Title:
Fuel Quality, Storage and Combustion Behavior of Novel Wood Fuels Produced with an Innovative Duplex-Spiral Chipper
Author(s):
Lesche, S., Kuptz, D., Albersinger, C., Russ, M., Knappe, V., Schön, C., Pelz, S., Hartmann, H.
Document(s):
Paper
Slide presentation
Abstract:
The Effiter 20.30 is an innovative duplex-spiral chipper that produces novel fuels (“Effits”) that strongly deviate from conventional wood chips in their particle size, particle form and in their lower share of fines. These fuels might offer advantages during storage, artificial drying and combustion. Five different assortments (whole trees of European poplar from short rotation coppice, stemwood of Norway spruce and European beech, forest residues from hardwood and softwood) were comminuted with the Effiter and a reference drum chipper. During chipping, the Effiter produced coarse particles with a pre-broken structure and significantly lower shares of fines (< 3.15 mm) compared to a conventional wood chips (Effits: 2.1 w-% ± 2.7 vs reference fuel: 4 w-% ± 1.0). The novel chipper reached lower throughput rates in all trials (Effits: 4.0 tdm/h ± 1.8 vs reference fuel: 6.5 tdm/h ± 2.9), as well as higher fuel consumption due to differences in chipper size class. Natural drying during five months of storage performed better with Effits compared to conventional wood chips and dry matter losses were decreased (Effits: 6.5 w-% ± 7.8 vs reference fuel: 11.6 w-% ± 7.0). The Effits showed lower air pressure resistance during artificial ventilation than the reference chips but proved to be more energy demanding on a conventional screw-conveyer. Combustion trials in a 20 kW boiler showed no clear differences in emissions (CO, NOX, TPM) between the two chipping variants. Overall, the novel fuels produced with the Effiter 20.30 might be an interesting alternative to conventional wood chip production especially for private forest owners with a high fuel quality demand and limited access to artificial drying systems.
Keywords:
combustion, drying, solid biofuel, wood chip, comminution, chipping
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Production and Supply of Solid Fuels and Intermediates
Event:
29th European Biomass Conference and Exhibition
Session:
2AO.2.1
Pages:
370 - 378
ISBN:
978-88-89407-21-9
Paper DOI:
10.5071/29thEUBCE2021-2AO.2.1
Price:
FREE
