利用木材热物理参数3个理论表达式分别计算28种木材的比热容、导热系数和导温系数,并分别与同条件下的实测值相比较.结果表明:28种木材理论计算的平均误差分别为2.6%、5.7%、6.7% ;最大误差分别为8.0%、12.8%、12.5%.木材热物理常数3个理论表达式都不是通常依据试验数据拟合成的经验方程式,而是依据统计力学和物理学原理,经过数学推导得到的理论表达式,使之学术上具有内在的理论意义.%Theoretical equations, derived from statistical thermodynamics and analogy, were used to calculate specific heat, thermal conductivity and thermal diffusivity of 28 types of wood. Then the results were compared with experimental values to verify the accu-racy of the new equations. Results showed that mean errors for above-mentioned parameters were 2.6%, 5.7% and 6.7% respective-ly, and maximum errors were 8.0%, 12.8% and 12.5% respectively. These data were all less than results from empirical equations. Different from empirical Maclean and Gu-Audrey equations that were based on experimental results mostly, derivation method that combines microscopic and macroscopic theories may be applied in other parameter prediction and subjects.
展开▼
