Most Commonly Used Calculation Methods

These methods may be used for a wide variety of simulations, although no method is optimal for every application. The methods listed here are grouped by industry. The name for each system is derived from the Equilibrium K-value method. The table lists the methods used (by default) for five basic properties.

 

 

K-values

Enthalpy

Entropy

Vapor

Density

Liquid

Density

Oil Refining and Gas Processing

 

 

 

Soave-Redlich Kwong (SRK)

SRK

SRK

SRK

SRK

API

Peng-Robinson (PR)

PR

PR

PR

PR

API

Grayson-Streed (GS)

GS

CP

CP

SRK

API

SRK-Panagiotopoulos-Reid (SRKM)

SRKM

SRKM

SRKM

SRKM

API

 

Chemical Processing

 

Ideal

Vapor Pressure

Library

--

Library

Library

NRTL

 

NRTL

Library

--

Library

Library

UNIQUAC

 

UNIQUAC

Library

--

Library

Library

UNIFAC

UNIFAC

Library

--

Library

Library

 

Additional Information

Descriptions of the individual thermodynamic methods may be accessed from the Thermodynamic System - Modification Window by selecting the type of property, i.e., K-value, liquid enthalpy, etc., the method and pushing the Help button.

 

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Related Topics

Thermodynamics - General Information