Rejected heat at the evaporator was calculated from Eq. (2), Eqs.
(18)–(19) and Eq. (22). It was found that the rejected heat at the
evaporator was the major output in the drying medium because the
evaporator is the main apparatus used to dehumidify the drying
medium. Air had less rejected heat at the evaporator than nitrogen
drying as shown in Table 2. There was less rejected heat for air
drying because the evaporator’s outlet temperatures were higher,
which lead to a lower temperature difference than for nitrogen, as
shown in Fig. 4.