300 Watt, Large LTD Stirling engine!

Discussion on Stirling or "hot air" engines (all types)
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vamoose
Posts: 267
Joined: Tue Jul 03, 2012 12:16 am
Location: Australia

300 Watt, Large LTD Stirling engine!

Post by vamoose »

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


ImageImageImageImageImageImageImage


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
Posts: 2218
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: 300 Watt, Large LTD Stirling engine!

Post by 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
Posts: 267
Joined: Tue Jul 03, 2012 12:16 am
Location: Australia

Re: 300 Watt, Large LTD Stirling engine!

Post by 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.
Image

vamoose
Last edited by vamoose on Mon Nov 18, 2013 2:37 am, edited 1 time in total.
fullofhotair
Posts: 265
Joined: Sun Aug 05, 2012 6:28 am

Re: 300 Watt, Large LTD Stirling engine!

Post by 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
Posts: 2218
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: 300 Watt, Large LTD Stirling engine!

Post by 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
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