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]

Direct[edit]

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.

Indirect[edit]

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

References[edit]

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

External links[edit]

See also[edit]

Solar cooker