Call Alpha0GERG (T,D,x,a0) c Calculate the real gas Helmholtz energy, and its derivatives with respect to temperature and/or density.

(DOI: 10.1021/JE300655B) A new equation of state for the thermodynamic properties of natural gases, similar gases, and other mixtures, the GERG-2008 equation of state, is presented in this work. This equation is an expanded version of the GERG-2004 equation. GERG-2008 is explicit in the Helmholtz free energy as a function of density, temperature, and composition.

Equation Of State GERG 2008 running directly from your browser. Translation of the Eric Lemmon work from NIST.

2012年10月31日 · A new equation of state for the thermodynamic properties of natural gases, similar gases, and other mixtures, the GERG-2008 equation of state, is presented in this work. This equation is an expanded version of the GERG-2004 equation. GERG-2008 is explicit in the Helmholtz free energy as a function of density, temperature, and composition.

A group of European gas companies, GERG, supported the development of a new equation of state for the thermodynamic properties of natural gases covering the gas and liquid region including the vapour-liquid phase equilibrium.

Multifluid model for the equation of state GERG-2008 for natural gases and similar mixtures. Three elements are necessary to set up a multi-fluid mixture model: The reducing functions as well as the departure function were developed to describe the behaviour of the mixture and contain substance and mixture specific parameters.

2000年10月27日 · The European Gas Research Group, GERG (Groupe Européen de Recherches Gazières), has undertaken an R&D project with the aim of increasing the general knowledge about, and advancing the technology on, the concept of multipath ultrasonic transit time flow meters (USM) for fiscal, allocation and sales metering of natural gas.

The GERG-2004 project (Groupe Européen de Recherches Gazières) created a mathematical model for natural gas and similar mixtures, in which the main components are represented by Wagner–Setzmann (WS), Jacobsen–Stewart (JS) or Wagner–Span (WSsh) equations.

2016年5月17日 · The GERG-2008 equation is the result of joined efforts among European gas companies (G roup E uropeén de R echerches G azières) to develop a more accurate equation of state for natural gas mixtures (Kunz and Wagner, 2012).

V Contents Nomenclature X 1 Introduction 1 2 Previous Equations of State for Mixtures 4 2.1 Examples of Equations of State Commonly Applied in the