Please Help..........!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! (Sizing

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Please Help..........!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

(Sizing of a rotary dryer) A moist non-hygroscopic granular solid at 26 degree C is to be dried from 20% initial moisture to 0.3% final moisture (wet basis) in a rotary dryer at a rate of 1500 kg/h. Hot air enters at 135 degree C with a humidity of 0.015. The exit solid temperature must not exceed 110 degree C and the air velocity must not exceed 1.5 m/s in order to avoid dusting of the solid. Specific heat of the dry solid is c ps = 0.85 kJ/kg K. Suggest the diameter, the length and the other parameters of the dryer.

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