Almajose-Dalida EOS | Generalized correlations for alpha functions
Almajose-Dalida EOS | Generalized correlations for alpha functions
Nakalista sa baba ay mga generalized alpha function correlations applicable to the Almajose-Dalida equation of state.
The Soave-alpha is a single-parameter vapor pressure function defined as:
Original Soave-alpha correlation
The following equations are new correlations designed to increase the thermodynamic consistency of the alpha function at large temperature ranges. These equations have been derived using the enforced thermodynamic consistency methods described by these datasets.
Nonpolar, light compounds
Nonpolar, heavy compounds
Polar, light compounds
Polar, heavy compounds
The Heyen-alpha is a two-parameter exponential vapor pressure function defined as:
The Heyen-alpha has the advantage of being thermodynamically consistent as long as both parameters are positive and 𝜏₂ ≤ 1.00. Correlations available are as follows:
Generalized correlations
The Heyen correlations were developed with specialization based on molecular similarity. The following available correlations enhance thermodynamic fidelity for the generalized Heyen-alpha:
Hydrocarbons, simple compounds
Refrigerants, halogenated compounds
Acids, alcohols, ketones, oxygenated compounds
The Twu-alpha is a two-parameter exponential-power vapor pressure function defined as:
The Twu 2P-alpha has the advantage of being thermodynamically consistent as long as both parameters are positive and 𝜏₂ ≤ 0.8909. Correlations available are as follows:
Generalized correlations
The Twu-2P correlations were developed with specialization based on molecular similarity. The following available correlations enhance thermodynamic fidelity for the generalized Twu 2P-alpha:
Hydrocarbons, simple compounds
Refrigerants, halogenated compounds
Acids, alcohols, ketones, oxygenated compounds
Last edited: October 29, 2025