Cindy Mathieu wrote:Pellets, by their nature, have a lot more ash than cord wood. Moreover, they have some amount of embedded energy because a machine somewhere else had to make them. They are very uniform, so what happens to all the material (such as bark) which doesn't match the color the pellets are supposed to be?
Cindy Mathieu wrote:
Also, the point of the mass in a rocket mass heater is the same as the masonry materials in a masonry heater. You burn fires to heat up the mass of cob or the mass of fire clay bricks and then you don't have to tend the fire all the time because the mass is still giving off the heat.
Peter Ellis wrote:
I would not want to use long continuous fuel rods, in part because I have visions of them burning upward and falling out of the tube, rather than nicely dropping into the feed tube. I have frequently experienced fuel that has "hung up" in the feed tube and needs to be pushed in. Gravity does not always address the issue.