20.500.12556/RUL-128617 Thermal conductivity of different bio-based insulation materials Toplotna prevodnost različnih bio-izolacijskih materialov To achieve the zero-waste goal as well as sustainability, the use of the raw materials, especially those from nature, and wood in particular, has to be smart, meaning that the resource has to be used to its full potential. Since wood-based industry is associated with high intensity and the generation of a relatively large amount of residues, those residues should be used for the production of useful products, otherwise they will easily be classified as waste and afterwards used as a source of energy. To present a possible solution for wood residues like wood chips, wood particles and bark, we investigated the possibility of using wood and bark residues as constituents for the production of single layer insulation panel with a target thickness of 40 mm and target density of 0.2 g·cm-3. Thermal conductivity was determined using the steady state principle at three different temperature settings. The average thermal conductivities were determined between 49 mW·m-1·K-1 and 74 mW·m-1·K-1. The highest values were determined at boards made from bark, which also had the highest density (0,291 g·cm-3), while the lowest thermal conductivity was observed for boards made from spruce wood particles. Doseganje cilja "nič odpadkov" in načela trajnostne rabe je kompleksen proces, ki zahteva učinkovito rabo surovine, še posebej naravne, zlasti lesa. Pomembno je, da je raba surovine celostna, da se uporabi v celoti za izdelavo trajnostnih produktov. Lesnopredelovalna industrija je visoko intenzivna proizvodnja, kar pomeni, da pri tem nastanejo tudi velike količine ostankov, primernih za izdelavo uporabnih proizvodov. V primeru, ko ostankov ne bi smotrno uporabili, pa se to surovino opredeli kot odpadek in uporabi za proizvodnjo energije (kar pa ni najbolj trajnostna in tudi optimalna rešitev). S ciljem predstavitve možne uporabe lesnih ostankov, kot so npr. sekanci, iveri in skorja, smo raziskali možnost njihove uporabe za izdelavo enoslojnih izolacijskih plošč ciljne debeline 40 mm in gostote 0.2 g·cm-3. Toplotno prevodnost smo določili pri treh različnih temperaturnih pogojih. Ugotovljene vrednosti povprečne toplotne prevodnosti so bile med 49 mW·m-1·K-1 in 74 mW·m-1·K-1. Najvišje vrednosti so bile izmerjene pri ploščah iz skorjete so imele tudi najvišjo gostoto (0.291 g·cm-3), najnižje pa so izmerili na ploščah iz smrekovih iveri. thermal conductivity insulation wood particles particleboard bark les toplotna prevodnost izolativnost sekanci iveri skorja true false true Angleški jezik Slovenski jezik Članek v reviji 2021-07-21 08:57:06 2021-07-21 08:57:06 2024-04-03 12:48:16 0000-00-00 00:00:00 2021 0 0 Str. 73-82 št. 1 Let. 70 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*862:630*812.14 0024-1067 10.26614/les-wood.2021.v70n01a05 70855427 RAZ_Medved_Sergej_2021.pdf RAZ_Medved_Sergej_2021.pdf 1 3ABC44CB69730A07114DBCE70C04F99F 5d1ccaabb2a5c7c4d25a230c39a688cfa71c35b9d08cddc99d48ed4bce80ce33 310c8b50-e9f1-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145407 https://journals.uni-lj.si/les-wood/article/view/12100 0 b41367b8-e9f0-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145406 Biotehniška fakulteta Les 0 0 0