A good representation of experimental solar drying curves was
attained by simulation using the model developed, taking into account
the low number of experimental points and their high
variability.
The model developed may be applied for simulation of solar
drying of different foods, once specific characteristics are known
(shrinkage during drying, geometrical features, water diffusivity,
specific heat, radiative properties and sorption isotherms). The
model can also be merged with a heat transfer model representative
of the solar dryer phenomenon (green-house type effect), for a
full simulation obtained straightforward from external air conditions.
Simulations obtained with the model can be a valuable tool
for predicting drying times and consequently planning the production
of dried foods or even to optimise initial drying load.
The modelling and simulation of dynamic experimental drying
processes with cyclic air conditions, using water content gradients
and shrinkage simultaneously, were innovative and represent a
contribution to solar drying research.