Vychislenie kozfficienga temperaturoprovodnosti merzlojj drevesiny topolja vo vremja ee ottaivanija

• Autorzy: Deliiski N. , Brezin F. , Dzurenda L. , Sokolovski S.

Warianty tytułu

PL

Obliczanie przewodności cieplnej zamarzniętego drewna topoli podczas rozmrażania

• Języki publikacji: RU

Abstrakty

EN

Calculation of the temperature conductivity of frozen poplar wood during its defrosting. An approach for the computation of the wood temperature conductivity a during defrosting of the wood has been suggested. The approach takes into account the physics of the process of thawing of the ice, which is created in the wood by both the hygroscopically bounded and the free water. It reflects for the first time also the influence of the fiber saturation point of wood species on the value of their a during wood defrosting and the influence of the temperature on the fiber saturation point of frozen and non-frozen wood. For the computation of a according to the suggested approach a software program has been prepared in FORTRAN, which has been input in the developed by Microsoft calculation environment of Visual Fortran Professional. With the help of the program computations have been made for the determination of a of often used in the veneer and plywood production poplar wood with moisture content 0.2 ≤ u ≤ 1.2 kg.kg-1 at the temperature range between -2oC and -60oC during defrosting of the wood.

PL

Obliczenie przewodności cieplnej zamarzniętego drewna topoli podczas rozmrażania. Artykuł opisuje sposób obliczania przewodności cieplnej zamarzniętego drewna topoli. Wzięto pod uwagę własności fizyczne rozmarzającego lodu, zarówno wolnego jak i higroskopijnie związanego z drewnem. Po raz pierwszy wzięto pod uwagę także punkt nasycenia włókien podczas rozmrażania, oraz wpływ temperatury na wartość tego punktu w zamarzniętym i rozmrożonym drewnie.

Słowa kluczowe

EN

poplar wood; defrosting; thermal conductivity; free water; bound water; fibre saturation point; temperature influence

• Wydawca: -
• Czasopismo: Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
• Rocznik: 2012
• Tom: 77
• Opis fizyczny: p.160-165,fig.,ref.

Twórcy

autor

Deliiski N.

• Faculty of Forest Industry, University of Forestry, Kliment Ohridski Bd. 10, 1756 Sofia, Bulgaria

autor

Brezin F.

• Faculty of Forest Industry, University of Forestry, Kliment Ohridski Bd. 10, 1756 Sofia, Bulgaria

autor

Dzurenda L.

• Faculty of Wood Technology, Technical University in Zwolen, T.G.Masaryka 24, 96-053 Zwolen, Slovakia

autor

Sokolovski S.

• Faculty of Forest Industry, University of Forestry, Kliment Ohridski Bd. 10, 1756 Sofia, Bulgaria

Bibliografia

• 1. ДЕЛИЙСКИ, Н., 2003: Моделиране и технологии за пропарване на дървени материали в автоклави. Дисертация за д.т.н., ЛТУ, С., 358 c.
• 2. ДЕЛИЙСКИ, Н., Л.ДЗУРЕНДА, С.СОКОЛОВСКИ 2010:Компьютерное вычисление коэффициента температуропроводности мерзлой древесины. Annals of Warsaw University of Life Sciences – SGGW, Forestry and Wood Technology, No 71, с.101-105.
• 3. ЧУДИНОВ, Б. С. 1968: Теория тепловой обработки древесины. М., Наука; 255 c.
• 4. DELIISKI, N. 1990: Mathematische Beschreibung der spezifischen Wärmekapazität des aufgetauten und gefrorenen Holzes. VIII International Symposium ‘’Fundamental Research of Wood’’, Warszawa; 229-233.
• 5. DELIYSKI, N. 1994: Mathematical description of the thermal conductivity coefficient of defrozen and frozen wood. 2nd Internationаl Symposium “Wood Structure and Properties ‘94” Zvolen; 127-133.
• 6. DZURENDA, L., N. DELIISKI, 2010: Tepelné procesy v technológiáh spracovania dreva. Vysokoškolska učebnica, TU-Zvolen; 266 s.
• 7. SIAU, J. F., 1984: Transport processes in wood, Springer-Verlag, NewYork