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- W1586173614 abstract "Mixed refrigerants R407C, R410A, R404A, and R507A have gained more and more importance in the last few years as a replacement for R22 and R502. New viscosity data of R404A, R407C, R410A, and R507A are presented. For all these refrigerants, the viscosity was measured for the saturated liquid and vapor and also for the superheated vapor. Viscosity was measured using a capillary tube method. Estimated uncertainties in experimental viscosities are, in general, less than or equal to ±1.2%. All available literature viscosity data for R404A, R407C, R410A, and R507A were evaluated to identify the most accurate data on which to base the viscosity model. The viscosity is modeled with the residual concept. In this representation, the viscosity was composed of two contributions: a dilute gas term which is a function only of temperature, and a residual term which is a function only of density. The models cover a wide range of parameters except for the small region of the critical viscosity enhancement which is extremely close to the critical point and may be safely ignored in all practical application. The resulting correlations applicable for the viscosity of dilute gas, superheated vapor, and saturated liquid and vapor of R404A, R407C, R41 OA, and R507 A are given. Comparisons are made for all available literature data. p Re T p 17 T/o Ll1]=TJ-1Jo Llc1J T/exp T/calc pressure Reynolds number temperature density viscosity NOMENCLATURE viscosity in zero-density limit residual viscosity critical viscosity enhancement experimental viscosity calculated viscosity Eighth International Refrigeration Conference at Purdue University, West Lafayette, IN, USAJuly 25-28, 2000 399" @default.
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- W1586173614 date "2000-01-01" @default.
- W1586173614 modified "2023-09-24" @default.
- W1586173614 title "Viscosity of Mixed Refrigerants, R404A, R407C, R410A, and R507C" @default.
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