Low Tech DIY Rocket Stove Water Heater // Part IV // Stove Upgrade
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- čas přidán 19. 01. 2021
- I am increasing the size of the rocket stove to heat the water faster and more effectively. Upcycling bits of old pavers, I show you don't need any special heat bricks or metal work to make a cheap and easy rocket stove water heater. The total cost of the materials for this build was £85 or $100.
The materials I brought for this project are:
2x Quick-fit 15mm to 10mm reducers
2x Quick-fit 15mm connnectors
10m x 10mm copper coil
25m x 15mm PVC Barrier pipe (I only used ~5m)
Everything else was salvaged from a rubbish pile or skip.
If you are going to make a water heater like this the key points are:
1) Make sure the water tank is as high as possible
2) Cold water goes into the bottom of the copper coil
3) Keep the pipes to the water tank as short as practical
Thanks for dropping by, I hope you like the video. Let me know what you think below. I have videos on biogas czcams.com/video/Z9MTCFWTpyo/video.html or my strawbale shed build (czcams.com/video/zOJGT3WC_zk/video.html) Cheers.
Love the idea of using sand as your mortar.
Also, a car heater core might be more efficient for heat transfer.
just a small tweak i'd do is to make sure the hot line always goes up. you have it coming out, drooping down before it heads back upwards to the tank. this will eventually let an air bubble get trapped at the top of the heat coil where the pipe heads down. while trapping air is easier than trapping critters, air bubble pelts dont sell so well.. the very low pres of this pump it wont be able to push air down all that pipe to get it out of the system. not an issue if you dont mind resetting it once in awhile, but simpler to avoid it. same applies to the cold water feed from tank to coil inlet, always pointing down.
Hi William. Thanks for taking the time to make suggestions. When I come to make the final permanent solution I will be sure to do as you suggest. Cheers! Tom
Great improvement in the design. I've been playing with the idea of what you've done with a larger tank, prob a hot water tank, then using a small central heating pump to then pump the water through my radiator inside. I was thinking of having a open vented tank so as not to build up too much pressure if the water got hot.
I think a larger reservoir tank which is used to heat a secondary tank which is pumped to radiators is a good idea. I guess there is a balanace, if the tank it open vented then it will be less efficient as the increase in pressure helps the system. A safety valve that vents if pressures get too high would definitely be sensible though.
Excellent!
Thanks
That is a super job Tom, after you have built your straw shed you could build a more permanent one and your gas production will be fantastic. Congratulations
Thanks Craig. Its worked a lot better in this format, thanks for the suggestions. Really excited to pull it all together. Hopefully by summer I'll have it all setup properly!
I read your suggestion in the video, you seems a wonderful person, so respectful, God bless you
Yep, as mentioned, hot needs to only point upward. That downward turn at the top of copper and the plastic is killing your flow...
For sure. I am hoping to have access to some clay soon to build another version. I will most definitely be including the points you have mentioned. Cheers
I love your videos. Rocket stoves are great heat generators, but efficiently harnessing more of it could get more calories into more water for a longer time. Questions.... 1: Could you use an old insulated water heater tank instead of an uninsulated plastic bucket ? 2: When the system is in full flame, how much heat is still rocketing out of the stove and "heating the outdoors" ? Could that be made useful in your final setup ? 3: Your chimney is a radiator - could a triple-wall stovepipe keep more heat on the coil ? That begs question 2: above. Thanks!
Hi Steve. All good questions, there are a of of ways my setup could be improved for sure. Insulating the water tank, a better chimney, a taller chimney. I hope these videos just show that these things are harder than they look on CZcams haha. I have moved away from the idea of using on of these to heat my digester for now though, moving to some kind of solar/compost hybrid system that can be used more easily semi-autonomously
The forced air furnace
If put together correctly could very easily and cheaply heat your home
For sure it could. Mine needs a few upgrades before it gets capable / safe to do that though. haha.
What kind of sand is that?
Standard sharpe sand. The cheapest they do at the hardware store.