Measurements of moisture diffusion coefficient of wood wool

The moisture diffusion coefficient of wood wool was determined using two analytical methods - Crank's initial sorption method and Liu's method. Measurements were carried out for two ranges of relative humidity in the air around the samples (RH ranges from 0% to 45% and from 45% to 90%). Samples of two types of wood wool were analyzed: the first - with a declared thermal conductivity coefficient of 0.038 W/m∙K and the second - with a declared thermal conductivity coefficient of 0.036 W/m∙K. For the materials examined, the value of the moisture diffusion coefficient decreases as the relative humidity increases.