300 Watt, Large LTD Stirling engine!

[vamoose]

Has anyone come across this big/little beauty from Saitama University ?





Links to related web pages
http://www.bekkoame.ne.jp/~khirata/acad ... iki/yama1/
http://www.bekkoame.ne.jp/~khirata/acad ... 0pfrm.html
http://www.bekkoame.ne.jp/~khirata/acad ... strct.html

vamoose

[Ian S C]

Vamoose, no have not seen that one, but Koichi Hirata, from the university is a most respected expert on Stirling Engines, big and small, plenty on google about him and his engines. Ian S C

[vamoose]

yep, am familiar with Koichi Hirata and some of the projects he's involved in, (from a general interest level).
The links kind of scream his name...
Just thought I'd put the images and links to see if it sparked a bit of interest, as it hasn't raised its head on the forum before (to my knowlwdge).
There have been a few posts about Big LTD engines recently.

I also like this one
Its a big 1kw 'Alpha' configured LTD engine.


vamoose

[fullofhotair]

I am having problems understanding the one way piston rings on the power piston. They say it raises the minimum internal pressure. If you use rings on the power piston ,don't they just make a tighter seal ?

[Ian S C]

Think of the one way piston rings in the same way as the washer in a bike pump, on the back stroke the washer folds fore ward, and allows air into the front chamber, on the for ward stroke, the washer is pressed against the wall of the pump, and the air is compressed. On some of my motors I use a leather cup washer on the top of the piston, in that way you can allow a fraction more clearance for the piston. Ian S C