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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 4. Two-hour dryer construction

Total time:

2 hours


* To construct a simple solar agricultural dryer


* To discuss group dynamics and problem-solving methods


Paper, pencils, cardboard (boxes and sheets), tape, plastic glazing (polyethylene, polyvinylchloride, etc), staple guns, staples, string, wire, small dimension lumber, small nails, hammers, saws knives, black paint, window screen, and other simple solar dryer construction materials


Step 1. (5 minutes)
State the objectives and outline the session activities.

Step 2. (1 hour, 30 minutes)
Form work groups and construct a solar agricultural dryer.

Trainer Notes

* Note that these work groups will be the same work groups for the larger solar dryers to be built later.

* Emphasize that the dryer can be small, that it should be easily and quickly built and that it may incorporate some of the features covered in earlier sessions.

* Remind the participants that they have only two hours to build their solar dryer and it will be necessary to do just enough calculation to build the dryer without going through more detailed calculations.

* Note that much re-design will occur during the construction of the solar dryers.

* Circulate among the groups and offer assistance when necessary. Be careful not to offer too much help with the design/re-design and decision-making processes of the groups. Intervene only to correct unsafe tool use. Allow groups to learn from their mistakes.

Step 3. (10 minutes)
Have participants clean up the work area.

Step 4. (15 minutes)
Reconvene the group and conclude the session by reviewing and discussing how the groups worked together to construct their fryers.

Trainer Notes

* Encourage the participants to discuss the group dynamics and problem-solving methods used during this session. Focus this discussion by reviewing the processes of design, construction and re-design.

* Encourage the participants to put food in their solar dryers and begin experimental drying.

* Mention that these dryers will be used in Session 6.

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