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Issue 17

Fault Finding and Fixing



Overview

In the early days of 'improved stoves', the only way to test and improve a new design, whether in the laboratory or in the field, was by trial and error. The effect of changes could not be predicted because there was little or no understanding of how stoves worked and what were the critical dimensions. Several years of basic research were needed to learn the chemistry and physics of pyrolsis and burning; to determine the correct proportions of primary and secondary air, the effect of door openings, passages, chimneys, baffles, dampers, pre-heating, insulation etc. and how all these influence performance ie. the overall behaviour, controlability, fuel efficiency and versatility of the stove. Stove designers and manufacturers are now better able to minimise costs without affecting performance.

This technical understanding was needed before studies of user requirements and needs assessment could be made and it was realised that overall cooking times and heat control were at least as important to the housewife as fuel economy. The diversity of new designs from various parts of the world showed the need for standard test procedures and results which would permit independent comparisons by other stove programmes. The stove users or field workers are limited in what they can do to improve a metal or clay stove but in the case of mud stoves, much can be done to correct faults resulting from bad construction or installation. This issue of Boiling Point looks at what is being done to help stove workers 'optimize' new stoves and to see whether better guidelines can be prepared.

However, it is still evident that scientific analysis is not a substitute for practical experience and knowledge gained through kitchen discussions with users and workshop discussions with makers. Stove designing like cooking remains as much an art as a science.

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Table of Contents

Editorial

Fault Finding and Fixing

Authors: BP Editorial Team
In the early days of 'improved stoves', the only way to test and improve a new design, whether in the laboratory or in the field, was by trial and error...
[more]

Theme Articles

Supply of Metal for Jikos (Stoves) in Kenya

Authors: Dominic Walubengo
Metal, charcoal burning stoves have been a feature of Kenyan kitchens ever since their introduction into the country by Indian railway builders in the later part of the 19th century. These stoves... [more]

New Stoves in Zimbabwe

Authors: Keith BennettZimbabwe is full of contrast. Spectacular mountain scenery, rich farming land, arid and fragile areas threatened with desertification, and strange granite rocky outcrops called kopjes, which stand formidably above the surrounding plains,...
Zimbabwe is full of contrast. Spectacular mountain scenery, rich farming land, arid and fragile areas threatened with desertification, and strange granite rocky outcrops called kopjes, which stand... [more]

Carpet Makers Adopt Efficient Dye Stoves

Authors: Andreas Bachmann
Nowadays Nepal has an estimated workforce of 50,000 people involved in carpet manufacturing. This cottage industry has become a good source of income for many families and is a remarkable foreign... [more]

Subsidies: Why, Who, When, Where, How?

Authors: Simon Burne
In every country in the world you can find development programmes which include a large amount of subsidy. Just look at any project or programme concerned with primary health care, education or... [more]

Stove Profiles: Magan Chula

Authors: from ITDG's "Improved Wood, Waste and Charcoal Burning Stoves"
The stove is made from pottery and is surrounded with mud when installed, the finished stove being approximately 80cm x 45cm x 20cm. The pottery sections can be transported in a 60cm x 35cm x 20cm... [more]

Stove Problems - Causes & Solutions

Authors: From ITDG's "Improved Wood, Waste and Charcoal Burning Stoves"
Repair Guidelines for Use in the Field
[more]

Is it fixed? Test it

Authors: Ian Grant
The "stove problem solutions" quoted in the first article from the ITDG "Practitioner's Manual" will help field workers to follow a planned procedure for fixing a faulty stove. However, they may... [more]

Solving Potters' Problems

Authors: Auke Koopmans
During the past twelve years while working with potters producing products such as water jars, cooking pots, stove liners, roof tiles etc. quite a few production problems have been encountered for... [more]

A Watched Pot Never Boils

Authors: Pete Young
One of the best methods of studying burning in a stove under real cooking conditions is to watch the fire develop and observe the flame paths. Most stove users do this instinctively as they cook... [more]

Appropriate Energy Stoves - for Residues Plus Charcoal

Authors: P C Bhardwaj
"The human survival and eating habits, over centuries, depend upon the cooked food and warm habitat during the cold weather. Hungry stomach has no eyes, no understanding, for it, environment does... [more]

Village Biomass Energy Needs and Tree Planting

Authors: N H Ravindranath and R Shailaja
In rural areas of South Karnataka, in India, biomass is used as fuel mainly for cooking, heating bath water and for producing lime and bricks. ASTRA rural energy studies have shown that cooking is... [more]

The Mesquite Tree

Authors: Ian Grant
"The Mesquite is the only shrub that can reach the water table here with its roots. But a mesquite seedling must send its roots down 30 feet or more through dry sand before it reaches the water.... [more]

General Articles

Clay Properties & Formulations:Ceramic Charcoal Stove Manufacturing in Thailand

Authors: Chetr Eimjilkusol
This paper was presented at the FAO seminar on cookstove production held in Thailand in June '88 attended by people from Asia already involved in a variety of areas of stove design, testing,... [more]





Last edited by Mohamed Allapitchai , based on work by raffaella , Mauro Vanzini , Christopher Hughes and Nelson Ko .
Page last modified on Friday 21 of June, 2013 13:22:38 GMT. @HEDON: BWTN

  • A practitioner's journal on household energy, stoves and poverty reduction.


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