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Publication
The density of environmentally acceptable refrigerants and their mixtures: its measurement, correlation and estimation.
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Advisor(s)
Abstract(s)
The density of liquid refrigerants is very important for the design of compression cycles in the refrigeration and air-conditioning industries. The density of pure liquids as well as binary mixtures proposed as alternatives to the chlorofluorocarbons (CFCs) [the hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs)] is not well known, in spite of some international effort in recent years to measure them. Some of the methods of easurement, correlation and estimation of the densities of pure HCFCs, HFCs and binary mixtures are reviewed. The correlation of the densities is based on the hard-sphere - DeSantis equation of state (HSDS), the misture being assumed to obey a 1-fluid approach. The equation is shown to be universal for pure fluids and suitable for estimating their densities within 1% for T/Tc < 0.9, where Tc is critical temperature, for both Class B and Class A refrigerants. The estimation scheme was extended to binary mixtures, using only pure component properties and combination rules for 'pseudo' critical parameters, with the same uncertainty.
Description
Copyright © 1996 a Pion publication.
Keywords
Correlation Density Estimation Measurements Mistures Refrigerants
Citation
Fialho, P., Sousa, A., Nieto de Castro, C. N. (1995/1996). "The density of environmentally acceptable refrigerants and their mixtures: its measurement, correlation, and estimation". «High Temperatures-High Pressures», 27/28(5): 569-582. http://dx.doi.org/doi:10.1068/hte10.
Publisher
Pion