Abstract: The BWR equation of state modified by Giorgio S. Soave in 1999 was applied to the saturated hydrogen solutions. The parameters needed in the equation of state were modified and optimized through fitting experiment data. p-V-T condition of the saturated hydrogen solutions as well as thermodynamic properties and phase equilibrium of hydrogen fluid can be accurately predicted with this equation. The mean relative error on vapor densities of H₂，D₂ and T₂ was 0.19905%，0.28173%，and 0.001295% respectively. The max relative deviation was -0.99511%,4.6664%, and -0.0040385% respectively. The mean relative error on liquid densities of H₂，D₂ and T₂ was 0.5504%，0.33704%，and 0.04703% respectively.The max relative deviation was 3.2950%，-2.2629%，and 0.12126% respectively. A rigorous thermodynamic model which can be used in simulation of hydrogen isotope-separation by cryogenic distillation was obtained.

Key words:

饱和氢, 状态方程, 热力学

摘要： 将Soave改进的BWR方程(1999年)应用于饱和氢流体，通过实验数据对方程的参数进行了选择和优化.此方程可用于饱和氢溶液气液两相p-V-T关系、热力学性质以及气液平衡关系的预测.对于H₂、D₂、T₂饱和流体，气相密度的平均相对误差分别为0.19905%、0.28173%、0.001295%，最大偏差分别为-0.99511%、4.6664%、-0.0040385%；液相密度的平均相对误差分别为0.5504%、0.33704%、0.04703%，最大偏差分别为3.2950%、-2.2629%、0.12126%，其准确性良好.可作为低温精馏分离氢同位素的一个严格的热力学模型.

关键词:

饱和氢, 状态方程, 热力学