William Bronson wrote: If I could find a square tank it would be better be better for heat transfer.
William Bronson wrote:Maybe an occasional cleaning would suffice.
William Bronson wrote:I had envisioned a 1.5" pipe passing through the return airduct on a downward slant toward a 55 gallon drum .
That drum would be set smack-dab against the vertical portion the return air duct and wrapped in insulation except for the side up against the duct. If I could find a square tank it would be better be better for heat transfer.
A pump would tansfer the (relatively) cooled water back to rocket stove via the same return air duct run,in order to remove the last bit of heat from it.
The problem I see with running through the return air duct is possible condensation.
William Bronson wrote:This design could be built as a hot water system,but it's the potential for not needing a pump and the magic of phase change that intrigue me.
I intend to set the rocket boiler inside a semi detached sunspace and siphon off the solar/wood heated air for immediate heat, with the heated water being the thermal mass.