November 2011

Cecil Cook with Technoshare, November, 2011


Baseline Study of the Socio‐economic Patterns of Charcoal, Wood and Stove use in greater Lusaka, Zambia

Some highlights:

  • Previous stove improvement projects have failed to properly appreciate the central role played by one and two person tinsmith enterprises that produce and sell ordinary mbaulas at very low prices. The tinsmiths of Lusaka constitute a well distributed network of producers and sellers of ordinary mbaulas fabricated from scrap sheet metal who conveniently service all the major markets and townships of the city.
  • In addition to underestimating the multiple competitive advantages of a well distributed network of tinsmiths who fabricate and directly sell a charcoal stove that everybody knows how to operate, previous stove improvement projects failed to appreciate just how poor the bottom 2/3rds of the Lusaka economy really is and how little money low income families are able to save from their daily and weekly income for the purchase of a replacement mbaula when the old one finally breaks down. It is the initial retail price of an improved stove, not how much money it will save a household during the course of a month, that determines whether they are willing and able to spend two, three, four or more times the K4 000 to K6 000 for a 20cm ordinary mbaula. The ordinary mbaula is the industry standard. Every household without access to firewood, no matter how poor, has to pay out at least K4 000 once or twice a year to purchase a replacement mbaula.

Cecil did a good job of discovering the buying patterns in households of at least 3 different income levels, and uncovered that the ordinary (less effecient) Mduala stove has great traction among ordinary lower income members of Lusaka Zambia because the stoves work as expected, and they are inexpensively produced by local stove manufacturers.

He has also shared with us some of the highlights of the report in the attached pdfs.

On a recent trip to Haiti I was finally able to construct my CharBowl(tm) charcoal stove. It uses two nested stainless steel bowls (5 quart and 8 quart (4.7 liters and 7.6 liters))for durability and reflectivity with castable insulating refractory between them to reduce conductive heat losses. It has a 6.5" (16.5cm) dia cast iron grate for durability. It has a secondary air pipe to reduce CO emissions and increase heat output. The secondary air outlet pipe is 3/8" (10 mm) nominal (ID 0.493" 12.5mm; OD 0.675", 17mm) black iron with a Tee fitting on top to keep charcoal from dropping into it. 3/4" NC 10 (19mm 2.5) machine threads were cut over the pipe threads. This allowed the use of a split nut and flat washer inside and outside the bowls to hold the bowls together. The elbow is 3/8" to 1/2" . The inlet pipe is nominal 1/2" iron (ID 0.622" 16mm; OD 0.84", 21mm). The bowls sit on a stock pot base for stability and primary air control. (I couldn't get my hands on the stainless pot I really wanted to use for the base. I'm planning to build another with such a base now that I'm back in the States.)
I hope to get some testing done on my second prototype.
It can be used as the base of a TChar stove.Nike Air Force 1 '07 Lv8 Utility White/White-Black-Tour Yellow – nike dunk high pro sb kentucky derby 2017

Has anyone experimented with using a bundt shaped pan for improved heat transfer? It is an open topped donut shaped pan usually used for baking cakes. It would have more surface area for better heat transfer. New Arrivals - Check out the latest sneakers at Capital.

Jan Bianchi, November, 2011

Tom varios amigos me han escrito que no reciben el documento aqui te lo mando, si lo van a poner en la web por favor agregar los siguientes comentarios

  1. Està fabricada con làmina de 3 milìmetros en la parte exterior y la càmara interna es de tubo acero al carbòn de 5 milìmetros
  2. tengo varios modelos en pruebas con gente que la usa todos los dias y los resultados hasta el momento son los siguientes
  3. A- en nuetro medio un negocio comun es la venta de tortillas, una de las usuarias ha logrado producir 800 tortillas con 10 libras de leña.
  4. B- la primera estufa con 2 quemadores tiene ya 8 meses de prueba y las condiciones de la càmara son exelentes no se ve deterioro alguno, esto nos da un parametro de vida de mas o menos 4 años de uso diario.
  5. C-los usuarios que estan haciendo las pruebas estan muy contentos por el desempeño y el ahorro, pues antes gastaban $7.50 usd en gas licuado (LPG) y con este modelo ahorran $5.00 por dia con un ahorro total de $1,800.00 usd por año
  6. D- los resultados finales con relacion al peso de la leña en comparacion de estufa tradicional estaran listos en 2 semanas.

Alexis Belonio, Victoriano Ocon, and Antionio Co

Garbage-In Fuel-Out (GIFO) Project,
Suki Trading Corporation, Lapu-Lapu City, Cebu, Philippines

This project is a cooperation between Suki Trading Corp. and Kanvar Enterprises and the Centre for Rice Husk Technoloy (CRHET).

Paal Wendelobo, October, 2011

The Peko Pe TLUD project in Zambia is going well.

Paal describes it best:

" The main principals for our projects I will call it community based participation both for fuel and for stove productions. Utilization of local resources with other words.. The Peko Pe is designed for production by local tinsmith with the tools they might have. They only need a template and a model; they have the knowledge how to make it.

" First of all we discuss the need of changes, and then on the fuel side we start up with registration of alternative biomass for fuel for briquetting, energy forestry for fuel production. We always start with the fuel .to be sure there is sufficient quantities and to an affordable price.

"The charcoal business, which represents about 15 % of the adult population, has to be involved from an early stage of the project. All kind of activities on the household energy sector will in one or another way have an influence of their business, and with biochar we don’t know what will happen, but that is one of the ting we will try to find out. Any how for the charcoal business it is just to change from charcoal to alternative biomass for household energy.

"The energy loss by production of biochar for soil improvement is almost equivalent to the energy needed for the farmer to cook if you include the African way of thinking time is coming not like by us time is running That is a big difference. A household need about 2,7 kg charcoal a day for cooking. Form about 10 kg of dry wood you will get 2,7 kg of charcoal for one day cooking and no biochar. From .10 kg of dry wood you will get 10 kg of woodchips and that will be for 2 ½ day of cooking into a TLUD-ND. and about 2.7 kg of biochar. The pilot project will tell us if this is right or wrong."

" A common Miombo forest in Africa will give about 3 ton wood per ha a year. 3 ton of dry wood will give 800 kg of charcoal. A household of 5 consume 2-3 kg charcoal a day or about 800 kg a year. To produce 3 kg of charcoal you need 10-12 kg of dry fire wood in a common kiln. That will give one day cooking on a charcoal stove, and almost no biochar. 10-12kg dry chopped wood will give 3 days of cooking on a TLUD-ND or another FES and 2.5 kg of biochar
Energy forestry using just the sprouting every year can give up to 10 ton wood per ha a year, easy to cut to appropriate fuel for TLUD-ND’s or other types of FES. By adding some biochar to soil of bad quality 20-30 % increased yields can be obtained, which will give more food, more household energy, more jobs, better economy, better health for women and children and saving the forest. It can probably be as simple as this and is that not some of what we are looking for and need?
We know some changes have to take place on the household energy sector and we have to start somewhere. Why not start with small scale farmers on sandy soil, and from there develop the new household bio-energy strategy for developing countries. Probably also with the charcoal business, they have the whole infrastructure intact and can easy change from charcoal to alternative biomass like chopped wood or pellets from agriculture and forestry related waste. "

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