Viscosity and Density of a Polyol Ester Lubricating Oil Saturated with Compressed Hydrofluoroolefin Refrigerants,Journal of Chemical & Engineering Data

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Viscosity and Density of a Polyol Ester Lubricating Oil Saturated with Compressed Hydrofluoroolefin Refrigerants
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2020-08-07 , DOI: 10.1021/acs.jced.0c00431
Ana Rita C. Morais ₁ , Luke D. Simoni ₂ , Mark B. Shiflett _{1,

3} , Aaron M. Scurto _{1,

3}

Affiliation

Hydrofluoroolefins (HFOs) are currently being developed to replace hydrofluorocarbons (HFCs) with high global warming potential (GWP) in air-conditioning and refrigeration systems. The development of low-GWP HFOs requires detailed knowledge of the key thermophysical properties of these refrigerants with commonly used lubricating oils at varying operational conditions. The liquid-phase dynamic viscosity and density data for a synthetic polyol ester lubricating oil (ISO VG 32) saturated with compressed 2,3,3,3-tetrafluoropropene (R-1234yf) and trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)) were measured over temperatures ranging from 248.15 to 348.15 K and pressures up to 0.6 MPa. The liquid compositions for the viscosity and density data were calculated using previously measured vapor–liquid equilibrium data and models. The liquid phase viscosity decreased significantly with increased composition of the refrigerant. The experimental viscosity and density obtained for each refrigerant and lubricating oil system were successfully correlated using Redlich–Kister expansions for excess volume and “excess viscosity”. From the data and modeling, the kinematic viscosities were calculated and Daniel plots were generated. In addition, the previously measured diffusivities for each HFO/ISO VG 32 lubricating oil system were well correlated with the reported experimental viscosity data according to the Stokes–Einstein theory.

中文翻译：

压缩氢氟烯烃制冷剂饱和的多元醇酯润滑油的粘度和密度

当前正在开发氢氟烯烃（HFO），以替代空调和制冷系统中具有较高全球变暖潜能（GWP）的氢氟烃（HFC）。低全球升温潜能值HFO的发展需要对这些制冷剂和常用润滑油在不同的运行条件下的关键热物理性质的详细了解。压缩2,3,3,3-四氟丙烯（R-1234yf）和反式饱和的合成多元醇酯润滑油（ISO VG 32）的液相动态粘度和密度数据在248.15至348.15 K的温度和最高0.6 MPa的压力下测量了-1,3,3,3-四氟丙烯（R-1234ze（E））。使用先前测得的气液平衡数据和模型来计算液体的粘度和密度数据。随着制冷剂组成的增加，液相粘度显着降低。使用Redlich-Kister膨胀法针对过量制冷剂和“过量粘度”成功地关联了每种制冷剂和润滑油系统的实验粘度和密度。从数据和建模中，计算出运动粘度，并生成了丹尼尔图。此外，

更新日期：2020-09-10

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