A flowrate of 1000 ft3/min of air at 70F and 80% moisture is to be processed and fed to a facility with only 10% moisture. Silica gel is used as the absorbent bed (see Fig. P3.5). Part of the initial feed is bypassed dynamically so that the final moisture is controlled. The vessel diameter can be up to 5 ft and the operating time before regeneration must be 3 h.

Assuming isothermal operation, determine the bed diameter and its depth.
The absorption capacity can be seen in the figure.

Transcribed Image Text:

1 0.15m 0.9 0.8 0.7 ys/ye 0.6 0.5 0.4 0.3 0.2 0.1 0.23m 0.30m 0.38m 0.46m 0 10 20 30 40 50 60 70 Ps (atm)-w(lb/ft)