A study on thermal drying of wood

• Autorzy: Haghi A. K. , Haghi R. K.
• Języki publikacji: EN

Abstrakty

EN

Drying is a complex operation involving transient transfer of heat and mass along with several rate processes, such as physical or chemical transformations, which in turn, may cause changes in product quality. This article surveys the impacts of convective, infrared and microwave drying on the strength of dried wood. The effects of drying methods on mechanical properties have been studied for many materials, but wood products have seldom been the subject. Spruce wood samples (length = 140 mm and diameter = 21.0 mm) were dried using the following drying regimes: convective (1000 C and 400 C), microwave (480, 790, and 1000 W power) and infrared (100% power). The dried sampies were then subjected to tensile loading in order to evaluate the mechanical properties. It is concluded that the microwave drying can improve the strength of dried samples significantly.

Słowa kluczowe

EN

thermal drying; wood; mechanical properties

PL

osuszanie termiczne; drewno

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2007
• Tom: Vol. 12, no 3
• Strony: 865--873
• Opis fizyczny: Bibliogr. 8 poz, wykr.

Twórcy

autor

Haghi A. K.

autor

Haghi R. K.

• The University of Guilan P. o. Box 3756, Rasht, IRA,

Bibliografia

• Haghi A.K. (2005): A study of heat and mass transfer in porous material under equilibrium conditions. - Theoretical Foundations of Chemical Engineering, vol.39, No.2, pp.200-203.
• Haghi A.K. and Ghanadzadeh H. (2005): A study of thermal drying process. - Indian Journal of Chemical Technology, vol.12, pp.654-663.
• Scheigger A.E. (1958): The Physics of Flow Through Porous Media. - University of Toronto Press.
• Plumb O.A., Spolek G.A. and Olmstead B.A. (1985): Heat and mass transfer in wood drying. - Int. J. Heat Mass Transfer, vol.28, pp.1669-1678
• Basilico C. and Martin M. (1984): Approache expèrimentale des mecanismes de transfert au cours du séchage convective à haute temperature d'un bois (In French). - Int. J. Heat Mass Transfer, vol.27, pp.657-688.
• Haghi A.K., Ghanadzadeh H. and Rondot D. (2004): Experimental survey on microwave drying of porous medi. - Iran. J. Chem and Chem. Eng., vol.24, No.2, pp.1-10.
• Haghi A.K. (2003): Thermal analysis of drying process- a theoretical approach. - Journal of Thermal Analysis and Calorimetry, vol.74, pp.827-840.
• Haghi A.K. and Valizadeh M. (2004): Experimental investigation on microwave drying. - International Journal of Heat and Technology, vol.22, No.2, pp.167-172.