标准氢的热导率方程

在广泛搜集标准氢(25%仲氢)热导率实验数据的基础上,运用单纯形算法拟合了标准氢的热导率计算方程.方程与实验数据的偏差一般在5.0%以内.结合工程应用实际,本文方程的适用范围为100-500 K,压力不超过150 MPa的区域.方程的不确定度为3.0%.方程具有一定的外推性,可以用于100 K以下或500 K以上的区域...

Thermal conductivity equation for normal hydrogen

In the study of hydrogen economy, the thermophysical properties of normal hydrogen are required to simulate a hydrogen system, including the thermodynamic properties, such as heat capacity and vapor pressure, and transport properties, such as thermal conductivity and viscosity.The thermal conductivity has a large effect on the heat transfer characteristics, which, in turn, greatly impact the cost and economic feasibility of the hydrogen system.Hence, a new equation for thermal conductivity of normal hydrogen(25% para hydrogen)is proposed by fitting extensive experimental data using a simplex method in this work.The deviations between the values calculated by the equation and the experimental data are generally less than 5.0%.The valid range of the equation is from 100 K to 500 K at pressures up to 150 MPa, and the uncertainty of the equation is estimated to be 3.0%. The extrapolation of the equation is reasonable, so the equation can be used at temperatures below 100 K or from 500 K to 1000 K at pressures up to 250 MPa.