A word to the wise: little metal cook Rocket Stoves are very cool and useful. They will last a good long time if not insulated and kept small. If you plan a larger version or wish to insulate to improve efficiency, use a refractory material! Temperatures inside can exceed 1000c. Combined with excess oxygen, this will burn out mild steel and even degrade stainless steel dramatically.
@marthale7 It will. Refractory tends to be somewhat insulating, moves heat away from the combustion area slower and will approach saturation quicker (unless the metal is insulated, which is a bad idea). Part of what makes rocket stoves efficient is concentrated heat inside the combustion area. It's why the best practice is to NEVER remove heat to your uses from the combustion unit itself. Use refractory, insulate it well from the feed to the top of the riser (it's not considered to be a "chimney" for reasons too complicated to discuss here now) and take heat to your uses after (and only after) the top of the riser. This will insure more complete combustion for most of your firing time.
@marthale7 A way to improve without having moving parts is good proportion. The general recommendation is 1:2:4 (feed:horizontal:riser). Shortening the horizontal bit and lengthening the riser part will go a long way, especially with smaller stoves. A little metal cooker can really rip with a proportion of 1:2:5 or 6.
@marthale7 Only problem with a BatchBox is that it looks so much like a standard firebox that the uninitiated will treat it as such. Stuffing wood against the throat or trying to damp them down are the worst for batch boxes and they're the first things people try to do!
I ran across this video Robert and have to say you really did your homework. A pleasure to hear this lecture of a very old method used for heating whatever. Job well done for sure.
3:14 I would like to correct a misconception about gasifiers (since I work for a company that makes biomass gasifier gensets). Gasifiers don't collect the decomposition products of wood as-is, because too many of these products condense into acids ("wood vinegar", or pyroligneous acids) and tars. Gasifiers are refineries that convert the crude feedstock of biomass into a gas that is compatible with an internal combustion engine, and these acids and tars make the gas unfit for use in an engine. What gasifiers do is combust these tars and acids, and thermally crack the rest into lighter non-condensing gases, then send these through the hot charcoal to carry out reduction reactions. The reduction reactions react CO2 and H2O with hot charcoal. When the carbon in charcoal is hot, it has an incredible oxygen affinity, and will readily rip oxygen right off of CO2 and H2O to release CO and H2 gas, while the oxygen that got removed in the process combines with carbon to form CO gas from the charcoal. Since CO and H2 gases are both flammable and non-condensing, they are safe to feed into an internal combustion engine. A lot of folks get the idea that a gasifier is just something that collects the thermal decomposition products of heating wood, and Nighthawk In Light made a bunch of videos that spread this misconception. What he made wasn't a gasifier; what he made was a pyrolyzer. Pyrolysis is only one of the five processes of gasification. The gasification that was used to power cars during the world wars (when all the petroleum went to the military first and foremost) did not send pyrolysis gases into the engines; they burned this and carried out reduction reactions using the CO2 and H2O from combustion reacting with the charcoal that resulted from pyrolysis. The resulting mixture of CO and H2 diluted with atmospheric N2 is what went into the engine.
I had only heard about rocket stoves and wondered what the fuss was all about. Thanks for your tutorial. Knowing how things work is a big benefit to someone like me.
I Just had that sort of thought while he was talking. running a gasification unit off the heat of the chimney, funneled back into your fire box to get a more complete burn. I'd love to see that setup.
God bless you rob , your channels are always my favourite sources of information and entertainment. The only channel I press like before the video starts ! Thank you!
brilliant! one of the best-- if not the best-- explanations of the burn process. Please do more. you are a gifted teacher and obviously know your subject. Please talk more about the molecular structure of wood and how the components break down under heat, what temperatures, and how their molecular structures break apart and form different molecules. thanks again!
5 litre paint can , say 12 of ¾ inch holes around the bottom just ½ inch above the base . Holes punched through with sharp knife with a horizontal and vertical jab per hole,, kinda square holes thus ,, . No holes at top for exhaust gases but use ½ or ¾ inch diameter metal pipe,,, small section of green branch works too,,, across top as spacing for exhaust escape that pot/pan sits on. Lasts for 6 months of regular use . However 6 building bricks nicely circle it when placed vertically side to side around for support of some really heavy cookpots to also give wind protection. It'll do ten litres of soup fine .
I like to play around with/experiment with different ways to cook from candles to gas, Ive cooked over oil lamps and it works but you need a way to keep the pot off the chimney so in an emergency its doable but complicated. A Dietz D Lite Lantern has a flat spot on top that you can balance a small pot on and the flame can still breath... Rocket stoves are pretty amazing with how little fuel is needed to boil water or cook a meal.. a 28oz soup/bean can as the main body and a small 6oz juice can as the fuel feed can run on a couple handfuls of twigs
you can dig a rocket stove if you are lacking materials to make one. I think the Dakota pit fire is just a folded up rocket stove in the ground. Might be worth looking into.
Speaking lower is a leadership skill, it indicates confidence. It can also be taught as a mind trick. Our task is to recognise it for what it is when used.
@@peterclark6290 When duplicated for video, volume is somewhat irrelevant vs your quality of microphone. I watch these on my pc with studio speakers and have to crank it up, too, then remember to turn it down before I go to the next vid.
dang Robert ,thanks , I have been searching for more info on these . Some one else asked too , next up any chance of how to do a gassification column with one of these , for a complete clean burn or recyle for fuel ,of plastics . This has been done very succesfully , beyond 2000 did a story [ a quarter century !!?? ,NOOO ].,so far no municiple organisation that i've heard of has done a thing !?. Seems private organisations and individuals are though . My understanding is only real hazard is PVC's [ that can be done ] ,but burning or making a diesoil is quite simple .
Did you use a new camera here ? The shot seems wider - the lighting seems a bit more yellow - the volume was also way lower. Oh, too much ceiling, not enough table. :-) I do love the time you are spending on the rocket stoves - explaining the efficiency is awesome.
Interesting,once in Russia I visited a monastery with a special stove seem to be a very small inside where wood is burning,so the whole outside stove was made of nice art ceramic figurines who discipste the eat well,french first settler in Canada should have visit Russia to see how to heat efficiently,sailors didn't catch the concept do Many died
insulation will help a little as you want to maintain the temperature at the level where pyrolysis happens - but in order for it to burn you will want fresh oxygen - maybe preheater for the air inflow would help too
VERY difficult to HEAR your vids,,,,, I can hear 90% of all tubes that watch,,, I can always run them down ,,, but its tough to turn them up if the audio simply isnt there,
are you sure you don't have a problem your end mate - there is nothing wrong with he audio my end and you are the. only person complaining of an audio problem so far - please check and I will check my end again
I know you asked for Robert, but in the mean time, "Starlite" is essentially a carbon foam that works well as a temporary insulation; NASA uses a much higher grade for ablative shielding on re-entry craft that is considered single use. For permanent installation, you're much better off with a combination of sand, alumina (aluminum oxide) and perlite/limestone. If you want to be really fancy, you can do a top coat of silicon carbide as your hot face; the proverbial ceramic hot side.
I think starlet is great for single use - but my understanding is it only really becomes insulating once it is a carbon foam - paper does that too incidentally which is why a closed book is so hard to burn - hmmm!
@@ThinkingandTinkering The man, the myth, the legend! Thank you very much for the response Brother! I absolutely appreciate your videos and the knowledge you’ve contributed to my off grid build!! Thank you once again!
it's active transport mate - the evaporation from the leaves helps too I believe - I remember this warlock at - but I am not sure where - I can look see
@@ThinkingandTinkering sorry I haven't been around lately but life has thrown me a few curve balls. Will still support you and drop by as often as possible. You have my subscription till the day the Lord calls me home.
Hi Robert, Supperb Wallace & Gromit Channel you have here. I would be eternally grateful if you can tap your big brain to explain in laymans terms how i can separate glucose from fructose without using any acid or chemicals. Thanks.
A word to the wise: little metal cook Rocket Stoves are very cool and useful. They will last a good long time if not insulated and kept small. If you plan a larger version or wish to insulate to improve efficiency, use a refractory material! Temperatures inside can exceed 1000c. Combined with excess oxygen, this will burn out mild steel and even degrade stainless steel dramatically.
nice tip mate - cheers
@marthale7
It will. Refractory tends to be somewhat insulating, moves heat away from the combustion area slower and will approach saturation quicker (unless the metal is insulated, which is a bad idea).
Part of what makes rocket stoves efficient is concentrated heat inside the combustion area. It's why the best practice is to NEVER remove heat to your uses from the combustion unit itself.
Use refractory, insulate it well from the feed to the top of the riser (it's not considered to be a "chimney" for reasons too complicated to discuss here now) and take heat to your uses after (and only after) the top of the riser. This will insure more complete combustion for most of your firing time.
@@ThinkingandTinkering
Thank you sir. You do great work on this channel! Thanks for what you do.
@marthale7
A way to improve without having moving parts is good proportion. The general recommendation is 1:2:4 (feed:horizontal:riser). Shortening the horizontal bit and lengthening the riser part will go a long way, especially with smaller stoves. A little metal cooker can really rip with a proportion of 1:2:5 or 6.
@marthale7
Only problem with a BatchBox is that it looks so much like a standard firebox that the uninitiated will treat it as such. Stuffing wood against the throat or trying to damp them down are the worst for batch boxes and they're the first things people try to do!
I ran across this video Robert and have to say you really did your homework. A pleasure to hear this lecture of a very old method used for heating whatever. Job well done for sure.
3:14 I would like to correct a misconception about gasifiers (since I work for a company that makes biomass gasifier gensets). Gasifiers don't collect the decomposition products of wood as-is, because too many of these products condense into acids ("wood vinegar", or pyroligneous acids) and tars. Gasifiers are refineries that convert the crude feedstock of biomass into a gas that is compatible with an internal combustion engine, and these acids and tars make the gas unfit for use in an engine. What gasifiers do is combust these tars and acids, and thermally crack the rest into lighter non-condensing gases, then send these through the hot charcoal to carry out reduction reactions. The reduction reactions react CO2 and H2O with hot charcoal. When the carbon in charcoal is hot, it has an incredible oxygen affinity, and will readily rip oxygen right off of CO2 and H2O to release CO and H2 gas, while the oxygen that got removed in the process combines with carbon to form CO gas from the charcoal. Since CO and H2 gases are both flammable and non-condensing, they are safe to feed into an internal combustion engine.
A lot of folks get the idea that a gasifier is just something that collects the thermal decomposition products of heating wood, and Nighthawk In Light made a bunch of videos that spread this misconception. What he made wasn't a gasifier; what he made was a pyrolyzer. Pyrolysis is only one of the five processes of gasification. The gasification that was used to power cars during the world wars (when all the petroleum went to the military first and foremost) did not send pyrolysis gases into the engines; they burned this and carried out reduction reactions using the CO2 and H2O from combustion reacting with the charcoal that resulted from pyrolysis. The resulting mixture of CO and H2 diluted with atmospheric N2 is what went into the engine.
I had only heard about rocket stoves and wondered what the fuss was all about. Thanks for your tutorial. Knowing how things work is a big benefit to someone like me.
I've combined a Dakota firepit and gasifier and a rocket stove. The efficiency is amazing.
In what orientation? To what end?
You got an upload for us to see
Yes, please do share it 🙏
I Just had that sort of thought while he was talking. running a gasification unit off the heat of the chimney, funneled back into your fire box to get a more complete burn. I'd love to see that setup.
awesome - have you done any vids?
Great review thanks! 👏
It's plain awesome how a few tweaks can improve so much 🎉
yep - especially if you keep the basic principles of what you are trying to d o in. mind
God bless you rob , your channels are always my favourite sources of information and entertainment. The only channel I press like before the video starts ! Thank you!
brilliant! one of the best-- if not the best-- explanations of the burn process. Please do more. you are a gifted teacher and obviously know your subject. Please talk more about the molecular structure of wood and how the components break down under heat, what temperatures, and how their molecular structures break apart and form different molecules. thanks again!
oh wow - cheers mate - I know it seems odd but it really is a fascinating subject
I'm experimenting with tin can stoves, double walled, dog food and hotdog tins, holes and a fan shaped lid at the bottom to turbo it up.
5 litre paint can , say 12 of ¾ inch holes around the bottom just ½ inch above the base . Holes punched through with sharp knife with a horizontal and vertical jab per hole,, kinda square holes thus ,, . No holes at top for exhaust gases but use ½ or ¾ inch diameter metal pipe,,, small section of green branch works too,,, across top as spacing for exhaust escape that pot/pan sits on. Lasts for 6 months of regular use . However 6 building bricks nicely circle it when placed vertically side to side around for support of some really heavy cookpots to also give wind protection. It'll do ten litres of soup fine .
@@michaelcorbidge7914 Nice one.
wow - interesting - how's it going ? any vids?
The Roman's had heated flooring?... 😲😳
Bloody hell, that's wicked 😅
This channel is one of the best. Thanks again Rob.
oh wow - cheers mate and thanks for taking the time to say that
I like to play around with/experiment with different ways to cook from candles to gas, Ive cooked over oil lamps and it works but you need a way to keep the pot off the chimney so in an emergency its doable but complicated. A Dietz D Lite Lantern has a flat spot on top that you can balance a small pot on and the flame can still breath... Rocket stoves are pretty amazing with how little fuel is needed to boil water or cook a meal.. a 28oz soup/bean can as the main body and a small 6oz juice can as the fuel feed can run on a couple handfuls of twigs
nice mate - cheers
you can dig a rocket stove if you are lacking materials to make one.
I think the Dakota pit fire is just a folded up rocket stove in the ground. Might be worth looking into.
In future would you increase your audio levels as I watch on tv and I have to adjust the level every time I watch your brilliant ideas. Thanks 👍👍👍
Speaking lower is a leadership skill, it indicates confidence. It can also be taught as a mind trick. Our task is to recognise it for what it is when used.
@@peterclark6290 When duplicated for video, volume is somewhat irrelevant vs your quality of microphone. I watch these on my pc with studio speakers and have to crank it up, too, then remember to turn it down before I go to the next vid.
cheers mate - I will try
great explanation!
Thank you RMS DVD:)
cheers mate
Yes the Romans in Bath in England had a very efficient setup for obtaining every last scrap of heat from the firewood they used
amazing isn't it
What did they do Michael?
dang Robert ,thanks , I have been searching for more info on these . Some one else asked too , next up any chance of how to do a gassification column with one of these , for a complete clean burn or recyle for fuel ,of plastics . This has been done very succesfully , beyond 2000 did a story [ a quarter century !!?? ,NOOO ].,so far no municiple organisation that i've heard of has done a thing !?. Seems private organisations and individuals are though . My understanding is only real hazard is PVC's [ that can be done ] ,but burning or making a diesoil is quite simple .
I like that idea mate - I will look at it
3:38 looked suspiciously like the electric fire my nan had.
Did you use a new camera here ?
The shot seems wider - the lighting seems a bit more yellow - the volume was also way lower. Oh, too much ceiling, not enough table. :-)
I do love the time you are spending on the rocket stoves - explaining the efficiency is awesome.
no - I am not quite sure what that happened
Interesting,once in Russia I visited a monastery with a special stove seem to be a very small inside where wood is burning,so the whole outside stove was made of nice art ceramic figurines who discipste the eat well,french first settler in Canada should have visit Russia to see how to heat efficiently,sailors didn't catch the concept do Many died
Would any well placed insulation noticeably improve the operating range *requiring less fuel to get a reliable full burn?
insulation will help a little as you want to maintain the temperature at the level where pyrolysis happens - but in order for it to burn you will want fresh oxygen - maybe preheater for the air inflow would help too
VERY difficult to HEAR your vids,,,,, I can hear 90% of all tubes that watch,,, I can always run them down ,,, but its tough to turn them up if the audio simply isnt there,
are you sure you don't have a problem your end mate - there is nothing wrong with he audio my end and you are the. only person complaining of an audio problem so far - please check and I will check my end again
Good video as usual!
cheers mate
New old tech ..... Love it!
what's not to love lol
@@ThinkingandTinkering Being somewhat vintage myself ...... I concur! ;o)
Robert can you build an anti heatwave machine please
Check out night hawks latest video
the heat wave is harsh - I'll have a think mate - cheers
Thank you Robert!! I was wondering your thoughts on using “Starlite” as an insulating material for the water heater you built from a rocket stove?
I know you asked for Robert, but in the mean time, "Starlite" is essentially a carbon foam that works well as a temporary insulation; NASA uses a much higher grade for ablative shielding on re-entry craft that is considered single use. For permanent installation, you're much better off with a combination of sand, alumina (aluminum oxide) and perlite/limestone. If you want to be really fancy, you can do a top coat of silicon carbide as your hot face; the proverbial ceramic hot side.
@@C-M-E Thank you very much for the response Brother!
I think starlet is great for single use - but my understanding is it only really becomes insulating once it is a carbon foam - paper does that too incidentally which is why a closed book is so hard to burn - hmmm!
@@ThinkingandTinkering The man, the myth, the legend! Thank you very much for the response Brother! I absolutely appreciate your videos and the knowledge you’ve contributed to my off grid build!! Thank you once again!
Very informative keep up the good work......
A piezoelectric vibration at the top, with a fan and a moisture collector, gravity
cheers mate
Bob, a large tree can raise a lot of water without burning anything, the wick effect, cigarette butt in water
it's active transport mate - the evaporation from the leaves helps too I believe - I remember this warlock at - but I am not sure where - I can look see
😊
Please do a video on nitinol
👍👍👍
cheers mate
Firstly, all that cellulose explains the energy in wood and secondly explains why in an open fire there is so much carbon or charcoal left over
cheers mate - glad it helped
@@ThinkingandTinkering sorry I haven't been around lately but life has thrown me a few curve balls. Will still support you and drop by as often as possible. You have my subscription till the day the Lord calls me home.
Very interesting...only, there aren't any forests on Earth. If you plan to burn something, better plant some trees and wait 20 years.
indeed
Is this a video for Europe to overcome gas crisis?🙃
What about concrete rocket stoves?
u need to fix volume on ur video sir
Hi Robert, Supperb Wallace & Gromit Channel you have here. I would be eternally grateful if you can tap your big brain to explain in laymans terms how i can separate glucose from fructose without using any acid or chemicals. Thanks.
hmmm - that will be a challenge - interesting - cheers mate
Cooling and then filtering should do the trick (glucose has lower solubility than fructose).
@@bravante5927 thanks. Will give it a try...
Paper darcy stix as fuel?
awesome mate - to my mind that is clever thinking
For me the audio/volume is way too low