Abstract Positive displacement expanders are widely investigated and theirs models commonly use the REFPROP database to evaluate fluid properties. However, estimating procedures in CFD using result heavy of CPU time. Therefore, a study has been carried out determine if simpler methods for property estimation suitable. The ANSYS CFX solver used includes number cubic equations state, namely, Redl...

The phase behavior of the carbon dioxide + cycloheptane binary system for which no literature data are available has been examined at temperatures ranging from 292.6 to 372.8 K. Saturation pressures, 23.9 154.8 bar, were acquired by a synthetic and visual method. In concrete terms, an adjustable-volume high-pressure cell was utilized measure bubble dew point pressures detection transitions cons...

La capacitŽ des Žquations d'Žtat (EoS) cubiques pour corrŽler et prŽdire les Žquilibres de phases en conditions hyperbares est analysŽe. Les donnŽes PVT de corps purs ainsi que les donnŽes d'Žquilibres liquide-vapeur (VLE) et volumŽtriques pour des mŽlanges binaires, jusqu'ˆ 2000 bar sont utilisŽes. Les rŽsultats des corrŽlations et des prŽdictions sont prŽsentŽs pour l'Žquation de Peng-Robinso...