Dear Crispin, and Stovers, The model I am suggesting goes like this:
Biomass has two components: The natural volatile (NV) component and the catalyst component. 1) Natural volatile component has all that is needed to turn into a gas except a little heat. It has all the hydrogen and internal biomass oxygen as well as about half the carbon. It is what is used to boil water and when this runs out we add more biomass. It contains all the energy we use from the fuel. 2) Catalyst is just carbon. To do anything we need to add the oxygen. Its purpose is to provide the temperatures to release the NV, to break down the NV from complex organic structures to simple ones (like CO and H). It heats the stove and boils off the water(?). Its rate of reaction determines if the energy used from the NVs will produce a dirty smoky stove or a clean, efficient one. 3) We control the catalyst by adding oxygen in the primary. The oxygen we add does nothing to change the energy value 'we give' to the NVs but may change the energy value of the NV's (lower) by pre-oxygenating. It may make the organic components more easily oxidized in the secondary creating more heat by breaking them into smaller, more simple structures. 4) In a TLUD the catalyst remains while in the rocket the catalyst gets used up until ash is left. Using up the catalyst can be converting it to CO2 (a nothing) or to CO that adds to the energy of the NV. I suggest even if it converts all the catalyst carbon to CO that that amount of added energy is only a fraction of the energy produced from the NVs and we can ignore or estimate. If you think this model will work for us all we need to do is determine the amount of energy in the Natural Volatiles and use as the total energy we get from the fuel. Regards Frank Frank Shields Control Laboratories; Inc. 42 Hangar Way Watsonville, CA 95076 (831) 724-5422 tel (831) 724-3188 fax [email protected] www.controllabs.com -----Original Message----- From: Stoves [mailto:[email protected]] On Behalf Of Crispin Pemberton-Pigott Sent: Saturday, August 17, 2013 11:44 AM To: Stoves Subject: Re: [Stoves] Saving the WBT Dear All The air fuel ratio refers to the mass of air needed per mass on fuel. It can be calculated from the C, O, N, S and H content of the fuel. The total air required for perfect combustion without any excess air is also called the stoichiometric air demand. Regards Crispin >From BB9900 -----Original Message----- From: "Ronal W. Larson" <[email protected]> Sender: "Stoves" <[email protected]> Date: Sat, 17 Aug 2013 11:19:52 To: Discussion of biomass cooking stoves<[email protected]> Reply-To: Discussion of biomass cooking stoves <[email protected]> Subject: Re: [Stoves] Saving the WBT _______________________________________________ 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/ _______________________________________________ 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/ _______________________________________________ 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/
