DESIGN PARAMETERS OF A SHALLOW BED SOLAR CROP DRYER WITH REFLECTOR

In this communication, energy balance equations for a passive solar cr op dryer with shallow bed, including the effect of a reflector placed over the wall of the chimney. have been written in terms of design and climatic parameters. The effects of thermal storage and the crop have also been taken into account. Analytical expressions for the outlet a ir temperature of the collector and the temperature of the storage mat erial and the crop have been derived. On the basis of the analytical r esults. it is observed that the drying time is significantly reduced d ue to the increase in thermal energy on the collector by the reflector .