[Default] On Sat, 10 Aug 2013 09:21:36 -0400,"Lanny Henson" <[email protected]> wrote:
> >In the video where I am cooking in the rain, I feed in wet wood and wet >concrete block without loosing flaming combustion or creating visible smoke. Not wishing to criticise your design,Lanny, as it seems well made and economical. I do question the way you soak the wood as it is meaningless unless you establish how much water it has soaked up. Re wetting logs takes a long time because the surface tension of the water will not allow re absorption in a short time. The issue is that boiling water off from a green log is highly endothermic, the part of the log exposed to the fire cannot ignite until it starts pyrolysing and this needs a temperature of 230C+. The moisture content holds the bit of the log to 100C until it is boiled off and this is what depresses the combustion temperature and prevent a flame cleanly burning out the Products of Incomplete Combustion, which then appear as smoke alongside any droplets of water that have condensed as the flue is cooled. 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://stoves.bioenergylists.org/
