Help me :)

Discussion on Stirling or "hot air" engines (all types)
Posts: 1
Joined: Mon Apr 05, 2010 6:47 am

Help me :)

Postby Trikko » Mon Apr 05, 2010 6:56 am

Last night I dreamed about a new stirling configuration. It's a strange rotary displacer stirling engine. I know who can build it for me, but i have to give him some projects. My problem is: what about ratios of "hot cylinder" "cold cylinder", "power cylinder" and flywheel?

Posts: 123
Joined: Mon Mar 08, 2010 1:32 am
Location: England

Re: Help me :)

Postby Junkie » Sun Apr 11, 2010 1:31 pm

Do you mean something like this
There's not much specific info available on these on line as far as I can tell, but maybe you could email the above and ask ?

Can't hurt :mrgreen: My web site, Stirling engines and AE stuff.

Posts: 7
Joined: Tue Apr 13, 2010 4:03 am

Re: Help me :)

Postby robertvi » Tue Apr 13, 2010 5:23 am

Did you see this video BTW?

I think rotary Stirlings like this are more simple to build but less efficient. Why? Think about the rotating displacer - it moves from the hot to the cold side just like the air does (only in an opposite phase obviously) - so the displacer moves heat through the engine without extracting any work from it :( An efficient rotary would solve this problem. Maybe your new design already did this? :D

Here's another rotating Stirling idea, probably not home-buildable though:

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