Sue Rine wrote:Nice work!
Christos Alexiou wrote:I had not time to explain myself better before, but I do believe that the best way to heat up water with wood is using a rocket pocket! You make the rocket pocket with a metal barrel, you immerse the whole system in the water, add wood to the stove and there you go. There is no heat loss to the surroundings, to the earth nor to the air. All heat created by the stove is directly transmitted to the water (Except for the chimeney!). You actually contain your whole fire inside the water! What can beat this??? A rocket pocket works on the principles of the rocket stove which makes it very efficient, but has no unnecessary mass to heat up for this case. I have tried it and it works fantastic. If you make your bath big enough you can have your stove in it, or if not, you can immerse the rocket pocket inside a bigger barrel filled with water and then circulate the water from the big barrel to the tub. The only complication is to make your rocket pocket water tight, but you can use a barrel with a water tight lid and weld your two tubes to it. Not so difficult.
The same principle can be applied to warm up shower water using wood. I also agree that preheating the water with a solar system is a great and cheap solution.
Christos Alexiou wrote:I use a rocket pocket entirely immersed into the water. It works great. It is like having a fire inside the water. Zero heat lost through the walls of the barrel, but all the heat transfered into the water.
Sue Rine wrote:Is a rmh for an outdoor bath perhaps overkill? We simply dug a hole in the ground on a small bank. The bsath fitted snugly in the hole. From the lower side of the bank we then dug under the middle of the bath, a pit to build a fire in and an escape route for the smoke at the back of the bath. I suppose you could say that that formed a more or less j shaped firebox with the bath as the top surface of the firebox. It heats the water to bath temperature pretty quickly. It's best to let the fire die down to embers before getting in the bath and essential to sit on a towel! It's lovely to have a bath that doesn't cool down while you're soaking. The embers are enough to keep the water at a good temperature.
Christos Alexiou wrote:In the summer time the water of my bath tub gets green and worms grow in it after a few days. Since the amount of water is large and I don't want to change it all the time, does anyone have an idea of what could I use instead of Chlorine to keep the water clear ? I heard something about hydrogen peroxide but I am not sure? Thank you.
Glenn Herbert wrote:Nice! I would definitely treat the whole bottom of the tub as an enclosed bell - less work to do as well as more efficient than running ducts under it.
Russell Dinning wrote:
Also Satamax what makes you say the riser is too short Its just under 650mm from the bottom OK thats 70mm lower than peters spreadsheet.
Well, i mean a volume, big enough, where the gases can turn freely without friction.
Russell Dinning wrote:Max by plenum what do you mean could you do me a quick sketch or link. My system size is not quite 4 1/2 inch. Supposed to be 4 but didn't have 100mm of pipe for riser mold so used what I had 112 mm ish.
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