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Prediction of solubility for HFC working fluids in model substances for compressor oils
Author(s) -
Wahlström åsa,
Vamling Lennart
Publication year - 1997
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450750309
Subject(s) - unifac , uniquac , thermodynamics , solubility , gas compressor , binary number , chemistry , materials science , activity coefficient , mathematics , organic chemistry , physics , non random two liquid model , aqueous solution , arithmetic
This study is a first step towards the prediction of the behaviour of working fluids and compressor oils. Different thermodynamic models are investigated and a modified Flory‐Huggins‐based predictive model, termed MFH , is proposed for solubility of HFCs in long‐chained hydrocarbons. From experimental data, 7 general parameters have been fitted for the MFH model to describe 14 binary systems. The UNIQUAC model demands 28 specific parameters without the possibility of extending their validity to other mixtures. A predictive UNIFAC model requires 8 general parameters, but its uncertainty, 17%. is poor compared to the MFH model's 7%.