Improved Biomass Cooking Stoves

Boiler Stove Idea
Frans Peeters, July 25, 2006

Bangladesh - Improved stove can save sixty-five per cent fuel woods
A.M. Hasan Rashid Khan, Institute of Fuel Research & Development (IFRD),BCSIR

Berkeley Tara - Darfur Improved Stove (pdf)
Ashok Gadgil and Susan Amrose, Lawrence Berkeley National Laboratory (LBNL), July 15, 2006

I returned two days ago from Darfur. Susan Amrose is still in Khartoum, will return tomorrow. We visited El Fashir (and Abu Shouk camp), Nyala (and Otash camp), and of course Khartoum. Our hosts for this trip was the UN Population Fund (UNFPA) and CHF International.

Darfur FES

I would like to send you all the powerpoint presentation that Susan and I gave at the meetings of NGOs and funders in Khartoum, Nyala and El Fashir, organized by UNFPA. We think the presentations were very well received.

kind regards,

-- Ashok

Baking using (Tanzanian) charcoal stove
Miriam

See also Baking Using Charcoal/Wood Stove

Mkaa = charcoaladidas superstar damen glitzer silber

Improved Mali Stove
Crispin Pemberton-Pigott, New Dawn Engineering, July 21, 2006

Dear Friends

I have heard confirmation from FASEN in Dakar (Senegal) that the women cooking at the ProBEC head office are using 50% less charcoal with their 'improved Malgach' stove (pronounced mal-gash).

We know this as the garden variety Mali stove - a very simple metal, inverted, truncated pyramid sitting on a square stand with one side missing attached to a flat, square base. There are millions of them all over Africa.

We added a door to close the open side in the stand, and another truncated, inverted pyramid to the top, creating a counter-flow air preheater. The air now only enters from below when it is being lit. There are two bricks in the base to contain heat from the grate and pass it to the incoming air.

The charcoal is loaded in the usual way and lit. A metal rod bent into a triangle is dropped in and a square sheet with a pot skirt is then dropped on top of everything, closing in the fire. The rod keeps the pot off the charcoal - preferably a 50mm gap.

The fact that the women are putting in 1/2 the charcoal normally used is not the end of the story. The stove is designed for 2 kg of charcoal so putting in 1 kg is leaves empty space. In reality the stove could be reduced in size by 30% in length, breadth and height reducing the material cost to approximately that of the original, larger, more wasteful stove. The gap between the two 'pyramids' is 13 to 16mm.

The Fuel Composition-Conversion Diagram (pdf)
The Equivalence Ratio: The Key to Understanding Pyrolysis, Combustion and Gasification of fuels (pdf)

Relationship between High and Low Power Carbon Monoxide and Particulate Matter Emissions in Rocket Stoves (pdf)
Dean Still and Nordica MacCarty, Aprovecho Research Center, July 13th, 2006

T-LUD Pellet Stove at BSNB4
Kevin Chisholm, July 8, 2006

I have had the opportunity to attend a local event, the BSNB4 on 2 June 2006, where some impressive technology, at early stages of development, was presented. One of the presentations, a T-LUD pellet stove, burning a 25 pound bag of wood pellets in 15 minutes, had a few rough edges, but it certainly brings the T-LUD to a new height. A suitable exhaust hood would, of course, be required for safe indoor use. See picture.