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close this bookGATE - 1988/01 - Micro-hydropower (GTZ GATE Magazine, 1988)
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Biogas Utilization
Oil Press
New SATIS Catalog



Engines for Biogas
With the steady increase in demand for practical exploitation of renewable energy sources, the transformation of biogas into shaft or electrical power appears to be one of the options for biogas utilization that make good sense.

This book is intended as a source of information not only on the various technical aspects of modifying internal combustion engines- both diesel and gasoline - to operate on biogas fuel, but also on system planning and how to run these engines economically in a system comprising the fuel-generating biogas plant and the power-consuming driven equipment. A basic interest in and grasp of technical matters on the part of the reader is assumed.

The book also contains information on utilization of the engine's waste heat, plus a commented list of manufacturers of biogas engines and equipment available for do-it yourself modifications.

Klaus von Mitzlaff: ,~Engines for Biogas", 1988, 133pages. DM24.50. ISBN3-528-02015-6.

Appropriate Technology for Village Women
Since 1980, in collaboration with the Malian Ministry of Agriculture, GATE has been implementing a project based on the design and dissemination of an oil press for processing shea-nuts by village women. The new technology is helping to improve economic conditions for the women and proved a successful first step in a broader strategy of village development. Shea-butter is a fat which is highly valued in Mali for cooking purposes.

The author not only describes the practical development work done, but also its socio-economic impact at village level in Mali.

Thomas NieƟ: "Technologie appropriee pour les femmes des villages", 1988. 42 pages. DM 9.80. ISBN 3-528-02035-0.
Apart from the French edition presented here, a German edition has already been published, entitled "Technologieentwicklung fur Dorffrauen"(lSBN3-528-02025-3).

SATIS Catalog 1988
The 1988 SATIS Catalog, the fourth edition, provides a world of information for a world in development. It lists 657 new books, manuals, guides, videos, slide sets and posters available from the bookshops run by the 35 members of SATIS. It provides practical and proven information on communication, organization, energy, building, agriculture, sanitation and health, to mention just a few items.

SATIS is a growing, world wide association of organizations with a wealth of skills and expertise in communication, documentation, action-research and projects, as well as in supporting local development initiatives and national programmes. The newly published 1988 SATIS Catalog offers the reader complete access to the world's widest and largest stock of information on development.

SATIS (ed.): "SATIS Catalog 1988". 82 pp. Price: $ 4.00. ISBN 90-6830013-X. Please send your orders to

P. O. Box 803
3500 A V Utrecht
The Netherlands

Micro-Hydropower Sourcebook
Although worldwide interest in harnessing small-scale hydropower resources by means of microhydropower plants is increasing, few publishing guides exist for those implementing such projects.

Some publications deal primarily with larger small-scale hydropower plants, leaving developers of microhydropower sites with few options but to reduce the scale of designs and approaches to implementation that are more appropriate for large plants. Other publications cover micro-hydropower technology but are incomplete, e.g. making only cursory mention of power canals, even though a survey of microhydropower plants around the world would indicate that power canals are used at most sites. And finally, most publications are written primarily for a Western audience and address Western needs within the context of Western standards and realities.

In this Sourcebook, the author presents detailed descriptions of many aspects of the planning and implementation of micro-hydropower schemes and documents experiences from around the world, including his own. Allen R. Inversion is an experienced hydropower engineer who has been working intensively in this field for more than ten years now.

The technology associated with micro-hydropower plants in developing countries spans a much broader range of options than that associated with large hydropower plants. The Sourcebook is therefore faced with the challenging task of covering each of these options.

In some countries, local technical expertise has often been developed by trial and error. For people faced with such situations, the Sourcebook can provide a reference and guide to help them build on their experiences. In other countries, local expertise is not readily available and consultants may be employed. However, few consultants have experience either in implementing cost-effective micro-hydropower schemes or in the conditions encountered in rural areas of developing countries. In such cases, the Sourcebook can serve as a detailed primer for people with basic technical aptitude, covering many aspects of planning for, designing, and implementing micro-hydropower schemes.

The 285-page book is written in plain English and illustrated with numerous black-and-white photo graphs, diagrams and sketches. All this makes it easy to understand. The individual chapters are: measuring head and discharge, stream flow characteristics and design flow, site selection and basic layout, civil works, turbines, hydropower: electrical vs. mechanical, with discussions of governors and electrical equipment. A further forty pages deal with case studies. Among other things, the appendices deal with conversion factors and constants, preparing concrete, and masonry. A list of references completes this commendable book.

Allen P. Inversin: "Micro-Hydropower Sourcebook. A Practical Guide to Design and Implementation in Developing Countries". 1986. 285 pages, numerous illustrations. The Sourcebook is available from:
NRECA International Foundation
Attn: Sourcebook
1800 Massachusetts Avenue N. W.
Washington, D.C. 20036, USA

The book costs US$ 32.50. Further copies are available at a reduced price of US$ 25.00. Postage (surface mail) and packing cost an additional US $ 4.00 for North America and US$ 5.00 for overseas. Air mail rate: North America: US$ 5.00; Central America: US$ 9.00; Europe and Africa: US$ 13.00; Asia and the Pacific: US$ 18.00.

CITA T3 Crossflow Turbines
At the end of last year, CITA (Centro de Ingenieria pare Tecnologia Adecuadas) in Ecuador published a manual with the title Turbina de Flujo Cruzando CITA T3, in which a crossflow turbine developed from the Nepalese BYS-T3 is presented. The use of this turbine is described in brief and the technical operating data given. The main part of the publication is a comprehensive chapter covering 85 pages and containing detailed design drawings. The publication is available in Spanish only and can be ordered (cost: US $ 5.00) from:

Attn. Maria Eugenia Pesantez
Casilla 1024

Edible Mushrooms
We took up the subject of edible mushrooms in our 3/87 issue, in an article entitled "Edible Mushrooms - A Weapon to Fight Starvation" (p. 30 to 32). Now we would like to inform our readers of further publication on this subject. A bilingual brochure (English/German) has been published by the Versuchsanstalt fur Pilzanbau and the Gemeinschaft der Freunde und Forderer der Versuchsanstalt fur Pilzanbau der Landwirtschaftskammer Pheinland e. V. (Mushroom Cultivation Experimental Establishment and Association of Friends and Benefactors of the Mushroom Cultivation Experimental Establishment of the Rhineland Chamber of Agriculture). If you would like a copy of this publication, contact the author:

Professor Dr. Jan Lelley
Versuchsanstalt fur Pilzanbau
Huttenallee 235
4150 Krefeld
Federal Republic of Germany