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Energijska učinkovitost sušilnega postopka v različnih tehnologijah predelave žaganega lesa : diplomsko delo - visokošolski strokovni študij
Obronek, Franc (Author), Gorišek, Željko (Mentor) More about this mentor... This link opens in a new window, Gornik Bučar, Dominika (Reviewer)

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Abstract
Pri 3 načinih predelave (A - tehnično sušenje svežega žaganega lesa do ciljne vlažnosti 8 %; B - sušenje svežega žaganega lesa na prostem do območja nasičenja vlaken in tehnično dosuševanje elementov do ciljne vlažnosti; C - razžagovanje svežega žaganega lesa v elemente in tehnično sušenje elementov dokončne vlažnosti) in nadaljnjim sušenjem žaganega lesa smo primerjali čase sušenja, vso porabo energije, specifično porabo energije, toplotno učinkovitost in energijsko vrednost lesnih ostankov. Izračune smo izvedli z računalniškim programom, ki je omogočal variiranje vhodnih parametrov in proučevanje njihovega vpliva na analizirane vrednosti. Najvišjo toplotno učinkovitost, najkrajše čase sušenja in najmanjšo kapaciteto sušilnih komor dosežemo pri razžagvanju svežega žaganega lesa v elemente (C), vendar pa je tveganje večje, kalorična vrednost ostankov pa nižja. Energijsko najpotratnejše je sušenje žaganega lesa (A), zahteva pa tudi največje kapacitete sušilnih komor. Z izvajanjem predsušenja na prostem podaljšamo čas sušenja, bistveno pa se zmanjša vsa poraba energije in potrebne kapacitete komor. S pravilno izbiro tehnologije predelave lesa in sušenja pridobimo oziroma prihranimo energijo (razmerje med porabljeno in pridobljeno energijo je 1 : 7,12).

Language:Slovenian
Keywords:bukovina, žagan les, sušenje lesa, trajanje sušenja, poraba energije
Work type:Undergraduate thesis (m5)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2010
Publisher:[F. Obronek]
Number of pages:IX, 48 f.
Place:Ljubljana
UDC:630*847.275
COBISS.SI-ID:1796233 Link is opened in a new window
Views:774
Downloads:212
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Secondary language

Language:English
Title:Energy efficiency of drying with different sawmill technologies : graduation thesis - higher professional studies
Abstract:
Among 3 different methods of sawmill processing and drying of wood (A - technical drying of fresh sawn timber to the target moisture content of 8 %, B- drying of fresh sawn wood in the open area to the fibre saturation and technical drying elements to target moisture content; C - cutting fresh sawn timber elements and technical elements to the final drying moisture content), the drying times, total energy consumption, specific energy consumption, energy efficiency and energy value of wood residues were compared. Using a new computer programme the influence of different outside parametres on examined values was analyzed. Cutting fresh sawn timber into elements (C), the maximum thermal efficiency, the shortest drying times and the minimum capacity of drying chambers are achieved, but the higher risk and lower calorific value of residue. Most energy consumed in drying of sawn wood (A) also requires the maximum capacity of drying chambers. Implementing drying outdoor extends drying time, substantially reduces total energy consumption and necessary capacity chambers. Selecting proper technology, wood processing and drying, we obtained substantial energy savings (relation between consumed and produced energy is 1 : 7,12).

Keywords:beechwood, sawn wood, wood drying, drying time, energy consumption

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