[Stoves] SPAM Re: SPAM Re: Stoves Digest, Vol 146, Issue 3

Tue Oct 11 13:29:16 CDT 2022

You never need to apologize, Norm.

I'm leaning toward the bands over the cooking hole.  A band with maize
stalks is simpler and seems to be less smoky.  But the big band advantage
is the bundles can be swapped out to extend the cooking session
indefinitely.

It would be awesome if you could test the band and bundle method at
Aprovecho.  We have not yet tried to regulate air flow.

Moisture content is obviously important.  Please look at this video where
we compare the burning of two piles of freshly cut upright maize stalks
that were brown and looked dry.  (You may have seen it on the biochar
listserv, but it is also relevant here.)  We are demonstrating the
difference in smoke when a pile is lit on the side (left pile, the
traditional method in Africa) and when lit on top (right pile, the way we
train).  The difference in smoke is stunning.  However, when we compared
two piles of stalks that were cut two week previous, both piles burned with
little smoke.  I attribute this to moisture content.  Brown upright stalks
must have a higher moisture content than stalks that were cut and left on
the ground for two weeks.

Side by Side Burn of Maize Stalks (video):  https://youtu.be/5M4ntJi_JmY.
Some of the principles of the top down burn of large piles of maize stalks
are probably involved in the burning of stalks in bands from the top.

How do you test for moisture content?

On Tue, Oct 11, 2022 at 7:19 PM Norman Baker <ntbakerphd at gmail.com> wrote:

> Kevin;
>
> First, let me apologize for not getting emissions testing done for you at
> Aprovecho. Life seems to get in the way sometimes - especially when you're
> older and events crop up suddenly.
>
> The metal band with the stocks upright is probably a better way to make
> use of the maize stocks. From watching your videos it is clear this is
> functioning as a hybrid between TLUD's and flame caps. Do you make any
> attempt to regulate the air from below? When we go to Aprovecho I can
> easily make a band and we can do emissions testing on this new arrangement.
> I still plan to compare emissions of dried maize stocks versus maize stocks
> at ambient relative humidity. I think there will be a difference. I'm also
> planning to do this in a metal band versus the "conservation burn" style
> you originally worked with. Let me know what you think.
>
> Norm
>
> On Tue, Oct 11, 2022 at 10:05 AM <stoves-request at lists.bioenergylists.org>
> wrote:
>
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>> Today's Topics:
>>
>>    1. ***SPAM*** Maize stalks as cooking fuel in bands and bundles
>>       (Kevin McLean)
>>    2. ***SPAM*** Re: ***SPAM*** Maize stalks as cooking fuel in
>>       bands and bundles (energiesnaturals at gmx.de)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Mon, 10 Oct 2022 19:50:55 +0200
>> From: Kevin McLean <kevin at sun24.org>
>> To: Stoves and Biofuels Network <stoves at lists.bioenergylists.org>
>> Subject: [Stoves] ***SPAM*** Maize stalks as cooking fuel in bands and
>>         bundles
>> Message-ID:
>>         <
>> CALxcr-v5W0pxsbUd9wciv7aQ5k2CbiBg2Uo1Z2Yj4-5syEnxWA at mail.gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> We've long been trying to find a way to use maize stalks as a cooking fuel
>> in Africa.  They are challenging because they burn fast and smoky.  We may
>> have found a way.
>>
>> Make a bundle of stalks in a metal band and stand up the bundle so the
>> stalks are upright.  Then light the top.  The band has a diameter of 20
>> cm.  The stalks burn remarkably clean for about 13 minutes, no tending.
>> Then a new bundle can be swapped in to continue the cooking.  Below are
>> some videos.
>>
>> My colleague in Uganda thinks that farmers with two growing seasons can
>> cook year round with maize stalks and never need to collect firewood again
>> ... we'll see.
>>
>> As a bonus, this makes biochar.
>>
>> [image: Bands with maize stalks.jpeg]
>>
>> Videos:
>> Self help group leaders being trained on stalks in bands
>> <
>> https://drive.google.com/file/d/10VXniCh8-JFLg6EwFcImsmYbeJAEDu6D/view?usp=sharing
>> >
>> Stalks in band burning
>> <
>> https://drive.google.com/file/d/16QvwLwqTIQrV3rDuJGX_zqXJBoXZemKu/view?usp=sharing
>> >
>> Swapping bands of stalks
>> <
>> https://drive.google.com/file/d/1ZYqahvxprdjvsRkVav66clPegWoN3Uyc/view?usp=sharing
>> >
>>
>>
>> Kevin McLean, President
>> Sun24.org
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>> ------------------------------
>>
>> Message: 2
>> Date: Tue, 11 Oct 2022 12:07:22 +0000
>> From: "energiesnaturals at gmx.de" <energiesnaturals at gmx.de>
>> To: Discussion of biomass cooking stoves
>>         <stoves at lists.bioenergylists.org>
>> Subject: [Stoves] ***SPAM*** Re: ***SPAM*** Maize stalks as cooking
>>         fuel in bands and bundles
>> Message-ID:
>>         <
>> PAXPR03MB7917338104A32472776AB641A9239 at PAXPR03MB7917.eurprd03.prod.outlook.com
>> >
>>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> @Kevin
>>
>> Imagine you rise the sleeve higher up and leave some space between it and
>> the bundle.
>> It should have a "secondary air effect", I guess, and burn even cleaner.
>>
>> Holen Sie sich Outlook f?r Android<https://aka.ms/AAb9ysg>
>> ________________________________
>> From: Stoves <stoves-bounces at lists.bioenergylists.org> on behalf of
>> Kevin McLean <kevin at sun24.org>
>> Sent: Monday, October 10, 2022 7:50:55 PM
>> To: Stoves and Biofuels Network <stoves at lists.bioenergylists.org>
>> Subject: [Stoves] ***SPAM*** Maize stalks as cooking fuel in bands and
>> bundles
>>
>> We've long been trying to find a way to use maize stalks as a cooking
>> fuel in Africa.  They are challenging because they burn fast and smoky.  We
>> may have found a way.
>>
>> Make a bundle of stalks in a metal band and stand up the bundle so the
>> stalks are upright.  Then light the top.  The band has a diameter of 20
>> cm.  The stalks burn remarkably clean for about 13 minutes, no tending.
>> Then a new bundle can be swapped in to continue the cooking.  Below are
>> some videos.
>>
>> My colleague in Uganda thinks that farmers with two growing seasons can
>> cook year round with maize stalks and never need to collect firewood again
>> ... we'll see.
>>
>> As a bonus, this makes biochar.
>>
>> [Bands with maize stalks.jpeg]
>>
>> Videos:
>> Self help group leaders being trained on stalks in bands<
>> https://drive.google.com/file/d/10VXniCh8-JFLg6EwFcImsmYbeJAEDu6D/view?usp=sharing
>> >
>> Stalks in band burning<
>> https://drive.google.com/file/d/16QvwLwqTIQrV3rDuJGX_zqXJBoXZemKu/view?usp=sharing
>> >
>> Swapping bands of stalks<
>> https://drive.google.com/file/d/1ZYqahvxprdjvsRkVav66clPegWoN3Uyc/view?usp=sharing
>> >
>>
>>
>> Kevin McLean, President
>> Sun24.org
>>
>> [
>> https://ci3.googleusercontent.com/mail-sig/AIorK4zAIztZKxS3RzbnyZJ5ZD9359VFc-kCexObS_SF70Gwj0UezW9Scu7SqRnnNXaJ38t35hMmxIs]
>>  [
>> https://ci3.googleusercontent.com/mail-sig/AIorK4z2tsZ3rgW5tI0WX2NWWXDTqudhoRxP7rN4Fg_TMvvUZ5TZ86uotlupTwH8ivq8hBLlmCLH7Ac
>> ]
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>> >
>>
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>>
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>>
>> End of Stoves Digest, Vol 146, Issue 3
>> **************************************
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[Stoves] ***SPAM*** Re: ***SPAM*** Re: Stoves Digest, Vol 146, Issue 3

[Stoves] SPAM Re: SPAM Re: Stoves Digest, Vol 146, Issue 3