[Stoves] farmed fuels
Crispin Pemberton-Pigott
crispinpigott at outlook.com
Thu Jun 27 10:22:21 CDT 2019
Yes, bit is won't get very hot. Perhaps you could warm water on it.
I suggest trying a few things then see how it goes. There are many variations on this theme. One is to put a container of fuel inside a TLUD with the outlet facing up and no air holes at all. The container - perhaps a cylinder - is surrounded by enough fuel to heat the container. No more.
The gas produced will be the total of the TLUD fuel burning/pyrolyzing in a conventional manner plus the gases from the container. The char quality in the container will be higher than the pyrolyzed material around it.
The principle at play that the fuel in the container can be low quality biomass like leaves or shells.
There is a big future in charcoal pellets. Wonderful fuel and very clean burning in a simple device.
Regards
Crispin
From: info at sun24.solar
Sent: June 27, 2019 10:54 PM
To: stoves at lists.bioenergylists.org
Reply to: stoves at lists.bioenergylists.org
Subject: Re: [Stoves] farmed fuels
How tightly does the lid have to fit? If the fuel container is a cylinder with a bottom that has holes, can a cookpot without much warping serve as the lid?
Thank you,
Kevin
Kevin McLean, President
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On Thu, Jun 27, 2019 at 10:34 AM Crispin Pemberton-Pigott <crispinpigott at outlook.com<mailto:crispinpigott at outlook.com>> wrote:
Dear Kevin
You can create char by using your clay container that is covered with a lid that seals well. Have a small number of holes in the bottom. Or one big one like AD Karve's sugar cane leaf pyrolyzer.
Load the cobs and close the lid.
Place the container on small fire made of anything, perhaps other corn cobs. The contents will heat and eventually give off combustible pyrolysis gases.
These will emerge from the bottom and burn in the existing fire. Once well established, the (gas) fire will continue to burn long after the external fuel is gone. It is the gases which are keeping the reaction going.
The Adam charcoal kiln works on this principle. Once started, the baking of the contents continues without external fuel.
The contents are never exposed to flame, only heat. The product will be superior to anything you can get from a TLUD.
This process can be done on any scale. It can be done in a cast iron pot if you want. Use wet clay to seal the lid and make a hole in the bottom centre. The gases will go out bottom and burn outside, heating it. All you need is an extermal fire to get the process going and biomass inside.
What Chris Adam sells is a way of doing this with wood, two cubic metres at a time, at reasonable cost.
If you already have an old cracked cast iron pot, fill it with biomass and aim the crack at the fire you cook with. A hundred variations on the theme are possible.
Regards
Crispin
From: info at sun24.solar
Sent: June 27, 2019 8:07 PM
To: stoves at lists.bioenergylists.org<mailto:stoves at lists.bioenergylists.org>
Reply to: stoves at lists.bioenergylists.org<mailto:stoves at lists.bioenergylists.org>
Subject: Re: [Stoves] farmed fuels
Teddy,
We've done some work on a simple clay basket to improve the efficiency cooking with corn cobs a fuels. The basket seems to help. We need to get back to this soon.
Can you (or Ron) think of a way to modify this to produce biochar?
Here is that section from our Cookstoves Overview<https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F1ZryS7gQ1q3zKLZPM2KcXdtIHbOYQp4PbloPqMvrlZ5Y%2Fedit%3Fusp%3Dsharing&data=02%7C01%7C%7Cde2eca7430fd406a567708d6fb0f5ba6%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636972440728538590&sdata=OG1D%2FPR521jWx5qIyGcf8Zyd4d%2BWvU%2FhutYa75hCErU%3D&reserved=0>:
Clay Corn Cob Basket
Corn (maize) has become a major food crop in many developing countries. Many women use corn cobs without kernels as fuel for cooking. For one to two months after harvest, many women use cobs for cooking fuel. There are often two harvests a year.
The women typically pile the cobs on the ground and light them. The smoke emitted is much worse than when using wood for fuel.
We have found that elevating the cobs and allowing air to circulate under them lets the cobs burn more efficiently with much less smoke.
[X]
A clay basket with holes on the bottom works well. Clay baskets are easy to custom make. Or, you can use the clay liner from a charcoal jiko. Just elevate the basket with sticks or stones to allow air under the basket.
[X][X]
Here are videos showing the improvement by using a clay basket:
Kenya 1<https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdrive.google.com%2Fopen%3Fid%3D1Up-H1BasMBs7L4QfH8fDW5cqwLeI_cr0&data=02%7C01%7C%7Cde2eca7430fd406a567708d6fb0f5ba6%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636972440728538590&sdata=xolcZjD08IHJKqE8jyUyt%2B8EToTme9Nk5gkX0zvtRFc%3D&reserved=0>
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Here are two videos showing how a corn cob basket is made Uganda.
Making a spinning plate<https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdrive.google.com%2Fopen%3Fid%3D1C_upZwxzdJItP_d4-YzzXYlfywKfvCpu&data=02%7C01%7C%7Cde2eca7430fd406a567708d6fb0f5ba6%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636972440728568607&sdata=OX8ctoRYQp13vU4Kn4dav8gSurOcjmB0L6KhNJ90%2F48%3D&reserved=0>
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Width - 14cm.
Height - 8cm.
Diameter of the holes - 2cm
Thank you,
Kevin
Kevin McLean, President
Sun24
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On Sun, Jun 23, 2019 at 2:14 AM Cookswell Jikos <cookswelljikos at gmail.com<mailto:cookswelljikos at gmail.com>> wrote:
we have had some pretty good results with maize cob charcoal http://kenyacharcoal.blogspot.com/2012/10/make-and-use-maize-cob-charcoal.html<https://eur04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fkenyacharcoal.blogspot.com%2F2012%2F10%2Fmake-and-use-maize-cob-charcoal.html&data=02%7C01%7C%7Cde2eca7430fd406a567708d6fb0f5ba6%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636972440728608645&sdata=SwjNixrxoJbTZxEr7FUt8WhIW7WVd15leEi24jitsMA%3D&reserved=0>
quite nice as you dont have to spend time cutting it up into small bits and it blends very well with regular branch charcoal for quick lighting and long burning. ( and according to some chefs its makes roast meat taste a bit like ugali...(polenta) which to them is a big bonus)
the woodvinegar from the maize cobs also seems to show pretty decent potential for helping slow down termite attcks on fence posts etc.
Teddy Kinyanjui
Sustainability Director
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On Thu, Jun 20, 2019 at 12:04 PM hennA1988 <energiesnaturals at gmx.de<mailto:energiesnaturals at gmx.de>> wrote:
Hallo all,
not for the first time I try to bring giant reed(arundo donax) into the discussion.
Here in Spain, we have many years of experience with it.
Although being registered as invasive, it is quite easy to control by simply plowing and/or grazing.
Goats make short work of it by browsing all fresh shoots wherever they grow out of the designed area of the rizoma thicket.
Arundo is perhaps the most productive plant in a wide variety of climates and can easily be harvest by hand, even without tools at all!
The straight growing stems make it an ideal candidate for use in rocket stoves, densifying can be achieved by just trampling on the dry canes or passing them through a set of rollers.
Cutting the canes to an appropriate length makes them easy to handle and standardize as fuel.
And for more industrial processing:
They make excellent pellets!
Their capability to clean dirty waters up to potability is legendary, building up soil in it's way.
Seasonal management provides good shelter to all kind of wildlife during the main growing season, since there is a good time for harvesting during it's resting months in low season.
What more can you ask?
Valuable building material? Yes !
Cut in the right moment, it makes for strong floors, ceilings and walls.
Wonderful guides for tutoring tomatoes and all kind of vines.
And last but not least, it provides the only "legitimate" way to cook a proper paella!
Not enough?
I could go on and on...
Try for yourself!
Rolf
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On Thu, Jun 20, 2019 at 1:09 AM +0200, "peeters frans" <peetersfrans at telenet.be<mailto:peetersfrans at telenet.be>> wrote:
DEARS,
Sweden uses SALIX.
Indonesia uses KNOTWEET 3x 270 cm (Japanse duizendknoop )
The strong KNOT make new hollow stalks every year !! Only a knife is needed for harvesting . Cut each stalk chamber before burning !
Regards
F.
Van: Stoves [mailto:stoves-bounces at lists.bioenergylists.org<mailto:stoves-bounces at lists.bioenergylists.org>] Namens Kirk H.
Verzonden: woensdag 19 juni 2019 22:38
Aan: stoves at lists.bioenergylists.org<mailto:stoves at lists.bioenergylists.org>
Onderwerp: [Stoves] farmed fuels
Hi All,
Does anyone have any stories about using farmed fuels for cook stoves. I grew some Pigeon Pea plants last year and the stalks burn well in a TLUD-ND. They died from the frost during the winter, but we did get a small crop of peas.
Kirk H.
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