A laboratory-scale hot air dryer used in the present study is
schematically shown in Fig. 1 (Luangmalawat et al., 2008). The
dryer consists of a drying chamber with dimensions of 0.52
0.52 0.52 m and was insulated with glass wool; the dryer can
be operated both with and without auxiliary far-infrared heater,
which was not used in this study.