Measurements of saturated densities and critical parameters for the binary mixture of 2,3,3,3-tetrafluoropropene (R-1234yf) + difluoromethane (R-32)
Measurements of saturated densities and critical parameters for the binary mixture of 2,3,3,3-tetrafluoropropene (R-1234yf) + difluoromethane (R-32)
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DOI：
10.1016/j.ijrefrig.2013.02.005
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发表时间：
2013-06-01
期刊：
影响因子：
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通讯作者：
Higashi, Yukihiro
中科院分区：
文献类型：
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作者：
Akasaka, Ryo;Tanaka, Katsuyuki;Higashi, Yukihiro
用目视观察弯月面消失的方法测定了2，3，3，3-四氟丙烯（R-1234 yf）+二氟甲烷（R-32）二元混合物在临界点附近的汽液共存曲线。对于具有50.00质量%、80.01质量%和90.00质量%的R-1234 yf的混合物，分别获得11、18和11个饱和密度。由弯月面消失程度和临界乳光强度确定了混合物的临界温度、临界密度和临界摩尔体积。混合物的临界压力也从p ρ Tx测量的分析确定。用简单的关联式表示了临界参数的组成依赖性。(C)2013 Elsevier Ltd和IIR。All rights reserved.
The vapor liquid coexistence curves near the critical point of the binary mixture of 2,3,3,3-tetrafluoropropene (R-1234yf) + difluoromethane (R-32) were measured by means of the visual observation of meniscus disappearance. Eleven, eighteen, and eleven saturated densities were obtained for mixtures with 50.00 mass%, 80.01 mass%, and 90.00 mass% of R-1234yf, respectively. The critical temperatures, critical densities, and critical molar volumes of the mixtures were determined from the meniscus disappearing level and the intensity of the critical opalescence. The critical pressures of the mixtures were also determined from the analysis of p rho Tx measurements. The composition dependence of the critical parameters was formulated with simple correlations. (C) 2013 Elsevier Ltd and IIR. All rights reserved.