The made products have low thermal conductivity factor and excellent dimensional stability. 制得的产品导热系数低,尺寸稳定性好。
Research on relationship between particle size distribution of energy storage paraffin and the conductivity factor of phase change energy storage composite gypsum board 石蜡储能颗粒粒度分布与相变储能复合石膏板导热系数的关系研究
The calculation formula of equivalent conductivity factor in free convection on annular space is determined. 通过试验确定了双重保温管道环行空间自然对流换热在低Cr.Pr数下当量导热系数的计算公式。
Utilizing method of function extremum, it is proved that there lies minimum coefficient heat transmission in sealed vertical air layer, that is to say there exists the minimum theoretical equivalent conductivity factor. 运用函数求极值的方法,证明了封闭垂直夹层中的传热系数存在极小值,即封闭垂直夹层在理论上存在最小的当量导热系数,并推导出了最佳空气夹层厚度的理论公式。
To enhance thermal-wear resistance of the mandrel, it is required to use mandrel material which has dispersed carbide, linear expansion factor of the base metal close to that of the chide film, minimum elastic modulus and maximum thermal conductivity factor. 为了提高芯棒的抗热损伤性能,应使芯棒材料的碳化物弥散化,基体金属与氧化膜的线胀系数相接近,弹性模量尽量低,热传导系数(CF)尽量高。