low tar dual fire gasifier testing @diy @offgrid power @gasifier

some upgrades where made on the low tar 2 stage gasifier to produce even Les tar en lower maintenance en long operation time
'if you like this sort of thing' en if you want to help mi feel free to think about becoming a patreon en support the research, development, building en testing of cheap,clean en efficiënt energy technology's
go to! / oscarverwey
thank you in advance !

[@wenus525]

How many kwh electricity can you get from 1kg dry wood?

[@oscarverwey]

Whit a mix of 70% olive wood (hard type) en 30% soft type) about 0.9kw/kg at around 20/25% moisture you can get more if the fuel is dryer or whit exhaust heat recouberation, my new type can get about 1.2kw/kg at 30/35% moisture

[@wenus525]

@@oscarverwey 1.2KWh starting to look great.
Why you don't like tiny wood chips?

[@oscarverwey]

@@wenus525 only my new multi stage gasifier can take small en relatively wett chips whit the higher efficiency (around 1.2kw/kg because Al the stages ar separated in different zones, for the straight pipe i dont like smal peaces because it blocks the air to penetrate the middle of the combustion zone en in treated tar can pas by en it wil clog up the grate so you lose a lot of charcoal but shaking it out, the small twigs ar also a problem whit bringing en clapsing en chose quite some tar fluctuations in the output gas , Al this is eliminated whit my new design ;)

[@wenus525]

@@oscarverwey this one is multistage? How did you modify nozzle, except closing one?
I read papers that multi point air injection is better-> 5% at apper part (around drying zone), 15% middle part (pyrolisis), 80% oxidation.

[@senekemoi]

@@oscarverwey Solution for small particule is to reduce thickiness for air penetration, a good way is to built coaxiale multiple air nozzle ( a classic design with an air pipe with nozzle in the center reactor