【摘要】 一个具有 1 9个参数的半经验状态方程 ,可以很容易地转化为关于体积的多项式方程 ,应用起来十分方便。对于气体和超临界流体 ,该方程可以在很宽的温压范围内保持较高的精度。用该方程计算 H2 O、CO2 、CH4、H2 、CO、O2 等流体的 p VT关系 ,结果令人满意。在从常温常压直到 4 0 0 0～ 50 0 0 K和 90～ 60 0 GPa的范围内 ,预测的体积误差为 :平均偏差小于 1 % ,最大偏差小于 6% ,标准偏差小于 1 .5%。更多还原

【Abstract】 A semi empirical equation of state (EOS) with 19 parameters for pure geofluids is developed. It can be transformed into a polynomial of volume very easily, so it is easy to use. This EOS remains to be valid for the pVT properties of pure gases and supercritical fluids in very great temperature and pressure ranges with high precision. The pVT properties of H 2O,CO 2,CO,CH 4,H 2,O 2, etc. in the range from usual temperature and pressure up to 4,000～5,000 K and 90～600 GPa are calculated with the EOS, and the results are very satisfactory. The deviation of predicted volumes: average deviation is less than 1%, the maximum deviation less than 6 0%, and the standard deviation less than 1 5%.更多还原