Empirical Equations for Estimating Drying Times of Thick Rotary-Cut Veneer in Press and Jet Dryers

摘要

This paper describes the use of empirical equations for the analytical correlation of the drying variables-time, temperature, green thickness, and moisture content-for drying southern pine and Douglas-fir thick-cut veneers in two dryer types. The author describes a method of fitting veneer drying data to an empirical equation of a form applicable to both jet and press drying for veneers 1/8 to 1/2 inch thick across a wide range of temperatures. With drying rate data represented by an empirical equation, it is possible to interpolate drying times with some certainty and to extrapolate beyond experimental observations for a limited range. If the basic form of the equations developed in this paper are found to be applicable to other species, the amount of experimentation necessary to characterize a given dryer/species system would be reduced, making cost analysis more efficient. Additional keywords: Tables(data), Charts, and Experimental data.