Second attempt to post this. Stephen Brown reminds me he initiated a thread, a year ago, about his batch pellet burner made from a ss "baine marie" pot and ammo box inserted into a traditional, ornamental wood burner.
http://srb-terrierdog.blogspot.com/ This arrangement is near enough identical to the burner used in Kunzel 25kW pellet stoves, the differences are the ss fire box is more substantial than the pot and the air enters via expanded slits, rather than holes, to create a swirl, and the fan is induced draught rather than pressurising the ammo box. Stephen has two computer fans, one for heat circulation and one for combustion. The control of these is ideal for the little pwm Steve Taylor designed and made, I still have a few of these waiting to have a capacitor fitted. If you read the blog Stephen is using pellets in batches and avoids burning out the char at the end by emptying it back onto a fresh charge to run the thing batch sequential. I toyed with a similar idea but inverting the container at each fill, unfortunately I don't have the sort of metalwork skills some of our stovers have, I'm thinking particularly of Lanny Henson. Stephen mentions a normal run of 1.5 hours for 1.5 litres of pellets. Pellets have a bulk density of 600kg/m3 IIRC, dry graded woodchip should work but the bulk density is less than 25% this so it would burn out fast. AJH _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address Stoves mailing list to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://www.bioenergylists.org/ [email protected] http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
