| Boiling Point No. 25 - August 1991 |
I find Boiling Point very useful in my attempts to convince the women of Lichinga that they should change their cooking habits by using a stove. I'm not making much headway (except with the more educated) - old habits die hard. The problem is not too acute here since we have large pine forests and the women are allowed to send their children up the trees to cut branches (so that the pines grow straight) but they still have to walk long distances with huge bundles on their heads.
In other areas of the country the problem is acute - the drought areas. I produce a monthly page in a national newspaper and have published 4 illustrated articles on how to make different types of stove (in Portuguese). So some of the information in Boiling Point is reaching some of the people in Mozambique.
Julia Warren, Technical Advisor Communications in Niassa, Mozambique
Mr. Rao from India writes with reference to the Chilean Communal Water Heater as described in BP24, page 7 &8.
The Chilean communal hot water stove has several points of more than passing interest and is capable of attaining a high level of utilization efficiency.
Water completely surrounds the combustion chambers, thereby trapping maximum amount of dissipated heat. If the fuel/air inlet was made sufficiently large, the fire chamber could be easily cleaned out by inserting the arm.
The height of the chimney pipe would seem to be a critical parameter and the draught created would cause air to flow in with sufficient force and turbulence to burn away any dry bulky organic crop and weed wastes introduced through the fire/air inlet.
Lighting the fire should present no problem since it can be started by throwing a lighted oil soaked rug into the fuel-charged into fire chamber. The name would tend to be deflected to the chimney by naturally induced circulation.
The inner fire chamber may be bolted down to the outer 200 m drum. It can be welded down permanently.
Excess chimney height would create sufficient draught to pull the burning fuel particles up the chimney pipe. In some old steam raising installations in India (some 30/40 years ago), designed to burn groundnut shells, too tall a chimney would cause the shells to be sucked up the chimney. The design is suitable for a wide variety of bulky crop residues like coffee shellings, groundnut shells, rice husk, sawdust, wood shavings etc.
Warm greetings from Vom.
We want to express our sincere gratitude for the activities you are involved in as is obtained in your magazine "Boiling Point". I have gained much from reports and write ups on stove and energy development in the April issue (21) of your magazine and wish that I had found out about this long before now. This is because we have wanted to start the project on the improved cooking stove and have lacked the necessary knowledge and skills to start.
We would need your support on this project as it is very important if the environment must be preserved especially in this part of the world where 70% of the populace depend on wood for energy - cooking.
Andrew Gwaivangmin, Church of Christ in Nigeria, Nigeria
Technical Enquiries to ITDG
One of the most valuable services provided by ITDG is in answering technical enquiries. 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 UK and Europe. The stove team and its associates are at your service in this way.
Please send all enquiries to:
The Manager Technical Enquiry Office ITDC, Myson House Railway Terrace, RUGBY, CV21 3HT,
Telex: 317466 ITDG G
Contributions to Boiling Point
Contributions are invited for the next three issues of Boiling Point, the main themes of which will be:
No: 26 - Transfer of Designs & Technologies
No: 27 - Women in Stove Programmes
Articles for issues 26 and 27 should reach this office by the end of October for issue No. 26 and end of February for issue No. 27.
ISSN: 0263-3 167
Editorial & Production Team
Tammy Flavell - Production Manager
Ian Grant - Editor
Peter Young - Senior Technical Manager
Kathryn Clarke - Sector Manager
Agnes Klingshim - GTZ Representative
Comelia Sepp - GTZ Consultant
Simon Bume - Economist
Emma Crewe - Social Scientist
Tim Jones- Ceramicist
D Bhardwaj, G Barnard, S Burne
E Crewe, R Edwards
M Munasinghe, I Ramakrishna, H Schneiders
M Skutsch, L Shrestha
P Wagner, I Waterkeyn
French Summaries by Bois de Feu et Energie
Cartoons by P Bradbrook
Boiling Point is the journal of the Intermediate Technology Development Group's Fuel for Food Programme and the GATE/GTZ Programme. It is printed on recycled paper by Rugby Community Printworks (affiliated to the Rugby Youth Promotion Programme). ITDC 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, ITDC, Fuel for 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 ITDG Fuel for Food Programme.
(Readers wishing to enter into correspondence with authors may obtain full postal addresses from the address given above).