Andrew, thanks for reminding, and Erin, thanks for re-entering my old proposals and pictures to the discussion of the stovers!
Out of my view draft for a stove should be divided into: 1. A small amount of sufficient high pressured air for primary air. 2. A bigger amount of low pressured air for secondary air. (recently mentioned in the discussion 5 times the amount of primary air) ad 1. When the primary air has a pressure that is remarkable higher than the pressure-loss made by the burning-chamber, ashes, etc. the amount can be determined/achieved by a variable "stenosis" (resistance). By that, the amount does not change much by different resistances in the burning-chamber. In older anesthesia-apparatus the administration of all the fresh gasses were given and measured in liters per minute ( approx. possible setting from 100ml up to 10 liters per minute). The volume was measured by a rotameter. ( a small ball flying by the gass-streamin in a cone-shaped graduated glass-tube, indicating the gas-flow). The fresh-gas-flow did not change remarkably within the artificial respiratory pressure-changes ( maximal pressure differences between 0 cm and 40cm water-column) For stove-research-experiments a rotameter would be important, for simple use there could be only a quenching-clamp in the primary-air-tube. ad 2. The secondary air could be made by a simple (low-pressure) multi-fin-axial-fan ( propeller-like ) which transports the air in direction of the axis. The radial-fans dealing with a centrifugal air-stream make some more pressure. - Erin digged out my old low-tech-proposal the Malot-rotor, -I guess, when it would be placed in a housing, it could make a (slightly) higher pressure than the computer-fans. But I doubt it will do fine for primary air. Bellows: Could make sufficient pressure for primary-air. Andrew, I don't know whether I wrote about double-way-bellows in that time and about connected and phase-shifted bellows. I think, to get a reasonable continuous flow, there should be at least one double-way-bellows connected to a flow-egalising air-bag. Two small phase-shifted double-bellows, could possibly do the job without an connected air-bag. The phase-shifting is no problem; the movement can be done by hand or feet, without hurry. Funny to be reminded to those old low-tech ideas. -There are still others in my mind :-) Regards Martin _______________________________________________ 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/
