Calculation of heat and mass transfer of tobacco on band coolers

The heat and mass transfer from moist tobacco on a band cooler was mathemat ically examined. The fibrous tobacco particles are 10 to 20 mm long and cut to about 1 mm width, with a leaf thickness of approx. 0.1 mm. The tobacco is loosely heaped on a band and cooled after the drying process. The coolin g is carried out by cross flow operation with ambient air. Furthermore toba cco is subjected to moisture loss in the course of cooling. The mass transf er is affected upon the initial conditions as well as the considered drying mechanism (first and second drying period). The cooling process on the ban d cooler is calculated by applying a two dimensional stationary cross flow model as shown.