[Stoves] Challenging fuel

Thu Dec 18 13:58:01 CST 2014

Marc,

Attached is a drawing.

Kirk
  ----- Original Message ----- 
  From: Marquitusus 
  To: Discussion of biomass cooking stoves 
  Sent: Thursday, December 18, 2014 10:15 AM
  Subject: Re: [Stoves] Challenging fuel

  Sorry Kirk, I'm not able to understand what you mean. I cannot properly translate your indications. Maybe you can explain in another way or attach a picture or drawing?
  I do understand you mean keeping a long stick while loading fuel, and then putting it out, but I cannot understand specific way of doing this.

  Thanks
  Marc

------------------------------------------------------------------------------
  From: kgharris at sonic.net
  To: stoves at lists.bioenergylists.org
  Date: Thu, 18 Dec 2014 08:57:51 -0800
  Subject: Re: [Stoves] Challenging fuel

  Marc,

  Another idea.  When I have had problems with primary air resistance, air channels up through the fuel have worked.  These are formed by long slinder sticks or rods.  They are attached to a board at one end to form a comb like structure.  Place the tips of the comb on the grate and pour in the fuel.  The stove may need to be shaken to settle the fuel.  Pull out the comb and the primary air channels are formed.  This has worked for me for tall fuel loads.

  Kirk
    ----- Original Message ----- 
    From: Marquitusus 
    To: Discussion of biomass cooking stoves 
    Sent: Thursday, December 18, 2014 2:41 AM
    Subject: Re: [Stoves] Challenging fuel

    Thanks Kirk and all, 

    It sounds good idea for too small pieces to be pyrolized. Definitely I'll make some tests on it.

    Thanks to your comments and others, I'm realizing the need for screening this fuel. Though I was trying the "minimum process" way, it seems to me now that is absolutely necessary to screen this fuel, in order to reduce the size variability and achive replicable results in TLUD's.

    Lack of primary air has been a constant with this fuel, which has led me to design big primary air holes and high chimneys, just to get the correct air supplie for gasification. It sure will be improved with the fuel screening.

    I'll keep testing and posting (and reading)

    Thanks
    Marc

----------------------------------------------------------------------------
    From: kgharris at sonic.net
    To: stoves at lists.bioenergylists.org
    Date: Thu, 18 Dec 2014 00:41:23 -0800
    Subject: Re: [Stoves] Challenging fuel

    Marc and All,

    Was there not a post a month or two ago about putting rice hulls or saw dust into a can with a hole in the top.  This then was put in the reactor with fuel around it.  The heat of the stove pyrolyzed the contents of the can and produced wood gas which exited the hole and was burned in the secondary.  I forget who posted it and could not find the post, but it was a wonderful idea.  I tried this with saw dust and with pellets and both worked.  The can needs to be raised off the grate some so pyrolysis will finish before the migratory pyrolysis front goes out or it smokes on and on.  A single screening of the almond hulls will seperate the small pieces and dust out for use in the can, while the larger pieces will be the outer fuel.  This way the small pieces are used without clogging the primary air passage.  Perhaps pieces that are too large could be used in the can as well without having to chop them up.  The can cannot be to big or the power level is reduced.  The can which worked for me was .4 the diameter which is 1/6 the area of the reactor.

    Kirk
      ----- Original Message ----- 
      From: "Marquitusus "@k.mx.sonic.net 
      To: 'Discussion of biomass cooking stoves' 
      Sent: Tuesday, December 16, 2014 3:21 PM
      Subject: [Stoves] Challenging fuel

      Dear stovers,

      I send you a picture of the fuel I'm trying to deal with.
      This is the raw fuel as it is normally sold here. They are almond husks.
      As you see, it's sizes varies from 1 to 40mm!

      Maybe people can tell me how this can affect the TLUD design

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