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close this book Boiling Point No. 13 - August 1987
View the document SAFER AND LESS SMOKY STOVES
View the document COOKSTOVE SMOKE AND HEALTH
View the document THE PERFORMANCE OF A MULTI-POT STOVE ; TOXICITY OF FUMES
View the document CARBON MONOXIDE CONTAMINATION IN DWELLINGS IN POOR RURAL AREAS OF GUATEMALA
View the document SARVODAYA GIVE PRIORITY TO HEALTH AND SAFETY IN SRI LANKA KITCHENS
View the document STOVE EFFICIENCIES AND HARMFUL EMISSIONS
View the document IMPROVED STOVES: SAFETY IS IMPORTANT TOO
View the document BURUNDI IMPROVED CHARCOAL STOVES
View the document TRADITIONAL DOMESTIC HEATING IN AFGHANISTAN by Abdul Shakoor Raji
View the document UGANDA CONSIDERS 2.45 MILLION NEW STOVES PLAN
View the document MOROGORO FUELWOOD STOVE PROJECT TANZANIA
View the document SIERRA LEONE WOODSTOVE TRIALS
View the document DOMESTIC ENERGY IN THE SAHEL
View the document FIREWOOD CONSUMPTION BY THE TOBACCO INDUSTRY
View the document BRUNTLAND COMMISSION REPORT
View the document IMPROVED CHULHA
View the document READERS VIEWS AND QUESTIONS
View the document NEWS
View the document PUBLICATION

THE PERFORMANCE OF A MULTI-POT STOVE ; TOXICITY OF FUMES

By W.F. Sulilatu, TNO, May 87, 27 pp

Summary Extract

This report describes the measurements to determine the performance of the Multi Pot Stove. The stove is designed for the typical West African cooking pots and is suitable to contain various pot sizes. After attention is given to the operating principle the efficiency, power range and combustion performance of the stove are treated.

A number of experiments have been carried out in order to investigate the influence of the combustion chamber height on combustion quality. The Index of Toxicity as a function of the power output is determined. The combustion quality of the Multi Pot Stove is acceptable for a woodburning stove.

The report compares the performance of the stove ( I -pot, portable, chimneyless, woodburning, metal/ceramic/vermiculite) with 3 recently developed West African stoves, Mai Sauki, Malagashe and Foyer Ameliore Metallique Multi Marmite (Niger). On the basis of the tests used, it is considerably more fuel efficient than the first two and slightly better than Multi Marmite.

The report is particularly interesting as it reports tests on the fumes produced to give an Index of Toxicity. This is the co/co2 ratio in the air collected in a cowl over the stove. The measurement and analysis of fumes from a chimneyless stove is obviously very difficult and may not give realistic results for Third World chimneyless stoves. The indices quoted range from 2-3 up to 5-12 compared with the Dutch national maximum prescribed of 1. The report therefore says that the stoves are not recommended for use in badly ventilated kitchens.


Figure 1

Figures are not quoted for other potentially dangerous gases or for particulates, some of which may be carcogenic. Tests need to be made with other fuels such as dung, residues, briquettes and charcoal for performance as well as emissions if the stove is to be widely promoted.

The multipot stove is portable and so would normally be used out of doors and so fuel efficiency should be measured in such conditions of wind rather than still air. Portability means that the stove could be taken into a badly ventilated kitchen on a wet day and cause unexpectedly high concentrations of fumes. These dangers are, of course, present with any chimneyless stove used indoors.

If the health risks from fumes are as serious and widespread as indicated in some of the articles in this journal, perhaps bodies such as TNO which have good laboratory facilities should seek to develop more accurate and comprehensive ways of testing Third World stoves and should initiate field tests to validate their lab. results.