Solar energy has great potential for many
low temperature applications, especially the drying of agricultural
products (Karim and Hawlader, 2006; Shobhana
and Subod, 2012). Air heated with solar energy can be utilized
directly in the drying process, reducing consumption
of non-renewable sources of energy.
Current foodstuff drying systems have high operating
costs. The 7–15% of the quantity of industrial energy in
industrialized countries is utilized in foodstuff drying
(Keey, 1992).
Brooker et al. (1974) found that high temperature drying