Measurement of the vapor-liquid equilibrium properties of the binary low GWP refrigerant R32/R1123
Measurement of the vapor-liquid equilibrium properties of the binary low GWP refrigerant R32/R1123
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二元低 GWP 制冷剂 R32/R1123 汽液平衡特性的测量
DOI：
10.1016/j.ijrefrig.2020.07.005
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发表时间：
2020
影响因子：
3.9
通讯作者：
Y. Higashi
中科院分区：
文献类型：
--
作者：
H. Miyamoto;T. Saito;N. Sakoda;U. Perera;T. Ishii;K. Thu;Y. Higashi
对R32/R1123二元混合制冷剂的汽液平衡性质进行了精确测定。这种混合物有可能降低全球升温潜能值，尽管关于其性质的数据极其有限，特别是关于汽液平衡特性，如沸点和露点压力，没有实际的实验数据。本研究通过位于不同大学的两个再循环型装置获得了这些数据。一个装置，这是用来测量在高温区的数据，安装在富山县立大学，包括一个光学池和两个循环回路与恒温液浴。热平衡后，将两个回路中的一部分样品夹在两个阀之间并与氦气混合，然后使用气相色谱法测定组成。九州大学的另一台用于低温区域的设备具有类似的设计。在300和330 K之间使用高温装置和在273至313 K之间使用低温装置获得汽液平衡数据。这些数据进行了比较，从亥姆霍兹型状态方程的预测和系统偏差约1%，在低温下观察到。用二元相互作用参数kij对修正的Peng-Robinson状态方程进行回归分析，更准确地再现了测量结果。
The vapor–liquid equilibrium properties of R32/R1123 binary refrigerant mixtures were precisely determined. Such mixtures have the potential to provide a reduced global warming potential although data regarding their properties is extremely limited, especially with regard to vapor–liquid equilibrium characteristics such as boiling point and dew point pressures, for which no actual experimental data exist. The present study acquired such data by means of two recirculation type apparatuses located at different universities. One apparatus, which was used to measure data in high temperature region, is installed at Toyama Prefectural University and includes an optical cell and two circulation loops with a thermostatted liquid bath. After thermal equilibration, a part of the sample in both loops is sandwiched between two valves and mixed with helium, following which the compositions are determined using gas chromatograpy. The other apparatus, which was for lower temperature region, at Kyushu University, has a similar design. The vapor–liquid equilibrium data were obtained between 300 and 330 K using the apparatus for high temperatures and from 273 to 313 K using the apparatus for low temperatures. These data were compared with predictions from the Helmholtz-type equation of state and a systematic deviation of approximately 1% was observed at low temperatures. A regression analysis using the binary interaction parameterkijfor the modified Peng–Robinson equation of state more accurately reproduced the present measurement results.