Thermophysical properties of OSB boards versus equilibrium moisture content

Abstract

The basic thermophysical properties of oriented strand boards were determined experimentally for use in humid conditions (OSB3) depending on the moisture content. The dependency between the thermal conductivity, thermal diffusivity, specific heat capacity, and the moisture content in the range of 0% to 10%, was examined. The non-stationary extended dynamic plane source (EDPS) experimental method was used. EDPS method was modified for anisotropic materials, i.e. with special considerations of heat-loss effect occurring at the edge of measuring samples, finite geometry of the sample and orthotropic thermal conductivity, for use with anisotropic materials. The validity of the experimental method was verified on polymethylmethacrylate (PMMA) samples. The error rate of measurements conducted on PMMA samples was less than 3%, and for OSB3 boards it was less than 5.5%. Based on the experimental results, regression equations of the dependency between the monitored properties and the moisture content were determined. In the case of thermal conductivity and thermal capacity, the determined dependencies showed a high correlation rate.

Thermal properties of wood and wood composites made from wood waste

“…The volume specific heat of the wood samples in the radial direction were: softwood -spruce (0.503-0.575 10 6 J m -3 K -1 ), black pine (0.582-0.664 10 6 J m -3 K -1 ), hardwood -beech (0.758-0.820 10 6 J m -3 K -1 ), oak (0.813-0.890) 10 6 J m -3 K -1 ) and medium hardwood -chestnut (0.649-0.728 10 6 J m -3 K -1 ). In the literature, the values of mass specific heat were presented by Glass and Zelinka, (2010), Peere and Keey (2014), Radmanović et al (2014) and Igaz et al (2017), so in order to make a data comparison the values of volume specific heat were divided by the density of the wood sample, the partial results are in good agreement with the values presented in the literature by Czajkowski et al (2016), Sonderegger et al (2011 and Kühlmann (1962). They reported that the cause of various values of thermal parameters in the tangential and radial directions of the hardwood samples (oak, beech) is high-density wood fibre, but on the other hand, in the samples of softwood (spruce, pine) it is the low density of wood fibre.…”

Influence of Flame Retardant Impregnation on Acoustic and Thermophysical Properties of Recycled Technical Textiles with the Potential for Use in Wooden Buildings

“…The EDPS (Extended Dynamic Plane Source) method was used to measure physical properties. It is one of the non-stationary methods for this purpose [32, EDPS method is based on the Dynamic Plane Source (DPS) method, andit can be investigate the thermal conductivity, thermal diffusivity and specific heat capacity conductivity materials (λ ≤ 2 W•m −1 •K −1 ) [34,35]. Figure 5 shows the device scheme The EDPS (Extended Dynamic Plane Source) method was used to measure thermophysical properties.…”

“…It is one of the non-stationary methods for this purpose [32,33]. The EDPS method is based on the Dynamic Plane Source (DPS) method, andit can be used to investigate the thermal conductivity, thermal diffusivity and specific heat capacity of low-conductivity materials (λ ≤ 2 W•m −1 •K −1 ) [34,35]. Figure 5 shows the device scheme.…”

Selected Properties of Cement Bound Spruce and Larch Bark Bio-Aggregates

“…Assuming an average bark content of 10%, around 150-180 × 10 6 m 3 bark is produced annually by industrial wood logs [19]. Except for energy generation, tree bark can be used as thermal insulating [22][23][24] and sound absorbing material [25,26] as fire-retardant panels [27], as single-layer [28,29] or 3-layers particleboard [30], medium density fibreboards [31] and oriented strand boards [32,33].…”