Delijski, Nenčo S., 1945- An approach and an algorithm for computation of the unsteady icing degrees of logs subjected to freezing / Nenčo S. Delijski, Natalia Tumbarkova. -- Obr. -- Lit. - An approach and an algorith m for the computation of three types of unsteady icing degrees of logs during their cooling until reaching of temperatures, at which the freezing of the free water, and after that the freezing of the bound water in them occurs, ha ve been suggested in the pre sent paper. The approach and the algorithm are based on the use of numerical solutions of own 2D non - stationary mathematical model of the logs’ freezing process . The equations, which realise the suggested algorithm , are introduced in this model. Using the se equations, the current values of the following types of unsteady icing degrees of subjected to freezing logs above the hygroscopic range are computed: icing degree, which is caused only by the freezing of free water; icing degree, which is caused only b y the freezing of bound water; and total icing degree, which takes into account and mix es the current values of the first two types of the icing degree. For the solution and verification of the model and for the calculation of the logs’ icing degrees according to the suggested approach and algorithm , a software program has been prepared in Visual Fortran Professional. With the help of the program calculations have been carried out for the determination of the unste ady icing degrees of poplar logs duri ng their 50 h freezing at – 30 o C. The information about the logs’ icing degree s is needed for the computation of the energy consumption of the freezing and also of the subseq uent defrosting processes of logs aimed at their plasticizing in the production of veneer.

In Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Zvolen : Technická univerzita vo Zvolene, 2017. -- ISSN 1336-3824. -- Roč. 59, č. 2 (2017), s. 91-104

I. Tumbarkova, Natalia
II. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Roč. 59, č. 2 (2017), s. 91-104

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