Computing the 2D temperature field in non-frozen logs at changing atmospheric temperature and during their subsequent autoclave steaming / Nenčo S. Delijski ... [et al.]. -- Graf., obr. -- Lit. - An approach for mathematical modelling and research into the 2D non-stationary temperature distribution in logs under an influence of periodically changing atmospheric temperature near them and during their subsequent steaming in autoclavesis described in the paper. Mathematical descriptions of the periodically changing atmospheric temperature and also of the temperature of the steaming medium in the autoclaves and of the conditioning air medium isintroduced as boundary conditions in our own 2D non-linear mathematical model of the 2Dtemperature distribution in non-frozen logs during their heating and cooling. Numerical solutions of the model in calculation environment of Visual FORTRAN Professional are given as an application of the suggested approach. The results from a simulative investigation into2D non-stationary temperature distribution in non-frozen beech (Fagus sylvatica L.) logs during their 5 day and night heating and cooling at sinusoidal change of the air temperature with different initial values above 0 °C and different amplitudes, and also during steaming of the logs in autoclave and their subsequent conditioning are graphically presented and analysed.The obtained results can be used for development of energy saving steaming regimes with an optimal duration depending on the precise determiningthe initial temperature of the logs of each batch subjected to thermal treatment. They can be used also for the creation of a system for optimized model predictive automatic control of the steaming process of logs.

In Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Zvolen : Technická univerzita vo Zvolene, 2020. -- ISSN 1336-3824. -- Vol. 62, no. 2 (2020), s. 47-59

I. Delijski, Nenčo S., 1945-
II. Dzurenda, Ladislav, 1955-
III. Trichkov, Neno
IV. Tumbarkova, Natalia
V. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Vol. 62, no. 2 (2020), s. 47-59

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