An experimental study was carried out on an indirect solar dryer operating with natural convection. The study focused on the behavior of three parameters over time. Solar radiation at the measurement site, the temperature of various elements of the collector and of the air at four precise locations inside the dryer, and the velocity at its outlet were measured. The results of the five-day average measurements showed that the solar dryer has a uniform temperature profile inside the drying chamber. The average values for solar radiation, air temperature in the chamber and air velocity at the chimney outlet are 505.4W/m 2 , 50.7°C and 0.8 m/s respectively. Added to these are the average temperatures of some of the collector's components and of the air leaving the collector. In view of the temperature levels reached in the dryer, drying operations can be carried out.

Experimental study, indirect solar dryer, natural convection, physical parameters