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Glad I could help

Big fan! He replied to my email!!!

Thanks for watching!

The openscad model is parametric. You can tell it how big to be and the parts resize.

Try here biofuelsacademy.org/index.html%3Fp=197.html Counter-current gasifiers like this are for making heat, not running an engine. Good luck.

Sorry. I only have the videos. You can find diagrams of updraft countercurrent gasifiers on the web. They are often just called "updraft" gasifiers. They are simple compared to downdraft gasifiers.

Short answer: constantly. This kind of gasifier needs an even, continuous supply of fuel - e.g. supplied by an auger using a level sensor

Engineers use venturi tubes with standard profiles, or orifice plates for flow measurement. This sinusoidal profile is my own idea and probably not ideal. To choose the right strategy for measuring flow you need to consider several things including necessary accuracy, nominal flow rate, max/min flow rate... I was testing if the cheap mems pressure sensors might work for me, and it does work to some extent.

This technology is in use today. Most gasification research is for "engine grade" fuel gas, and that is much more challenging. For heat, updraft countercurrent is a slamdunk. I know some lumber mills that use this kind of gasifier to run kilns, etc. They burn soaking wet bark mixed with dirt and gravel - no use if you were trying to run an internal combustion engine.

Yes I continue. I had a design I liked that was a positive pressure design (air blows in) and this will always be more dangerous than a negative pressure design (air sucked out) so I'm working on a practical negative pressure design. It's harder to test.

@@senorjp21 what is the way for send you somedocs and pictures .

There are many different pressure sensors with different sensing ranges. I'm sure you could find a sensor to fit your application. This MCP5010 has a 10psi range.

Hard to say. When the bond to the arms is strong the clamp force is sufficient, the failure mode seems to be shearing the plastic layers. Sorry - I'm not an engineer.

Hi Jonas geiregat, did you try to make pikler triangle with hirth joint? I am also thinking about it, but I also have questions regarding its strength.

@@vitt1812 Someone printed a set of these discs for me. But in the end I did not attempt to create a pikler triangle with them. From my research it became clear that the known design of those triangles is for a reason. Though it's cool to have an adjustable angle, there's only one ideal climbing angle. Having a hearth joint doesn't allow for a top horizontal bar. You then have two underneath the joint. This is a security issue. The two horizontal bars allow todlers to try to stand on top of the triangle.

I've had a bit more experience with this and I would add: wipe the ends with alcohol right before you try to melt the ends together. Seems like traces of oil or something can interfere with a good join.

@@senorjp21 Good point, I'll make sure to clean the ends for next time. The only trouble I had was to line them up properly, the ends tend to sort of glide against one another. But once hardened, boy, does it work! Cool thing to discover for me.

It works for me using openscad 2019.05. I added an STL to github in case that helps. BTW, measuring airflow using an orifice plate is probably a more reliable strategy.

Yes it would be better to operate at negative pressure. The reason I'm interested in updraft is to dry wet fuels so low quality fuels can be burned cleanly

@@senorjp21 i have a question, i have a barrel and i want to use what i watched with your video as a flame or fuel but the point here is when the temperature goes to 120C or much i want to decrease it to reach 60 f or 70 C so how can we control the temperature ?

Sounds like you will need some kind of control system to measure temperature and adjust the power level. If you tell me some more details I might have more to suggest. Cheers

2 wire brush less motors don't work as generators. The 3 wire fans include a tachometer output

@@senorjp21 2 wire motor are brushed motors they should work as generators. Will try it later to check?

I don't know. The 3rd wire is a tachometer square wave signal. If you pull the line high or low it will appear as though fan has zero speed. Your VFD might be overheating. Maybe add external fan cooling.

I wipe the ends I am trying to fuse with alcohol, then use a butane lighter to gently melt the ends using mostly the sides of the flame. When little melted bumps form I touch the ends together and hold them very still for about 30 seconds. There are specialized tools for this job as well. Good luck

I've seen heat guns with flat tips used as well.

I don't sell them, sorry. Ask around some libraries will print parts for you.

@ToooManyHobbies I don't use social media, other than RUclips. But I'd love to get one made

Hope it works for you

Link is in description

Absolutely. There is a lot of biomass energy lying around, but it is typically very poor quality fuel: wet, contaminated with dirt, high-ash. This type of gasifier is capable of burning those poor fuels cleanly (at operating temperature.)

@@senorjp21 Indeed. You have a very capable system there. I bet it would serve very effectively in a water heating application.

That looks like an excellent gasifier. Too much money for me! My model is pressurized, which is dangerous. Next version operates at negative pressure (draft.)

Мне нравится роскошь игнорировать Трампа. Я канадец. Большое уважение к русскому народу.

@@senorjp21 я украинец живу возле Росии тоже уважаю росию , они для меня не враги Канада это здорово чюдесная страна

@@sssr-un1gf This exchange is hilarious. GGG thought the OP was from the US (actually Canada) Then OP assumed GGG was from Russia (actually Ukraine). Good lesson about assumptions here.