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Published

2025-04-01

In this issue

Download EDN 169


Direct Solar Dryers

A simple, cheap option for solar food drying

James Dontje

Excerpt:

We have dried a variety of fruits and vegetables successfully with this dryer, using thermometers, dietary scales, and small relative humidity sensors to “calibrate” the drying so that simple visual and texture cues can be used to determine when the food is dry enough for storage. A lot of testing has been done with mango slices –they are more difficult to dry sufficiently in a humid environment and if we can dry them successfully (and we have done so), we think we can dry just about any other food.

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