Question: A moisture to a final product containing 5% moisture. Āir at 80 degrees Celsius and 100 kPa with a molal humidity of 0.012 kmol H20/kmoī dry air is used as drying medium. It goes out of the...

Extracted text: Question: A moisture to a final product containing 5% moisture. Āir at 80 degrees Celsius and 100 kPa with a molal humidity of 0.012 kmol H20/kmoī dry air is used as drying medium. It goes out of the drier at 40 degrees Celsius and 750 mmHg with a humidity of 0.065 kmol H20/kg dry air. If the water evaporated in the drier is 30 kg/min, drier is processing a solid containing 30% by weight Calculate: A) the kg of product per minute B) the volume of the outgoing air in m3 /min


Extracted text: Question: A dryer is used to process 2000 kg/h of a material containing 40% moisture to a final consists of an air heater and a drying chamber. To save energy in air heating, part of the exhaust air is recycled, mixed with fresh air, and the resulting mixture is heated before feeding to the chamber. 30,000 m^3 of fresh air per hour at 30 degrees Celsius dry bulb temperature and 65% RH are used. This is mixed with the recycled air and heated to 100 degrees C dry bulb temperature and 42 degrees Celsius wet bulb temperature. The exhaust air is at 60 degrees Celsius. product containing 5% moisture. The dryer Calculate: A) the molal and absolute humidity of the exhaust air B) the fraction of the exhaust air that is recycled