diplomsko delo
Aleks Šulc (Avtor), Aleš Straže (Recenzent), Dominika Gornik Bučar (Mentor), Peter Prislan (Komentor)

Povzetek

Lesna biomasa se zaradi energijsko dobrih lastnostni uporablja kot kurivo v obliki peletov, briketov, sekancev in drv. Surovina za proizvodnjo peletov so najpogosteje ostanki iz proizvodnje žaganega lesa in manj kakovosten les. Ker poraba lesnih peletov konstantno narašča, se iščejo alternativni materiali za proizvodnjo peletov. Izdelali smo pelete iz ostankov kave in žagovine v različnih razmerjih (100:0, 75:25, 50:50 in 25:75). Peletom, ki smo jih izdelali, smo skladno s standardom SIST EN ISO 17225 določili kakovost: vlažnost, gostoto nasutja, mehansko obstojnost, vsebnost pepela, kalorično vrednost in trdoto. Rezultate smo primerjali s komercialno dostopnimi peleti, izdelanimi izključno iz lesne biomase. Ugotovili smo, da kakovost peletov z večjanjem deleža ostankov kave pada in peleti ne dosegajo zahtev standarda za najvišji kakovostni razred zaradi kriterija mehanske obstojnosti. Peleti z večjim deležem kavnih ostankov dosegajo višje kurilne vrednosti. Ostanki kave predstavljajo potencial pri izdelavi peletov, predvsem kot dodatek/primes lesni biomasi, pri čemer je potrebno optimirati pripravo surovine in postopek peletiranja.

Ključne besede

lesni peleti;peletiranje;nelesni peleti;trdota peletov;kakovost peletov;vlažnost;gostota nasutja;mehanska obstojnost;vsebnost pepela;

Podatki

Jezik: Slovenski jezik
Leto izida:
Tipologija: 2.11 - Diplomsko delo
Organizacija: UL BF - Biotehniška fakulteta
Založnik: [A. Šulc]
UDK: 630*839.8
COBISS: 239435011 Povezava se bo odprla v novem oknu
Št. ogledov: 110
Št. prenosov: 15
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarni naslov: Pellet quality made from spent coffee grounds and sawdust
Sekundarni povzetek: Wood biomass is used as fuel due to its good energy properties, in the form of pellets, briquettes, chips, and firewood. The raw material for the production of pellets is most often waste from sawmill production and lower-quality wood. However, since the consumption of wood pellets is constantly increasing, alternative materials are being sought. We thus produced pellets from coffee grounds and sawdust in various ratios (100:0, 75:25, 50:50, and 25:75). We determined the quality of the pellets we produced in accordance with the SIST EN ISO 17225 standard: moisture content, bulk density, mechanical durability, ash content, calorific value, and hardness. We compared the results with those for commercially available pellets made exclusively from wood biomass. We found that the quality of pellets decreases as the proportion of coffee grounds increases, and the pellets do not meet the requirements of the highest quality class standard, due to the mechanical durability criterion. Pellets with a higher proportion of coffee grounds achieve higher calorific values. Coffee grounds represent a potential in pellet production, primarily as an additive or admixture to wood biomass, where raw material preparation and the pelleting process need to be optimized.
Sekundarne ključne besede: wood pellets;pellets;non-wood pellets;pellets hardness;pellet quality;moisture content;bulk density;mechanical durability;ash content;
Vrsta dela (COBISS): Diplomsko delo/naloga
Študijski program: 0
Komentar na gradivo: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Strani: 1 spletni vir (1 datoteka PDF (VIII, 38 str.))
ID: 26594134