I am not a big believer in tin can stoves that last a short while and must be discarded after a few months. Poor people deserve gasifiers that last a long time. We should not offer poor people cooking units that we would not be proud to operate in our own kitchens. I believe it is possible to make high-quality gasifiers that sell for less than $20. For example, a reactor made in ceramic can withstand heat as high as 1,750 C, Yet it can be bought for about $4.50 US.
Also in the context of producing gas for purposes of cooking, I favor true, high temperature gasification (>700C), not pyrolysis. The principle idea is to produce a clean gas consisting, above all else, of H2 and CO. It takes a lot less secondary air to burn H2 and CO than to burn methane, propane or butane. In a cooking situation, we should not be concerned with producing acetic acid, oils or even methane. Biochar is important, but it is a by-product of the production of a clean cooking gas. Here is a small gasifier of an interior diameter of 100 mm: http://dl.dropbox.com/u/22013094/100%20Ceramic%20Gasifier/001.pdf The reactor here consists of a ceramic pipe normally used as a conduit for molten metal. This gasifier has a low-pressure, semi-premix burner. It is not designed to support pots and pans. Rather it fits into a stove top which does so. Thanks. Paul On Sat, Nov 19, 2011 at 5:41 AM, Max Turunen <[email protected]> wrote: > Very cheap gasifier for Yard Only -use: > http://holon.se/folke/carbon/simplechar/simplechar.shtml > Uses only old barrels and some rocks/bricks... but has limited lifespan. > > > MaxT > > Why sell gasifier stoves... when one can display instructions for making > various sorts of gasifier stoves, from local materials, by local people... > chosen by local people ? (on non gasifying side there seems to be some > really high precision clay cooking+heating stoves... which might be used > for gasifying with old cans containing biomass in them, upside down, for > pyrolysis gasifying reaction) > > On Fri, Nov 18, 2011 at 11:38 PM, Jan Bianchi <[email protected]>wrote: > >> ** >> >> Do any of you know of a list that compares different clean burning cook >> stoves not only by fuel type, efficiency and emissions, but also by price >> and the presence or lack thereof of subsidy? I don’t see the latter >> information on most websites that describe different stoves. **** >> >> ** ** >> >> If there isn’t such a list, maybe we could work to put together one by >> each of you sending a link that describes a stove and stating the price >> they are currently being sold for in local communities, together with >> whether there is a subsidy and if so the amount? I’d be happy to work with >> **Erin** to put together such a list from your answers.**** >> >> ** ** >> >> For people living on $2 a day or less, what for example would be >> considered a low cost stove? Middling? High?**** >> >> _______________________________________________ >> 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/ >> >> >> > > _______________________________________________ > 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/ > > > -- Paul A. Olivier PhD 27C Pham Hong Thai Street Dalat Vietnam Louisiana telephone: 1-337-447-4124 (rings Vietnam) Mobile: 090-694-1573 (in Vietnam) Skype address: Xpolivier http://www.esrla.com/
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