Parameter estimation and model selection for water vapour sorption of welded bond-line of European beech and Scots pine

IF 2.2 3区 农林科学 Q2 FORESTRY Holzforschung Pub Date : 2023-06-09 DOI:10.1515/hf-2022-0013
M. Vaziri, Christopher H. Dreimol, Lars Abrahamsson, P. Niemz, D. Sandberg
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Abstract

Abstract The single exponential kinetics (SEK) and parallel exponential kinetics (PEK) models were fitted to kinetic sorption data of welded and unwelded Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.). Furthermore, diffusion coefficients of water vapour in wood were determined using two different Fickian diffusion solutions. The objective was to identify how well these models could represent the moisture contents of the specimens and to characterize differences between the sorption behaviour of welded and unwelded wood. This knowledge can be used to enhance the moisture resistance of welded wood, develop drying schedules, and improve the quality of timbers. The PEK and SEK models provided the most precise and the second most precise fits to the sorption kinetic data, respectively. The two Fickian models are equivalent when both the infinite series are truncated at n = 10 $n=10$ . The Fickian models also exhibited the highest discrepancy with the experimental data. Nevertheless, the Fickian models fit relatively better to the sorption data of the welded wood than to that of the unwelded wood. This behaviour may be due to the rigid and less-swelling structure of the welded bond line.
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欧洲山毛榉和苏格兰松焊接结合线水蒸气吸附的参数估计和模型选择
摘要采用单指数动力学(SEK)和平行指数动力学(PEK)模型拟合焊接和未焊接的苏松和欧洲山毛榉(Fagus sylvatica L.)的吸附动力学数据。此外,用两种不同的菲克扩散溶液测定了水蒸气在木材中的扩散系数。目的是确定这些模型如何很好地代表样品的水分含量,并表征焊接和未焊接木材的吸收行为之间的差异。这些知识可以用来提高焊接木材的抗湿性,制定干燥时间表,提高木材的质量。PEK和SEK模型分别提供了最精确和第二精确的吸附动力学数据拟合。当两个无穷级数都截断于n=10$ n=10$时,两个菲克模型是等价的。菲克模型与实验数据的差异也最大。然而,菲克模型相对于未焊接木材的吸收数据拟合得更好。这种行为可能是由于焊接结合线的刚性和较少膨胀的结构。
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来源期刊
Holzforschung
Holzforschung 工程技术-材料科学:纸与木材
CiteScore
4.60
自引率
4.20%
发文量
83
审稿时长
3.3 months
期刊介绍: Holzforschung is an international scholarly journal that publishes cutting-edge research on the biology, chemistry, physics and technology of wood and wood components. High quality papers about biotechnology and tree genetics are also welcome. Rated year after year as one of the top scientific journals in the category of Pulp and Paper (ISI Journal Citation Index), Holzforschung represents innovative, high quality basic and applied research. The German title reflects the journal''s origins in a long scientific tradition, but all articles are published in English to stimulate and promote cooperation between experts all over the world. Ahead-of-print publishing ensures fastest possible knowledge transfer.
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