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Quality variation in comminuted forest fuels delivered during the winter in north Sweden

Berg, Simon and Bergström, Dan (2021). Quality variation in comminuted forest fuels delivered during the winter in north Sweden. International Journal of Forest Engineering. 32 , 11-18
[Research article]

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Swedish legislation stipulates the precision required for estimates of parameters used to determine the value of various forest fuels. The net energy value of fuel, as it is received, is often used to set the trade price. The estimate of energy content is based on the moisture content of samples taken from each truckload and the weight of the biomass; the ash content and net calorific value are measured a few times each year. Hence, it is necessary to know the variation in moisture content to ensure that a sufficient number of samples are taken, a number based on the allowed variation and precision of estimates, as defined in the legalization. In this study, the variation in moisture content was measured by taking samples from 18 truckloads of comminuted forest fuels during the winter. The results showed that the current sampling regime, i.e., manually taking four samples from each truckload, is sufficient for deliveries with 10 truckloads for logging residue chips and 4 for stem wood chips. The number of samples should be increased to 12-43, 8-21, and, 17-82 depending on assortment for what the measuring act defines as large deliveries (>=50 tonnes; >=3 truckloads), medium-sized deliveries (<50 - >25 tonnes; 2 truckloads) and single truck deliveries (<= 25 tonnes; 1 truckload), respectively. Current research into fast online sampling and analysis methods could resolve this issue for small deliveries.

Authors/Creators:Berg, Simon and Bergström, Dan
Title:Quality variation in comminuted forest fuels delivered during the winter in north Sweden
Series Name/Journal:International Journal of Forest Engineering
Year of publishing :2021
Page range:11-18
Number of Pages:8
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Bioenergy, trade, chips, fuel quality, moisture content, representative sampling
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Additional ID:
Type of IDID
Web of Science (WoS)000637942100003
ID Code:23696
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:17 May 2021 07:13
Metadata Last Modified:17 May 2021 07:21

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