Thermophysical and microstructural behavior of eleven tropical woods widely available and commonly used was investigated. Experimental measurements of thermal conductivity and thermal diffusivity of wood were performed using the heat flow meter and transient plane source technique. The results show values in the range of 0.2–0.37 mm²/s for thermal diffusivity and 0.12–0.34 W m⁻¹ K⁻¹ for thermal conductivity. The correlation between the thermal conductivity and parameters as porosity, pore size distribution, intensity ratio of lignin and microstructure was drawn. The thermal conductivity of wood decreases with the increase in pores volume (vp). For vp > 70%, the values are between 0.1 and 0.15 W m⁻¹ K⁻¹ and reach 0.23 W m⁻¹ K⁻¹ for vp between 40 and 60%. For dense woods with the vp less than 40%, the values are between 0.24 and 0.35 W m⁻¹ K⁻¹. The results show experimental values of the effective thermal conductivity of wood species closer to the values of parallel model. The presence of ray and parenchyma which appear perpendicular to the axis of the fibers in the structure of the wood species makes it difficult to have straight correlation. This suggests that heat flux which travels through the matrix of wood follows a very complex road linked to the microstructural features of each class of wood. These results appear as significant contribution for the future development of sustainable energy technologies in relation to the prediction of energy saving and building energy metering.

研究了广泛可用和常用的11种热带木材的热物理和微观结构行为。使用热流量计和瞬态平面源技术对木材的导热率和热扩散率进行了实验测量。结果显示，热扩散率的值在0.2-0.37 mm ² / s范围内，热导率的值在0.12-0.34 W m ^-1  K ^-1范围内。得出了导热系数与孔隙率，孔径分布，木质素强度比和微观结构等参数之间的关系。木材的导热系数随着孔体积（vp）的增加而降低。对于vp> 70％，该值介于0.1和0.15 W m ^-1  K ^-1之间对于40％至60％的vp达到0.23 W m ^-1  K ^-1。对于vp小于40％的茂密木材，其值在0.24和0.35 W m ^-1  K ^-1之间。结果表明，木材物种有效热导率的实验值更接近于平行模型的值。在木材的结构中，垂直于纤维轴出现的射线和薄壁组织的存在使得难以具有直相关性。这表明穿过木材基体的热通量遵循与每种木材的微观结构特征相关的非常复杂的道路。这些结果对于预测节能和建筑能源计量方面的可持续能源技术的未来发展具有重大贡献。