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Primerjava sušilnih lastnosti različnih kategorij bukovine : diplomsko delo (visokošolski strokovni študij) = Comparison of drying properties of sapwood and discoloured wood in European beech : graduation thesis (higher professional studies)Osterman, AlešMehanske poškodbe bukovine (Fagus sylvatica L.) povzročijo izsušitev sredice, ki preide v diskoloracijo (rdeče srce). Zaradi sekundarnih sprememb v takšnem lesu se spremenijo tudi sušilne lastnosti, ... ki se izražajo predvsem s permeabilnostjo in difuzivnostjo tkiva. S konvekcijskim sušenjem svežih radialno orientiranih bukovih elementov beljave in rdečega srca smo določili sušilno krivuljo in sušilni diagram. Sušenje je potekalo pri konstantnih pogojih (T=20 °C, vlažnost=33 %, v=0,5m/s) do ravnovesnega stanja. S plinsko permeabilnostjo v radialni, tangencialni in vzdolžni smeri smo ovrednotili sposobnost prevajanja; difuzivnost in polovični čas uravnovešanja pa določili nestacionarno za proces adsorpcije pri uravnovešanju med 33 % in 87 % relativno vlažnostjo (T=20 °C). Hitrejše sušenje iz svežega stanja do vlažnosti nasičenja vlaken smo dosegli pri beljavnih vzorcih, v higroskopskem območju pa se je njihova sušilna hitrost izenačila z diskoloriranim lesom. Rezultati potrjujejo le značilne razlike vzdolžne plinske pereabilnosti obeh kategorij lesa. Radialni difuzivnosti beljave in rdečega bora se značilno ne razlikujeta, kar je v skladu s primerljivimi gostotami obeh kategorij. Priporočamo ločeno izvedbo sušenja obeh kategorij bukovine.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [A. Osterman], 2005Language - slovenianCOBISS.SI-ID - 1319049
Author
Osterman, Aleš
Other authors
Gorišek, Željko |
Torelli, Niko
Topics
sušenje lesa |
difuzivnost |
permeabilnost |
lesna vlažnost |
Fagus sylvatica L.
Library | Call number – location, accession no. ... | Copy status |
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BF, Dept. of Wood Technology, Lj. | Knjižnica BF za lesarstvo vsn 114 IN: 020050092 |
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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Osterman, Aleš | |
Gorišek, Željko | 05732 |
Torelli, Niko | 01641 |
Source: Personal bibliographies
and: SICRIS
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