in respect to a given time step, can be
determined.Moisture loss from one grain (mw) appeared
in the convection boundary conditions (Eqs. (27) and
(28)) can be evaluated from Eqs. (29)–(31). The temperature
of the air decreases as it flows throughout the bed;
thus,to calculate the corresponding heat transfer coefficient,
the properties of the air are evaluated at an average
temperature between inlet and exit air. However, the
exit temperature (Ta,o) is not yet known; therefore, in
this step, an iterative solution is necessary