Thermal Science 2015 Volume 19, Issue 4, Pages: 1293-1296
https://doi.org/10.2298/TSCI1504293Y
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Viscosity prediction of refrigerants under subcritical/supercritical conditions
Yue Hong-Ya (Ministry of Education, Xi’an Jiaotong University, Key Laboratory of Thermo-Fluid Science and Engineering, Xi’an, China)
Liu Zhi-Gang (Ministry of Education, Xi’an Jiaotong University, Key Laboratory of Thermo-Fluid Science and Engineering, Xi’an, China)
Viscosity is an important thermophysical property of fluids. Viscosities of
refrigerants were predicted based on friction theory combined with the Lemmon
and Span short reference equation of state. This model is valid for the
temperature up to 397 K and pressure up to 40 MPa, which cover both the
subcritical and supercritical regions. Experimental data were further used to
validate the model. Under all test conditions, the accuracy is better than
6%, which is acceptable in most practical applications.
Keywords: refrigerants, viscosity, friction theory