[Stoves] Fabricated Burn Barrel TLUDS

Crispin P-P crispinpigott at gmail.com
Sat Sep 29 19:19:37 PDT 2012


*Dear Alex *
*Do you have any clear idea of the burn rate? *
*
*
*Thanks *
*Crispin *

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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