Dynamic Model of the Process of Contact and Convective Paper Drying
نویسندگان
چکیده
Dynamic model of continual process of contact and convective paper drying is recommended, as well as numerical procedure for its solution. Mathematical basis of the model suggested is partial differential equation of unsteady heat transfer by conduction, in direction perpendicular to paper surface. The equation has been solved with reference to two boundary conditions, one for each side of paper web, by finite difference method with iterative improvement (method predictor-corrector). As model fitting parameters contact coefficient and effective thermal conductivity are used. These parameters had been changed until the best agreement was achieved among calculated and observed moisture contents and paper web surface temperatures. The model has been validated by comparing fitting parameters obtained with those from literature, as well as calculated values of heat consumed and moisture removed to corresponding quantities observed in the real industrial process.
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