Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Importance of Including the Liquid Phase in Equations of State for Nonazeotropic Refrigerant Mixtures.

Published

Author(s)

G. Morrison

Abstract

The recent surge of interest in nonazeotropic refrigerant mixtures has generated a need for correlation and prediction of liquid phase information for mixture. We show that the ideal mixture assumption (the linear weighting of pure liquid properties) can be useful but can also be seriously in error when one of the components is near its critical point, even when the mixture is not near its own critical point. We also suggest that using spline-fits to data in isolation is an ineffective way of using such information. A physical model is suggested for a mixture whose equation of state incorporates all the departures of the mixture from ideality, which allows small, isolated sets of data to be used in predicting other physical properties of both the pure fluids and their mixtures.
Citation
ASHRAE Transactions
Volume
91
Issue
No. 1B

Keywords

refrigerants, equations, mixtures, liquid phases, liquids, thermodynamics

Citation

Morrison, G. (1985), Importance of Including the Liquid Phase in Equations of State for Nonazeotropic Refrigerant Mixtures., ASHRAE Transactions, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910768 (Accessed June 23, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created January 1, 1985, Updated June 2, 2021