Difuzivnost naravne in toplotno obdelane bukovine : magistrska naloga

Tomec, Primož (author), Gorišek, Željko (mentor), Straže, Aleš (reviewer)

Difuzivnost je najpomembnejša karakteristika lesa, ki določa hitrost dimenzijskih sprememb lesa v nihajočih klimatskih razmerah. Na neobdelani in toplotno predelani bukovini (Fagus sylvatica L.) smo na treh temperaturnih nivojih z nestacionarno metodo in metodo končnih razlik določili koeficiente difuzivnosti v odvisnosti od temeprature. Koeficienti difuzivnosti toplotno obdelanega lesa so nižji od koeficientov neobdelanega lesa, v obeh primerih smo potrdili njihovo naraščanje z naraščajočo temperaturo. Manjšo difuzivnost pripisujemo tudi nižjim vlažnostim toplotno obdelanega lesa. Z naraščajočo vlažnostjo lesa koeficient difuzivnosti narašča hitreje pri neobdelanem lesu kot pri toplotno obdelanem.

• Language: Slovenian
• Keywords: difuzivnost, toplotna obdelava, bukovina
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: P. Tomec
• Year: 2015
• Number of pages: IX, 65 f.
• PID: 20.500.12556/RUL-158690
• UDC: 630*812.141
• COBISS.SI-ID: 2348169
• Publication date in RUL: 19.06.2024

Secondary language

• Language: English
• Title: Diffusivity of natural and heat treated beech wood : M. Sc. thesis

Abstract

Diffusion is the most important characteristic of wood that determines the speed of dimensional changes in varying climatic conditions. Untreated and heat-treated beech wood (Fagus sylvatica L.) was subject to non-stationary method and finite dimensional method by which it was determined at three different temperature levels the diffusion coefficients depending on wood moisture. Heat-treated wood diffusion coefficients are lower than the coefficients of untreated wood; in both cases it was confirmed that the coefficients grow with increasing temperature. Smaller diffusivity is attributed to the lower moisture of heat-treated wood. Increased wood moisture content faster the diffusion coefficient in untreated wood than in heat-treated wood.

• Keywords: diffusivity, heat treatment, beech wood