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thermal hot water


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#1 holdenboy1960 OFFLINE  

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Posted September 23, 2015 - 07:58 AM

I just bent the copper pipe for the hot water heater coil for the chimney on the pot belly stove I'm going to use   

 

In conjunction with a copper hot water tank (150 litre) for storage  hot water for bath's & such

 

 P2070018.JPG  

 

some Examples:

 

( Engineer775 )done a quick vid on a chip heater type for thermal hot water  but I'm just using the chimney of the stove for mine 

 

this is a simple idea for easy hot water as well , 6889c902c2ea2db64439c93301a4e9cb.jpg just good idea's for people to look at

 

Shane  :cowboy_shooter: P. S . i made the pipe bender from 2 alloy V pulley's , get a pic later  


Edited by holdenboy1960, September 23, 2015 - 08:01 AM.

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#2 boyscout862 OFFLINE  

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Posted September 23, 2015 - 08:35 AM

As long as the tank is higher than the coil, the bottom of the coil is connected into the bottom of the tank, and the top of the coil is connected to the midpoint or higher of the tank, you will create a thermosiphon. It will automatically circulate the hot water into the tank. Tap off the tank a little higher than the connection to the top of the coil. For safety, if the system is not pressurized, have a setup to let more water into the tank as it evaporates off. A float valve from a toilet can work great for this. Enjoy the hot water. Good Luck, Rick
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#3 olcowhand ONLINE  

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Posted September 23, 2015 - 08:38 AM

Whatever size stove pipe you're using (in my example, lets say 6" pipe), the coil will fit tighter to better draw the heat if you bend your tubing around a 4 1/2 to 5" pulley, or whatever one is using for a bender pattern.  It will wind right onto the pipe good & snug.


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#4 chieffan ONLINE  

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Posted September 23, 2015 - 09:25 AM

Years ago when I worked in a state park we put a 250 gal fuel tank (Cleaned up of course) on top of a shower building and painted it flat black.  Water system was full gravity.  Pre-heated the water enough it took the chill off before it got to the water heaters.  Made a big difference.  Any thing that will raise the temperature of the water will be a savings.


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#5 holdenboy1960 OFFLINE  

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Posted September 23, 2015 - 10:04 AM

i always use a 1 way stop cock valve on the cold side of the unit to stop back flow of hot water , not sure if im doing it pressured or not yet though 

 i did make a small proto type 1st to understand the system & it worked just fine but was not big enough, non pressured & i used a fill float type off an old cattle trough to auto fill the open top tank 

 

Shane


Edited by holdenboy1960, September 23, 2015 - 10:04 AM.

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#6 Arti ONLINE  

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Posted September 23, 2015 - 10:56 AM

Atmospheric is the safest. I have set some up by running a 3/4 inch iron pipe thru the firebox and looped it back out (U shaped in and out on same end of stove).  Been thinking about doing this with my corn furnace.


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#7 propane1 ONLINE  

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Posted September 23, 2015 - 06:20 PM

Great idea. I put the cold and hot water pipe on to my propane flue, all thou not as hot, it heated the on coming water to the water heater and helped keep it hot as it left the water heater. I then wraped it with insulation and put tin foil around every thing. Noel
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#8 holdenboy1960 OFFLINE  

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Posted September 23, 2015 - 08:16 PM

i don't really want to put holes in the pot belly stove fire box , although i have 3 stoves to pick from if necessary 2 are steel & 1 is cast iron ,

 

the 1 in the pic is steel so not so bad to drill or cut into & replete if necessary  

 

i can use propane if i really have too but i only use it mainly for cooking in summer , too hot in summer to light the stove inside some times

 

i do have a few wall mount gas hot water units( pilot burner types )but they need to be re jetted for gas bottle as they were main line gas units


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#9 holdenboy1960 OFFLINE  

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Posted October 09, 2015 - 07:48 PM

P2230031.JPG

 

i have now placed the stove in the hut & using it ,so to keep the copper pipe in good shape i set up a 10 litre ( 2 gallon )  earn to keep water in the pipe temporarily .

 

i will hook up a hot water tank later

 

 P2230033.JPG  

 

there is 18 winds of 7/16  copper pipe on 17 inches of chimney  (stack )

 

Shane


Edited by holdenboy1960, October 09, 2015 - 07:54 PM.

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#10 KennyP ONLINE  

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Posted October 10, 2015 - 05:47 AM

Well, you can have hot tea now!


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#11 holdenboy1960 OFFLINE  

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Posted October 10, 2015 - 08:03 AM

P2230035.JPG this might be a bit better pic of the system , and yes steaming hot water in 15 to 20 minutes 

 

the other stove i removed had to be repaired as the baffle plate under the top plate was cracked & bowed from heat & the water earn on the side had rusted the mount plate off as well from bore water 

 

PB100072.JPG this is the 1 i removed with the earn on the left (2 gal )

 

 the earn come off an old, No 7 Crown stove originally i got for mum & dad back in the 70's  


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