Modelling of the energy consumption needed for defrosting of the wood chips / Nenčo S. Delijski ... [et all.]. -- obr. -- Lit. - A mathematical model for the calculation of the specific mass energy consumption, which is needed for defrosting of frozen wood chips above the hydroscopic range, qdfr (in kWh·t-1), have been suggested. Equations for easy calculation of qdfr and its components have been derived, depending on the initial temperature of the frozen chips, T0, on the wood moisture content, u, and on the fiber saturation points of the wood species at 20 oC and at –2 oC (i.e. at 293.15 K and at 271.15 K). For the calculation of the qdfr according to the suggested model a software program has been prepared in MS Excel 2010. With the help of the program, calculations have been carried out for the determination of the energy consumption qdfr and of its components, which is needed for defrosting of oak, acacia, beech, and poplar frozen chips with an initial temperature in the range from t0 = –40 oC to t0 = –2 oC and with moisture content in the range from 40 % to 100 %. The obtained results can be used for a science-based determination of the energy consumption for defrosting of the wood chips in the production of cellulose, briquettes, pellets or particle boards. They are also of specific importance for the optimization of the technology and of the model-based automatic control of the chips’ defrosting process.

In Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Zvolen : Technická univerzita vo Zvolene, 2017. -- ISSN 1336-3824. -- Roč. 59, č. 1 (2017), s. 75-84

I. Delijski, Nenčo S., 1945-
II. Geffert, Anton, 1955-
III. Geffertová, Jarmila, 1956-
IV. Dzurenda, Ladislav, 1955-
V. Brezin, Veselin
VI. Tumbarkova, Natalia
VII. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Roč. 59, č. 1 (2017), s. 75-84

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