Hot Water Rocket Stove K Type Part 2
2019 ж. 6 Қыр.
928 100 Рет қаралды
Good thing come to him that ..... I forget, Its been a long time in the making . Thanks for waiting . Enjoy the drone footage from my brother in law.
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Brother in Law's Awesome Drone: amzn.to/2ZXvoSS
UFO High Bay LED Light: amzn.to/2ZINewN
12 volt hot water circulation pump: amzn.to/34Ft2M2
Hitachi Grinder 4.5 inch: amzn.to/2PWKAzN
Drill and Tap Combo: amzn.to/2ZJ5s26
So your heater has a capacity of 20.902kJ/h. 5.58kJ/s, 1,55Wh. I think you have a decent heater. There are some possibilities to increase the efficiency, but good job!
Might be some international discrepancy in the fractional/thousand separators, but your first and last number is not right. The total enery was 20 MJ, -> 5.56 kJ/s = 5.56 kW. 1 kWh = 3.6 MJ
@@moczikgabor yes, depends on the numbers and significance you use. When I calculate it with the Cp of 4.186 KJ/Kg.K., you get 20.093 KJ > 20 MJ. 5.58 KJ/s is correct. When you use 20 MJ, you indeed get 5.56 KJ/s. The Wh is indeed wrong, don't know why the additional /3.6 came from. It's always good that someone does the calculations over. Good job
@@thelazycat_ I am not complaining by that 0.02 kW difference (I used 4.2 kJ/kg*K), but the wrong magnitude. You seem to have used dot as a fractional separator (as it should be in English) and if that's true, then it is not 20.093 kJ, but it is 20093 kJ which is 20.093 MJ (I just rounded to 20 MJ, but again, I am not hung up the precision). The other value in the original post 1.55Wh, which is not true, nor the unit of measure is right because if you want to express power then it is just Watts. Watthours is an energy measurement. 1 Joule = 1 Ws (Watt*second) 3600 J = 1 Wh 3600000 J = 1 kWh This last one from where that 3.6 comes from, if the units are MJ and kWh then 3.6 MJ = 1 kWh This is also why 5.58 kJ/s = 5.58 kW, because Joule is Ws, thus kJ/s = kWs/s = kW Easy to calculate that 3.6 conversion factor any time you want, but useful to remember as the burning heat of most fuels, woods, whatever are usually given in MJ/unit, we pay the electricity by kWh, so easier to compare prices, heating times and such in human-friendlier units.
I might misunderstood your reply, you probably know all this, but anyway, I leave the above post as is, might be helpful for someone.
i get 7kw with efefficiency 80%. it's close to reality?
I'm Japanese, I love the outdoors, this video is exciting, thank you
Thank you for watching. I like your KZhead channel
I'm happy! !! I look forward to working with you🤗
Anybody that complains "you talk too much" is welcome to watch a youtube vid on 'how to use the volume buttons on your computer'. 😉 (Talking people through projects is right and good).
Sometimes i got bored on project video without naration or without detail explanation of what, why or how.
I appreciate the running narration of what you are doing and thinking out loud because it gives me better understanding of why you do certain things the way you do plus it helps keep the focus of what you are doing much better. Please don’t change your approach to recording what you are doing and why you are doing it. Your videography is superb and your down-to-earth approach is extremely helpful especially with your narration. Thanks so very much for sharing your thoughts and your skills.
Not getting to enjoy your pie is about the most relatable thing ever
I enjoy seeing your family in the video. Your girls are adorable.
Meat pie breaks in every video. :-) Enjoying the rocket stove builds. Not surprised that you are a pro sheet metal fabricator, because your precision on the metal work is impeccable. Glad your KZhead proceeds were able to fund your folder, what an amazing tool and great time saver...a good investment for sure. And for your cardboard cut out method to get the odd shape figured out, a proper "good on ya."
Thanks mate!
You want your water tank higher than your stove and you want to draw the water from the bottom of the tank and the return line slightly above center mass. That's how hot water heaters create thermal layers the bottom is always the coldest with the hot being on the top layers (heat rises) hook it up like that and I think you'll have the best rocket water heater I've seen yet. 👌🏼
CRITICAL: The supply line from the heat box to the storage resevoir needs to be POSITIVE angle, upward slope all the way. Heat (incl. heat in water) only travel UP hill. Any down or negative slope in the line will cause AIR LOCK. Even if just 1 degree it will work, but MUST be 1 degree POSITIVE. Any down or dip in pipe ( as I saw in video will fail). CRITICAL: A plumber experienced in connecting wood stove to HWS did my fire box years ago. He said this is the most common fail that amateurs make. Supply line must be all uphill.
Jeez that’s smart putting a padlockThinking back to my childhood
Reminds me of the old folders we had back at school. Perfect for sheet metal origami. Love your work dude.
They are called a brake, but dont ask me why.
This should be sold in a shop. Great work.
Hot water always rises. So the top outlet pipe from the top of the heat exchanger needs to constantly rise to the top of the storage tank (even in your heat exchanger have a sloping annulus ring to a rising outlet pipe. Have no pockets where steam can be trapped). Similarly, the cold water feed pipe at the bottom of the storage tank should also rise to the inlet of the heat exchanger (this water will eventually get hot too!). These inlet and outlet pipes should be lagged with insulation as well. Also hot water expands so the heat exchanger outlet pipe needs to be a larger diameter than the cold water feed into the bottom of the heat exchanger (experiment with 20mm cold in and 25mm hot out say. You also want to keep friction loss down to aid thermosiphon). If the flue is too hot make the heat exchanger jacket longer and take out more heat. Your heat exchange jacket design is the right approach compared to say copper pipe wound around the flue or in a water tank as this too easily creates steam and danger of pressure buildup. Excellent build by the way and great helpers!
Awesome craftsmanship! The kids remind me of my 3 daughters! God has blessed you greatly, may you cherish your family to a great old age!
Its nice to share with your little ones. Enjoy them while you can. They grow up so fast. Made me smile thinking about my two (18 & 16 now).
I also absolutely Love your family! Your fabrication work is also on point!
My 7 year old niece Emily died Oct 9th . She loved Pepa pig. I'm glad that was in this video. Made me think about things a little different. Great water heater.
Life is so precious, thanks for sharing
Great to have the C/H water ports coming from One Side of the unit. Fantastic.
Amazing. Love the way you talk and work and thanks for sharing 💗
Your workmanship is a thing of beauty! Wow!
I love projects like this. I work where we Spiralweld on a lathe with MIG, Lifeboat Propshafts, Powerstation Steams etc to repair them, we use Ceramic Fibre Wool to wrap stuff to cool it slowly, that would ideal to insulate this!
The thermo-siphon only works if there's a steady rise from the top of the stove outlet to the hot water tank, otherwise it'll vapour lock at the top of the stove . A cheap source of 12vdc pumps is a Toyota Prius inverter coolant pump, low current and submersible if you seal the electrical connections. This stove is turning out very nice , keep up the good work.
Yes, the big 'downwards loop' after it comes out of the top heater port is the problem. Just use a straight length of hose, preferably on an uphill gradient, going towards the barrel. That may also mean, you need to lift the barrel slightly (- say on a pallet), to get the rising gradient on the pipe.
❤️❤️❤️❤️ Love your mad metal skills, video editing & presentation, narration, and most of all, your family! I wouldn’t change a thing. Looking forward to more of your vids.
Brilliant work projecting that front panel's penetrations! You are a very skilled craftsman sir! Don't take any slack on the grinder use, someone who can use one is always impressive!
It's amazing what you can do with a grinder!!
Superb metalwork and I really like that you didn't chuck the chicken off your lathe to part off. I have a Bosch metal cutting jigsaw which I have to say is pretty good. I'm amazed that you can use a grinder with such accuracy. Cutting a circle or ellipse with a flat disc, wow!
I love that, "I cant use my lathe. It's got a chicken on it."
Plumber here and you're right it was heating faster than thermal siphon could move the heat out of the exchanger, so it was flashing to steam. If you start making those things just make the next one with larger pipes if it is supposed to be for off grid were you have no power supply, also in the past when they used thermal siphon in this manner, they would use a insulated tank and hang your rocket stove or burner right on the tank, the shorter the runs the better siphon works. If off grid isn't a mandate than use a pump and consider piping cold to the top of the exchanger forcing the water to go down against the heat it will give you some efficiency gain. I'm from New England and I wish I knew a metal worker/ welder with your skills, nice build! Hope you get the bugs worked out with your new heater.
❤❤❤❤❤ that was awesome build and and you explaining how and why was marvelous rorschach
love watching the build. It has given me some great ideas! In the comments I have not seen anything about your heat extraction position and I believe that is your biggest inefficiency (that and the fact that 95% of your heat is lost up the chimney. Would it not be significantly more efficient to not extract the heat from your burn chamber? Every degree you lower the burn chamber is another level of tar you cannot crack which leads to waste and smoke and ash. The reason people add insulation around the burn chamber is to jack the temperature up to 1800-2000 °F where wood will fully burn, not to increase the heat transfer to the water (though I guess it has that as a modest secondary benefit). You can then use the extremely hot exhaust gasses in a downdraft configuration to shed heat into your working fluid. Of course, that will also burn your stainless, so you'd need a refractory liner. Also, I think Perlite is the perfect insulator for what you are doing. Cheap and light and where rockwool burns at 900 (and the binders well before) perlite can hit your 1800 and keep right on ticking.
When u had that problem towards the end, I thought it was the same mistake I made plumbing up an old crown *5 semi combustion stove to my old 30gal hot water system. Had the top pipe too close to the top on water heater, it used to bubble and boil when it was cranking. Still worked for years. Prob nowhere near as hot as ur rocket stove. Great vid 👍🏻
I rebuilt my Solar Hart in 2009 hot water system. The tin trays were cheap. The most expensive part was I put marine perspex on to cover the trays. Knowing now all I would do is make tin tops. I would go all stainless steel for the heat traps. Copper vacume tubes would be the go as well to cut down on water flow and joins.
Brilliant craftmanship.
'' up '' * Nice Job ! Congratulations ( from Brazil )
Love your metalwork! Brilliant! Regarding the thermosiphon, they will always vapour-lock if the water boils at any point in the tube. Forgive me if i over-explain, but the liquid water will expand as it heats and start to form bubbles of water vapour. If those bubbles can’t get to the outlet as small bubbles, they join together into a large bubble that takes up the whole diameter of the tube and the thermosiphon (or any siphon) will be interrupted. This will then compound because the water will stop flowing, be exposed to more heat, and boil even more. Boiling can be avoided by increasing flow rate. This could be by having a tube with a large enough diameter that bubbles can always get to the outlet before they block the tube, or by pumping water through faster (but then you need power). You will avoid boiling longer (i think) if you pump the coldest water through, that is if you pump from the bottom of your tank. Boiling can also be avoided by reducing the water’s exposure to heat; either have a smaller burn chamber or have fewer windings of your copper tube. Any thermosiphon system will need a bit of fiddling to maximise performance. Top quality build though! And thanks for the great video!
I'll be making something similar in the future (once we move), so I can have a wood fired hot tub. I'll be making it out of cement, most likely using a wooden former (that will be burned away during the initial burn). It will, of course, be a rocket stove like yours. I'll probably bend copper pipe around the flue then wrap that is similar tape to yours, then a fire cement casing. It will have to be set lower than the hot tub, so the flue is at the same level as the water. Self priming, just fill the tub and the tubes will be full of water, passive heat driven flow. Can't wait.
Love your videos mate, really like the plan as you go attitude you have towards the rocket stoves.
Totally engaged by what you made there and it's something that I'm going to do this autumn. Looking forward to following you on more of your projects
Awesome video! Keep up the good work, I enjoy watching videos like this.
Love ya videos, keep em coming! The upper outlet pipe had a dip in it, it has to constantly rise or it wont thermal siphon. Been watching many rocket stove videos lately looking to design one to heat water on my camper trailer (Don't want to use non renewable Gas, using induction cooker, solar etc) and have watched most of yours and this one, well its almost perfect mate. Quite well designed and some great skills showed off in the build process (Not to mention the great memories you are making with your family, makes for a great story for us viewers). Hope ya don't mind me pinching some of your ideas, with a few small modifications for my camp trailer. Assuming I have the skills to build it. lol..
Hi Rolls FPV, two years later...tell us about your project, did it work?
Sorry me again I've just had a look through 200 comments and air nibbler was mentioned a couple of times a cheap one around £30 $Australia 40 ish. One comment has a 20mm bore pipe to middle of tank so the hot water rises and cold water out from bottom a couple said tank above boiler and straight pipes. A couple of questions does it get really cold. Do you want hot water all the time if you want use the system indoors to run your central heating with a high flow pump and indirect water heating. You've got it so right. You're an artist thank you for teaching me something I hope I have helped you
Love this vid but fingers in front of the grinder scare me. Keep up the good work, 👆😜
Don't need the pump, just flow the water the right way. As water heats it will naturally want to rise this should rise then feed into the top of your barrel ideally not submerged when doing so, your coldest water in the barrel is at the bottom from which the feed to the heater should come from preferably with not too much incline.
Bloody genius!!! And I love your family too mate!!! Two thumbs up and one big high five.
You could add in a one way inline check valve to force the thermal siphoning to flow in the proper direction and stop it from turning to steam. Then it will get the lower cooler water feeding into the heater through the valve. Great stuff keep up the awesome content.
I also like you’re honesty in the builds, if you don’t know something you say so. An point to a source for the information. TY
Great experiments. Been thinking of 100 ft of copper tube in my attic to pre heat water before entering the water heater. Ive never soldered copper before and hate to start above my ceiling lol, maybe compression fittings. No chance of freezing pipes where I live. Thanks for your videos
I have never commented on anyone's work before, but you are very impressive, great job. Albert
Thank you Albert Much appreciated 👍
Great craftsmanship. You don't see that much anymore, these days. I really enjoyed watching this. My favorite was the use of the grinder, as if it were a jigsaw (nicely done). That 'flange' is called an escutcheon plate. in the U.S.A., well, in the 'Plumbing Trade' anyway.
Hi Little Aussie Rockets, I just discovered this channel. Love your work. I also saw the hot water boiler you built last Dec. I built a similar thing some years ago. Ver 1 was about 1993 based on a water boiler or "Donkey" which we used as Cadets when at high school. I have been helping out at a school camp for 20 years where they use fires to cook. I take my water boiler so that all the campers, seasoned & rookies can get some hot water. I used a copper tank which originally went over the fire. Then around 2004 added a "Heating Coil". I used 4 turns of 1/2" copper tube bent to about a 250mm diameter (so about 3m of pipe in the fire). I plumbed the bottom of the coil into the bottom of the tank & the top (hot supply) line went into the tank about 1/2 way up the tank. The coil simply sat in the fire & you could cook on it too. The tank was closed except for the "Overflow" spout which is where you got the water out, plus it had a large funnel on top with an internal pipe that made the cold water spill to the bottom inside. the tank was full to overflowing. The coil heated & circulated the water & when you wanted water you poured in the amount required of cold water into the funnel & the same amount of hot came out the overflow. Still use it ti this day. I am happy to send you a photo if you are interested.
For better effieciency you should put Spiral or Spring turbolator in chimney. It will spin around axchaust gases and even out the heat.
Been waiting for this! The original video was one of the best and most unique useful rocket stove designs I've seen..You are one creative Aussie tinkerer.
Like Grampa used to say. There's more than one way to skin a cat, but no matter how you do it, the cat ain't gonna like it! You're building a rocket water heater, you have a chicken on your lathe, you eat meat pies and your wife brings you kefir. You know now that I'm gonna HAVE to subscribe! By the way, you can daisy chain 3 of those 4 foot LED "florescent" lights for probably the same cost as the high bay light. Just a little something to put in the back of your mind, wild land fire shelters utilize aluminum because it reflects 98% of radiant heat. I have aircraft aluminum sheets about my wood stove on the walls. Works a treat! Anya Ha Sayo!
Thanks mate 👍
While it might be hard to eat a meat pie in your house, in years to come you will all look back at the video as a special family moment. Dogs and kids must have hearing tuned for the sounds of pie and chip packages.
Your girls are adorable! A fun moment in the video! Great video too!
I love that you use just a few tools and you sure are an artist with a grinder. :)
Man, go with what works best for you. If someone watched your video so they cold tell you how to do it they are just confused. I work with ceramic tile and natural stone. Angle grinder is my #1 go-to cutting, boring and scoring tool. I think you're amazing with your grinder. Thanks for sharing 👍🏻
Love your vids brother. Beautiful family. God bless
Funnily enough the grinder is my goto tool for pretty much any job i do, 4 inch 1mm discs cut through anything and when i need , a diamond wheel, great on wood metal plastic anything you need cut a angle grinder.... Its good to see you use different tools for stainless and ferrous metals so many people over here in spain dont have ac lue and when i order a bit for a boat it rusts after a couple of weeks as they have contaminated it with a steel cleaning belt or polish wheel and once its rusted its almost impossible to get it off.
You are a metal artist !
Perfekt, du kannst kein Ammi sein! Vielleicht Schweizer, Koreaner, Japaner oder Deutscher. Für einen Ammi ist deine Arbeit zu perfekt !!!
you have to hug them all the time, so they grow up slower. and EVERYONE LOVES PIE.
First one of your videos that I have come across. Feel ready to hand in my man card after seeing you free hand those circles with a 5" grinder. 👍
I remember eating Aussie Pies as a kid. Popular in the 90’s in the states. A couple different flavors. Me dear ol mum told me one was made of kangaroo meat and that I would be able to jump much further… the other was koala so i could climb trees higher!
Exactly what I was looking for, best RS HW heater vid on YT. Very efficient, thank you for your effort and sharing
Really looking forward to the solar water heater 😍
Lol, love the 'rat pie's. Great work, mate! Can't wait to make my first rocket
The Thermal transfer stopped due to your water tank being to low and your dips in the pipes. Both lines need to be above the heat source for this to work correctly same as old classic cars I work on !! Other than that youer system looks great
Beautiful work of art!
I absolutely love your family, those kids are adorable, and your wife is great. The chickens probably make for tasty meals :-) In order to keep that heating unit producing heat it needs a steady source of wood, good for a bath, or cooking, but you'll need to shower fast because I've gone through a lot of wood with the rocket stoves I've built, and it didn't take long to burn thick wood.
Jo
Dave Kauffman Chickens are for eggs,kill the chickens,no more supply of "free food",think ahead,man !!!!!!
Good job well done,I like your skills with the way you use the grinder, your adorable daughters remind me of my daughters. I have to share what I eat with them too
Spot on nice to watch a professional job by an obviously a good craftsman
Great project and video. Thanks for sharing.
A chicken on the lathe, cool! Really like your shows! Keep on truckn buddy!
Thanks 👍
Usually, to avoid thermal shock, you might want to flow water downwards... Anyway, your design and accomplishment seems outstanding to me... congratulations!
At 9:30, believe me, the grinder is not the got to tool for accuracy. The accuracy is in your hand's man! I see the way you use the tool...that's a master craftsman at work!😄😄😄
You have to have the heat source below the water tank *height-wise* for the heat siphoning to work well. That was your main issue, other than not taking care of the kinks in the hose. Amazing fabrication and rocket stove heater, though. Tip of the hat to you, sir!
Nice craftsmanship - new subscriber
Thanks mate 👍
Brilliant vids.hope to get a few watched while I’m off work and out of action. Well done and keep up the great work 👍🏻👍🏻
Wonderful everything. Some times some guys are so blessed. Nice set of skills nice shop and shopper But the best thing was this peace that you whole video sends out . God bless you Christian
Thanks mate Yes we a Christian family Blessing
Dude love them little ones all you can they grow way to bloody fast and one day she is going to come home and say Daddy look what followed me home,,, Can I keep HIM? Oh and a nice build
Keep making great vids 😃👍👏👏👏👏👏
Dude, you are a rock star at cutting circles with your grinder. Also I'm a 62 year old Canadian and I've been eating meat pie since I was a wee lad. Love your vids!
Have you seen Lawrence Harrops (Loz Harrop) rocket stove he built for his shop?
I just did, and Wow!
original idea:a hot water rocket stove.......final product.....? A NUCLEAR REACTOR .....MAAAATE!!! you are a genius
Love your work mate, you seem like a top bloke too with a lovely family, livin the dream
Thermo-siphoning is prone to problems, and small problems like a little vapor do pile up quickly towards complete failure with even severe damage resulting. So, thermo-siphoning ain't the way to go as long as You have alternatives like the little pump You inserted. What would be nice was a pump with some kind of Peltier motor like the woodstove vents You can buy these days - don't know whether something like that does exist. A very nice stove though, and excellent build precision. Thanks for sharing.
Great series. .. love the chickens photo-bombing your vids, they steal the show
One word: Fantastic!
Nice freehand cutting there. Neat. 🙂
"why aren't you wearing gloves?" Some people couldn't make a peanut butter sandwich if they weren't wearing gloves. I've been working with steel for four decades and I only wear gloves when I absolutely have to.
Muy Bueno!!!! from Argentina!!!
OMG, this is what I'm looking for. Great build.
You would get more out of the heat exchanger if you ran it contra flow so cold water flows in the top and out the bottom as more heat will flow across a greater temperature difference Edit, it may be undermined by convection if the velocity of the water though the water-jacket is too low Secondly the thermosyphon would have worked if there was greater Hight difference large pipes with smooth bends were used
Great video. Informative, and fun to watch. Please keep it up. Thank you.
Some people simply wrap copper tube around the stack. It saves alot of work.
It is quite obvious that it’s the tool you use the most. Your accuracy is outstanding. 🤜🤛
Thank you for sharing you are truely blessed. I have one observation. Your K tubes will transfer heat to your face plate. This may not be relevent if the stove heats your water well enough to suit your needs. Also for saftey I would add a pop off valve pressure release. Have a wonderful day
Pop off pressure valve should not be necessary when system is open to atmosphere. Definitely needed if using a closed or mains water pressure tank .
Grinders are great for cutting holes in sheet metal. Especially if you use a small disc.
It is a very rare occurrence that I watch all of a 37 minute build video. Sometimes because of the host. Sometimes because of bad audio/video. Suddenly this one was over ! 🤓🤙
2:54 You know, in that thin material, you can run that tap with a variable speed reversible drill, but I think it might not feel right for ya, but a friend of mine ( a machinist) and I drilled AND TAPPED about a hundred 1/4-20 mounting holes ( about a half inch deep) ( blind hole )in cast iron machine casting. I didn't think it could be done, but he said, "Don't force it, let the tap self straighten, and tell you where to align the drill" This technique saved a tremendous amount of time for the both of us. ( paid project completed, in record time )
Awesome craftsmanship on the stove! Try running the hot outlet more directly to the upper barrel inlet (take out that sag in the hose). The way you had it configured created a heat trap where the cooler water settled in the sag and prevented warmer water moving through easily. This is similar to a bell stove effect if you're familiar with that. Water was lingering too long in your heat jacket and boiling. I would also avoid using those right angle connectors if possible, the thermosiphon effect is fairly weak and the shorter the distance and fewer bends the better...