Modeling Bubble Points of Mixtures of Hydrofluorocarbon Refrigerants and Polyol Ester Lubricants
Marcia L. Huber, E W. Lemon, Daniel G. Friend
We use a Helmholtz mixing model to predict the bubble point pressures of mixtures of hysrofluorocarbon refrigerants and polyol ester (POE)-based lubricants. We have used this model successfully in the past for mixtures of refrigerants. In this work, we extend the model to include mixtures of refrigerants with polyol ester lubrints. This model has the advantage of incorporating the best available equations of state for the refrigerants. It is valid over the entire composition range and is not limited to states below the refrigerant critical temperature. The model can represent volumetric properties in addition to calculating reliable phase equilibria. As part of the approach, we also developed a set of generalized equations that can be used to apply the simplified SAFT equation of state to polyol ester-based lubricants. We compare the predictions of the model with selected experimental data for bubble points available in the literature.
Properties and Phase Equilibrai for Product and Process Design, International Conference | 9th | | Elsevier
bubble point, density, lubricant, refrigerant, vapor-liquid equilibria
, Lemon, E.
and Friend, D.
Modeling Bubble Points of Mixtures of Hydrofluorocarbon Refrigerants and Polyol Ester Lubricants, Properties and Phase Equilibrai for Product and Process Design, International Conference | 9th | | Elsevier, Kurashiki, JA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=831702
(Accessed November 28, 2023)