Publication Type Journal Article
Title Viscosity measurements of compressed liquid refrigerant blend R-507A, using a vibrating-wire technique
Authors Helena Avelino João Fareleira Carla Oliveira
Groups MET
Journal JOURNAL OF CHEMICAL AND ENGINEERING DATA
Year 2008
Month January
Volume 53
Number 1
Pages 53-56
Abstract The refrigerant blend R-507A (50 wt \% HFC-143a, 50 wt \% HFC-125) is an azeotropic mixture of hydrofluorocarbon refrigerants, 1,1,1-tiifluoroethane (HFC-143a) and pentafluoroethane (HFC425). The paper reports viscosity measurements, performed with a vibrating-wire viscometer, of the refrigerant blend R-507A, at five temperatures in the range (253 to 293) K. The measurements were carried out at pressures from slightly above saturation up to 10 MPa, except for the isotherms at 253.26 K where the maximum pressure was 7.52 MPa and at 263.23 K where the maximum pressure was 7.09 MPa. The overall uncertainty of these measurements is estimated to be 1.0 \%. The data obtained were correlated by means of a modified hard-sphere based correlation technique. The root-mean-square deviation, rmsd, of the experimental results from the correlation equations is 0.23 \%, and their bias is not significant. This correlation method has also been used to interpolate and extrapolate the present results to enable comparisons with measurements performed by other authors of the viscosity of liquid R-507A at different temperatures and pressures.
DOI http://dx.doi.org/10.1021/je700345b
ISBN
Publisher AMER CHEMICAL SOC
Book Title
ISSN 0021-9568
EISSN
Conference Name
Bibtex ID ISI:000252292600010
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