常见热力学模型对馏分油加压汽液平衡计算的适用性──孤岛、中原、克拉玛依原油

Verification the Predication Accuracy of Usual Vapour-liquid Equilibrium(VLE)Modles──Gudao,Zhongyuan and Kelamayi Oils

依据孤岛、中原、克拉玛依原油馏分油压力下（０．４９３～１．４７４ＭＰａ）２２８个窄馏分汽液相平衡常数，回归出Ｋ值关联式，该式对泡点温度预测的绝对平均偏差为４．７℃。根据实测数据，对常用热力学模型（ＳＲＫ、ＳＨＢＷＲ、ＣＳＧＳ）进行了适用性考察。结果表明，ＳＲＫ方程预测精度最高，其对温度预测的绝对平均偏差为８．６℃，对Ｋ值预测的平均绝对相对偏差为８．７％。

Presents a correlation equation of VLE constants(K_i)for 228 narrow fractions VLE contants under the pressure in the range of 0.473～1. 474kPa of Gudao,Zhongyuan and Kelamayi oils,The equations has the mean absolute deviation of 4.7℃for equilibrium temperature.Based on the experiment data,the ususal VLE modles which are concerned with Soave and SHBWR state equations,Grayson Streed and Chao-Seader general correlations are cheaked for mentioned oils.It is showed that Soave equation has the most accuracy than other modles.Soave equation has the absolute mean percentage deviation of 8.7%for K_i and has the mean absolute deviation of 8.6℃ for equilibrium temperature.