Measurement Library

PRCI Publications (1997)


NGXLNGD-R01 A Comparison of Mathematical Models for the Prediction of LNG Densities
Author(s): Robert McCarty
The purpose of this study was to optimize and compare several different mathematical models using the experimentally determined PVTx density data of Haynes, et al. (1976), Haynes and Hiza (1976), Hiza, et al. (1976), and Hiza (1976). These data are for the liquid phase of methane, ethane, propane, normal butane, isobutane and nitrogen, and various mixtures thereof. The temperature range of the correlations was limited (95-150 K) and the pressures to those of saturation, the range of which was about 0 to 20 atmospheres. The goals of the study were to produce one or more computer models which would predict a density of LNG (liquefied natural gas) to within 0.1% of the true value when the temperature, pressure, and composition of the LNG are specified.

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