In this study a model for the drying process in paper production plants was developed based on the mass and heat balances around drying cycles. Relationships for the heat transfer coefficients between the web and the air as well as between the drying cylinder and the web were extracted from the closed-loop plant operation data. It was found that the heat transfer coefficients could be represented effectively in terms of moisture content, basis weight and reel velocity. The effectiveness of the proposed model was illustrated through numerical simulations. From the comparison with the operation data, the proposed model represents the paper plant being considered with sufficient accuracy.
Karlsson M, "Results from On-Line Investigations of Paper Contact Dyring Process," Drying '80, 322, 1984
Karlsson M, "Papermaking Science and Technology Book 9," Fapet Oy., 55, 2000
Karlsson M, Stenstrom S, Baggerud E, Nordic Pulp Paper Res. J., 17, 66, 2002
Mori Y, Shimizu H, Takao K, Ikari T, Nambu T, "Development of A New Automatic Grade Change System for Paper Machine," Proceedings from Control Systems '2000, Victoria, B.C., Canada, 231, 2000