A direct-heat dryer is to operate with air entering at 250F and 1 atm with a wet-bulb

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A direct-heat dryer is to operate with air entering at 250°F and 1 atm with a wet-bulb temperature of 105°F. Determine from the psychrometric chart and/or relationships of Table 18.3 the following:

(a) Humidity.

(b) Molal humidity.

(c) Percentage humidity.

(d) Relative humidity.

(e) Saturation humidity.

(f) Humid volume.

(g) Humid heat.

(h) Enthalpy.

(i) Adiabatic-saturation temperature.

(j) Mole fraction of water in theair.


Table 18.3 Materials Dried in Direct-heat Rotary Dryers Ammonium nitrate prills Sand Ammonium sulfate Sodium chloride Bl

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