The Thermal Conductivity : Experimental Studies of Thermal Processes in Woodworking

• Autorzy: Malujda I. , Talaśka K. , Dudziak M.
• Języki publikacji: EN

Abstrakty

EN

During the modeling of thermal processes of woodworking it is need to do thermal conductivity testing. This is accomplished most frequently by using the method based on the theory of established heat conduction. The measurement involves the determination of the heat flux with a constant value flowing through a sample of the test material with specified dimensions. The original construction of the testing device was used to determine the coefficients of thermal conductivity. There were determined the characteristics of thermal conductivity ʎ and diffusivity α as a function of the temperature in the directions of orthotrophy L, T, R of the wood samples. The results of the tests performed for thermal properties of oak wood were presented. They will be used to formulate the constitutive equations describing the process of softening with a full and comprehensive description of the role and influence of the temperature on their effectiveness.

Słowa kluczowe

EN

thermal conductivity; heat conduction; diffusivity; wood

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Machine Dynamics Research
• Rocznik: 2014
• Tom: Vol. 38, No. 1
• Strony: 129--136
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Malujda I.

• Chair of Basics of Machine Design, Poznan University of Technology

autor

Talaśka K.

• Chair of Basics of Machine Design, Poznan University of Technology

autor

Dudziak M.

• Chair of Basics of Machine Design, Poznan University of Technology

Bibliografia

• [1] Encyclopedia of wood, 2007: US Department for Agriculture, Skyhorse Publishing Inc., 2007 - 496.
• [2] Hong-Mei Gu, A.Zink-Sharp, 2005: Geometric model for softwood transverse thermal conductivity. Part I, Wood and Fiber Science, 37(4), 2005, pp. 699-711.
• [3] Hobler, T.,1968: Heat transfer and heat exchangers, WNT Press, Warszawa 1968.
• [4] Hunt J.F., H. Gu, Lebow P.K., 2006: Theoretical thermal conductivity equation for uniform density wood cells, USDA Forest Service, Forest Products Laboratory 2006.
• [5] Kania S., 1990:Ileat flow in wood materials, Wyd. Pol. Wrocławskiej, Wroclaw 1990.
• [6] Malujda I., 2008: Plasticization of a bounded layer of anisotropic and porous materials, J. of Mechanics of Materials and Structures, PACAM X: Mechanics Pan America 2008, vol. 12, 386-390.
• [7] Malujda I., 2010: Plastic yield of particulate materials under the effect of temperature. Progress in Industrial Mathematics at ECM I2008, Copyright Springer-Verlag Berlin Heidelberg 2010, vol. 15, pp. 939-944. ISBN 978-3-642-12110-4.
• [8] Rice R.W., Shepard R., 2004: The thermal conductivity of plantation grown white pine (Pinus strobus) and red pine (P.resinosa) at two moisture content levels, Forest Products J. 2004-1, art. no. 9730.
• [9] Simpson W., TenWolde A., 1999: Physical properties and moisture relations of wood, Chapter 3 in Wood handbook-Wood as an engineering material, Gen. Tech. Rep. FPL-GTR-113. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory 1999.
• [10] Steinhagen H.P., 1977: Thermal conductive properties of wood, green or dry, from -40° to +100° C: a literature review, Forest Products Laboratory, Forest Service U.S. Dep. of Agriculture, FPL-9.
• [11] Yang Qing-Xian, 2001: Theoretical expressions of thermal conductivity of wood, Journal of Forestry Research, 12(1): 43-46 (2001).