The 10 basis functions in the generalised departure function used by the GERG-EOS for several binaries including (CH4+C4H10) were examined to eliminate the term causing a divergence between measured and predicte
Equations of State (EoS) are commonly used to describe phase equilibrium and physical properties over a wide range of pressure, temperature and mixture composition. As classical cubic EoS models do not satisfy the demands on the accuracy of some thermodynamic properties over the entire region of ...
当样品中含有较多惰性或重质组分时，两种方法的精度差别不明显。关键词AGA8-DC92；GERG-2008；天然气密度；计算精确度 Comparison of Accuracy of Calculating Natural Gas Density Using AGA8-DC92and GERG-2008EOS Ye Zhe Zhejiang Zheneng Natural Gas Operation Limited Company (Hangzhou,Zhejiang 310052,China)Ab...
large deviations between the GERG-2008 EOS predictions and accurate experimental measurements are known to occur. (In this work, x 1 denotes the mole fraction of methane and the term ‘‘bu- tane” refers to the isomer often called normal butane). In the development of the GERG-2008 EOS ...
This is to our knowledge the first time that the GERG-2008 EOS has been compared to standard Z-factor correlations for such a large number of data points.If compositional information is available, we recommend using either the GERG-2008 model or the Hall-Yarborough model with pseudo-...
Historically, the AGA8 equation of state (EOS) is widely used for such conversion. Recently, a new equation of state (GERG 2008) was presented by European Gas companies for natural gas thermodynamic properties calculation. The main objective of the current study is to present a comparison ...
The GERG-2008 Equation of State (EOS) was implemented into this model through User Defined Functions (UDF) to predict the thermodynamic properties of CO2mixtures. The model predictions were in good agreement with the experimental data of two 'shock tube' tests. A range of representative CO2...
In other words, simply by utilizing the GERG2008 EOS (instead of AGA8 EOS), the buyer benefits.doi:10.1016/j.jngse.2018.07.014Farzaneh-Gord MahmoodMohseni-Gharyehsafa BehnamToikka AlexanderZvereva IrinaJournal of Natural Gas Science and Engineering...
Comparing the calculated Z-factor and measured value of previous studies show that the accuracy of GERG2008 EOS is higher than AGA8 for all studied range of pressure and temperature and for various composition ranges. Results also show that GERG2008 equation of state predicts Z-factor higher ...