On Sun, 05 Aug 2012 12:11:11 -0400, Alex English wrote: >I have built a barrel based platform to mount the burner >and a variable speed blower to dial up the draft. This allow the >platform to mimic common chimney conditions or indeed higher pressure >differences.
I had the problem of how to protect the induced draught fan in a situation where there was no heat exchange, it was a tow along under-a-cover-burner for vegetation. Danny built me a simple centrifugal extractor just like yours and we isolated the shaft from the fan by a tubular shaft. The bearings still overheated. The work is on hold atm but the plan is to extend the paddles of the centrifugal fan and twist them into an axial fan, pulling cool air over the motor and blowing it down an outer tube concentric with the flue pipe. We need a good depression to prevent smoke from primary combustion escaping the sides of the sledge, flue gases seem to be visually clean, lost smoke from primary side equates to a loss of energy as well as a pollutant. AJH _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] 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/
