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OfflineXUL
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Hot water siphoning for off grid water heating * 2
    #25922419 - 04/08/19 06:01 AM (4 years, 9 months ago)

The diagram is the basic idea.

I can imagine a wood stove in a cabin basement that runs a small span of baseboard and into a holding tank for showers -- or a hot tub.

The idea is simple enough. Heat the water tank with a copper coil around a wood furnace. Hot water rises and cold water lowers. Gravity and heat then create an ever flowing loop of warming water.

This is rather brilliant, imo.








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TRUMP 2020


Edited by XUL (09/22/19 05:47 PM)


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Invisiblekoraks
Registered: 06/02/03
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Re: Hot water siphoning for off grid water heating [Re: XUL]
    #25924114 - 04/08/19 11:53 PM (4 years, 9 months ago)

Provided you have a decent number of sun hours, a solar heater is more elegant, more efficient and cleaner.

A neighbor of mine uses a contraption roughly similar to your design for steam-forming wood; it's essentially a small wood-burning stove with a heat exchanger (essentially part of the iron stovepipe with some tubing welded onto it) - water passes along the stovepipe, heats into steam which is led into a steam tank where he puts in the wood to be formed. Efficiency is obviously ridiculously low as the vast majority of energy gets dissipated into the air.


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OfflineLogicaL ChaosM
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Re: Hot water siphoning for off grid water heating [Re: XUL]
    #25924299 - 04/09/19 05:34 AM (4 years, 9 months ago)

Thats amazing. Its so genius. I think i need to make one for my pool.


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OfflineXUL
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Re: Hot water siphoning for off grid water heating [Re: LogicaL Chaos] * 1
    #25924334 - 04/09/19 06:07 AM (4 years, 9 months ago)

I thought the same thing when I discovered it.

Amazing.


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OfflineLogicaL ChaosM
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Re: Hot water siphoning for off grid water heating [Re: XUL]
    #25924340 - 04/09/19 06:12 AM (4 years, 9 months ago)

It reminds me of how moonshine is made. Except the goal here is to heat the liquid not cool it down.


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OfflineTripsten
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Re: Hot water siphoning for off grid water heating [Re: LogicaL Chaos]
    #25975544 - 05/06/19 10:58 AM (4 years, 8 months ago)

Y’all live off grid ?
How is that ?
How does one get started
Is it possibly to make money
And if so could you be “off grid” in a sense but still go to a grocery store ?


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Invisiblekoraks
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Re: Hot water siphoning for off grid water heating [Re: XUL]
    #26051486 - 06/14/19 02:14 AM (4 years, 7 months ago)

@newzzy that has no bearing on the topic at hand. Reported for consistently spamming with your posts. Nice try though.


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InvisibleGuy1980
Registered: 09/11/12
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Re: Hot water siphoning for off grid water heating [Re: XUL]
    #26055562 - 06/16/19 10:14 AM (4 years, 7 months ago)

Where's the exhaust?


Edited by Guy1980 (06/16/19 10:19 AM)


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OfflineXUL
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Re: Hot water siphoning for off grid water heating [Re: Guy1980]
    #26055612 - 06/16/19 10:45 AM (4 years, 7 months ago)

The chimney or just the air above a fire.


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InvisibleGuy1980
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Re: Hot water siphoning for off grid water heating [Re: XUL]
    #26056764 - 06/17/19 12:09 AM (4 years, 7 months ago)

Quote:

XUL said:
The chimney or just the air above a fire.




I might be being dumb, but I can't see a chimney and isn't the fan blowing the air into a deadheaded space?

I suppose it's only a question of ducting it out once past the exchanger anyway, so not a big issue - Just couldn't see the airflow path from the diagram (and wouldn't want someone filling their basement with CO :laugh: )


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OfflineXUL
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Re: Hot water siphoning for off grid water heating [Re: Guy1980]
    #26057101 - 06/17/19 07:01 AM (4 years, 7 months ago)

Click the video for clarification.

It's more simple than you may think.

It's just copper tube twice connected to a barrel of water. The copper coil is heated with fire and heats the water barrel. In the water barrel cold water sinks and hot water rises. The coils are connected to the barrel and hot/cold water recycles until the water is warm -- or as hot as your fire is.


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TRUMP 2020


Edited by XUL (06/17/19 07:01 AM)


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InvisibleGuy1980
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Re: Hot water siphoning for off grid water heating [Re: XUL]
    #26057489 - 06/17/19 12:10 PM (4 years, 7 months ago)

I went by the diagram and the description of it being in a basement.

Looks like a fun little project if you've got the bits lying about, but there's so much work to do if you wanted to make it anything more than a novelty.

If you've already got a vented burner, you could utilise the existing exhaust as a heat source.


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Offlinebroshammy
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Re: Hot water siphoning for off grid water heating [Re: XUL]
    #26127106 - 08/08/19 03:10 PM (4 years, 5 months ago)

Great idea, except that in general you want to keep water around 100 to 105 degrees fahrenheit to avoid heat stroke. 105 is pushing it, but that's where I usually keep my tub at. I enjoy it, but you could build a fire pit to isolate the heat instead of widening the diameter of the copper as well. That would save on costs, I think. Also, you could get a thermometer with an alarm so that you know when to close off the airflow of your pit. So that you can maintain it easier.

thermometer: https://www.thermoworks.com/Smoke
fire pit stones: https://www.homedepot.com/p/4-in-x-11-75-in-x-6-75-in-Pewter-Concrete-Retaining-Wall-Block-81100/100333178


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"Even a happy life cannot be without a measure of darkness, and the word ‘happy’ would lose its meaning if it were not balanced by sadness." - Carl Jung


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OfflineXUL
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Re: Hot water siphoning for off grid water heating [Re: broshammy]
    #26202528 - 09/22/19 09:59 AM (4 years, 4 months ago)

What do you think of using the copper pipes as baseboard heating that circulates through a hot water tank?

Wood stove and tank. The baseboard heats through the copper transfer.




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TRUMP 2020


Edited by XUL (09/22/19 05:47 PM)


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Offlineroppongikitkat
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Re: Hot water siphoning for off grid water heating [Re: XUL]
    #26377522 - 12/12/19 03:34 PM (4 years, 1 month ago)

this can work and it can work really well. you should consider having a few loops to concentrate the heat and transfer it well.

keep in mind that you can move this water passively but you have to go with the flow of the convective currents. heat will rise, cool will drop. so set up your pipes in like fashion. i think i remember a few youtube videos of a guy making a water heater by throwing a coil of copper pipe on top of the fire and simply having a large reservoir of water away from the fire as a heat sink. pretty similar to what you have drawn here

there will be an increase in pressure as the convective currents move the water through the tubes. so keep that in mind as the water inside could boil


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OfflineDazzle
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Re: Hot water siphoning for off grid water heating [Re: koraks]
    #26392119 - 12/20/19 08:42 AM (4 years, 1 month ago)

I regularly install setups just like this sometimes with 3 to 4 heat sources. Hit me up if you need hard questions answered.


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