主要运用了Burnett法原理搭建了高精度PVT实验台,对新型环保混合制冷剂R290/R1234ze(E)进行了热物性测试。实验中控制温度为260.15~320.15K,测定了质量分数分别为80%/20%和75%/25%混合制冷剂R290/R1234ze(E)的PVT性质。实验装置的压力...主要运用了Burnett法原理搭建了高精度PVT实验台,对新型环保混合制冷剂R290/R1234ze(E)进行了热物性测试。实验中控制温度为260.15~320.15K,测定了质量分数分别为80%/20%和75%/25%混合制冷剂R290/R1234ze(E)的PVT性质。实验装置的压力不确定度为±1 k Pa,温度不确定度为±10 m K,所测实验数据的相对误差都在1%之内。拟合出了相应温度与压力下该混合工质的密度与气体维里方程,为R290/R1234ze(E)作为新型替代制冷剂提供依据。展开更多
This paper reports the PVTx properties of R22/R152a system in the ranges of temperature from 298.15 K to 353.15 K and pressure from 0.288 MPa to 1.288 MPa. Sixty seven PVTx measurements for three compositions, i.e., 0...This paper reports the PVTx properties of R22/R152a system in the ranges of temperature from 298.15 K to 353.15 K and pressure from 0.288 MPa to 1.288 MPa. Sixty seven PVTx measurements for three compositions, i.e., 0.2712, 0.4094 and 0.7911 mole fraction of R22, have been measured along 16 isotherms. The uncertainties of temperature and pressure measurements are less than 0.01 K and ±500 Pa respectively. The reliability of the experimental measurements is confirmed by using REFPROP program, a computer program suggested by Morrison et al[4].展开更多
文摘主要运用了Burnett法原理搭建了高精度PVT实验台,对新型环保混合制冷剂R290/R1234ze(E)进行了热物性测试。实验中控制温度为260.15~320.15K,测定了质量分数分别为80%/20%和75%/25%混合制冷剂R290/R1234ze(E)的PVT性质。实验装置的压力不确定度为±1 k Pa,温度不确定度为±10 m K,所测实验数据的相对误差都在1%之内。拟合出了相应温度与压力下该混合工质的密度与气体维里方程,为R290/R1234ze(E)作为新型替代制冷剂提供依据。
文摘This paper reports the PVTx properties of R22/R152a system in the ranges of temperature from 298.15 K to 353.15 K and pressure from 0.288 MPa to 1.288 MPa. Sixty seven PVTx measurements for three compositions, i.e., 0.2712, 0.4094 and 0.7911 mole fraction of R22, have been measured along 16 isotherms. The uncertainties of temperature and pressure measurements are less than 0.01 K and ±500 Pa respectively. The reliability of the experimental measurements is confirmed by using REFPROP program, a computer program suggested by Morrison et al[4].
