The present study analyzes the accuracy of some equations of state for determining the volumetric properties, towards fluids characterized by a different degree of acentricity and polarity. The examined equations are the Cubic equations of state (van der Waals, Redlich-Kwong, Redlich-Kwong-Soave and Peng-Robinson), the Lee-Kesler method and the Virial equation. The substances considered in this study are argon, which is a simple fluid, characterized by negligible values of the acentric factor and dipole moment, some light hydrocarbons and water, which has a strong dipole moment and high acentricity. The analysis shows that the Lee-Kesler method provides the best results for all the substances considered. Except for water, the mean errors are quite little, mostly lower than 1-2% in all the examined regions of a thermodynamic diagram, while in the case of water, the errors can be ever greater than 20%.

Accuratezza di alcune equazioni di stato / Ayr, Ubaldo. - (2004), pp. 1697-1708. (Intervento presentato al convegno 59° Congresso Annuale ATI tenutosi a Genova nel 14-17 settembre 2004).

Accuratezza di alcune equazioni di stato

AYR, Ubaldo
2004

Abstract

The present study analyzes the accuracy of some equations of state for determining the volumetric properties, towards fluids characterized by a different degree of acentricity and polarity. The examined equations are the Cubic equations of state (van der Waals, Redlich-Kwong, Redlich-Kwong-Soave and Peng-Robinson), the Lee-Kesler method and the Virial equation. The substances considered in this study are argon, which is a simple fluid, characterized by negligible values of the acentric factor and dipole moment, some light hydrocarbons and water, which has a strong dipole moment and high acentricity. The analysis shows that the Lee-Kesler method provides the best results for all the substances considered. Except for water, the mean errors are quite little, mostly lower than 1-2% in all the examined regions of a thermodynamic diagram, while in the case of water, the errors can be ever greater than 20%.
2004
59° Congresso Annuale ATI
88-86281-93-5
Accuratezza di alcune equazioni di stato / Ayr, Ubaldo. - (2004), pp. 1697-1708. (Intervento presentato al convegno 59° Congresso Annuale ATI tenutosi a Genova nel 14-17 settembre 2004).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/14177
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