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Title: Testing Of The GERG-2004 Equation Of State A Wide-Range Reference For Natural Gases
Author: m. Jaeschke
Source: American Gas Association 2005
Year Published: 2005
Abstract: Thermodynamic properties of the main component of natural gas, methane, and of natural gases have frequently been investigated because of their industrial importance. The most recent equation of state for thermodynamic properties of methane was reported by Wagner and de Reuck 1. The equations of state for natural gases by Jaeschke et al. 2,3 (GERG88 equation) and by Starling and Savidge 4 (AGA8-DC92 equation) are now routinely applied in energy billing. They are the current internationally accepted standards for density or compression factor calculations under pipeline conditions 5. With the help of these equations the volume metered under varying, actual field conditions is converted to welldefined reference conditions.

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