[Stoves] Pedal powered fan

[AJH]

On Tue, 19 Dec 2006 19:48:12 +0000, steve Taylor wrote:

>There´s a few classic low Delta T designs that rely on very, very close 
>fits, but not sliding contact between the displacer and power piston and 
>their respective cylinders

The design I saw at an exhibition at Kew recently seemed to have a
power piston and diaphragm and this pivoting displacer. I expect Ken
Boak would know as he organised the event but he hasn't responded to a
recent e-mail so may be away.

The thing is low temperature stirlings are very large for their
output, when they are just distributing warm air this may not be a
problem but their low output coupled with relatively poor efficiency
would make the parasitic losses for a cook stove too high.

They are finding a niche in small domestic chp where their near zero
maintenance and expected long life and quietness means they can be
embedded in a standard wet central heating system boiler.

AJH