| Boiling Point No. 08 - December 1985 |
|REVIEWS AND SUMMARIES|
Review of booklet "Stoves to Save Forests" by W. Minute of The Bellerive Foundation of Geneva - January 1985, 41 pages of dual text English and French, with illustrations.
This booklet is intended for Third World stove designers and gives a brief description of six metal stoves and three clay/metal stoves for domestic use and one clay/metal community stove. Drawings of each stove show the main dimensions along with the results of modified "Boiling Water Tests" using wood fuel.
Some of the stoves are Micuta's developments of existing African Jiko patterns, others are adaptations of traditional European stoves. The fuel efficiencies given vary from 35-47% for metal stoves and 30-46% for clay/metal stoves tested in European winter conditions, outdoors and under cover. Some of the metal stoves are portable, six have chimneys (no details of size or construction). The stoves are stronger and better made than stoves in general use in Africa and Asia and will no doubt be more expensive as well as more durable. All have wire basket grates. Most of the metal stoves are double walled, some insulated but the Hunza (two pot, chimney, metal stove) is single walled as it is intended for areas with some cold conditions requiring space heating. Despite this, the fuel efficiency for a Boiling Water Test is given as 47% and SFC as 0.186.
Micuta believes that only well made stoves, mainly of metal and designed to suit particular metal pots (with lids) can give the fuel saving needed for the campaign against de-forestation and starvation to succeed. He also suggests that in disaster situations large quantities of metal stoves may need to be imported from industrialized countries which produce the sheet metal etc.
Unfortunately his booklet does not provide a comparison with traditional stoves or stoves such as the Improved Kenya Jiko tested under the same conditions. Nor does it give cost figures and so their possible impact on national fuel statistics and economics cannot be estimated, even assuming that the less privileged urban householders were able and willing to buy them. The exception to this is the community stove for which he quotes savings of up to 90% of wood used.
Nevertheless, he gives some new designs and ideas for what may be the next generation of improved metal stoves for the rapidly expanding urban Third World. It would be interesting to hear if there are similar trends in Latin American countries with higher per capita incomes.