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Thermodynamic Properties of Ternary Mixtures of Fluorocarbon Refrigerants R-32, R-125 and R-134a

氟碳制冷剂R-32、R-125、R-134a三元混合物的热力学性能

基本信息

批准号：
11650237
负责人：
OGUCHI Kosei
金额：
$ 2.11万
依托单位：
Kanagawa Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650237/
关键词：
Fluorocarbon Refrigerants pVTx Properties R-32 R-125 R-134a Binary Mixtures Ternary Mixtures 熱力学性質 2次式型飽和蒸気圧曲線式 2次式型沸点曲線式 2次式型露点曲線式 PVTx関係

项目摘要

The purpose of the present research project is to make clear the thermodynamic properties of not only pure substances but also binary and ternary mixtures of fluorocarbon refrigerants R-32, R-125 and R-134a. The method of approaching to the final goal is based on the experimental works of their pVTx properties and on the collections and survey investigations of concerning research papers.The new knowledge was obtained after four years research works as follows :(1) The substitution refrigerants of not only pure substances but also binary and ternary mixtures of fluorocarbon refrigerants R-32, R-125 and R-134a have been expected to use for the refrigeration and air-conditioning devices, protecting the ozone layer from their depletion. But most research works were conducted only for the limited properties and range of temperatures, pressures, densities, and compositions. Then it is very difficult to analyze precisely the composition distribution of refrigerants in the devices. Therefore still the precise measurements of thermodynamic properties are required to correlate their precise thermodynamic equations of state.(2) The present experimental equipment was designed, constructed and calibrated for the precise pVTx property measurements. But there exists a little difficulties of handling the differential pressure detector, which was originally designed and manufactured. So sometimes the measurements were delayed from time schedules by unexpected accidents, and the measurements of pVTx properties for ternary mixtures of R-32, R-125 and R-134a were not made in this occasion except the measurements of pVTx properties for pure substances and binary mixtures of R-32, R-125 and R-134a. Therefore, the precise measurements are still conducted.

本研究项目的目的不仅是明确纯物质的热力学性质，而且是二元和三元混合的氟碳制冷剂R-32， R-125和R-134a。接近最终目标的方法是基于其pVTx特性的实验工作和相关研究论文的收集和调查调查。经过4年的研究工作，获得了以下新认识：(1)在制冷和空调装置中不仅可以使用纯物质替代制冷剂，还可以使用氟碳制冷剂R-32、R-125和R-134a的二元和三元混合物替代制冷剂，以保护臭氧层不受破坏。但是，大多数研究工作只是针对有限的性质和温度、压力、密度和成分范围进行的。因此，要准确分析装置中制冷剂的成分分布是非常困难的。因此，仍然需要对热力学性质进行精确的测量，以便将它们的精确热力学状态方程联系起来。(2)本实验设备是为精确测量pVTx特性而设计、制造和校准的。但由于原设计制造的压差检测仪在操作上存在一些困难。因此，有时测量由于意外事故而推迟，在这种情况下，除了测量纯物质和R-32、R-125和R-134a的二元混合物的pVTx性质外，没有测量R-32、R-125和R-134a的三元混合物的pVTx性质。因此，仍在进行精确的测量。