Stirlingengineforum.com

zhivko, you already made clear that the leak is a priority, so it'd take quite a leap of doubt to assume you're not already pursuing a fix. I assume you'll do it. It'll be interesting to compare performance before and after: I think your engine shouldn't have more than about a few p.s.i. difference...

zhivko, thanks for sharing your project. I've been following your build and if the goal is fun, it's already a success. As far as keeping the design simple and accessible, I don't know about the internal radiators, but I believe your expansion ratio might still be too high. I think your power strok...

Yes! I should fix this leak - I should use O-ring instead of flat seal... From the working success few days ago, and rethinking the situation from that time on, it seems that reason for bad efficiency is the lack of surface heat area (that is especially true in my case when engine is big). So - I wo...

FINALLY! It works... I still haven't measured the power but I see I have sealing problems between hot and cold cylinder - but stil I think it looks promissing. Thanks anybody who helped me with ideas especially GeofV, Ian and Ante !! Picture: BigBetaStirlingRunning.jpg Here is video: Video of big be...

Happy new year to everyone! Ian I think that you meant this link: canterbury LTD stirling . I got a lot of useful info from this link. I especially liked the idea of heat exchangers that could be arbitrary sized is very well explained. Somehow thesis seems unfinished because of lack of time. Such LT...

Hi Guys! I made a test to see how power piston breathes as GeofV and Ante suggested. If I assume correct power piston should follows movement of displacer (of course with some lag) - it seems it moves for around 5-6 cm. Test could be seen on following video: manually testing powerpiston movement or ...

Hi guys just to inform you I made new crank that should give compression ratio of 2.

video of new crank

Still waiting guy to metal sheet spin cylinder and displacer :( Hopefully it will happen in wednesdays :).

Will report how it goes!

Yes Ian, I am aware of fact that smaller cylinders could be much more efectively heated or cooled. BUT the fact is that I already have cold aluminium cylinder done, also mechanism and aluminium fins... This week I should get heater skirt, and also I found a sheet metal spinning guy Sheet metal spinn...

Hi guys, has anybody checked this paper Design of a 2.5kW Low Temperature Stirling Engine for Distributed Solar Thermal Generation ? This seems like interesting Stirling design for residential applications. Also heating low temperature difference stirling with solar energy is very attractive this da...

Zhivko Zhivko from drawing it seems to me that you adding skirt from back side of displacer, that will make lots of dead space,correct me if i am wrong. Hi Ante, The conical part is part of the heater guidance for hot air produced by gas burner. I hope that from this video it would be seen that it'...

Hi everybody, It seems I had luck today - I found somebody in my country, who works sheet metal spinning and I will send him sketches, to see what will be the price for displacer and cylinder. I will go for longer displacer with spherical end caps, length would be 2 times displacer diameter, and tig...

I saw you used my Stirling engine simulator (I'm the admin for http://www.solarheatengines.com). That number at the bottom of the output: isentropic compression heating, is a very important number and it just about guarantees that your engine will not run. It should not be higher than 25% and a mor...

Hi everybody - just had some idea: what if would be possible to round a trapezoidal sheet into tube of 250mm? Lke this one trapezodal 3mm height sheet . That would give plenty of small tubes (and heat or cool area) in longitudinal pipe direction. Of course that would require seal in cold side of dis...

Hi everybody, I had some thoughts abot heat exchanger that are obviously crucial for such a big engine. Ante gave me great idea (on private message), how and where to put heat exchanger and I wanna share this thoughts with you, so you can brush it, refine, whatever... ExchangerAssPresentation.jpg In...

Zhivko Regarding construction of the displacer, this is probably the hardest part to make in a HAE, after the piston sealing rings. Supporting it such that it stays clear of the heater casing is difficult unless it is supported through the piston and at the opposite end of the crankcase. My prefere...