Abstract
It is pointed out that, in drying of a uniform mass of fibers by forced convective air flow through the mass, a "drying front" proceeds through the mass in the same direction as, but much more slowly than, the air flow. Therefore, if uniform drying is to be obtained, the process must continue until the front has emerged from the downstream face of the mass of fibers; air of appropriate relative humidity must be used to leave the fibers at the desired regain; and reversal of air flow direction is undesirable on grounds of efficiency.
Calculations have been made of the capacity of air to remove water from a mass of wool fibers, the mass being left at given values of regain (4, 8, 12, and 16%). It is found that, except for the case of 4% regain, the capacity for water removal depends very little on the initial temperature of the air (in the range 30°-110° C.).
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