Thank you for your response. I have a few clarifications and questions.
"Hi Dennis; Welcome to Permies!
Well it sounds like your trying to take a rocket stove and try to make it into a rocket mass heater?"
They are two different stoves.
A rocket stove is for cooking or quick temporary heat (ice fishing house)
Yes, after posting this I realized I was in the wrong forum.
"A rocket mass heater uses the exhaust to heat a mass and share that heat all night."
Yes, the mass in this case being the dirt.
"With your idea you would be relying on radiant heat to try and heat your dirt."
That's right, I'm using the dirt as thermal mass just like you would do with cob.
"Most of your heat is going straight up the chimney."
How is this true if the entire combustion chamber is surrounded by dirt?
The dual chamber is supposed to superheat whatever sorrounds it, be it air or something more solud5 (like cobb or dirt(..
"I'm afraid it is not going to work very well.
While your stove is burning your house should be comfy... as soon as your fire goes out your stored heat will quickly go away."
Is there some reason the heat won't be stored in the dirt (like it would be with cob?)
"The other reason it may not be such a good idea.You can not heat the earth... its just to big... even with a molten core!"
This is structurally no different than any other rocket stove mass heater. It's merely using dirt instead of rocks or cobb.
"A RMH mass needs to be inside your building and insulated from the ground and outside walls to perform as expected."
This will be inside my building, in a subfloor. Also, it will be at the center of the space insulated from the ground and the outside walls.
"As far as copper pipes and water... very very dangerous! Water flashes to steam instantly... it expands... it has no where to go... so it explosively bursts thru the copper, spraying shards of metal and super heated steam into your home... makes for a REALLY bad day."
Obviously the pipe will not be inside or touching the fire chamber, and it will be kept enough of a distance that the maximum temperature will not exceed 100° C. If copper is the issue, I will get steel or cast iron pipe.
