If you put a metal sleeve over the outside, you'll get much better heat transfer. Right now you're only getting conduction. Adding an outer sleeve will help retain some of the heat and allow for convection as well.
@@d0uble_O No, just another larger diameter steel sleeve. Leave it open on the bottom, and the rising heat would induce convection to transfer more heat to the entire surface of the copper pipe. The copper pipe would be sandwiched between the inner steel burner can and an outer steel sleeve.
Was looking for this suggestion and was going to write it myself. Wrap the outer sleeve with some insulation and concentrate the heat transfer to the tubing
If you move that coil up past the top of the chimney you will get hot quicker. The copper tube will get soot on it. I built a similar unit and was able to put out about a half gallon a minute of steaming hot water using no pump, just a check valve basically designed lime an electric percolator coffe pot. I like your setup very neat and clean. Great job!
5 gallons of water from 37°F to 140°F within one hour means you have achieved an average heating power at around 1.2 kilowatts. Putting the bucket directly on top of the flames, you propably would have had more than twice the power (but a sooty pot base)
If you know @ 25 °C the volumetric heat capacity of the water is 4 181,3 J⋅kg-1⋅K-1, then if you have the starting temp, the final temp et the amount of water it's easy ;) 😁
@@stevothegreat hot water rises to the top as it's lighter. And cold water sinks to the buttom. So the system constantly takes cold water from the bottom of the tank into the heater coil. And as the water gets hot, it circulates back into the tank. This only works if the tank is raised above the fire
Very cool man. If you did a steel pot you could put it on top of fire. Woyluld be cool to see boil time wirhout the copper line on the fire vs with the copper line on fire.
Raise you copper coil higher. The point of the rocket stove is to keep the combustion area hot enough to burn the fuel completely, and that coil is cooling that area.
And insulate the flue too, especially for such a small rocket stove and one made out of steel. You're one of the only other people I've seen who understands the difference between a rocket stove and a stove that is J-shaped.
Would it be a bit more efficient if all the fire had to brush past copper pipe on its way up? Like a “coiled coil” going up inside the chimney leaving inch wide gaps for air to pass. Also fire stone insulation on the outside of the chimney would increase efficiency.
If you are looking for efficiency, this ain't it. You would be better off with a heat exchange sitting above the flue to catch most of the heat for two reasons: the obvious one but also because a rocket stove doesn't achieve regasification until the air is extremely hot, which is why a rocket stove needs to be insulated (this one is not so therefore it's not actually a rocket stove, it's just a stove in a shape that resembles a rocket stove.) By putting the heat exchange on the flue, the water robs heat from it and thus reduces the burn efficiency of an already crippled burn efficiency because not only is it lacking insulation but now the heat is being sapped to warm up water. This video is a case study in why design principles are important to understand before you go redesigning something.
Thats how we heat the shower water in our sauna. The water tank is a thick stainless tank mountes on the wall just above the sauna-stove. Once you get the room up to temp, the water is about ready too.
cool setup, this method has been used for a 100 years to get hot water, pipes running in the fire place in a cabin to a hot water tank, one time the water got so hot it started to boil in the tank, we had to put out the fire.
yep we call em wet backs. they are money savers heating water and the house!! unfortunately in our city, wet backs are banned and any fires require permits. absolutely evil imo.
Super cool idea bro! I used an old transmission cooler with 2 lines and a small battery pump for circulation to heat up my camp shower. This is even better!
My grandparents have a similar thing wrapped around the chimney in their house to aid the hot water system when the fire is on. It's not a complete replacement as the fire isn't always on, but it definitely saves them money on their power bill
I recently did a video where I built a square tube rocket stove with the copper on the inside. So I figured I’d continue to project and compare it to a round stove with copper on the outside.
இநதியா தமிழ்நாடு செட்டி நாடு காப்பர் விறகு கரி பாரப்பரிய பாய்லர் கிடைக்கும்.தேநீர் கடைகளில் பாரம்பரிய சுவைக்காக இன்றும் காப்பர் தேநீர் கரி பாயலர் பயன்படுத்துகிறார்கள்.
Best reply. This is the way! He's just built an inefficient domestic tanked water heater, and you've told him how to make it better. Unfortunately these YT inventors do it for the clicks, not the real science of the thing. There will never be a 2.0 that actually does it right.
Yes, I agree. Also, constrain the hot gasses to run only near the metal surfaces, filling the flue with ceramic fire brick down the center line. Hole saws can make discs of ceramic foam that you can string on all-thread or tubing. If you run the tubing inside, then stretch out the coil slightly, and expose it to hot flue air inside and out, top and bottom. No need to press tight against the flue interior; actually undesirable. I recommend stainless steel tubing instead of copper tubing for greatest longevity, but copper conducts far better.
Since it’s water filled , you could put the coil inside the rocket stove pipe? As long as it is always full when you operate it, it would not burn out the pipes . It might heat twice as fast? Clean off soot with a wire brush once in no a.while.
If placed inside the hot flue gas, stretch out the coil so it is loose, heated on all sides. Dissimilar metals may cause corrosion, so avoid direct contact by using insulating couplings and stand-offs. Hot flue gas rushing up the center is totally wasted. Plug up the center area with a cylinder of firebrick or use closed-off metal tubing.
The thing about any container filled with water is that it cannot get above the boiling point of water. Because it's not pressurised. The water heat up to 100c, and then boils off taking the heat with it. Majority of plastics can withstand 100c. Some might soften a little.
@@DIYToPen that’s why you’re able to boil water in a plastic water bottle over an open fire. I thought it was crazy when I first heard it but the science is sound.
Oh my god, I'm amazed! A "thermosiphon". I went to mechanical engineering school and had no clue you could even theoretically do this and had to look it up to figure out how "no electricity or pumps" made any sense. What an incredible application! Well done! I'm amazed!
Leave it to an engineer to forget that you could just use a metal bucket and put it over the fire 😂. I'm just picking but it is cool that through the heat difference it cycles
I lived on a tiny sailboat for years and years. I only had a wood stove. This is exactly how I heated water. A coil of copper to wrap around the metal chimney attached to a tank. I could also use that copper coil and rigged it up with a pressure cooker and make an ersatz desalinator.
I'm a live aboard, off-grid for 36 years... Put pan of water above chimney of stove (in video) boils quick. There's a YT video of a rocket mass stove (in house) height, width, length of a snooker table (also heated water) .. bit too heavy for my boat.
I have done the samething with my hot tub it will reach 120° from 45° in 40 minutes. A friend asked if it would would for a so I built and his shop floor is the only heat in the shop. Inside the shop is about 65° with outside temp of 28° not bad. Just make sure you don't stand the floor for to long in one spot your feet start to get warm. Now his wife wants one in the house also.
Yes, the principal is easy. Hot water rises, and cold water goes down . We had our central heating going that way and our hot water cilinder too . All on gravity feed . But you have to lay the pipes in a particular way , and the pipe has to be thicker . Made a boiler in our wood stove. Done many years of service. We had no electricity at that time .
@@bryniebear3547That's right and also they used copper for the cabling inside the pyramids. I mean, they hadn't been able to paint the Pharaos' bedroom without decent illumination, had they?
Exact same principle as an old gravity feed hit water boiler. The boiler below heats the water and the water rises and circulates up to the bucket-house, heating it and returning back downstairs to the boiler. Nice. You half way invented home heating from the 40s on up.
This is called natural circulation. Gravity feeds water to the coil from the bottom and as it heats it rises and flows back to the bucket via the top tube. if you increase the efficiency by sleeving the coil and insulating the bucket (or other tank) you will turn this from a hot water heater to a steam generator. If you turn the bucket into a pressure vessel you can then use the steam to propel a prime mover / electrical generator set up. electricity from a wood burning rocket stove would be pretty cool!
@@ElkGuide2024 sorry I meant that reply for a different comment. The full build of this stove is up on my channel if you are interested. I also have one that has the copper built on the inside of the stove on direct flame. Glad to have to apart of the channel!
Nice build. Colder water moves to the bottom, while hot water moves to the top (convection). So, if you swap the bucket terminals, you should have a faster heat transfer....
pretty cool setup up. 2 ways I can see improving this: (1) your thermal interface between the coil and the tube needs to be improved. it is a function of surface area and the conductance of the interface. Because the tube is round you're only touching as a single point (think circle & tangent lline). find a thermal interface foam. (2) you're losing heat on the tube going out to the bucket. Add some insulation.
We do this as well,but only we had our water lines going into a full size air mattress that was in the bed of our truck. Hot shower's for all before bed. Put your copper directly in the fire with a constant supply of cold water from the creek.
We made almost the same thing many years ago in Kirkland Lake. We wrapped the copper pipe around the chimney pipe. I wend direct to a 10 gallon container and then gravity fed to a shower head. It doesn't take long to heat it.
Maybe placing insulator around the pipe coil? Something that wouldn't melt, like cement or stone? You could conserve energy and heat up the water faster.
Me too, but people are saying that you have to place the heat source "below" the water you are heating...is this true? I can't think of why it would be?
@ct1freak not my finding to this point, the cold water outlet from the tub must be near the bottom, pumped to and enter the heat source near its bottom, run through the coil upwards and exit the heat source at the top and then move back to the tub...
Was wondering if you split the top pipe to 4 smaller ones that you then have wrapped with copper and outer sleaves - you increase the surface area and hopefully more heat transfer.
Use 1/4" copper and it will be much more efficient. I built my first wood burning water heater decades ago. You can increase efficiency by using smaller tubing an just making it longer . You'll also get an increase if you add insulation around the outside of the copper. Just understand that if you do all that it will get so hot so fast it will melt through the rubber hose and plastic bucket. You'll get water coming out closer to 200°f . If you slow the water flow input it will come out as steam at 220° or higher.
This seams like it could be a good idea to help heat the floor during winter months. If able to be incorporated to an existing wood stove. Very interesting good share!❤
That’s a warm idea. No electricity how to circulate the water? Solar pump would be great. Some mention 1.2kw maybe can warm a small room. then have to add wood so often. Thanks for sharing your built ❤
Use a metal bucket so you're not boiling plastic into your water. Put an outer cover on the copper to keep it from off gassing it's heat into the air, and make sure the stove can slip in and out of the coil since heat scales and thins steel so you can replace the stove. Looks good.
Add the center out of a gas hot water tank flue pipe. The baffles will slow the heat escape and provide more heat transfer to the copper. Just slowing down the exhaust a little will help efficiency
sweet build! I sometimes use this heat transfer cement on steam tracing at the refinery I work at, would work great to cement over the copper coil to the pipe for pretty efficient heat transfer
I feel like the efficiency is kind of lost here because all of the heat is exiting the top you're getting a small amount through the sides. Also, is that just a piece of stainless steel pipe with a 45°, straight, then 90° Bend in it? Is that all it takes to fab up a rocket stove?
What is stopping in putting the water vessel over the flame? This will ensure better use of heat as well as avoid flowing of hot water through the plastic pipe.
I had an intention to add a system to my would stove. However I was going to use a radiator. But now I can use a bucket instead and eliminate the pump. It would be good instead of waking up at night and add wood.
If the coils were on the inside of the pipe would make more sense for faster heating. You still could use the top to heat a frying pan or what ever you wished with the right design.
![CAMPปลิ้น | EP.83[2/2] ประสบการณ์ขนหัวลุกจากตำนานวงการผี!](http://i.ytimg.com/vi/T_kFecQw7Ds/mqdefault.jpg)
Thanks for 3M views!! ❤❤
This is awesome
That's such a clean design and the welds look amazing 👍
What happens when the watrer in the coil boils? It turns to steam and eexplodes.
BPA water!
@@newbluerugby copper doesn't have a BPA coating genius.... SIGH
Go whinge about your chemtrails .... LoL
If you put a metal sleeve over the outside, you'll get much better heat transfer. Right now you're only getting conduction. Adding an outer sleeve will help retain some of the heat and allow for convection as well.
you mean like the ceramic/titanium wrap for exhausts?
@@d0uble_O No, just another larger diameter steel sleeve. Leave it open on the bottom, and the rising heat would induce convection to transfer more heat to the entire surface of the copper pipe.
The copper pipe would be sandwiched between the inner steel burner can and an outer steel sleeve.
Was looking for this suggestion and was going to write it myself. Wrap the outer sleeve with some insulation and concentrate the heat transfer to the tubing
And pipe the exaust downward to increase efficiency.
If you move that coil up past the top of the chimney you will get hot quicker. The copper tube will get soot on it. I built a similar unit and was able to put out about a half gallon a minute of steaming hot water using no pump, just a check valve basically designed lime an electric percolator coffe pot.
I like your setup very neat and clean. Great job!
I wouldn't advise drinking or washing in water that was near boiling point while in Vinyl.
Definitely not.. this is just a test setup for a video. using clear lines to be able to see what’s happening
Shower an dish washing water.
It's probably food grade tubing
@Shojohn11 I think he means the bucket. If it was a food grade, non leaching, it would probably be okay.
@@kdigiacomoGotcha, that makes sense thanks
5 gallons of water from 37°F to 140°F within one hour means you have achieved an average heating power at around 1.2 kilowatts.
Putting the bucket directly on top of the flames, you propably would have had more than twice the power (but a sooty pot base)
If you know @ 25 °C the volumetric heat capacity of the water is 4 181,3 J⋅kg-1⋅K-1, then if you have the starting temp, the final temp et the amount of water it's easy ;) 😁
Probably wouldn't get much soot as the fire looks to burn pretty clean.
Probably a hole in the plastic pot shown as well
How is the water circulating through the system ?
@@stevothegreat hot water rises to the top as it's lighter. And cold water sinks to the buttom. So the system constantly takes cold water from the bottom of the tank into the heater coil. And as the water gets hot, it circulates back into the tank. This only works if the tank is raised above the fire
Muy buen invento !!!! Una pregunta, cuál sería la altura máxima que podrías poner entre el roket y el balde ?
Is there a reason the copper coils are on the outside rather than the inside?
Yes, I have already built that and have a full video of it.
Very cool man. If you did a steel pot you could put it on top of fire. Woyluld be cool to see boil time wirhout the copper line on the fire vs with the copper line on fire.
My uncle has one just like this in his shed off in the woods. Doesn’t want anyone talking about it though for some weird reason.
😂😂😂lol, because it has something to do with a bright shining moon?
He's distilling water, don't give the boy ideas.
so stop talking about it
Moonshine
@@mulberry9292 😅😅😅😅
Well played sir!
Great for a camp shower, we used to set up 55-gallon drums painted black and the water was super hot from the Sun in Arizona
In Arizona I would want a cold shower
@@SteRob-ky1wtyou'd be surprised. The high country in AZ is just as cold as anywhere else
@SteRob-ky1wt No doubt. I was a surveyor in Zona and used to dump gallon jugs of water over my head in the 115 degree summer.
Thanks!
Facts @@desertBirdDogs up there near the San Francisco peaks in coconino county it gets extremely cold.
Raise you copper coil higher.
The point of the rocket stove is to keep the combustion area hot enough to burn the fuel completely, and that coil is cooling that area.
And insulate the flue too, especially for such a small rocket stove and one made out of steel.
You're one of the only other people I've seen who understands the difference between a rocket stove and a stove that is J-shaped.
Would it be a bit more efficient if all the fire had to brush past copper pipe on its way up? Like a “coiled coil” going up inside the chimney leaving inch wide gaps for air to pass.
Also fire stone insulation on the outside of the chimney would increase efficiency.
If you are looking for efficiency, this ain't it.
You would be better off with a heat exchange sitting above the flue to catch most of the heat for two reasons: the obvious one but also because a rocket stove doesn't achieve regasification until the air is extremely hot, which is why a rocket stove needs to be insulated (this one is not so therefore it's not actually a rocket stove, it's just a stove in a shape that resembles a rocket stove.)
By putting the heat exchange on the flue, the water robs heat from it and thus reduces the burn efficiency of an already crippled burn efficiency because not only is it lacking insulation but now the heat is being sapped to warm up water.
This video is a case study in why design principles are important to understand before you go redesigning something.
Now you just have to put the chimney/exhaust under the water heater to capture even more of the heat.
Then he'll have built a regular hot tub.
Technically it would be called a water heater @@velianlodestone1249
Thats how we heat the shower water in our sauna. The water tank is a thick stainless tank mountes on the wall just above the sauna-stove. Once you get the room up to temp, the water is about ready too.
@@TheMagicalTouchGood idea
you forgot to mention that depending upon where you live, it cost from $0.00 to $0,40 to have enough hot water for a shower.
My grandpa has something like that in his back yard but he stores his water in clear jars instead of a bucket
Put a stainless coil on 40 % better heat propagation...
@@RandyHodder-z1kDisculpame, no es así, el acero inoxidable es un mal conductor de temperatura.
Jajaja 100% alcohol
Mine too! Right next to his special okra plants.
Dowwwwn the road here from me, there's an old holler treee
cool setup, this method has been used for a 100 years to get hot water, pipes running in the fire place in a cabin to a hot water tank, one time the water got so hot it started to boil in the tank, we had to put out the fire.
yep we call em wet backs. they are money savers heating water and the house!! unfortunately in our city, wet backs are banned and any fires require permits. absolutely evil imo.
wow very efficient at 6%. not bad at all. very fast too.
Super cool idea bro! I used an old transmission cooler with 2 lines and a small battery pump for circulation to heat up my camp shower. This is even better!
My grandparents have a similar thing wrapped around the chimney in their house to aid the hot water system when the fire is on. It's not a complete replacement as the fire isn't always on, but it definitely saves them money on their power bill
It's good idea and I've considered it but don't make system like that closed on both ends at once. If it boils it will blow
Cover the copper with insulation and another layer of pipe and it will gain some more efficiency! Kind of like a diesel steam cleaner
Yeah I’m going to try exhaust wrap and see how that does.
@@PatrickRemingtonIve heard superwool is the way to go
@@PatrickRemington. Wood stove gasket material worked fine on my Hooker Headers on 650 Yamaha.
Diesel steam cleaners or the kettle as we call it have the tubes in the fire
@@ninetyninerising9482asbestos 👌🏻
Is there a reason the copper is on the outside of the exhaust? Or just easier for testing?
I recently did a video where I built a square tube rocket stove with the copper on the inside. So I figured I’d continue to project and compare it to a round stove with copper on the outside.
Yeah I thought it looked rather backwards.
I'm gonna guess the copper on the inside works at least twice as well if not better.
@@charmio It has definitely been a proven method for at least 150 years it's how boilers operate.
@@JayRSwan
Steam Locomotives ran hot flue gas through many parallel copper tubes. Boiler water outside.
இநதியா தமிழ்நாடு செட்டி நாடு காப்பர் விறகு கரி பாரப்பரிய பாய்லர் கிடைக்கும்.தேநீர் கடைகளில் பாரம்பரிய சுவைக்காக இன்றும் காப்பர் தேநீர் கரி பாயலர் பயன்படுத்துகிறார்கள்.
How does the water in the bucket heat up? How does the water circulate?
Build one out of 4 inch, then weld a 6 inch sleeve around it that could be completely filled with water. 100% constant contact
If what your saying is as im picturing it would loose its pumping action....
I was thinking just build the flame tube into the side of a stainless steel bucket with a tap at the bottom, like a tea urn.
You've created a pressure vessel and therefore potential explosion .
You'll need a thermostat like in a car motor.
For reliable psi relief
@@scriptonite2182 the top can be left open ...
Best reply. This is the way! He's just built an inefficient domestic tanked water heater, and you've told him how to make it better. Unfortunately these YT inventors do it for the clicks, not the real science of the thing. There will never be a 2.0 that actually does it right.
Put the copper tube IN the rocket stove. The heat transfer will be way higher.
Anyways well done. Looks like a fun project.
Yes, I agree. Also, constrain the hot gasses to run only near the metal surfaces, filling the flue with ceramic fire brick down the center line. Hole saws can make discs of ceramic foam that you can string on all-thread or tubing.
If you run the tubing inside, then stretch out the coil slightly, and expose it to hot flue air inside and out, top and bottom. No need to press tight against the flue interior; actually undesirable.
I recommend stainless steel tubing instead of copper tubing for greatest longevity, but copper conducts far better.
That would be cool if it was hooked up to an in-floor heating system
They make those. Usually uses a glycol fluid in the system.
in-floor heated tent, way cool!
they use pumps because natural heat movement of water wouldn't be enough and it would overheat
Yes. And working on petrol and also remotely connected to an app
So if you put the copper coil inside the tube wouldn't it heat better? Wouldn't the water in the tube keep the copper from getting too hot?
Did it get hot enough to melt the bucket before you turned it off?
Since it’s water filled , you could put the coil inside the rocket stove pipe? As long as it is always full when you operate it, it would not burn out the pipes . It might heat twice as fast? Clean off soot with a wire brush once in no a.while.
If placed inside the hot flue gas, stretch out the coil so it is loose, heated on all sides. Dissimilar metals may cause corrosion, so avoid direct contact by using insulating couplings and stand-offs.
Hot flue gas rushing up the center is totally wasted. Plug up the center area with a cylinder of firebrick or use closed-off metal tubing.
Curious about what the melting point is for the plastic bucket 🪣? I probably wouldn’t drink the water but I’m sure it’s good for a hot bath! 😊
The thing about any container filled with water is that it cannot get above the boiling point of water. Because it's not pressurised. The water heat up to 100c, and then boils off taking the heat with it. Majority of plastics can withstand 100c. Some might soften a little.
@@DIYToPen that’s why you’re able to boil water in a plastic water bottle over an open fire. I thought it was crazy when I first heard it but the science is sound.
@@kenmccrady1228 you can boil food in a paper pot this way i've heard
@@felixfarquharson science is so cool, isn’t it?
You have to move tubing 4” higher and insulate as you are losing so much heat.
The pipe is cooler the higher it goes.
Had a similar setup 4 55gallon drums. Each drum had 45 ga. Manifold setup for the tubing. Heating chicken coop and rabbit hutch. Worked great.
Oh my god, I'm amazed! A "thermosiphon". I went to mechanical engineering school and had no clue you could even theoretically do this and had to look it up to figure out how "no electricity or pumps" made any sense. What an incredible application! Well done! I'm amazed!
Leave it to an engineer to forget that you could just use a metal bucket and put it over the fire 😂. I'm just picking but it is cool that through the heat difference it cycles
@@1badombre82😅
This is amazing 👏 does this create flow in the coil? Or only heat transfer?
The heat makes the water cycle
Sleeve around the copper and move the copper up to the top of the tube where it’s hotter.
I lived on a tiny sailboat for years and years. I only had a wood stove.
This is exactly how I heated water.
A coil of copper to wrap around the metal chimney attached to a tank.
I could also use that copper coil and rigged it up with a pressure cooker and make an ersatz desalinator.
Nice!! But according to these comments, THIS IS THE MOST INEFFICIENT WAY POSSIBLE!! 😂😂😂
Où trouve t'on le bois sur un voilier 😂
dans mon petit casier a' acool😉
I'm a live aboard, off-grid for 36 years... Put pan of water above chimney of stove (in video) boils quick.
There's a YT video of a rocket mass stove (in house) height, width, length of a snooker table (also heated water) .. bit too heavy for my boat.
@@PatrickRemington everyone's an expert! If it works, it ain't stupid and all that.
I have done the samething with my hot tub it will reach 120° from 45° in 40 minutes. A friend asked if it would would for a so I built and his shop floor is the only heat in the shop. Inside the shop is about 65° with outside temp of 28° not bad. Just make sure you don't stand the floor for to long in one spot your feet start to get warm. Now his wife wants one in the house also.
Thanks for supporting advance auto parts sir, we appreciate your business.
Yes, the principal is easy. Hot water rises, and cold water goes down . We had our central heating going that way and our hot water cilinder too . All on gravity feed . But you have to lay the pipes in a particular way , and the pipe has to be thicker . Made a boiler in our wood stove. Done many years of service. We had no electricity at that time .
Reminds me of when Moses wandered for years, searching for twenty feet of copper tube he could use to heat a primitive shower.
Dude, copper was fairly common in ancient Egypt. Archeologists believe the stone for the pyramids was carved using copper chisels
@@bryniebear3547thats a joke right. Lol
Copper vs. stone, stone always wins@@bryniebear3547
@@bryniebear3547That's right and also they used copper for the cabling inside the pyramids. I mean, they hadn't been able to paint the Pharaos' bedroom without decent illumination, had they?
I thought Moses needed the copper tubing for a pot still, something about needing to turn the water into wine or whatever.
That’s called a tankless coil brother
They’re in most boiler and hot water heater systems already
I've always wanted to try this but with a hot tub
We did the same process in a hot-tub on a trailer for a mountain party. Work perfect!
Same!
Yeah, yah really just want to soak up all the micro plastics into every pore of your body
@@blablableep6811 is showering with city water any better?
@@blablableep6811lol you guys won’t stop with that crap. It makes you sound like the craziest of conspiracy theorists.
So if you ran the lines through the tent flap, had the stove outside and bucket inside?
..niiice. thanks for posting and displaying your brainstorms of complex simplicity for better efficiency.
Keep informing the people...
Thats actually awesome
Thank you!
Exact same principle as an old gravity feed hit water boiler. The boiler below heats the water and the water rises and circulates up to the bucket-house, heating it and returning back downstairs to the boiler. Nice. You half way invented home heating from the 40s on up.
Actually, gravity fed boilers were around in the 18th century already.
You need the tube in the flame
Got a whole build video on that: th-cam.com/video/8eu87nutyOM/w-d-xo.htmlsi=2_TxH0weh9cy1g7A
It could easily melt the copper
@@DMIsREAL use a material that won't melt - copper melting point is 1900 degrees tho
@@malootua2739. I liked the idea of just setting a steel container on a fire.
This is called natural circulation. Gravity feeds water to the coil from the bottom and as it heats it rises and flows back to the bucket via the top tube. if you increase the efficiency by sleeving the coil and insulating the bucket (or other tank) you will turn this from a hot water heater to a steam generator. If you turn the bucket into a pressure vessel you can then use the steam to propel a prime mover / electrical generator set up. electricity from a wood burning rocket stove would be pretty cool!
As an outfitter in NW Montana, this may change the game as far as showers now! I just subscribed!
@@PatrickRemingtonI don't get what your saying. I was being serious. Instead of using propane or solar, this would be nice! Nevermind!
@@ElkGuide2024 sorry I meant that reply for a different comment. The full build of this stove is up on my channel if you are interested. I also have one that has the copper built on the inside of the stove on direct flame. Glad to have to apart of the channel!
At what temp does the plastic tube melt? Just wondering what kind it is,
Nice build. Colder water moves to the bottom, while hot water moves to the top (convection). So, if you swap the bucket terminals, you should have a faster heat transfer....
You can have a second coil of copper tubing that is plunged down at the top of the stove. The tube wont melt if it is full of water.
If you put a regular flame over a pot you'll get to that temperature in about 5 minutes. What is this supposed to improve on?
pretty cool setup up. 2 ways I can see improving this: (1) your thermal interface between the coil and the tube needs to be improved. it is a function of surface area and the conductance of the interface. Because the tube is round you're only touching as a single point (think circle & tangent lline). find a thermal interface foam. (2) you're losing heat on the tube going out to the bucket. Add some insulation.
I like the stove...so mch fire with less wood...can u share how it was made?
I'm wondering if you could highly increase the efficiency if you put the coil inside the tube so the hot gases are flowing around it
We do this as well,but only we had our water lines going into a full size air mattress that was in the bed of our truck. Hot shower's for all before bed. Put your copper directly in the fire with a constant supply of cold water from the creek.
We made almost the same thing many years ago in Kirkland Lake. We wrapped the copper pipe around the chimney pipe. I wend direct to a 10 gallon container and then gravity fed to a shower head. It doesn't take long to heat it.
Maybe placing insulator around the pipe coil? Something that wouldn't melt, like cement or stone? You could conserve energy and heat up the water faster.
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Any plans on incorporating a steel bucket?
I might try this on an outdoor hot tub. Thanks for the idea!
Me too, but people are saying that you have to place the heat source "below" the water you are heating...is this true? I can't think of why it would be?
@thestcroixkid
Place the tub on bricks and dig a small pit, and place heating source in the pit.
@@nicb1392 it's on a deck
@@thestcroixkidIt won't circulate if it's not below the water source. Heat rises. Cold water sinks and passes thru the tube, gets hot and flows up.
@ct1freak not my finding to this point, the cold water outlet from the tub must be near the bottom, pumped to and enter the heat source near its bottom, run through the coil upwards and exit the heat source at the top and then move back to the tub...
Down drafts outer chamber with secondary combustion preheated air before taking heat for water would ramp the efficiency up greatly.
Was wondering if you split the top pipe to 4 smaller ones that you then have wrapped with copper and outer sleaves - you increase the surface area and hopefully more heat transfer.
That’s great we will be checking for the whole video…keep up the great work!!!👋😃👋
Use 1/4" copper and it will be much more efficient. I built my first wood burning water heater decades ago. You can increase efficiency by using smaller tubing an just making it longer . You'll also get an increase if you add insulation around the outside of the copper. Just understand that if you do all that it will get so hot so fast it will melt through the rubber hose and plastic bucket. You'll get water coming out closer to 200°f . If you slow the water flow input it will come out as steam at 220° or higher.
This seams like it could be a good idea to help heat the floor during winter months. If able to be incorporated to an existing wood stove. Very interesting good share!❤
What use are you heating the water for? Great design. I wouldn't drink, cook, or bathe with it.
That’s a warm idea. No electricity how to circulate the water? Solar pump would be great. Some mention 1.2kw maybe can warm a small room. then have to add wood so often. Thanks for sharing your built ❤
Convection circulates the water. No pump needed. Buy it could help.
Use a metal bucket so you're not boiling plastic into your water. Put an outer cover on the copper to keep it from off gassing it's heat into the air, and make sure the stove can slip in and out of the coil since heat scales and thins steel so you can replace the stove. Looks good.
Well played, man! Bravo!
Excellent work. Just by your thermometer, I knew you were legit.
Like I said earlier it's the smartest design I've seen on TH-cam yet!!!!
How does the water circulate?
Add the center out of a gas hot water tank flue pipe. The baffles will slow the heat escape and provide more heat transfer to the copper. Just slowing down the exhaust a little will help efficiency
Very clean build. (You could also put a stock pot full of water on top) 😉
Look how neatly it's built
Is that siphoning through the hose then?
How do you prevent the hose from melting?
Looks like a clean install for what would be a basic wood-fired hot tub heating element.
I've built one like this. You can use the tube to line the floor of a tent, and it works well.
The model T also used thermal-syphoning to circulate the water, no pumps or anything.
sweet build! I sometimes use this heat transfer cement on steam tracing at the refinery I work at, would work great to cement over the copper coil to the pipe for pretty efficient heat transfer
thinking about those hoses, does it have high temp property?
@@laughingmedication8193 rated for 175f
Would it work if I put the water tank below the level of the stove
So how does the water pump back up to the bucket ?
Consider attaching the tube coming of the top of the rocket tube to the bottom of the bucket may quicken the heating time
I'm curious if that vinyl will melt at the brass fittings considering no pump
I can use this for our pool, when are the plans available
great job! thanks from Brazil
What is the melting temp of your plastic hose?
I feel like the efficiency is kind of lost here because all of the heat is exiting the top you're getting a small amount through the sides.
Also, is that just a piece of stainless steel pipe with a 45°, straight, then 90° Bend in it? Is that all it takes to fab up a rocket stove?
Do you have the hot return to the top of the bucket? The cold line should be the bucket bottom output and bottom input on the stove.
@@mikee6354 cold line is at the bottom of the bucket going to the bottom of the coil
Did you fill the copper pipe with sand so you could bend it without crushing?
Yes there is a full video of how I built this on my page. It's also linked in this short
Does the water circulate itself?
Gravity and heat transfer, genius! 😊
would this work indoor if you extend the flue through the roof?
elegant & simple with a lot of possibilities for variations
Make sure tubing will withstand expected temperatures.
What is stopping in putting the water vessel over the flame? This will ensure better use of heat as well as avoid flowing of hot water through the plastic pipe.
If you do this again I'd be curious about quantity of wood used to heat to this temp.
I had an intention to add a system to my would stove. However I was going to use a radiator. But now I can use a bucket instead and eliminate the pump. It would be good instead of waking up at night and add wood.
If the coils were on the inside of the pipe would make more sense for faster heating. You still could use the top to heat a frying pan or what ever you wished with the right design.
I’ve already done that.. I have a few full length videos on it