Skip to main content
Journal of Wood Science

Official Journal of the Japan Wood Research Society

Download PDF
  • Original Article
  • Published:

New monitoring concept of moisture content distribution in wood during RF/vacuum drying

Journal of Wood Science volume 53, pages 1–4 (2007)Cite this article

Abstract

A new method for monitoring moisture content during radio-frequency (RF)/vacuum drying was developed by measurement of temperature and pressure in wood. Temperature and pressure inside the wood were measured simultaneously during RF/vacuum drying at the same point. The relative humidity (RH) and moisture content (MC) below the fiber saturation point (FSP) were calculated based on temperature and pressure, and the relationship between the temperature, RH, and equilibrium moisture content (EMC) at the measurement point. When the moisture content was below the FSP, the calculated MC was slightly greater than the value given by oven drying. The absolute error was within 0.8% near the open cross side, and was within 1.8% at another measurement point. Thus, we concluded that it was practicable to monitor the moisture content below the FSP according to the temperature and pressure inside the wood.

References

  1. Koumoutsakos A, Avramidis S, Hatzikiriakos SG (2001) Radio frequency vacuum drying of wood. II. Experimental model evaluation. Dry Technol 19:85–98

    Article  CAS  Google Scholar 

  2. Cai YC, Hayashi K (2001) Pressure and temperature distribution in wood during radio-frequency/vacuum drying. Proceedings of the 7th International IUFRO Wood Drying Conference, Tsukuba, Japan, pp 386-391

  3. Kollmann FFP, Cote WA Jr, Wilfred ACJ (1968) Principles of wood science and technology I. Solid wood. Springer, Berlin Heidelberg New York

    Book  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Key Laboratory of Bio-based Material Science and Technology (Northeast Forestry University), Ministry of Education, Harbin, 150040, PR China

    Yingchun Cai

  2. Department of Forest Resources, Faculty of Agriculture, Ehime University, Tarumi, Matsuyama, 790-8566, Japan

    Kazuo Hayashi

Authors
  1. Yingchun Cai
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Kazuo Hayashi
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Kazuo Hayashi.

Additional information

Part of this study was presented at the 15th Annual Meeting of the Chugoku Shikoku Branch of the Japan Wood Research Society, Higashi-Hiroshima, Japan, September 2003

Rights and permissions

Reprints and permissions

About this article

Cite this article

Cai, Y., Hayashi, K. New monitoring concept of moisture content distribution in wood during RF/vacuum drying. J Wood Sci 53, 1–4 (2007). https://doi.org/10.1007/s10086-006-0813-4

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10086-006-0813-4

Key words