Vpliv načina shranjevanja gozdnih sekancev na njihovo vlažnost : diplomsko delo - visokošolski strokovni študij

Rosc, Janez (avtor), Košir, Boštjan (mentor), Krajnc, Nike (komentor)

Uporaba ter poraba lesne biomase se v zadnjih desetletjih povečuje. S tem se pojavlja potreba po izboljšanju trga lesne biomase - od pridobivanja do sušenja in skladiščenja. Raziskava v pričujoči nalogi temelji na področju sušenja lesnih sekancev. Za poskus je bil uporabljen svež okrogel les bukve, od katerega je bil del zmlet v lesne sekance (4 zaboji), preostanek pa zložen na skladišču, kjer je bila merjena njegova vlažnost. Trije zaboji so bili postavljeni zunaj; prvi nepokrit, drug pokrit s paroprepustno folijo, tretji sPVC folijo, četrti, spet nepokrit, pa je bil lociran v zaprtem zračnem prostoru. Okrogel les so na koncu približno štirimesečnega sušenja zmleli, da so lahko primerjali vlažnost sekancev. Med trajanjem poskusa je bila temperatura v zalogovnikih merjena z merilcem temperature iButton DS1923, vlaga sekancev z napravo za merjenje vlage FMG 3000, vlaga okroglega lesa pa z nabijalno sondo Testo hygrotest 6500. Rezultati kažejo, da so bili najbolj suhi sekanci v zaprtem prostoru, najbolj vlažni pa nepokriti na prostem. Okrogel les je bil le v dveh primerjavah s sekanci v zalogovnikih bolj suh. Po predvidevanjih je glavni razlog za tak rezultat dejstvo, da skladovnica okroglega lesa ni bila pokrita, in da je bilo v času izvajanja poskusa izrazito veliko padavin.

• Jezik: Slovenski jezik
• Ključne besede: lesna biomasa, lesni sekanci, sušenje sekancev, sušenje okroglega lesa, vremenske razmere
• Vrsta gradiva: Diplomsko delo
• Tipologija: 2.11 - Diplomsko delo
• Organizacija: BF - Biotehniška fakulteta
• Kraj izida: Ljubljana
• Založnik: [J. Rosc]
• Leto izida: 2012
• Št. strani: IX, 45 str.
• PID: 20.500.12556/RUL-16060
• UDK: 630*83
• COBISS.SI-ID: 3346854
• Datum objave v RUL: 11.07.2014

Sekundarni jezik

• Jezik: Neznan jezik

Izvleček

In recent decades the use and consumption of wood biomass is increasing. Thus there is a need to improve the market of biomass - from extraction to drying and storage. A study in the present thesis is based on the drying of wood chips. Fresh logs were used in the experiment, from which a part was ground into wood chips (4 boxes). The remaining logs were stacked in the warehouse, where we measured their moisture. Three boxes of wooden chips were placed outside; the first uncovered, the second covered with same time diffusion opened foil, the third with PVC foil, and the fourth, again uncovered, was located in an enclosed air space. The experiment lasted for about 4 months. After that time the logs were also ground so the comparison of the dryness of wood chips could be done. During the experiment the temperatures in the boxes were measured with DS1923 iButton temperature gauge, humidity of chips with a device for measuring moisture FMG 3000 and the moisture in roundwood with the probe Testo hygrotest 6500. The results show that the wood chips in a confined space had the lowest range of humidity, and those outside and uncovered had the highest. Chips, made out of roundwood, were dryer only in two cases, compared to chips in other four boxes. According assumptions there were two reasons for this result: the first was the fact that the stack of roundwood was not covered, and the second was lots of rain during the experiment.