[Stoves] Fabricated Burn Barrel TLUDS

[Anand Karve]

Dear Ron,
the material to be charred in our kilns has to be dry. We tell it to users.
Yours
A.D.Karve

On Sun, Sep 30, 2012 at 8:18 AM, Ronald Hongsermeier <rwhongser at web.de>wrote:

> Dear Alex,
>
> I haven't carefully read the whole thread but haven't seen granularity of
> fuel addressed. Isn't that what makes a lot of difference in the flame/gas
> quality ( along with the moisture content, of course ) and determines the
> necessity of either using or not using forced air? Regarding Dr. Karve's
> drums I'm wondering how careful everyone is in emphasizing fuel moisture
> and particularity/uniformity issues in using these tools.
>
> I think my first sentence above applies to both DD (Imberts or others) and
> TLUD's.
>
> regards,
> Ronald von der Oktoberfestnähe
>
> (mein heutiger Name wird nur dann getragen bei einer
> Bierleichensichtungsrate von > 1 / Tag   ;-)  )
>
>
>
>
>
> On 29.09.2012 20:55, Alex English wrote:
>
>  Tom,
> I guess it may depend on what you consider a clean burn. My experiments
> focused the gases through a smaller out let pipe and then added the
> secondary  air. So for a two foot diameter drum the pipe was three inches
> in diameter.   Air was introduced near the top having only half that
> distance to penetrate, and combustion occurred in a six inch diameter
> chimney , six feet tall above.
>
> Combustion was measurably good to very good nineteen times out of twenty.
>
> So, what indeed is the limit?
> Alex
> On 2012-09-29 11:47 AM, "Tom Miles" <tmiles at trmiles.com> wrote:
>
>>  AD, Paul, Kobus and others. Many thanks for the suggestions.
>>
>>
>>
>> What is the largest practical size (kg fuel/hr, kW) for a single TLUD
>> with a clean stack for heat recovery? There must be a limit to the air
>> penetration to get a clean gas burn form a natural draft stack or even a
>> fan driven TLUD.
>>
>>
>>
>> Tom
>>
>>
>>
>> *From:* stoves-bounces at lists.bioenergylists.org [mailto:
>> stoves-bounces at lists.bioenergylists.org] *On Behalf Of *Anand Karve
>> *Sent:* Friday, September 28, 2012 11:22 PM
>> *To:* Discussion of biomass cooking stoves
>> *Subject:* Re: [Stoves] Fabricated Burn Barrel TLUDS
>>
>>
>>
>> Dear Tom,
>>
>> we regularly supply charring kilns made out of used 55 gallon drums. The
>> kilns are based on the TLUD principle. The cost of a kiln plus an extra
>> barrel for storing the char, is about US$100. We have sold more than 100
>> such kilns in India and have also trained a number of persons from India
>> and Africa. These kilns are so easy to manufacture, that we ask the
>> trainees to photograph and take measurements of our kiln so that they can
>> copy the design. In many instances, people buy a kiln from us, because they
>> feel that their local fabricator would be better able to copy the design
>> from an actual object than from a blue print or a photograph.
>>
>> The advantage of using 55 gallon drums is that used drums are available
>> at a relatively low cost, and the kilns are portable. Instead of
>> transporting the biomass, one transports the kiln to the location where the
>> biomass is available, and brings back only the charred material, which
>> weighs only a third as much as the biomass.
>>
>> Yours
>>
>> A.D.Karve
>>
>> On Fri, Sep 28, 2012 at 11:42 PM, Tom Miles <tmiles at trmiles.com> wrote:
>>
>> Am often asked if there is a burn barrel sized TLUD that is commercially
>> fabricated. We’ve seen some great DIY with Doug’s Jolly Roger and others.
>> Is anyone fabricating a 55 gal drum sized TLUD that can be used for regular
>> biochar production? If so, what is the cost and availability?
>>
>>
>>
>> Thanks
>>
>>
>>
>> Tom Miles
>>
>>
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>>
>>
>> --
>> ***
>> Dr. A.D. Karve
>> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
>>
>>
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-- 
***
Dr. A.D. Karve
Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
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