普通氢的体积转换的 Peng-Robinson 状态方程

Comprehensive and accurate thermophysical properties of normal hydrogen are the basis for research and in-depth application of hydrogen energy. In order to improve the prediction accuracy of the traditional cubic equation of state (EoS), the volume translation theory coupled with the Peng-Robinson EoS was applied to improve the saturated liquid phase and supercritical fluid density. The volume -translated Peng-Robinson (VTPR) equation proposed is comparable to the multiparameter Helmholtz EoS. The application range of the model is from the triple point temperature to 1 000 K, and the pressure is lower than 100 MPa. This VTPR model has a certain degree of extrapolation for the direction of high temperature and pressure - Calculation accuracy can meet the needs of practical engineering applications.