Question: Calculating the air temperature for drying in a fixed bed, a shallow bed of water-saturated granular solids is to be dried by blowing dry air

Calculating the air temperature for drying in a fixed bed, a shallow bed of water-saturated granular solids is to be dried by blowing dry air through it at 1.1atm pressure and a superficial velocity of 15 ft/s. What air temperature is required initially to keep the solids at a surface temperature of 60°F? Neglect radiation.

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