APPLYING THE SOFTWARE PACKAGE TABLE CURVE 2D FOR COMPUTATION OF PROCESSING AIR MEDIUM TEMPERATURE DURING FREEZING IN A FREEZER AND DEFROSRING OF LOGS

Abstract

A mathematical description of the change in the processing air medium temperature T_m during freezing in a freezer and subsequent defrosting of logs using a software package Table Curve 2D v.5.01 has been suggested. This package allows for the selection of equations, which provides the best similarity between the calculated with them values of T_m during the log’s freezing and defrosting processes and the respective experimentally established data for T_m. The values of the coefficients in the selected equations have been determined in the work for the cases of decreasing in T_m in the range from about 20 ^оС to about –30 ^оС during separately 30 h freezing and of the following increasing in T_m up to about 20 ^oC during the subsequent 30 h or 50 h defrosting of 6 pine logs with diameter of 240 mm and length of 480 mm.