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!

@moczikgabor

Жыл бұрын

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

@thelazycat_

Жыл бұрын

@@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

@moczikgabor

Жыл бұрын

@@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.

@moczikgabor

Жыл бұрын

I might misunderstood your reply, you probably know all this, but anyway, I leave the above post as is, might be helpful for someone.

@iuravermeer196

6 ай бұрын

i get 7kw with efefficiency 80%. it's close to reality?

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).

@gueacil7131

2 жыл бұрын

Sometimes i got bored on project video without naration or without detail explanation of what, why or how.

@hyselwatchandclockrepair1874

Жыл бұрын

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.

I'm Japanese, I love the outdoors, this video is exciting, thank you

@LittleAussieRockets

Жыл бұрын

Thank you for watching. I like your KZread channel

@campnihamattainakamono

Жыл бұрын

I'm happy! !! I look forward to working with you🤗

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.

Jeez that’s smart putting a padlockThinking back to my childhood

you have to hug them all the time, so they grow up slower. and EVERYONE LOVES PIE.

Perfekt, du kannst kein Ammi sein! Vielleicht Schweizer, Koreaner, Japaner oder Deutscher. Für einen Ammi ist deine Arbeit zu perfekt !!!

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. 👌🏼

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.

@LittleAussieRockets

4 жыл бұрын

Life is so precious, thanks for sharing

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.

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!

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).

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 👍🏻

❤❤❤❤❤ that was awesome build and and you explaining how and why was marvelous rorschach

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 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!

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

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!

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

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.

Thank you for sharing your learning curve and experiments very clever Living off grid for 15 years now I have built two in line on demand wood fire hot water heaters - I have spent so many hours thinking how best to easily and most inexpensively improve my last experiment - my first 50 foot 3/8 copper tube inside an old wood stove oven retrofitted to run the flame over the fire box then through the 5 inch shelf with copper coil to standard 6 inch chimney works great but 1) slow tub fill 2) tub does burn out after a few years of use here and there not daily but a lot - my second all steel double long 5 gallon propane tank inside a craftsman air compressor tank making a full water jacket works great faster but the water is not chrystal clear as with copper tub (or a stainless) it is better now just fine me on season three as it fully rusts in but the hole point of off grid spring water outdoor tub is “Chrystal Clear Water” especially if I have female company - I also took a conventional 5 foot cast iron tub with square lip on top and built a fiberglassed double 2x4 extender top that I silicone sealed to the tub making it much deeper with head rest and foot extender shelf - at 6 foot 5 I can fully float and soak for hours in the rain or snow or clear nights - when cold it takes a lot more wood to keep it hot - for me the key is an open in line flow system where the control valve is on the inlet for heat control of flow and safety as the system is always open and can not build pressure

Reminds me of the old folders we had back at school. Perfect for sheet metal origami. Love your work dude.

@spankitout

Жыл бұрын

They are called a brake, but dont ask me why.

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.

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.

As a plumber when I was working at mechanical shops I always envied that tin benders , fabricators and pipe fotter welders got to work with so many different machines and tools that we didn't get to work with. A carpenter or auto mechanic never interested me much but to be able to take a roll of metal and make the ducts or other projects they would take in when the normal work slowed down was impressive. As a full weld metal shop they could basically do almost any type of metal work. They had ever type of welder , roller, break, guillotine, gantry fabricator tables. The mathematics of building a eccentric or concentric off set out of any material or thickness of metal is an admirable skill set. All rhe new technology is cool and interesting but the job description that is being replaced gives one a melancholy feeling. To know that so many of our kids and grandkids won't have the experience of a har days work because that type of work has been offshored or a machine can do it much more efficiently and cost effective.

@LittleAussieRockets

3 жыл бұрын

So many of skills are being lost due to "progress" I spend as much time as I can with older trade's men. Learning a lot of good tricks and the odd bad one😁

Amazing. Love the way you talk and work and thanks for sharing 💗

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 KZread 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."

@LittleAussieRockets

4 жыл бұрын

Thanks mate!

Exactly what I was looking for, best RS HW heater vid on YT. Very efficient, thank you for your effort and sharing

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!

@LittleAussieRockets

3 жыл бұрын

Thanks mate 👍

Brilliant craftmanship.

You are a metal artist !

A chicken on the lathe, cool! Really like your shows! Keep on truckn buddy!

@LittleAussieRockets

Жыл бұрын

Thanks 👍

Love this vid but fingers in front of the grinder scare me. Keep up the good work, 👆😜

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.

@RangieNZ

4 жыл бұрын

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.

Not bad. If You want higher effeciency make the chimney higher. It will pull more air inside and burn much hotter

For better effieciency you should put Spiral or Spring turbolator in chimney. It will spin around axchaust gases and even out the heat.

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!

"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.

Spot on nice to watch a professional job by an obviously a good craftsman

Nice freehand cutting there. Neat. 🙂

Sorry mate, had to pull you up on the meat pie. Came from the UK to here, and from the Roman soldiers when they invaded the UK. The soldiers used to take with them on long hikes. Nice builds by the way.

Ball one-way valve on the water inlet to the heater. Coffee percolator style.

I have never commented on anyone's work before, but you are very impressive, great job. Albert

@LittleAussieRockets

4 жыл бұрын

Thank you Albert Much appreciated 👍

A one way valve leading from the barrel to the stove will force the heated water to push into the barrel and draw in cold to the stove.

Bloody genius!!! And I love your family too mate!!! Two thumbs up and one big high five.

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!😄😄😄

Your workmanship is a thing of beauty! Wow!

The tank needs to be elevated above the heat source so that convection with automatically circulate the hot water into the tank. Also, plumb/feed the hot side to the bottom of the tank and the cold supply from the middle/higher than the hot inlet. Convection with do the work mixing without needing a pump.

original idea:a hot water rocket stove.......final product.....? A NUCLEAR REACTOR .....MAAAATE!!! you are a genius

I know I'm late to the party. Great video though! Love the little family time vignettes. 😀 Also, good job on the work. I'm a proponent of making my own improvised tools and enjoy watching folks who aren't afraid of building their own stuff if needed. Please keep up the good work!

Grinders are great for cutting holes in sheet metal. Especially if you use a small disc.

I like what you’re doing & yes you need a damper in the intake.

It's amazing what you can do with a grinder!!

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.

You talk just the truth awesome, you have the ultimate blokes shed fit out

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

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!

@billpemberton3982

4 жыл бұрын

Have you seen Lawrence Harrops (Loz Harrop) rocket stove he built for his shop?

@LittleAussieRockets

4 жыл бұрын

I just did, and Wow!

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.

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!

It is quite obvious that it’s the tool you use the most. Your accuracy is outstanding. 🤜🤛

This should be sold in a shop. Great work.

I love that you use just a few tools and you sure are an artist with a grinder. :)

The bottom intake on you water supply has to be higher than the top hot water return on your Rocket stove. So all you have to do is raise your water drum higher. Good job you on the right track, all the to you and your nice little family.

Funny with the kids and the pie

Great Build! I've never seen anybody basically free hand cut a hole with a grinder. That is one of the reasons I subscribed to you channel.

@LittleAussieRockets

3 жыл бұрын

Thank you Sir 👍

@4486xxdawson

3 жыл бұрын

I cut toilet flange holes with a rip saw the same way lol , i guess im not the only one cutting round holes with a strait cut saw lol ...

I also absolutely Love your family! Your fabrication work is also on point!

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!

I Love meat pies!!! So many different types, pastry and meat were MEANT for each other!

Just a wonderful video.

Great to have the C/H water ports coming from One Side of the unit. Fantastic.

❤️❤️❤️❤️ 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.

Nice craftsmanship - new subscriber

@LittleAussieRockets

4 жыл бұрын

Thanks mate 👍

18:22 I have used similar exhaust wrap when I put extractors on my old ute and I had lost all the heat shields that are on the manifolds. Wet it up and get itchy. Great product but don't cross it often.

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

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 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!

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 love the stuff you are doing the hot water thermal cycling try putting the tanks 3 foot above the rocket heater and insulate the pipes maybe wider pipes the pressure of the water will stop the water from boiling and carry more heat through the pipes I'd love to see it working well . My uncle had a back boiler in his coal fire the water tank was 4 meters above the fire and boy the water was very hot

A few suggestions you might wish to consider that might help you get the system to naturally circulate and the water inside your barrel to mix naturally. 1. For a thermal siphon to work stably, the cold reservoir (your barrel of water) must be at an elevation above the hot reservoir (the heater inside your stove). Try raising the bottom of the barrel a few feet above the elevation of the hot-water outlet connection on your stove. 2. To naturally mix the water inside the barrel during heating, try connecting the hot-water outlet hose from the stove to the center of the bottom of the (raised) water barrel, with the flow into the barrel directed upwards. Make sure that the hose continuously slopes upward from the stove to the barrel (no dips). The closer the hose is to vertical, the better the circulation. 3. Try placing a sheet-metal cylinder inside the barrel with a radial clearance of 4 to 6 inches to the side of the barrel. The cylinder should extend from the bottom of the barrel upwards to about 1 foot below the water level. The cylinder forces the hot water returning from the stove to travel a long distance through the barrel before it can reach the connection supplying cool water to the stove, giving it time to better mix with the water in the barrel along the way. 4. Continue to have the connection supplying water to the stove connected to the side of the barrel, but try moving its elevation down from its current mid-barrel elevation to an elevation about 4 to 6 inches above the bottom. This should provide the coolest water to the stove and increase the driving head for the thermal siphon. Assure that the supply hose slopes continuously downward from the barrel to the stove's cool-water inlet connection (no dips). The closer the hose is to vertical, the better the circulation should be.

@masterdebater8757

4 жыл бұрын

Correct elevating the reservoir will work, but also adding a brass swing check in the cold water inlet side of the boiler will also stunt the thermal expansion and allow the thermosyphon to happen undisturbed.

the hot water outlet has to be more in the middle of the water tank, as in addition to giving more hot water pressure it always rises, and you have to place a hot water fisherman on the outlet

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.

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

OMG, this is what I'm looking for. Great build.

the pipes need to have grade on them for the thermosiphon to work. you have hose draping and stopping the siphon, hot water rises in a thernosiphon but it will not work properly if you have any downward turns or traps. A trap is used to stop thermosiphoning.

Love your vids brother. Beautiful family. God bless

Your girls are adorable! A fun moment in the video! Great video too!

beautiful work ! good job .

Thermo siphon arrangement needs natural rise and fall so your tank should be elevated above the inlet and the return to tank above the outlet, both pipes as straight / direct as possible with no traps and that should work although your washing machine hoses may have also caused you issues.

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

@LittleAussieRockets

4 жыл бұрын

Thanks mate Yes we a Christian family Blessing

Love your work mate, you seem like a top bloke too with a lovely family, livin the dream

This one is interesting

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..

@radargenta

2 жыл бұрын

Hi Rolls FPV, two years later...tell us about your project, did it work?

Usually, to avoid thermal shock, you might want to flow water downwards... Anyway, your design and accomplishment seems outstanding to me... congratulations!

Great work ! Great finished product!!

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.

Let's go to 100 K SUBSCRIBERS!!! THIS IS EFFIN GREAT CONTENT

@LittleAussieRockets

2 жыл бұрын

Thanks bro!

Lol, love the 'rat pie's. Great work, mate! Can't wait to make my first rocket

Love your videos mate, really like the plan as you go attitude you have towards the rocket stoves.

have a nice kefir