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Evaluation of three semi-empirical models for superheated steam vacuum drying of timbers
Department of Wood Science, University of British Columbia, Vancouver.ORCID iD: 0000-0002-0744-5868
Forintek Canada Corporation, Western Laboratory, Vancouver, BC.
University of British Columbia, Department of Wood Science.
2003 (English)In: Drying Technology, ISSN 0737-3937, E-ISSN 1532-2300, Vol. 21, no 5, p. 875-893Article in journal (Refereed) Published
Abstract [en]

Superheated steam drying at sub-atmospheric pressure (SSV) has been successfully employed in Europe and Asia for drying some types of timbers, showing that drying time could be reduced by 50% with respect to conventional drying without significant losses in the quality of the final product. This reduction is the consequence of a different heat and mass transfer control mechanism. Since SSV drying is carried out in absence of gaseous air, diffusion of the generated vapor is not a limiting factor and drying rate becomes more dependent on heat transference. Therefore, classical interpretation of timber drying as a process based on moisture migration control is not applicable to SSV. This work is targeting the development and validation of a simplified semi-empirical model for SSV drying of timbers. Mathematical representation of the proposed model is uncomplicated and straightforward to apply, and the comparison between model predicted and experimental data showed a high degree of agreement under variable drying conditions.

Place, publisher, year, edition, pages
2003. Vol. 21, no 5, p. 875-893
National Category
Bio Materials
Research subject
Wood Physics
Identifiers
URN: urn:nbn:se:ltu:diva-6754DOI: 10.1081/DRT-120021690Local ID: 50a28f36-150b-42c4-8b5a-16980f2ded31OAI: oai:DiVA.org:ltu-6754DiVA, id: diva2:979640
Note
Upprättat; 2003; 20140514 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Elustondo, Diego

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