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Moisture transport in birch lumber at low radio-frequency and contact vacuum drying

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Abstract

Results of the dynamic distribution of moisture content, temperature, and internal overpressure at low radio-frequency (LRF), up to 100 kHz, and vacuum contact drying are presented. To minimize structural changes of lumber, low temperature drying (less than 70 °C) was used. Contact vacuum drying with LRF volume heating decreases the moisture gradient compared to conductive vacuum drying and increases moisture removal rate by 25 %. The heat consumption energy and electrical energy for drying were determined. The significant influence of the internal overpressure on the moisture transport in birch lumber was proven.

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Authors and Affiliations

  1. Institute of High Technology Physics, National Research Tomsk Polytechnic University, 2a Lenin av., Tomsk, 634028, Russia

    V. V. Lopatin, M. A. Goreshnev & F. G. Sekisov

Authors
  1. V. V. Lopatin
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  2. M. A. Goreshnev
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  3. F. G. Sekisov
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Correspondence to M. A. Goreshnev.

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Lopatin, V.V., Goreshnev, M.A. & Sekisov, F.G. Moisture transport in birch lumber at low radio-frequency and contact vacuum drying. Eur. J. Wood Prod. 72, 779–784 (2014). https://doi.org/10.1007/s00107-014-0835-3

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  • DOI: https://doi.org/10.1007/s00107-014-0835-3

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