[Stoves] Challenging fuel

Fri Dec 19 01:38:35 CST 2014

Kirk, thanks, now I see.I'm not sure if my fuel would keep the air channels after pulling out the rods... I will try!Good idea.
Marc
From: kgharris at sonic.net
To: stoves at lists.bioenergylists.org
Date: Thu, 18 Dec 2014 11:58:01 -0800
Subject: Re: [Stoves] Challenging fuel

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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