A Study on the Distribution and Time Dependent Change of the Temperature in the Wood Affected by Solar Radiation

The fluctuation of physical properties in wood or wood composites is an important subject when the materials are used as building materials. Sorption and desorption would be happened in wood when exposed to the open air, and the temperature distribution of wood will be fluctuated by environmental temperature, humidity, solar radiation, wind velocity, etc. In this study, the temperature difference and fluctuation among different wood species were analyzed using numerical method. The effect in the process of heat transfer in wood caused by environment was investigated using 1-D partial differential equation with real boundary and initial conditions. The experimental data have been used to check the accuracy of programmed code. Through analysis, it was found out that density and moisture content have negative effect to the thermal diffusivity. The density is the main factor that influences heat transfer behaviour in wood.