A TOWER-TYPE MOISTURE DRYER IS TO DELIVER 1000 KG/HR OF CASSAVA FLOUR WITH 2% RESIDUAL MOISTURE OF 20% IN THE FEED. THE

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A TOWER-TYPE MOISTURE DRYER IS TO DELIVER 1000 KG/HR OF CASSAVA
FLOUR WITH 2% RESIDUAL MOISTURE OF 20% IN THE FEED. THE AIR TO BE
HEATED IN THE HEATING CHAMBER IS A MIXTURE OF FRESH AIR AT 33°C DB
AND 60% RH, AND HOT HUMID AIR FROM DRYER AT 49°C DB AND 60% RH. THE
MIXTURE AIR AT 38°C DB AND 65% RH IS HEATED BY A STEAM COIL TO
93°C. THE DRYER IS PROPERLY INSULATED SO THAT THE MOISTURE
ABSORPTION CAN BE CONSIDERED ADIABATIC. COMPUTE: a. REQUIRED FLOW
OF HEATED AIR MIXTURE TO DRYER, b. CAPACITY OF FORCED DRAFT FAN ON
DRYER, c. HEAT IN KCAL/HR FOR HEATING THE AIR MIXTURE IN THE
HEATING CHAMBER, AND d. PERCENTAGE BY WEIGHT OF FRESH AIR IN THE
MIXTURE