David, The issue of treating veg oil fhas been of recent concern in our arena, so your interest and the groups discussion insights are very timely. It so happens that we wil be up in the Usambara region of Tanzania ( roughly midway between Kilimanjiro and Dar es salaam) in Lushoto district in a few days and trying amongst other things, to figure out how to best use, used veggie oil in a slow turning thumper like like the single lung 5 to 8 hp Lister … We will be using it to supplant the electric motor becasue electricity conneciton is far too expensive for the group. The engine will be used not for electricity generation but as a driver of a small hammer mill which is being used for preparing ag residues for fuel briquettes. It has long been demonstrated that even at the equivlent of 10 cents a Kwh, the addition of the hammer mill element reduces costs of the very labor intensive product, by up to 30%. Of couse electricity has always been more convenient but only of course when you can get it. The group apparently is having a great difficulty getting the lines installed. Will be in touch and feel free to post any thoughts and insights as we go along..
I wonder btw, if the heat is needed to mix up the caustic. Daytime temps there are rarely below 70deg F/21C. If one could settle with slow cooking at say 110 F/37C, then the insulated solar cooking pot mght be a better option. Richard Stanley On Nov 7, 2011, at 9:49 PM, David Osborne wrote: > Dear Crispin, > On the long chain to short chain bio fuel, would this change take place if > say an individual from a village collected cooking oil and ran it through a > jompy boiler once maybe twice with caustic soda at 1%, would this be a good > supply of fuel for a community generator? Any one up for a trial? Ps look out > for BBC world challenge down to business awards 26th November 2011 on world > tv. > David Osborne > > > From: [email protected] > > Subject: Stoves Digest, Vol 15, Issue 11 > > To: [email protected] > > Date: Mon, 7 Nov 2011 12:00:01 -0800 > > > > Send Stoves mailing list submissions to > > [email protected] > > > > To subscribe or unsubscribe via the World Wide Web, visit > > http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org > > > > or, via email, send a message with subject or body 'help' to > > [email protected] > > > > You can reach the person managing the list at > > [email protected] > > > > When replying, please edit your Subject line so it is more specific > > than "Re: Contents of Stoves digest..." > > > > > > Today's Topics: > > > > 1. Re: Vegetable oil or biodiesel? (Crispin Pemberton-Pigott) > > > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Mon, 7 Nov 2011 01:03:57 -0500 > > From: "Crispin Pemberton-Pigott" <[email protected]> > > To: "'Discussion of biomass cooking stoves'" > > <[email protected]> > > Subject: Re: [Stoves] Vegetable oil or biodiesel? > > Message-ID: <[email protected]> > > Content-Type: text/plain; charset="us-ascii" > > > > Thanks AD > > > > On another list the issue of cold weather and raw oil as a stove fuel came > > up and I was thinking that making 'proper biodiesel' might not be necessary, > > just heating the oil for a few hours with some caustic soda added. The > > purpose is just to break the longer chains down a bit. > > > > What is the simplest (meaning rural micro industry) method of turning raw > > oil into a decent fuel? I was surprised to find out from the South African > > biodiesel association rep that they toss the shorter chains produced during > > this process. They did not realise that bioparaffin was little different > > from biodiesel. The point is a stove doesn't care what the mixture is. If it > > has short chains they simply add to the ease with which it can be turned > > into a gas. > > > > Stove users should not get stuck on definitions of fuel created by the > > automobile industry. > > > > Regards > > Crispin > > > > > > +++++++ > > > > Dear Crispin, > > I think that those oils which have very high viscocity may have to be > > converted into biodiesel. An acquaintance of mine makes biodiesel from > > animal tallow, because you cannot fill tallow into the fuel tank of a car. > > Yours > > A.D.Karve > > > > > > > > > > ------------------------------ > > > > _______________________________________________ > > 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/ > > > > > > End of Stoves Digest, Vol 15, Issue 11 > > ************************************** > _______________________________________________ > 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/ >
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