Rookie attempting to model an existing rotary dryer. Given the input and output conditions of air and solids, there is a large excess of heat going "somewhere." I can't explain it with losses to the outside of the drum (insulated).
Heat gained by the solids includes sensible heat plus heat of evaporation.
Heat lost by the airflow includes sensible heat.
What am I missing? The only thing I can think of is a miscalculation of airflow. Given that I calculated it based on anemometer readings, avg vel x area = volumetric flow rate. Multiply that by density = mass flow rate.
I also cannot discout air mixing, as the solid feed slot is open to the atmosphere...
Heat gained by the solids includes sensible heat plus heat of evaporation.
Heat lost by the airflow includes sensible heat.
What am I missing? The only thing I can think of is a miscalculation of airflow. Given that I calculated it based on anemometer readings, avg vel x area = volumetric flow rate. Multiply that by density = mass flow rate.
I also cannot discout air mixing, as the solid feed slot is open to the atmosphere...
