The Solar Food Dryer: How to Make and Use Your Own Low-Cost, High Performance, Sun-Powered Food Dehydrator by Eben V. Fodor

Author:Eben V. Fodor
Language: eng
Format: mobi, pdf
Published: 2009-05-05T02:41:00+00:00

3-7: The Rodale Plans solar dryer used a downdraft configuration

3-8: The New Mexico solar food dryer combines direct and indirect solar heating. (From How to Build a Solar Crop Dryer, undated, but circa 1980, by New Mexico Solar Energy Association.)

Another noteworthy design is the New Mexico Dryer, a hybrid two-part dryer system that includes both direct and indirect solar heating. The sketches in Figure 3-8 show the front covered with a flexible fiberglass film glazing (like Sun-Lite HP fiberglass. The lower section is the solar collector with a corrugated metal

absorber plate (45 inches wide and 26 inches deep). The glazing runs up and over the food trays to increase solar gain and direct heating action. Dimensions of the fiberglass sheet are 48 inches wide by 8 feet 4 inches long. This appears to be a very effective dryer design that uses direct heating and has an ample glazing area. One can imagine that the food trays would dry faster on the top and on the sunny side, but the trays could easily be rotated once a day for even drying. There's no backup heating in this design, but then you may not need one in New Mexico.

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