Hollow displacer

Discussion on Stirling or "hot air" engines (all types)
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Chriske
Posts: 87
Joined: Sat Oct 02, 2010 1:24 am

Hollow displacer

Post by Chriske »

Hi,

All articles about stirling engines mention to use well sealed displacer, seems logic to. I just stumbled into an article in a German magazine.
Seems to me the displacer is hollow. Is this correct...? Will this engine work...?

Image

I'm not planning to build this one, just curious.


Chris
Mijn thuis is waar mijn draaibank staat...
Ian S C
Posts: 2218
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Hollow displacer

Post by Ian S C »

Chris, I would on first looking at it would say no, but then again I'm not too sure, what did the magazine say about the engine, and has a prototype been built? Ian S C
Geoff V
Posts: 121
Joined: Thu Apr 12, 2012 11:49 am

Re: Hollow displacer

Post by Geoff V »

Chriske

This looks like a version of a transferator although most users have the 'hollow pot' facing the other way (open end towards the heater) with the end of the heater formed to fit inside the pot, I fail to see the attraction due to radiant and conductive losses through the displacer. The mass, appears at first sight to be lower than a conventional, cylindrical displacer, but by the time a thermal barrier has been built into the transferator you're back where you started.

http://www.powercubes.com/hot_air.html

GeoffV
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