Four-Parameter Generalized Compressibility Charts for Nonpolar Fluids

[+] Author and Article Information
Jui Sheng Hsieh

Newark College of Engineering, Newark, N. J.

J. Eng. Ind 88(3), 263-273 (Aug 01, 1966) (11 pages) doi:10.1115/1.3670942 History: Received July 08, 1965; Online December 08, 2011


A series of five generalized compressibility charts for nonpolar and slightly polar substances in the gaseous and liquid states and in the two-phase region is presented. The charts are plots of the compressibility factor Z versus the reduced pressure Pr with the reduced temperature Tr as a parameter. Each chart is for a group of substances with similar values of the critical compressibility factor Zc and the slope of the reduced vapor-pressure curve at the critical point, αc . The use of four independent parameters (Pr , Tr , Zc , and αc ) results in an increase in accuracy over existing methods of presenting compressibility charts.

Copyright © 1966 by ASME
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