[Stoves] [Gasification] Heating/thermal usage - China workshopnotes

[Alex and Christine English]

Kevin,
One possible way would be to have two or more fuel chambers connected to a single 
burner. A flap valve would allow the transition from the spent chamber to the newly 
ignited one.
Alex 

> Dear Ken Et Al
> 
> The T-LUD is indeed a neat piece of equipment, and it certainly works well 
> for a heating application of short duration.
> 
> I must be missing something, but I can't see a simple way to operate a T-LUD 
> stove on a continuous basis. If more fuel is added on the top surface of a 
> T-LUD fuel bed, it then becomes a "Thin Bed Updraft Gasifier", a "TBUG".
> 
> It seems to me that the essence of a T-LUD is that there is no fuel above 
> the primary reaction zone, where the fuel is gasified, and that it is close 
> coupled to a secondary zone, where gases are burned to completion.
> 
> Would someone be able to explain how a device that was started up as a T-LUD 
> could be operated on a continuous basis as a T-LUD?
> 
> Thanks.
> 
> Kevin
> ----- 
> > Paul,  Stovers and gasification enthusiasts,
> >
> > Thankyou for your report on the proceedings of the ARECOP workshop.  Most
> > interesting reading.
> >
> > It appears to me that applications 3,4,5 and 6 (below) could be met with a
> > T-LUD gasifier of between 20cm and 30 cm diameter.
> >
> > Might this be a common designed element for these projects that could be
> > optimised and shared amongst the participants?
> >
> > regards
> >
> > Ken Boak
> >
> > London
> >
> >
> >> 3.  Abdul Shakoor Sindhu of Pakistan is looking to have relatively small
> > T-LUD
> >> gasifiers provide the heat for the tandoor (tandoori) ovens that are used
> > to
> >> bake roti and other things.
> >>
> >> 4.  C. K. Kumarswamy of Bangalore, India, is focused on the relatively
> > large
> >> cookstoves of the roadside restaurants.  High heat is needed for several
> > hours
> >> at 3 meal times per day.  Fuel consumption currently is about 3 kg of 
> >> wood
> > per
> >> hour per stove (number of pots per stove is not in my notes.).  Some form
> > of
> >> T-LUD is to be used.
> >>
> >> 5.  From two different cities (500 km apart) in Indonesia, Dang
> >> Tanoewiangga and
> >> Hermanto Sudjarwo are interested in two food products made from palms.
> > Both
> >> products involve boiling away the water.  One is to make palm oil from
> >> palm sap
> >> collected from the trunks of some palm trees.  The other is to make
> > coconut
> >> brown sugar from the juice of the white coconut meat (copra).  These use
> >> round-bottom pots of about 30 - 40 liters, and are stirred almost
> >> constantly to
> >> evaporate about 24 kg of water, leaving about 6 kg of oil.  T-LUD
> >> gasifiers with
> >> fuel chambers of 20 cm Diameter x 70 - 90 cm Height (or 30 cm D x 50 -
> >> 70 cm H)
> >> are recommended for the approximately 4-hour process that currently uses
> > about
> >> 2 kg of wood per hour.
> >>
> >> 6.  Rajan Thapa of Nepal explained the seasonal production (Dec to March)
> > of
> >> Lapsi candy made from fruit.  The 100 liter pots (half-barrel of 55 gal
> > drums)
> >> need to come to a boil and then simmer, for a total of 2 hours.  The
> >> calculated
> >> size of the fuel chamber of an appropriate T-LUD gasifier is 30 cm D x
> >> 35 cm H.
> >> (We hope to have a taste of the Lapsi candy and the coconut brown sugar 
> >> at
> > the
> >> 2007 meeting in Bangalore.)
> >
> >
> >
> >
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