新的水导热系数方程  

New thermal conductivity equation for water

作　　者：许心皓[1] 段远源[1] 黄若涛[1] 杨震[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,北京100084

出　　处：《热科学与技术》2011年第4期301-304,共4页Journal of Thermal Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB219805)

摘　　要：全面搜集整理了国内外已公开发表的水导热系数的实验数据,并比较分析筛选出了其中可靠的实验数据点作为基准数据。在此基础上,通过多元回归分析和加权最小二乘拟合方法,建立了水的导热系数方程。对4 539个基准数据点的计算结果表明,方程的精度优于IAPWS推荐的现行水的导热系数方程,特别是在高温高压区和临界区,方程的描述精度比原方程有较大提高。All available experimental data sets on the thermal conductivity of H2O were collected, and reliable experimental data were selected on the basis of which the equation for the thermal conductivity of water substance was developed. The multiple regression analysis and weighted least squares methods were used to determine parameters of the equation. The calculation results on 4 539 experimental data points showed that the present equation have a better accuracy for the thermal conductivity of H20, especially in the region with high temperature and high, critical region

关 键 词：水 导热系数 高温高压区 临界区 

分 类 号：TK121[动力工程及工程热物理—工程热物理]