关键词: 标准氢, 热导率, 关联

Abstract:

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.

Key words: 标准氢, 热导率, 关联