Title:
Efficient Preservation of Technically Dried Wood Chips - a Comparison Between Outdoor Storage with a Fleece Cover and Storage in a Storehouse
Author(s):
Hofmann, N., Riebler, M., Burger, F., Borchert, H.
Document(s):
Paper
Slide presentation
Abstract:
One of the research questions of the joint research project “Efficient Storage and Processing Techniques for Wood Chips” was, if storing technically dried wood chips outdoors with a fleece cover leads to the same results concerning fuel quality and dry matter losses as storage in a storehouse. Therefore, an outdoor experiment was conducted from June to November 2018 at a wood chip storage site near Munich. Two 80 lcm - piles of technically dried wood chips from spruce energy roundwood were built up, equipped with temperature sensors and 36 balance bags with wood chip samples. One pile was put up outside and covered with a vapor-permeable fleece (PolyTex, 200 g/m˛, Zill GmbH & Co. KG). As a reference, a second pile was put inside a storehouse nearby. The wood chips were technically dried to a moisture content of approx. 14 w-% by a biomass service contractor prior to storage. After five months the balance bags were removed and analyzed. There was hardly any change in moisture content and no dry matter loss. In addition to the main trial described above, two side trials were executed. A large-scale laboratory experiment was carried out from July to September 2018 to determine the average precipitation retention capacity (PRC) of the fleece. The weighted mean of the PRC was 84.7 %, considering the local precipitation distribution. For light rainfall it can be even more than 90 %. Furthermore, a laboratory experiment was conducted to estimate the influence of aging and usage of the fleece on its PRC. It turned out, that the properties of the fleece did not deteriorate after ten months of outdoor use.
Keywords:
dry matter losses, fuel quality, wood chip storage, vapor-permeable fleece cover, technical drying
Topic:
Biomass Resources
Subtopic:
Biomass feedstock, residues and by-products
Event:
27th European Biomass Conference and Exhibition
Session:
1AO.7.3
Pages:
57 - 62
ISBN:
978-88-89407-19-6
Paper DOI:
10.5071/27thEUBCE2019-1AO.7.3
Price:
FREE
