Stirlingengineforum.com

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 ...

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 mu...

Ron There is no need whatsoever for an appology, I didn't wish to imply that you thought we are all a secretive bunch, the problem is simply that even after nearly 200 years there are no plans for an engine which is easy to build. Andy Ross, along with several others, have produced some very good en...

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 coole...

Ron I do not believe for one moment that SE enthusiasts are not willing to share their designs, the problem is, nobody has produced a design which can be made with rudementary equipment, limited skills and is capable of producing 'usefull power', the reason, pressurisation. Because the surface to vo...

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, the addition of a regenerator will reduce the heat input required for a given power ou...

Ron The main problem for the Stirling cycle is the Infernal Combustion engine which will always be cheaper and more powerful per unit mass, all well and good until there are interuptions in the fuel supplies. Material development has over the years made a difference to SE's but has also benefited th...

Hello Ron Not sure how much research you've managed to do so far, but to the best of my knowledge there are no kits and very few good designs for engines in the power range 50w-500w, for various reasons. Building an engine to produce 5w is fairly easy, but scaling them up to produce more power becom...

If any body on the Forun thinks imbalance in an engine is inconsequential then please try the following test.

Take a reasonable mass, say a house brick, shake it hard for 10mins (if you can, I can't) then tell me again that it doesn't consume any power.

GeoffV

Zhivko Just so you are not misled by guessing, the dimensions of Peter Lynn's model 14 engine are nothing like those suggested by Ante! I'm not prepared to divulge the dimensions as they may have commercial implicatons but I can tell you the bore is much smaller. All you need to do to get your engin...

Zhivko I think you are heading in the right direction but unless the fins (lamels) are brazed to the casing there will be a thermal barrier to the heat flow, see an example in the book by Andy Ross, http://stirlingbuilder.com/ also you would have to add fins to the outside of the heater casing to ta...

Zhivko I have no pictures of the construction of my displacers, I am normally too involved to bother with the camera when I'm in the workshop, however there is a video of the internal parts of one of my engines showing a finished displacer, hope it helps. http://youtu.be/jAQ5kr_yFwo I have also been...

Zhivko The engine by Peter Lynn, if the power measurements are correct , is very good news for all builders of Hot Air engines. It appears to demonstrate that the heat transfer is also taking place from the displacer walls, presumably receiving heat by radiation from the outer casing. I've been test...

Zhivko

I've no experience with radiators, I have heard of flat plate heat exchangers being mentioned but again I've no experience with them, sorry.

GeoffV

zhivko 26, I guessed with a displacer of 250mm diameter that the casing would be a little larger hence 26cm diameter. The 10mm gap is far too large to get any real heat transfer to the working gas, which just flows down the middle of the gap outside the boundary layer, this is the problem with large...