Fundamentals of flakeboard manufacture: wood-moisture relationships |
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| Authors: | F A Kamke M P Wolcott |
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| Institution: | (1) Dept. Wood Science and Forest Products, Brooks Forest Products Center Virginia Polytechnic Institute and State University, 24061-0503 Blacksburg, VA, USA;(2) Wood Science West Virginia University, 26506 Morgantown, WV, USA |
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| Abstract: | Summary A procedure is presented to estimate the relative vapor pressure, equilibrium moisture content, average flake temperature, and average flake moisture content in a flakeboard mat during hot-pressing. This method is based on measurements of temperature and total gas pressure in the mat during hot-pressing. A heat and mass transfer model was adapted from the literature to predict the temperature and moisture content inside an individual flake. Significant moisture gradients are predicted to develop within flakes. Convective heat transfer appears to control the change of moisture content within a flake. Thermodynamic equilibrium between the gas phase and the wood component is not achieved during hot-pressing.This work was funded by the USDA Competitive Grant Program for Forest and Rangeland Renewable Resources, Project No. 85-FSTY-9-0106 and 87-FSTY-9-0253 |
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