Ozarkiv I. Scientific and technical principles of convective-radiation drying of timber

Object - mechanism of convective-radiative wood drying. Aim - development of scientific and technical bases of convective-radiative wood drying by complex approach with respect to optical properties of wood and its heat-mass interchange characteristics besides economic effectiveness of operating drying chambers. Novelty - the mathematical models, allowing improve of heat-mass processes in capillary-porous colloid bodies have been worked out; theoretical backgrounds of optical diagnostics adaptation with reference to control and prognostication of following wood state in drying process have been established; criterial and engineering methods of duration of thin timber and leaf materials drying have been recommended for the first time; complex approach relatively to developing and systematization of scientific and technical bases of convective-radiation wood drying have been offered, that allowed development the technical decisions, which ensure alternative thermal energy sources (sun radiation) involving into system of energy and resources saving and for rational constructions of sun dryers designing have been recommended; methods of heat and moisture exchange, moisture interchange, critical moisture content and "blackness" degree of wood have been justified; the modes of geliodrying and modes of veneer drying in nozzle belt convective-radiation dryer have been worked out; theoretical methods of engineering computations for existing and designing dryers have been developed. The results - construction of sun drying chambers, method and installation for distance control of strained wood and wooden leaf materials in drying process, drying modes have been worked out. At three enterprises of woodworking industry have been introduced.