Solar dryer

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Solar dryers are devices that use solar energy to dry substances, especially food. There are two general types of solar dryers: Direct and indirect.[1]


A schematic of a direct solar dryer

Direct solar dryers expose the substance to be dehydrated to direct sunlight. They have a black absorbing surface which collects the light and converts it to heat; the substance to be dried is placed directly on this surface. These driers may have enclosures, glass covers and/or vents to in order to increase efficiency.


In indirect solar dryers, the black surface heats incoming air, rather than directly heating the substance to be dried. This heated air is then passed over the substance and exits through a chimney, taking moisture from the substance with it.

Industrial indirect solar fruit and vegetable dryer

See also[edit]

Solar cooker


  1. ^ Norton, Brian (2013). Harnessing Solar Heat. Springer. ISBN 978-94-007-7275-5. 

External links[edit]