当前位置: X-MOL 学术Int. J. Thermophys. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Vapor–Liquid Equilibrium Property Measurements for R32/R1234yf Binary Mixtures in Low R32 Concentration
International Journal of Thermophysics ( IF 2.5 ) Pub Date : 2020-10-15 , DOI: 10.1007/s10765-020-02752-2
T. Yamada , H. Miyamoto , N. Sakoda , Y. Higashi

This study obtained the precise measurements of the vapor–liquid equilibrium properties for R32/R1234yf binary mixtures, which are the key components for the next-generation refrigerant mixtures. To obtain the data more rapidly and precisely, two recirculation-type vapor–liquid equilibrium property measurement apparatuses installed in different universities are used. One apparatus, which was used to measure data in high temperature region, is installed at Toyama Prefectural University, and the other apparatus, which was for low temperatures, is installed at Kyushu University. To achieve the low GWP values less than 150 (European F gas regulation value), the composition of R32 (difluoromethane; CH2F2, GWP = 677) should be less than 22 % in mass fraction (38 % in mole fraction). Therefore, we tried to obtain precisely the data of lower R32 composition less than 0.38 mol fraction. The present data comparatively agreed with the only one set of reliable data by Hu in lower R32 compositions, from which we conclude that recent equation of state for R32/R1234yf, which is widely used recently all over the world, has systematic deviations less than 3 % in the bubble point pressures. Moreover, based on the present data and reliable literature data, the binary interaction parameter, kij, of the modified Peng-Robinson equation of state was regressed. As the result, we succeeded to reproduce the present bubble point and dew point pressure data with deviations smaller than 3 % as mentioned above for mixtures with low R32 concentrations.

中文翻译:

低 R32 浓度下 R32/R1234yf 二元混合物的汽液平衡特性测量

本研究获得了 R32/R1234yf 二元混合物气液平衡特性的精确测量值,这些混合物是下一代制冷剂混合物的关键成分。为了更快更准确地获得数据,使用了安装在不同大学的两台再循环式汽液平衡特性测量仪。一台用于测量高温地区数据的设备安装在富山县立大学,另一台用于低温区域的设备安装在九州大学。为了实现低于 150(欧洲 F 气体调节值)的低 GWP 值,R32(二氟甲烷;CH2F2,GWP = 677)的组成应小于质量分数的 22%(摩尔分数的 38%)。所以,我们试图精确获得低于 0.38 摩尔分数的较低 R32 组成的数据。目前的数据与胡在较低R32成分中唯一的一组可靠数据比较一致,由此得出结论,最近在世界范围内广泛使用的R32/R1234yf状态方程的系统偏差小于3 % 泡点压力。此外,基于现有数据和可靠的文献数据,对修正的彭-罗宾逊状态方程的二元相互作用参数 kij 进行了回归。结果,我们成功地重现了当前的泡点和露点压力数据,其偏差小于 3%,如上所述,对于低 R32 浓度的混合物。目前的数据与胡在较低R32成分中唯一的一组可靠数据比较一致,由此得出结论,最近在世界范围内广泛使用的R32/R1234yf状态方程的系统偏差小于3 % 泡点压力。此外,基于现有数据和可靠的文献数据,对修正的彭-罗宾逊状态方程的二元相互作用参数 kij 进行了回归。结果,我们成功地重现了当前的泡点和露点压力数据,其偏差小于 3%,如上所述,对于低 R32 浓度的混合物。目前的数据与胡在较低R32成分中唯一的一组可靠数据比较一致,由此得出结论,最近在世界范围内广泛使用的R32/R1234yf状态方程的系统偏差小于3 % 泡点压力。此外,基于现有数据和可靠的文献数据,对修正的彭-罗宾逊状态方程的二元相互作用参数 kij 进行了回归。结果,我们成功地重现了当前的泡点和露点压力数据,其偏差小于 3%,如上所述,对于低 R32 浓度的混合物。泡点压力的系统偏差小于 3%。此外,基于现有数据和可靠的文献数据,对修正的彭-罗宾逊状态方程的二元相互作用参数 kij 进行了回归。结果,我们成功地重现了当前的泡点和露点压力数据,其偏差小于 3%,如上所述,对于低 R32 浓度的混合物。泡点压力的系统偏差小于 3%。此外,基于现有数据和可靠的文献数据,对修正的彭-罗宾逊状态方程的二元相互作用参数 kij 进行了回归。结果,我们成功地重现了当前的泡点和露点压力数据,其偏差小于 3%,如上所述,对于低 R32 浓度的混合物。
更新日期:2020-10-15
down
wechat
bug