Why not build the C negative kitchen of your dreams? OK guys. I know the 'Permastove Kitchen' (PK) is a bit appley but the Universal Pot Stand (UPS) is designed for ergonomics (you can sit on a chair while you cook), small or large manufacturing, bolt-on modularity, logistics (it can be packed down), durability (2.5mm 304 ss), suitability for most stainless cookware and is stove agnostic aka as the TLUD 'Permastove Burner' or other TLUDs or other stoves evolve over the years, the UPS should stand the test of time.

The 'Permastove Burner' (PB) is multi-fuel biomass capable, and should give a long burn time with biomass pellets. Still passive with no electronics to break and complicate things. Should also be clean burning with no smoke and tiny greenhouse gas emissions. Both tubes can be cut/grinded off 1m lengths of 5" and 6" 1.6mm 304 stainless exhaust pipe or longer lengths eg.6m, for 3D tube laser cutting if going commercial. The maximum fuel volume in the inner cylinder is 2.19 litres with fuel placed up to the bottom of the secondary air holes if needed. Could be also coupled to a miniaturised and 3D printed 'Thermo acoustic Stirling engine' for 1kW (or less) output to charge a solid-state power bank for when the sun aint shining and the power bank is running low. Could work on Mars too (Cyanobacteria) and whatever future exoplanets we may happen to colonise eg.TOI-715 b. Any biomass can be made into pellets - for starters, why not sawdust or rice husk on Planet Earth?

Both the UPS and PB are adapted to South Australian manufacturing. After 6 months of testing the 'Flat Permastove' - I had to make the call. Do I go with the easiest manufacturing via a 2D laser cutter with many parts and ordinary biochar recovery or do I make a new TLUD as one part, all welded together, using the 'Tread Lightly' TLUD (3D metal printed as one part but too exxy ATM) as an example, with easy biochar recovery and emptying after a burn into water in a stainless steel bucket? There's also higher job creation with this design if it goes commercial.

There was also the supply chain issue which led me from the Kon-Tiki 'Rolls' biochar kiln to the Kon-Tiki 'Essential' biochar kiln. So I thought to myself - bugger it. I'll stick to the PK and if the supply chains go cactus, I'll adapt the design to the new conditions. I would love SA to produce green 304 sheet and tube 'Green steel'.

This is the closest I've got to energy freedom and independence so far...and the PB permanently removes Carbon from the atmosphere in the form of biochar 'Inertinite' maceral (if the biochar meets the 'Inertinite Benchmark' of greater than 2% 'Random Reflectance' (IBRo2%) for an 'inert' C half life of 100 million years or longer)   - a very handy material for fighting climate change with practically unlimited applications too.

Could be a winner for an outdoor kitchen, an expedition, a bush shack, tiny house or other planet.

I've just purchased a 230mm 2400W corded angle grinder made by Metabo (Hikoki would probably do the job too). The cordless grinders, though more convenient, were too expensive and I have access to a power point. The 230mm grinder discs have a standard bore size - I bought 8 of them @1.9mm thick and suitable for stainless. I purchased 1m length 5" and 6" 304 1.6mm stainless exhaust tube for prototyping the burner. I'm also not going with perforated mesh which could potentially warp with the heat (I even warped a 304 2.5mm base plate) - I'm going back to the 304 1.6mm woven mesh with 4.75mm aperture used successfully in the 'Flat Permastove V2'. This mesh can easily be grinded.

In this design of the PB, it could be weld free. There's a possibility of welding a handle to the outer 6" tube and welding the lid to both tubes (but the welds might not be strong enough to keep the tubes aligned) while you/someone else is welding the fins onto the UPS. In both scenarios, the TLUD would best be nested in a flat based large and deep oven tray to fit the cross piece. After a burn, the tubes would be lifted either individually or together (welded) and the biochar would fall out the bottom and form a small pile in the saucepan/oven tray. Water could then be added to completely quench the biochar and will collect in the tray. The mesh and cross piece would need to be retrieved for the next burn and probably won't warp - they seemed to be able to handle hot/cold temperature difference in a test I did with the 'Flat Permastove V2'. The biochar + quench water could be tipped into a 20L stainless bucket/large stockpot eg.100L/half PE barrel/trug etc. for inoculation if needed.

Or, the PB V2 could be a better option but would also need mesh welded to the outer cylinder and need hole sawing for the primary air holes and secondary air holes - or, the cylinders/tubes and holes could be 3D laser cut (if you can access it) in a commercial scenario off 6m lengths of 304. Whatever goes, but welding is time, finance, equipment, resources and skills.

If you can afford the tools and materials and are prepared to have a go prototyping, please get in touch on the 'Contact' page and we can swap notes. I'll post updates on this page.

I used 304 2.5mm stainless steel for the parts. The CAD can be viewed in 'LibreCAD' cross-platform software. Maybe you could form a TLUD Science-Art  collective and pool resources, share parts and swap knowledge and skills?

On a different note, I don't know how 'The System' can justify adding more fossil projects online when we're heading for catastrophic climate failure. It's an 'inconvenient truth' for activists that fossil is cheap energy but is equally inconvenient for the fossil industry that they know they are breaking the Planet and more people, Governments, Corporations, Countries etc. are noticing and doing something about it - presumably, apart from the Countries and Oceans (with mining Treaties between Countries) where it is being mined. Why can't Gov's in this category disentangle themselves from the fossil industry, acknowledge that it's a bad future investment, stop subsidising the projects, block new projects and move on with renewables? Surely, with current and future C negative technology we can completely 'phase out' fossil in the future.

But - if you're not into prototyping, collectives and possibly large scale manufacturing in a co-op, can't afford it, or perhaps are time poor, or something else, then there's already another option that's also Carbon negative (still produces biochar) and, as with the PK, doesn't use 'unnatural methane' (a false transition fuel) possibly produced from fracking (a driver of industrial ecocide).

For a '3 in 1' indoor and outdoor kitchen and possibly car camping too, I recommend the off-the-shelf 'FabStove' TLUD designed by Ekasi Energy - if you can afford and access one?

http://www.ekasi.energy/

It's worth checking out the video here:

https://blueskybiochar.com/products/fabstove-tlud-clean-cook-stove-coming-soon

A variation of the Chimney TLUD could be a simple length of 304 6" 1.6mm exhaust tube. Grinding only - no welding. Not even a handle. I call it the 'Exhaust TLUD'. 3 off a 1m length. Need to test the Chimney TLUD before finalising the design for the first prototype.