Impact of oil presence on the evaporator enthalpy working with R1234ze(E) and R1234yf

Sun, Yanjun; Wei, Qiming; Wang, Jian; Wang, Xiaopo; He, Maogang

doi:10.1016/j.ijrefrig.2021.05.004

Cited by 6 publications

(13 citation statements)

References 10 publications

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“…Knowing the temperatures and pressures of viscosity measurements, we find the mole-fraction solubilities of R1234yf or R1234ze(E) in POE85 by our previous work. 17 Thus, the viscosities of saturated R1234yf/POE85 and R1234ze(E)/POE85 solutions can be obtained at different temperatures and pressures. Tables 4 and 5 list the viscosities of POE85 saturated with R1234yf and R1234ze(E) between 303.15 348.15 K, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…b x: the mole fraction of R1234yf absorbed in POE85 oil, which is calculated using our previously published data. 17 The combined expanded uncertainties U c are U c (T) = 0.03 K, U c (p) = 2.0 kPa, U c,r (x) = 3.0%, and U c,r (η) = 5.0% with a 0.95 level of confidence (k = 2). 19 the viscous fluid should flow at the laminar state in the capillary.…”

Section: Viscosity Measurementmentioning

confidence: 98%

“…Solubilities of R1234yf and R1234ze(E) in POE85 have been reported in our previous paper. 17 On the basis of measured solubility data, viscosities of POE85 oil with R1234yf and R1234ze(E) between 303.15 and 343.15 K are presented in this work.…”

Section: Introductionmentioning

confidence: 99%

“…Morais et al , studied the solubilities, diffusivities, and viscosities of R1234yf and R1234ze(E) with POE32 from 248.15 to 348.15 K. R1234ze(E) is more soluble in POE32 than R1234yf. Our group − has systematically studied the absorption of R1234yf and R1234ze(E) in POE and PECs. Meanwhile, we discussed the influence of the PEC molecular structure, pressure, and temperature on the absorption behavior of HFO/oil mixtures.…”

Section: Introductionmentioning

confidence: 99%

“…The pressure of the equilibrium cell was measured using a Rosemount pressure transducer (FS 5500 kPa, 0.025%FS). Based on the measured temperatures and pressures, the solubilities can be calculated by the NRTL model given in our previous work 17. After that, the saturated solution was transferred to the self-designed capillary viscometer by the constant-flux pump (±0.01 mL•min −1 ).…”

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confidence: 99%

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Measurement and Correlation for the Viscosity of R1234yf/POE85 and R1234ze(E)/POE85 Solutions

et al. 2022

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Owing to zero ozone depletion potential (ODP) and extremely low global warming potential (GWP), 2,3,3,3tetrafluoroprop-1-ene (R1234yf) and trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) as most potential refrigerants have attracted much interest in refrigeration and air conditioning (RAC). For a better insight into the refrigeration performance using R1234y and R1234ze(E) as refrigerants, the thermophysical properties of refrigerant/lubricant blends should be well understood, especially the viscosities of the refrigerant/lubricant blends. Using a selfdesigned-capillary apparatus, the viscosity measurements were performed for blends of POE85 oil saturated with R1234y and R1234ze(E) between 303.15 and 343.15 K. Viscosities of both R1234yf/POE85 and R1234ze(E)/POE85 have a similar trend. With an increase in solubility, the viscosity plunges dramatically at the beginning and then drops slowly. The results indicate that the refrigerant dissolved in oil has a large impact on the lubricant viscosity. The experimental data were successfully correlated by Eyring's absolute rate theory coupled with modified two-suffix-Margules (Eyring-MTSM model).

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Section: Resultsmentioning

confidence: 99%

Section: Viscosity Measurementmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%