Question

Trays are used to dry 1000 lbs/h of solid (dry basis) from X=0.5 to 0.001 lb moisture/lb dry solid. The drying period is all in the constant rate regime. Calculate R_cA. Hot air enters the tunnel at tunnel (with trays on the floor) at a humidity of 0.03 lb/lb and 200^oF and leaves at 0.049 lb/lb and 110^oF. Calculate air flow rate m. If the temperature of the wet solid remains a constant at 105^oF, sketch temperature variations in air and solids from one end of the tunnel to another, sketch also these on the humidity chart. Calculate LMTD. If h_y is .01m^0.8 Btu/(h^oFft²), calculate A.

Answer 1

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