Air Relative Humidity, Rh: Relative humidity of air at the
different trials. Figures 3 and 4 represents the relative
humidity versus drying time for the forced convection
mode when the drying chamber created 0° and 90°
with the horizon, respectively. It is also represented in
Figures 5 and 6 for the natural convection mode for drying
chamber of 0° and 90°, respectively. Forced convection
commodity, resulted on reducing the outlet relative
dryer inlet and outlet are shown in Figures 3-6 for the
mode when the drying chamber created 0° and 90°
mode enhanced removing evaporated water from banana
humidity above the inlet as shown in Figures 3 and 4.
The same effect was happened when the natural
convection mode for 0° drying chamber. This reflects
higher drying constant (k) and fast drying rate compared
with the other drying methods.