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对 HFC- 2 2 7ea沿饱和线液相粘度和气相导热系数进行了实验研究。用改进型毛细管粘度计在 2 6 3.15～34 3.15 K的温度范围内沿饱和线实测了液相 HFC- 2 2 7ea粘度 ,实验结果的不确定度约在± 3%以内 ,并提供了相应的粘度与温度的方程式。作者还用瞬态热线法测得了温度从2 5 9.2 8～ 34 1.73K和压力从 81.5 9～ 12 89.76 k Pa的气相HFC- 2 2 7ea导热系数 ,其不确定度在± 1%以内 ,提供了HFC- 2 2 7ea气相区导热系数方程式 ,并外推确定了 HFC-2 2 7ea饱和气和稀薄气体的导热系数。这些输运物性数据和方程式的获得 ,为 HFC- 2 2 7ea的应用及环保制冷剂的开发提供了可靠的基础。
The viscosity of liquid phase and the thermal conductivity of HFC-2 2 7ea along the saturated line were experimentally studied. The viscosity of the liquid phase HFC-2 2 7ea was measured along the saturation line using a modified capillary viscometer in the temperature range of 26.315-34 3.15 K with an experimental result uncertainty of within ± 3% and a corresponding Equation of viscosity and temperature. The authors also used the transient hot-wire method to measure the thermal conductivity of HFC-2 2 7ea gas at temperatures ranging from 25 5-2 8 to 34 1.73 K and pressures from 81.5 9 to 12 89.76 kPa with an uncertainty of ± 1% The thermal conductivity equation of HFC-2 2 7ea gas phase region was derived and extrapolated to determine the thermal conductivity of HFC-2 2 7ea saturated gas and lean gas. The availability of these transport properties and equations provides a sound basis for the application of HFC-2 2 7ea and the development of environmentally friendly refrigerants.