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close this bookAppropriate Community Technology - A Training Manual (Peace Corps; 1982; 685 pages)
View the documentThe Farallones Institute Rural Center
View the documentCHP International, INC.
View the documentPreface
View the documentAcknowledgments
View the documentIntroduction
Open this folder and view contentsPhase I: Introduction to training
Open this folder and view contentsPhase II: Earthen construction and fuel-saving cookstoves
Open this folder and view contentsPhase III: Pedal/treadle power
Open this folder and view contentsPhase IV: Solar water heaters
close this folderPhase V: Solar agricultural dryers
View the documentPhase V Calendar
View the documentSession 1. Introduction to agricultural dryers
View the documentSession 2. Tour of solar dryers
View the documentSession 3. Solar agricultural dryer design procedures and rules of thumb
View the documentSession 4. Two-hour dryer construction
View the documentSession 5. Review of existing solar dryer plans
View the documentSession 6. Smoke testing solar dryers
View the documentSession 7. Introducing new technologies: solar dryers
View the documentSession 8. Design of solar agricultural dryers
View the documentSession 9. Site selection and preparation
View the documentSession 10. Construction of solar agricultural dryers
View the documentSession 11. Issues and methods in development and diffusion of appropriate technology
View the documentSession 12. Natural cooling
View the documentSession 13. Approaches to health systems
View the documentSession 14. Nutritional gardening
View the documentSession 15. Practical drying tips
View the documentSession 16. Cardiopulmonary resuscitation
View the documentSession 17. Dryer assessment and modification
View the documentSession 18. Introduction to cost benefit analysis (cba)
View the documentSession 19. Presentation of solar dryers
View the documentSession 20. Introduction to the final phase of the training program
Open this folder and view contentsPhase VI: Concluding the program: The energy fair
Open this folder and view contentsAppendices

Session 10. Construction of solar agricultural dryers

Total time:

16 hours


* To use various tools in the construction of solar agricultural dryers


* To build a solar agricultural dryer


* To develop a complete explanation of the solar agricultural dryer


Attachment V-8-A, "Materials Price List"


Tools and materials as specified in the participants' designs Procedures:

Trainer Notes

This 16-hour session allows much latitude for individual trainer styles. It follows a format similar to the construction sessions for pedal/treadle power in Phase III and the solar water heaters in Phase IV. The following notes are here to give some guidance and share some experiences that have worked well during our training programs.

The session does not have to happen all at once. Since it is a 16-hour session, it should be complemented with other sessions, such as Health & Nutrition, The Role of the Volunteer in Development and other Core Technology sessions, and the following solar dryer sessions: Practical Drying Tips (Phase V: Session 15), Dryer Assessment and Modification (Phase V: Session 17) and Cost Benefit Analysts (Phase V: Session 18). See the phase calendar.

It is helpful, in fact, to spread the construction time over as many days as possible, because the participants will then have more "spare time" to discuss their projects and their problems outside of session time. Six or eight hours of the day give the participants sufficient time to set up, build and clean up.

Step 1. (Approximately 14 hours)
Have the participants form construction groups and build their solar dryers.

Trainer Notes

At the beginning of each construction period, have the participants discuss the events of the preceding day. Focus the discussions on the group dynamics and problem-solving methods that are being used by each group, what's working and what's not working, etc. This should take 15-25 minutes, depending on how many issues need to be brought up.

Remind the participants of how many hours remain in the construction part of the phase and that some time near the end of the phase should be spent on the development of a presentation for their device. When time begins to get short, encourage the participants to focus on the essential tasks only, and to divide them among group members to help speed up the process.

During the construction periods, keep in touch with how the groups are proceeding, taking time, when necessary, to show people how to properly use and care for tools.

Don't intervene every time the group or an individual makes a mistake. Mistakes are an important part of the learning process. Intervene only if the safety of the group is in danger or if a certain decision will prove fruitless and take a large amount of time away from the group.

Explain that any group finishing one project may go on with another small project, begin preparations for the presentation of their device or research other types of solar dryers.

Allow 10-20 minutes at the end of each construction period for cleanup of the work site and shop area.

At the end of the final construction session, plan about half an hour for a thorough cleaning of the work site and shop area.

Step 3. (Approximately 2 hours)
Have the participants prepare for the final presentation of their solar dryers. Provide them with relevant hints or guidelines.

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