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Indoor biochar producing TLUD gasifier building plans

 
Posts: 55
Location: Algarve, Portugal
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It's finally here folks, after using these stoves for a full year I feel confident enough to finally make plans available so folks can build their own carbon negative indoor cookstoves.

This design is the result of about 7 years of development which started with a much larger TLUD gasifier and ended up with this very small and most importantly super convenient to use small gasifiers.

The main components are a 1.3 liter thermosflask and a propane tank, both widely available almost anywhere on the planet.

Some specs:

- 87cm tall from floor to cooktop, 50cm triangular base
- batch loaded TLUD gasifier that holds about 800 grams of stove pellets
- produces about 110 grams of biochar in 55-70 minutes depending on atmospheric conditions
- all the biomass ends up as biochar, barely any ash production
- burns smokeless from start to finish
- very easy to light with just a small squirt of denatured alcohol
- great heat exchange into the room due to it's bell design, perfect as a heater/cookstove for vans/tiny homes or as a supplemental heater in larger spaces
- could be used as CO2 and heat supplementation in small greenhouses

Currently selling at an introductory price of 50€ and there are still early bird discounts available as well which puts the price at 40€. Early bird discount available to the first 10 buyers only.

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gardener
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Location: Cincinnati, Ohio,Price Hill 45205
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Looks very polished!
Very interesting you went towards low mass, and your tlud is not enclosed on this model.
You should do a video showing it off.
 
Martijn Macaopino
Posts: 55
Location: Algarve, Portugal
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Thanks William!

It's low mass because the heat output of these small burners is only about 1800 watts and the metal not only allows quick heat exchange with the room but also keeps the weight relatively low which makes it more suitable for vans and tiny homes on wheels.

I am working on one with a brick bell as well but mostly because the welding aspect of this design is putting a lot of people off.
Those plans will be included in this set of plans and will also be send to people that have already purchased plans.

 
master pollinator
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Location: Surrey, UK to Singapore to New Jersey
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Hi Martijn. Well done on your persistence and final, tested product. I have a few questions.

You mention price but not where to buy them?

If you wanted to heat a greenhouse how long does it burn for between refuelling?
Could it, say, get you through an eight hour frosty night?

What level of welding is required?
Could this be something a beginner could attempt?

I agree with William, a video demonstration would be awesome.

Congrats and good luck selling your plans.
 
Martijn Macaopino
Posts: 55
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Hi Edward,

I haven't set up a website yet so handling all orders via email or private messages on social media right now.

The stove burns for about an hour on 800grams of stove pellets and requires quenching of the embers after that. Not really a set and forget system. Only recommended for very small greenhouses just to take the edge of and it's more interesting for CO2 supplementation in that context than for heating.
The heating efficiency could be increased though if connected to a thermal mass water tank or aquaponics system. The heat output is about 1800 watts.

Only basic stick welding is required, my own welding isn't that special either and grinding does wonders :p
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Edward Norton
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Thank you - great answers. Email sent.
 
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Permaculture Voices 1, 2 and 3 - all 117 hours of video!
https://permies.com/t/voices123
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