Types of Solar Dryers
There are mainly three types of solar dryers (3):
1. The absorption or hot box type dryers in which the product is directly heated by sun,
2. The indirect or convection dryers in which the product is exposed to warm air which is
heated by means of a solar absorber, or heat exchanger,
3. Dryers combining the principles of the above two, where the product is exposed to the
sun and a stream of pre-heated air simultaneously.