SOME PHYSICAL FEATURES OF CONDUCTIVE HEATING AND DRYING OF WOOD

Ye.P. Khunynets, O.O. Shepelyuk, I.R. Shepelyuk

Abstract


Some physical features of conductive heating and drying of wood are studied. All the elementary kinds of heat transfer such as heat conductivity, convection, thermal radiation occur during heating of wood. The methods of heating of wood are described; the most suitable methods for various kinds of timber are determined. Physical basis of conductive heating and drying of wood are proposed. The influence of heating surface temperature on the heating process dynamics and kinetics of the drying process is identified. It is researched that early conductive heating of wood heat in the material is transferred by heat conductivity, and further the bulk of the heat flow is transmitted by vapor stream, which enthalpy is larger than the enthalpy of liquid. The influence of the force of pressing the heating surface to the material and material thickness on the intensity of conductive heating and drying is investigated.

Keywords


wood; convection; vaporization; evaporation; temperature; enthalpy; temperature gradient; heat treatment; drying

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