An empirical equation for the gas compressibility factor, Z

被引：3
|
作者：
Towfighi, Sohrab [1 ]
机构：
[1] Univ Toronto, Fac Med, Toronto, ON, Canada
来源：
PETROLEUM SCIENCE AND TECHNOLOGY | 2020年 / 38卷 / 01期
关键词：
compressibility factor; correlation; equation of state; Levenburg-Marquardt; symbolic regression; OF-STATE;
D O I：
10.1080/10916466.2019.1655445
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
An empirical equation is presented for the gas compressibility factor, Z, as a function of reduced temperature and reduced pressure. The average error of the equation is 2.5%, median error is 1.3%, and the coefficient of determination (R-2) is 0.98. The equation is presented in a manner ready for use in software code. Comparison is made to the traditional generalized compressibility factor chart. The equation was found using genetic programing for symbolic regression coupled with the Levenburg-Marquardt algorithm for fitting-parameter optimization.
引用
收藏
页码：24 / 27
页数：4
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