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: psand...@ilstu.edu
Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com
On 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
stoves@lists.bioenergylists.org
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
stoves@lists.bioenergylists.org
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/