A refrigerant mixture of R1123 + R32 is expected to be an alternative working fluid for refrigeration systems, organic Rankine cycle and heat pumps due to its lower global warming potential and transport properties. The goals of this work are to measure the viscosity of the liquid and vapor phases of this mixture refrigerant. Consequently, the viscosity of mixture refrigerant was measured by the tandem capillary tube method up to 4.5 MPa over a temperature range from 250.64 K to 312.61 K for the liquid phase and from 323.35 K to 382.88 K in the vapor phase, respectively. Mass fractions of measured R1123/R32 refrigerant mixture were 0.428/0.572 in the liquid phase and 0.425/0.575 in the vapor phase. The obtained experimental data were compared with estimated values of the ECS model, and the average absolute deviation (AAD) was found at 3.63 % in the liquid phase and 2.45 % of the vapor phase. Also, the measured liquid and vapor viscosity data were correlated with the Grunberg–Nissan method and Wilke mixture correlation, respectively, while the AAD was 1.33 % for liquid and 3.69 % for vapor phases. The total combined standard uncertainties in the liquid and vapor viscosity measurements were estimated to be less than 2.9 % and 3.0 %, respectively.

中文翻译：

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用串联毛细管法测量 R1123 + R32 制冷剂的二元混合物的粘度

R1123 + R32 的制冷剂混合物由于其较低的全球变暖潜势和运输特性，有望成为制冷系统、有机朗肯循环和热泵的替代工作流体。这项工作的目标是测量这种混合制冷剂的液相和气相的粘度。因此，通过串联毛细管法在 250.64 K 至 312.61 K 的液相温度范围和 323.35 K 至 382.88 K 的气相温度范围内测量了高达 4.5 MPa 的混合制冷剂的粘度。测得的 R1123/R32 制冷剂混合物的质量分数在液相中为 0.428/0.572，在气相中为 0.425/0.575。将得到的实验数据与ECS模型的估计值进行比较，发现平均绝对偏差（AAD）为3。63% 为液相，2.45% 为气相。此外，测得的液体和蒸气粘度数据分别与 Grunberg-Nissan 方法和 Wilke 混合物相关性相关，而 AAD 为液体的 1.33% 和蒸气相的 3.69%。液体和蒸汽粘度测量的总标准不确定度估计分别小于 2.9% 和 3.0%。