Higher drying air temperature also causes higher the
drying capability. Drying capability of air can be
evaluated from adiabatic evaporation process. The adiabatic evaporation process follows a line of constant
wet-bulb temperature till the intersection with the
saturation curve of = 100%. The difference of humidity
ratio of air between pre drying and saturation (Δω)
shows the drying capability of air. For the experiment
of drying air temperature 70 °C, the difference is
0.01468 kg water kg dry air-1, while for experiment at
60 °C, 50 °C and 40 °C are 0.01221, 0.00992 and
0.00665 kg water kg dry air-1, respectively. This
experiment shows that the higher air drying
temperature causes the drying capability increases and
the vaporization of water from fish surface into the air
faster.