Marty Spehar wrote:Changed my plans,,,
1) coiled up tubing - copper too expensive - steel to hard to bend
So, I thought the best way to heat water is to weld a piece of steel to the top of the barrel (propane tank in my case) and two nipples on either side.
The heat stream from the heat riser will heat the water in the area between the newly welded piece and the top of the tank.
This will be an open system, i.e. the effluent will be without restrictions.
Peter Ellis wrote:Marty, that approach of putting a sealed top on with two small openings concerns me. With barrel top temperatures in the 500 and up vicinity, a small volume of water is going to run a real risk of flashing to steam and creating pressure in the cap. Depending on the material you use coming off those nipples on the cap, you may be at risk of temperatures exceeding what the material can handle, as well as pressure limits.