Stirlingengineforum.com

Vamoose, what are you going to use the power from the piezoelectric unit for, and how are you going to utilize it. Its good for making sparks, but as useful as static electricity, or lightning. Ian S C Hmmm... Maybe run it through a transformer, rectifier circuit to step it up to very high voltage ...

Hi Tom, Could one consider 'Piezoelectricity' to utilise the stress/pressure resulting from expansion and contraction of the regenerator? http://en.wikipedia.org/wiki/Piezoelectricity If you were to use a bi-metal regenerator with a piezoelectric polymer (or nanostructures) between the different ma...

OK, thanks. The intent though here is to increase the efficiency of the regenerator. not take it out or reduce the "dead air space". I think that an "elastic" regenerator would absorb and release heat more efficiently, especially if it were composed of that "super-elastic&qu...

Hi Tom, I like it, I wounder what would happen if the nut in the piston was replaced by a magnet, and a coil wound around the cylinder. You would need to make sure that the metal work was non magnetic. Ian S C Look at his other videos. He's gone through several more incarnations of this engine. The...

... I have found that the choke size is very important to achieve the proper lag/delay in pressure change between the two chambers. I am thinking about placing a large diameter valve (light weight) where the choke would be. This got me thinking about something you said earlier The heat tube volume ...

OK, I think the problem or misunderstanding is due to the fact that when I think of a Stirling engine I'm picturing something I can build out of old 16 ounce camp stove propane canisters. (I've got dozens of those laying around). So when you talk about heat exchangers, I'm just scratching my head, &...

Well, I do very much appreciate your input. It's a pleasure. The purpose of a heat engine is to convert heat into work. The more effectively it can do that, the less waste heat there is left over to cause the engine to overheat. Is That a fact. I was thinking of asking you to publish some pictures ...

You might find this paper interesting: http://www.cd3wd.com/cd3wd_40/VITA/STIRLING/EN/STIRLING.HTM The "plans" or illustrations and such are not very detailed but it discusses work that was done building Stirling engines for developing countries out of locally available material like old m...

Tom I'm sorry to say, I don't think I can add anything more to your Thread, as I was under the impression your proposal was applicable to the Stirling Cycle engine as invisaged by Cayley and subsequently patented by The Rev R Stirling in the early 18 hundreds. Clearly you are working on something m...

Tom I'm sorry to say I've obviously not explained myself clearly, my point was simply to say, you appear to be working on a solution, where no problem exists. The regenerator is primarily a device to improve the thermal efficiency by storing heat that would otherwise have to be rejected by the cool...

Tom Let me start by saying, the main problem with the Internet is, unverified information. Firstly, your extract from Wikipedia implies that efficiency and power output are linked, this IMHO is a false assumption,... Point taken. Though I don't see much point in debating the accuracy of wikipedia h...

Tom, It's stents, not stints, and they are expanded by passing them up an artery on the end of a tube, the tube has a small balloon that is inside the stent and when the right place is reachedthe balloon is expanded and the metal mesh of the stent expands against the artery wall, the tube, and ball...

... if you could some how design it to expand in only one direction, up and down and not sideways . You don't need the displacer grabbing the cylinder walls or shrinking so much too much working fluid runs around it. There are all kinds of different arrangements so it is sometimes difficult to spea...

Another possibility might be to use some kind of bimetal spring type material which would expand when heated, if something in this category could be found which would respond quickly enough.

he primary effect of regeneration in a Stirling engine is to increase the thermal efficiency by 'recycling' internal heat .... In practice this additional power may not be fully realized as the additional "dead space" ...reduces the potential efficiency gains from regeneration. http://en....