I have had an RK Drum for about two years, and designs keep taking shape and
being refined in my belfry for the furnace muffle. I'll build it to roast
with preheated fresh air and combustion gases. It will dump minimum heat
overboard to the atmosphere and have a regenerating AB chamber.
With a closed heat circuit, even the AB won't vent heat directly to the
atmosphere but it'll be recycled to help roast the coffee. So far, the
mockup pieces flew when I turned on the integral cooling blower.
It doesn't take that much heat to roast coffee beans- it's just the massive
airflow that gets heated to the same temperature. Most of this heated air is
allowed to just leave without doing anything. Not in my trailer.
Cheers, Mabuhay -RayO, aka Opa!
Check your BTU's at the door-
On Oct 19, 2007 8:33 PM, James Raven wrote: