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close this book Boiling Point No. 26 - December 1991
View the document Stove Technology Transfer
View the document Does Anyone Need to Design a "New" Stove?
View the document Limits of Technology Transfer
View the document A Single Pot for the Pacific
View the document Improved Stove Promotion in Three Indian States
View the document Technology Transfer - The KCJ
View the document Training for Technology Transfer
View the document GATE/GTZ NEWS
View the document Solar Cooking of Traditional Foods in Western Africa
View the document Sri Lanka's Rural Stove Programme
View the document Stove Building & Dissemination in Developing Countries
View the document News
View the document Publications
View the document Letters to the editor

Letters to the editor

Dear Editor

I have conducted further experiments to increase the efficiency of my "Jagadeeshwar" solar water heater described in BP 24.

I simultaneously measured the temperature of water in 2 oil tins, one wrapped with transparent polythene sheet and one without and found that the temperature of water in the covered tin was on average 20% higher. The polythene covering helps to reduce heat lost by convection, to reduce re-radiation and to act as a shield against wind cooling' It helps the tins to attain full temperature early each day because of the residual heat. It protects the black, radiation absorbing paint coating against the weather and the polythene sheet is cheap and easy to replace.

Further details supplied from:

Dr A Jagadeesh

Society of Science for the People

21210 Nawabpet, Nellore - 524002



Dr A Jagadeesh

May I take this opportunity to alleviate a bit the gloomy mood reigning at present in Boiling Point about a failure of stoves to economise firewood in developing countries. In the past decade, Emil Haas and I, we have demonstrated that it is possible to obtained radical cuts in firewood consumption with our multi-fuel community stoves. Such stoves, if fired with combustible waste, (available more often than people think) eliminate consumption of wood altogether. At present we are promoting multi-fuel family and community stoves, without chimneys, destined for the poorest. They cut wood consumption by two thirds, or eliminate it altogether. We have developed kerosene and recently waste oil burning stoves to save fuelwood. They work well and do not pollute the environment. All in all, there are stove models and substitute fuels which could stop the hemorrhage of firewood. The question is why are they not more widely used? (See BP24 - "Should Charcoal Stoves be Promoted" ).

Our complaint goes against the almost complete indifference to the large and increasing role of use of charcoal as a fuel in developing countries. Charcoal is the main killer of forests and women who cook with it. The shift from charcoal to firewood, when burned in fuel efficient stoves could result in an enormous economy in firewood.

Waclaw Micuta of REDI, Switzerland

Technical Enouiries to ITDG

One of the most valuable services provided by ITDG is in answering technical enquines. The Technical Enquiry Unit acts as a focus for the Group's information and advisory service and can respond on a wide variety of topics. The TEU has extensive contacts within the UK and Europe. The stove teem and its associates are et your service in this way.

Please send all enquiries to:

The Manager

Technical Enquiry Office

ITDG, Myson House

Railway Terrace, RUGBY, CV21 3HT,



Telephone: 0788560631

Telex: 317466 ITDG G

Fax: 0788540270

Contributions to Boiling Point

Contributions are invited for the next three issues of Boiling Point, the main themes of which will be:

No: 27 - Women, Stove Programmes & Nutrition

No: 28 - Biomass Combustion, Chimneys & Hoods

Articles for issues 27 and 28 should reach this office by the end of February for issue No. 27 and end of June for issue No. 28.

ISSN: 0263-3 167

Editorial & Production Team

Tapir my Flavell - Production Manager Ian Grant - Editor

Peter Young - Senior Technical Manager

Peter Watts - Programme Manager

Kathryn Clarke - Sector Manager

Agnes Klingshirn - GTZ Representative

Elke Metzen - GTZ Consultant

Specialist Advisors:

Simon Burne - Economist

Emma Crewe - Social Scientist

Caroline Ashley - Social Scientist


M Allen, H & R Chatelain

T Flavell, Agnes Klingshim

K Masakhwe, W Micuta

M Recinos, P Sadaphal, RC Pal, V Joshi

J Usinger, P Young


Cartoons by P Bradbrook

Proof Reading by R Marshall & Peter Watts

Boiling Point is the journal of the Intermediate Technology Development Croup's Fuelfor Food Programme and the GATEICTZ Programme. It is printed on recycled paperby Rugby Community Printworks (aliated to the Rugby Youth Promotion Programme). I TDG is a registered British Charity.

Contributions are welcome in the form of articles of not more than 1,000 words plus line drawings, photographs, simple graphs etc., where appropriate. All correspondence should be addressed to Boiling Point, ITDG, Fuelfor Food Programme, Myson House, Railway Terrace, Rugby, CV21 3HT, UK.

Opinions expressed in contributory articles are those of the authors and not necessarily those of the 17tDG Fuel for Food Programme.

(Readers wishing to enter into correspondence with authors may obtain full postal addresses from the address given above.)

Authors, publishers of books, journals on 3rd world stoves or stove programmes are invited to submit copies for review in Boiling Point.


Intermediate Technology's aim is to enable poor people to develop and use productive technologies and methods which* give them greater control over their own lives and which contribute to the long-term development of their communities. ITDC is a British charity mainly funded by the Overseas Development Administration.