This is my gravity fed pellet burner.
The air intake and the feeding rate can be adjusted depending on the intensity of heat needed.
Set to the minimum feeding rate, i get over 8 hrs of heat with a 40 pound bag of wood pellets.
Together the rocket stove and the burner work better then i expected,
Wood pellet are cheap and easy to find.
Since wood pellets are made from recycled wood, i guess this is somme kind of green way to heat my garage..
Step 1: The perforated plate is the key to success
- Pellets will fall on the perforated plate, slide down and form a pile. Fire wil waken the pile and make it crash. This will allow other pellets to fall into the burner. This process will continue as long as there are pellets in the container.
- The angle of the perforated plate is about 45 degres. The holes act in two ways, they allow air to feed the fire and hold the pellets as they fall. After a few minutes of burning the plate is red hot and every pellet that comes in contact with it quickly ignite.
- The space between the plate and the interior side of the square tube il about 1/4 inche so air can get in at all time.
You can see it work there:
This burner could be install on different kind of heat exchanger device, it could just be an extension of the square tube ending to a chimney.