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Prediction of Heat-treatment Time of Black Pine Log Damaged by Pine Wilt Disease

소나무재선충병 피해를 받은 곰솔 원목의 열처리 소요시간 예측

Han, Yeonjung;Seo, Yeon-Ok;Jung, Sung-Cheol;Eom, Chang-Deuk
한연중;서연옥;정성철;엄창득

  • Received : 2016.02.11
  • Accepted : 2016.03.14
  • Published : 2016.05.25

Abstract

The black pine logs damaged by pine wilt disease in Jeju-do were heat-treated to extend the utilization of domestic trees damaged by pine wilt disease. The heat-treatment of wood requires wood to be heated to $56^{\circ}C$ for 30 min at the core. The average moisture content and top-diameter of the black pine logs were ranged from 46% to 141% and from 180 mm to 500 mm, respectively. And the basic specific gravity and oven-dry specific gravity of the black pine logs were 0.47 and 0.52, respectively. The time required for heat-treatment at $105^{\circ}C$ temperature was ranged from 7.7 h to 44.2 h, depending on moisture content and top-diameter. The temperature distribution was used to predict the time required for heat-treatment of black pine log with various moisture contents and top-diameters using finite difference method. The thermal properties of wood including the thermal conductivity and specific heat in accordance with moisture content were calculated. Heat transfer coefficient for mixed convection in form of adding natural convection and forced convection was used for heat transfer analysis. The error between the measured and predicted values ranged from 3% to 45%. The predicted times required for heat-treatment of black pine log with 50% moisture content and 200 mm, 300 mm, and 400 mm top-diameter were 10.9 h, 18.3 h, and 27.0 h, respectively. If the initial moisture content of black pine log is 75%, heat treatment times of 13.6 h, 22.5 h, and 32.8 h were predicted in accordance with top-diameter. And if the initial moisture content of black pine log is 100%, heat treatment times of 16.2 h, 26.5 h, and 38.2 h were predicted in accordance with top-diameter. When the physical properties of logs damaged by pine wilt disease are presented, these results can be applicable to the heat-treatment of red pine and Korean pine logs as well.

Keywords

heat-treatment;pine wilt disease;heat transfer;finite difference method;black pine

References

  1. Avramidis, S., Papathanasiou, T., Engelzos, P. 1992. Modeling of dynamic nonisothermal moisture diffusion, Vienna, Austria, 3rd IUFRO International Wood Drying Conference, pp. 29-37.
  2. Awbi, H.B. 1998. Calculation of convective heat transfer coefficients of room surfaces for natural convection. Energy and Buildings 28: 219-227. https://doi.org/10.1016/S0378-7788(98)00022-X
  3. Awbi, H.B., Hatton, A. 2000. Mixed convection from heated room surfaces. Energy and Buildings 32: 153-166. https://doi.org/10.1016/S0098-8472(99)00063-5
  4. Chen, Q., Mayers, C.A., Kooi, J.v.d. 1989. Convective heat transfer in rooms with mixed convection. In: Liege, Belgium, International Seminar on Indoor Air Flow Patterns in Ventilated Spaces, pp. 69-82.
  5. Deliiski, N. 2011. Transient Heat Conduction in Capillary Porous Bodies. In: Convection and Conduction Heat Transfer, Ed. by Ahsan, A., InTech, Rijeka, Croatia.
  6. Dwinell, L.D. 1997. The pinewood nematode: regulation and mitigation. Annual Review of Phytopathology 35: 153-166. https://doi.org/10.1146/annurev.phyto.35.1.153
  7. Eom, C.-D., Han, Y., Shin, S.-C., Chung, Y.-J., Jung, C.-S., Yeo, H. 2007. Study on heat treatment of red pine log. Journal of The Korean Wood Science and Technology 35(6): 50-56.
  8. Eom, C.-D., Park, J.-H., Han, Y., Shin, S.-C. Chung Y.-J., Jung, C.-S., Yeo, H. 2008. Evaluation of energy consumption in heat treatment of pine log. Journal of The Korean Wood Science and Technology 36(6): 41-48.
  9. Food and Agriculture Organization. 2009. International Standards for Phytosanitary Measures: Guidelines for regulating wood packaging material in international trade. Food and Agriculture Organization, Rome, Italy.
  10. Glass, S.V., Zelinka, S.L. 2010. Moisture Relations and Physical Properties of Wood. In: Wood Handbook: Wood as an Engineering Material (Centennial ed.). Forest Products Laboratory, Madison, USA.
  11. Hollman, J.P. 1989. Heat Transfer (SI metric ed.). McGraw-Hill, Sydney, Australia.
  12. Incropera, F.P., Dewitt D.P. 2002 Fundamentals of Heat and Mass transfer (5th ed.). Wiley, New York, USA.
  13. Korea Forest Research Institute. 2012. Forest Technology Handbook. Korea Forest Research Institute, Seoul, Korea.
  14. MacLean, J.D. 1941. Thermal conductivity of wood. Heating, piping, and air conditioning 13: 380-391.
  15. Mamiya, Y. 1972. Pine wood nematode, Bursaphelenchus lignicolus Mamiya and Kiyohara, as a causal agent of pine wilting disease. Review of Plant Protection Research 5: 46-60.
  16. Mamiya, Y. 1976. Pine wilting disease caused by the pine wood nematode, Bursaphelenchus xylophilus, in Japan. The Japan Agricultural Research Quarterly 10(4): 207-211.
  17. Mota, M.M., Penas, A.C., Bravo, M.A., Sousa, E., Braasch, H. 1999. First report of Bursaphelenchus xylophilus in Portugal and in Europe. Nematology 1(7): 727-734. https://doi.org/10.1163/156854199508757
  18. Mota, M.M., Vieira, P.R. 2008. Pine Wilt Disease: A Worldwide Threat to Forest Ecosystems. Springer, Netherlands.
  19. Neiswanger, L., Johnson, G.A., Carey, V.P. 1987. An experimental study of high Rayleigh number mixed convection in a rectangular enclosure with restricted inlet and outlet openings. Journal of Heat Transfer 109: 446-453. https://doi.org/10.1115/1.3248102
  20. Perre, P., Moser, M., Martin, M. 1993. Advances in transport phenomena during convective drying with superheated steam and moist air, Journal of Heat and Mass Transfer 36(11): 2725-2746. https://doi.org/10.1016/0017-9310(93)90093-L
  21. Radmannovic, K. Dukic, I., Pervan, S. 2014. Specific heat capacity of wood. Drvna Industrija 65(2): 151-157. https://doi.org/10.5552/drind.2014.1333
  22. Ranta-Maunus, A. 1994. Computation of moisture transport and drying stresses by a 2-D FE-programme, Rotorua, New Zealand, 4th IUFRO International Wood Drying Conference, pp. 187-194.
  23. Sutherland, J.W., Turner, I., Northway, R.L. 1992. A theoretical and experimental investigation of the convective drying of Australian Pinus radiata timber, Vienna, Austria, 3rd IUFRO International Wood Drying Conference, pp. 145-155.
  24. Tares, S., Abad, P., Bruguier, N., Deguiran, G. 1992. Identification and evidence for relationships among geographical isolates of Bursaphelenchus xylophilus spp (pinewood nematode) using homologous DNA probes. Heredity 68: 157-164. https://doi.org/10.1038/hdy.1992.24
  25. Tomminen, J., Lahtinen, J. 1990. Interception of the pinewood nematode, Bursaphelenchus xylophilus, in green lumber imported to Finland from Canada. Nematologica 36: 397.
  26. Yeo, H., Jung, H.-S. 1994. Distribution model based on computer simulation for internal temperature and moisture content in press drying of tree disks. Journal of The Korean Wood Science and Technology 22(2): 61-70.
  27. Yun, S.-L., Chong, S.-H., Seo, D.-J., Won, K.-R., Park, H.-M., Kim, J.-G., Byeon, H.-S. 2012. The effect of soaking and fumigation treatments on bending properties and hardness of pine wilt disease infected wood. Journal of The Korean Wood Science and Technology 40(1): 53-59. https://doi.org/10.5658/WOOD.2012.40.1.53
  28. Yun, S.-L., Park, J.-H., Park, H.-M., Kim, J.-G., Byeon, H.-S. 2009. The nematode density and compressive strength properties of pine wilt disease damaged trees by soaking and fumigating treatment I. Journal of The Korean Wood Science and Technology 37(3): 200-207.

Acknowledgement

Grant : 산림생태계 유지·증진 연구

Supported by : 국립산림과학원