Predicting Average Moisture Content of Wood in a Changing Environment

Eugene M. Wengert

Abstract


In the past, predicting the behavior of wood exposed to a variable temperature and humidity environment was based on experience. However, with recent advances in solving complicated heat and mass transfer problems with the digital computer, prediction of the behavior of wood exposed to a variable temperature and humidity environment has become possible.

This report examines several of the factors that influence wood's behavior and gives some simplifications necessary to formulate an adequate model of moisture movement in wood. A series of experiments was conducted to measure moisture content of wood in a changing temperature and humidity environment. These measurements were compared with the results predicted from the model using a digital computer. The model was adequate for predicting the moisture response of the samples used in these experiments.


Keywords


<i>Picea engelmaunii</i>;<i>Tsuga heterophylla</i>;<i>Populus grandidentata</i>;<i>P. deltoides</i>;<i>Prunas serotina</i>;<i>Acer rubrum</i>;<i>Ulmus americana</i>;<i>Quercus alba</i>;<i>Q. rubra</i>;moisture gradients;diffusion coefficients;equilibrium moisture content;relative vapor pressure;vapor diffusion;vapor pressure

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