Dear Paul A If you cut the twigs or sprouts 1” to 2” it will split and dry faster than if you cut longer due to the cover of bark. Long or short chips depending also what’s performing best in the stove.
Regards Paal W From: Paul Anderson Sent: Wednesday, January 08, 2014 6:35 PM To: Discussion of biomass cooking stoves Subject: Re: [Stoves] [Gasification] Chip Guillotine Dear Paal, VERY interesting. The two men were cutting the twigs to be what length? And want was the length (or other dimensions) from the wood chipper machine. Depending on your answer, and if the twigs could be cut at double the length and still be useful, that would give a great reduction in human effort (not 50% because the twig still needs to be handled, but only half the number of cuts). And the chipper almost certainly could not have been adjusted to make the longer twig-segments. Paul Doc / Dr TLUD / Prof. Paul S. Anderson, PhD Email: [email protected] Skype: paultlud Phone: +1-309-452-7072 Website: www.drtlud.comOn 1/7/2014 10:25 AM, Paal Wendelbo wrote: Dear Paul A Up to 40 mm green sprouts from energy forest activity in Africa, can easy be cut with a machete at an angle about 45 ˚. They will split up and dry fast in the sun, ready to be used for cooking in a TLUD within two days. 1000 trees can be planted at one ha, and will give about 10 kg yield each every year. The leaves should be left at the field. 360 trees around 1 ha land will give about 3600 kg, plenty of fuel for a household and even some for sale. Into a good TLUD this type of fuel will give about 20% biochar, which can go back to the energy forest or soil. We had an experiment at Nyabyeia Forest College in Uganda 15 years ago with a 75 hp. tractor with a wood chipper and two men with machete cutting pine twigs. The two men could compete in price per bag, but not in quantity and they got tired. A household need about 4-5 kg per day for cooking, and that will easy be cut by somebody in the compound. Best regards Paal W _______________________________________________ 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/
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