Date of Award


Degree Name

Bachelor of Science


Paper Science and Engineering


This experiment estimated dryer heat transfer coefficients by varying the running conditions of a pilot dryer. Tests were performed varying the speed, condensing rate, and blowthru, and correlating these changes to the film thickness and then to the overall heat transfer coefficient. One syphon configuration was used, and all other variables were held constant in order to focus on the three key conditions.

The findings from this study indicate that: (a) the film thickness decreases as the blowthru is increased, (b) the film thickness increases as the condensing rate is increased (at constant speeds), (c) the heat transfer coefficient decreases as the speed is increased, and (d) speed affects the heat transfer coefficient more than the film thickness.