. Waldo, Journal of Engineering for Power, 1963. "Recent Progress in Stirling Engines" by C. O. Hertzberg, Journal of Energy Resources Technology, 1988. Review Papers: "Stirling engine: An overview" by H. R. Nourbakhsh, Renewable and Sustainable Energy Reviews, 2009. "Review of Stirling Engine Heat Transfer" by G. N. Mueller, Journal of Energy Resources Technology, 1988. Conference Papers: "Development of a High-Efficiency Stirling Engine" by K. S. Novak and P. F. Lawlor, Proceedings of the ASME International Mechanical Engineering Congress and Exposition, 2002. "Stirling Engine Design Manual" by Allan J. Organ, Proceedings of the ASME Winter Annual Meeting, 1982. Theses and Dissertations: "Design and Optimization of Stirling Engines" by John A. Doe, PhD Dissertation, University of XYZ, 20XX. "Experimental Investigation of Heat Transfer in Stirling Engines" by Jane B. Smith, Master's Thesis, ABC University, 20XX. Research Organizations and Websites: International Stirling Engine Conference (ISEC): Provides proceedings and information from the conferences. NASA Glenn Research Center - Stirling Technology: Offers research and development information on Stirling engines.

[@brianb-p6586]

Yes, it is the oscillating gas pressure and you also had the answer correct in another comment,@@tsbrownie: "there's a pressure wave bouncing back and forth inside the tube and pressure waves in a gas is "sound", i.e. acoustic." Radioactive means producing radiation. "Radio" as a device is a device which work with radiated electromagnetic energy... so, yes, they are both related to radiation, although radiation from different sources.

[@brianb-p6586]

@@tsbrownie ChatGPT is good mostly for making up stuff that looks plausible. In this case a more useful result comes from a simple Google search for the term of interest, which is "thermoacoustic Stirling engine". When I did this your video was the first video result 🙂, and useful articles followed. These are not specifically Stirling engines (unless you consider some part of the device to be a regenerator, which is a required component of a Stirling), so "thermoacoustic heat engine" is a better general term, and there is a Wikipedia page by that title... good reading material. Thermoacoustic devices are also mentioned in Wikipedia's Stirling engine article.

[@narujohn6984]

Why is it called "acoustic"?

[@tsbrownie]

I've had that same question. From what I have read, it's because there's a pressure wave bouncing back and forth inside the tube and pressure waves in a gas is "sound", i.e. acoustic.

[@Rctdcttecededtef]

Think they knew about this in ancient times? Some ancient alien type shiet

[@tsbrownie]

Romans had an internal combustion engine that was fed by a person. There's very little info on it and I know about it from a tech history professor.