[Terrapreta] Successful charcoal burn

[Sean K. Barry]

Hi Richard & Larry,

Was that exhaust draft stack shown in the eddb136e0a_o.jpg picture venting from the bottom of the wood stack?

Where were the air inlets?
Was the cross-sectional area of the air inlet smaller or larger than the draft vent (looks like 8" vent pipe)?

How long was the burn before covering?

How long was it "pyrolizing" (small amount of air input)?

Did you see the color of the smoke change from white to blue/clear before you stopped?

Was the vent stack melted at the bottom at all?

Were you able to make any temperature measurements?

SKB


  ----- Original Message ----- 
  From: Richard Haard<mailto:richrd at nas.com> 
  To: terrapreta at bioenergylists.org<mailto:terrapreta at bioenergylists.org> 
  Sent: Friday, April 13, 2007 11:48 PM
  Subject: [Terrapreta] Successful charcoal burn



  Making charcoal at 4CN for our experimental study.

  Engineer and Landscaper, Terese and Larry, did a great job last  
  weekend building this woodstack for a charcoal burn.

    restacking wood from last weeks partial burn for a top lit down  
  draft charcoal burn

  http://farm1.static.flickr.com/169/458350065_21b4d4379c_o.jpg<http://farm1.static.flickr.com/169/458350065_21b4d4379c_o.jpg>

  Finished pile with air supply pipes

  http://farm1.static.flickr.com/235/458350069_b31b1a9b05_o.jpg<http://farm1.static.flickr.com/235/458350069_b31b1a9b05_o.jpg>

  earth covered pile a few hours after lighting

  http://farm1.static.flickr.com/206/458350077_eddb136e0a_o.jpg<http://farm1.static.flickr.com/206/458350077_eddb136e0a_o.jpg>

  Larry estimates a 40 % yield in charcoal by volume.

  http://farm1.static.flickr.com/175/458342450_8f7ccb5c98_o.jpg<http://farm1.static.flickr.com/175/458342450_8f7ccb5c98_o.jpg>





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