[Stoves] Heavy metal-pipe gasifier Re: Idea for cooking on a TLUD

[Inversiones Falcon]

Dear Paul, if you send me some diagram we could tried to make it for you or for Crispin
Best regard
Gustavo

      From: Paul Anderson <psanders at ilstu.edu>
 To: Discussion of biomass cooking stoves <stoves at lists.bioenergylists.org>; James S. Schoner <jss at bitmaxim.com>; mmanzura at yahoo.com 
 Sent: Tuesday, March 15, 2016 9:47 AM
 Subject: [Stoves] Heavy metal-pipe gasifier Re: Idea for cooking on a TLUD
   
  Cripsin,
 
 The metal-pipe version you described could have some practical implications for use with biomass as well as coal.   
 
 We will assume that scrap pipe is available and cheap.
 
 Pipe will withstand the corrosion well.
 
 Pipe of such dimensions will be emptied / cleaned at a door on the side near the bottom (or with a trap-door through the bottom which would be more involved and require legs/supports.)  There would be no allowance for tipping over to dump out char or ash.
 
 The empty unit will stay hot/ warm for quite a while, so it probably should not be reloaded and reignited as a TLUD / MPF unit right away.   (We lack experience about this.)
 
 After a TLUD operation with MPF (migratory pyrolytic front), the fire will be at the bottom.   The unit COULD be continuously feed additional fuel from the top, opperating as a traditional updraft gasifier.   Note that this would be bottom burning like an incinerator, which generally causes worse emissions unless additional adjustments are made.   The entry points and amounts of air (primary and secondary) can greatly impact this performance.  For some societies and situations, this might be appropriate.
 
 REQUEST:
 Who has conditions to do the development work about this type of device?   NOT a tinsmith's job!!!  Please volunteer.   Or make a request for some minor financial assistance.   
 
 Remember that this can have significant usefulness in colder climates where room heating is also of value.
 
 Crispin's time in Tajikistan is limited.   We need some continuity.   Maybe a team effort.   We can start by bringing together the various messages about this, including Crispin's photos.  
 
 I will participate, but I do not work alone any more.  Make yourself known!!!
 
 Paul
 Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:  psanders at ilstu.edu
Skype:   paultlud    Phone: +1-309-452-7072
Website:  www.drtlud.com On 3/13/2016 3:25 AM, Crispin Pemberton-Pigott wrote:
  
 #yiv9254643893 body {font-family:"Calibri", "Slate Pro", sans-serif, "sans-serif";color:#262626;} Dear TLUD Cookers 
  This is a top view of the cooking space on the Tajiki TLUD. The large circle is 2.7mm mild steel sheet and the hole is made with a plasma cutter. The diameter of the hole is such that the top edge of the rather thick walled body serves as a holder for the cut-out.  
  This deletes the usual ring that normally has to be cut separately and welded ‎under the outside diameter.  
  Using a plasma (in this case one with a fairly wide kerf - 1.6mm) means the cutout can be used if the hole diameter is pushed out pretty much to the limit‎. It sits on top of the pipe just enough to weld it on (the welding heated the inner edge and discoloured it).  
  The cutout thus cannot fall into the pipe even though it is 3.2 mm smaller than the hole. The main combustion action is directly under the plate so it gets pretty hot:  >400 ‎C on the upper surface. If a cast iron disk were used it would last longer.  
  Regards  Crispin in Urumqi 
  
  
  
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