Stirlingengineforum.com

Some additional examples:

https://youtu.be/HUWt3YrxoB4

https://youtu.be/bOL6QVnQQzc

"Hot cylinder is heated and the air inside is expanded and it pushes the piston forward..." "Momentum. That is why a fly-wheel is part of every Stirling design." I've concluded, after studying the operation of many Stirling engines over the years, that that is not all there is to...

My understanding is that the 92.5% of "un-utilized" heat represents the heat from ice temperature down to 0°K absolute zero. That heat below the cold temperature side of the engine, colder than ice, down to 0°K cannot be converted to "work" by the engine. But does that mean all t...

"And in the case of "Heat engine on ice", this case is also possible if you connect "hot expansion" at ice temperature Tmax = 273°K adiabatically with "cold compression" at say Tmin = 200°K..." I"m a bit confused. A Stirling "running on ice" wou...

"After my "meltdown" I opened up the displacer to check the state of the displacer and I was surprised to see that it was as good as new." Thanks. That does seem rather remarkable, that an engine hot enough to melt solder, nevertheless, did not burn or char the balsa wood displac...

The steel wool displacer can be seen near to the end of this video:

https://youtu.be/SroPkkqsE8U

This tin can engine seems to be quite powerful for the size and construction. I think it is mentioned in this video that the "displacer" is made of steel wool (technically, I would call that a regenerator, or regenerative displacer). At any rate, additional videos show the assembly and inn...

As far as I've been able to discover (correct me if I'm wrong) Stirling engines of this type had solid (or sealed hollow) metal displacers. (See image). I'm inclined to believe, however, that an engine of this general design might benefit by substituting a regenerator material in place of an ordinar...

I've read through the account, I don't think you've mentioned, so I'm curious, what do you use for a displacer in your engines? A "can" (solid or hollow displacer) or something porous like steel wool (regenerator).

Very nice work!

This is the first I've heard of it. Very interesting. Thanks!

Just a brief update. Progress on the engine has been slow, and completely stalled, with the world gone mad as of late, but as things appear to be gradually returning to some semblance of normalcy, my plans are to spend more time on this experiment. The rigid foam displacers have been shaped to fit, ...

I'm sorry to say that after an examination of that PDF I have no actual concept of how these supposed hydraulic (?) Stirling's are supposed to work. I'm not at all sure that the author has any real idea either, though I'm open to some explanation. I may be wrong but, my impression is that the idea o...

"THERMODYNAMIC THEORY OF HEAT ENGINES: CARNOT, STIRLING "Sadi Carnot (1796 - 1832) first realized that heat is a form of kinetic energy that can be transformed into useful work but only under the condition that this energy flows. He immediately found a comparison with an aquatic turbine th...

"ENERGY that a mass can potentially exchange with the environment is called ENTROPY. "

That is an interesting definition of entropy I haven't heard before.

I'm interested in how that might apply to a cold running engine. (A Stirling engine running on ice).

Fantastic!

I wonder how many others are quietly working on some masterpiece.

I'm also building, by fits and starts, as I find time, but it is a project. It is reassuring to know this forum is still here and I hope, will still be around for future unveilings.