The dynamics of moisture transfer in pine and beech wood in normal and low pressure conditions

• Autorzy: Dobrowolska, E. , Karwat, Z. , Mielnik, A.
• Języki publikacji: EN

Abstrakty

EN

This work studies the dynamics of moisture transfer during drying of elements made of pine sapwood and beech of various moisture contents at normal 0,10 MPa and low 0,03 MPa pressure, taking into account the anatomical cross sections. The analysis of the speed of moisture contents equalizing shows that much greater dynamics of moisture contents change take place in case of drying in 0,03 MPa than 0,10 MPa pressure, regardless of wood species or anatomical cross sections of samples. It is drying in vacuum that seems to be when moisture is given off by wood. Low moisture of the middle layers, compared with the outer layers, is difficult to equalize during drying. Also over drying of the outer layer of wood limits stable dynamics of moisture transfer, both during drying in normal pressure and in the vacuum.

Słowa kluczowe

EN

drying; vacuum drying; distribution of moisture in wood; pine; birch

• Czasopismo: Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
• Rocznik: 2018
• Tom: No. 104
• Strony: 130--138
• Opis fizyczny: Bibliogr. 11 poz.

Twórcy

autor

Dobrowolska, E.

• Warsaw University of Life Science – SGGW, Faculty of Wood Technology

autor

Karwat, Z.

• Warsaw University of Life Science – SGGW, Department of Wood Science and Wood Protection

autor

Mielnik, A.

• Warsaw University of Life Science – SGGW, Faculty of Wood Technology

Bibliografia

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• 3. SIMPSON W. T. 1987: Vacuum drying northern red oak. Forest Products Journal 37(1) p. 35-38.
• 4. CHEN ZHANGJING, 1997: Primary Driving Force in Wood Vacuum Drying. Dissertation. Virginia Polytechnic Institute and State University, Blacksburg, Virginia 1997.
• 5. SONDEREGGER W.,VECELLIO M., ZWICKER P., NIEMZ P., 2011: Combined bound water and water vapour diffusion of Norway spruce and European beech in and between the principal anatomical directions. European Journal of Wood and Wood Products. 65(6), p. 819 – 828.
• 6. VANEK M., TEISCHINGER A. 1989: Diffusionskoeffizienten und Diffusionswiderstandszahlen von verschiedenen Holzarten. Holzforschung und Holzverwertung, 41(1), p. 3 – 6.
• 7. VORREITER L., 1949: Holztechnologisches Handbuch. Band 1: Allgemeines, Holzkunde, Holzschutz und Holzvergütung, Wien: Fromme.
• 8. SIAU J. F., 1995: Transport processes in wood. Berlin, Springer.
• 9. DOBROWOLSKA E., DOMAŃSKI M., OSIPIUK J., STECZOWICZ M. 2008: Wybrane zagadnienia suszenia tarcicy. Wydawnictwo SGGW, Warszawa.
• 10. KRZYSIK F., 1974: Nauka o drewnie. PWN, Warszawa.
• 11. OLEK W., 2007: Modelowanie zagadnień odwrotnych procesu dyfuzji wody związanej w drewnie. Wydawnictwo Akademii Rolniczej im. Augusta Cieszkowskiego, Poznań.

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).