1.      Air is available at 70°F and humidity of 0.001lb/lb.  It is to be treated to yield 130°F and 70% humidity.  Offer a reasonable design.

2.      A mix of granular ceramic material is to be dried in a rotary drier from X = 0.5 to 0.001 lb/lb where the solid is fed at 1000 lb/h dry basis and inlet temperature of 70°F.  Hot and dry air at 200°F and 0.03 lb/lb humidity is available.  The wet solid can be assumed to be at a constant drying regime.  If U = 0.01m^0.8  Btu/(hft²°F), calculate this constant drying rate.  Calculate the area of transport.