Thermal conductivity and thermal diffusivity of timothy hay

Abstract

3). The mean thermal conductivity of timothy hay ranged from 0.0284 to 0.0605 W m -1 °C -1 . The thermal conductivity values increased with increasing temperature, moisture content, and bulk density. A multiple regression model was developed to predict the thermal conductivity of the timothy hay using initial hay temperature, moisture content, and bulk density. The model is valid within the limits of the parameters used in the experiments. The mean thermal diffusivity of the timothy hay ranged from1.042 x 10 -7 to 3.031 x 10 -7 m 2 /s. There were little or no linear relationships between thermal diffusivity and initial temperature, moisture content, and bulk density of timothy hay. Keywords: dual thermal probe, line heat source, timothy hay, thermal properties.