Correlations for the viscosity of 2,3,3,3-tetrafluoroprop-1-ene (R1234yf) and trans-1,3,3,3-tetrafluoropropene (R1234ze(E))

Abstract

Due to concerns about global warming, there is interest in 2,3,3,3-Tetrafluoroprop-1-ene (R1234yf) and trans-1,3,3,3-Tetrafluoropropene (R1234ze(E)) as potential replacements for refrigerants with high global warming potential (GWP). In this manuscript we survey available data and provide viscosity correlations that cover the entire fluid range including vapor, liquid, and supercritical regions. The correlation for R1234yf is valid from the triple point (220 K) to 410 K at pressures up to 30 MPa, and the correlation for R1234ze(E) is valid from the triple point (169 K) to 420 K at pressures up to 100 MPa. The estimated uncertainty for both correlations at a 95 % confidence level is 2 % for the liquid phase over the temperature range 243 K to 363 K at pressures to 30 MPa, and 3 % for the gas phase at atmospheric pressure.

Viscosity and Density of a Polyol Ester Lubricating Oil Saturated with Compressed Hydrofluoroolefin Refrigerants

“…For instance, the isothermal compressibility of pure saturated liquid R-1234yf at 298.15 K is only 0.0069 (MPa –1 ; NIST REFPROP v.10.0 database). Regarding the pure HFO components, published Equations of State (EoS) where applied for the pure component specific volumes. , Additionally, dynamic viscosity models for pure R-1234yf and R-1234ze­(E) have been already published and were adopted herein. , These EoS and viscosity models are the standard for the refrigeration industry and can be leveraged using NIST REFPROP v.10.0 database…”

Horizontal convective boiling of R1234yf, R134a, and R450A within a micro-fin tube

“…Some of the of cause of the 50%overprediction by the modified Hamilton et al (2008) correlation for the R1234yf and R450A fluids may be due to a marginally larger uncertainty in the thermodynamic and transport fluid property predictions for these relatively new refrigerants as compared to R134a. For example, a recently developed viscosity correlation for R1234yf by Huber and Assael (2016) gives a viscosity that is approximately 3% larger than that given by REFPROP (Lemmon et al, 2013) in Table 2 for 277.6 K. However, even if it were assumed that the actual values for the liquid thermal conductivity, the liquid viscosity, and the critical pressure were 20% less, 10% less, and 10% greater than those provided by REFPROP, then the over prediction of the Hamilton et al (2008) model would be reduced by only approximately 10%. Consequently, it is believed that it is not likely that errors in property predictions contribute significantly to the heat transfer overprediction.…”

Reference Correlation for the Viscosity of Ammonia from the Triple Point to 725 K and up to 50 MPa

“…Most recently this method has been used to obtain correlations for the viscosity of R161, 1 n-undecane, 3 and R1234yf and R1234ze(E). 2 In the present work, we restricted the operators to the set (+,-,*,/) and the operands (constant, T r , ρ r ), with T r = T / T c and ρ r = ρ / ρ c . In addition, we adopted a form suggested from the hard-sphere model employed by Assael et al, 66 Δ η ( ρ r , T r )=(ρ r 2/3 T r 1/2 ) F ( ρ r , T r ), where the symbolic regression method was used to determine the functional form for F ( ρ r , T r ).…”

“…In a series of recent papers, reference correlations for the viscosity of refrigerants 1, 2 and also selected common hydrocarbon fluids 3–7 have been developed that cover a wide range of temperature and pressure conditions, including the gas, liquid, and supercritical phases. In this paper, the methodology adopted in the aforementioned papers is extended to developing new reference correlations for the viscosity of ammonia, a fluid very important for agricultural fertilizer production and also as a refrigerant.…”