Ugotavljanje vlažnosti lesa pri izdelavi peletov : diplomsko delo - visokošolski strokovni študij - 1. stopnja

Sanabor, Dejan (author), Marenče, Jurij (mentor)

Vsebnost vode predstavlja pomembno lastnost lesa pri njegovi uporabi. Pri tem je pomembna ne samo količina vode v lesu, ampak tudi njena spremenljivost tekom celotnega leta. Namen diplomske naloge je bil ugotoviti, kako se vsebnost vode pri sekancih ter žagovini spreminja preko leta oziroma po posameznih letnih časih. S takšnimi informacijami lahko prispevamo k bolj realnemu načinu plačilu in sicer po atro teži - ta predstavlja absolutno suh les. Vsebnost vode v svežih sekancih in žagovini so merili z vlagomerom DFO-80, maso vzorcev pa z digitalno tehtnico AND EK - 6000i. Raziskave so potekale preko celega leta. Skupno število vzorcev je bilo 527. Podjetje, kjer so potekale raziskave, izdeluje pelete izključno iz iglavcev - ti so bili v raziskavi ločeni glede na drevesno vrsto (smreka, jelka, bor). Največja vsebnost vode je bila ugotovljena pri boru, medtem, ko med smreko in jelko ni bistvenih razlik. Žagovina je iz mešanih drevesnih vrst, rezultati pa kažejo, da se vsebnost vode ne spreminja tako izrazito kot pri sekancih in je pri tem tudi nižja tako skozi mesece kot tudi skozi celotno leto.

• Language: Slovenian
• Keywords: les, vsebnost vode, sekanci, peleti, lesna biomasa
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [D. Sanabor]
• Year: 2012
• Number of pages: VIII, 34 str.
• PID: 20.500.12556/RUL-16161
• UDC: 630*8
• COBISS.SI-ID: 3532966
• Publication date in RUL: 11.07.2014

Secondary language

• Language: Unknown

Abstract

Water content is an important feature of wood in its use. The quantity of water in timber and its variability throughout the year is very important. The purpose of this work was to determine how the content of the water in wood chips and sawdust changes over months and seasons. The results should contribute to a more real way of payment under ATRO weight, which represents the absolute dry wood. The water content of fresh wood chips and sawdust was measured by hygrometer DFO-80; the mass of samples was measured with digital scale AND EK-6000i. Research was conducted throughout the year. Total number of samples was 527. Company, where the research took place, produces pellets exclusively of conifers, so the chips were separated by tree species: spruce, fir and pine. The highest water content was in pine chips, while between spruce and fir chips are no significant differences. Sawdust contains different tree species. Results showed that the water content does not change as significantly as water content in wood chips and is slightly lower through out the month as well as throughout the year.