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Heating

Twister Top

Submitted by Jeff Davis on Sat, 2008-12-27 05:14

Last updated December 30, 2008

Twister Top pic 1: Burning air dried wood chips.

Close up of flame.: Started easy with paper.

Twister Top pic 3: Smoke free burn with air dried hemlock chips.

Twister Top pic 4: Air enters tangentially.

Charcoal Produced: A picture of the charcoal produced from the chipped hemlock.

In order for Mr Switchgrass to work smoke free everything had to be just right so the Twister Top was added. At this time it has only been tested on wood chips but has proved beneficial. A Youtube Video of the first Mr Switchgrass

A Youtube video of the Twister Top

Puffergas

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Mr Switchgrass - burning/gasifying switchgrass

Submitted by Jeff Davis on Sun, 2008-11-30 03:10

Last updated December 30, 2008

Mr Switchgrass is an inverted downdraft gasifier design that burns/gasifiers chopped switchgrass or weeds with little to no smoke problems. A rule of thumb is that each section will burn for a solid ten minutes at full flame. I measured 66 lbs for one load and it ran for about 40 to 50 minutes.

Burner Flame

Burn Flame 2: Started with paper or house trash.

Burn Flame 3: Smoke free flame.

Burn Flame 4

Burn Flame 5: Very clean burn.

Bale Storage: This is how I stored the bales of switchgrass.

Flue: No smoke from the stack.

Transformation Tower: More proof of the clean burn.

Air tube and grate: Grate and air tube.

Loaded: Here you can see a new load of switchgrass, air tube and air holes.

Puffergas.com

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Twister

Submitted by Jeff Davis on Sun, 2009-01-04 05:32

Last updated January 03, 2009

Twister Pic 1: Tall flame, concentric vortex burner.

Twister Pic 2: Concentric vortex burner.

Twister Pic 3: Short flame.

Twister Pic 4: Concentric vortex burner fueled with Cedar.

The Twister is a crude prototype of a concentric vortex burner that was made from what was remaining of Mr. Charcoal. Basically you are looking at a hot water heater turned upside down.

It was fueled with ceder shavings (bedding) purchased from Tractor Supply Company. Although I was surprised that it did burn during the first test run I was somewhat disappointed with the cedar feedstock. Without a pilot fire, in the bottom of the burner, it became difficult to keep it burning with just the cedar. But I am looking forward to testing a more volatile fuel like chopped switchgrass with it.

A Youtube video of the Twister

Puffergas