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Kinetika sušenja tujerodnih lesnih vrst : diplomsko delo = Drying kinetics of alien wood species : B. Sc. thesisOmovšek, MartinTujerodne drevesne vrste pri nas največkrat najdemo kot parkovna drevesa, večinoma so samostoječa z več gojitvenimi posegi človeka. Les teh dreves se po zgradbi razlikuje, zaradi pogostih poškodovanj ... pa so močno razširjene diskoloracije. Sušenje je pomemben postopek pred nadaljnjo predelavo lesa, zato smo v nalogi proučevali sušilne karakteristike amerikanskega javorja, divjega kostanja in robinije. Tri debeline (22 mm, 28 mm in 46 mm) vsake vrste smo sušili pri treh temperaturah (20 %C, 40 %C in 60 %C) in z gravimetrično metodo spremljali potek sušenja. Iz posameznih sekcij sušilnih krivulj smo določili hitrost sušenja nad točko nasičenja celičnih sten in pod njo, polovične čase sušenja in difuzijske koeficiente. Izvedli smo še končno kontrolo kakovosti (povprečno vlažnost, vlažnostni gradient, zaskorjenje in vizualno oceno). Hitrosti sušenja so bile v prvi fazi med vrstami zelo variabilne, pomembnejše sušenje pod točko nasičenja celičnih sten pa je potrdilo pričakovanja; difuzijski koeficienti so se z naraščajočo temperaturo povečevali in so bili pri gostejši robiniji v večini primerov manjši kot pri amerikanskem javorju in divjem kostanju. Podobne zakonitosti smo ugotovili tudi s polovičnimi časi uravnovešanja, kjer smo potrdili tudi daljše čase sušenja debelejših sortimentov. Kakovost osušenega lesa je bila dobra, opozoriti pa moramo na veliko nevarnost kolapsa pri amerikanskem javorju.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [M. Omovšek], 2020Language - slovenianCOBISS.SI-ID - 29968387
Author
Omovšek, Martin
Other authors
Gorišek, Željko |
Straže, Aleš
Topics
les |
kinetika sušenja |
hitrost sušenja |
difuzivnost |
permeabilnost |
vlažnostni gradient |
wood |
drying kinetics |
drying rate |
diffusion |
permeability |
moisture gradient
Library | Call number – location, accession no. ... | Copy status |
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BF, Dept. of Wood Technology, Lj. | Knjižnica BF za lesarstvo du1 110 IN: 020200069 |
available - reading room |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Omovšek, Martin | |
Gorišek, Željko | 05732 |
Straže, Aleš | 18149 |
Source: Personal bibliographies
and: SICRIS
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