University of Oulu

Lindblad J., Routa J., Ruotsalainen J., Kolström M., Isokangas A., Sikanen L. (2018). Weather based moisture content modelling of harvesting residues in the stand. Silva Fennica vol. 52 no. 2 article id 7830. 16 p.

Weather based moisture content modelling of harvesting residues in the stand

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Author: Lindblad, Jari1; Routa, Johanna1; Ruotsalainen, Johanna2;
Organizations: 1Natural Resources Institute Finland (Luke), Production systems, Yliopistokatu 6, FI-80100 Joensuu, Finland
2Finnish Meteorological Institute, Aviation and Military Weather Services, P.O. Box 1627, FI-70211 Kuopio, Finland
3University of Eastern Finland, School of Forest Sciences, P.O. Box 111, FI-80101 Joensuu, Finland
4University of Oulu, Control Engineering, P.O. Box 8000, FI-90014 University of Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.9 MB)
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Language: English
Published: Finnish Society of Forest Science, 2018
Publish Date: 2018-06-21


Harvesting residues collected from the final cuttings of boreal forests are an important source of solid biofuel for energy production in Finland and Sweden. In the Finnish supply chain, the measurement of residues is performed by scales integrated in forwarders. The mass of residues is converted to volume by conversion factors. In this study, weather based models for defining the moisture content of residues were developed and validated. Models were also compared with the currently used fixed tables of conversion factors. The change of the moisture content of residues is complex, and an exact estimation was challenging. However, the model predicting moisture change for three hour periods was found to be the most accurate. The main improvement compared to fixed tables was the lack of a systematic error. It can be assumed that weather based models will give more reliable estimates for the moisture in varying climate conditions and the further development of models should be focused on obtaining more appropriate data from varying drying conditions in different geographical and microclimatological locations.

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Series: Silva Fennica
ISSN: 0037-5330
ISSN-E: 2242-4075
ISSN-L: 0037-5330
Volume: 52
Issue: 2
Article number: 7830
DOI: 10.14214/sf.7830
Type of Publication: A1 Journal article – refereed
Field of Science: 4112 Forestry
Funding: Financial contribution and support of Metsäteho ltd., Stora Enso ltd, UPM-Kymmene ltd., Metsä-Group, Tekes, MTK, Koneyrittäjät, The Bioenergy Association of Finland and Ministry of Agriculture and Forestry is gratefully acknowledged.
Copyright information: © 2018 The Authors. Licenced CC BY-SA 4.0