Stirlingengineforum.com

Um... why not both? No reason, just my experience that maybe 1% of these grand ideas actually amount to anything being built, much less working, so keeping it simple and focused on practicalities is good. But, this is a Stirling engine forum, so if this person is driven to build a heat engine for p...

Seems like a valid experiment. I would have been happier to see actual simultaneous temperature measurements using thermocouples against the hot/cold surfaces rather than trying use an IR imager. I have one of those cameras and the parallax issue between the visible and IR imagers makes the point re...

I would love to hear the opinions of those on this site. Sure to be an unpopular opinon, but two sources of running water calls for a hydro turbine rather than a stirling with a relatively small delta-t. Depends on whether it's being done for the edification of building the LTD engine, or for an ac...

Grand junction, Colorado here, looking to team up with other area SE & steam enthusiasts. Let's meet up somewhere, choke down some nasty coffee, and talk it over.

I have some 3 angstrom zeolite pellets meant to adsorb water from a gas stream or liquid fuel. About the same form factor as rice. May have to try that. Being basically clay, they should be able to take whatever heat is present.

The reference section on that paper is a gold mine for anyone researching thermoacoustics.

Unfortunately, I don't have access to the full article, and I didn't find it on Sci-Hub. Still, what the abstract describes seems in line with what we're thinking.

It is very interesting..

This is an engine meant to run at an internal pressure equal to (on average) to local atmospheric pressure. If you seal it tight with lube, heating it will pressurize the inside resulting in it being unable to retract the piston. It needs a pinhole somewhere so equilibrium can be established as it r...

Yeah, you're not wrong about any of that, but I can't fault a guy for seeking the most profit for the least work. If it's truly publicly funded work though, it definitely irks me that they would be able to patent restrict the concept thus preventing someone else from pursuing a residential market. Y...

I love the simplicity and elegance of this engine. I don't suppose there's a rule of thumb on the various parameters when building these? I've seen so many variations and almost no general rules on dimensions, displacement, stroke, diameter, etc. It's as if they just build them randomly (or intuitiv...

I assume that pistachio==piston, but what "hybrid" refers to I couldn't say. Also, I'm pretty sure that hose is for a cooling system and that short can behind the flywheel is a water pump sitting in a water bath.

Would someone be willing to help me understand this engine? Specifically, why does it accelerate when he opens the valve to the open-ended tube? Also, I see only one linkage which goes to the piston (displacer?) on the right, but he still has a pressure tube to what appears to be a power piston (the...

In general, refrigeration or heat pump systems using ordinary atmospheric air as the working fluid (refrigerant) still aren't used much, which I suspect is simply because air cannot be patented Could also be that the performance is terrible compared to other refrigerants. Just to get a feel for the...

I've been thinking of a clear Stirling engine with a mechanical butterfly inside that acts as the displacer.

This seems pretty close you what you're suggesting:
https://medium.com/@nexusomega/flutter- ... 279cac5982

Re microwave, was it you Tom that was proposing a microwave powered engine? If so, at least the efficiency should be a simple calculation of watts in vs. watts out.