Simple solar drying system suitable for different agricultural fresh commodity was evaluated to dry
banana pulp. The drying system mechanism was flexible, it was constructed from cheap and available materials
(i.e. wood, glass plastic and metals). It composed solar collector, drying chamber and solar chimney and/or
blower. The air type solar collector was mounted fixed all the year around at 30°. the drying chamber was flexible
to be 0° and 90° with the horizon axis. Simple passive and active designs were followed to enable save energy
requirement for fan operating. Banana moisture reduction rate, drying coefficient, of banana and the drying
system efficiency were determined. This investigation was carried out at Ismailia, Egypt. Based on the drying
constant the study found that, the horizontal dryer chamber was speeding banana drying over the vertical one
for both of active and passive modes within the time of drying for the site and time of investigations. Drying
system efficiency for the forced convection was higher for the first day comparing with the following days due
to the fast drying in the moisture falling stage.