Journal of Forestry Research

, Volume 29, Issue 3, pp 869–874 | Cite as

Vacuum press drying studies on two fast-growing Indian wood species

  • Shailendra Kumar
  • Rushikesh R. Topare
  • Jitendra Nagar
Original Paper


Two fast-growing Indian species, Melia composita Benth. and Eucalyptus tereticornis Sm., which have different sets of physical properties, were dried together in a vacuum press dryer (VPD) under two drying conditions, i.e., above boiling point (ABP) and below boiling point (BBP). The ABP and BBP conditions were maintained by keeping the temperature constant at 75 °C and maintaining two pressure levels: 300 mm of Hg (ABP) and 450 mm of Hg (BBP). In order to understand pressure conditions at the core during vacuum drying, a cylindrical brass pipe was inserted in both wood cores and attached with pressure gauges placed outside of the VPD. The results indicate that the Melia wood core attained equilibrium pressure immediately with the pressure of VPD, while Eucalyptus attained it very slowly, reaching equilibrium at later stages of drying when cracks and checks advanced to the core. The drying rate was higher for Melia than Eucalyptus under both drying conditions. The drying rate of Melia (ABP) was higher than Melia (BBP), however, the drying rate for Eucalyptus (ABP) was not significantly different from the BBP drying rate.


Vacuum press drying Melia composita Eucalyptus tereticornis Boiling point Wood core pressure 


  1. Bahri S, Kumar S (1982) Permeability studies on Eucalyptus hybrid. J Timber Dev Assoc (India) 28(3):32–40Google Scholar
  2. Chen Z, Lamb FM (1995) The concept of boiling front in vacuum drying. In: Vacuum drying of Wood’1995, Slovakia, pp 110–116Google Scholar
  3. Haar L, Gallagher JS, Kell GS (1984) NBS/NRC steam tables: thermodynamic and transport properties and computer programs for vapour and liquid states of water in SI units. Hemisphere Pub. Corp, Washington, DCGoogle Scholar
  4. Kumar S, Kelkar BU, Mishra AK, Jena SK (2016) Study of variability in some physical properties of plantation grown progenies of Melia composite Willd.and determination of a kiln drying schedule. J For Res (in press)Google Scholar
  5. Moyne C, Martin M (1992) Influence of a total pressure gradient in gaseous phase on drying with particular reference to wood. Int Heat Mass Transf 25(12):1839–1845CrossRefGoogle Scholar
  6. Pande PK, Aziz M, Uniyal S, Dhiman RC (2012) Variation in wood anatomical properties and specific gravity in relation to sexual dimorphism in Populus. Curr Sci 102(11):1580–1585Google Scholar
  7. Perre P, Mosnier S, Turner IW (2004) Vacuum drying of wood with radiative heating: I. Exp Proced AICHE J 50(1):97–107CrossRefGoogle Scholar
  8. Rajpoot SS, Shukla NK, Gupta VK, Jain JD (1996) Timber mechanics-strength classification and grading of timber. ICFRE, New Forest, p 189Google Scholar
  9. Sasaki K, Kawabe J, Mori M (1987) Vacuum drying of wood at high frequency (II), pressure within the lumber during evacuation and drying. Bull Kyushu Univ For 57:245–265Google Scholar
  10. Srivani P, Rao RV (2015) Wood anatomical structure of the clones of Eucalyptus Tereticornis Sm. (Mysore Gum). Int J Sci Technol Res 4(1):156–159Google Scholar
  11. Swaminathan C, Rao RV, Shashikala S (2012) Preliminary evaluation of variations in anatomical properties of Melia dubia Cav. wood. Int J Biol Sci 1(4):1–6Google Scholar

Copyright information

© Northeast Forestry University and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Shailendra Kumar
    • 1
  • Rushikesh R. Topare
    • 1
  • Jitendra Nagar
    • 1
  1. 1.Forest Products DivisionForest Research InstituteDehradunIndia

Personalised recommendations