The trouble with shop made dampers/flaps is they have to be so precise and the body has to be perfectly round. One trick to help avoid a sticky damper is to make it oval. Oval does not get stuck as bad as a damper that goes to full 90 deg to close. Oval and about 85 deg to close works better for hand/shop made dampers. Lanny ----- Original Message ----- From: Crispin Pemberton-Pigott To: 'Discussion of biomass cooking stoves' Sent: Friday, June 14, 2013 6:41 PM Subject: Re: [Stoves] Chimneys, rice husks
Dear Lanny Correct. We are using a flap-type which is installed in the side of the chimney by putting a Tee between the first and second pipes (they are clay pipe chimneys). At the moment we have no idea what the ideal draft is for the stoves – 2 and 3-pot Jolentho Stoves. We will make measurements and test the performance at different sustained draft levels. There is a significant difference in the field when a 3 or 5 meter chimney is added to the same stove. Mostly there seems to be too much air drawn into the ones with tall chimneys. Regards Crispin ++++ Like a barometric damper? ------------------------------------------------------------------------------ _______________________________________________ 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://stoves.bioenergylists.org/
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_______________________________________________ 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://stoves.bioenergylists.org/
